The ABCD3TA is a 128-channel ASIC with binary architecture for the readout of silicon strip particle detectors in the Semiconductor Tracker of the ATLAS experiment at the Large Hadron Collider (LHC). The chip comprises fast front-end and amplitude discriminator circuits using bipolar devices, a binary pipeline for first level trigger latency, a second level derandomising buffer and data compression circuitry based on CMOS devices. It has been designed and fabricated in a BiCMOS radiation resistant process. Extensive testing of the ABCD3TA chips assembled into detector modules show that the design meets the specifications and maintains the required performance after irradiation up to a total ionising dose of 10 Mrad and a 1-MeV neutron equivalent fluence of 2×1014 n/cm2, corresponding to 10 years of operation of the LHC at its design luminosity. Wafer screening and quality assurance procedures have been developed and implemented in large volume production to ensure that the chips assembled into modules meet the rigorous acceptance criteria.
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aut-affil-num=148 ORCID= en-aut-name=GarciaC en-aut-sei=Garcia en-aut-mei=C kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=149 ORCID= en-aut-name=Garcia-NavarroJ E en-aut-sei=Garcia-Navarro en-aut-mei=J E kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=150 ORCID= en-aut-name=Gonzalez-SevillaS en-aut-sei=Gonzalez-Sevilla en-aut-mei=S kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=151 ORCID= en-aut-name=LacastaC en-aut-sei=Lacasta en-aut-mei=C kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=152 ORCID= en-aut-name=LlosaG en-aut-sei=Llosa en-aut-mei=G kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=153 ORCID= en-aut-name=Marti-GarciaS en-aut-sei=Marti-Garcia en-aut-mei=S kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=154 ORCID= en-aut-name=ModestoP en-aut-sei=Modesto en-aut-mei=P kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=155 ORCID= en-aut-name=SanchezF J en-aut-sei=Sanchez en-aut-mei=F J kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=156 ORCID= en-aut-name=SospedraL en-aut-sei=Sospedra en-aut-mei=L kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=157 ORCID= en-aut-name=VosM en-aut-sei=Vos en-aut-mei=M kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=158 ORCID= affil-num=1 en-affil= kn-affil=Instituto de Microelectronica de Barcelona, IMB-CNM, CSIC, Barcelona, Spain affil-num=2 en-affil= kn-affil=Instituto de Microelectronica de Barcelona, IMB-CNM, CSIC, Barcelona, Spain affil-num=3 en-affil= kn-affil=Instituto de Microelectronica de Barcelona, IMB-CNM, CSIC, Barcelona, Spain affil-num=4 en-affil= kn-affil=Instituto de Microelectronica de Barcelona, IMB-CNM, CSIC, Barcelona, Spain affil-num=5 en-affil= kn-affil=Instituto de Microelectronica de Barcelona, IMB-CNM, CSIC, Barcelona, Spain affil-num=6 en-affil= kn-affil=Instituto de Microelectronica de Barcelona, IMB-CNM, CSIC, Barcelona, Spain affil-num=7 en-affil= kn-affil=Instituto de Microelectronica de Barcelona, IMB-CNM, CSIC, Barcelona, Spain affil-num=8 en-affil= kn-affil=Instituto de Microelectronica de Barcelona, IMB-CNM, CSIC, Barcelona, Spain affil-num=9 en-affil= kn-affil=University of Bergen, Bergen, Norway affil-num=10 en-affil= kn-affil=University of Bergen, Bergen, Norway affil-num=11 en-affil= kn-affil=University of Bergen, Bergen, Norway affil-num=12 en-affil= kn-affil=University of Bergen, Bergen, Norway affil-num=13 en-affil= kn-affil=University of Bergen, Bergen, Norway affil-num=14 en-affil= kn-affil=Lawrence Berkeley Laboratory and University of California, Berkeley, California, USA affil-num=15 en-affil= kn-affil=Lawrence Berkeley Laboratory and University of California, Berkeley, California, USA affil-num=16 en-affil= kn-affil=Lawrence Berkeley Laboratory and University of California, Berkeley, California, USA affil-num=17 en-affil= kn-affil=Lawrence Berkeley Laboratory and University of California, Berkeley, California, USA affil-num=18 en-affil= kn-affil=Lawrence Berkeley Laboratory and University of California, Berkeley, California, USA affil-num=19 en-affil= kn-affil=Lawrence Berkeley Laboratory and University of California, Berkeley, California, USA affil-num=20 en-affil= kn-affil=Lawrence Berkeley Laboratory and University of California, Berkeley, California, USA affil-num=21 en-affil= kn-affil=Lawrence Berkeley Laboratory and University of California, Berkeley, California, USA affil-num=22 en-affil= kn-affil=School of Physics and Astronomy, The University of Birmingham, Birmingham, UK affil-num=23 en-affil= kn-affil=School of Physics and Astronomy, The University of Birmingham, Birmingham, UK affil-num=24 en-affil= kn-affil=School of Physics and Astronomy, The University of Birmingham, Birmingham, UK affil-num=25 en-affil= kn-affil=School of Physics and Astronomy, The University of Birmingham, Birmingham, UK affil-num=26 en-affil= kn-affil=School of Physics and Astronomy, The University of Birmingham, Birmingham, UK affil-num=27 en-affil= kn-affil=School of Physics and Astronomy, The University of Birmingham, Birmingham, UK affil-num=28 en-affil= kn-affil=School of Physics and Astronomy, The University of Birmingham, Birmingham, UK affil-num=29 en-affil= kn-affil=School of Physics and Astronomy, The University of Birmingham, Birmingham, UK affil-num=30 en-affil= kn-affil=School of Physics and Astronomy, The University of Birmingham, Birmingham, UK affil-num=31 en-affil= kn-affil=Cavendish Laboratory, Cambridge University, Cambridge, UK affil-num=32 en-affil= kn-affil=Cavendish Laboratory, Cambridge University, Cambridge, UK affil-num=33 en-affil= kn-affil=Cavendish Laboratory, Cambridge University, Cambridge, UK affil-num=34 en-affil= kn-affil=Cavendish Laboratory, Cambridge University, Cambridge, UK affil-num=35 en-affil= kn-affil=Cavendish Laboratory, Cambridge University, Cambridge, UK affil-num=36 en-affil= kn-affil=Cavendish Laboratory, Cambridge University, Cambridge, UK affil-num=37 en-affil= kn-affil=Cavendish Laboratory, Cambridge University, Cambridge, UK affil-num=38 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=39 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=40 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=41 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=42 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=43 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=44 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=45 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=46 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=47 en-affil= kn-affil=CERN, European Organization for Nuclear Research, Geneva, Switzerland affil-num=48 en-affil= kn-affil=Faculty Physics and Applied Computer Science, AGH University Science Technology, Krakow, Poland affil-num=49 en-affil= kn-affil=Faculty Physics and Applied Computer Science, AGH University Science Technology, Krakow, Poland affil-num=50 en-affil= kn-affil=Faculty Physics and Applied Computer Science, AGH University Science Technology, Krakow, Poland affil-num=51 en-affil= kn-affil=Faculty Physics and Applied Computer Science, AGH University Science Technology, Krakow, Poland affil-num=52 en-affil= kn-affil=Faculty Physics and Applied Computer Science, AGH University Science Technology, Krakow, Poland affil-num=53 en-affil= kn-affil=The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland affil-num=54 en-affil= kn-affil=The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland affil-num=55 en-affil= kn-affil=The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland affil-num=56 en-affil= kn-affil=The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland affil-num=57 en-affil= kn-affil=The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland affil-num=58 en-affil= kn-affil=The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland affil-num=59 en-affil= kn-affil=The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland affil-num=60 en-affil= kn-affil=The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland affil-num=61 en-affil= kn-affil=The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland affil-num=62 en-affil= kn-affil=Max-Planck-Institut fur Physik, Munchen, Germany affil-num=63 en-affil= kn-affil=Max-Planck-Institut fur Physik, Munchen, Germany affil-num=64 en-affil= kn-affil=Max-Planck-Institut fur Physik, Munchen, Germany affil-num=65 en-affil= kn-affil=Max-Planck-Institut fur Physik, Munchen, Germany affil-num=66 en-affil= kn-affil=Max-Planck-Institut fur Physik, Munchen, Germany affil-num=67 en-affil= kn-affil=Max-Planck-Institut fur Physik, Munchen, Germany affil-num=68 en-affil= kn-affil=Max-Planck-Institut fur Physik, Munchen, Germany affil-num=69 en-affil= kn-affil=Max-Planck-Institut fur Physik, Munchen, Germany affil-num=70 en-affil= kn-affil=Max-Planck-Institut fur Physik, Munchen, Germany affil-num=71 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=72 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=73 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=74 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=75 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=76 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=77 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=78 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=79 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=80 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=81 en-affil= kn-affil=NIKHEF, Amsterdam, The Netherlands affil-num=82 en-affil= kn-affil=Physics Department, Okayama University, Okayama, Japan affil-num=83 en-affil= kn-affil=Physics Department, Okayama University, Okayama, Japan affil-num=84 en-affil= kn-affil=University of Oslo, Oslo, Norway affil-num=85 en-affil= kn-affil=University of Oslo, Oslo, Norway affil-num=86 en-affil= kn-affil=University of Oslo, Oslo, Norway affil-num=87 en-affil= kn-affil=University of Oslo, Oslo, Norway affil-num=88 en-affil= kn-affil=University of Oslo, Oslo, Norway affil-num=89 en-affil= kn-affil=Department of Physics, Oxford University, Oxford, UK affil-num=90 en-affil= kn-affil=Department of Physics, Oxford University, Oxford, UK affil-num=91 en-affil= kn-affil=Department of Physics, Oxford University, Oxford, UK affil-num=92 en-affil= kn-affil=Academy of Sciences of the Czech Republic (ASCR), Prague, Czech Republic affil-num=93 en-affil= kn-affil=Academy of Sciences of the Czech Republic (ASCR), Prague, Czech Republic affil-num=94 en-affil= kn-affil=Academy of Sciences of the Czech Republic (ASCR), Prague, Czech Republic affil-num=95 en-affil= kn-affil=Charles University, Prague, Czech Republic affil-num=96 en-affil= kn-affil=Charles University, Prague, Czech Republic affil-num=97 en-affil= kn-affil=Charles University, Prague, Czech Republic affil-num=98 en-affil= kn-affil=Charles University, Prague, Czech Republic affil-num=99 en-affil= kn-affil=Charles University, Prague, Czech Republic affil-num=100 en-affil= kn-affil=Charles University, Prague, Czech Republic affil-num=101 en-affil= kn-affil=Charles University, Prague, Czech Republic affil-num=102 en-affil= kn-affil=Charles University, Prague, Czech Republic affil-num=103 en-affil= kn-affil=Czech Technical University, Prague, Czech Republic affil-num=104 en-affil= kn-affil=Czech Technical University, Prague, Czech Republic affil-num=105 en-affil= kn-affil=Czech Technical University, Prague, Czech Republic affil-num=106 en-affil= kn-affil=Czech Technical University, Prague, Czech Republic affil-num=107 en-affil= kn-affil=Czech Technical University, Prague, Czech Republic affil-num=108 en-affil= kn-affil=Czech Technical University, Prague, Czech Republic affil-num=109 en-affil= kn-affil=Czech Technical University, Prague, Czech Republic affil-num=110 en-affil= kn-affil=Czech Technical University, Prague, Czech Republic affil-num=111 en-affil= kn-affil=Czech Technical University, Prague, Czech Republic affil-num=112 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=113 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=114 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=115 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=116 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=117 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=118 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=119 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=120 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=121 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=122 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=123 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=124 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=125 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=126 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=127 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=128 en-affil= kn-affil=Rutherford Appleton Laboratory, Chilton, Didcot, UK affil-num=129 en-affil= kn-affil=Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, USA affil-num=130 en-affil= kn-affil=Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, USA affil-num=131 en-affil= kn-affil=Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, USA affil-num=132 en-affil= kn-affil=Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, USA affil-num=133 en-affil= kn-affil=Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, USA affil-num=134 en-affil= kn-affil=Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, USA affil-num=135 en-affil= kn-affil=Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, USA affil-num=136 en-affil= kn-affil=Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, USA affil-num=137 en-affil= kn-affil=Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, USA affil-num=138 en-affil= kn-affil=Institute of Physics, University of Tsukuba, Tsukuba, Japan affil-num=139 en-affil= kn-affil=Institute of Physics, University of Tsukuba, Tsukuba, Japan affil-num=140 en-affil= kn-affil=Institute of Physics, University of Tsukuba, Tsukuba, Japan affil-num=141 en-affil= kn-affil=Department of Radiation Sciences, Uppsala Universit, Uppsala, Sweden affil-num=142 en-affil= kn-affil=Department of Radiation Sciences, Uppsala Universit, Uppsala, Sweden affil-num=143 en-affil= kn-affil=Department of Radiation Sciences, Uppsala Universit, Uppsala, Sweden affil-num=144 en-affil= kn-affil=Department of Radiation Sciences, Uppsala Universit, Uppsala, Sweden affil-num=145 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=146 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=147 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=148 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=149 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=150 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=151 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=152 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=153 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=154 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=155 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=156 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=157 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain affil-num=158 en-affil= kn-affil=Instituto de Fisica Corpuscular (IFIC), Universidad de Valencia-CSIC, Valencia, Spain en-keyword=Front-end electronics kn-keyword=Front-end electronics en-keyword=Binary readout kn-keyword=Binary readout en-keyword=Silicon strip detectors kn-keyword=Silicon strip detectors en-keyword=Tracking detectors kn-keyword=Tracking detectors en-keyword=Radiation damage kn-keyword=Radiation damage END start-ver=1.4 cd-journal=joma no-vol=413 cd-vols= no-issue=4-6 article-no= start-page=379 end-page=383 dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=20050926 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Fabrication of a logic gate circuit based on ambipolar field-effect transistors with thin films of C60 and pentacene en-subtitle= kn-subtitle= en-abstract= kn-abstract=Ambipolar field-effect transistor (FET) devices were fabricated with a heterostructure of C60 and pentacene, and their p- and n-channel field-effect mobilities were studied as a function of thickness of pentacene thin-films. The observed dependences of the μ values were interpreted in terms of the morphology of the thin films and the band structure of C60/pentacene heterostructure. A complementary metal-oxide-semiconductor (CMOS) circuit was fabricated by integration of two ambipolar FETs, aiming at realization of a new CMOS inverter circuit composed of FETs with the same device structure. The gain of 4, the threshold voltage of 85 V, and the complex output characteristics were explained on the basis of the properties of the component FET devices.
en-copyright= kn-copyright= en-aut-name=KuwaharaEiji en-aut-sei=Kuwahara en-aut-mei=Eiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KusaiHaruka en-aut-sei=Kusai en-aut-mei=Haruka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NaganoTakayuki en-aut-sei=Nagano en-aut-mei=Takayuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=TakayanagiToshio en-aut-sei=Takayanagi en-aut-mei=Toshio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=KubozonoYoshihiro en-aut-sei=Kubozono en-aut-mei=Yoshihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=2 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=3 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=4 en-affil= kn-affil=Department of Chemistry, Okayama University affil-num=5 en-affil= kn-affil=Department of Chemistry, Okayama University en-keyword=Band structure kn-keyword=Band structure en-keyword=Carbon kn-keyword=Carbon en-keyword=CMOS integrated circuits kn-keyword=CMOS integrated circuits en-keyword=Field effect transistors kn-keyword=Field effect transistors en-keyword=Logic gates kn-keyword=Logic gates en-keyword=Thin films kn-keyword=Thin films en-keyword=Threshold voltage kn-keyword=Threshold voltage en-keyword=Band structures kn-keyword=Band structures en-keyword=Logic gate circuits kn-keyword=Logic gate circuits en-keyword=N-channel field-effective mobilities kn-keyword=N-channel field-effective mobilities en-keyword=Pentacene kn-keyword=Pentacene en-keyword=Logic circuits kn-keyword=Logic circuits END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue=1 article-no= start-page=354 end-page=363 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19971 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Control strategy and site selection of a shunt active filter for damping of harmonic propagation in power distribution systems en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper deals with a shunt active filter which will be installed by an electric utility, putting much emphasis on the control strategy and the best point of installation of the shunt active filter on a feeder in a power distribution system. The objective of the shunt active filter is to damp harmonic propagation, which results from harmonic resonance between many capacitors for power factor improvement and line inductors in the feeder, rather than to minimize voltage distortion throughout the feeder. Harmonic mitigation is a welcome “by-product” of the shunt active filter, which comes from damping of harmonic propagation. This paper concludes that the shunt active filter based on detection of voltage at the point of installation is superior in stability to others, and that the best site selection is not the beginning terminal but the end terminal of the primary line in the feeder. Computer simulation is performed to verify the validity and effectiveness of the shunt active filter by means of an analog circuit simulator, which is characterized by installing it on a feeder of a radial distribution system in a residential area
en-copyright= kn-copyright= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Okayama University en-keyword=active filters kn-keyword=active filters en-keyword=distribution networks kn-keyword=distribution networks en-keyword=harmonic distortion kn-keyword=harmonic distortion en-keyword=power factor correction kn-keyword=power factor correction en-keyword=power filters kn-keyword=power filters en-keyword=power system control kn-keyword=power system control en-keyword=power system harmonics kn-keyword=power system harmonics en-keyword=power system stability kn-keyword=power system stability END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=6 article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=199911 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Control and analysis of a unified power flow controller en-subtitle= kn-subtitle= en-abstract= kn-abstract=<p>This paper presents a control scheme and comprehensive analysis for a unified power flow controller (UPFC) on the basis of theory, computer simulation and experiment. This developed theoretical analysis reveals that a conventional power feedback control scheme makes the UPFC induce power fluctuation in transient states. The conventional control scheme cannot attenuate the power fluctuation, and so the time constant of damping is independent of active and reactive power feedback gains integrated in its control circuit. This paper proposes an advanced control scheme which has the function of successfully damping out the power fluctuation. A UPFC rated at 10 kVA is designed and constructed, which is a combination of a series device consisting of three single-phase pulsewidth modulation (PWM) converters and a shunt device consisting of a three-phase diode rectifier. Although the dynamics of the shunt device are not included, it is possible to confirm and demonstrate the performance of the series device. Experimental results agree well with both analytical and simulated results and show viability and effectiveness of the proposed control scheme </p>
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=WatanabeYasuhiro en-aut-sei=Watanabe en-aut-mei=Yasuhiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=AC-DC power convertors kn-keyword=AC-DC power convertors en-keyword=PWM power convertors kn-keyword=PWM power convertors en-keyword=control system analysis computing kn-keyword=control system analysis computing en-keyword=control system synthesis kn-keyword=control system synthesis en-keyword=damping kn-keyword=damping en-keyword=feedback kn-keyword=feedback en-keyword=load flow control kn-keyword=load flow control en-keyword=power control kn-keyword=power control en-keyword=power kn-keyword=power en-keyword=system control kn-keyword=system control en-keyword=rectifying circuits kn-keyword=rectifying circuits END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=279 end-page=286 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=19964 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Pulse-density-modulated power control of a 4 kW, 450 kHz voltage-source inverter for induction melting applications en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a 4 kW, 450 kHz voltage-source inverter with a series resonant circuit for induction melting applications, which is characterized by the power control based on pulse density modulation (PDM). The pulse-density-modulated inverter makes an induction melting system simple and compact, thus leading to higher efficiency. A modulation strategy is proposed to realize the induction melting system capable of operation at the frequency and power level of interest. Some interesting experimental results are shown to verify the validity of the concept
en-copyright= kn-copyright= en-aut-name=FujitaHideki en-aut-sei=Fujita en-aut-mei=Hideki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=induction heating kn-keyword=induction heating en-keyword=melting kn-keyword=melting en-keyword=power control kn-keyword=power control en-keyword=pulse modulation kn-keyword=pulse modulation en-keyword=resonant power convertors kn-keyword=resonant power convertors END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue= article-no= start-page=29 end-page=36 dt-received= dt-revised= dt-accepted= dt-pub-year=1995 dt-pub=199510 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Modeling and damping of high-frequency leakage currents in PWM inverter-fed AC motor drive systems en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents an equivalent circuit for high-frequency leakage currents in pulsewidth modulation (PWM) inverter-fed AC motors, which forms a series resonant circuit. The analysis based on the equivalent circuit leads to such a conclusion that the connection of a conventional common-mode choke or reactor in series between the AC terminals of a PWM inverter and those of an AC motor is not effective to reduce the rms and average values of the leakage current, but effective to reduce the peak value. Furthermore, this paper proposes a common-mode transformer which is different in damping principle from the conventional common-mode choke. It is shown theoretically and experimentally that the common-mode transformer is able to reduce the rms value of the leakage current to 25%, where the core used in the common-mode transformer is smaller than that of the conventional common-mode choke
en-copyright= kn-copyright= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=AC motor drives kn-keyword=AC motor drives en-keyword=PWM invertors kn-keyword=PWM invertors en-keyword=circuit resonance kn-keyword=circuit resonance en-keyword=damping kn-keyword=damping en-keyword=equivalent circuits kn-keyword=equivalent circuits en-keyword=inductors kn-keyword=inductors en-keyword=leakage currents kn-keyword=leakage currents en-keyword=resonance kn-keyword=resonance en-keyword=transformers kn-keyword=transformers END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=6 article-no= start-page=1021 end-page=1027 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=199911 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Control and analysis of a unified power flow controller en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a control scheme and comprehensive analysis for a unified power flow controller (UPFC) on the basis of theory, computer simulation and experiment. This developed theoretical analysis reveals that a conventional power feedback control scheme makes the UPFC induce power fluctuation in transient states. The conventional control scheme cannot attenuate the power fluctuation, and so the time constant of damping is independent of active and reactive power feedback gains integrated in its control circuit. This paper proposes an advanced control scheme which has the function of successfully damping out the power fluctuation. A UPFC rated at 10 kVA is designed and constructed, which is a combination of a series device consisting of three single-phase pulsewidth modulation (PWM) converters and a shunt device consisting of a three-phase diode rectifier. Although the dynamics of the shunt device are not included, it is possible to confirm and demonstrate the performance of the series device. Experimental results agree well with both analytical and simulated results and show viability and effectiveness of the proposed control scheme
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=WatanabeYasuhiro en-aut-sei=Watanabe en-aut-mei=Yasuhiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=430 end-page=436 dt-received= dt-revised= dt-accepted= dt-pub-year=2001 dt-pub=20019 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A global routing technique for wave-steered design methodology en-subtitle= kn-subtitle= en-abstract= kn-abstract=Wave-Steering is a new circuit design methodology to realize high throughput circuits by embedding layout friendly structures in silicon. Latches guarantee correct signal arrival times at the input of synthesized modules and maintain the high throughput of operation. This paper presents a global routing technique for networks of wave-steered blocks. Latches can be distributed along interconnects. Their number depends on net topologies and signal ordering at the inputs of wave steered blocks. here, we route nets using Steiner tree heuristics and determine signal ordering and latch positions on interconnect. The problem of total latch number minimization is solved using SAT formulation. Experimental results on benchmark circuits show the efficiency of our technique. We achieve on average a 40% latch reduction at minimum latency over un-optimized circuits operating at 250 MHz in 0.25 μm CMOS technology
en-copyright= kn-copyright= en-aut-name=FunabikiNobuo en-aut-sei=Funabiki en-aut-mei=Nobuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SinghAmit en-aut-sei=Singh en-aut-mei=Amit kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=MukherjeeArindam en-aut-sei=Mukherjee en-aut-mei=Arindam kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SadowskaMalgorzata Marek en-aut-sei=Sadowska en-aut-mei=Malgorzata Marek kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=University of California affil-num=3 en-affil= kn-affil=University of California affil-num=4 en-affil= kn-affil=University of California en-keyword=binary decision diagrams kn-keyword=binary decision diagrams en-keyword=circuit layout CAD kn-keyword=circuit layout CAD en-keyword=flip-flops kn-keyword=flip-flops en-keyword=integrated circuit layout kn-keyword=integrated circuit layout en-keyword=network routing kn-keyword=network routing END start-ver=1.4 cd-journal=joma no-vol=42 cd-vols= no-issue=7 article-no= start-page=1154 end-page=1161 dt-received= dt-revised= dt-accepted= dt-pub-year=1994 dt-pub=19947 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A waveguide type power divider/combiner of double-ladder multiple-port structure en-subtitle= kn-subtitle= en-abstract= kn-abstract=We propose a waveguide type microwave power divider/combiner of double ladder multiport structure which is advantageous for its very low insertion loss and high power capability. Analysis based on equivalent circuits give the design formula for perfect power dividing/combining. Numerical analysis gives optimal design parameters for broadband characteristics both of the divider and of the combiner. Analyses of power flows in the divider structure and isolation characteristic are given. Operation characteristics of divider-combiner system and the effect of phase deviation in combiner input signals on the combining efficiency are also discussed. Experiments showed good performances in accordance with the theory: the -0.5 dB relative bandwidths of four-, eight-, and twelve-way deciders were as large as 0.5, 0.38, and 0.38 respectively. For four- and eight-way divider-combiner systems, relative bandwidths were 0.22 and 0.13, respectively both with insertion loss of less than 0.1 dB en-copyright= kn-copyright= en-aut-name=SanadaAtsushi en-aut-sei=Sanada en-aut-mei=Atsushi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=FukuiKiyoshi en-aut-sei=Fukui en-aut-mei=Kiyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NogiShigeji en-aut-sei=Nogi en-aut-mei=Shigeji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=S-parameters kn-keyword=S-parameters en-keyword=equivalent circuits kn-keyword=equivalent circuits en-keyword=ladder networks kn-keyword=ladder networks en-keyword=multiport networks kn-keyword=multiport networks en-keyword=waveguide kn-keyword=waveguide en-keyword=components kn-keyword=components END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue=5 article-no= start-page=835 end-page=841 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19971230 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An active circuit for cancellation of common-mode voltage generated by a PWM inverter en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper proposes an active common-noise canceler (ACC) that is capable of eliminating the common-mode voltage produced by a pulsewidth modulation (PWM) inverter. An emitter follower using complementary transistors and a common-mode transformer are incorporated into the ACC, the design method of which is also presented in detail. Experiments using a prototype ACC, whose design and construction are discussed in this paper, verify its viability and effectiveness in eliminating common-mode voltage in a 3.7 kW induction motor drive using an insulated gate bipolar transistor (IGBT) inverter. Some experimental results show that the ACC makes significant contributions to reducing a ground current and a conducted electromagnetic interference (EMI). In addition, the ACC can prevent an electric shock on a nongrounded motor frame and can suppress motor shaft voltage
en-copyright= kn-copyright= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AyanoHideki en-aut-sei=Ayano en-aut-mei=Hideki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=PWM invertors kn-keyword=PWM invertors en-keyword=active networks kn-keyword=active networks en-keyword=amplifiers kn-keyword=amplifiers en-keyword=electromagnetic compatibility kn-keyword=electromagnetic compatibility en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=induction motor drives kn-keyword=induction motor drives en-keyword=insulated gate bipolar transistors kn-keyword=insulated gate bipolar transistors en-keyword=interference suppression kn-keyword=interference suppression END start-ver=1.4 cd-journal=joma no-vol=47 cd-vols= no-issue=1 article-no= start-page=2 end-page=9 dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=20052 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Convergence acceleration and accuracy improvement in power bus impedance calculation with a fast algorithm using cavity modes en-subtitle= kn-subtitle= en-abstract= kn-abstract=Based on the cavity-mode model, we have developed a fast algorithm for calculating power bus impedance in multilayer printed circuit boards. The fast algorithm is based on a closed-form expression for the impedance Z matrix of a rectangular power bus structure; this expression was obtained by reducing the original double infinite series into a single infinite series under an approximation. The convergence of the single series is further accelerated analytically. The accelerated single summation enables much faster computation, since use of only a few terms is enough to obtain good accuracy. In addition, we propose two ways to compensate for the error due to the approximation involved in the process of reducing the double series to the single series, and have demonstrated that these two techniques are almost equivalent. en-copyright= kn-copyright= en-aut-name=WangZhi Liang en-aut-sei=Wang en-aut-mei=Zhi Liang kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=WadaOsami en-aut-sei=Wada en-aut-mei=Osami kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ToyotaYoshitaka en-aut-sei=Toyota en-aut-mei=Yoshitaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University en-keyword=Cavity-mode model kn-keyword=Cavity-mode model en-keyword=closed-form expression for fast calculation kn-keyword=closed-form expression for fast calculation en-keyword=power bus impedance kn-keyword=power bus impedance en-keyword=power bus kn-keyword=power bus en-keyword=resonance kn-keyword=resonance END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue= article-no= start-page=1235 end-page=1241 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=199610 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Control and performance of a zero-current-switched three-phase inverter equipped with resonant circuits on the AC-side en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a zero-current-switched voltage-fed inverter equipped with resonant circuits on the AC side. The current flowing through a switching device, i.e., an IGBT is a sum of the load current and the resonant current. If the amplitude of the resonant current is larger than that of the load current, the current in a switching device becomes zero at an instant in each resonant cycle. This allows the switching device to be turned on or off at the zero current. The zero-current-switching makes a significant contribution to reduction of switching losses and electromagnetic noises. In this paper, the principle of zero-current-switching operation, and a novel control scheme are described from a theoretical and practical point of view. Experimental results obtained from a laboratory system of 5 kVA verify the practicability. Moreover, the efficiency and losses of the proposed soft-switched inverter are compared with those of a hard-switched inverter
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=electric current control kn-keyword=electric current control en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=insulated gate bipolar transistors kn-keyword=insulated gate bipolar transistors en-keyword=invertors kn-keyword=invertors en-keyword=losses kn-keyword=losses en-keyword=power semiconductor switches kn-keyword=power semiconductor switches en-keyword=switching circuits kn-keyword=switching circuits END start-ver=1.4 cd-journal=joma no-vol=43 cd-vols= no-issue=1 article-no= start-page=14 end-page=20 dt-received= dt-revised= dt-accepted= dt-pub-year=1995 dt-pub=19951 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Traveling-wave microwave power divider composed of reflectionless dividing units en-subtitle= kn-subtitle= en-abstract= kn-abstract=We propose a new waveguide type traveling-wave microwave power divider that is adequate for high power applications. The divider is composed of multiple stages of reflectionless dividing units, each having two output ports. Design formulas for reflectionless equal-power dividing are first derived. Structural parameters for wideband design of two- to six-stage dividers are then obtained by means of numerical analyses based on an equivalent circuit. Comparison of experiments at X-band shows good qualitative agreement with the analyses. Typical measured bandwidth for relative divided powers deviation of less than ±0.5 dB was 2.7 GHz, and that for -20 dB return loss was more than 3.2 GHz for the four-stage (eight-way) divider. The divider presented here has excellent features; the bandwidth for equal-power dividing decreases very little and the bandwidth for low return loss increases with increasing number of the dividing stages. It also has advantages of low insertion loss and flexibility over the number of the dividing stages en-copyright= kn-copyright= en-aut-name=SanadaAtsushi en-aut-sei=Sanada en-aut-mei=Atsushi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=FukuiKiyoshi en-aut-sei=Fukui en-aut-mei=Kiyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NogiShigeji en-aut-sei=Nogi en-aut-mei=Shigeji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SanagiMinoru en-aut-sei=Sanagi en-aut-mei=Minoru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University en-keyword=S-matrix theory kn-keyword=S-matrix theory en-keyword=equivalent circuits kn-keyword=equivalent circuits en-keyword=losses kn-keyword=losses en-keyword=power dividers kn-keyword=power dividers END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=417 end-page=422 dt-received= dt-revised= dt-accepted= dt-pub-year=2002 dt-pub=200211 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=CMOS floating gate defect detection using I/sub DDQ/ test with DC power supply superposed by AC component en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, we propose a new I/sub DDQ/ test method for detecting floating gate defects in CMOS ICs. In the method, an unusual increase of the supply current, caused by defects, is promoted by superposing an AC component on the DC power supply. The feasibility of the test is examined by some experiments on four DUTs with an intentionally caused defect. The results showed that our method could detect clearly all the defects, one of which may be detected by neither any functional logic test nor any conventional I/sub DDQ/ test.
en-copyright= kn-copyright= en-aut-name=MichinishiHiroyuki en-aut-sei=Michinishi en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=YokohiraTokumi en-aut-sei=Yokohira en-aut-mei=Tokumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OkamotoTakuji en-aut-sei=Okamoto en-aut-mei=Takuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KobayashiToshifumi en-aut-sei=Kobayashi en-aut-mei=Toshifumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=HondoTsutomu en-aut-sei=Hondo en-aut-mei=Tsutomu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University of Science affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University of Science affil-num=4 en-affil= kn-affil=Mitsubishi Electric Company Limited affil-num=5 en-affil= kn-affil=Sharp Takaya Electronics Industry Company Limited en-keyword=CMOS logic circuits kn-keyword=CMOS logic circuits en-keyword=electric current measurement kn-keyword=electric current measurement en-keyword=integrated circuit testing kn-keyword=integrated circuit testing en-keyword=logic testing kn-keyword=logic testing END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=1396 end-page=1404 dt-received= dt-revised= dt-accepted= dt-pub-year=2000 dt-pub=200010 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A practical approach to switching-loss reduction in a large-capacity static VAr compensator based on voltage-source inverters en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a simple method for reduction of switching and snubbing losses in a large-capacity static VAr compensator (SVC) consisting of multiple three-phase voltage-source square-wave inverters. The proposed method is characterized by a “commutation capacitor” connected in parallel with each switching device. The commutation capacitor allows the SVC to perform zero-voltage switching, and to reduce switching losses. The electric charge stored in the commutation capacitor is not dissipated, but regenerated to the DC-link capacitor. Moreover, a soft-starting method for the SVC is also presented to avoid forming a short circuit across the commutation capacitor during startup. Experimental results obtained from a 10 kVAr laboratory setup are shown to verify the viability of the operating principle of the commutation capacitor
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TominagaShinji en-aut-sei=Tominaga en-aut-mei=Shinji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=commutation kn-keyword=commutation en-keyword=compensation kn-keyword=compensation en-keyword=invertors kn-keyword=invertors en-keyword=losses kn-keyword=losses en-keyword=power capacitors kn-keyword=power capacitors en-keyword=reactive power kn-keyword=reactive power en-keyword=static VAr compensators kn-keyword=static VAr compensators en-keyword=switching circuits kn-keyword=switching circuits END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=6 article-no= start-page=1014 end-page=1020 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=199911 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A 2-MHz 6-kVA voltage-source inverter using low-profile MOSFET modules for low-temperature plasma generators en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a 2 MHz 6 kVA voltage-source inverter for low-temperature plasma generators. A new MOSFET module referred to as a “mega pack” is specially designed and fabricated for high-frequency high-power applications. It has a low-profile package equipped with four terminal plates. The main circuit consists of a single-phase full-bridge inverter using the four new modules. The layout of the modules is characterized by two modules, which are placed back-to-back with each other, forming a half bridge. Both device and circuit designs achieve great reduction of stray inductance in the main circuit. A prototype inverter shows stable operation around frequencies as high as 2 MHz
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ShinoharaShinichi en-aut-sei=Shinohara en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Orgin Electric Co., Ltd. en-keyword=bridge circuits kn-keyword=bridge circuits en-keyword=inductance kn-keyword=inductance en-keyword=invertors kn-keyword=invertors en-keyword=plasma devices kn-keyword=plasma devices en-keyword=plasma kn-keyword=plasma en-keyword=production kn-keyword=production en-keyword=power MOSFET kn-keyword=power MOSFET END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=68 end-page=74 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=199611 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A test methodology for interconnect structures of LUT-based FPGAs en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper we consider testing for programmable interconnect structures of look-up table based FPGAs. The interconnect structure considered in the paper consists of interconnecting wires and programmable points (switches) to join them. As fault models, stuck-at faults of the wires, and extra-device faults and missing-device faults of the programmable points are considered. We heuristically derive test procedures for the faults and then show their validness and complexity
en-copyright= kn-copyright= en-aut-name=MichinishiHiroyuki en-aut-sei=Michinishi en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=YokohiraTokumi en-aut-sei=Yokohira en-aut-mei=Tokumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OkamotoTakuji en-aut-sei=Okamoto en-aut-mei=Takuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=InoueTomoo en-aut-sei=Inoue en-aut-mei=Tomoo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=FujiwaraHideo en-aut-sei=Fujiwara en-aut-mei=Hideo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Nara Institute of Science and Technology affil-num=5 en-affil= kn-affil=Nara Institute of Science and Technology en-keyword=SRAM chips kn-keyword=SRAM chips en-keyword=automatic testing kn-keyword=automatic testing en-keyword=design for testability kn-keyword=design for testability en-keyword=fault diagnosis kn-keyword=fault diagnosis en-keyword=field programmable gate arrays kn-keyword=field programmable gate arrays en-keyword=integrated circuit interconnections kn-keyword=integrated circuit interconnections en-keyword=logic testing kn-keyword=logic testing en-keyword=reconfigurable architectures kn-keyword=reconfigurable architectures en-keyword=sequential circuits kn-keyword=sequential circuits en-keyword=table lookup kn-keyword=table lookup END start-ver=1.4 cd-journal=joma no-vol=33 cd-vols= no-issue=5 article-no= start-page=1233 end-page=1240 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=199710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An approach to harmonic current-free AC/DC power conversion for large industrial loads: the integration of a series active filter with a double-series diode rectifier en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper proposes a new harmonic current-free AC/DC power conversion system characterized by the integration of a small-rated series active filter, with a large-rated double-series diode rectifier. The DC terminals of the active filter are directly connected in parallel with those of the diode rectifier, thereby forming a common DC bus. The active filter enables the diode rectifier to draw three-phase sinusoidal currents from the utility. In addition, it can provide the supplementary value-added function of regulating the common DC-bus voltage to a limited extent of ±5%, slightly increasing the RMS voltage rating, but not increasing the peak voltage rating. Experimental results obtained from a 5 kW laboratory system verify the practical viability and cost effectiveness of the proposed system
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=AC-DC power convertors kn-keyword=AC-DC power convertors en-keyword=active filters kn-keyword=active filters en-keyword=power filters kn-keyword=power filters en-keyword=rectifying circuits kn-keyword=rectifying circuits en-keyword=voltage control kn-keyword=voltage control END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue= article-no= start-page=928 end-page=933 dt-received= dt-revised= dt-accepted= dt-pub-year=2000 dt-pub=20006 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis and reduction of EMI conducted by a PWM inverter-fed AC motor drive system having long power cables en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper analyzes conducted EMI generated by a PWM inverter-fed induction motor drive system. It is shown experimentally and analytically that resonant phenomena in a high-frequency range beyond a dominant resonant frequency are originated from the behavior of power cables as a distributed-constant circuit. Spectra of common-mode and differential-mode currents are simulated by means of introducing a distributed-constant model of the power cables, which consists of a 20-step ladder circuit. As a result, it is also shown that these resonances can be damped out by a single common-mode transformer (CMT) and three differential-mode filters (DMFs), both of which have been proposed by the authors
en-copyright= kn-copyright= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Tokyo Institute of Technology en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=PWM invertors kn-keyword=PWM invertors en-keyword=bipolar transistor switches kn-keyword=bipolar transistor switches en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=induction motor drives kn-keyword=induction motor drives en-keyword=insulated gate bipolar transistors kn-keyword=insulated gate bipolar transistors en-keyword=ladder networks kn-keyword=ladder networks en-keyword=power bipolar transistors kn-keyword=power bipolar transistors en-keyword=power cables kn-keyword=power cables en-keyword=power semiconductor switches kn-keyword=power semiconductor switches en-keyword=power transformers kn-keyword=power transformers END start-ver=1.4 cd-journal=joma no-vol=35 cd-vols= no-issue=1 article-no= start-page=21 end-page=27 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=19992 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A 2-MHz 2-kW voltage-source inverter for low-temperature plasma generators: implementation of fast switching with a third-order resonant circuit en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a specially designed third-order resonant circuit intended to achieve fast switching operation for a voltage-source series-resonant inverter using four MOSFETs. The third-order resonant current superimposed on a sinusoidal load current helps to quickly charge or discharge the output capacitance of each MOSFET. This results not only in a reduction of the commutation period which is required to turn the MOSFET on and off, but also in an improvement of the displacement factor at the output of the inverter. Moreover, the third-order resonant circuit acts as a low-pass filter to suppress the parasitic oscillation between line inductance and stray capacitance. The viability and effectiveness of the third-order resonant circuit is verified by a 2 MHz 2 kW prototype inverter developed for a low-temperature plasma generator
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=invertors kn-keyword=invertors en-keyword=plasma production kn-keyword=plasma production en-keyword=power MOSFET kn-keyword=power MOSFET en-keyword=power kn-keyword=power en-keyword=semiconductor switches kn-keyword=semiconductor switches en-keyword=resonant power convertors kn-keyword=resonant power convertors en-keyword=switching circuits kn-keyword=switching circuits END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue= article-no= start-page=2015 end-page=2021 dt-received= dt-revised= dt-accepted= dt-pub-year=2001 dt-pub=200110 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Suppression of common-mode voltage in a PWM rectifier/inverter system en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper proposes a PWM rectifier/inverter system capable of suppressing not only supply harmonic currents but also electromagnetic interference (EMI). An active common-noise canceler (ACC) developed for this system is characterized by sophisticated connection of a common-mode transformer which can compensate for common-mode voltages produced by both PWM rectifier and inverter. As a result, the size of the common-mode transformer can be reduced to 1/3, compared with the previously proposed ACC. A prototype PWM rectifier/inverter system (2.2 kW) has been implemented and tested. Some experimental results show reduction characteristics of the supply harmonic current and EMI
en-copyright= kn-copyright= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Tokyo Institute of Technology en-keyword=AC-DC power convertors kn-keyword=AC-DC power convertors en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=PWM invertors kn-keyword=PWM invertors en-keyword=PWM power convertors kn-keyword=PWM power convertors en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=equivalent circuits kn-keyword=equivalent circuits en-keyword=harmonic distortion kn-keyword=harmonic distortion en-keyword=harmonics suppression kn-keyword=harmonics suppression en-keyword=power conversion harmonics kn-keyword=power conversion harmonics en-keyword=power transformers kn-keyword=power transformers en-keyword=rectifying circuits kn-keyword=rectifying circuits END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue= article-no= start-page=821 end-page=826 dt-received= dt-revised= dt-accepted= dt-pub-year=1993 dt-pub=199310 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A zero-current-switching based three-phase PWM inverter having resonant circuits on AC-side en-subtitle= kn-subtitle= en-abstract= kn-abstract=The authors present a zero-current-switching (ZCS)-based three-phase PWM (pulse-width-modulated) inverter having small resonant circuits on the AC side, whose resonant frequency is 50 kHz. The ZCS inverter can greatly reduce the switching losses and electromagnetic noise. The principle of ZCS operation, the design of the resonant circuits, and the control sequence are described from theoretical and practical points of view. Experimental results obtained from a ZCS PWM inverter driving an induction motor of 2.2 kW are shown to verify the practicability of this device
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KohataMasakazu en-aut-sei=Kohata en-aut-mei=Masakazu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Toyo Electric Manufacturing Company Limited, Kanagawa en-keyword=circuit resonance kn-keyword=circuit resonance en-keyword=induction motors kn-keyword=induction motors en-keyword=invertors kn-keyword=invertors en-keyword=pulse width modulation kn-keyword=pulse width modulation en-keyword=switching circuits kn-keyword=switching circuits END start-ver=1.4 cd-journal=joma no-vol=32 cd-vols= no-issue=2 article-no= start-page=279 end-page=286 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=19964 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Pulse-density-modulated power control of a 4 kW, 450 kHz voltage-source inverter for induction melting applications en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a 4 kW, 450 kHz voltage-source inverter with a series resonant circuit for induction melting applications, which is characterized by the power control based on pulse density modulation (PDM). The pulse-density-modulated inverter makes an induction melting system simple and compact, thus leading to higher efficiency. A modulation strategy is proposed to realize the induction melting system capable of operation at the frequency and power level of interest. Some interesting experimental results are shown to verify the validity of the concept
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=SanoK. en-aut-sei=Sano en-aut-mei=K. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=LeonardR. H. en-aut-sei=Leonard en-aut-mei=R. H. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Sekisui Chemical Corporation Limited affil-num=4 en-affil= kn-affil=J. F. Jelenko & Corporation en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=induction heating kn-keyword=induction heating en-keyword=melting kn-keyword=melting en-keyword=power control kn-keyword=power control en-keyword=pulse modulation kn-keyword=pulse modulation en-keyword=resonant power convertors kn-keyword=resonant power convertors END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=406 end-page=409 dt-received= dt-revised= dt-accepted= dt-pub-year=2003 dt-pub=200311 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Improvement of detectability for CMOS floating gate defects in supply current test en-subtitle= kn-subtitle= en-abstract= kn-abstract=We already proposed a supply current test method for detecting floating gate defects in CMOS ICs. In the method, increase of the supply current caused by defects is promoted by superposing a sinusoidal signal on the supply voltage. In this study, we propose one way to improve detectability of the method for the defects. They are detected by analyzing the frequency of supply current and judging whether secondary harmonics of the sinusoidal signal exist or not. Effectiveness of our way is confirmed by some experiments.
en-copyright= kn-copyright= en-aut-name=MichinishiHiroyuki en-aut-sei=Michinishi en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=YokohiraTokumi en-aut-sei=Yokohira en-aut-mei=Tokumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OkamotoTakuji en-aut-sei=Okamoto en-aut-mei=Takuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KobayashiToshifumi en-aut-sei=Kobayashi en-aut-mei=Toshifumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=HondoTsutomu en-aut-sei=Hondo en-aut-mei=Tsutomu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University of Science affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University of Science affil-num=4 en-affil= kn-affil=Mitsubishi Electric Company Limited affil-num=5 en-affil= kn-affil=Sharp Takaya Electronics Industry Company Limited en-keyword=CMOS logic circuits kn-keyword=CMOS logic circuits en-keyword=built-in self test kn-keyword=built-in self test en-keyword=equivalent circuits kn-keyword=equivalent circuits en-keyword=integrated circuit testing kn-keyword=integrated circuit testing en-keyword=logic testing kn-keyword=logic testing END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue= article-no= start-page=1547 end-page=1533 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19976 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An active circuit for cancellation of common-mode voltage generated by a PWM inverter en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper proposes an “active common-noise canceler (ACC)” that is capable of eliminating the common-mode voltage produced by a PWM inverter. An emitter follower using complementary transistors and a common-mode transformer are incorporated into the ACC, the design method of which is also presented in detail. A prototype ACC designed and constructed in this paper verifies the viability and effectiveness in a 3.7 kW induction motor drive using an IGBT inverter. Some experimental results show that the ACC makes significant contributions to reducing ground current and conducted EMI. In addition, the ACC can prevent electric shock on a ungrounded motor frame and can suppress motor shaft voltage
en-copyright= kn-copyright= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AyanoHideki en-aut-sei=Ayano en-aut-mei=Hideki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=PWM invertors kn-keyword=PWM invertors en-keyword=active networks kn-keyword=active networks en-keyword=bipolar transistor switches kn-keyword=bipolar transistor switches en-keyword=electromagnetic compatibility kn-keyword=electromagnetic compatibility en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=insulated gate bipolar transistors kn-keyword=insulated gate bipolar transistors en-keyword=power bipolar transistors kn-keyword=power bipolar transistors en-keyword=power semiconductor switches kn-keyword=power semiconductor switches en-keyword=power transformers kn-keyword=power transformers en-keyword=switching circuits kn-keyword=switching circuits END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=1991 dt-pub=199110 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Design strategy for the combined system of shunt passive and series active filters en-subtitle= kn-subtitle= en-abstract= kn-abstract=A design strategy for the combined power filter for a three-phase twelve-pulse thyristor rectifier is proposed. The shunt passive filter, which can minimize the output voltage of the series active filter, is designed and tested in a prototype model. A specially designed shunt passive filter makes it possible to reduce the required rating of the series active filter to 60% compared with a conventional shunt passive filter
en-copyright= kn-copyright= en-aut-name=FujitaHideki en-aut-sei=Fujita en-aut-mei=Hideki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=active filters kn-keyword=active filters en-keyword=passive filters kn-keyword=passive filters en-keyword=rectifying circuits kn-keyword=rectifying circuits en-keyword=thyristor applications kn-keyword=thyristor applications END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=304 end-page=307 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=20063 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A LECCS model parameter optimization algorithm for EMC designs of IC/LSI systems en-subtitle= kn-subtitle= en-abstract= kn-abstract=<p>In this paper, we propose a parameter optimization algorithm for EMC macro-modeling of IC/LSI power currents called the LECCS (linear equivalent circuit and current source) model. The unnecessary electro-magnetic wave from a digital electronics device may cause the electromagnetic interference (EMI) to other apparatus. Thus, its reduction has been regarded as one of the highest priority issues in digital electronics device designs. In order to accurately simulate high-frequency currents from power-supply sources that are the primary sources of EMI, the LECCS model has been proposed as a linear macromodel of a power-supply circuit. A LECCS model consists of multiple RLC-series circuits in parallel to represent the equivalent circuit between the voltage source and the ground. Given a set of measured impedances at various frequencies, our proposed algorithm first finds the number of RLC-series circuits corresponding to the number of valleys. Then, it searches optimal values of RLC parameters by a local search method. The effectiveness of our algorithm is verified through applications to a real system, where the accuracy and the required processing time by our algorithm are compared with the conventional method.</p>
en-copyright= kn-copyright= en-aut-name=FunabikiNobuo en-aut-sei=Funabiki en-aut-mei=Nobuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NomuraYohei en-aut-sei=Nomura en-aut-mei=Yohei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KawashimaJun en-aut-sei=Kawashima en-aut-mei=Jun kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=MinamisawaYuichiro en-aut-sei=Minamisawa en-aut-mei=Yuichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=WadaOsami en-aut-sei=Wada en-aut-mei=Osami kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=kyoto University en-keyword=RLC circuits kn-keyword=RLC circuits en-keyword=electromagnetic compatibility kn-keyword=electromagnetic compatibility en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=equivalent circuits kn-keyword=equivalent circuits en-keyword=integrated circuit design kn-keyword=integrated circuit design en-keyword=large scale integration kn-keyword=large scale integration en-keyword=linear network analysis kn-keyword=linear network analysis END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue= article-no= start-page=1393 end-page=1399 dt-received= dt-revised= dt-accepted= dt-pub-year=1998 dt-pub=199810 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A shunt active filter based on voltage detection for harmonic termination of a radial power distribution line en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper is focused on a shunt active filter based on detection of harmonic voltages at the point of installation. The objective of the active filter is to attenuate harmonic propagation resulting from series/parallel resonance between capacitors for power factor correction and line inductors in a power distribution line. The active filter acts as a low resistor to the external circuit for harmonic frequencies, and it is installed on the end bus of the power distribution line, just like a 50 Ω terminator installed on the end terminal of a signal transmission line. Therefore, the function of the active filter is referred to as “harmonic termination” in this paper. Experimental results obtained from a laboratory system rated at 200 V and 20 kW verify that the active filter for the purpose of harmonic termination has the capability of harmonic damping throughout the power distribution line
en-copyright= kn-copyright= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=WadaKeiji en-aut-sei=Wada en-aut-mei=Keiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=active filters kn-keyword=active filters en-keyword=power distribution lines kn-keyword=power distribution lines en-keyword=power factor correction kn-keyword=power factor correction en-keyword=power harmonic filters kn-keyword=power harmonic filters en-keyword=power system harmonics kn-keyword=power system harmonics END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue= article-no= start-page=1482 end-page=1488 dt-received= dt-revised= dt-accepted= dt-pub-year=2000 dt-pub=200010 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Circuit configurations and performance of the active common-noise canceler for reduction of common-mode voltage generated by voltage-source PWM inverters en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper discusses two different circuit configurations of the active common-noise canceler (ACC) which has been proposed by the authors. One is characterized by its DC power supply isolated from the DC link of a PWM inverter. The configuration makes it possible to integrate the ACC with a medium-voltage PWM inverter. The other compensates a partial frequency component of the common-mode voltage. The purpose is not to achieve complete cancellation, but to restrict only a slope in a change of the common-mode voltage applied to an AC motor. As a result, the core size of the common-mode transformer used in the ACC becomes considerably small. Experimental results show good effects of the proposed active circuits on both ground current and conducted EMI
en-copyright= kn-copyright= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Tokyo Institute of Technology en-keyword=PWM invertors kn-keyword=PWM invertors en-keyword=active networks kn-keyword=active networks en-keyword=compensation kn-keyword=compensation en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=interference suppression kn-keyword=interference suppression en-keyword=power supplies to apparatus kn-keyword=power supplies to apparatus en-keyword=transformer cores kn-keyword=transformer cores en-keyword=transformers kn-keyword=transformers END start-ver=1.4 cd-journal=joma no-vol=32 cd-vols= no-issue=5 article-no= start-page=1105 end-page=1114 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=199610 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Modeling and damping of high-frequency leakage currents in PWM inverter-fed AC motor drive systems en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents an equivalent circuit for high-frequency leakage currents in pulsewidth modulation (PWM) inverter-fed AC motors, which forms a series resonant circuit. The analysis based on the equivalent circuit leads to such a conclusion that the connection of a conventional common-mode choke or reactor in series between the AC terminals of a PWM inverter and those of an AC motor is not effective to reduce the rms and average values of the leakage current, but effective to reduce the peak value. Furthermore, this paper proposes a common-mode transformer which is different in damping principle from the conventional common-mode choke. It is shown theoretically and experimentally that the common-mode transformer is able to reduce the rms value of the leakage current to 25%, where the core used in the common-mode transformer is smaller than that of the conventional common-mode choke
en-copyright= kn-copyright= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=AC motor drives kn-keyword=AC motor drives en-keyword=PWM invertors kn-keyword=PWM invertors en-keyword=circuit resonance kn-keyword=circuit resonance en-keyword=damping kn-keyword=damping en-keyword=equivalent circuits kn-keyword=equivalent circuits en-keyword=inductors kn-keyword=inductors en-keyword=leakage currents kn-keyword=leakage currents en-keyword=resonance kn-keyword=resonance en-keyword=transformers kn-keyword=transformers END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue= article-no= start-page=1000 end-page=1006 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19976 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An approach to a broad range of power control in voltage-source series-resonant inverters for corona discharge treatment-pulse-density-modulation en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper implements a wide range of power control with pulse-density-modulation (PDM) in a voltage source series-resonant inverter which realizes a corona discharge for the surface treatment of films. The use of the PDM inverter enables the employment of a three-phase diode bridge rectifier as an electric utility interface. The PDM inverter produces either a square-wave AC voltage state or a zero voltage state at its AC terminals to control the discharge power of a corona surface treater. Moreover, it can achieve zero-current-switching (ZCS) and zero-voltage-switching (ZVS) under all the operating conditions, thus leading to a significant reduction of switching losses and electromagnetic noise. A 80 kHz, 6 kW surface treatment system consisting of a voltage-source PDM inverter, a step-up transformer and a corona discharge treater shows the establishment of a stable corona discharge in an extremely wide range of power control from 0.5 to 100 %, and therefore succeeds in performing both strong and weak surface treatment processes for films
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=OgasawaraSatoshi en-aut-sei=Ogasawara en-aut-mei=Satoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=corona kn-keyword=corona en-keyword=invertors kn-keyword=invertors en-keyword=power transformers kn-keyword=power transformers en-keyword=resonant power kn-keyword=resonant power en-keyword=convertors kn-keyword=convertors en-keyword=surface treatment kn-keyword=surface treatment en-keyword=switching circuits kn-keyword=switching circuits END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue= article-no= start-page=10 end-page=15 dt-received= dt-revised= dt-accepted= dt-pub-year=2003 dt-pub=20038 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Modeling of gapped power bus structures for isolation using cavity modes en-subtitle= kn-subtitle= en-abstract= kn-abstract=Power bus resonance characteristics of a gapped power-plane with a slit and a split power-plane with a gap were studied, using a fast algorithm based on a full cavity-mode resonator model and the segmentation method. Inductance and capacitance models were used to account for a field coupling along the slit and across the gap, respectively. Good agreements between the calculated and measured results were found to demonstrate the effectiveness and accuracy of our fast algorithm and the segmentation method, as well as the inductance model for the slit and the capacitance model for the gap.
en-copyright= kn-copyright= en-aut-name=WangZhi Liang en-aut-sei=Wang en-aut-mei=Zhi Liang kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=WadaOsami en-aut-sei=Wada en-aut-mei=Osami kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name=古賀隆治 kn-aut-sei=古賀 kn-aut-mei=隆治 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=cavity resonators kn-keyword=cavity resonators en-keyword=printed circuit design kn-keyword=printed circuit design END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=73 end-page=76 dt-received= dt-revised= dt-accepted= dt-pub-year=2003 dt-pub=200311 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of resonance characteristics of a power bus with rectangle and triangle elements in multilayer PCBs en-subtitle= kn-subtitle= en-abstract= kn-abstract=One of the major sources of radiated EMI is attributed to power bus resonance in a printed circuit board (PCB). A fast algorithm, combined with the segmentation method, is applied for calculating resonance characteristics of a power bus whose pattern consists of several segments of rectangles and/or right-angled triangles. Good agreement between the calculated and measured results demonstrates the usefulness and accuracy of the fast algorithm and the segmentation method.
en-copyright= kn-copyright= en-aut-name=WangZhi Liang en-aut-sei=Wang en-aut-mei=Zhi Liang kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=WadaOsami en-aut-sei=Wada en-aut-mei=Osami kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ToyotaYoshitaka en-aut-sei=Toyota en-aut-mei=Yoshitaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name=古賀隆治 kn-aut-sei=古賀 kn-aut-mei=隆治 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University en-keyword=S-matrix theory kn-keyword=S-matrix theory en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=impedance matrix kn-keyword=impedance matrix en-keyword=printed circuits kn-keyword=printed circuits en-keyword=resonance kn-keyword=resonance END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=6 article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=199911 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A 2-MHz 6-kVA voltage-source inverter using low-profile MOSFET modules for low-temperature plasma generators en-subtitle= kn-subtitle= en-abstract= kn-abstract=<p>This paper presents a 2-MHz 6-kVA voltage-source inverter for low-temperature plasma generators. A new MOSFET module referred to as a “mega pack” is specially designed and fabricated for high-frequency high-power applications. It has a low-profile package equipped with four terminal plates. The main circuit consists of a single-phase full-bridge inverter using the four new modules. The layout of the modules is characterized by two modules, which are placed back-to-back with each other, forming a half bridge. Both device and circuit designs achieve great reduction of stray inductance in the main circuit. A prototype inverter shows stable operation around frequencies as high as 2 MHz.</p>
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ShinoharaShin-ichi en-aut-sei=Shinohara en-aut-mei=Shin-ichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=bridge circuits kn-keyword=bridge circuits en-keyword=inductance kn-keyword=inductance en-keyword=invertors kn-keyword=invertors en-keyword=plasma devices kn-keyword=plasma devices en-keyword=plasma production kn-keyword=plasma production en-keyword=power MOSFET kn-keyword=power MOSFET END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=304 end-page=307 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=20063 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A LECCS model parameter optimization algorithm for EMC designs of IC/LSI systems en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, we propose a parameter optimization algorithm for EMC macro-modeling of IC/LSI power currents called the LECCS (linear equivalent circuit and current source) model. The unnecessary electro-magnetic wave from a digital electronics device may cause the electromagnetic interference (EMI) to other apparatus. Thus, its reduction has been regarded as one of the highest priority issues in digital electronics device designs. In order to accurately simulate high-frequency currents from power-supply sources that are the primary sources of EMI, the LECCS model has been proposed as a linear macromodel of a power-supply circuit. A LECCS model consists of multiple RLC-series circuits in parallel to represent the equivalent circuit between the voltage source and the ground. Given a set of measured impedances at various frequencies, our proposed algorithm first finds the number of RLC-series circuits corresponding to the number of valleys. Then, it searches optimal values of RLC parameters by a local search method. The effectiveness of our algorithm is verified through applications to a real system, where the accuracy and the required processing time by our algorithm are compared with the conventional method.
en-copyright= kn-copyright= en-aut-name=FunabikiNobuo en-aut-sei=Funabiki en-aut-mei=Nobuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NomuraYohei en-aut-sei=Nomura en-aut-mei=Yohei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KawashimaJun en-aut-sei=Kawashima en-aut-mei=Jun kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=MinamisawaYuichiro en-aut-sei=Minamisawa en-aut-mei=Yuichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=WadaOsami en-aut-sei=Wada en-aut-mei=Osami kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Kyoto University en-keyword=RLC circuits kn-keyword=RLC circuits en-keyword=electromagnetic compatibility kn-keyword=electromagnetic compatibility en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=equivalent circuits kn-keyword=equivalent circuits en-keyword=integrated circuit design kn-keyword=integrated circuit design en-keyword=large scale integration kn-keyword=large scale integration en-keyword=linear network analysis kn-keyword=linear network analysis END start-ver=1.4 cd-journal=joma no-vol=35 cd-vols= no-issue=1 article-no= start-page=21 end-page=27 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=19992 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A 2-MHz 2-kW voltage-source inverter for low-temperature plasma generators: implementation of fast switching with a third-order resonant circuit en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a specially designed third-order resonant circuit intended to achieve fast switching operation for a voltage-source series-resonant inverter using four MOSFETs. The third-order resonant current superimposed on a sinusoidal load current helps to quickly charge or discharge the output capacitance of each MOSFET. This results not only in a reduction of the commutation period which is required to turn the MOSFET on and off, but also in an improvement of the displacement factor at the output of the inverter. Moreover, the third-order resonant circuit acts as a low-pass filter to suppress the parasitic oscillation between line inductance and stray capacitance. The viability and effectiveness of the third-order resonant circuit is verified by a 2 MHz 2 kW prototype inverter developed for a low-temperature plasma generator
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=invertors kn-keyword=invertors en-keyword=plasma production kn-keyword=plasma production en-keyword=power MOSFET kn-keyword=power MOSFET en-keyword=power kn-keyword=power en-keyword=semiconductor switches kn-keyword=semiconductor switches en-keyword=resonant power convertors kn-keyword=resonant power convertors en-keyword=switching circuits kn-keyword=switching circuits END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=1396 end-page=1404 dt-received= dt-revised= dt-accepted= dt-pub-year=2000 dt-pub=200010 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A practical approach to switching-loss reduction in a large-capacity static VAr compensator based on voltage-source inverters en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents a simple method for reduction of switching and snubbing losses in a large-capacity static VAr compensator (SVC) consisting of multiple three-phase voltage-source square-wave inverters. The proposed method is characterized by a “commutation capacitor” connected in parallel with each switching device. The commutation capacitor allows the SVC to perform zero-voltage switching, and to reduce switching losses. The electric charge stored in the commutation capacitor is not dissipated, but regenerated to the DC-link capacitor. Moreover, a soft-starting method for the SVC is also presented to avoid forming a short circuit across the commutation capacitor during startup. Experimental results obtained from a 10 kVAr laboratory setup are shown to verify the viability of the operating principle of the commutation capacitor
en-copyright= kn-copyright= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TominagaShinji en-aut-sei=Tominaga en-aut-mei=Shinji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=DC-AC power convertors kn-keyword=DC-AC power convertors en-keyword=commutation kn-keyword=commutation en-keyword=compensation kn-keyword=compensation en-keyword=invertors kn-keyword=invertors en-keyword=losses kn-keyword=losses en-keyword=power capacitors kn-keyword=power capacitors en-keyword=reactive power kn-keyword=reactive power en-keyword=static VAr compensators kn-keyword=static VAr compensators en-keyword=switching circuits kn-keyword=switching circuits END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=775 end-page=778 dt-received= dt-revised= dt-accepted= dt-pub-year=2002 dt-pub=20025 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Application of segmentation method to analysis of power/ground plane resonance in multilayer PCBs en-subtitle= kn-subtitle= en-abstract= kn-abstract=The fast algorithm developed for calculating the resonant characteristics of the power/ground planes in multilayer PCBs, is extended to the case of that the pattern of the power/ground planes consists of several "segments" of rectangles, using the so-called segmentation method. Good agreements between the calculated and measured results have demonstrated the usefulness and accuracy of our fast algorithm and the segmentation method.
en-copyright= kn-copyright= en-aut-name=WangZhi Liang en-aut-sei=Wang en-aut-mei=Zhi Liang kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=WadaOsami en-aut-sei=Wada en-aut-mei=Osami kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ToyotaYoshitaka en-aut-sei=Toyota en-aut-mei=Yoshitaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name=古賀隆治 kn-aut-sei=古賀 kn-aut-mei=隆治 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University en-keyword=circuit resonance kn-keyword=circuit resonance en-keyword=electromagnetic interference kn-keyword=electromagnetic interference en-keyword=printed circuit design kn-keyword=printed circuit design END start-ver=1.4 cd-journal=joma no-vol=35 cd-vols= no-issue=3 article-no= start-page=638 end-page=645 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=19996 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A shunt active filter based on voltage detection for harmonic termination of a radial power distribution line en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper focuses on a shunt active filter based on the detection of harmonic voltages at the point of installation. The objective of the active filter is to attenuate harmonic propagation resulting from series/parallel resonance between capacitors for power factor correction and line inductors in a power distribution line. The active filter acts as a low resistor to the external circuit for harmonic frequencies, and it is installed on the end bus of the power distribution line, just like a 50 Ω terminator installed on the end terminal of a signal transmission line. Therefore, the function of the active filter is referred to as “harmonic termination” in this paper. Experimental results obtained from a laboratory system rated at 200 V and 20 kW verify that the active filter for the purpose of harmonic termination has the capability of harmonic damping throughout the power distribution line
en-copyright= kn-copyright= en-aut-name=AkagiHirofumi en-aut-sei=Akagi en-aut-mei=Hirofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=FujitaHideaki en-aut-sei=Fujita en-aut-mei=Hideaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=WadaKeiji en-aut-sei=Wada en-aut-mei=Keiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=active filters kn-keyword=active filters en-keyword=harmonic distortion kn-keyword=harmonic distortion en-keyword=power distribution lines kn-keyword=power distribution lines en-keyword=power harmonic filters kn-keyword=power harmonic filters en-keyword=power system harmonics kn-keyword=power system harmonics END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=19960604 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A new position sensor for high-speed measurement of multiple points en-subtitle= kn-subtitle= en-abstract= kn-abstract=A high-speed measuring system of multiple points is becoming an important issue in many industrial applications. Therefore, the development of a high-speed position sensor is an important issue. However, conventional sensors such as CCD(charge-coupled device) and PSD(position-sensitive detector) are insufficient to apply to the high-speed measurement of multiple points. We propose a new position sensor for high-speed measurement of multiple points. The proposed sensor features a single scanning detecting method of multiple points by parallel processing technique and design of the sensor by analog circuitry, which makes high-speed measurement of multiple points possible. The designed sensor system realizes both high-speed performance and high accuracy
en-copyright= kn-copyright= en-aut-name=BabaMitsuru en-aut-sei=Baba en-aut-mei=Mitsuru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KonishiTadataka en-aut-sei=Konishi en-aut-mei=Tadataka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=HoriYuko en-aut-sei=Hori en-aut-mei=Yuko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=OtaniKouji en-aut-sei=Otani en-aut-mei=Kouji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama Univeristy affil-num=4 en-affil= kn-affil=Okayama University en-keyword=analogue integrated circuits kn-keyword=analogue integrated circuits en-keyword=computerised instrumentation kn-keyword=computerised instrumentation en-keyword=electric sensing devices kn-keyword=electric sensing devices en-keyword=parallel kn-keyword=parallel en-keyword=processing kn-keyword=processing en-keyword=peak detectors kn-keyword=peak detectors en-keyword=position measurement kn-keyword=position measurement en-keyword=signal processing kn-keyword=signal processing en-keyword=signal processing kn-keyword=signal processing en-keyword=equipment kn-keyword=equipment END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue= article-no= start-page=191 end-page=196 dt-received= dt-revised= dt-accepted= dt-pub-year=2002 dt-pub=200212 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Detection of defects at BGA solder joints by using X-ray imaging en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the surface mount technology, a ball grid array (BGA) has been used in the production of PC boards. This paper deals with the detection of defects at BGA solder joints in PC boards by using X-ray imaging. Types of defects at BGA solder joints are solder bridge, missing connection, solder voids, open connection and misregistration of parts. The problems of image analysis for the detection of defects at BGA solder joints are the detection accuracy and image processing time according to the speed of the production line. To get the design data for the development of the inspection system used in the surface mount process, it is important to develop image analysis techniques based on X-ray image data. At the first step of our study, we attempt to detect the characteristics of the solder bridges based on the image analysis technique.
en-copyright= kn-copyright= en-aut-name=SumimotoTetsuhiro en-aut-sei=Sumimoto en-aut-mei=Tetsuhiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MaruyamaToshinori en-aut-sei=Maruyama en-aut-mei=Toshinori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AzumaYoshiharu en-aut-sei=Azuma en-aut-mei=Yoshiharu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=GotoSachiko en-aut-sei=Goto en-aut-mei=Sachiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MondouMunehiro en-aut-sei=Mondou en-aut-mei=Munehiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=FurukawaNoboru en-aut-sei=Furukawa en-aut-mei=Noboru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=OkadaSaburo en-aut-sei=Okada en-aut-mei=Saburo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Eastem Hiroshima Prefecture Industrial Research Institute affil-num=6 en-affil= kn-affil=Eastern Hiroshima Prefecture Industrial Research Institute affil-num=7 en-affil= kn-affil=National Institute of Advanced Industrial Science and Technology en-keyword=X-ray imaging kn-keyword=X-ray imaging en-keyword=ball grid arrays kn-keyword=ball grid arrays en-keyword=inspection kn-keyword=inspection en-keyword=printed circuit manufacture kn-keyword=printed circuit manufacture en-keyword=quality control kn-keyword=quality control en-keyword=surface mount technology kn-keyword=surface mount technology END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue= article-no= start-page=1131 end-page=1136 dt-received= dt-revised= dt-accepted= dt-pub-year=2003 dt-pub=20035 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Development of image analysis for detection of defects of BGA by using X-ray images en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the surface mount technology, Ball Grid Array (BGA) has been used in a production of PC boards, because of their excellent characters such as high density of the lead pin pitch, better lead rigidity and self-alignment during re-flow processing. This paper deals with the development of image analysis for the detection of defects at BGA solder joints in PC boards by using X-ray images. In the conventional IC boards, it is possible to detect defects of solder joints by visual inspection, because the lead of IC package is set on its outside. However, we can't detect visually defects at BGA solder joints, because they are hidden under the IC package. In a production line, the inspection of BGA in PC boards depends on the function test of electric circuits in the final process. To improve a cost performance and the reliability of PC boards, an inspection of BGA is required in the surface mount process. Types of defects at BGA solder joints are solder bridge, missing connection, solder voids, open connection and miss-registration of parts. As we can find mostly solder bridge in these defects, we pick up this to detect solder bridge in a production line. The problems of image analysis for the detection of defects at BGA solder joints are the detection accuracy and image processing time according to a line speed of production. To get design data for the development of the inspection system, which can be used easily in the surface mount process, it is important to develop image analysis techniques based on X-ray image data. At the first step of our study, we attempt to detect the characteristic of the solder bridges based on an image analysis.
en-copyright= kn-copyright= en-aut-name=SumimotoTetsuhiro en-aut-sei=Sumimoto en-aut-mei=Tetsuhiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MaruyamaToshinori en-aut-sei=Maruyama en-aut-mei=Toshinori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AzumaYoshiharu en-aut-sei=Azuma en-aut-mei=Yoshiharu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=GotoSachiko en-aut-sei=Goto en-aut-mei=Sachiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MondouMunehiro en-aut-sei=Mondou en-aut-mei=Munehiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=FurukawaNoboru en-aut-sei=Furukawa en-aut-mei=Noboru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=OkadaSaburo en-aut-sei=Okada en-aut-mei=Saburo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Eastern Hiroshima Prefecture Industrial Research Institute affil-num=6 en-affil= kn-affil=Eastern Hiroshima Prefecture Industrial Research Institute affil-num=7 en-affil= kn-affil=National Institute of Advanced Industrial Science and Technology en-keyword=X-ray imaging kn-keyword=X-ray imaging en-keyword=ball grid arrays kn-keyword=ball grid arrays en-keyword=image processing kn-keyword=image processing en-keyword=inspection kn-keyword=inspection en-keyword=printed circuit manufacture kn-keyword=printed circuit manufacture en-keyword=quality control kn-keyword=quality control en-keyword=surface mount technology kn-keyword=surface mount technology END start-ver=1.4 cd-journal=joma no-vol=18 cd-vols= no-issue=3 article-no= start-page=153 end-page=171 dt-received= dt-revised= dt-accepted= dt-pub-year=1964 dt-pub=196406 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effects of brainstem and subcortical lesions on corticogenic epileptic convulsion with special reference to Forel h-field en-subtitle= kn-subtitle= en-abstract= kn-abstract=An experimental study was attempted to make an analysis of the subcortical and brain stem lesion effect on the Metrazol-induced corticogenic epileptic convulsion based on EEG-discharge and EMG-convulsion as indicators. utilizing 42 adult cats. 1. A definite threshold increment of eliciting the seizure was found in the case of bilateral lesion of the Forel H-field. In contrast to it, no variation in the threshold was found in the case of the lesions at the other parts of brain stem, thalamus, red nucleus and its neighborhood, and lenticular nucleus. 2. There was a parallel relation between EEG discharge and convulsion. Dissociation could be obtained in none of the cases. 3. It is, therefore, to be concluded that the Forel H-field is composed of the main axis of cortico-subcortical reverberating circuit and that the lesion causes a decrement of the excitability at cortex and an inhibition of the corticogenic epileptic convulsion.
en-copyright= kn-copyright= en-aut-name=MukawaJiro en-aut-sei=Mukawa en-aut-mei=Jiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Okayama University END start-ver=1.4 cd-journal=joma no-vol=15 cd-vols= no-issue=5 article-no= start-page=335 end-page=344 dt-received= dt-revised= dt-accepted= dt-pub-year=1961 dt-pub=196110 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Studies on respiratory humidity. II. Humidity in anesthetic circuits and water loss via anesthesia systems en-subtitle= kn-subtitle= en-abstract= kn-abstract=Through the use of an automatic photo tube dew-point hygrometer, the author succeeded in measuring dew point of gas flows continuously in anesthetic circuits. Simultaneous thermometries were done on the nasal or oral mucosa, on the respiratory gas flows in the anesthetic mask or the endotracheal tube, and on the gas in the inhaling conduit. Experiments were performed on ten adults patients undergoing various types of surgery under general inhalation anesthesia. Anesthetic technics were varied intentionally during the measurements. Thus, both absolute and relative humidities of exhaled and inhaled gases, and respiratory water and heat losses were calculated under various anesthetic conditions, and physiological and clinical considerations were discussed. The conclusions obtained from this research are as follows: (1) When a non-rebreathing system is applied, moisture content of exhaled gas is minimal, and respiratory losses of both water and heat are maximum. With a semi-closed circle method, according to decreasing fresh gas flows, the humidity of the inspiratory and expiratory gases becomes higher, and both heat and water losses through respiration are lessened. When a closed circle method, with carbon dioxide absorption, is employed, temperature and humidity of gas in the inhaling conduit are highest, and the expired gas offers the maximum temperature and moisture contenL Both water and heat losses from anesthesia become minimal when administered in a closed system. (2) While the water and heat that a patient loses through respiration increase with increasing breathing capacity, they are still small parts of the total water and heat losses of the patient. Water and heat losses via anesthesia systems are not so predominant in maintaining water balance and heat regulation of patients during anesthesia and surgery.
en-copyright= kn-copyright= en-aut-name=SatoToru en-aut-sei=Sato en-aut-mei=Toru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=Okayama University END start-ver=1.4 cd-journal=joma no-vol=19 cd-vols= no-issue=4 article-no= start-page=209 end-page=215 dt-received= dt-revised= dt-accepted= dt-pub-year=1965 dt-pub=196508 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Physical analysis of the energy transducing reaction in mitochondria en-subtitle= kn-subtitle= en-abstract= kn-abstract=As is generally known, the energy transducing reaction in mitochondria is of highly complicated one. Free energy produced by transferring electrons from substrate to oxygen, where many dehydrogenases and respiratory chain of mitochondria are concerned, is transduced to ATP formation or utilized for the ion accmulation reaction, synthesis of various substances, reversal electron transport and the mechanochemical changes of mitochondria. The mechanism of these energy trasducing reactions which is supposed to be closely related with each other, has not yet been clarified. The authors tried to solve these biological energy transducing mechnism by applying physical circuit theory in electronics and elucidate that the energy transduction occurring in mitochondria can be explained theoretically. And some unknown but possible reaction have been postulated from such a physical consideration.
en-copyright= kn-copyright= en-aut-name=ItoNobutaka en-aut-sei=Ito en-aut-mei=Nobutaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=UtsumiKozo en-aut-sei=Utsumi en-aut-mei=Kozo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NakatsukaAyako en-aut-sei=Nakatsuka en-aut-mei=Ayako kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SenoSatimaru en-aut-sei=Seno en-aut-mei=Satimaru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University END start-ver=1.4 cd-journal=joma no-vol=48 cd-vols= no-issue=2 article-no= start-page=93 end-page=99 dt-received= dt-revised= dt-accepted= dt-pub-year=1994 dt-pub=199404 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Correlation between the Layer of an Intimal Tear and the Progression of Aortic Dissection en-subtitle= kn-subtitle= en-abstract= kn-abstract=Thoracic aortas isolated from dogs were evaluated to determine the correlation between the depth of an intimal tear and the progression of aortic dissection. Thoracic aortas obtained from 99 adult mongrel dogs were used. An intimal tear (aortic pocket) was created on the aortic wall and the aorta was connected in series to a closed circuit (150 mmHg/100 mmHg and 60 beats/min). The progression of the dissection was most notable in the aortic pocket prepared in the first one-third of the external media (87.5%). There was no correlation however between the width of the pocket and the progression of dissection. Examinations of samples from surgical patients have shown that dissection usually progresses at the same site. This has been attributed to the diseased media. Our results demonstrated that dissection occurred almost always at the same site without any medial changes suggesting that whether dissection develops or not likely depends upon whether the intimal tear reaches the first one-third of the external media or not. en-copyright= kn-copyright= en-aut-name=MitsuiHideya en-aut-sei=Mitsui en-aut-mei=Hideya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=UchidaHatsuzo en-aut-sei=Uchida en-aut-mei=Hatsuzo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TeramotoShigeru en-aut-sei=Teramoto en-aut-mei=Shigeru kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Second Department of Surgery, Okayama University Medical School affil-num=2 en-affil= kn-affil=Second Department of Surgery, Okayama University Medical School affil-num=3 en-affil= kn-affil=Second Department of Surgery, Okayama University Medical School en-keyword=aortic dissection kn-keyword=aortic dissection en-keyword=pathogenesis kn-keyword=pathogenesis en-keyword=depth of intimal tear kn-keyword=depth of intimal tear en-keyword=medial degeneration kn-keyword=medial degeneration END start-ver=1.4 cd-journal=joma no-vol=62 cd-vols= no-issue=4 article-no= start-page=235 end-page=239 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=200808 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Experimental Study of a Novel Method of Cardiopulmonary Resuscitation Using a Combination of Percutaneous Cardiopulmonary Support and Liposome-encapsulated Hemoglobin (TRM645) en-subtitle= kn-subtitle= en-abstract= kn-abstract=Percutaneous cardiopulmonary support (PCPS) has been applied for cardiopulmonary arrest (CPA). We have developed a novel method of cardiopulmonary resuscitation using PCPS combined with liposome-encapsulated hemoglobin (TRM645) to improve oxygen delivery to vital organs. Ventricular fibrillation was electrically induced to an adult goat for 10 min. Next, PCPS (30 ml/kg/min, V/Q: 1) was performed for 20 min. Then, external defibrillation was attempted and observed for 120 min. The TRM group (n5) was filled with 300 mL of TRM645 for the PCPS circuit. The control group (n5) was filled with the same volume of saline. The delivery of oxygen (DO2) and oxygen consumption (VO2) decreased markedly by PCPS after CPA, compared to the preoperative values. DO2 was kept at a constant level during PCPS in both groups, but VO2 slowly decreased at 5, 10, and 15 min of PCPS in the control groups, demonstrating that systemic oxygen metabolism decreased with time. In contrast, the decreases in VO2 were small in the TRM group at 5, 10, and 15 min of PCPS, demonstrating that TRM645 continuously maintained systemic oxygen consumption even at a low flow rate. AST and LDH in the TRM group were lower than the control. There were significant differences at 120 min after the restoration of spontaneous circulation (p<0.05).
en-copyright= kn-copyright= en-aut-name=OtaKei en-aut-sei=Ota en-aut-mei=Kei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MizunoToshihide en-aut-sei=Mizuno en-aut-mei=Toshihide kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TatsumiEisuke en-aut-sei=Tatsumi en-aut-mei=Eisuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KatagiriNobumasa en-aut-sei=Katagiri en-aut-mei=Nobumasa kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TaenakaYoshiyuki en-aut-sei=Taenaka en-aut-mei=Yoshiyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=IshizukaTakanobu en-aut-sei=Ishizuka en-aut-mei=Takanobu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=OgataYoshitaka en-aut-sei=Ogata en-aut-mei=Yoshitaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=UjikeYoshihito en-aut-sei=Ujike en-aut-mei=Yoshihito kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= affil-num=1 en-affil= kn-affil=Department of Emergency Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=2 en-affil= kn-affil=Department of Artificial Organs, National Cardiovascular Center Research Institute affil-num=3 en-affil= kn-affil=Department of Artificial Organs, National Cardiovascular Center Research Institute affil-num=4 en-affil= kn-affil=Department of Artificial Organs, National Cardiovascular Center Research Institute affil-num=5 en-affil= kn-affil=Department of Artificial Organs, National Cardiovascular Center Research Institute affil-num=6 en-affil= kn-affil=Research and Development Center, Terumo Corporation affil-num=7 en-affil= kn-affil=Research and Development Center, Terumo Corporation affil-num=8 en-affil= kn-affil=Department of Emergency Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences en-keyword=percutaneous cardiopulmonary support kn-keyword=percutaneous cardiopulmonary support en-keyword=liposome-encapsulated hemoglobin kn-keyword=liposome-encapsulated hemoglobin en-keyword=cardiopulmonary resuscitation kn-keyword=cardiopulmonary resuscitation END start-ver=1.4 cd-journal=joma no-vol=60 cd-vols= no-issue=3 article-no= start-page=167 end-page=172 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=200606 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An experimental study on pumpless extracorporeal membrane oxygenation (ECMO) support in a canine model. en-subtitle= kn-subtitle= en-abstract= kn-abstract=This study was carried out to determine whether an extracorporeal membrane oxygenation (ECMO) support could be sufficiently conducted by the right ventricle alone from the viewpoint of the hemodynamics and blood gas state. Six infant dogs underwent a bypass between the left pulmonary artery and left atrium with an in-line oxygenator after a left pneumonectomy. Partial ECMO support was conducted simply by opening the circuit, and total ECMO support was conducted by ligating the right pulmonary artery. After the establishment of partial ECMO, approximately one-third of the right ventricular output was passively shunted through the bypass circuit, and the cardiac index and central venous pressure did not change. The mean pulmonary arterial pressures increased significantly. After a complete ligation of the right pulmonary artery, all 6 dogs survived for 12 h, but the cardiac output and blood pressure decreased significantly. The blood gas state was sufficiently maintained throughout the experiment. The results suggest the possibility of using the pumpless ECMO support. However, the flow resistance of the membrane oxygenator proved to still be too high for use in a total pumpless ECMO. Further studies on long-term ECMO and the development of a membrane oxygenator with a considerably low flow-resistance are needed.
en-copyright= kn-copyright= en-aut-name=TamesueKiyokazu en-aut-sei=Tamesue en-aut-mei=Kiyokazu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=IchibaShingo en-aut-sei=Ichiba en-aut-mei=Shingo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NawaSugato en-aut-sei=Nawa en-aut-mei=Sugato kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=ShimizuNobuyoshi en-aut-sei=Shimizu en-aut-mei=Nobuyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama Red Cross General Hospital affil-num=4 en-affil= kn-affil=Okayama University en-keyword=pumpless ECMO kn-keyword=pumpless ECMO en-keyword=implantable artificial lung kn-keyword=implantable artificial lung en-keyword=pulmonary bypass kn-keyword=pulmonary bypass END start-ver=1.4 cd-journal=joma no-vol=19 cd-vols= no-issue=6 article-no= start-page=2494 end-page=2497 dt-received= dt-revised= dt-accepted= dt-pub-year=1983 dt-pub=198311 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=New design method of permanent magnets by using the finite element method en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new method for determining the shapes and sizes of magnets which produce the prescribed flux densities by using the finite element method has been developed. In this paper, the new technique is explained briefly, and then the finite element formulation for non-linear analysis is derived. Finally, the usefulness of the technique is shown by applying this method to the design of magnetic circuits.
en-copyright= kn-copyright= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakahashiN. en-aut-sei=Takahashi en-aut-mei=N. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=FEM kn-keyword=FEM en-keyword= Finite-element method (FEM) kn-keyword= Finite-element method (FEM) en-keyword=Permanent magnet motors kn-keyword=Permanent magnet motors END start-ver=1.4 cd-journal=joma no-vol=24 cd-vols= no-issue=6 article-no= start-page=2591 end-page=2593 dt-received= dt-revised= dt-accepted= dt-pub-year=1988 dt-pub=198811 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Electromagnetic field analysis of RF antenna for MRI en-subtitle= kn-subtitle= en-abstract= kn-abstract=The design of an RF antenna for magnetic resonance imaging is reported. The point-matching formulation of the moment method was used to compute the electromagnetic field of the antenna and the current distribution on the antenna. To verify the computation accuracy of the moment method, computed and experimental results are compared. The effect of loading the RF antenna with capacitors to improve the uniformity of the current distribution has also been studied
en-copyright= kn-copyright= en-aut-name=TsuboiH. en-aut-sei=Tsuboi en-aut-mei=H. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TanakaH. en-aut-sei=Tanaka en-aut-mei=H. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=MisakiT. en-aut-sei=Misaki en-aut-mei=T. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=FujitaM. en-aut-sei=Fujita en-aut-mei=M. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Fuji Electric Corporate Research and Development, Limited en-keyword=antenna theory kn-keyword=antenna theory en-keyword=biomedical NMR kn-keyword=biomedical NMR en-keyword=circuit analysis computing kn-keyword=circuit analysis computing END start-ver=1.4 cd-journal=joma no-vol=24 cd-vols= no-issue=6 article-no= start-page=2582 end-page=2584 dt-received= dt-revised= dt-accepted= dt-pub-year=1988 dt-pub=198811 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=3-D Finite element method for analyzing magnetic fields in electrical machines excited from voltage sources en-subtitle= kn-subtitle= en-abstract= kn-abstract=A method for analyzing 3-D magnetic fields and currents in electrical machines excited from voltage sources has been developed. It was obtained by expanding the 2-D finite-element method into three dimensions, using the A φ method. The basic idea and the finite-element formulation are described. The effectiveness of the method is shown by some application examples
en-copyright= kn-copyright= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakahashiN. en-aut-sei=Takahashi en-aut-mei=N. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=FujiwaraK. en-aut-sei=Fujiwara en-aut-mei=K. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=AhagonAkira en-aut-sei=Ahagon en-aut-mei=Akira kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University en-keyword=finite element analysis kn-keyword=finite element analysis en-keyword=machine theory kn-keyword=machine theory en-keyword=magnetic circuits kn-keyword=magnetic circuits END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=1989 dt-pub=19893 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Optimal design method of 3-D nonlinear magnetic circuit by using magnetization integral equation method en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel method for determining the sizes of iron parts in a magnetic circuit, which preserves the requirement of prescribed flux densities, has been developed. In order to take into account the nonlinear characteristics of iron, the magnetization integral equation method is used in the analysis. The effectiveness of the method is examined by applying it to the pole shape of an electromagnet. The developed software was verified by comparing calculated results with measured ones
en-copyright= kn-copyright= en-aut-name=TakahashiNorio en-aut-sei=Takahashi en-aut-mei=Norio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=UchiyamaN. en-aut-sei=Uchiyama en-aut-mei=N. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=CAD kn-keyword=CAD en-keyword=electromagnets kn-keyword=electromagnets en-keyword=magnetic circuits kn-keyword=magnetic circuits en-keyword=magnetic cores kn-keyword=magnetic cores END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue= article-no= start-page=4 end-page=9 dt-received= dt-revised= dt-accepted= dt-pub-year=2003 dt-pub=20038 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=High-speed simulation of PCB emission and immunity with frequency-domain IC/LSI source models en-subtitle= kn-subtitle= en-abstract= kn-abstract=Some recent results from research conducted in the EMC group at Okayama University are reviewed. A scheme for power-bus modeling with an analytical method is introduced. A linear macro-model for ICs/LSIs, called the LECCS model, has been developed for EMI and EMS simulation. This model has a very simple structure and is sufficiently accurate. Combining the LECCS model with analytical simulation techniques for power-bus resonance simulation provides a method for high-speed EMI simulation and decoupling evaluation related to PCB and LSI design. A useful explanation of the common-mode excitation mechanism, which utilizes the imbalance factor of a transmission line, is also presented. Some of the results were investigated by implementing prototypes of a high-speed EMI simulator, HISES.
en-copyright= kn-copyright= en-aut-name=WadaOsami en-aut-sei=Wada en-aut-mei=Osami kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=WangZhi Liang en-aut-sei=Wang en-aut-mei=Zhi Liang kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=WatanabeTetsushi en-aut-sei=Watanabe en-aut-mei=Tetsushi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=FukumotoYukihiro en-aut-sei=Fukumoto en-aut-mei=Yukihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=ShibataOsamu en-aut-sei=Shibata en-aut-mei=Osamu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=TakahashiEiji en-aut-sei=Takahashi en-aut-mei=Eiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=OsakaHideki en-aut-sei=Osaka en-aut-mei=Hideki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=MatsunagaShigeki en-aut-sei=Matsunaga en-aut-mei=Shigeki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Industrial Technology Center of Okayama Prefecture affil-num=4 en-affil= kn-affil=Matsushita Electric Industrial Coporation Limited affil-num=5 en-affil= kn-affil=Matsushita Electric Industrial Coporation Limited affil-num=6 en-affil= kn-affil=Matsushita Electric Industrial Coporation Limited affil-num=7 en-affil= kn-affil=Hitachi Limited affil-num=8 en-affil= kn-affil=Okayama University affil-num=9 en-affil= kn-affil=Okayama University en-keyword=printed circuit board kn-keyword=printed circuit board en-keyword=modeling kn-keyword=modeling en-keyword=power-bus resonance kn-keyword=power-bus resonance en-keyword=device kn-keyword=device en-keyword=model kn-keyword=model en-keyword=common mode kn-keyword=common mode en-keyword=imbalance kn-keyword=imbalance en-keyword=EMI simulator kn-keyword=EMI simulator en-keyword=HISES kn-keyword=HISES END start-ver=1.4 cd-journal=joma no-vol=25 cd-vols= no-issue=5 article-no= start-page=4144 end-page=4146 dt-received= dt-revised= dt-accepted= dt-pub-year=1989 dt-pub=19899 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Optimal design method of 3-D nonlinear magnetic circuit by using magnetization integral equation method en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel method for determining the sizes of iron parts in a magnetic circuit, which preserves the requirement of prescribed flux densities, has been developed. In order to take into account the nonlinear characteristics of iron, the magnetization integral equation method is used in the analysis. The effectiveness of the method is examined by applying it to the pole shape of an electromagnet. The developed software was verified by comparing calculated results with measured ones
en-copyright= kn-copyright= en-aut-name=TakahashiNorio en-aut-sei=Takahashi en-aut-mei=Norio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=UchiyamaN. en-aut-sei=Uchiyama en-aut-mei=N. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=CAD kn-keyword=CAD en-keyword=electromagnets kn-keyword=electromagnets en-keyword=magnetic circuits kn-keyword=magnetic circuits en-keyword=magnetic cores kn-keyword=magnetic cores END start-ver=1.4 cd-journal=joma no-vol=21 cd-vols= no-issue=6 article-no= start-page=2199 end-page=2202 dt-received= dt-revised= dt-accepted= dt-pub-year=1985 dt-pub=198511 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Finite element analysis of magnetic circuits composed of axisymmetric and rectangular regions en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new approximate method is developed for calculating three-dimensional magnetic fields in magnetic circuits composed of connected axisymmetric and rectangular regions. Using this new method, fairly accurate solutions can be obtained when the leakage flux from the magnetic circuit is small. In this paper, the new method is explained and then the usefulness of the technique is clarified by comparing calculated and measured flux densities.
en-copyright= kn-copyright= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakahashiN. en-aut-sei=Takahashi en-aut-mei=N. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KawaseY. en-aut-sei=Kawase en-aut-mei=Y. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=FunakoshiH. en-aut-sei=Funakoshi en-aut-mei=H. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=ItoS. en-aut-sei=Ito en-aut-mei=S. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Fukiage Factory, Fuji Electric Company Limited en-keyword=FEM kn-keyword=FEM en-keyword= Finite-element method (FEM) kn-keyword= Finite-element method (FEM) en-keyword=Magnetic analysis kn-keyword=Magnetic analysis en-keyword=Magnetic circuits kn-keyword=Magnetic circuits END start-ver=1.4 cd-journal=joma no-vol=21 cd-vols= no-issue=6 article-no= start-page=2227 end-page=2230 dt-received= dt-revised= dt-accepted= dt-pub-year=1985 dt-pub=198511 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Computaton of 3-dimensional Eddy current problems by using boundary element method en-subtitle= kn-subtitle= en-abstract= kn-abstract=The boundary element method for computing 3-dimensional eddy current distributions is presented. This method is based on Vector Green's Theorem, and unknown electric field vectors and magnetic flux density vectors are assumed on the boundaries of two materials, and unknown electric field vectors are assumed in the conductor regions. After determining these unknown vectors, 3-dimensional eddy current distributions in the conductors are computed. The computation results of a conducting sphere model by this method were examined in contrast to those of a coupled circuit model.
en-copyright= kn-copyright= en-aut-name=MisakiT. en-aut-sei=Misaki en-aut-mei=T. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TsuboiH. en-aut-sei=Tsuboi en-aut-mei=H. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University END start-ver=1.4 cd-journal=joma no-vol=35 cd-vols= no-issue=5 article-no= start-page=3965 end-page=3967 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=19990305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Improvements of single sheet testers for measurement of 2-D magnetic properties up to high flux density en-subtitle= kn-subtitle= en-abstract= kn-abstract=Due to structural limitation, the currently proposed apparatus based on a single sheet tester (SST) cannot measure magnetic properties along arbitrary directions (so-called 2-D magnetic properties) of silicon steel at high flux densities. In this paper, significant improvements are carried out on magnetizing windings and auxiliary yokes of a double excitation type of SST. Furthermore, crosswise overlapped H-coils are introduced so that even an ordinary single-excitation type of SST can be applicable to the measurements of 2-D properties. It is demonstrated that 2-D magnetization property up to 1.9 T can be measured by using the newly developed SST's
en-copyright= kn-copyright= en-aut-name=NakanoMasanori en-aut-sei=Nakano en-aut-mei=Masanori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NishimotoHidehiko en-aut-sei=Nishimoto en-aut-mei=Hidehiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=FujiwaraKoji en-aut-sei=Fujiwara en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=TakahashiNorio en-aut-sei=Takahashi en-aut-mei=Norio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University en-keyword=coils kn-keyword=coils en-keyword=eddy current losses kn-keyword=eddy current losses en-keyword=ferromagnetic materials kn-keyword=ferromagnetic materials en-keyword=iron alloys kn-keyword=iron alloys en-keyword=laminations kn-keyword=laminations en-keyword=magnetic circuits kn-keyword=magnetic circuits en-keyword=magnetic flux kn-keyword=magnetic flux en-keyword=magnetic variables measurement kn-keyword=magnetic variables measurement en-keyword=magnetisation kn-keyword=magnetisation en-keyword=silicon alloys kn-keyword=silicon alloys en-keyword=test equipment kn-keyword=test equipment en-keyword=windings kn-keyword=windings END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=19990901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Improvements of single sheet testers for measurement of 2-D magnetic properties up to high flux density en-subtitle= kn-subtitle= en-abstract= kn-abstract=Due to structural limitation, the currently proposed apparatus based on a single sheet tester (SST) cannot measure magnetic properties along arbitrary directions (so-called 2-D magnetic properties) of silicon steel at high flux densities. In this paper, significant improvements are carried out on magnetizing windings and auxiliary yokes of a double excitation type of SST. Furthermore, crosswise overlapped H-coils are introduced so that even an ordinary single-excitation type of SST can be applicable to the measurements of 2-D properties. It is demonstrated that 2-D magnetization property up to 1.9 T can be measured by using the newly developed SST's
en-copyright= kn-copyright= en-aut-name=NakanoMasanori en-aut-sei=Nakano en-aut-mei=Masanori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NishimotoHidehiko en-aut-sei=Nishimoto en-aut-mei=Hidehiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=FujiwaraKoji en-aut-sei=Fujiwara en-aut-mei=Koji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=TakahashiNorio en-aut-sei=Takahashi en-aut-mei=Norio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University en-keyword=coils kn-keyword=coils en-keyword=eddy current losses kn-keyword=eddy current losses en-keyword=ferromagnetic materials kn-keyword=ferromagnetic materials en-keyword=iron alloys kn-keyword=iron alloys en-keyword=laminations kn-keyword=laminations en-keyword=magnetic circuits kn-keyword=magnetic circuits en-keyword=magnetic flux kn-keyword=magnetic flux en-keyword=magnetic variables measurement kn-keyword=magnetic variables measurement en-keyword=magnetisation kn-keyword=magnetisation en-keyword=silicon alloys kn-keyword=silicon alloys en-keyword=test equipment kn-keyword=test equipment en-keyword=windings kn-keyword=windings END start-ver=1.4 cd-journal=joma no-vol=18 cd-vols= no-issue=6 article-no= start-page=1049 end-page=1051 dt-received= dt-revised= dt-accepted= dt-pub-year=1982 dt-pub=198211 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Application of the finite element method to the design of permanent magnets en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new method of determining the lengths of magnets in a magnetic circuit by using the finite element method has been developed. This method has the advantage that the lengths of magnets which produce the prescribed flux distribution can be directly calculated. In this paper, the error of this method is discussed at first, and then an example of application determining the shape of a magnet is shown. This method is effective for the design of magnetic circuits consisting of several permanent magnets and the determination of the shapes of magnets.
en-copyright= kn-copyright= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakahashiN. en-aut-sei=Takahashi en-aut-mei=N. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=FEM kn-keyword=FEM en-keyword= Finite-element method (FEM) kn-keyword= Finite-element method (FEM) en-keyword=Permanent magnet motors kn-keyword=Permanent magnet motors END start-ver=1.4 cd-journal=joma no-vol=18 cd-vols= no-issue=2 article-no= start-page=325 end-page=330 dt-received= dt-revised= dt-accepted= dt-pub-year=1982 dt-pub=19823 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Direct finite element analysis of flux and current distributions under specified conditions en-subtitle= kn-subtitle= en-abstract= kn-abstract=When the flux distribution of a magnetic circuit is analyzed by using the conventional finite element method, the magnetizing currents must be given. Therefore, if the flux distribution is specified, it is difficult to obtain the distributions of magnetomotive forces or configuration of magnets producing the specified field distribution by the conventional finite element method. New methods which are called the "finite element method taking account of external power source" and the "finite element method with shape modification" have been developed. The processes of calculation in these methods are contrary to the conventional technique. These new methods have the following advantages: (a) If there are many unknown independent magnetizing currents, these currents are directly calculated by the new method. (b) When a flux distribution is specified, the optimum shapes of the magnets can be directly calculated. (c) As these new methods need no repetition, computing time can be considerably reduced. The principles and the finite element formulations of these new methods are described, and a few examples of application of these methods are shown. These new methods make it possible to design the optimum magnetic circuits by using the finite element method.
en-copyright= kn-copyright= en-aut-name=NakataTakayoshi en-aut-sei=Nakata en-aut-mei=Takayoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TakahashiN. en-aut-sei=Takahashi en-aut-mei=N. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=Electromagnetic analysis kn-keyword=Electromagnetic analysis en-keyword=FEM kn-keyword=FEM en-keyword= Finite-element method (FEM) kn-keyword= Finite-element method (FEM) END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue= article-no= start-page=365 end-page=370 dt-received= dt-revised= dt-accepted= dt-pub-year=1991 dt-pub=199111 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=High-speed processing for obtaining three-dimensional distance image and its application en-subtitle= kn-subtitle= en-abstract= kn-abstract=A high-speed method of 3-D distance acquisition based on the triangulation principle is presented. This method uses conventional devices such as a CCD camera, a laser emitting semiconductor, and scanning mirrors; however, new circuits have been developed for detecting the position of spot image on the CCD. This development enables the high speed measurement and reduces the cost of the apparatus. Experiments showed that the apparatus and the method gave the practical measuring accuracy and speed, and it was found that the system is useful for image recognition. This method can easily display the stereoscopic image and cross-sectional figure of the object body. The method of real time processing has also been developed with the view to apply the device to the range finders for robots and blind persons
en-copyright= kn-copyright= en-aut-name=TanakaYutaka en-aut-sei=Tanaka en-aut-mei=Yutaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TsukaokaHideki en-aut-sei=Tsukaoka en-aut-mei=Hideki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TakedaHidetoshi en-aut-sei=Takeda en-aut-mei=Hidetoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=HondaKazuo en-aut-sei=Honda en-aut-mei=Kazuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=SaraiTakaaki en-aut-sei=Sarai en-aut-mei=Takaaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Okayama University en-keyword=CCD image sensors kn-keyword=CCD image sensors en-keyword=computer vision kn-keyword=computer vision en-keyword=computerised pattern recognition kn-keyword=computerised pattern recognition en-keyword=distance measurement kn-keyword=distance measurement en-keyword=video cameras kn-keyword=video cameras END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=242 end-page=247 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19971117 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Testing for the programming circuit of LUT-based FPGAs en-subtitle= kn-subtitle= en-abstract= kn-abstract=The programming circuit of look-up table based FPGAs consists of two shift registers, a control circuit and a configuration memory (SRAM) cell array. Because the configuration memory cell array can be easily tested by conventional test methods for RAMs, we focus on testing for the shift registers. We show that the testing can be done by using only the faculties of the programming circuit, without using additional hardware
en-copyright= kn-copyright= en-aut-name=MichinishiHiroyuki en-aut-sei=Michinishi en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=YokohiraTokumi en-aut-sei=Yokohira en-aut-mei=Tokumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OkamotoTakuji en-aut-sei=Okamoto en-aut-mei=Takuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=InoueTomoo en-aut-sei=Inoue en-aut-mei=Tomoo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=FujiwaraHideo en-aut-sei=Fujiwara en-aut-mei=Hideo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Nara Institute of Science and Technology affil-num=5 en-affil= kn-affil=Nara Institute of Science and Technology en-keyword=SRAM chips kn-keyword=SRAM chips en-keyword=field programmable gate arrays kn-keyword=field programmable gate arrays en-keyword=logic CAD kn-keyword=logic CAD en-keyword=logic testing kn-keyword=logic testing en-keyword=shift registers kn-keyword=shift registers en-keyword=table lookup kn-keyword=table lookup END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=932 end-page=937 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=199909 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Development of a video-rate range finder using dynamic threshold method for characteristic point detection en-subtitle= kn-subtitle= en-abstract= kn-abstract=This study develops a video-rate stereo range finding circuit to obtain the depth of objects in a scene by processing video signals (R, G, B, and brightness signals) from binocular CCD cameras. The electronic circuit implements a dynamic threshold method to decrease the affect of signal noise in characteristic point detection, where a video signal from each CCD camera is compared with multiple thresholds, shifting dynamically by feeding back the previous comparison result. Several object depth measurement experiments for simple indoor scenes show that the dynamic threshold method gives high acquisition and correct rates of depth data compared with those by a fixed threshold method for the video signals and a relative method for R, G, and B signals utilized in the authors' previous range finders. en-copyright= kn-copyright= en-aut-name=TanakaYutaka en-aut-sei=Tanaka en-aut-mei=Yutaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=GofukuAkio en-aut-sei=Gofuku en-aut-mei=Akio kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TakedaNobuo en-aut-sei=Takeda en-aut-mei=Nobuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NagaiIsaku en-aut-sei=Nagai en-aut-mei=Isaku kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Systems Engineering, Okayama University affil-num=2 en-affil= kn-affil=Department of Systems Engineering, Okayama University affil-num=3 en-affil= kn-affil=Graduate School of Engineering, Okayama University affil-num=4 en-affil= kn-affil=Department of Systems Engineering, Okayama University en-keyword=Video-Rate Range Finder kn-keyword=Video-Rate Range Finder en-keyword=Stereo Color CCD Camera kn-keyword=Stereo Color CCD Camera en-keyword=Autonomous Vehicle kn-keyword=Autonomous Vehicle en-keyword=Detection of Characteristic Point kn-keyword=Detection of Characteristic Point en-keyword=Real-Time Measurement kn-keyword=Real-Time Measurement END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue= article-no= start-page=4786 end-page=4789 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=20066 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On-line Identification of Electro-Conductivity in Electrolytic Solutions en-subtitle= kn-subtitle= en-abstract= kn-abstract=An on-line method is proposed to identify electro-conductivity in electrolytic solutions. The method uses a model of a cell of electrolytic solutions in a micro reactor modeled by an electronic circuit. The circuit consists of a cell part with a resister and a capacitor connected in series and a measurement part having a resister. Then the resistance and the capacitance of the cell part are identified to calculate the electro-conductivity. The identification scheme is the least-square method with a forgetting factor calculated on-line. To avoid the effect of differentiation of measured signals, a filter is added to the identification method. The effectiveness of the proposed control scheme is shown by numerical simulation.
en-copyright= kn-copyright= en-aut-name=InoueAkira en-aut-sei=Inoue en-aut-mei=Akira kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=DengMingcong en-aut-sei=Deng en-aut-mei=Mingcong kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=HaradaTakafumi en-aut-sei=Harada en-aut-mei=Takafumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=BabaYusuke en-aut-sei=Baba en-aut-mei=Yusuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MoriokaNobuhide en-aut-sei=Morioka en-aut-mei=Nobuhide kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=MutouAkinori en-aut-sei=Mutou en-aut-mei=Akinori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=UekiNobuyuki en-aut-sei=Ueki en-aut-mei=Nobuyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Okayama University affil-num=6 en-affil= kn-affil=Okayama University affil-num=7 en-affil= kn-affil=Okayama University en-keyword=Conductivity kn-keyword=Conductivity en-keyword=Electrolytic solutions kn-keyword=Electrolytic solutions en-keyword=Parameter identification kn-keyword=Parameter identification END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=280 end-page=285 dt-received= dt-revised= dt-accepted= dt-pub-year=1994 dt-pub=19941115 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Minimum test sets for locally exhaustive testing of combinational circuits with five outputs en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, features of dependence matrices of combinational circuits with five outputs are discussed, and it is shown that a minimum test set for locally exhaustive testing of such circuits always has 2 w test patterns, where w is the maximum number of inputs on which any output depends
en-copyright= kn-copyright= en-aut-name=YokohiraTokumi en-aut-sei=Yokohira en-aut-mei=Tokumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=ShimizuToshimi en-aut-sei=Shimizu en-aut-mei=Toshimi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=MichinishiHiroyuki en-aut-sei=Michinishi en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SugiyamaYuji en-aut-sei=Sugiyama en-aut-mei=Yuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=OkamotoTakuji en-aut-sei=Okamoto en-aut-mei=Takuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Okayama University en-keyword=combinational circuits kn-keyword=combinational circuits en-keyword=logic testing kn-keyword=logic testing en-keyword=matrix algebra kn-keyword=matrix algebra END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=14 end-page=19 dt-received= dt-revised= dt-accepted= dt-pub-year=1992 dt-pub=19921126 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Minimum Verification test set for combinational circuit en-subtitle= kn-subtitle= en-abstract= kn-abstract=A sufficient condition under which a minimum verification test set (MVTS) for a combinational circuit has 2w elements is derived, where w is the maximum number of inputs on which any output depends, and an algorithm to find an NVTS with 2w elements for any CUT with up to four outputs is described
en-copyright= kn-copyright= en-aut-name=MichinishiHiroyuki en-aut-sei=Michinishi en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=YokohiraTokumi en-aut-sei=Yokohira en-aut-mei=Tokumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OkamotoTakuji en-aut-sei=Okamoto en-aut-mei=Takuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=automatic testing kn-keyword=automatic testing en-keyword=built-in self test kn-keyword=built-in self test en-keyword=combinatorial circuits kn-keyword=combinatorial circuits en-keyword=logic testing kn-keyword=logic testing END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=68 end-page=74 dt-received= dt-revised= dt-accepted= dt-pub-year=1996 dt-pub=199611 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A test methodology for interconnect structures of LUT-based FPGAs en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper we consider testing for programmable interconnect structures of look-up table based FPGAs. The interconnect structure considered in the paper consists of interconnecting wires and programmable points (switches) to join them. As fault models, stuck-at faults of the wires, and extra-device faults and missing-device faults of the programmable points are considered. We heuristically derive test procedures for the faults and then show their validness and complexity
en-copyright= kn-copyright= en-aut-name=MichinishiHiroyuki en-aut-sei=Michinishi en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=YokohiraTokumi en-aut-sei=Yokohira en-aut-mei=Tokumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OkamotoTakuji en-aut-sei=Okamoto en-aut-mei=Takuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=InoueTomoo en-aut-sei=Inoue en-aut-mei=Tomoo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=FujiwaraHideo en-aut-sei=Fujiwara en-aut-mei=Hideo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Nara Institute of Science and Technology affil-num=5 en-affil= kn-affil=Nara Institute of Science and Technology en-keyword=SRAM chips kn-keyword=SRAM chips en-keyword=automatic testing kn-keyword=automatic testing en-keyword=design for testability kn-keyword=design for testability en-keyword=fault diagnosis kn-keyword=fault diagnosis en-keyword=field programmable gate arrays kn-keyword=field programmable gate arrays en-keyword=integrated circuit interconnections kn-keyword=integrated circuit interconnections en-keyword=logic testing kn-keyword=logic testing en-keyword=reconfigurable architectures kn-keyword=reconfigurable architectures en-keyword=sequential circuits kn-keyword=sequential circuits en-keyword=table lookup kn-keyword=table lookup END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue= article-no= start-page=1127 end-page=1132 dt-received= dt-revised= dt-accepted= dt-pub-year=1998 dt-pub=19985 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A visual feedback system for micromanipulation with stereoscopic microscope en-subtitle= kn-subtitle= en-abstract= kn-abstract=A stereoscopic microscope is widely used in a micromanipulation such as to operate genes and to inspect integration circuits. As in these tasks the micromanipulation is handled and makes too heavy burden to operators, it is desirable to perform the micromanipulation automatically. In this paper, we propose a visual feedback system for micromanipulation with stereoscopic microscope. This system takes less time to control the manipulator by reducing searching area to detect an object
en-copyright= kn-copyright= en-aut-name=SanoTetsuya en-aut-sei=Sano en-aut-mei=Tetsuya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NagahataHidekaz en-aut-sei=Nagahata en-aut-mei=Hidekaz kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=EndoHiroshi en-aut-sei=Endo en-aut-mei=Hiroshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SumimotoTetsuhiro en-aut-sei=Sumimoto en-aut-mei=Tetsuhiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=KunishiTakeshi en-aut-sei=Kunishi en-aut-mei=Takeshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=YamamotoHideki en-aut-sei=Yamamoto en-aut-mei=Hideki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Maritime Safety Academy affil-num=5 en-affil= kn-affil=Interface Company, Limited affil-num=6 en-affil= kn-affil=Okayama University en-keyword=CCD image sensors kn-keyword=CCD image sensors en-keyword=automatic optical inspection kn-keyword=automatic optical inspection en-keyword=image processing equipment kn-keyword=image processing equipment en-keyword=integrated kn-keyword=integrated en-keyword=circuit testing kn-keyword=circuit testing en-keyword=manipulators kn-keyword=manipulators en-keyword=micromechanical devices kn-keyword=micromechanical devices en-keyword=optical microscopes kn-keyword=optical microscopes en-keyword=robot vision kn-keyword=robot vision en-keyword=stereo image processing kn-keyword=stereo image processing END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page=14 end-page=19 dt-received= dt-revised= dt-accepted= dt-pub-year=1993 dt-pub=199311 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Proof that akers' algorithm for locally exhaustive testing gives minimum test sets of combinational circuits with up to four outputs en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, we prove that Akers' test generation algorithm for the locally exhaustive testing gives a minimum test set (MLTS) for every combinational circuit (CUT) with up to four outputs. That is, we clarify that Akers' test pattern generator can generate an MLTS for such CUT
en-copyright= kn-copyright= en-aut-name=MichinishiHiroyuki en-aut-sei=Michinishi en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=YokohiraTokumi en-aut-sei=Yokohira en-aut-mei=Tokumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OkamotoTakuji en-aut-sei=Okamoto en-aut-mei=Takuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=automatic testing kn-keyword=automatic testing en-keyword=built-in self test kn-keyword=built-in self test en-keyword=combinational circuits kn-keyword=combinational circuits en-keyword=logic testing kn-keyword=logic testing en-keyword=matrix algebra kn-keyword=matrix algebra en-keyword=minimisation kn-keyword=minimisation END start-ver=1.4 cd-journal=joma no-vol=2009 cd-vols= no-issue=1 article-no= start-page=53 end-page=58 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=20091111 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An Intelligent Auxiliary Vacuum Brake System en-subtitle= kn-subtitle= en-abstract= kn-abstract=The purpose of this paper focuses on designing an intelligent, compact, reliable, and robust auxiliary vacuum brake system (VBS) with Kalman filter and self-diagnosis scheme. All of the circuit elements in the designed system are integrated into one programmable system-on-chip (PSoC) with entire computational algorithms implemented by software. In this system, three main goals are achieved: (a) Kalman filter and hysteresis controller algorithms are employed within PSoC chip by software to surpass the noises and disturbances from hostile surrounding in a vehicle. (b) Self-diagnosis scheme is employed to identify any breakdown element of the auxiliary vacuum brake system. (c) Power MOSFET is utilized to implement PWM pump control and compared with relay control. More accurate vacuum pressure control has been accomplished as well as power energy saving. In the end, a prototype has been built and tested to confirm all of the performances claimed above. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TongChia-Chang kn-aut-sei=Tong kn-aut-mei=Chia-Chang aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=LinJhih-Yu kn-aut-sei=Lin kn-aut-mei=Jhih-Yu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=LiShih-Fan kn-aut-sei=Li kn-aut-mei=Shih-Fan aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=LiJiun-Yi kn-aut-sei=Li kn-aut-mei=Jiun-Yi aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Chienkuo Technology University affil-num=2 en-affil= kn-affil=Chienkuo Technology University affil-num=3 en-affil= kn-affil=Chienkuo Technology University affil-num=4 en-affil= kn-affil=Chienkuo Technology University en-keyword=Intelligent system kn-keyword=Intelligent system en-keyword=Auxiliary Vacuum Brake System (VBS) kn-keyword=Auxiliary Vacuum Brake System (VBS) en-keyword=Kalman Filter kn-keyword=Kalman Filter en-keyword=Self-diagnosis kn-keyword=Self-diagnosis en-keyword=Programmable System-on-chip (PSoC) kn-keyword=Programmable System-on-chip (PSoC) en-keyword=Dynamic Reconfiguration kn-keyword=Dynamic Reconfiguration END start-ver=1.4 cd-journal=joma no-vol=29 cd-vols= no-issue=1 article-no= start-page=1 end-page=6 dt-received= dt-revised= dt-accepted= dt-pub-year=1994 dt-pub=19941130 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Scribing of Ceramie Circuit Board with Q-Switched Nd：YAG Laser en-subtitle= kn-subtitle= en-abstract= kn-abstract=Scribing of copper coated alumina ceramic board with Q-switched YAG laser used for the maskless direct patterning of circuit board is experimentally investigated, which leads to efficient production of trial circuit board. Better dividing of alumina circuit board 655μm in thickness can be attained by the scribing of about 100μm depth. Higher repetition frequency of laser irradiation leads to smaller notch angle and lower breaking load. en-copyright= kn-copyright= en-aut-name=UnoYoshiyuki en-aut-sei=Uno en-aut-mei=Yoshiyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KubotaShin-ichiro en-aut-sei=Kubota en-aut-mei=Shin-ichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=YokomizoSeiichi en-aut-sei=Yokomizo en-aut-mei=Seiichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=OgataKojiro en-aut-sei=Ogata en-aut-mei=Kojiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TadaNobuhiko en-aut-sei=Tada en-aut-mei=Nobuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Industrial Technology Center of Okayama Prefecture affil-num=3 en-affil= kn-affil=Industrial Technology Center of Okayama Prefecture affil-num=4 en-affil= kn-affil=Hitachi Construction Machinery Co., Ltd affil-num=5 en-affil= kn-affil=Hitachi Construction Machinery Co., Ltd END start-ver=1.4 cd-journal=joma no-vol=70 cd-vols= no-issue=4 article-no= start-page=1457 end-page=1462 dt-received= dt-revised= dt-accepted= dt-pub-year=1958 dt-pub=19580430 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Experimental Studies on the Influences of Various Anesthetical Methods Upon the Water Content in the Lung Part Ⅳ. Experiments of the Influence of Oxygen Deficiency and Carbon Dioxide Accumulation Upon the Water Content in the Lung kn-title=各種麻酔法の肺含水量に及ぼす影響に関する実験的研究 第4編 酸素欠乏ならびに炭酸ガス蓄積の肺含水量に及ぼす影響に関する実験的研究 en-subtitle= kn-subtitle= en-abstract= kn-abstract=To dogs anesthetized with ravonal low oxygen gas was given or accumulation of carbon dioxide was evoked. After that the influence on the water content of the lung was observed and the following results were obtained. 1) In the group to which pure oxygen was given during ravonal intravenous anesthesia, the water content of the lung showed little less than the control. 2) In the group air or 15 vol.% oxygen was given, the water content increased though slightly in degree. The increase was more marked with the latter. 3) With 10 vol.% or 5 vol.% oxygen, the water content of the lung increased markedly. However, in the group inhaled 5 vol.% oxygen than in that with 10 vol.% oxygen, the degree of increase was slighter, because the animals died in the relatively early stage. 4) By carbon dioxide accumulation, too. the water content of the lungs increased markedly. From the above stated data, anoxia and hypercapnia are the most important causes for postoperative acute pulmonary edema and closed circuit anesthesia is often accompanied with the both complications. en-copyright= kn-copyright= en-aut-name=BanRyuzaburo en-aut-sei=Ban en-aut-mei=Ryuzaburo kn-aut-name=伴龍三郎 kn-aut-sei=伴 kn-aut-mei=龍三郎 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部第1（陣内）外科教室 END start-ver=1.4 cd-journal=joma no-vol=70 cd-vols= no-issue=4 article-no= start-page=1445 end-page=1450 dt-received= dt-revised= dt-accepted= dt-pub-year=1958 dt-pub=19580430 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Experimental Studies on the Influences of Various Anesthetical Methods Upon the Water Content in the Lung Part Ⅱ. Experiments of the Influence of Various Anesthetics Upon the Water Content in the Lung kn-title=各種麻酔法の肺含水量に及ぼす影響に関する実験的研究 第2編 各種麻酔剤の肺含水量に及ぼす影響に関する実験的研究 en-subtitle= kn-subtitle= en-abstract= kn-abstract=To examine whether anesthetics have to do with the development of postoperative acute pulmonary edema, dogs were anesthetized with either ravonal, ether, cyclopropane, nitrous oxide and ether+hypotensive anesthesia and the water content of the lungs was measured after two hours. The results obtained were as follows: 1) When ravonal was intravenously injected during the respiration under the atmospheric air, the water content of the lungs increased slightly in comparison to the control. This is not to be ascribed to the direct action of ravonal but to anoxia and hypercapnia due to the inhibited respiration. 2) When closed circuit endotracheal anesthesia was performed under inhalation of pure oxygen, with any anesthetic, the water content of the lung did not vary and stayed within the standard deviation of the control. en-copyright= kn-copyright= en-aut-name=BanRyuzaburo en-aut-sei=Ban en-aut-mei=Ryuzaburo kn-aut-name=伴龍三郎 kn-aut-sei=伴 kn-aut-mei=龍三郎 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部第1（陣内）外科教室 END start-ver=1.4 cd-journal=joma no-vol=76 cd-vols= no-issue=10 article-no= start-page=511 end-page=520 dt-received= dt-revised= dt-accepted= dt-pub-year=1964 dt-pub=19641030 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Study on State of Hepatic Circulation Part 1. Relationship Between State of Hepatic Circulation and BSP Test in Hepatic Diseases kn-title=肝循環動態に関する研究 第1編 肝疾患における肝循環動態とBSP試験の関係 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The volume of hepatic blood flow was determined on a total of 100 hepatic diseass patients; acute hepatitis 2, chronic hepatitis 75, hepatocirrhosis 21 and fatty liver 2; by Galactose continual Infusion Method devised by Nakamura et al. At the same time, the correlation between state of hepatic circulation and BSP test was observed stochastically using as index the BSP test findings noted at time of initial out-patient examination and the BSP test find ings obtained within one week both prior to and after hepatic blood flow volume determination made following admission to the hospital. Further, comparisons were made with the hepatic tissue picture obtained by biopsy. The followresults were obtained. 1) The average value of the total hepatic blood flow Volume for the 100 hepatic disease cases was 857±46cc/min/M(2). The 49 cases with wedded hepatic venous pressure (WHVP), but without hepatic shunt flow had an average value of 135±21mm H(2)O. 2) A positive correlation with a coefficient of 0.69 was noted between WHVP and BSP test results. Further, an approximate value of 0.64 was demonstrated between the initial outpatient BSP test findings. In cases with WHVP of over 175mm H(2)O, the change-over rate to negative BSP test results following 3 to 4 weeks of hospitalization, bedrest and treatment was 13.8% , and 71.1% for those with values of less than 175mm H(2)O. 3) A negative correlation with a coefficient of -0.34 was noted between effective hepatic blood flow volume and BSP test results. Further, anegative correlation of -0.27 was demonstrated between the initial out-patient ASP test findings. In cases with an effective hepatic blood flow volume of less than 500cc/min/M(2), the change-Over rate to negative BSP test results following 3 to 4 weeks of hospitalization, bedrest and treatment was 35.0%, while that of cases with volumes of over 500cc/min/M(2) was 48.9%. 4) A positive correlation with a coefficient of 0.55 was noted between rate of hepatic short circuit and BSP test results. A positive correlation of 0.50 was demonstrated between the initial outpatient BSP test findings. In cases with hepatic short circuit, the change-over rate to negative BSP test results following 3 to 4 weeks of hospitalization, bedrest and treatment was 1%, while that in those without hepatic short circuit was 63.3%. 5) Of the 42 cases with more than a moderate degree of hepatic cell degeneration and necrosis (includes 2 cases with negative BSP test findings from the beginning), 9 cases or 22.5% demonstrated normal BSP test findings following 3 to 4 weeks of hospitalization, bedrest and treatment, while of 58 cases with slight degeneration and necrosis (includes 2 cases with normal BSP test findings from the beginning), 24 cases or 82.8% became normal during the same short period of time. 6) A follow-up BSP test survey wase conducted on 30 chronic hepatitis cases whose BSP test findings at time of discharge had become normal, and aggravations were noted in 11. Among those with aggravations, 7 or 63.5% had hepatic circulatory abnormalities during hospitalization. 7) From the above findings, it has been shown that not only degeneration and necrosis of hepatic cells are related to the BSP test value, but a relationship is also noted between the state of hepatic circulation. Therefore, it is necessary to consider both together before making any decision. en-copyright= kn-copyright= en-aut-name=NanbaHideki en-aut-sei=Nanba en-aut-mei=Hideki kn-aut-name=難波英樹 kn-aut-sei=難波 kn-aut-mei=英樹 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部第1内科教室 END start-ver=1.4 cd-journal=joma no-vol=77 cd-vols= no-issue=3 article-no= start-page=597 end-page=630 dt-received= dt-revised= dt-accepted= dt-pub-year=1965 dt-pub=19650330 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Experimental and Clinical Studies On the Regional Perfusion of Anticancer Agents for Malignant Neoplasms kn-title=悪性腫瘍に対する制癌剤の局所灌流療法に関する実験的並びに臨床的研究 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Cancer chemotherapy by regional perfusion utilizing an extracorporeal circuit was studied experimentally and clinically, designing to investigate the local tissue tolerance, the leakage factor, the tumoricidal effect and so on. The following results were obtained. 1. The maximum safe doses of Nitrogen mustard N-oxide, Triethylene thiophosphoramide, Carzinophilin, Mitomycin C, Actinomycin D and Toyomycin when administered by perfusion into the femoral artery of dog were 5mg/kg., 2mg/kg., 2.500 units/kg., 0.8mg/kg., 80γ/kg. and 100γ/kg. respectively. 2. Under perfusion of the hind limb for periods up to 30 minutes oxygenation of the perfusing blood has nothing to do with local tissue damage. 3. On isolation perfusion under hyperthermia (40℃) or hypothermia (5℃) utilizing a heat exchanger the normal tissue damage was higher than that of normothermia. 4. The fluctuation of concentration of the drugs and the leakage factor were determined in the perfused area and systemically by means of RISA, P(32)-labeled TSPA and bio-assay of Mitomycin C. The results obtained by RISA were always higher than those of the other two, and did not indicate accurate picture in estimation of the leakage into systemic circulation. 5. The titer of Mitomycin C was unchanged by pure oxygen insufflation for 30 to 60 minutes or by the preservation mixed with whole blood in refrigerator for ten days. 6. On perfusion of the hind limb of rabbit utilizing p(32)-labeled TSPA a reversible fixation or accumulation of the drug in the perfused area was actually proved. 7. The tumoricidal effect on Brown-pearce tumor of rabbit was much evident in one-shot administration of the drug, in non-oxygenation of the blood in case of Mitomycin C, and in hyperthermic condition in case of Mitomycin C or TSPA. 8. Employing these technics twenty-nine patients with malignant neoplasms have been treated thirty-seven times. One axillary, two subclavian, fifteen pelvic, one iliac, seventeen femoral and one popliteal perfusions were included in this series. The follow-up period is too short to allow complete evaluation, but the results suggest that this method is one of the most impressive maneuver treating malignant neoplasms. 9. The undesirable effect either in the perfused area or systemically was practically negligible. en-copyright= kn-copyright= en-aut-name=KawasakiAkinori en-aut-sei=Kawasaki en-aut-mei=Akinori kn-aut-name=川崎明徳 kn-aut-sei=川崎 kn-aut-mei=明徳 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部第2外科教室 END start-ver=1.4 cd-journal=joma no-vol=77 cd-vols= no-issue=2 article-no= start-page=369 end-page=377 dt-received= dt-revised= dt-accepted= dt-pub-year=1965 dt-pub=19650228 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Application of Ultrasonics to Medical Diagnastic Method Part 1. Fundamental Study on Medical Application of Ultrasonics kn-title=医学的診断領域における超音波に関する研究 第1編 超音波の医学的応用に関する諸問題 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The application of ultrasonics to medical diagnostic method has not been so much successful, because the complexity of the sound reflecting structures echos which are so numerous and variable that controlled experiments and consistent results are difficult to obtain. In this point, fundamental electrical and ultrasonic study in medicine has been very important; electrical circuit of the pulse generater, receiver, amplifier and indicator, pulse length and intensity of the transmitter, the directibility of the ultrasonic beam and scanning mehtod, they would be concerned with upper problem. A new type of apparatus for this study has been designed and produced by the author; Sensitivity of the recciver is 90～100 dB, measuring distance is 2mm～1.8m and the freguency of the pulse generator is 0.5MC～10MC. A 500pF capactior is charged to about 1,800 V through a high resistance and is then discharged by a thyratron tube (3C45) through the primary winding of a pulse transformer. The amplitude of the transmited ultrasonic pulse rises from lμs to its maximum value in 20μs. Fifty or sixty such pulses are transmited each secound to human body. This apparatus has been used to diagnostic medicine and fundamental study in the author's clinic. en-copyright= kn-copyright= en-aut-name=SadamotoKazuhiko en-aut-sei=Sadamoto en-aut-mei=Kazuhiko kn-aut-name=貞本和彦 kn-aut-sei=貞本 kn-aut-mei=和彦 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部第1外科教室 END start-ver=1.4 cd-journal=joma no-vol=43 cd-vols= no-issue= article-no= start-page=75 end-page=92 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=200901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Human Support Agent for Design and Diagnosis using Classifier System en-subtitle= kn-subtitle= en-abstract= kn-abstract=As is well known, an advanced knowledge and know-how are needed in the design and the diagnosis work. Further, human experts can cope with the recent trend of customers needs. Therefore, the design and the diagnosis work have been privately performed in the past, and its information cannot be shared. In addition, the number of experts is decreasing. It is a very important problem to maintain and to extend experts technologies having been built up. For the purpose, methods and systems for technical inheritance of the advanced techniques of the skilled engineers are needed to train the unskilled operators and also can assist skilled operators. In this research, attention is focused on the design of analog filter circuit. To attain the target, the circuit structural classifier system to support design work is developed. Furthermore, simulation technology for hot strip rolling mills based on distributed agents is presented aimed to develop tools for the diagnosis of hot strip rolling mills operation. en-copyright= kn-copyright= en-aut-name=OheKeita en-aut-sei=Ohe en-aut-mei=Keita kn-aut-name=大江啓太 kn-aut-sei=大江 kn-aut-mei=啓太 aut-affil-num=1 ORCID= en-aut-name=KonishiMasami en-aut-sei=Konishi en-aut-mei=Masami kn-aut-name=小西正躬 kn-aut-sei=小西 kn-aut-mei=正躬 aut-affil-num=2 ORCID= en-aut-name=ImaiJun en-aut-sei=Imai en-aut-mei=Jun kn-aut-name=今井純 kn-aut-sei=今井 kn-aut-mei=純 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Division of Electronic and Information System Engineering Graduate School of Natural Science and Technology Okayama University affil-num=2 en-affil= kn-affil=Division of Electronic and Information System Engineering Graduate School of Natural Science and Technology Okayama University affil-num=3 en-affil= kn-affil=Division of Electronic and Information System Engineering Graduate School of Natural Science and Technology Okayama University END start-ver=1.4 cd-journal=joma no-vol=83 cd-vols= no-issue=9-10 article-no= start-page=357 end-page=395 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19711030 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=STUDIES ON INJURY TO ERYTHOROCYTES DURING EXSTRACOPOREAL CIRCULATION kn-title=体外循環における赤血球損傷に関する研究 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Clinical and experimental studies on hemolysis during extracorporeal circulation were performed. Various factors of hemolysis were analized as to perfusion methods, refering to erythrocyte life span. Conclusions are as follows: 1) Concerning hemolysis, ACD blood for priming preserved for 2 to 3 days is not inferior to one preserved for a day. 2) Disc oxygenators give less damage to erythrocytes than bubble oxygenators. 3) Blood from cyanotic heart diseases has a tendency to show more hemolysis than blood from a cyanotic heart diseases. 4) Mechanical hemolysis increases as blood temperature drops. 5) As antihemolytic agents, Mannitol is effective, but Pluronic F-68 shows no recognizable effects in vitro experiments. 6) Blood retension in the pericardium causes marked hemolysis, resulting in elevation of free Hb level in suction circuit, and return of blood from suction circuit to oxygenator gives a rise to elevation of plasma free Hb level in extracorporeal circulation with a little influence to total free Hb level. 7) Hemodilution is effective to decrease damage to erythrocytes. 8) Kind of diluent gives great influence to hemolysis. Gelatin has proved to be best. 9) Hemoglobinuria is seen at higher level of plasma free Hb than 110-140mg/dl after extra- corporeal circulation. 10) Erythrocyte life span is much shortened with even mild mechanical stimulation to erythrocytes. With strong stimulation, it was markedly shortened. en-copyright= kn-copyright= en-aut-name=OtakiTatsuo en-aut-sei=Otaki en-aut-mei=Tatsuo kn-aut-name=大滝達郎 kn-aut-sei=大滝 kn-aut-mei=達郎 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部第2外科教室 END start-ver=1.4 cd-journal=joma no-vol=87 cd-vols= no-issue=3-4 article-no= start-page=207 end-page=209 dt-received= dt-revised= dt-accepted= dt-pub-year=1975 dt-pub=19750430 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Analysis by differential curve of flow volume curve, using flow volume curve recorder attached with differential circuit kn-title=Flow volume curve recorderの微分回路による分析について en-subtitle= kn-subtitle= en-abstract= kn-abstract=In order to do precise analysis of flow volume curve, the newly devised curves (differential flow volume curves) which are drawn dy a new recorder attached with differential circuit and indicate differential value of flow volume curve, were investigated. en-copyright= kn-copyright= en-aut-name=MeguroTadamichi en-aut-sei=Meguro en-aut-mei=Tadamichi kn-aut-name=目黒忠道 kn-aut-sei=目黒 kn-aut-mei=忠道 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部公衆衛生学教室 END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=20090930 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=プリント回路基板から生じる放射低減のための多導体線路理論に基づく平衡度不整合理論を用いたコモンモード制御 kn-title=Common-mode Control Using Imbalance Difference Model Based on Multi-conductor Transmission Line Theory for Reduction of Radiated Emission from Printed Circuit Boards en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=MatsushimaToru en-aut-sei=Matsushima en-aut-mei=Toru kn-aut-name=松嶋徹 kn-aut-sei=松嶋 kn-aut-mei=徹 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=121 cd-vols= no-issue=3 article-no= start-page=149 end-page=156 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=20091201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=A CACNB4 mutation showing altered Ca(v)2.1 function in a patient with Dravet syndrome kn-title=Dravet 症候群患者に認められたカルシウムチャネル 機能異常を引き起こす CACNB4 遺伝子変異 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=OhmoriIori en-aut-sei=Ohmori en-aut-mei=Iori kn-aut-name=大守伊織 kn-aut-sei=大守 kn-aut-mei=伊織 aut-affil-num=1 ORCID= en-aut-name=OuchidaMamoru en-aut-sei=Ouchida en-aut-mei=Mamoru kn-aut-name=大内田守 kn-aut-sei=大内田 kn-aut-mei=守 aut-affil-num=2 ORCID= en-aut-name=MimakiNobuyoshi en-aut-sei=Mimaki en-aut-mei=Nobuyoshi kn-aut-name=御牧信義 kn-aut-sei=御牧 kn-aut-mei=信義 aut-affil-num=3 ORCID= en-aut-name=NishikiTeiichi en-aut-sei=Nishiki en-aut-mei=Teiichi kn-aut-name=西木禎一 kn-aut-sei=西木 kn-aut-mei=禎一 aut-affil-num=4 ORCID= en-aut-name=TomizawaKazuhito en-aut-sei=Tomizawa en-aut-mei=Kazuhito kn-aut-name=富澤一仁 kn-aut-sei=富澤 kn-aut-mei=一仁 aut-affil-num=5 ORCID= en-aut-name=MatsuiHideki en-aut-sei=Matsui en-aut-mei=Hideki kn-aut-name=松井秀樹 kn-aut-sei=松井 kn-aut-mei=秀樹 aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=岡山大学大学院医歯薬学総合研究科 細胞生理学 affil-num=2 en-affil= kn-affil=岡山大学大学院医歯薬学総合研究科 分子遺伝学 affil-num=3 en-affil= kn-affil=倉敷成人病センター 小児科 affil-num=4 en-affil= kn-affil=岡山大学大学院医歯薬学総合研究科 細胞生理学 affil-num=5 en-affil= kn-affil=岡山大学大学院医歯薬学総合研究科 細胞生理学 affil-num=6 en-affil= kn-affil=岡山大学大学院医歯薬学総合研究科 細胞生理学 en-keyword=てんかん kn-keyword=てんかん en-keyword=Dravet 症候群 kn-keyword=Dravet 症候群 en-keyword=CACNB4遺伝子 kn-keyword=CACNB4遺伝子 en-keyword=SCN1A 遺伝子 kn-keyword=SCN1A 遺伝子 END start-ver=1.4 cd-journal=joma no-vol=91 cd-vols= no-issue=11-12 article-no= start-page=1507 end-page=1525 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791230 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=An electroencephalographic study on Creutzfeldt-Jakob disease- Report of two autopsy cases and literature review kn-title=Creutzfeldt-Jakob病の脳波学的検討 ―2剖検例の報告と文献的考察― en-subtitle= kn-subtitle= en-abstract= kn-abstract=This report concerns 2 autopsy cases of Creutzfeldt-Jakob disease (CJD) in which the relationship between changes in serial electroencephalograms and the course of the disease is analysed. The importance of timing when periodic synchronous discharge (PSD) occurs was indicated. i.e., the appearance of PSD paralleled clinical manifestations of the apallic syndrome and was most distinct when the disease was at its worst. We reviewed the EEG findings in autopsy cases of CJD reported in Japan. Fifteen cases of typical PSD were found and these were examined clinico-pathologically. The findings were: 1. PSD was recorded within three months of the onset of the disease in two thirds of the 15 cases. 2. In 13 cases the clinical manifestations when PSD occurred were those of apallic syndrome or of similar conditions. 3. Following characteristics were found in the distribution of pathological changes in the brain; (a) The presence of extensive changes in the cerebral cortex was the only finding common to all cases. (b) The cerebral changes mainly occurred in the corpus striatum of the basal ganglia and in the medical nuclei of the thalamus. (c) Disturbances were least in the brain-stem below the level of the midbrain. (d) No definite tendency was apparent in the changes of the cerebral white matter and cerebellum. In conclusion, the mechanism of PSD may be accounted for by disturbances of the cortico-thalamic circuit. This circuit is said to be regulated by diffuse thalamic projection system. It is presumed that the extensive pathology in the cortex and medical nuclei of the thalamus plays an important role. en-copyright= kn-copyright= en-aut-name=YoshinagaJunji en-aut-sei=Yoshinaga en-aut-mei=Junji kn-aut-name=好永順二 kn-aut-sei=好永 kn-aut-mei=順二 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=社会保険・広島市民病院・神経科 en-keyword=Creutzfeldt-Jakob病 kn-keyword=Creutzfeldt-Jakob病 en-keyword=周期性同期性放電(PSD) kn-keyword=周期性同期性放電(PSD) END start-ver=1.4 cd-journal=joma no-vol=97 cd-vols= no-issue=3-4 article-no= start-page=301 end-page=314 dt-received= dt-revised= dt-accepted= dt-pub-year=1985 dt-pub=19850430 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Experimental Study on Progression of Acute Aortic Dissection kn-title=急性大動脈解離の進展の機序に関する実験的研究 en-subtitle= kn-subtitle= en-abstract= kn-abstract=There are many factors pointed out theoretically as influencing the progression of acute aortic dissection, but few factors have been proved experimentally. In this study, hemodynamic factors were evaluated experimentally as to how they related to the progression of aortic dissection. DeBaKey type IIIb aortic dissections were made by Blanton's method in the descending thoracic aorta of dogs. At the initiation of progression of aortic dissection, blood pressure, LV dp/dt, aorta dp/dt, flow volume, flow velocity and blood viscosity were measured. Each factor was also evaluated by Prokopf's method in which aorta was inserted in the closed circuit with pump. As to hemodynamic factors affecting the progression of acute aortic dissections; 1) Hypertension was the most important factor. 2) LV dp/dt was not so important, as mentioned by Wheat. 3) The flow volume, velocity and viscosity were thought to be important theoretically, but these factors did not prove to be significant in this study. Retrograde dissections progressed after making the intimal tear wider and longer, and by increasing peripheral resistances. The dissected layers in the media were variable, but most of the specimens were dissected at the outer layer in the proximal area and at the inner layer in the distal area. en-copyright= kn-copyright= en-aut-name=ShirakawaKazutoyo en-aut-sei=Shirakawa en-aut-mei=Kazutoyo kn-aut-name=白川和豊 kn-aut-sei=白川 kn-aut-mei=和豊 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学第二外科 en-keyword=急性大動脈解離 kn-keyword=急性大動脈解離 en-keyword=解離進展に関与する因子 kn-keyword=解離進展に関与する因子 en-keyword=逆行性解離 kn-keyword=逆行性解離 en-keyword=解離の層 kn-keyword=解離の層 END start-ver=1.4 cd-journal=joma no-vol=17 cd-vols= no-issue=2 article-no= start-page=15 end-page=29 dt-received= dt-revised= dt-accepted= dt-pub-year=1983 dt-pub=19830630 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Transmission Distance and Bit Rate in an Optical-Fiber Multi-Level PCM Transmission System en-subtitle= kn-subtitle= en-abstract= kn-abstract=Optical-fiber multi-level PCM transmission system is investigated on the transmission distance and bit rate. A communication channel is established as follows: a light signal is modulated in intensity with a completely-balanced M-Ievel code at a transmitter, and is propagated over an optical glass fiber, and is demodulated at a receiver where the signal with an additive noise is processed through a PD, an equalizing amplifier, a matched filter, (M-l) comparators and a decision circuit. The relative power of the noise from the amplifier is increased in accordance with the reciprocal of fiber's transmittance, where shot noise and thermal noise are smoothed and decreased in power by the matched filter. The relation between the BER and the SNR leads the transmission distance. The product of the transmission distance and bit rate takes the large maximum at the large values of SNR and M. The large value of M is suitable for low-speed and high-rate system, and the interference system. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanadaYoshihiro kn-aut-sei=Tanada kn-aut-mei=Yoshihiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SanoHiroya kn-aut-sei=Sano kn-aut-mei=Hiroya aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=XuHai kn-aut-sei=Xu kn-aut-mei=Hai aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics affil-num=3 en-affil= kn-affil=Northeastern Normal University END start-ver=1.4 cd-journal=joma no-vol=17 cd-vols= no-issue=2 article-no= start-page=1 end-page=14 dt-received= dt-revised= dt-accepted= dt-pub-year=1983 dt-pub=19830630 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Computer Aided Design of Thyristor Phase-Control Circuits en-subtitle= kn-subtitle= en-abstract= kn-abstract=The paper presents the computer aided design (CAD) method, the program, the design and the experimental results of inverse parallel thyristor phase control circuits. The calculated values agree well with the measured. The CAD program contains the next two methods which are inquired carefully by authors, such as (i) the optimization by SUMT (Sequential Unconstrained Minimization Technique) method, and (ii) the combined use of the gradient and the cramp calculation methods. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSen-ichiro kn-aut-sei=Nakanishi kn-aut-mei=Sen-ichiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KatsuyamaYoshiaki kn-aut-sei=Katsuyama kn-aut-mei=Yoshiaki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=The Kansai Electric Power Co. Inc. affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=17 cd-vols= no-issue=1 article-no= start-page=15 end-page=40 dt-received= dt-revised= dt-accepted= dt-pub-year=1983 dt-pub=19830225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of Three-Phase Thyristor Phase Control Circuit with Series RLC Elements en-subtitle= kn-subtitle= en-abstract= kn-abstract=An ac phase control circuit by thyristor is widely used in industry, The characteristics of the singlephase circuit with series RLC elements are numerically analyzed, and is reported the interesting phenomenon of step-up voltage without transformer. However, the performance of three phase phase control circuit with series RLC elements is not made clear. In this paper, the performance of three-phase control circuit of a balanced and an unbalanced load with series RLC elements is described. The analytical programs with each load are developed, and it is clarified that the calculated by this analytical program agree well with the measured. The calculated results, e.g. waveforms, RMS values of voltage and current, power, and power factor are illustrated and discussed the step-up phenomenon in three phase. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSen-ichiro kn-aut-sei=Nakanishi kn-aut-mei=Sen-ichiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FunabikiShigeyuki kn-aut-sei=Funabiki kn-aut-mei=Shigeyuki aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KomatsubaraHitoshi kn-aut-sei=Komatsubara kn-aut-mei=Hitoshi aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KuroseOsamu kn-aut-sei=Kurose kn-aut-mei=Osamu aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=Department of Electrical Engineering affil-num=5 en-affil= kn-affil=Graduate School of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=16 cd-vols= no-issue=2 article-no= start-page=31 end-page=43 dt-received= dt-revised= dt-accepted= dt-pub-year=1982 dt-pub=19820329 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Influence of Magnetic Saturation of Iron-Core on Performance of Thyristor Phase Control Circuit en-subtitle= kn-subtitle= en-abstract= kn-abstract=The influence of magnetic saturation of iron-core on the performance of thyristor phase control circuit with series RLC elements is described. The circuit is analyzed by applying an approximate model of three straight lines to the flux Φ vs. current i curve of the iron-core reactor. And the influence on waveforms, r.m.s. values, power factor and response are discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSen-ichiro kn-aut-sei=Nakanishi kn-aut-mei=Sen-ichiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FunabikiShigeyuki kn-aut-sei=Funabiki kn-aut-mei=Shigeyuki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=16 cd-vols= no-issue=2 article-no= start-page=17 end-page=29 dt-received= dt-revised= dt-accepted= dt-pub-year=1982 dt-pub=19820329 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of Thyristor Phase Control Circuit with Parallel Resonance Elements en-subtitle= kn-subtitle= en-abstract= kn-abstract=The phase control characteristics in a thyristor phase control circuit with parallel resonance elements indicate very interesting phenomenon. Several extreme values appear on the phase control curve. The phenomenon is different from the step-up one in a thyristor phase control circuit with series RLC elements which is interpreted as series resonance. To comprehend the circuit performance with those loads, it is necessary that the phenomenon on extreme value is physically clarified from other viewpoints. In this paper the performance in this circuit is studied from two viewpoints of a natural oscillation and a parallel resonance. Then, it is found that the performance depends on a natural frequency in thyristor conducting period and a parallel resonance frequency in thyristor non-conducting period. Therefore, the interesting phenomenon on extreme value is affected by the alternative of natural frequency or parallel resonance frequency. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSen-ichiro kn-aut-sei=Nakanishi kn-aut-mei=Sen-ichiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FunabikiShigeyuki kn-aut-sei=Funabiki kn-aut-mei=Shigeyuki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=18 cd-vols= no-issue=1 article-no= start-page=91 end-page=100 dt-received= dt-revised= dt-accepted= dt-pub-year=1984 dt-pub=19840330 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Optical Circuit for Waveform-synthesis with Utilizing both GaAs- and Si-Optoelectronic Switches en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper presents an optical-waveform synthesizer as one of the applications of optical bistable devices. This device is advantageous in terms of faster operation in which width of each pulse obtained is down to the order of subnanosecond, because this device employs both GaAs- and Si-optoelectronic switches as photodetector. Optical pulse shaping as a preliminary experiment is also described. en-copyright= kn-copyright= en-aut-name=SanoHiroya en-aut-sei=Sano en-aut-mei=Hiroya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KogaRyuji en-aut-sei=Koga en-aut-mei=Ryuji kn-aut-name=古賀隆治 kn-aut-sei=古賀 kn-aut-mei=隆治 aut-affil-num=2 ORCID= en-aut-name=KosakaMegumi en-aut-sei=Kosaka en-aut-mei=Megumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=WakeIchiro en-aut-sei=Wake en-aut-mei=Ichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics affil-num=3 en-affil= kn-affil=Department of Electronics affil-num=4 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=15 cd-vols= no-issue=2 article-no= start-page=1 end-page=19 dt-received= dt-revised= dt-accepted= dt-pub-year=1981 dt-pub=19810330 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Generalized Analytical Program of Thyristor Phase Control Circuit with Series and Parallel Resonance Load en-subtitle= kn-subtitle= en-abstract= kn-abstract=The systematic analytical method is reqUired for the ac phase control circuit by means of an inverse parallel thyristor pair which has a series and parallel L-C resonant load, because the phase control action causes abnormal and interesting phenomena, such as an extreme increase of voltage and current, an unique increase and decrease of contained higher harmonics, and a wide variation of power factor, etc. In this paper, the program for the analysis of the thyristor phase control circuit with a series and parallel connected load of series R-L-C circuit units, is been developed. By means of the program, the transient and steady state characteristics of the circuit can be calculated and then comparative study of various versions of circuits can be carried out systematically. The usefulness of the program is demonstrated by some numerical calculated examples. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSen-ichiro kn-aut-sei=Nakanishi kn-aut-mei=Sen-ichiro aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshidaHideaki kn-aut-sei=Ishida kn-aut-mei=Hideaki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Deaprtment of Electrical Engineering affil-num=2 en-affil= kn-affil=Graduate School of Electrical Engineering affil-num=3 en-affil= kn-affil=Deaprtment of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=15 cd-vols= no-issue=1 article-no= start-page=17 end-page=28 dt-received= dt-revised= dt-accepted= dt-pub-year=1980 dt-pub=19801129 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Influences of the Skin Impedance as the Interface in Bioelectric Potential Measurement en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the case of non-invasive measurement of bioelectric potential from body surface, the influence of the skin impedance has been investigated by using strict equivalent circuits of skin impedances. The relationship between the characteristic of skin impedance and the wave distortion was made clear. Furthermore, in the case of electrocardiograph, the shift potential of indifferent electrode to standard potential was obtained by means of simulation, and the distortions caused by connective resistances of a central terminal and skin impedance were quantitatively explained. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoYoshitake kn-aut-sei=Yamamoto kn-aut-mei=Yoshitake aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoTatsuma kn-aut-sei=Yamamoto kn-aut-mei=Tatsuma aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=1 article-no= start-page=39 end-page=53 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19791201 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Behaviors of a Soliton in Nonlinear L-C Lines with Abrupt Parameter Change en-subtitle= kn-subtitle= en-abstract= kn-abstract=Some behaviors of a lattice soliton in nonlinear L-C ladder lines with abrupt parameter change are investigated. The results of computer and circuit experiments show that in the case of a soliton incident upon the line of larger characteristic impedance and of higher phase velocity in linearized-line-limit, the transmitted wave evolves into larger number of solitons. The experimental results can be well explained by use of both linearization approximation for the line near the junction and the theory by Gardner, Greene, Kruskal and Miura. en-copyright= kn-copyright= en-aut-name=NogiShigeji en-aut-sei=Nogi en-aut-mei=Shigeji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=FukuiKiyoshi en-aut-sei=Fukui en-aut-mei=Kiyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=53 end-page=58 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Driving Method of a Spuare Waveform Inverter Circuit Using Power Transistors en-subtitle= kn-subtitle= en-abstract= kn-abstract=In recent years, the development of a high power transistor element is proceeding. A high power inverter circuit using power transistors are finding a good number of applications in induction heating and melting. Turn off time of power transistors occupies 5-lOμs of switching characteristics. A driving method to give base inputs for a half period is widely used for a inverter circuit. But this method has the following defects, the short-circuit current flows through two transistors because the other pair transistors turn on before one pair transistors turn off. So the switching loss is increased, the maximum output and the efficiency are decreased. In this paper, a driving method to give base inputs for the less period as compared with a half period is discussed. Using this method, the foregoing defects is lost and the driving frequency is able to become higher. In addition, it become clear that the square waveform output is given using this method in the case of R-L load. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AgusaToru kn-aut-sei=Agusa kn-aut-mei=Toru aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering. affil-num=2 en-affil= kn-affil=Graduate School of Electrical Engineering. END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=45 end-page=52 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Behavior of Transistor Switching in AC Chopper Circuit en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, an AC chopper circuit, using a power transistor, is described which chops the AC voltage with a commercial frequency. The circuit is composed of a diode bridge and a power transistor in series with a load and capable of adjusting the switching frequency, fc, and the time ratio, T=ton/(ton+toff). The switching frequency and the time ratio of the AC chopper circuit depend on switching-times, that is, delay time, rise time, carrier storage time and fall time, especially in the high frequency. The upper limit of the switching frequency (about 150kHz) and the output characteristics of the circuit are investigated. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSenichiro kn-aut-sei=Nakanishi kn-aut-mei=Senichiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FunabikiShigeyuki kn-aut-sei=Funabiki kn-aut-mei=Shigeyuki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering. affil-num=2 en-affil= kn-affil=Department of Electrical Engineering. affil-num=3 en-affil= kn-affil=Department of Electrical Engineering. END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue= article-no= start-page=29 end-page=36 dt-received= dt-revised= dt-accepted= dt-pub-year=1978 dt-pub=19780225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Parameters for Analysis on Distributed Circuit Properties of Etched Alunimum Oxide Film en-subtitle= kn-subtitle= en-abstract= kn-abstract=The distributed circuit properties based on pores in the etched aluminum oxide film of the electrolytic capacitor have been analysed by the mathematical equation. This paper proposes the selection and the determining method of the parameters appearing in the analysis. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoTatsuma kn-aut-sei=Yamamoto kn-aut-mei=Tatsuma aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoYoshitake kn-aut-sei=Yamamoto kn-aut-mei=Yoshitake aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishidaHideki kn-aut-sei=Nishida kn-aut-mei=Hideki aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YasuharaKiyotaka kn-aut-sei=Yasuhara kn-aut-mei=Kiyotaka aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering. affil-num=2 en-affil= kn-affil=Department of Electrical Engineering. affil-num=3 en-affil= kn-affil=Faculty of Education, Tottori University. affil-num=4 en-affil= kn-affil=Department of Electrical Engineering. END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=53 end-page=64 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=AC Chopper Circuit with Lagging Reactive Load en-subtitle= kn-subtitle= en-abstract= kn-abstract=An ac chopper circuit, which chops an ac voltage in a complete cycle for any lagging reactive load, is devised. The circuit is constructed of two ac-switches composed of power transistors and diodes. The load voltage is smoothly controlled by varying the time ratio of ac-switch. Transistors operate in a highfrequency chopping mode, thereby the ripples of the source current and the load current are easily filtered. Furthermore the input power factor of this model is better than that of the thyristor phase control circuit. In this paper, the construction and the driving method of this model are described. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FunabikiShigeyuki kn-aut-sei=Funabiki kn-aut-mei=Shigeyuki aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSenichiro kn-aut-sei=Nakanishi kn-aut-mei=Senichiro aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=13 cd-vols= no-issue= article-no= start-page=45 end-page=52 dt-received= dt-revised= dt-accepted= dt-pub-year=1979 dt-pub=19790305 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Basic Characteristics of Squarewave Irwerter Circuit with Series R-L Load en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, the steady state operations of the squarewave inverter circuit with a series R-L load are discussed. The circuit consists of transistors and feedback diodes. The basic equation is derived from its equivalent circuit. Solving the basic equation with steady state conditions, the instaneous value of the load current i is derived. The period t(2) for which the current flows from the supply to the load and the period t(l) for which the current feedbacks through diodes from the load to the supply are calculated from (i), and the ratio of t(l) to t(2) is illustrated using power factor of fundamental wave, pf, as a variable. The ratios of transistor mean current I(tr), diode mean current I(D), supply mean current I(s) to the load current I are illustrated using pf as a variable, too. In result, each current ratios to I is shown in simple expressione. The load current can be calculated simply using the coefficient reading off the figure. In addition, it becomes clear from the figure that the load current is scarcely influenced by the harmonic voltage in less than 0.8 of pf. The ratio t(2)/(t(1)+t(2)) calculated in squarewave voltage, shows the limit of pulse width control whose out put voltage is the squarewave. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=AgusaToru kn-aut-sei=Agusa kn-aut-mei=Toru aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Graduate School of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=61 end-page=66 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=An Asynchronous Delay Line for PAM Signal en-subtitle= kn-subtitle= en-abstract= kn-abstract=An asynchronous delay line for PAM signal having controlled delay capability is proposed. The delay line in a cascaded chain of identical memory cells. Each sample of the sequence of the input PAM signals passes or is shifted in particular cell depending on whether the succeeding cell is empty or not. A cell is composed of two memory capacitors with the peripheral control circuits. In this paper, especially, an example of the circuit for cell is shown and its several characteristics are discussed. At the end, some experimental results are given. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoTakuji kn-aut-sei=Okamoto kn-aut-mei=Takuji aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoHideki kn-aut-sei=Yamamoto kn-aut-mei=Hideki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electronics affil-num=3 en-affil= kn-affil=Department of Electronics END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=2 article-no= start-page=55 end-page=61 dt-received= dt-revised= dt-accepted= dt-pub-year=1976 dt-pub=19760127 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A New Application of Transient Recorder to Magnetic Measurements (Part I: Core Loss Measurement at Very Low Frequencies) en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new method have been developed based upon analogue-to-digital conversion techniques and memories. The method involves the scaling of operating frequency from "real" to "optimum" for the power loss measurement. The advantages of using this techniques are as follows: (1) extreme availability at lower frequency region, (2) high accuracy and high stability, (3) simple measuring procedure, (4) digital indication. This method can be measured the power losses over the frequency range 0.1Hz to 1kHz for magnetic circuit and d.c. to 1kHz in such a purely resistive circuit. We estimate the accuracy of this core loss measuring system within 1.0% over all these frequency range. Using this system, specific core losses of the various grades of silicon iron have been measured in the frequency range 0.1Hz to 200Hz. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MatsubaraKazunori kn-aut-sei=Matsubara kn-aut-mei=Kazunori aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanoMasanori kn-aut-sei=Nakano kn-aut-mei=Masanori aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=5 cd-vols= no-issue=1 article-no= start-page=31 end-page=35 dt-received= dt-revised= dt-accepted= dt-pub-year=1970 dt-pub=19700901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of Warren's Fluidic Counter en-subtitle= kn-subtitle= en-abstract= kn-abstract=Though the Warren's fluidic counter has a very simple construction, the matching problems of the main jet supply pressure with the input pulse may take place and so there may be some working conditions under which this counter cannot work. Up to now, these matching problem have been hardly investigated. In this study the following things were systematically investigated : the static and dynamic characteristics of the memory and the control flip-flops with different geometric parameters, the behavior of the counter which are constructed by two of them, and finally the fow in the counter. The obtained results are as follows : (1) Under some clear and accurate conditions, the Warren's counter works satisfactory without any au iliary circuit. (2) In the control part, the input pulse flow don't reattach on any side wall, but branches into both output ports. (3) The necessary condition under which the Warren's counter behaves successfully is as follows : (1-2α)Q(i)>Q(ms), where α is the distribution factor of the control part, is the input pulse flow rate and is the switching control flow rate of the memory part. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WadaTsutomu kn-aut-sei=Wada kn-aut-mei=Tsutomu aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=ShimizuAkira kn-aut-sei=Shimizu kn-aut-mei=Akira aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Industrial Science affil-num=2 en-affil= kn-affil=Department of Industrial Science END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=65 end-page=73 dt-received= dt-revised= dt-accepted= dt-pub-year=1969 dt-pub=19690901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=On the Speed Control of a Three Phase Squirrel Cage Induction Motor Controlled by a Variable Frequency Three Phase Thyristor Inverter en-subtitle= kn-subtitle= en-abstract= kn-abstract=As one of the wide application of thyristor circuits, the inverter has a promising future and has been investigated vigorously. On the speed control of a squirrel cage induction motor by using a variable frequency thyristor inverter, although few papers have been presented, there seems to be many problems to be solved imminently. In this paper, the stability of performance of a thyristor inverter on this theme has been confirmed and some particular points with relation to practical use also have been discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=2 article-no= start-page=107 end-page=118 dt-received= dt-revised= dt-accepted= dt-pub-year=1974 dt-pub=19741225 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Dynamic Design of a Tunnel Diode Transistor Combined Circuit en-subtitle= kn-subtitle= en-abstract= kn-abstract=The dynamic design of a tunnel-diode-transistor combined circuit and the applied pulse circuits are discussed. The combined circuit, in which a tunnel diode is connected in parallel with the collector junction of a transistor, is used. The dynamic design procedure is considerably simplified by describing the transient behavior of a tunnel diode with a set of approximate expressions and by the help of a selfanalog simulator. This circuit is capable of carrying out both memory and majority logic operations, and serves as a basic unit for several different pulse circuits, such as a mcnostable circuit, a frequency divider, a ring counter, etc. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoTakuji kn-aut-sei=Okamoto kn-aut-mei=Takuji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronics affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=8 cd-vols= no-issue=1 article-no= start-page=1 end-page=14 dt-received= dt-revised= dt-accepted= dt-pub-year=1973 dt-pub=19730720 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Experimental Studies of Various Factors Affecting Minor Loop Hysteresis Loss en-subtitle= kn-subtitle= en-abstract= kn-abstract=When the distorted flux is induced in a magnetic circuit, the minor loops arise sometimes inside the major hysteresis loop. The area, accordingly the hysteresis loss of the minor loop,is affected by its amplitude and position, by the maximum flux density, by the quality of material, etc.. In this paper, we describe the experimental studies of the factors on the minor loop hysteresis loss. A method of getting the displacement factor of a minor loop which is placed at arbitrary position and has any amplitude is developed from our experimental results. Using this method, the core losses caused by the distorted flux can be calcuLated within the error less than three percent, even if the amplitude of the minor loop becomes near to the amplitude of the major loop. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanoMasanori kn-aut-sei=Nakano kn-aut-mei=Masanori aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=2 article-no= start-page=85 end-page=88 dt-received= dt-revised= dt-accepted= dt-pub-year=1972 dt-pub=19721013 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A New Representation of Distorted Wave Forms en-subtitle= kn-subtitle= en-abstract= kn-abstract=A new method for representing distorted wave forms is investigated. The method suggested by us is a modified vector symbolic method. It has been hitherto thought that the vector symbolic method cannot be applied to the distorted waves, because the rotating speeds of each harmonic vector are not identical. Representing the argument of the n-th harmonic vector by l/n times as large as the phase angle of the harmonic component, the relative positions of respective harmonic vectors are invariable wherever the standard vector is put, and the wave shape can be deduced from the vector diagram. We found various correspondences between the wave forms and the vector diagrams. Therefore, the wave shape can be estimated from the vector diagram, and the mutual relationships between two wave forms can also be known. In electric or magnetic circuits, the causes of distorted wave forms are in general obvious. Therefore, there are very often the fixed relationships between the amplitudes and phase angles of the harmonics. Further, in polyphase a.c. circuits, there are often the fixed relationships between corresponding harmonics in the wave forms of the respective phases. When the wave forms of those circuits are discussed, the new method investigated in this paper may offer a useful key. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=1 article-no= start-page=25 end-page=29 dt-received= dt-revised= dt-accepted= dt-pub-year=1972 dt-pub=19720601 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Response of Electromagnetic Deflection for CRT Display en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the CRT display system of high-speed electromagnetic deflection, the tendency to amplifier saturation should not be neglected. We first show the limitation to the linear characteristics of input-output response and the response time under the saturation condition in this system. We try to improve the frequency-characteristics of the amplifier by making the load resistance constant and the feedback-paths partially positive, and reduce the L/R value of the load circuit by adopting the mutually-coupled yokecoils and the low-current amplifier. As the result, it is suggested that a low-power dissipation and highspeed response electromagnetic deflection system can be constructed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SanoHiroya kn-aut-sei=Sano kn-aut-mei=Hiroya aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanadaYoshihiro kn-aut-sei=Tanada kn-aut-mei=Yoshihiro aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electronic Engineering affil-num=2 en-affil= kn-affil=Department of Electronic Engineering END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=67 end-page=82 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis on Magnetic Characteristics of Three-Phase Core-Type Transformers (Part I: Fundamental Equations and Linear Solutions) en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, we report the procedure to analyse magnetic circuits and give the linear solutions on magnetic characteristics of the three-phase core-type transformer which is composed of the complicated magnetic paths. First, we explain the construction of cores investigated and normalize the sizes of a core. To analyse these magnetic circuits, we introduced the electrical eqcuivalent circuits and obtained the general fundamental equations for each core. Then, we drew the linear-numerical solutions using an electronic computer, and cleared the relationships between the sizes of a core and the amplitudes and phase angles of fluxes in magnetic paths. Related with the above facts, we investigate the influence of these sizes on the core loss using cores of various quality. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=6 cd-vols= no-issue=1 article-no= start-page=61 end-page=65 dt-received= dt-revised= dt-accepted= dt-pub-year=1971 dt-pub=19710901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis and Design of Parallel Inverter Circuit with Parallel Inductive Load en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, the parallel inverter circuit with the load consisted of resistive load and constant reactive load in parallel, is analyzed taking into acourlt the d-c source reactance. The circuit has a good voltage regulation for the variation of resistive load current, except the vicinity of no load. The design method in using the results of analysis is also discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakesi kn-aut-sei=Fujitsuka kn-aut-mei=Takesi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WakabayashiJiro kn-aut-sei=Wakabayashi kn-aut-mei=Jiro aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Engineering Research Institute, Kyoto University END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=157 end-page=162 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Method of Direct Analog Simulation Using Transistor Switches and its Applications en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the analog circuits for the systms governed by the dilfercntial equations with the coefficients which are a function of one or mOre of the dependent variables, the magnitudes of their circuit elements must be variable in accordance with the nature of the function. Such circuit elements can be realized by means of inserting or removing the additional elements with high speed switches in the analog circuits. Particularly, in the case of varying stepwise this method is effective. But as an analog circuit is regarded as a short-time or repetitive type analyzer, the above switches must be instantaneous operation. In this paper, first, it is made sure by the experiments that some of the transistor switches arc met this condition, and moreover arc very low closed resistance, very high open resistance and neglegible small voltage offsets. Next, the basic technique for the direct analog simulation usiug transistor switches is described about the simple example, i.e. the oscillatory system with varying cross-scctional surge tank. Finally, as its applications, the transient problems of these oscillatory systems arc solved by means of these analog circuits. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoTakuji kn-aut-sei=Okamoto kn-aut-mei=Takuji aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KatoOsamu kn-aut-sei=Kato kn-aut-mei=Osamu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=151 end-page=155 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of Waveform of the R-C Load-Current Controlled by the back to back SCR Pair en-subtitle= kn-subtitle= en-abstract= kn-abstract=The waveform of the load current has been analyzed theoretically on the single-phase series R-C circuit controlled by the back to back SCR pair. And then, the fluctuation of the barmonics calculated by the use of the electronic digital computer, has been discussed as for the firing angles of SCRs and the phase angle of load. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KondoTadao kn-aut-sei=Kondo kn-aut-mei=Tadao aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakanishiSenichiro kn-aut-sei=Nakanishi kn-aut-mei=Senichiro aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Tsuyama Technical College affil-num=4 en-affil= kn-affil=Tsuyama Technical College END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=143 end-page=150 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Modified Type of the Resonant Turn-off SCR D-C Chopper en-subtitle= kn-subtitle= en-abstract= kn-abstract=A modified type of the resonant turn-off d-c chopprr using an auxiliary SCR, compared with its conventional one, has no limitation about its starting and also operates more steadily. Presented in this paper, making a comparison between the modified type and the conventional one, are the circuit analysis and its efficiency measurement from the point of view of overall efficiency, that is, the ratio of the output to the input. Furthermore, some effects of the source impedance, counter emf load, etc. are discussed. As a result, it has been analytically clarified that this modified type is different from the conventional circuit only by one terminal connection of turn-off capacitor, but has the features of uncompounded circuit configuration, no limitation about its starting and more steady operation. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FukumoriKooichi kn-aut-sei=Fukumori kn-aut-mei=Kooichi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=137 end-page=142 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Measured Dissipated-Energy in Switching-off by Electric Contacts en-subtitle= kn-subtitle= en-abstract= kn-abstract=The measurement of the dissipated energy in switching-off has been attempted to make clear the function of spark on electric contacts, which may unfortunately cause the combustible gas, such as propane gas etc, to catch fire and result in fire accidents. By utilizing the "Memoriscope" has been the meaurement carried out and the feature of this method is to provide the information on not only the amount of dissipated energy involved in one action but also on the trace of its instantaneous power which can affect catching fire delicately. Presented in this paper are the discussion of this measuring method and the measured results which are obtained experimentally in order to investigate the dependence of the energy dissipation on variety of contacts, contacts' deterioration and circuit arrangements. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KomatsubaraHitoshi kn-aut-sei=Komatsubara kn-aut-mei=Hitoshi aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KadowakiMasahiko kn-aut-sei=Kadowaki kn-aut-mei=Masahiko aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=Department of Electrical Engineering affil-num=5 en-affil= kn-affil=Identification Section, Oka)'ama Prefectural Police Hq END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=131 end-page=136 dt-received= dt-revised= dt-accepted= dt-pub-year=1968 dt-pub=19680901 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of the A-C Voltage Control Circuit with ParallelConnection of SCR and Reactor en-subtitle= kn-subtitle= en-abstract= kn-abstract=The a-c voltage control circuit, composed of parallel connection of a SCR and a reactor, gives the similar performance as the control circuit of a back to back SCR pair. However, the control characteristics of this circuit is affected by magnetizing characteristics of reactor. In this paper, the circuit with the resistive load has been analyzed by using the approximated models of hysteresis loop of core materials, where the SCR's forward voltage drop is taken into account. The results of the analysis have revealed the facts as follows, I) The control characteristics of the a-c voltage in average value is independent on the magnetizing characteristics of reactors except in the vicinity of minimum output point. But, in effective value, it is not valid. 2) A SCR's forward voltage drop results in the reduction of not only SCR's current but also reactor's current. 3) The a-c output current does not include the d-c component, if the winding resistance of the reactor is negligible. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FujitsukaTakeshi kn-aut-sei=Fujitsuka kn-aut-mei=Takeshi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=WakabayashiJiro kn-aut-sei=Wakabayashi kn-aut-mei=Jiro aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=Engineering Research Institute Kyoto University END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=127 end-page=132 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Method of Automatic Washing for Salt Contaminated Insulators en-subtitle= kn-subtitle= en-abstract= kn-abstract=Described in this paper is a method of automatic washing for salt contaminated insulators. An average value of leakage current through the surface of the pilot insulator in a duration is measured, for this is a function of the quantity of salt adhered and its moisture content. In each cycle, the program signals give one by one the instructions on a start and an end of the integration of leakage current, a detection of the integrated value, a stop of the washing device and a reset of the integrator. The integrator consists of RC circuit and the main detecting part consists of the thyristor whose firing gate voltage is used as a reference value. If the integrator output rises above the firing gate voltage, the pulse signals are made in the signal conversion part at the same time that the thyristor turns on, which are distributed to the pump motor or the electromagnetic valve. Then the insulators on hot-line are washed all together in the appointed duration. Finally, by the various experiments this method was proved to have enough accuracy and reliability in practical use. The conclusions are summarized as follows. (1) An average value of leakage current is justified to be the detecting variable. (2) The RC circuit used as the integrator is proved to be easy in maintenance. (3) Because of the fairly short duration of the detecting action, the integrator is kept in a sufficiently safe condition under expected environment. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KatoOsamu kn-aut-sei=Kato kn-aut-mei=Osamu aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoHideki kn-aut-sei=Yamamoto kn-aut-mei=Hideki aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=120 end-page=126 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of a HaIf-Controlled Single-Phase Bridge Circuit with Free-Wheeling Diode (II) en-subtitle= kn-subtitle= en-abstract= kn-abstract=This paper is presented on the operation of the phase controlled single-phase bridge circuit with a free-wheeling diode, which has capacitance in parallel with the inductive load. Such circuit configuration is frequently met with, for instance, at the time when the more smoothness of d-c voltage is required, the higher reliability of SCR's firing is taken into account or load windings include some capacitance which is not negligible. The capacitance influences not only largely upon SCR's rush current but also significantly upon control characteristics of the circuit such as wave forms, pulsating ratio and power factor etc. Here, the various effects of the capacitance on the circuit performance are discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=96 end-page=110 dt-received= dt-revised= dt-accepted= dt-pub-year=1967 dt-pub=19670401 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Approximate Solution of Nonlinear Oscillatory Circuits (II) en-subtitle= kn-subtitle= en-abstract= kn-abstract=In the preceding paper a new method of analyzing nonlinear periodic oscillations was proposed. In this article a new conception, which is named as the extended harmonic approximation of nonlinear oscillatory circuits, is presented. Method of obtaining transient solutions by the conception is given and various numerical examples are shown. The new conception has merits that a consistent linearization method is given for both steady state and transient state domains and transient solutions are obtained simply. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MineTadao kn-aut-sei=Mine kn-aut-mei=Tadao aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoTatuma kn-aut-sei=Yamamoto kn-aut-mei=Tatuma aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=BabaYukinobu kn-aut-sei=Baba kn-aut-mei=Yukinobu aut-affil-num=3 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoYositake kn-aut-sei=Yamamoto kn-aut-mei=Yositake aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering affil-num=4 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=84 end-page=90 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The RC Network Analyzer Using the High Permittivity Ceramics and its Applications en-subtitle= kn-subtitle= en-abstract= kn-abstract=Described in this paper are the design considerations of the simple element of the two-dimensional RC distributed constant circuit and its applications for the analysis of the transient heat conduction problems in engineering work. This element is formed by coating with the resistive film the upper surface of the high permittivity ceramics plate whose back side to be silvered. In addition to a resistivity of every elementary area within the resistive film, there exists capacitive coupling between the area and ground. This element can be regarded as a typical two-dimensional RC distributed system and utilized as a simulator for the same dimensional heat conduction system. It has a convenience and high accuracy for the analysis of the transient heat conduction problems in engineering work. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MisakiTakayoshi kn-aut-sei=Misaki kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KatoOsamu kn-aut-sei=Kato kn-aut-mei=Osamu aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering, Okayama University affil-num=2 en-affil= kn-affil=Department of Electrical Engineering, Okayama University END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=78 end-page=83 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Analysis of a Half-Controlled Single-Phase Bridge Circuit with Free-Wheeling Diode (1) en-subtitle= kn-subtitle= en-abstract= kn-abstract=The operation, mainly in a steady state, of a half controlled single-phase bridge circuit with a finite inductive load, has been treated analytically. Some operation features of particular bridge circuits are discussed. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=HimeiToyoji kn-aut-sei=Himei kn-aut-mei=Toyoji aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=InoueJyunichi kn-aut-sei=Inoue kn-aut-mei=Jyunichi aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FukumoriKooichi kn-aut-sei=Fukumori kn-aut-mei=Kooichi aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Kurashiki Technical High School END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=70 end-page=77 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Calculation of Circuit Constants for Impulse Voltage Generator by Means of Computer en-subtitle= kn-subtitle= en-abstract= kn-abstract=In this paper, we describe the way to compute circuit constants of the impulse voltage generator by means of the digital computer, when an impulse voltage waveform is given. The definition of waveform is to be revised, and this definition is adopted to our computation. From the results, we can see the influence of revising definition upon circuit constants. We also devised graphs, from which we can easily determine the L-C-R circuit constants. (see Fig.2(a)) en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NakataTakayoshi kn-aut-sei=Nakata kn-aut-mei=Takayoshi aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=IshiharaYoshiyuki kn-aut-sei=Ishihara kn-aut-mei=Yoshiyuki aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MoriyasuTadataka kn-aut-sei=Moriyasu kn-aut-mei=Tadataka aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Mizushima Technical High School END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=63 end-page=69 dt-received= dt-revised= dt-accepted= dt-pub-year=1966 dt-pub=19660331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Approximate Solution of Nonlinear Oscillatory Circuits (I) en-subtitle= kn-subtitle= en-abstract= kn-abstract=The well-known steady state solution of nonlinear oscillatory circuits based on the use of Fourier series, the so-called harmonic balance, is a powerful method because of its wide applicability. Yet, this method has not only difficulties to solve transcendental equations or algebraic equations of higher orders, but gives no transient state solution. The harmonic approximation and the extended harmonic approximation defined in this report are linearization methods which give approximations of steady state and transient state simultaneously. Furthermore the method enables an unification and extension of miscellaneous linearization methods. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=MineTadao kn-aut-sei=Mine kn-aut-mei=Tadao aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=YamamotoTatuma kn-aut-sei=Yamamoto kn-aut-mei=Tatuma aut-affil-num=2 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=BabaYukinobu kn-aut-sei=Baba kn-aut-mei=Yukinobu aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Electrical Engineering affil-num=2 en-affil= kn-affil=Department of Electrical Engineering affil-num=3 en-affil= kn-affil=Department of Electrical Engineering END start-ver=1.4 cd-journal=joma no-vol=27 cd-vols= no-issue=1 article-no= start-page=1 end-page=10 dt-received= dt-revised= dt-accepted= dt-pub-year=1992 dt-pub=19921125 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Direct Patterning of Ceramic Circuit Board with Q-Switched Nd:YAG Laser en-subtitle= kn-subtitle= en-abstract= kn-abstract=Direct patterning of copper coated ceramic circuit board is experimentally investigated with Q-switched Nd:YAG laser in order to shorten the time of the trial manufacture of electronic circuit board and to adapt the flexible design change. It is pointed out that the fast direct patterning the speed of which reaches about 100 mm/s is possible if the repetition frequency and the average power are selected properly. Furthermore cutting off and/or drilling of ceramic board are also possible under the condition that the repetition frequency is less than 3kHz. This technique makes it possible the mask1ess patterning of ceramic circuit board which has been widely used recently in place of conventional glass-epoxy or phenolic resin circuit board, and it leads to the shorter time limit of delivery as compared with the conventional end-milling method. en-copyright= kn-copyright= en-aut-name=UnoYoshiyuki en-aut-sei=Uno en-aut-mei=Yoshiyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KubotaShin-ichiro en-aut-sei=Kubota en-aut-mei=Shin-ichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=NakajimaToshikatsu en-aut-sei=Nakajima en-aut-mei=Toshikatsu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=OgataKojiro en-aut-sei=Ogata en-aut-mei=Kojiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=TadaNobuhiko en-aut-sei=Tada en-aut-mei=Nobuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering affil-num=3 en-affil= kn-affil=Department of Mechanical Engineering affil-num=4 en-affil= kn-affil=Hitachi Construction Machinery Co., Ltd. affil-num=5 en-affil= kn-affil=Hitachi Construction Machinery Co., Ltd. END start-ver=1.4 cd-journal=joma no-vol=35 cd-vols= no-issue=1-2 article-no= start-page=21 end-page=28 dt-received= dt-revised= dt-accepted= dt-pub-year=2001 dt-pub=20010327 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Laser Welding of Slices of Magnetic Circuit en-subtitle= kn-subtitle= en-abstract= kn-abstract=In electric power industry, there is a problem of achieving stable joint in different components using high productive and efficient technologies. One type of these components is packages of slices for magnetic circuit of electric motors, transformers etc., which need reliable means for their fixing. Laser welding is proposed to solve this problem as an alternative for existing technologies. The development of the laser welding process is presented based on process simulation, study of heat history and comparison with experimental results. Laser beam additional scanning technique is proposed to improve the quality and efficiency of the joining operation. en-copyright= kn-copyright= en-aut-name=S.kovalenkoVolodymyr en-aut-sei=S.kovalenko en-aut-mei=Volodymyr kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=UnoYoshiyuki en-aut-sei=Uno en-aut-mei=Yoshiyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=OkamotoYasuhiro en-aut-sei=Okamoto en-aut-mei=Yasuhiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=AnyakinM. en-aut-sei=Anyakin en-aut-mei=M. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=LutayA. en-aut-sei=Lutay en-aut-mei=A. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=ShubulKhaled Al. en-aut-sei=Shubul en-aut-mei=Khaled Al. kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering (Now at Laser Technology Research Institute, National Technical affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering affil-num=3 en-affil= kn-affil=Department of Mechanical Engineering affil-num=4 en-affil= kn-affil=Laser Technology Research Institute, National Technical University of Ukraine affil-num=5 en-affil= kn-affil=Laser Technology Research Institute, National Technical University of Ukraine affil-num=6 en-affil= kn-affil=Laser Technology Research Institute, National Technical University of Ukraine END start-ver=1.4 cd-journal=joma no-vol=33 cd-vols= no-issue=2 article-no= start-page=97 end-page=103 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=19990427 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Inspection Method by Comparing CAD Figure with Processed Image en-subtitle= kn-subtitle= en-abstract= kn-abstract=We propose the recognition method of bridge soldering base metal on the circuits by comparing CAD figure and input image of image processing to locate the soldering iron tip accurately to secure the high quality Firstly, three dimensional CAD assembly drawing of circuits which are assembled perpendicularly in each other is projected on an imaginary two dimensional screen which is vertical to the optical axis of the camera The projected image is used as the standard CAD figure to inspect the location of the bridge soldering base metal. The positions among the bridge soldering base metals show the line state. So this line (connecting line) is used as the reference line to inspect the location of the bridge soldering base metal. The characteristics of the standard figure are represented by the connecting line, edge line and center points of base metal. Secondly, the position and gradient of connecting line among bridge soldering base metals in the input image is estimated. And the position of base metal and assembly accuracy of circuit units are calculated by comparing the shape and position of each base metal with its standard figure based on the connecting line Furthermore, the length between the opposite edges of the base metals are calculated to inspect the positions and the assemble accuracy of circuit units. en-copyright= kn-copyright= en-aut-name=JindaiMitsuru en-aut-sei=Jindai en-aut-mei=Mitsuru kn-aut-name=神代充 kn-aut-sei=神代 kn-aut-mei=充 aut-affil-num=1 ORCID= en-aut-name=OsakiHirokazu en-aut-sei=Osaki en-aut-mei=Hirokazu kn-aut-name=大崎紘一 kn-aut-sei=大崎 kn-aut-mei=紘一 aut-affil-num=2 ORCID= en-aut-name=KajiharaYasuhiro en-aut-sei=Kajihara en-aut-mei=Yasuhiro kn-aut-name=梶原康博 kn-aut-sei=梶原 kn-aut-mei=康博 aut-affil-num=3 ORCID= en-aut-name=MunesawaYoshiomi en-aut-sei=Munesawa en-aut-mei=Yoshiomi kn-aut-name=宗澤良臣 kn-aut-sei=宗澤 kn-aut-mei=良臣 aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=TanoMasakazu kn-aut-sei=Tano kn-aut-mei=Masakazu aut-affil-num=5 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoKatsuyuki kn-aut-sei=Okamoto kn-aut-mei=Katsuyuki aut-affil-num=6 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishinoAkira kn-aut-sei=Nishino kn-aut-mei=Akira aut-affil-num=7 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OkamotoAsao kn-aut-sei=Okamoto kn-aut-mei=Asao aut-affil-num=8 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=NishimoriNaoki kn-aut-sei=Nishimori kn-aut-mei=Naoki aut-affil-num=9 ORCID= affil-num=1 en-affil= kn-affil=Graduate School of Okayama University affil-num=2 en-affil= kn-affil=Faculty of Engineering, Okayama University affil-num=3 en-affil= kn-affil=Faculty of Engineering, Okayama University affil-num=4 en-affil= kn-affil=Faculty of Engineering, Okayama University affil-num=5 en-affil= kn-affil=Faculty of Engineering, Okayama University affil-num=6 en-affil= kn-affil=Omron Okayama Co., Ltd. affil-num=7 en-affil= kn-affil=Omron Okayama Co., Ltd. affil-num=8 en-affil= kn-affil=Omron Co., Ltd. affil-num=9 en-affil= kn-affil=Omron Co., Ltd. END start-ver=1.4 cd-journal=joma no-vol=14 cd-vols= no-issue=2 article-no= start-page=135 end-page=139 dt-received= dt-revised= dt-accepted= dt-pub-year=2004 dt-pub=20040331 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Development of stepping measurement device for evaluation of and training in walking kn-title=歩行能力の評価･訓練のための足踏み測定器の開発 en-subtitle= kn-subtitle= en-abstract=Although gait training equipment such as the bicycle ergometer and treadmill exists for patients whose walking ability is high, there is no appropriate gait training method or training instrument for patients whose walking ability has become impaired, who often use a cane or walker, etc. in the course of daily life. In the case of gait training for persons whose walking ability involves impaired locomotion, there is always the danger of a fall. Consequently, a caregiver is required, and the effect of the training is cut by half because the patient's anxiety about falling is exacerbated. Slow stepping affords strengthening and balance training of the leg muscles for patients whose walking ability has become low, and walking ability is improved. However, whether such training appropriately carries out stepping and the degree of the effect of such training has not been evaluated. Therefore, we have developed a stepping measurement device that monitors stepping for evaluation and training of walking ability. This system consists of two mat switches for stepping, a measuring circuit for stepping detection, and a book-sized personal computer with a PC card-type AD converter. This system can detect a left or right single stance phase and a double stance phase relative to the ON, OFF condition of the mat switch. After measurement, the following items are analyzed and displayed: ・number of steps, ・average time of double stance phase, ・the average time of single stance phase, and so on. Finally, we measured the stepping of subjects whose walking ability is low, and showed the relationship between daily walking conditions and stepping conditions. The effectiveness of this system was considered in light of the results. kn-abstract=日常生活で杖をついたり,老人車などを押したりなど歩行能力の低下した人に対する簡便･安価で効果的な歩行訓練方法,訓練機器はない｡歩行能力の低下した人が体の移動を伴う歩行訓練をする場合,常に転倒の危険性を伴うために,介護者が必要であったり,転倒の不安のために動作が消極的になり,訓練の効果が半減する｡これに対して,ゆっくりとした足踏みは歩行能力の低下した人に対しては下肢筋力の強化,バランス訓練となり,歩行能力を向上させる｡しかし,足踏みが適切におこなわれているか,訓練の効果の程度についての評価ができなかった｡そこで,歩行能力の評価･訓練のために足踏み状態をモニタすることができる足踏み測定器を開発した｡本装置は,足踏みをするマット2枚およびノートパソコンなどから構成されている｡足踏み中における両脚立脚,左右それぞれの片脚遊脚の状態をマットスイッチのON,OFF状態にて判断する｡測定後,歩数,平均両脚立脚時間,平均片肺立脚時間などの解析･表示を行う｡最後に歩行能力が低下した被験者の足踏みを測定して,杖歩行など日常の歩行状態と足踏みの状態との関係を示し,足踏み測定の有効性についても検討した｡ en-copyright= kn-copyright= en-aut-name=NakamuraTakao en-aut-sei=Nakamura en-aut-mei=Takao kn-aut-name=中村隆夫 kn-aut-sei=中村 kn-aut-mei=隆夫 aut-affil-num=1 ORCID= en-aut-name=KonishiHitoshi en-aut-sei=Konishi en-aut-mei=Hitoshi kn-aut-name=小西均 kn-aut-sei=小西 kn-aut-mei=均 aut-affil-num=2 ORCID= en-aut-name=TsujiHiroaki en-aut-sei=Tsuji en-aut-mei=Hiroaki kn-aut-name=辻博明 kn-aut-sei=辻 kn-aut-mei=博明 aut-affil-num=3 ORCID= en-aut-name=KusuharaToshimasa en-aut-sei=Kusuhara en-aut-mei=Toshimasa kn-aut-name=楠原俊昌 kn-aut-sei=楠原 kn-aut-mei=俊昌 aut-affil-num=4 ORCID= en-aut-name=YamamotoYoshitake en-aut-sei=Yamamoto en-aut-mei=Yoshitake kn-aut-name=山本尚武 kn-aut-sei=山本 kn-aut-mei=尚武 aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部保健学科放射線技術科学専攻 affil-num=2 en-affil= kn-affil=岡山市立せのお病院整形外科 affil-num=3 en-affil= kn-affil=岡山県立大学短期大学部健康福祉学科生活福祉専攻 affil-num=4 en-affil= kn-affil=岡山大学医学部保健学科放射線技術科学専攻 affil-num=5 en-affil= kn-affil=岡山大学医学部保健学科放射線技術科学専攻 en-keyword=足踏み (stepping) kn-keyword=足踏み (stepping) en-keyword=歩行訓練 (walking training) kn-keyword=歩行訓練 (walking training) en-keyword=歩行能力 (walking ability) kn-keyword=歩行能力 (walking ability) en-keyword=高齢者 (elder people) kn-keyword=高齢者 (elder people) END start-ver=1.4 cd-journal=joma no-vol=2008 cd-vols= no-issue=1 article-no= start-page=191 end-page=197 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=20081211 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effectiveness of Instruction using Electronic Circuit Simulation Software en-subtitle= kn-subtitle= en-abstract= kn-abstract=Traditional teaching (lecturing) method on the design of electronic circuit provides learners with little satisfaction, because they cannot check and confirm the validity of electronic circuit they have designed. A better way to acquire design skills is to actually make the designed electronic circuit and test the validity of design. In spite of the usefulness of such a practical approach, it has a disadvantage that there is only limited time for teaching (lecturing) and it is difficult to fabricate electronic circuit, perform electronic measurement, and test the validity of design in the limited lecture period. An alternative to overcome these disadvantages is to use simulation software that enables learners (students) to operate functionally the designed electronic circuit and verify the appropriateness of design. The aim of this study was to examine the usefulness of simulation approach and clarify some problems related to such an approach. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhtaYukio kn-aut-sei=Ohta kn-aut-mei=Yukio aut-affil-num=1 ORCID= en-aut-name=MurataAtsuo en-aut-sei=Murata en-aut-mei=Atsuo kn-aut-name=村田厚生 kn-aut-sei=村田 kn-aut-mei=厚生 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Department of Intelligent Mechanical Systems, Division of Industrial Innovation Sciences affil-num=2 en-affil= kn-affil=Department of Intelligent Mechanical Systems, Division of Industrial Innovation Sciences END start-ver=1.4 cd-journal=joma no-vol=103 cd-vols= no-issue=4 article-no= start-page=257 end-page=266 dt-received= dt-revised= dt-accepted= dt-pub-year=1991 dt-pub=1991 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=The effects of SMA-SOD on brain damage induced by complete global brain ischemia in dogs kn-title=イヌの完全全脳虚血後の脳障害に及ぼすSMA-SOD の効果に関する実験的研究 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The effects of stylene maleinic acid butyl ester superoxide dismutase (SMA-SOD) on the brain damage induced by ischemia were studied in dogs. Eighteen minutes of cerebral ischemia was produced by clamping the ascending aorta with aorta-atrial and aorta-femoral vein bypass circuit. SMA-SOD(10mg/kg) was administered just after the initiation of recirculation. Dogs were divided into, control group and SMA-SOD group. In each group, cerebral blood flow (CBF) and intracranial pressure (ICP) were measured for 7 hours after ischemia, and neurologic outcome was evaluated up to 7 days after ischemia. Furthermore, extravasation of evans blue dye (EB, 100mg/kg) were observed 30 minutes after ischemia. SMA-SOD increased CBF during the hyperemia, and improved both delayed post-ischemic hypoperfusion (DHP) and neurologic outcomes. Extravasation of EB were recognized in the control group, but not in the SMA-SOD group. In conclusion, vasogenic edema might play a role in the elevation of ICP besides the hyperemia, and SMA-SOD improved neurologic outcome by prevention of edema, and improvement of DHP. Furthermore, free radicals might play a role in the appearance of ischemic brain damage. en-copyright= kn-copyright= en-aut-name=TakedaYoshimasa en-aut-sei=Takeda en-aut-mei=Yoshimasa kn-aut-name=武田吉正 kn-aut-sei=武田 kn-aut-mei=吉正 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部麻酔・蘇生学教室 en-keyword=SMA-SOD kn-keyword=SMA-SOD en-keyword=神経学的予後 kn-keyword=神経学的予後 en-keyword=血流脳関門 kn-keyword=血流脳関門 en-keyword=遅発性脳血流減少 kn-keyword=遅発性脳血流減少 en-keyword=イヌ kn-keyword=イヌ END start-ver=1.4 cd-journal=joma no-vol=103 cd-vols= no-issue=1-2 article-no= start-page=199 end-page=207 dt-received= dt-revised= dt-accepted= dt-pub-year=1991 dt-pub=1991 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Early increase in blood brain barrier permeability to evans blue dye after complete global brain ischemia in dogs kn-title=イヌの完全全脳虚血後の血液脳関門の透過性に関する研究 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The influence of reperfusion after complete global brain ischemia (CGBI) on blood brain barrier (BBB) permeability to evans blue dye (EB) was studied in dogs. The various durations of CGBI, from 10 to 18 minutes, were produced by clamping the ascending aorta with the aorta to the right atrium and the aorta to the femoral vein bypass circuit. Dogs were divided into four groups according to the duration of CGBI : dogs in group A, B, C, and D(n=6, in each group) suffered 10, 12, 15, and 18 minutes of CGBI, respectively. EB was injected 15 minutes after the reperfusion, and extravasation of EB in the cerebral cortex. thalamus, hippocampus, cerebellum and the brain stem were observed 30 minutes after the reperfusion. In this study, cerebral blood flow (CBF) and intracranial pressure (ICP) were also measured for the first 20 minutes after the reperfusion. Extravasation of EB were observed in three dogs except for group A, and a tendency toward extravasation of EB in the cerebellum was recognized in group C and D. Reactive hyperemia and increase in ICP within 20 minutes after the reperfusion were also observed. In conclusion, not only ischemia but also the reactive hyperemia might increase BBB permeability. en-copyright= kn-copyright= en-aut-name=KurodaTomonori en-aut-sei=Kuroda en-aut-mei=Tomonori kn-aut-name=黒田友則 kn-aut-sei=黒田 kn-aut-mei=友則 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部麻酔・蘇生学教室 en-keyword=完全全脳虚血 kn-keyword=完全全脳虚血 en-keyword=再灌流 kn-keyword=再灌流 en-keyword=血液脳関門 kn-keyword=血液脳関門 en-keyword=エバンスブルー kn-keyword=エバンスブルー en-keyword=イヌ kn-keyword=イヌ END start-ver=1.4 cd-journal=joma no-vol=104 cd-vols= no-issue=3-4 article-no= start-page=267 end-page=286 dt-received= dt-revised= dt-accepted= dt-pub-year=1992 dt-pub=1992 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Changes of the afterdischarge threshold during the limbic or neocortical kindling in cats kn-title=辺縁系および新皮質キンドリング形成に伴う後発射誘発閾値の変化 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The afterdischarge threshold (ADT) in the limbic foci is reduced during limbic kindling. However, the changes of the ADT in the remote brain regions which receives no kindling stimuli remain unknown. To investigate the progressive neuronal changes during kindling, changes of the DAT were observed in the primary kindled sites and seconday unstimulated sites (pyriform cortex : PC and entorhinal cortex : EC) in amygdala (AM), hippocampal (HIPP) or neocortical (anterior portion of the suprasylvian gyrus : SS) kindled cats. The seizur threshold rapidly decreased, not only in the primary focus (AM or HIPP) but also in the remote brain regions (PC and EC), in the early process of acquisition of the limbic epileptogenesis and that the reduction of the ADT was closely related to the development of seconday epileptogenesis. In perticular, the PC could acquire the neuronal hypere xcitability during limbic kindling. However, in contrast to limbic foci, no signgificant changes of the ADT in either primary focus (SS) or secondary focus (PC and EC) was observed. This suggest-ed that the necortical seizure develops due to another neuronal mechanism which differs from the mechanism of the limbic seizure. en-copyright= kn-copyright= en-aut-name=SaneiToshifumi en-aut-sei=Sanei en-aut-mei=Toshifumi kn-aut-name=實井俊典 kn-aut-sei=實井 kn-aut-mei=俊典 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部神経精神医学教室 en-keyword=kindling kn-keyword=kindling en-keyword=afterdischarge threshold kn-keyword=afterdischarge threshold en-keyword=transfer phenomenon kn-keyword=transfer phenomenon en-keyword=epilepsy kn-keyword=epilepsy en-keyword=cat kn-keyword=cat END start-ver=1.4 cd-journal=joma no-vol=104 cd-vols= no-issue=11-12 article-no= start-page=1159 end-page=1171 dt-received= dt-revised= dt-accepted= dt-pub-year=1992 dt-pub=199212 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Mechanism of inhibitory effect of dorsal column stimulation (DCS) on spasticity : Role of presynaptic inhibition in monosynaptic reflex kn-title=Spasticity に対する脊髄硬膜外刺激の作用メカニズムに関する研究 en-subtitle= kn-subtitle= en-abstract= kn-abstract=To investigate the mechanism of the inhibitory effect of dorsal column stimulation (DCS) on the monosynaptic reflex, excitability of the Ia fiber terminal was measured by Wall's method before, during and after epidural spinal cord stimulation. The experiment was performed under general anesthesia on five normal cats and five cats which had undergone hemisection of the lower thoracic cord more than three weeks before the experiment. Bipolar silver-ball electrodes were placed epidurally on the midline of the thoracic cord, caudal to the hemisected site. During and after DCS, increase of the excitability of the Ia fiber terminal was observed in both normal and hemisected cats, suggesting that the presynaptic inhibition at the Ia fiber terminal plays an important role in inhibition of the monosynaptic reflex. Moreover, this excitability change was maintained more than ten minutes after cessation of DCS, compatible with a clinical observation that the inhibitory effect of DCS on spasticity often continues after turning off the stimulating system. However the mechanism of this after-effect is unknown. en-copyright= kn-copyright= en-aut-name=MunedaKouji en-aut-sei=Muneda en-aut-mei=Kouji kn-aut-name=棟田耕二 kn-aut-sei=棟田 kn-aut-mei=耕二 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部脳神経外科学教室 en-keyword=spasticity kn-keyword=spasticity en-keyword=dorsal column stimulation kn-keyword=dorsal column stimulation en-keyword=monosynaptic reflex kn-keyword=monosynaptic reflex en-keyword=presynaptic inhibition kn-keyword=presynaptic inhibition en-keyword=primary afferent depolarization kn-keyword=primary afferent depolarization END start-ver=1.4 cd-journal=joma no-vol=104 cd-vols= no-issue=3-4 article-no= start-page=221 end-page=234 dt-received= dt-revised= dt-accepted= dt-pub-year=1992 dt-pub=1992 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Effects of kainic acid, quisqualic acid and their antagonist on rat electrocorticoprams and on monoamine metabolite levels in rat striatum estimated by brain dialysis method kn-title=カイニン酸, キスカル酸およびその拮抗薬投与にともなう脳波および線条体モノアミン代謝産物の変動 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The CNS action of kanie acid (KA), quisqualic acid (QA) and 1-(4-chlorobenzoyl)-piperazine-2, 3-dicarboxylic acid (pCB-PzDA) was investigated in male Sprague Dawley rats, and their effects on monoamina metabolite levels in rat striatum were studied using brain dialysis. Intracerebroventricularly injected KA and QA (100nmol) induced spike discharges, and pCB-PzDA (100nmol) suppressed electrocorticograms (ECoG) for 1 hour. pCB-PzDA aggravated KA induced spike discharges and inhibited QA-induced spike discharges. Dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) levels increased transitorily by injection of 100nmol and continuously by injection of 100nmol of KA. KA increased the 5-hydroxyindoleachtic acid (5-HIAA) level 2 hours after the administration dose-dependently. Though 10nmol of QA increased the HVA level slightly, 100nmol of QA increased the DOPAC, HVA and 5-HIAA levels. Though 100nmol of pCB-PzDA increased the DOPAC and HVA levels, it inhibited the increases in DOPAC, HVA and 5-HIAA levels induced by KA. On the other hand,pCB-PzDA inhibited the increases in DOPAC, HVA and 5-HIAA levels induced by QA for 1 hour, after which the DOPAC and HVA levels increased additively. These finding suggest that pCB-PzDA acts not only as a non-NMDA antagonist but also on dopaminergic neurons directly. en-copyright= kn-copyright= en-aut-name=YamamotoMasatsune en-aut-sei=Yamamoto en-aut-mei=Masatsune kn-aut-name=山本正恒 kn-aut-sei=山本 kn-aut-mei=正恒 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部脳代謝研究施設機能生化学部門 en-keyword=kainic acid kn-keyword=kainic acid en-keyword=quisqualic acid kn-keyword=quisqualic acid en-keyword=pCB-PzDA kn-keyword=pCB-PzDA en-keyword=brain dialysis kn-keyword=brain dialysis en-keyword=monoamine metabolism kn-keyword=monoamine metabolism END start-ver=1.4 cd-journal=joma no-vol=104 cd-vols= no-issue=7-8 article-no= start-page=843 end-page=852 dt-received= dt-revised= dt-accepted= dt-pub-year=1992 dt-pub=199208 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Analysis of suppressor T cells induced in long-term human allogeneic mixed lymphocyte culture kn-title=長期リンパ球混合培養で誘導される抑制性T細胞の免疫学的解析 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Suppressor T cells (Ts) may play an important role in the regulation of immunological responses. Ts may play a role in the long-term acceptance of an allogeneic organ graft and the beneficial effects of donor-specific blood transfusions on subsequent transplant survival. The population of Ts induced in mixed lymphocyte culture (MLC) was analyzed, and the mechanism underlying the suppressor activity was examined. The Ts generated in 10-day MLC were found to belong to the OKT8(+) subset and inhibited both mixed lymphocyte reaction (MLR) and cell-mediated lympholysis. These Ts inhibited MLR in an antigen-specific manner, but failed to alter the kinetics of the MLR. Furthermore, these Ts inhibited the production of endogenous interleukin-2 and exerted a suppressive effect only when added early in the culture. In condition, the precise target of Ts generated in 10-day MLC might be the earliest responding T helper clone. en-copyright= kn-copyright= en-aut-name=TsuboiKatsutoshi en-aut-sei=Tsuboi en-aut-mei=Katsutoshi kn-aut-name=壺井克敏 kn-aut-sei=壺井 kn-aut-mei=克敏 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部第一外科学教室 en-keyword=抑制性T細胞 kn-keyword=抑制性T細胞 en-keyword=リンパ球混合培養 kn-keyword=リンパ球混合培養 en-keyword=mixed lymphocyte reaction kn-keyword=mixed lymphocyte reaction en-keyword=cell-mediated lympholysis kn-keyword=cell-mediated lympholysis END start-ver=1.4 cd-journal=joma no-vol=10 cd-vols= no-issue=1 article-no= start-page=15 end-page=22 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=19991220 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Variations of parameters of bioelectrical impedance during upper limb movement kn-title=上肢運動に伴う生体電気インピーダンスのパラメータの変動 en-subtitle= kn-subtitle= en-abstract=We have proposed new biodynamic analysis methods using bioelectrical impedance. Variations of human limb electrical impedance during biodynamics were caused by variations of equivalent cross sectional area of muscle and variations of blood volume. However these variations could not be directly measured. Therefore quantitative discussions about relation between the impedance and these variations have been insufficient. In this work, we explained variations of the impedance with variations of parameters of an equivalent circuit. The model of impedance was Cole-Cole type. The equivalent circuit consisted of five individual parameters as follows : extracellular fluid resistance, 'Re', intracellular fluid resistance, 'Ri', characteristic frequency of dispersion, 'fm' and parameters of dispersion of relaxation time, 'α' and 'β'. Impedances of forearm and upper arm were measured with four electrode method during flexion and extension of joints in upper limb. The ratio of variations of equivalent series resistance R was linear-approximated using the above mentioned parameters. The influences of parameters on variations of R was confirmed. R was strongly influenced by Re and Ri, However there were differences between influence of Re and that of Ri in difference measured part and difference joint movement. This showed the conditibn of the muscle. In case of the maximum flexion of the elbow joint, R of upper arm was influenced by fm. This means that a polarization of cell membrane changes and influences impedance during movement. These results are significant in evaluation of biodynamics including difference of strength of movement and condition of exhaustion. kn-abstract=これまでに生体電気インピーダンスを用いて身体運動の解析を行ってきた。インピーダンスの変動原因は測定部位の等価断面積変化および貯血量変化と説明できるが，直接的に断面積変化や貯血量変化を測定することは困難であるため，その変動原因の定量的な検討は不十分であった。そこで，本研究では上肢運動に伴う生体電気インピーダンスの変動原因を生体の等価回路のパラメータの変動で説明する。インピーダンスのモデルはCole－Cole型であり，等価回路は，細胞外液抵抗Re，細胞内液抵抗Ri，分散の特性周波fm fm，緩和時間の分布の程度を表すα，βの独立した5パラメータで表現した。 上肢の肘関節および手関節の屈曲運動野に伴う前腕部および上腕部の電気インピーダンスを測定した。まず，電気インピーダンスの等価直列抵抗Rの変動率をパラメータの変動率で線形近似し，その信頼性と各パラメータ変動のRへの影響を確認した。Rへの影響はReとRiが支配的であるが，測定部位や運動の違いにより，それぞれの影響が異なることを示した。これは測定部位の筋活動状態の違いを表すものである。さらに，肘関節最大屈曲におけるRの変化にはfmの変化が大きく依存しており，上肢運動のインピーダンス変化には細胞膜の分極特性の変化も影響していることを明らかにした。本研究の結果は，運動強度の違いや疲労状態における身体運動評価に有意義である。 en-copyright= kn-copyright= en-aut-name=NakamuraTakao en-aut-sei=Nakamura en-aut-mei=Takao kn-aut-name=中村隆夫 kn-aut-sei=中村 kn-aut-mei=隆夫 aut-affil-num=1 ORCID= en-aut-name=YamamotoYoshitake en-aut-sei=Yamamoto en-aut-mei=Yoshitake kn-aut-name=山本尚武 kn-aut-sei=山本 kn-aut-mei=尚武 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部保健学科放射線技術科学専攻 affil-num=2 en-affil= kn-affil=岡山大学医学部保健学科放射線技術科学専攻 en-keyword=生体電気インピーダンス (bioelectrical impedance) kn-keyword=生体電気インピーダンス (bioelectrical impedance) en-keyword=等価回路 (equivalent circuit) kn-keyword=等価回路 (equivalent circuit) en-keyword=Cole-Cole円弧 (Cole-Cole circular loci) kn-keyword=Cole-Cole円弧 (Cole-Cole circular loci) en-keyword=上肢運動 (upper limb movement) kn-keyword=上肢運動 (upper limb movement) en-keyword=4電極法 (four electrode method) kn-keyword=4電極法 (four electrode method) END start-ver=1.4 cd-journal=joma no-vol=61 cd-vols= no-issue= article-no= start-page=123 end-page=128 dt-received= dt-revised= dt-accepted= dt-pub-year=1990 dt-pub=199009 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Development of stepping measurement device for evaluation of and training in walking kn-title=群性膵炎の発症原因の検索中に発見された小膵癌の検討 en-subtitle= kn-subtitle= en-abstract=Although gait training equipment such as the bicycle ergometer and treadmill exists for patients whose walking ability is high, there is no appropriate gait training mehtod or training instrument for patients whose walking ability has become impaired, who often use a cane or walker, etc. in the course of daily life. In the case of gait training for persons whose walking ability involves impaired locomotion, there is always the danger of a fall. Consequently, a caregiver is required, and the effect of the training is cut by half because the patient's anxiety about falling is exacerbated. Slow stepping affords strengthening and balance training of the leg muscles for patients whose walking ability has become low, and walking ability is improved. However,whether such training appropriately carries out stepping and the degree of the effect of such training has not been evaluated. Therefore, we have developed a stepping measturement device that monitors stepping for evaluation and training of walking ability. This system consists of two mat switches for stepping, a measuring circuit for stepping detection, and a book-sized personal computer with a PC card-type AD converter. This system can detect a left or right single stance phase and a double stance phase relative to the ON, OFF condition of the mat switch. After measurement, the following items are analyzed and displayed : ・number of steps, ・average time of double stance phase, ・the average time of single stance phase, and so on. Finally, we measured the stepping of subjects whose walking ability is low, and showed the relationship between daily walking conditions and stepping conditions. The effectiveness of this system was considered in light of the results. kn-abstract=急性膵炎の回復後その発症原因の検索において発見された小膵癌の3例を報告し，膵炎の発症原因の一つとして膵癌を常に念頭におく必要があることを強調した。またスクリーニング検査および精査において小膵癌を診断する手順について考察を加えた。症例1は初回発作の回復後に，症例2および症例3は再発発作の回復後に急性膵炎の発症原因の検索を目的に紹介された。いずれの症例においても血清腫瘍マーカーは正常植を示し，腹部USおよびCTは腫瘍から尾側の膵管の拡張を示したが腫瘍そのものは描出はできなかった。症例1ではERCP像から膵体部癌を強く疑い，症例2と症例3ではERCP像と細胞診陽性所見から膵頭部癌と確診し，手術を行った。腫瘍の最大径は症例1では0.9cm，症例2では1.5cm，症例3では2.0cmであり，いずれも転移を認めず根治切除可能であった。 en-copyright= kn-copyright= en-aut-name=MatsumotoShuji en-aut-sei=Matsumoto en-aut-mei=Shuji kn-aut-name=松本秀次 kn-aut-sei=松本 kn-aut-mei=秀次 aut-affil-num=1 ORCID= en-aut-name=OchiKoji en-aut-sei=Ochi en-aut-mei=Koji kn-aut-name=越智浩二 kn-aut-sei=越智 kn-aut-mei=浩二 aut-affil-num=2 ORCID= en-aut-name=TanakaJuntaro en-aut-sei=Tanaka en-aut-mei=Juntaro kn-aut-name=田中淳太郎 kn-aut-sei=田中 kn-aut-mei=淳太郎 aut-affil-num=3 ORCID= en-aut-name=TachibanaHideo en-aut-sei=Tachibana en-aut-mei=Hideo kn-aut-name=立花英夫 kn-aut-sei=立花 kn-aut-mei=英夫 aut-affil-num=4 ORCID= en-aut-name=SenoToshinobu en-aut-sei=Seno en-aut-mei=Toshinobu kn-aut-name=妹尾敏伸 kn-aut-sei=妹尾 kn-aut-mei=敏伸 aut-affil-num=5 ORCID= en-aut-name=HaradaHideo en-aut-sei=Harada en-aut-mei=Hideo kn-aut-name=原田英雄 kn-aut-sei=原田 kn-aut-mei=英雄 aut-affil-num=6 ORCID= en-aut-name=TsuboiKeiichi en-aut-sei=Tsuboi en-aut-mei=Keiichi kn-aut-name=壷井圭一 kn-aut-sei=壷井 kn-aut-mei=圭一 aut-affil-num=7 ORCID= en-aut-name=MiyakeHirofumi en-aut-sei=Miyake en-aut-mei=Hirofumi kn-aut-name=三宅啓文 kn-aut-sei=三宅 kn-aut-mei=啓文 aut-affil-num=8 ORCID= en-aut-name=KimuraIkuro en-aut-sei=Kimura en-aut-mei=Ikuro kn-aut-name=木村郁郎 kn-aut-sei=木村 kn-aut-mei=郁郎 aut-affil-num=9 ORCID= affil-num=1 en-affil= kn-affil=岡山大学医学部附属環境病態研究施設成人病学分野 affil-num=2 en-affil= kn-affil=岡山大学医学部附属環境病態研究施設成人病学分野 affil-num=3 en-affil= kn-affil=岡山大学医学部附属環境病態研究施設成人病学分野 affil-num=4 en-affil= kn-affil=岡山大学医学部附属環境病態研究施設成人病学分野 affil-num=5 en-affil= kn-affil=岡山大学医学部附属環境病態研究施設成人病学分野 affil-num=6 en-affil= kn-affil=岡山大学医学部附属環境病態研究施設成人病学分野 affil-num=7 en-affil= kn-affil=岡山大学医学部附属病院第二内科 affil-num=8 en-affil= kn-affil=岡山大学医学部附属病院第二内科 affil-num=9 en-affil= kn-affil=岡山大学医学部附属病院第二内科 en-keyword=小膵癌 (Small pancreatic cancer) kn-keyword=小膵癌 (Small pancreatic cancer) en-keyword=膵癌の早期発見 (Early diagnosis of pancreatic cancer) kn-keyword=膵癌の早期発見 (Early diagnosis of pancreatic cancer) en-keyword=急性膵炎 (Acute pancreatitis) kn-keyword=急性膵炎 (Acute pancreatitis) END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=51 end-page=58 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19970110 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Measuring instrument of carbon dioxide concentration in seawater en-subtitle= kn-subtitle= en-abstract= kn-abstract=The Measuring instrument of carbon dioxide concentration in seawater (pCO(2)) is developed. The instrument consists of an equilibrator, a non-dispersive infrared gas analyzer (NDIR), a carrier gas generator and a processing signal generator. The equilibrator has a cross section of 3 c㎡ and is 15 cm tall. The principle of pCO(2) measurement is based on the equilibration of a carrier gas phase with a seawater sample and subsequent determination of the carbon dioxide concentration in the carrier gas. The carrier gas circuit of the NDIR is opened to the atmosphere to maintain the carrier gas line at a barometric pressure. The present instrument can measure pCO(2) within the measuring error of about 2 ppm with sample water of about 180ml every 20 min. en-copyright= kn-copyright= en-aut-name=KishidaTakumi en-aut-sei=Kishida en-aut-mei=Takumi kn-aut-name=岸田巧 kn-aut-sei=岸田 kn-aut-mei=巧 aut-affil-num=1 ORCID= en-aut-name=WatanabeKeiichiro en-aut-sei=Watanabe en-aut-mei=Keiichiro kn-aut-name=渡辺桂一郎 kn-aut-sei=渡辺 kn-aut-mei=桂一郎 aut-affil-num=2 ORCID= en-aut-name=OhtakiEiji en-aut-sei=Ohtaki en-aut-mei=Eiji kn-aut-name=大滝英治 kn-aut-sei=大滝 kn-aut-mei=英治 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=11 end-page=24 dt-received= dt-revised= dt-accepted= dt-pub-year=1998 dt-pub=19980114 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A numerical analysis of slow oscillations in dynamics of coupled systems en-subtitle= kn-subtitle= en-abstract= kn-abstract=We study a system that models a problem in which an oscillatory unit is coupled to a passive medium. We analyze the case in which an RCL circuit is coupled to an RC circuit. Some numerical results indicate when slow oscillations occur in coupled systems. en-copyright= kn-copyright= en-aut-name=WatanabeMasaji en-aut-sei=Watanabe en-aut-mei=Masaji kn-aut-name=渡辺雅二 kn-aut-sei=渡辺 kn-aut-mei=雅二 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 en-keyword=coupled circuits kn-keyword=coupled circuits en-keyword=Van der Pol's equation kn-keyword=Van der Pol's equation en-keyword=slow oscillations kn-keyword=slow oscillations END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2004 dt-pub=20040930 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=伝送線路の不平衡度に注目したプリント回路基板からのコモンモード不要電磁波の予測法 kn-title=Evaluation of Common-Mode Electromagnetic Emission Based on the Imbalance Difference of Transmission Lines on Printed Circuit Boards en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=WatanabeTetsushi en-aut-sei=Watanabe en-aut-mei=Tetsushi kn-aut-name=渡哲史 kn-aut-sei=渡 kn-aut-mei=哲史 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2001 dt-pub=20010325 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=デｨジタル基板の電源グランドノイズを抑制するEMC設計手法 kn-title=EMC Design Method for Suppressing Power Ground Noise of Digital Printed Circuit Boards en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=福本幸弘 kn-aut-sei=福本 kn-aut-mei=幸弘 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19970325 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=デｨジタルプリント回路基板から放射される電磁妨害波スペクトルの予測 kn-title=Prediction of Electromagnetic Inter- ference Spectrum Emitted from a Digital Printed Circuit Board en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=宮下卓也 kn-aut-sei=宮下 kn-aut-mei=卓也 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END