result 1390 件
JaLCDOI | 10.18926/14084 |
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FullText URL | Mem_Fac_Eng_OU_41_1_52.pdf |
Author | Inaba, Hideo| Syahrul Husain| Horibe, Akihiko| Haruki, Naoto| |
Abstract | The effects of heat and mass transfer parameters on the efficiency of fluidized bed drying have been studied to optimize the input and output conditions. The analysis was carried out using two different materials, wheat and corn. Energy and exergy models based on the first and second law of thermodynamic are developed. Furthermore, some unified non-dimensional experimental correlations for predicting the efficiency of fluidized bed drying process have been proposed. The effects of hydrodynamics and thermodynamics conditions such as the inlet air temperature, the initial moisture content and well known Fourier and Reynolds numbers on energy efficiency and exergy efficiency were analyzed using the developed model. A good agreement was achieved between the model predictions, non-dimensional correlations and the available experimental results. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2007-01 |
Volume | volume41 |
Issue | issue1 |
Start Page | 52 |
End Page | 62 |
ISSN | 0475-0071 |
language | English |
File Version | publisher |
NAID | 120002308668 |
JaLCDOI | 10.18926/14080 |
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FullText URL | Mem_Fac_Eng_OU_41_1_11.pdf |
Author | Nogami, Yasuyuki| Morikawa, Yoshitaka| |
Abstract | This paper proposes an algorithm for generating irreducible cubic trinomials in the form x(3) + ax + b, b ∈ F(p), where a is a certain fixed non-zero element in the prime field F(p). The proposed algorithm needs a certain irreducible cubic trinomial over F(p) to be previously given as a generator; however, the proposed algorithm can generate irreducible cubic polynomials one after another by changing a certain parameter in F(p). In this paper, we compare the calculation cost and the average computation time for generating an irreducible cubic polynomial, especially trinomial, among Hiramoto et al. irreducibility testing algorithm, Berlekamp-Massey minimal polynomial determining algorithm, and the proposed algorithm. From the experimental results, it is shown that the proposed algorithm is the fastest among the three algorithms for generating irreducible cubic trinomials. |
Keywords | irreducible cubic polynomial minimal polynomial |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2007-01 |
Volume | volume41 |
Issue | issue1 |
Start Page | 11 |
End Page | 19 |
ISSN | 0475-0071 |
language | English |
File Version | publisher |
NAID | 120002308381 |
JaLCDOI | 10.18926/14079 |
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FullText URL | Mem_Fac_Eng_OU_41_1_1.pdf |
Author | Nogami, Yasuyuki| Morikawa, Yoshitaka| |
Abstract | In this paper, we first show the number of x's such that x(2) +u, u ∈ F(*)(p) , becomes a quadratic residue in F(p), and then this number is proven to be equal to (p+1)/2 if −u is a quadratic residue in Fp, which is a necessary fact for the following. With respect to the irreducible cubic polynomials over Fp in the form of x(3)+ax+b, we give a classification based on the trace of an element in F(p3) and based on whether or not the coefficient of x, i.e. the parameter a, is a quadratic residue in Fp. According to this classification, we can know the minimal set of the irreducible cubic polynomials, from which all the irreducible cubic polynomials can be generated by using the following two variable transformations: x=x + i, x=j−1x, i, j ∈ Fp, j ≠ 0. Based on the classification and that necessary fact, we show the number of the irreducible cubic polynomials in the form of x(3)+ax+b, b ∈ F(p), where a is a certain fixed element in F(p). |
Keywords | Irreducible cubic polynomial trace quadratic residue |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2007-01 |
Volume | volume41 |
Issue | issue1 |
Start Page | 1 |
End Page | 10 |
ISSN | 0475-0071 |
language | English |
File Version | publisher |
NAID | 120002308562 |
JaLCDOI | 10.18926/14071 |
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FullText URL | Mem_Fac_Eng_OU_42_110.pdf |
Author | Nogami, Yasuyuki| Morikawa, Yoshitaka| |
Abstract | This paper shows a method for checking the parity of (#Jc − 1)/2 without calculating the order #Jc, where #Jc is the order of genus 2 or 3 hyperelliptic curve. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2008-01 |
Volume | volume42 |
Issue | issue1 |
Start Page | 110 |
End Page | 114 |
ISSN | 0475-0071 |
language | English |
File Version | publisher |
NAID | 120002308489 |
JaLCDOI | 10.18926/14061 |
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FullText URL | Mem_Fac_Eng_OU_42_56.pdf |
Author | Miyake Takashi| Totsuji, Chieko| Nakanishi Kenta| Tsuruta, Kenji| Totsuji, Hiroo| |
Abstract | We analyze the ground state of the two-dimensional quantum system of electrons confined in a parabolic potential with the system size around 100. We map the system onto a classical system on the basis of the classical-map hypernetted-chain (CHNC) method which has been proven to work in the integral-equation-based analyses of uniform unbounded systems and then apply classical numerical simulations. We find that the confined system undergoes the transition to the spin polarized state with the decrease of the average density and the corresponding critical value is as low as rs ∼ 0.3 in terms of the usual rs parameter estimated for the average density. As the ground state for given value of the rs parameter, our data give the critical value for the transition around 20 which is consistent with the known possibility. The advantage of our method is a direct applicability to geometrically complex systems which are difficult to analyze by integral equations. The application to the structure like quantum dots reported here is the first example of such applications. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2008-01 |
Volume | volume42 |
Issue | issue1 |
Start Page | 56 |
End Page | 59 |
ISSN | 0475-0071 |
language | English |
File Version | publisher |
NAID | 120002308633 |
JaLCDOI | 10.18926/14059 |
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FullText URL | Mem_Fac_Eng_OU_42_48.pdf |
Author | Totsuji, Chieko| Miyake Takashi| Nakanishi Kenta| Tsuruta, Kenji| Totsuji, Hiroo| |
Abstract | Based on the mapping introduced by the classical-map hypernetted-chain (CHNC) method, classical numerical simulations, Monte Carlo and molecular dynamics, have been applied to the twodimensional electron fluid and the results are compared with those of quantum Monte Carlo simulations hitherto reported. It is shown that polarization properties of the ground state obtained by the diffusion Monte Carlo method are reproduced within the accuracy of quantum simulations by both of two mapping functions for the quantum temperature which have been proposed within the CHNC method. These results may serve as the basis of numerical simulations based on the CHNC method which are applicable to finite non-periodic systems like quantum dots and systems at finite temperatures. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2008-01 |
Volume | volume42 |
Issue | issue1 |
Start Page | 48 |
End Page | 52 |
ISSN | 0475-0071 |
language | English |
File Version | publisher |
NAID | 120002308425 |
JaLCDOI | 10.18926/14058 |
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FullText URL | Mem_Fac_Eng_OU_42_44.pdf |
Author | Ogawa Takafumi| Tsuruta, Kenji| Totsuji, Chieko| Totsuji, Hiroo| Hiroshi Iyetomi| |
Abstract | To analyze vibrational properties of Si crystal with a single charge-neutral vacancy, we perform large-scale simulations based on tight-binding molecular-dynamics method. Vibrational modes and frequencies are obtained by diagonalizing dynamical matrix within a harmonic approximation. Results indicate that there exist vibrational modes spatially localized around the vacancy and large frequency shifts associated with the localized modes contribute significantly to reduction of the vibrational free energy. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2008-01 |
Volume | volume42 |
Issue | issue1 |
Start Page | 44 |
End Page | 47 |
ISSN | 0475-0071 |
language | English |
File Version | publisher |
NAID | 120002308412 |
JaLCDOI | 10.18926/14057 |
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FullText URL | Mem_Fac_Eng_OU_42_36.pdf |
Author | Kato, Hidehiro| Nekado, Kenta| Nogami, Yasuyuki| Morikawa, Yoshitaka| |
Abstract | This paper proposes an exponentiation method with Frobenius mappings. Our method is closely related to so-called interleaving exponentiation. Different from the interleaving exponentiation methods, our method can carry out several exponentiations using same base at the same time. The efficiency to use Frobenius mappings for an exponentiation in extension field is well introduced by Avanzi and Mihailescu. This exponentiation method is based on so-called simultaneous exponentiation and uses many Frobenius mappings. Their method more decreased the number of multiplications; however, the number of Frobenius mappings inversely increased. Compared to their method , the number of multiplications needed for the proposed method becomes about 20% larger; however, that of Frobenius mappings becomes small enough. |
Keywords | exponentiation Frobenius mapping extension field |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2008-01 |
Volume | volume42 |
Issue | issue1 |
Start Page | 36 |
End Page | 43 |
ISSN | 0475-0071 |
language | English |
File Version | publisher |
NAID | 120002308105 |
Author | Suekane, Takashi| Oshima, Mitsuko| Motomizu, Shoji| |
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Published Date | 2004-12-22 |
Publication Title | 分析化学 |
Volume | volume54 |
Issue | issue10 |
Content Type | Journal Article |
JaLCDOI | 10.18926/ESR/13959 |
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Title Alternative | LISTHKL : List h, k, l, Fo and σFo tables |
FullText URL | ESR_1_49.pdf |
Author | Yamakawa, Junji| Kawahara, Akira| |
Abstract | LISTHKL, a Fortran 77 program listing up the data for deposit is submission to Acta Crystallo-graphica has been written. The program requires a computer set with a printer utilizung the LIPS3 page description language. |
Keywords | LISTHKL Acta Crystallographica reflection data |
Publication Title | Okayama University Earth Science Report |
Published Date | 1994-09-20 |
Volume | volume1 |
Issue | issue1 |
Start Page | 49 |
End Page | 52 |
ISSN | 1340-7414 |
language | Japanese |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310510 |
JaLCDOI | 10.18926/ESR/13958 |
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Title Alternative | CALCOMP to LIPS3 convert library |
FullText URL | ESR_1_37.pdf |
Author | Yamakawa, Junji| |
Abstract | CALLIP, a CALCOMP compatible Fortran 77 library using the Canon LIPS3 page description lan-guage, has been written. As a result, the graphic output of programs with CALCOMP plotting routines used for crystal structure analyses, such as ORTEP2, Rietveld analyses and others can be used under the printer equipped with LIPS3 PDL. The details of the library was given with some graphic examples. |
Keywords | CALLIP CALCOMP LIPS3 Fortran 77 |
Publication Title | Okayama University Earth Science Report |
Published Date | 1994-09-20 |
Volume | volume1 |
Issue | issue1 |
Start Page | 37 |
End Page | 48 |
ISSN | 1340-7414 |
language | Japanese |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310211 |
JaLCDOI | 10.18926/ESR/13953 |
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FullText URL | ESR_1_9.pdf |
Author | Suzuki, shigeyuki| |
Abstract | The Iberian Pyrite Belt is an Upper Paleozoic succession which has been divided into the Phyllite-Quartzite Group, the Volcanic-Sliceous Complex and the Culm Group in ascending order from base to the top. The contacts among them are conformable. These Groups are tightly folded and metamorphosed un-der low-grade conditions during Hercynian times. The first stage folds of the Volcanic-Siliceous Complex and the Culm Group are associate with slaty cleavages (S1), while the Phyllite-Quartzite Group is asso-ciate with schistosities (S1). Fold analysis using cleavages and minoe folds has been utilized in the analysis of the stratigraphy. This led to systematic horizontal collection of specimens (pelitic rocks). S1 texture is defined by paralled alignment of secondary platy minerals which tend to grow larger and together, forming zonal domains toward the Phyllite-Quartzite Group. The clay matrices change to recrystallized quartz toward the Phyllite Quartzite Group. Textural modifications are evidenced by gradational changes from slaty cleavages to schistosities. This shows that recrystallization is the important deformation mecha-nism responsible for S1 development. It also reflects that the deformation was contemporaneous with metamorphism. |
Keywords | Slaty cleavage Schistosity Recrystallization |
Publication Title | Okayama University Earth Science Report |
Published Date | 1994-09-20 |
Volume | volume1 |
Issue | issue1 |
Start Page | 9 |
End Page | 18 |
ISSN | 1340-7414 |
language | English |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310428 |
JaLCDOI | 10.18926/ESR/13950 |
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Title Alternative | System for monitoring the vacuum of X-ray generators (Available use of 8 bit personal computer) |
FullText URL | ESR_2_103.pdf |
Author | Yamakawa, Junji| Kawahara, Akira| |
Abstract | An used 8 bit personal computer is utilized for an instrument for continuous monitoring of the vacuum valuses of X-ray genrators. The interface board, programmable peripheral interfacial LSI, 8255A and some IC's for address decoding are assembled into a completed unti. The concept of the construction of this interface unti is profitable for the inexpensive layout of experimental laboratories. |
Keywords | X-ray generator vacuum monitoring personal computer |
Publication Title | Okayama University Earth Science Report |
Published Date | 1995-09-20 |
Volume | volume2 |
Issue | issue1 |
Start Page | 103 |
End Page | 108 |
ISSN | 1340-7414 |
language | Japanese |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310492 |
JaLCDOI | 10.18926/ESR/13949 |
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Title Alternative | Rb-Sr age of K-rich LL-chondrite Yamato-74442 |
FullText URL | ESR_2_91.pdf |
Author | Nishiya, Nanayo| Okano, Osamu| Kagami, Hiroo| Nakamura, Noboru| |
Abstract | Yamato-74442, a brecciated LL-group chondrite, consists of fragments with igeous texture, chondrules, mineral fragments, and host. The fragments involve K-rich fragments as well as normal ones. Typically, both fragments consist mainly of euhedral porphyritic olivines and a few orthopyroxenes in a glassy grundmass. EPMA analyses for these fragments indicate that olivines and orthoptroxenes have a range of Fe/(Fe+Mg) ratio of 27.19~31.33 and 20.10~26.91 mol%, respectively. There is no significant difference in these rations between K-rich (Na2O/K2O<1) and normal framents. The K2O contents of groundmass for K-rich fragments range from 0.51 to 4.89 wt% and that of the normal fragments is 0.38~090 wt%. K2O contents of groundmass vary from fragment to fragment but are rather homegeneous in a single fragment. Rb-Sr isotopic determination on eighteen K-rich fragments (1.5 to 9.5mg in weight) gave an internal isochron age of 4.514±0.022 (2σ) Ga (λ87Rb=1.42×10-11y-1) and initial 87Sr/86Sr ratio of 0.7016±0.0024. This age is somewhat old compared with a whole rock isochron age of LL chondrites (4.493±0.18 Ga; Minster and Allegre, 1981). From a comoarison of the present result with others so far reported, it is inferred that the alkali differentiation as observed in Yamato-74442 probably occurred prior to or during a process of accumulation from LL chondrite parent material in the early solar nebula. |
Keywords | LL-chondrite Rb-Sr age Sr isotope K-rich fragment |
Publication Title | Okayama University Earth Science Report |
Published Date | 1995-09-20 |
Volume | volume2 |
Issue | issue1 |
Start Page | 91 |
End Page | 102 |
ISSN | 1340-7414 |
language | Japanese |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310270 |
JaLCDOI | 10.18926/ESR/13943 |
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Title Alternative | Water-soluble materials on volcanic ash from the 1990-94 eruption of the Unzenn volcano |
FullText URL | ESR_2_55.pdf |
Author | Akagi, Seishi| Yamamoto, Masahiro| |
Abstract | Water-soluble materials on volcanic ash from the Unzen volcano collected from February, 1991 to July, 1994 were chemically analyzed. They were similar in chemical characteristics to those obtained from other volcanoes. Chemical compositions varied even for materials from the same pyroclastic flow. C1 contens increased with increasing residence time of volcanic ash in air, but SO4 contents were almost fixed. It therefore seems that the reaction of volcanic ash with HC1 proceeds even at low temperatures, whereas the reaction with SO2 takes place only at high temperatutes. |
Keywords | volcanic ash volcanic gas Unzen volcano C1/SO4 ratio water-soluble material |
Publication Title | Okayama University Earth Science Report |
Published Date | 1995-09-20 |
Volume | volume2 |
Issue | issue1 |
Start Page | 55 |
End Page | 62 |
ISSN | 1340-7414 |
language | Japanese |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310484 |
JaLCDOI | 10.18926/ESR/13940 |
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Title Alternative | Application of the remotely operated TV vehicle to make geological maps of the Seto Inland Sea |
FullText URL | ESR_2_13.pdf |
Author | Suzuki, Shigeyuki| Inada, Takashi| |
Abstract | Submarine geological survey using the remotely operated TV vehicle (RV100), was carried out in 4 offshores of the Seto Inland Sea in Kagawa Prefecture. The study areas are west of Kosei Island of Sakaide City, south of Okado-bana of Nankai Town, west of Misaki of Takuma Town and north of Nou-Misaki of Sakaide City. TV vehicle transmite clear pictures of bottom of the sea to the monitor on board. The submarine geology of the study areas are composed of Cretaceous granitic basements and Quaternary sedimentary covers. By using these pictures Recent and Pleistocene deposits could be distinguished and lithology of sediments could also be identified. Lithology of sediments was however difficult to identify using the usual sonic prospecting method. Furthermore, pictures suggesting that ripples are just forming have been obtained. The TV vehicle is convenient in submarine survry, because it can travel much longeer and deeper than human diver. A new method of mapping submarine geology using TV vehicle was developed. |
Keywords | Submarine geology the Seto Inland Sea remotely operated TV vehicle |
Publication Title | Okayama University Earth Science Report |
Published Date | 1995-09-20 |
Volume | volume2 |
Issue | issue1 |
Start Page | 13 |
End Page | 22 |
ISSN | 1340-7414 |
language | Japanese |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310382 |
JaLCDOI | 10.18926/ESR/13937 |
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Title Alternative | A microcomputer-controlled gradual cooling system for hydrothermal reactors |
FullText URL | ESR_3_65.pdf |
Author | Yamakawa, Junji| Kawahara, Akira| |
Abstract | A used 8 bit microcomputer is applied for an instrument of controlling the heating temperatures of hydrothermal reactor furnaces. The temperatures were changed into appropriate values of voltage by thermocouples and additional devices. The interface board, programmable peripheral interface LSI and some IC's for addres decording are assembled into a complte unti. The device is useful for the inexpensive way of the construction of the accurate temperature control system. |
Keywords | hydrothermal synthesis cooling system personal computer |
Publication Title | Okayama University Earth Science Report |
Published Date | 1996-09-20 |
Volume | volume3 |
Issue | issue1 |
Start Page | 65 |
End Page | 70 |
ISSN | 1340-7414 |
language | Japanese |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310682 |
JaLCDOI | 10.18926/ESR/13928 |
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FullText URL | ESR_3_17.pdf |
Author | Suzuki, Shigeyuki| |
Abstract | In eastern Chugoku area, Paleogene deposits have not been recognized until fission-track dating of so called "Mountain Gravels" was carried out (Suzuki et al. 1995). Two sedimentation events in Paleogene time (27Ma and 34-35Ma) are inferred by the F-T dating Major lithology of the Paleogene deposits in the study area is graved which is mainly composed of subrounded to rounded cobbles. The "Mountain Gravels" were previously thought to be lower Quaternary deposits. The "Mountain Gravels" is associsted with coal bearing mud, sand, gravel and breccia deposits. The breccia deposits is distributed sporadically between the "Mountain Gravels" and basement rocks. The deposits are mainly composed of poorly sorted breccia and associated granitic sands. It is inferred that the breccia deposits are talus deposits. |
Keywords | Paleogene breccia talus deposits fission-track dating |
Publication Title | Okayama University Earth Science Report |
Published Date | 1996-09-20 |
Volume | volume3 |
Issue | issue1 |
Start Page | 17 |
End Page | 24 |
ISSN | 1340-7414 |
language | English |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310338 |
JaLCDOI | 10.18926/ESR/13927 |
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FullText URL | ESR_3_1.pdf |
Author | Daniel K. Asiedu| Suzuki, Shigeyuki| Shibata, Tsugio| |
Abstract | Petrographic and geochemical study of sandstones from the Kenseki Formation have shown that the sandstones are compositionally immature. The immaturity is reflected geochemically by their low SiO2 contents (52-66 wt%) and petrographically by low modal percents of quartz and K-feldspar, and high modal percents of plagioclase and volcanic lithic fragmants. The Kensaki sandstones are, however, poor in Na2O (up to 2.1 wt%). Both petrography and geochemistry suggest a heterogeneous source lithologies of acidic and basic volcanics, sedimentary, and ultramafic rocks. Petrographic evidence is supplied by quartz and plagioclase of volcanic origin, acidic volcanic fragments, basic volcanic fragments, volcanic glass, serpentinite fragments and detrital spinel grains. Geochemical evidence is provided by high FeO* (total iron as FeO), MgO, TiO2, CaO and K2O contents. Petrographic and geochemical study of the Kenseki sandstones indicate calc-alkaline oceanic island are provenance. The sediments were locally derived, with Alpine-type ultramafic rocks exposed in the north and volcanic materials of the Akiyoshi Belt supplying the bulk of the detritus. |
Keywords | Kenseki Formation modal analyses provenance |
Publication Title | Okayama University Earth Science Report |
Published Date | 1996-09-20 |
Volume | volume3 |
Issue | issue1 |
Start Page | 1 |
End Page | 16 |
ISSN | 1340-7414 |
language | English |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310277 |
JaLCDOI | 10.18926/ESR/13916 |
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Title Alternative | Landslide occurrence and geology of the Triassic Nariwa Group, Southwest Japan |
FullText URL | ESR_4_21.pdf |
Author | Hotani, Shu| Suzuki, Shigeyuki| Tanaka, Hajime| Yamada, Takuya| |
Abstract | Geological and topographical study of landslides in the Triassic Nariwa Group has been carried out. Nariwa Group is mostly composed of non-marine deposites and is characterized by cycle of fining upward successions. Landslides abundantly occur in the non-marine successions. Slip surface occure in coaly mudstones that have conspicuously less strength than sandstones. Creeps immediately below slip surfaces contribute to the occurrence of landslides in the Nariwa Group. |
Keywords | Iandslide Nariwa Group coaly mudstone |
Publication Title | Okayama University Earth Science Report |
Published Date | 1997-09-20 |
Volume | volume4 |
Issue | issue1 |
Start Page | 21 |
End Page | 32 |
ISSN | 1340-7414 |
language | Japanese |
Copyright Holders | 岡山大学地球科学研究報告編集委員会 |
File Version | publisher |
NAID | 120002310343 |