検索結果 1341 件
| 著者 | 国富 康彦| |
|---|---|
| 発行日 | 1987-12-30 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 99巻 |
| 号 | 11-12号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 小坂 義樹| |
|---|---|
| 発行日 | 1987-12-30 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 99巻 |
| 号 | 11-12号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 曽我 浩之| |
|---|---|
| 発行日 | 1987-10-31 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 99巻 |
| 号 | 9-10号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 宮田 伊知郎| |
|---|---|
| 発行日 | 1988 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 100巻 |
| 号 | 7-8号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 滝沢 正| |
|---|---|
| 発行日 | 1988 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 100巻 |
| 号 | 1-2号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 藤川 信昌| |
|---|---|
| 発行日 | 1987-02-28 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 99巻 |
| 号 | 1-2号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 渡辺 正朝| |
|---|---|
| 発行日 | 1988 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 100巻 |
| 号 | 1-2号 |
| 資料タイプ | 学術雑誌論文 |
| JaLCDOI | 10.18926/15814 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_17_1_1.pdf |
| 著者 | Takahashi Teruo| Miyahara Toshiro| |
| 抄録 | This paper deals with the comparison of gas-liquid holdup and froth height on a perforated plate under various operational conditions such as liquid stagnant, cocurrent, countercurrent and crosscurrent gas-liquid flow system. Tendency to foam is remarkable in countercurrent and crosscurrent flow system. The crosscurrent flow system is suitable for the operation of mass transfer from the point of view of gas-liquid holdup. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1983-02-25 |
| 巻 | 17巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 13 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307710 |
| JaLCDOI | 10.18926/15789 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_19_1_53.pdf |
| 著者 | Korenaga Takashi| Moriwake Tosio| Takahashi Teruo| |
| 抄録 | Three methods for determining chemical oxygen demand (COD) by means of flow injection analysis (FIA) with potassium permanganate, potassium dichromate, or cerium(IV) sulfate as oxidant, developed in this laboratory, are described from the point of view of their operating properties. The permanganate method is the most sensitive and common, but forms manganese(IV) oxide precipitate which blocks the FIA lines and connectors. Addition of phosphoric acid in the reagent system is, however, effective to some extent in order to avoid blocking the flow system. The dichromate method is the most workable and stable, but produces toxic wastes containing chromium(VI). The cerium method is the most probable because cerium(IV) is the strongest oxidant of the three and less poisonous. The last method with cerium(IV) sulfate is therefore recommendable to apply to the continuous monitoring of COD in many situation. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1984-11-26 |
| 巻 | 19巻 |
| 号 | 1号 |
| 開始ページ | 53 |
| 終了ページ | 62 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307292 |
| JaLCDOI | 10.18926/15774 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_18_1_91.pdf |
| 著者 | Sano, Hiroya| 古賀 隆治| Kosaka, Megumi| Wake, Ichiro| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1984-03-30 |
| 巻 | 18巻 |
| 号 | 1号 |
| 開始ページ | 91 |
| 終了ページ | 100 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307204 |
| JaLCDOI | 10.18926/15765 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_15_1_111.pdf |
| 著者 | Korenaga Takashi| Ikatsu Hisayoshi| Moriwake Tosio| Takahashi Teruo| |
| 抄録 | On the flow injection analysis (FIA) of chemical oxygen demand (COD), silver salt was added as an oxidation catalyst for COD substances and a masking agent for halide to improve operating conditions of the FIA apparatus. Both of a proper concentration of potassium permanganate solution and 6.0 % sulfuric acid solution containing 0.1 % silver nitrate are individually pumped up with respective flow rates of 0.51 ml min(-l) and merged into a carrier stream. A 20 μ1 of sample solution is injected into the flow of sulfuric acid solution at just before the merging place. The sample mixed with the carrier solutions in a reaction manifol(polytetrafluoroethylene tubing: 0.5 mm i.d. x 30 m), is passed through a thermostated bath at 100 °c and led to a flow cell for the absorbance measurements at 525 nm. The absorbances are continuously recorded with time. The peaks in the recordings showed good reproducibility and the calibration obtained at a linear concentration range of 0 - 170 mg 1(-1) COD with glucose as standard. The detection limit and precision confirmed with this method were 5 mg 1(-1) and 0.8 %, respectively. Chloride ion up to 200 mg 1(-1) did not interfere without elimination of a silver chloride precipitate. By the present FIA method, several industrial waste water samples were analyzed at a sampling rate of about 40 samples per hour, and their apparent COD values were compared with those found by the manual JIS method. Both of the methods gave the similar results within an error range from -35 to +5 %. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1980-11-29 |
| 巻 | 15巻 |
| 号 | 1号 |
| 開始ページ | 111 |
| 終了ページ | 121 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307490 |
| JaLCDOI | 10.18926/15754 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_15_1_29.pdf |
| 著者 | Okamoto Takuji| |
| 抄録 | In this paper, a hardware design of digital systems with remote-diagnostic capability is presented. We consider a method for testing a system T(l) on a module basis with a remotely installed systems T(2). In the testing mode, we set up a system (T(l)-m,m') such that a module m of T(l) is replaced by an adapter A(1) connected to other adapter A(2) through a telephone line and the corresponding module m' of T(2) is connected to A(2). If the system (T(l)-m,m') can simulate T(1) in the absence of any faluts, then it can test m' under a self test program. The main subject of this paper is to study the conditions of the system to be testable in the above sense. At first, the remote diagnostic network based on the system in this paper, restrictions to the system configuration required to perform such a diagnosis and the operation of the diagnostic system are described. The second, the module structure to make above simulation possible is considered, representing the system configuration graphically. Finally, an example of the adapter is shown and the time consumed to diagnose is discussed. One of our results is that a sufficiently large class of synchronous digital systems with few minor conventions is testable. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1980-11-29 |
| 巻 | 15巻 |
| 号 | 1号 |
| 開始ページ | 29 |
| 終了ページ | 45 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307349 |
| JaLCDOI | 10.18926/15752 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_14_2_119.pdf |
| 著者 | Korenaga Takashi| Ikatsu Hisayoshi| Moriwake Toshio| Takahashi Teruo| |
| 抄録 | A new method based on the principle of flow injection analysis is presented for the semiautomated determination of chemical oxygen demand (COD) in environmental water samples. The method is rapid and continuous, and suitable for the monitoring of COD in wastewaters. The apparatus used was simply constructed by parts commercially available for high performance liquid chromatography. Teflon tubing heated with a boiling water was used as a reactor and simultaneously used for mixing coils and transmission lines. The operating conditions were examined to apply the determination of COD in wastewaters by using glucose as a standard COD substance. The procedures recommended are as follows: Both 4.9x10(-4) M potassium permanganate and 6.7 % sulfuric acid solutions are individually pumped, 20 μl of a sample solution is injected into the flow of the sulfuric acid solution, and then mixed with a mixing joint. The mixed solution is transported to a flow cell situated in a spectrophotometer fixed at a wavelength of 525 nm, and decrements of absorbance are recorded. The peaks were reproducibly obtained at a concentration range of 10 - 200 mg-COD 1(-1). Chloride up to 1000 mg 1(-1) was not interfered at all. Various wastewater samples were analyzed by the proposed method at a sampling rate of 30 samples per hour, and the apparent COD values obtained were compared with the manual COD ones obtained by JIS method. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1980-03-01 |
| 巻 | 14巻 |
| 号 | 2号 |
| 開始ページ | 119 |
| 終了ページ | 129 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307775 |
| JaLCDOI | 10.18926/15745 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_14_2_33.pdf |
| 著者 | Kaneda Masahiro| |
| 抄録 | Algorithms for system identification applying throughout Fast Fourier Transform (FFT) to the major calculating operations are introduced. It is shown that by using data of about as twice length as system settling time and by truncating the incorrect correlation functions resulting from them, errors owing to finiteness of data can be avoided. It is shown that so as to suppress the effects owing to statistical fluctuation of input data or output noise, superposition of data in frequency domain is effective, and also the damping terms of poles or zeros can be efficiently evaluated by utilizing the phase change of the spectra of the impulse response sequence. The proposed method can be efficiently applied to relatively higher order systems or relatively rapidly time-variant systems because of high accuracy and high speed processing of FFT. Moreover, it needs not to assume the order of the system a priori, and yields a reasonable lower order approximating system in itself. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1980-03-01 |
| 巻 | 14巻 |
| 号 | 2号 |
| 開始ページ | 33 |
| 終了ページ | 51 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307376 |
| JaLCDOI | 10.18926/15737 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_14_2_1.pdf |
| 著者 | Wada Masayuki| Ogawa Kazuo| Akagi Fumio| Osaki Hirokazu| Kikuchi Susumu| |
| 抄録 | The assumption that vocational aptitude changed with age and with the kind of occupation was examined from the tendency of the fitted curve for the score of the aptitude test. 9 vocational aptitudes were measured by the general vocational aptitude test by Japan Labor Ministry. Subjects were 382 male workers (design engineers, turners, welders, can manufacturing workers, and crane operators) of from 20 to 59 years old, and 348 male and female students (junior high school, vocational school, and university) of from 15 to 19 years old. The design engineers' aptitudes advanced along the quadratic curve until 31 years old, but almost all the aptitudes of the other workers fell along the linear curve with age. The design engineers preserved various aptitudes until 52 years old, the turners 44, and the welders, the can manufacturing workers, and the crane operators 37. The students' aptitudes were equal to those of the workers of from 15 to 25 years old. The workers preserved Spatial aptitude and Numerical aptitude until 45 years old. This could be said in all the occupations here. Further it was made clear from the micromotion study that the influence of age was caused by therbligs |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1980-03-01 |
| 巻 | 14巻 |
| 号 | 2号 |
| 開始ページ | 1 |
| 終了ページ | 12 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307217 |
| JaLCDOI | 10.18926/15700 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_13_45.pdf |
| 著者 | Fujitsuka Takeshi| Agusa Toru| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1979-03-05 |
| 巻 | 13巻 |
| 開始ページ | 45 |
| 終了ページ | 52 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307473 |
| JaLCDOI | 10.18926/15690 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_10_2_55.pdf |
| 著者 | Nakata Takayoshi| Ishihara Yoshiyuki| Matsubara Kazunori| Nakano Masanori| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1976-01-27 |
| 巻 | 10巻 |
| 号 | 2号 |
| 開始ページ | 55 |
| 終了ページ | 61 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307969 |
| JaLCDOI | 10.18926/15672 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_4_51.pdf |
| 著者 | Takahashi Teruo| Akagi Yasuharu| |
| 抄録 | In this report, the average holding time of gas in foaming layer and the number of transfer units based on gas-phase of the Rotational-current tray were considered experimentally. The average holding time was determined by water-air system. On the other hand, the number of transfer units was determined by water-ammonia-air system that gas-phase resistance controlled. The average holding time increases with gas and liquid velocities, and does not change with the tray dimensions clearly. From the experimental results of the number of transfer units, it was found that the tray can be operated at high efficiency up to larger gas and liquid flow rates than that of sieve trays. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1969-09-01 |
| 巻 | 4巻 |
| 号 | 1号 |
| 開始ページ | 51 |
| 終了ページ | 56 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307449 |
| JaLCDOI | 10.18926/15661 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_8_2_66.pdf |
| 著者 | Fukui, Kiyoshi| Nogi, Shigeji| |
| 抄録 | A magic T-coupled two oscillators system having arbitrary amount of phase adjusting errors is studied both theoretically and experimentally. Denoting two independent phase parameters of the system measured from their optimum values as Δφ and Δψ, it is derived analytically that the optimum operation is possible in principle in a definite region of Δφ - Δψ plane, so we have a considerable amount of margin for phase adjusting error. Experimental result also confirms the existence of some phase error margin, though the measured magnitude of margin is smaller to some extent than the theoretical prediction. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1973-12-26 |
| 巻 | 8巻 |
| 号 | 2号 |
| 開始ページ | 66 |
| 終了ページ | 74 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307916 |
| JaLCDOI | 10.18926/15635 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_4_35.pdf |
| 著者 | Kaneda Yasuhiro| Osaki Hirokazu| Kikuchi Susumu| |
| 抄録 | Insuring fast and precise human operation is one of the engineering requirements in the developing civilization. Some man-machine system, when any operator is exposed himself to some kind of vibration, he may not perform his operation in good conditions. Then one of the interferring factors, there is a fatigue caused by vibration. In this study, subjects sit on the chair which was set on the vibration table, and were shaken vertically for some given times, then were measured whether the fatigue occured or not by flicker friction tester. Flicker patterns were analyzed according to each vibration-condition, then the authors knew that the fatigue was occured by vibration. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1969-09-01 |
| 巻 | 4巻 |
| 号 | 1号 |
| 開始ページ | 35 |
| 終了ページ | 38 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308023 |