検索結果 989 件
| JaLCDOI | 10.18926/15614 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_101.pdf |
| 著者 | Hirai Taketsugu| Takahashi Katsuaki| |
| 抄録 | Potential sweep voltammetries of Na(2)O·SiO(2) and Na(2)O·2SiO(2) at 730-1200°C were performed with the stationary platinum wire electrode and with the sweep rates of 40 and 120mV/sec. Although current-potential relation of Na(2)O . SiO(2) at 1200°C gave stationary S-shape pattern, those of the rest were transient modes with hysteresis. From the voltammetric considerations, a reversible oxygen electrode process where diffuion of free oxygen anion or silicate anion may be a rate-determining stage was tentatively proposed. Approximate estimations of decomposition voltage supported that a sole reaction process such as the decomposition of Na(2)O or indirect decomposition of SiO(2) in the melt was most probable. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 101 |
| 終了ページ | 105 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307459 |
| JaLCDOI | 10.18926/15613 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_95.pdf |
| 著者 | Suefusa Kiyoshi| Monobe Kazuo| |
| 抄録 | Polyethylene was crytallized from the molten film under temperature gradient. As a result, the optically positive spherulites were observed, though only the negative spherulites had been observed previOusly in polyethylene. When the radial structure units twisted regulary in a spherulite are formed parallel to the surface of the film, the spberulite is usually optically negative in polyethylene. In this study, the temperature gradient normal to the surface of the film gives so significant tilt of the radial structure units formed to the surface of the film that the radial refractive index becomes larger than the tangential one under the transmitted polarized light and the spherulites have optically positive behavior. The optical behaviors of the polyethylene spherulites and the crystallizing condition were studied and discussed. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 95 |
| 終了ページ | 100 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307360 |
| JaLCDOI | 10.18926/15612 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_89.pdf |
| 著者 | Monobe Kazuo| Yamashita Yuhiko| Fujiwara Yasuo| Fujiwara Masahiko| |
| 抄録 | It was shown that the fibrous crystals of isotactic polybutene-l crystallized from solution under shearing stress are also composed of the central threads with an extended chain character and the epitaxally deposited lamellae with a folded chain character. The characteristic behaviors in this polymer exist in; (1) that the resulting crystals possess the hexagonal modification of form 1'; (2) that at low polymer concentrations the lamellar crystals with an orthorhombic modification of form Ⅲ are precipitated in similar fashion to the case in the absence of stirring; (3) that the morphology in surface replica of thick deposited film is very similar to that of melt extruded polyethylene film crystallized in a highly stressed state. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 89 |
| 終了ページ | 94 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307171 |
| JaLCDOI | 10.18926/15611 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_85.pdf |
| 著者 | Monobe Kazuo| Fujiwara Yasuo| Yamashita Yuhiko| Hironaka Kiyoshi| |
| 抄録 | Isotactic polypropylene was crystallized in the form of fibrous crystals from solution under shearing stress. The fibrous crystals consist of the oriented cluster of micro fibrils. From the electron microscopy and the electron diffraction study, it was found that the fine texture of this fibrous crystals is also the two component systems which are composed of the central threads with an extended chain character and the lamellae with a folded chain character deposited on the threads, as in polyethylene. Relatively larger lamellar structure than that of polyethylene was observed. The effect of crystallization conditions to the formation of the fibrous crystals from solution of isotactic polypropylene was described briefly. A characteristic melting behavior due to the melting of the central threads with an extended chain character was observed from the thermogram of differential scanning calorimeter. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 85 |
| 終了ページ | 88 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307605 |
| JaLCDOI | 10.18926/15610 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_73.pdf |
| 著者 | Torii Sigeru| Isikawa Tatsuo| Takeda Akira| |
| 抄録 | Amide derivatives of γ-substituted paraconic and aconic acids have been synthesized. Ultraviolet spectra of the aconic acid derivatives showed characteristic fine structure in the region of 245 to 280 mμ. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 73 |
| 終了ページ | 76 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307690 |
| JaLCDOI | 10.18926/15609 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_69.pdf |
| 著者 | Torii Sigeru| Funakosi Hitosi| Takeda Akira| |
| 抄録 | Monoamides of 5-substituted 4-methyl-3-carboxy-3(or 4)-alkenoic acids have been synthesized, starting with substituted itaconic anhydrides. The anhydride ring was opened by amines to afford N-aryl(or alkyl)-4-alkyl(or aryl)-3carboxy- 3(or 4}-alkenamides. The structure of the amide was elucidated by the comparison with the reference compound prepared from the corresponding Stobbe half-esters. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 69 |
| 終了ページ | 72 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307752 |
| JaLCDOI | 10.18926/15607 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_63.pdf |
| 著者 | Takahashi Katsuaki| Kambara Ginjiro| Okahara Masamichi| |
| 抄録 | Spectrophotometric investigations were carried out on soda-lime-silica glasses containing iron in high content, corresponding to 4.9 wt.% Fe(2)O(3), and melted under the various reducing conditions, as a part of series of studies on the redox behavior of glass. Absorption measurement was made in the range from 340 mμ to 1000 mμ. Ferric ions could not be reduced to ferrous ions completely even by the amount of carbon of four equivalents. The ratio of the strength of light absorption at 1000 mμ as a typical band of Fe(2+) ions and that at 380mμ of Fe(3+) ions was expressed as E(1000)/E(380), which was examined for glass compositions as well as various carbon amount added to glass batches. The ratio decreases as the carbon amount increases and increases with decreasing content of Na(2)O or CaO. These changes of spectrophotometric properties of glasses were discussed from the view point of state of the the iron ions. Besides, some results on oxidized glasses were also added. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 63 |
| 終了ページ | 68 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307848 |
| JaLCDOI | 10.18926/15606 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_57.pdf |
| 著者 | Takahashi Teruo| Shimizu Kengo| |
| 抄録 | In this report the formation of bubbles at a single circular hole is considered theoretically, as a fundamental study on contacting devices for the purpose of mass transfer operation in chemical engineering. From many previous experimental data, it is found that the mechanism of bubble formation is classified into steady bubble growth system and potential bubble formation system. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 57 |
| 終了ページ | 62 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307610 |
| JaLCDOI | 10.18926/15605 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_51.pdf |
| 著者 | Takahashi Teruo| Akagi Yasuharu| |
| 抄録 | The liquid phase mass transfer resistance in the Rotational-current tray is one of the most important factors in its design and performance. In this report, the holding time of liquid on the tray was studied experimentally by water-air system, and then the desorption tests were carried out by water-oxygen-air system that the liquid phase resistance were controlling. From the results of these experiments, it was found that the gas flow rate and the holding time of liquid on the tray control the tray efficiency strongly. Thus, the experimental equation for the number of transfer units based on liquid phase was derived. And also, it was found that this type of tray can be operated at high efficiency with a higher gas rate than the Kittel tray and the sieve tray without downcomer. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3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 | 120002307343 |
| JaLCDOI | 10.18926/15603 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_39.pdf |
| 著者 | Ohta Matsuo| Hashimoto Fumio| Tanimoto Tadashi| |
| 抄録 | Al-Zn, Al-Ag and Al-Cu base ternary alloys were studied by measurement of electrical resistivity. An approximate methods to estimate the binding energy between an atom of a third element and a vacancy was derived. The binding energy between a vacancy and an atom of Cu, Ag, Au, Be, Ca, Cd, In, Si, Ti, Ge, Zr, Sn, Pb or Mn was estimated to be <0.23, 0.25,> 0.35, 0.28, 0.27, 0.32, 0.39, 0.28, 0.30, 0.33, 0.33, 0.43, >0.38 or <0.23 (±0.05) eV, respectively. The results may be summarized as follows: (I) The ratio of the time required to reach the maximum electrical resistivity in isothermal aging curves of the Al-Zn-X or Al-Ag-X ternary alloy to that in the Al-Zn or Al-Ag binary alloy may be inversely proportional to the ratio of the concentration of vacancies bound to Zn or Ag atoms immediately after quenching in the ternary alloy to that in the binary alloy. And also the ratio of initial rate of clustering for AI-Cu-X ternary alloy to that in the binary alloy may be inversely proportional to the ratio of the concentration of vacancies bound to Cu atoms immediately after quenching in the ternary alloy to that in the binary alloy. It is possible to deduce the binding energy between an atom of X element and a vacancy using this relations. (2) The effect of the valence of the solute element on the binding energy between an atom of a third element and a vacancy was remarkable. (3) The effect of the radius of an atom of the solute element on the binding energy is also observed, but this effect is smaller than that of the valence. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 39 |
| 終了ページ | 50 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307944 |
| JaLCDOI | 10.18926/15602 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_31.pdf |
| 著者 | Wada Tsutomu| Shimizu Akira| |
| 抄録 | This study is concerned with a developed method for obtaining the quantitative relations between the input or output characteristics and the geometric parameters of the wall reattachment fiuidic devices. In this report, it is shown analytically and experimentally that the characteristics can be represented by the functions, dependent on the geometric parameters only, with non dimensional quantities, if the Reynolds number at the main jet nozzle is sufficiently large. Accordingly, the quantitative relations of the geometric parameters may be analyzed more easily. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 31 |
| 終了ページ | 37 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307757 |
| JaLCDOI | 10.18926/15600 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_23.pdf |
| 著者 | Sayama Hayatoshi| Oi Ko| |
| 抄録 | This paper deals with the optimization problem of extraction processes with recycle and immiscible solvent. Gradient methods using control variable iteration require a trial and error procedure to solve process and overall equations for this problem. A new formulation is presented to eliminate such a trial and error procedure. First order and second-order convergence gradient methods were applied to determine the optimum solvent distribution in cross-current extraction with recycle and immiscible solvent. The Fletcher-Powell method converged most rapidly in all cases. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 23 |
| 終了ページ | 29 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307880 |
| JaLCDOI | 10.18926/15599 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_17.pdf |
| 著者 | Osaki Hirokazu| Kikuchi Susnmu| |
| 抄録 | The measurement of the flicker value is a method to estimate the degree of the fatigue. This method is investigated by several authors. (1),(2) The control chart of the flicker value was used for one method of the labor management and found that this chart showed the learning trend. In this paper, the simulator of automobile was used to examine the relation between the variation of the flicker value and the driving environment, the learning process of the reaction and the relation between the flicker pattern and the learning process in the working hours. These were contributed to find the beginning of the stationary condition and which group was adapted to this work. Data was analyzed by statistical methods. It was found in this study that the variation of the flicker value and the learning process of the reaction were connected with each other. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 17 |
| 終了ページ | 22 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307774 |
| JaLCDOI | 10.18926/15598 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_13.pdf |
| 著者 | Hirose Koji| Asano Yoshihiro| |
| 抄録 | The friction coefficient of sectionally rough pipes has not been studied yet. The friction coefficient for turbulent flow through sectionally roughened square ducts is experimentally studied. Four arrangements of rough surfaces are used to obtain the sectionally roughened square ducts. It is attempted to predict the friction coefficient for sectionally roughened square ducts from the friction coefficients for alloverly roughened and smooth square ducts. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 13 |
| 終了ページ | 16 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307548 |
| JaLCDOI | 10.18926/15596 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_1.pdf |
| 著者 | Honda Kazuo| Konaga Tetsuro| |
| 抄録 | Broadly speaking, there are three kinds of approaches to investigate the deformation and fracture of materials, that is, the microscopic (metallurgical), macroscopic(mechanical) and theoretical (mathematical) researches. It is necessary, however, to bridge the gap which persists among of them. Many investigations on the form of plastically deformed zone at a crack tip, the distribution of plastic strain in plastic zone and fracture criterion have been made for the purpose to clarify the mechanism on initiation and propagation of cracks. In this paper, the authors report the studies, from the standpoint of microscopic views, on the crystal deformation at the tip of crac's in notched specimen during fatigue process. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1968-09-01 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 11 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307236 |
| JaLCDOI | 10.18926/15593 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_2_133.pdf |
| 著者 | Misaki Takayoshi| Okamoto Takuji| |
| 抄録 | This paper describes a method of hybrid computation for the problems including the function x(n). And the greater part of it is devoted to the considerations of the linkages between the analog and the digital for the function x(n). Here the function x(n) appears frequently in the form of x(2) or x(4) in the industrial problems. As is well known the function x(2) is the characteristic included in fluid-flow problems, and x(4) is in heat-radiation problems. The weak points of analog computation for these characteristics are in accuracy and stability, but can be compensated by making use of digital computer for these parts. In the industrial uses the exclusive digital computer is more convenient than the general-purpose one. Here the relative error of analog computation, the linkages, the number of the digital elements and their relationships are considered at the same time and as the results the reasonable method of hybrid computation is obtained. That is, the exclusive digital multiplier with a compressor and an expandor is found reasonable. Its design considerations are described in details, but it is the basic idea among others that the characteristics of the compressor and the expandor are determined so that the relative error of the signal appearing at the output of the latter may be constant and as the results the necessary and sufficient number of the digital elements may be decreased. And in practice these characteristics are also realized approximately by a group of the straight lines through the origin. Finally the reduced rate of the digital elements and the optimum condition of the approximation are illustrated together with an example. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1967-04-01 |
| 巻 | 2巻 |
| 号 | 1号 |
| 開始ページ | 133 |
| 終了ページ | 137 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307842 |
| JaLCDOI | 10.18926/15592 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_2_127.pdf |
| 著者 | Misaki Takayoshi| Kato Osamu| Yamamoto Hideki| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1967-04-01 |
| 巻 | 2巻 |
| 号 | 1号 |
| 開始ページ | 127 |
| 終了ページ | 132 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307133 |
| JaLCDOI | 10.18926/15591 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_2_120.pdf |
| 著者 | Himei Toyoji| Inoue Jyunichi| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1967-04-01 |
| 巻 | 2巻 |
| 号 | 1号 |
| 開始ページ | 120 |
| 終了ページ | 126 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307335 |
| JaLCDOI | 10.18926/15590 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_2_111.pdf |
| 著者 | Nakata Takayoshi| Ishihara Yoshiyuki| |
| 抄録 | In this paper, the easy design-method of trasformer tank is described. Using nomographs induced here, the bending moments on the oval tank or round cornered rectangular tank which is used for usual transformer, are briefly calculated. And the relation between the type of transformer and the distribution of bending moment is cleared. Using these results, even electric engineer who has poor knowledge for strength of materials, can easily design a most suitable tank. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1967-04-01 |
| 巻 | 2巻 |
| 号 | 1号 |
| 開始ページ | 111 |
| 終了ページ | 119 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307797 |
| JaLCDOI | 10.18926/15588 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_2_96.pdf |
| 著者 | Mine Tadao| Yamamoto Tatuma| Baba Yukinobu| Yamamoto Yositake| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1967-04-01 |
| 巻 | 2巻 |
| 号 | 1号 |
| 開始ページ | 96 |
| 終了ページ | 110 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307313 |