検索結果 2449 件
| JaLCDOI | 10.18926/15624 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_157.pdf |
| 著者 | Misaki Takayoshi| Okamoto Takuji| Kato Osamu| |
| 抄録 | 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. |
| 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 | 157 |
| 終了ページ | 162 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307953 |
| JaLCDOI | 10.18926/15616 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_3_113.pdf |
| 著者 | Takeda Akira| Wada Satosi| |
| 抄録 | A series of α-monoalkylamino-α-arylacetamides and α-dialkylamino-α-arylacetamides have teen synthesized via the corresponding nitriles. Some of these compounds have been found to exhibit moderate activity as herbicides. |
| 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 | 113 |
| 終了ページ | 117 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307743 |
| 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 | 10.18926/15579 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_2_62.pdf |
| 著者 | Hirai Taketsugu| Miura Yoshinari| Yoshio Tetsuo| Takahashi Katsuaki| |
| 抄録 | Decomposition voltages of Na(2)O (30-50 mole % )-SiO(2) binary system were estimated at the temperature range of 700~1200℃ by commutator technique. As the experimental procedure, relations between electrolytic current and resulting polarization potential without ohmic loss were observed by 20 cps mechanical commutator, using Pt|Na(2)O-SiO(2)|Pt electrochemical system. Experimental decomposition voltages determined from above relationship were the value of 1.5~2.0 V at the temperature beyond about 800℃ with comparatively less reproducibility. Further investigations on the decomposition reaction mechanisms were made in reference to both a series of reversible decomposition voltages derived from thermodynamic calculations on the several proposed decomposition reactions and chemical equilibrium in vitreous silicates. |
| 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 | 62 |
| 終了ページ | 67 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307847 |
| JaLCDOI | 10.18926/15568 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_2_23.pdf |
| 著者 | Yoshii Tensho| Kikuchi Susumu| |
| 抄録 | The problem of the optimal assignment of facilities to locaticns has been solved by J.W. Gavett and Normann V.Plyter. In their paper the branch and bound technique is used and for this purpose the distance matrix is transformed into the matrix whose diagonal compoents are zero. The purpose of this paper is to avoid such a transformation and the store of the distance matrix into the computer. |
| 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 | 23 |
| 終了ページ | 25 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307907 |
| JaLCDOI | 10.18926/15557 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_1_120.pdf |
| 著者 | Wada Tsutomu| Sawaragi Yosikazu| Yonezawa Yoo| |
| 抄録 | We attempt to apply the feedback compensation technics of on-off controller to the pneumatic systems. In this paper, we describe the structure and the action of a new developed pneumatic on-off controller with feedback compensation, and the principle of the special pilot valve which is used in the controller as the on-off element. Next, it is shown analytically and experimentally that the dynamic characteristics of the controller are nearly equal to those of the continuous one which has an infinite proportional gain instead of the on-off element, if the time average of its discontinuous output is treated as the output of the controller. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1966-03-31 |
| 巻 | 1巻 |
| 号 | 1号 |
| 開始ページ | 120 |
| 終了ページ | 129 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307543 |
| JaLCDOI | 10.18926/15555 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_1_110.pdf |
| 著者 | Takamatsu Takeiciro| Sayama Hayatoshi| Tonoike Takao| |
| 抄録 | The batch chemical reaction is chosen as the process model to be optimized and the rate constants are functions of pressure only, as the reactions are assumed to occur isothermally. The time optimal control problem considered here means to determine the minimum time path from the given initial compositions to desired final compositions by manipulating the process pressure. A gradient method or a steepest-ascent method is applied to determine the control variable program by using the high speed digital computer. Numerical solutions are presented for the following three cases: (1) no constraint on the operating pressure ...... open and matched terminal constraint. (2) constraint on the operating pressure ...... open terminal constraint. (3) constant operating pressure ...... open terminal constraint. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1966-03-31 |
| 巻 | 1巻 |
| 号 | 1号 |
| 開始ページ | 110 |
| 終了ページ | 115 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307978 |
| JaLCDOI | 10.18926/15551 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_1_84.pdf |
| 著者 | Misaki Takayoshi| Kato Osamu| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1966-03-31 |
| 巻 | 1巻 |
| 号 | 1号 |
| 開始ページ | 84 |
| 終了ページ | 90 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307680 |
| JaLCDOI | 10.18926/15546 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_1_54.pdf |
| 著者 | Moriwake Tosio| |
| 抄録 | Condensation of 6-methoxy- and 6-methylthio-2-propionaphthone with t-butyl α-bromoisobutyrate gave the corresponding t-butyl β-hydroxy esters in yields of 80 and 84% respectively. The treatment of the β-hydroxy esters with iodine in the presence of red phosphorus in boiling acetic acid effected reductive cleavage to produce 6-hydroxy- and 6-methylthio-α, α-dimethyl-β-ethyl-2 naphthalenepropionic acid in yields of 33 and 34% respectively. Reduction of the former ester in the presence of palladium-charcoal in acetic acid gave α, α-dimethyl-β-ethyl-6-methoxy-2-naphthalenepropionic acid in a 49% yield. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1966-03-31 |
| 巻 | 1巻 |
| 号 | 1号 |
| 開始ページ | 54 |
| 終了ページ | 58 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307698 |
| JaLCDOI | 10.18926/15544 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_1_47.pdf |
| 著者 | Takeda Akira| Wada Satosi| Ohmura Yutaka| |
| 抄録 | a-Chloro-N-arylisobutyrimidyl chloride (I) reacted with ethyl sodiomalonate to afford N-aryl-2,2-dimethyl-3 carbethoxysuccinimide. This reaction seems to proceed in a different mechanism from that of the synthesis of tetronic acids(2) and is supposed to involve a primary attack of the carbanion at the a-carbon atom of the chloride followed by the cyclization. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1966-03-31 |
| 巻 | 1巻 |
| 号 | 1号 |
| 開始ページ | 47 |
| 終了ページ | 50 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307888 |
| JaLCDOI | 10.18926/15543 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_1_44.pdf |
| 著者 | Takeda Akira| Torii Sigeru| |
| 抄録 | Acetylation of γ,γ-dimethyl-α,β-dicarbethoxybutyrolactone in benzene in the presence of sodium hydride was attempted. The structure of the condensation product was assigned to O-acetyl derivative, which was converted into γ,γ-dimethyl-β-carbethoxy-α-carboxybutyrolactone whose structure is also discussed by IR spectrum. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1966-03-31 |
| 巻 | 1巻 |
| 号 | 1号 |
| 開始ページ | 44 |
| 終了ページ | 46 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307861 |
| JaLCDOI | 10.18926/15538 |
|---|---|
| フルテキストURL | Mem_Sch_Eng_OU_1_13.pdf |
| 著者 | Kashiwada Yukio| Akiyama Koichi| |
| 抄録 | In order to make clear how the efflux angle changes in a small crankcase scavenged engine cylinder and in a large loop scavenged engine cylinder, the inlet flow pattern in the single cycle model cylinder has been observed by a high speed motion camera. In general, the scavenging air stream is not effluent in the designed direction of the scavenging port at comparatively slight opening, and the efflux angle changes in proportion to port opening advance. In a small crankcase scavenged engine cylinder, to keep the scavenging air stream in the direction of the scavenging port it is effective to incline the scavenging air passage between the crankcase and the cylinder, and to make thicker the cylinder wall where located scavenging port. In a large loop scavenged engine cylinder to coincide the scavenging air stream with the direction of the scavenging port in the early stage of the scavenging, it has an effect to set the guide plate the position of 1/2 at port height. |
| 出版物タイトル | Memoirs of the School of Engineering, Okayama University |
| 発行日 | 1966-03-31 |
| 巻 | 1巻 |
| 号 | 1号 |
| 開始ページ | 13 |
| 終了ページ | 22 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307846 |
| JaLCDOI | 10.18926/15518 |
|---|---|
| タイトル（別表記） | Clinical significance of spa therapy in patients with steroid-dependent intractable asthma |
| フルテキストURL | 065_119_127.pdf |
| 著者 | 谷崎 勝朗| 貴谷 光| 御舩 尚志| 光延 文裕| 梶本 和宏| 横田 聡| 高田 一郎| |
| 抄録 | 気管支喘息のなかでも,副腎皮質ホルモン依存性の喘息は,もっとも重症難治性であり,薬物療法のみでコントロールすることは極めて困難である｡著者らの現在までの成績では,このようなステロイド依存性重症難治性喘息に対して,温泉療法は有効であった｡このことは,喘息の治療,とりわけ重症難治例の治療には温泉療法が必要不可欠であることを示している｡今回は,その臨床的有用性および機序について,若干の考察を加えた｡1.臨床病型では,Ib型やII型に重症難治症例が多く,温泉療法はこれらの病型に対して有効であった｡2.年齢別検討では,発症年齢では30才以上,また現年齢では40才以上の症例に対して温泉療法は有効であった｡3.温泉療法による換気機能の改善では,小ないし細気管支領域の閉塞の改善がより高度であった｡4.温泉療法により,気道過敏性が低下することが観察された｡5.温泉療法により,高度に低下した副腎皮質機能の改善が見られた｡5.ヨードゾル吸入,鉱泥湿布療法,温泉プール水泳ないし歩行訓練などが,喘息の治療に適した温泉療法と判断された。 |
| キーワード | 重症難治性喘息 (intractable asthma) 換気機能 (ventilatory function) ヨードゾル吸入 (inhalation of iodine salt solution) 鉱泥湿布療法 (fango therapy) 温泉プール水泳訓練 (swimming training in a hot spring pool) |
| 出版物タイトル | 岡大三朝分院研究報告 |
| 発行日 | 1994-09 |
| 巻 | 65巻 |
| 開始ページ | 119 |
| 終了ページ | 127 |
| ISSN | 0918-7839 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002307310 |
| JaLCDOI | 10.18926/15510 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_25_2_39.pdf |
| 著者 | Nsunge Felix Chintu| 冨田 栄二| 浜本 嘉輔| |
| 抄録 | Velocity distributions and related parameters of transient and steady, turbulent air jets issuing under atmospheric conditions at Mach 0.14, 0.33 and 0.5 have been predicted using Navier-Stokes(N-S) equations for compressible flow and incompressible flow independently with the k-ε model. The closeness and consistence of the results predicted by the N-S equations for compressible and incompressible flows as well as with relevant measurement or similar prediction show that the incompressible flow assumption for at least some subsonic gas jets issuing at velocities higher than Mach 0.3, the general limit for incompressible fluid flow, can be reasonably accurate particularly in the main fully developed flow region. This suggests that the divergence term in source terms of the momentum, turbulence energy and its dissipation rate equations have negligible effects for some seemingly compressible high speed, subsonic free gas jets. The computation time is reduced by at least 18 % when incompressible flow assumption is used. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1991-03-28 |
| 巻 | 25巻 |
| 号 | 2号 |
| 開始ページ | 39 |
| 終了ページ | 54 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307456 |
| JaLCDOI | 10.18926/15508 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_25_2_25.pdf |
| 著者 | Nsunge Felix Chintu| 冨田 栄二| 浜本 嘉輔| |
| 抄録 | A suddenly started cold methane gas jet issuing from a 1 mm diameter orifice into still air at Mach one has been predicted using the two-equation, high Reynolds number version of k-ε turbulence model and SIMPLE algorithm which employs so called primitive variables and a hybrid scheme for treating combined diffusion and convection. Global trends of predicted radial distributions of velocity, temperature, methane concentration in the steady rear part of the transient jet and axial jet tip penetration compare reasonably well with universal profiles representing measurement for the steady jet particularly in the fully developed turbulent core and semi-empirical relation for the transient jet respectively. The prediction scheme has shown reasonably good accuracy especially in prediction of main flow parameters of a transient, high speed compressible gas jet issuing into a dissimilar surrounding gas(binary gas mixture jet). |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1991-03-28 |
| 巻 | 25巻 |
| 号 | 2号 |
| 開始ページ | 25 |
| 終了ページ | 38 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307676 |
| JaLCDOI | 10.18926/15498 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_25_1_99.pdf |
| 著者 | 西垣 誠| 竹下 祐二| 河野 伊一郎| |
| 抄録 | In this paper, a numerical procedure of determining hydraulic properties in multilayered aquifers are presented. From pumping test data in multilayered aquifers, the coefficient of permeability and specific storage for each aquifer are determined by using a combination of finite element analysis and nonlinear least-squares optimization technique. This study especially points out necessity of stress-flow coupling analysis to explain the behaviors of pressure head in multilayered aquifer during pumping test. As a example, practical pumping test data were evaluate and the coefficients of permeability and specific storage of aquifers and aquitard were obtained. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1990-12-14 |
| 巻 | 25巻 |
| 号 | 1号 |
| 開始ページ | 99 |
| 終了ページ | 109 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307452 |
| JaLCDOI | 10.18926/15493 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_24_2_17.pdf |
| 著者 | 小西 忠孝| 馬場 充| |
| 抄録 | Pressure distribution has been measured and analyzed to clarify the fundamental characteristics of "continuous oil-film" formed in a transparent journal bearing, into which oil in general use is supplied. Measured pressure mostly shows quasi-Sommerfeld distribution, which is characterized by downstream shift of pressure profile and underdevelopment of pressure trough compared with Sommerfeld distribution for perfect oil-film. Sommerfeld distribution is approximately observed only under limited conditions : low eccentricity and low speed. Quasi-Sommerfeld state is rather common in "continuous oil-film", unruptured film formed by using practical lubricants, than Sommerfeld state. Continuous oil-film is accompanied by fine bubbles and is controlled by the growing up or down of the bubbles. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1990-03-29 |
| 巻 | 24巻 |
| 号 | 2号 |
| 開始ページ | 17 |
| 終了ページ | 30 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307431 |
| JaLCDOI | 10.18926/15477 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_23_2_33.pdf |
| 著者 | Ishihara Yuji| 山本 恭二| |
| 抄録 | This paper deals with the low Mach numbers flow of a rarefied vapour past a liquid sphere accompanied with condensation and evaporation at its surface. The linearized Bhatnager-Gross-Krook(B-G-K} equation is used for the analysis, and from it the integral equations of the density, temperature and flow velocities are derived. These integral equations are solved numerically over a wide range of the Knudsen number covering from the slip flow to the nearly free molecular flow. The drag on the sphere is also calculated and is compared with that of previous work. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1989-03-30 |
| 巻 | 23巻 |
| 号 | 2号 |
| 開始ページ | 33 |
| 終了ページ | 44 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307401 |
| JaLCDOI | 10.18926/15460 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_28_2_45.pdf |
| 著者 | 東辻 浩夫| 橋本 成仁| 奈良 重俊| |
| 抄録 | Difficulties in simulating systems composed of classical and quantum particles lie in the treatment of the many-body interactions between quantum particles and the geometrical variety of configurations of classical particles. In order to overcome these difficulties, we have developed some numerical methods and applied them to simple cases. As for stationary states, the finite element method provides us with sufficient geometrical freedom. Combined with the Kohn-Sham equation based on the density functional theory, this method virtually satisfies our requirement. In order to investigate time-dependent phenomena, we apply the time-dependent Kohn-Sham equation. Adopting the finite difference method, we are able to follow the development of quantum many-body system. As an example, we estimate the effects of the potential height, the electric field, and many-body interactions in some transition processes in quantum wells coupled by a tunneling barrier. This example is important in itself in relation to semiconductor superlattices and also serves as a benchmark for quantum simulations, variety of geometry corresponding to that of classical particles. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1994-03-15 |
| 巻 | 28巻 |
| 号 | 2号 |
| 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 | 120002307158 |
| JaLCDOI | 10.18926/15456 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_28_2_21.pdf |
| 著者 | 山本 恭二| Jiao Xuezhen| |
| 抄録 | An experimental investigation has been made of the cyclone dust collector with a perforated internal rotating cylinder. The size of the rotating cylinder is of 0.5D, where D is the diameter of the cyclone body, and is the same size as the outlet tube. The dust collection efficiency as well as the pressure loss has been measured when the inlet flow speed is 9 ~ 21 m/s and the rotating speed of the cylinder is 37 ~ 63 m/s. The velocity and pressure distributions were also measured. It is found that the collection efficiency decreases and the pressure loss increases as the rotating speed increases. It is also shown that both the inward radial velocity and the upward vertical velocity become large as the rotating cylinder increases its speed. As a whole, the rotation of the internal cylinder makes worse performance of the cyclone dust collector. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1994-03-15 |
| 巻 | 28巻 |
| 号 | 2号 |
| 開始ページ | 21 |
| 終了ページ | 31 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307575 |