result 2728 件
| Author | Murakami, Naoki| |
|---|---|
| Published Date | 1988 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume100 |
| Issue | issue7-8 |
| Content Type | Journal Article |
| Author | Saeki, Shinsei| |
|---|---|
| Published Date | 1987-06-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume99 |
| Issue | issue5-6 |
| Content Type | Journal Article |
| Author | Okazaki, Satoru| |
|---|---|
| Published Date | 1987-06-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume99 |
| Issue | issue5-6 |
| Content Type | Journal Article |
| Author | Okazaki, Satoru| |
|---|---|
| Published Date | 1987-04-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume99 |
| Issue | issue3-4 |
| Content Type | Journal Article |
| Author | Sugihara, Toru| |
|---|---|
| Published Date | 1987-04-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume99 |
| Issue | issue3-4 |
| Content Type | Journal Article |
| Author | Kondoh, Shintaroh| |
|---|---|
| Published Date | 1988 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume100 |
| Issue | issue1-2 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/15840 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_21_2_31.pdf |
| Author | Taniguchi Takeo| Sanada Kenji| Matsumoto Hajime| Moriwaki Kiyoaki| |
| Abstract | The aim of this paper is to present some remarks on the arrangement of finte element mesh modeling of the area adjacent to the crack-tip which locates in two-dimensional area. Since the stress distribution near crack-tip is singular, the arrangement of mesh pattern and the selection of mesh type in the crack area govern the accuracy of the solution. This paper gives some informations on the arrangement of finite elements in the area which are obtained through numerous number of numerical experiments. And the effectivity of Zooming Technique for stress analysis is clarified through the experiments. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1987-03-05 |
| Volume | volume21 |
| Issue | issue2 |
| Start Page | 31 |
| End Page | 45 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307123 |
| JaLCDOI | 10.18926/15839 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_21_2_21.pdf |
| Author | Myojin Sho| Kishino Keiichi| |
| Abstract | Car ownership in households is analyzed by disaggregate behavioral modeling technique. Two models are built to analyze characteristic features of car ownership. The results are (1) The number of driver licenses in a household is, as a matter of course, most influencing on car ownership and multi-ownership. (2) Family size is the second most influencing. (3) Utilily obtainable by owning second or third car is higher in the household of primary industry than that of the other industry. (4) Inclination of household to be car owner is stronger in a sparsely inhabited zone than in a densely inhabited. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1987-03-05 |
| Volume | volume21 |
| Issue | issue2 |
| Start Page | 21 |
| End Page | 30 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307983 |
| JaLCDOI | 10.18926/15835 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_21_1_71.pdf |
| Author | Takeshita Yuji| Nishigaki Makoto| Kohno Iichiro| |
| Abstract | It is difficult to determine the coefficients of groundwater flow from the data which were obtained from the drawdown test in a multiaquifer system. In this paper, new methods of analyzing drawdown-tests are developed and illustrated with the example to determine aquifer coefficients. In a double-layered aquifer, the analytical solution of drawdown test, in which water is discharged from both layers, is derived. And also the theoretical solution to determine the coefficient of storage by using an index of elasticity of a confined aquifer is derived. From these solutions, methods of determining the coefficient of transmissibility in a double-layered aquifer and the coefficinent of storage in a confined aquifer are got. The example analysis to determine aquifer coefficients is shown. As a result, the characteristics which were obtained by these methods are verified by the real drawdown test data. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1986-11-15 |
| Volume | volume21 |
| Issue | issue1 |
| Start Page | 71 |
| End Page | 79 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307954 |
| JaLCDOI | 10.18926/15825 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_20_2_55.pdf |
| Author | Taniguchi Takeo| Mitsuoka Kazuhiko| Kajitani Eiji| |
| Abstract | In this study a new automatic mesh generator for 2- dimensional finite element analysis is proposed, and its effectivity is surveyed through a number of test examples. Proposed one is for a micro-computer, and the program is written in BASIC. The user needs no preparation for making finite element model in advance. All of the neccessary informations are displayed on CRT display and its user may answer for questions. It is expected that the cost neccessary for preparing the input-data for finite element analysis is largely decreased. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1986-02-28 |
| Volume | volume20 |
| Issue | issue2 |
| Start Page | 55 |
| End Page | 66 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307353 |
| JaLCDOI | 10.18926/15823 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_20_2_47.pdf |
| Author | Inouye Hiroshi| |
| Abstract | When expressway and roads coexist, it is necessary to establish a reasonable traffic share between them. It may be practiced by the regulation of toll-rate of expressway. But at an occasional traffic congestion, the reasonable share is disturbed, so that some traffic control means should be taken. In this paper, we deal how to control inflows on expressway, from a viewpoint of the optimal share between expressway and roads. The minimization of total travel cost in a system is aimed under traffic equilibrium conditions. The problem is formed as a two-stage programming model, and a simple example solving the problem is showed. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1986-02-28 |
| Volume | volume20 |
| Issue | issue2 |
| Start Page | 47 |
| End Page | 53 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307423 |
| JaLCDOI | 10.18926/15813 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_16_2_89.pdf |
| Author | Kohno Iichiro| Nishigaki Makoto| |
| Abstract | In this paper are described on the finite element analysis of the nonsteady behavior of interface between salt- and freshwater in coastal groundwater. In order to investigate the validity and the accuracy of this numerical analysis solution, the results calculated by this finite element analysis have been compared with the laboratory model tests. The numerical results showed the very good agreement with the experimental data. Moreover, some applications of this analytical method have been performed. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1982-03-29 |
| Volume | volume16 |
| Issue | issue2 |
| Start Page | 89 |
| End Page | 99 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307453 |
| JaLCDOI | 10.18926/15810 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_16_2_59.pdf |
| Author | Hida M.| Maeda H.| Tanabe K.| Kamijo N.| Terauchi H.| |
| Abstract | The EXAFS spectroscopy equipment constructed from an asymmetrical cut flat monochromator and PSPC is applied to the structural determination of pure α-iron which has small difference (0.038nm) in the first and second nearest neighbour distance. The efficiency of the curve fitting method for the two shell model of known structure material (α-iron) is discussed, in addition to describing the details of the experimental procedure of our new type of spectrometer and of the EXAFS data analysis. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1982-03-29 |
| Volume | volume16 |
| Issue | issue2 |
| Start Page | 59 |
| End Page | 74 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307651 |
| JaLCDOI | 10.18926/15809 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_16_2_45.pdf |
| Author | Funabiki Shigeyuki| Iyasu Masakatsu| Kamura Tsutomu| Himei Toyoji| |
| Abstract | In this paper, the analysis of transient performance of two-phase induction motor driven by a voltage source inverter with current limiter is described. The motor is represented by using a two-axis model, that is, the Kron primitive machine. The state equations of mechanical-electrical system are derived. The calculation method with a discrete point of time is employed in order to decrease the CPU time of computer. The calculated results gained from this method agree well with the measured. Then, with the aid of this analytical method, the discussions on transient performance of this system are also performed. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1982-03-29 |
| Volume | volume16 |
| Issue | issue2 |
| Start Page | 45 |
| End Page | 58 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307761 |
| JaLCDOI | 10.18926/15807 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_16_2_31.pdf |
| Author | Himei Toyoji| Nakanishi Sen-ichiro| Funabiki Shigeyuki| |
| 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. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1982-03-29 |
| Volume | volume16 |
| Issue | issue2 |
| Start Page | 31 |
| End Page | 43 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307371 |
| JaLCDOI | 10.18926/15801 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_16_1_125.pdf |
| Author | Inouye Hiroshi| Oda Shinji| |
| Abstract | A system dynamics model to forecast future movements of a city was studied. The model consists of three sections of population sector, industry sector, land use sector and some divisions of labor, income employment, housing land which connect each sections. Economic growth rate, public investment program, housing land supply program were incorporated in the model as political variables. The model was applied to Okayama city for thirty years from 1975 to 2005. The results of the simulation are summarized as follows: 1) The drift of peoples into Okayama city will advance in the future. 2) Tertiary industries will be given much weight as compared with secondary industries. 3) Because of the drift of peoples, housing problems will be serious in the future. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1982-03-01 |
| Volume | volume16 |
| Issue | issue1 |
| Start Page | 125 |
| End Page | 145 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308014 |
| JaLCDOI | 10.18926/15799 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_16_1_105.pdf |
| Author | Myojin Sho| Asai Kazuhiko| |
| Abstract | A welfare economic approach is tried to an optimal decision of toll rate and expansion of urban expressway network in an equilibrium of toll revenues and cost of service supplied. The model, originated with Yamada, is such that the decision comes into optimality when the maximum consumers' surplus is reached in the equilibrium condition. The paper is concerned with some general aspects of the optimal solution and reexamination of the solution obtained in the past when used a specific demand curve. General aspects obtained are as follows; The extremum condition to consumers' surplus is equivalent to that to diverted traffic (the realized number of expressway users) only when demand curve has such a property that the marginal consumers' surplus to network expansion vanishes. In case that the marginal consumers' surplus does not vanish, the extrema of consumers' surplus is found in the regions of negative marginal diverted traffic if demand curve yields positive marginal surplus, and in the regions of the positive if it gives negative marginal surplus. The contact points of demand and average cost curves give extrema of neither consumers' surplus nor diverted traffic. An implicative finding, made out by Yamada by using a specific demand curve, that optimal network expansion is reached when the marginal service cost to expansion averaged to the marginal diverted traffic to expansion is equal to the value of time saved by using expressway just by mean trip length holds good at the points of the maximum diverted traffic, but not at the contacts of demand and average cost curves. In case of the demand curve, the condition for an equilibrium of revenues and cost to come into existence is that the minimum of the ratio of service cost averaged to the whole population of expressway users to the value of time mentioned above is less than or equal to e(-1). |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1982-03-01 |
| Volume | volume16 |
| Issue | issue1 |
| Start Page | 105 |
| End Page | 123 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307932 |
| JaLCDOI | 10.18926/15794 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_19_2_13.pdf |
| Author | Koga, Ryuji| Kosaka, Megumi| Sano, Hiroya| |
| Abstract | A quasi-random method for spectral scanning is proposed to reduce an alias response to a quick change in the source abundance. A direct application is made for an atmospheric methane monitoring with a current-tunable diode laser. Only barrel shift methods are examined being found further vulnerable to drifting etalon fringes. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1985-02-25 |
| Volume | volume19 |
| Issue | issue2 |
| Start Page | 13 |
| End Page | 22 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308000 |
| JaLCDOI | 10.18926/15782 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_15_2_133.pdf |
| Author | Mori Chuji| Taniguchi Takeo| Kimoto Teruyuki| |
| Abstract | From the theoretical approach to the fill-in minimization problem we present one of the optimal vertex elimination process for a regular finite element mesh M (nxn), and through a number of numerical experiments it is verified that the new process model can always lead to better numerical results comparing to other methods presently in use. Since the process here presented cann't give the actual dissections of M but can clarify how the optimal elimination is, the process includes George's Nested Dissection Method and the method by Duff, Erisman and Reid. By this investigation we can conclude that l) the concept of "Dissection" is neccessary for minimizing the number of fill-ins, 2) the location of the dissection lines can be systematically decided even if n of M is odd or even number, and though the interior area of M is dissected as George's Method, the surrounding area of M is rather irregularily dissected, and 3) the model of the vertex elimination process given in this paper is applied to other kind of regular finite element mesh or finite difference mesh, too. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1981-03-30 |
| Volume | volume15 |
| Issue | issue2 |
| Start Page | 133 |
| End Page | 146 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307564 |
| JaLCDOI | 10.18926/15763 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_15_1_101.pdf |
| Author | Taniguchi Takeo| Numata Katsu| |
| Abstract | In this paper the fill-in minimization problem which arises at the application of the sparse matrix method for a large sparse set of linear equations is discussed from the graph-theoretic viewpoint and also through the numerical experiments. Therefore, this investigation consists of two parts, and in the former part the author shows, at first, that the elimination process of a sparse matrix is equivalently replaced to the vertex eliminations for a graph obtained from the matrix, and by use of some concepts in the theory of graph he proves that the vertex elimination process for the minimum fill-in is equivalent to the vertex eliminations for vertices in each subgraph which is obtained by the appropriate dissection of whole graph, and that there are only two types of vertex eliminations through the process. This results in the proposal of a new model of the vertex elimination process. The latter part of this investigation is used for the verification of the results from the theoretic investigation. Through the numerical experiments he concludes that the new model of the vertex elimination process is valid, at least, for a graph like a regular finite element mesh. Furthermore, he shows that this model coincides with Nested Dissection Method which can give the minimum value of fill-in, at present. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1980-11-29 |
| Volume | volume15 |
| Issue | issue1 |
| Start Page | 101 |
| End Page | 110 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307966 |
