result 7192 件
| JaLCDOI | 10.18926/15392 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_27_1_45.pdf |
| Author | Kagawa, Naoki| Wada, Osami| Hai, Xu| Koga, Ryuji| Sano, Hiroya| Inubushi, Kazuyuki| |
| Abstract | A prototype device based on the tunable diode laser absorption spectrometry was constructed and the atmospheric methane concentration near the terrain in a rice paddy field was measured. An open optical path of 50 m length was employed along with a PbSnTe diode laser. Diurnal change of methane density with 30 seconds temporal resolution was recorded associated with meteorological parameters. A feasibility was proven for a practical application for in situ study of atmospheric methane. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1992-11-25 |
| Volume | volume27 |
| Issue | issue1 |
| Start Page | 45 |
| End Page | 53 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307877 |
| JaLCDOI | 10.18926/15389 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_30_1_121.pdf |
| Author | Kuk Hun| Tanino, Tetsuzo| Tanaka, Masahiro| |
| Abstract | In this paper we provide some theoretical results on stability and sensitivity analysis in convex vector optimization. Given a family of parametrized vector optimization problems, the perturbation maps are defined as the set-valued map which associates to each parameter value the set of minimal points (properly minimal points, weakly minimal points) of the perturbed feasible set with respect to an ordering convex cone. Sufficient conditions for the upper and lower semicontinuity of the perturbations map are obtained. We also provide quantitative properties of the perturbation maps under some convexity assumptions. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1995-12-28 |
| Volume | volume30 |
| Issue | issue1 |
| Start Page | 121 |
| End Page | 131 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307414 |
| JaLCDOI | 10.18926/15386 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_30_1_111.pdf |
| Author | Ye Ju| Tanaka, Masahiro| Tanino, Tetsuzo| |
| Abstract | Mutation is one of the important operators in genetic algorithm. In traditional genetic algorithm, mutation is activated stochastically. In this way it is unknown and cannot be controlled for which individuals to be mutated. Therefore, it is unavoidable that some good individuals are destroyed by mutation and then the evolutionary efficiency of the genetic algorithm is dampened. Owing to this kind of destructivity of mutation, the operator of mutation has to be limited within a very small probability, and the potentiality of mutation is consequently limited. In this paper, we present an evolutionary chain-based mutation and a control strategy of reasonable competition, in which the heuristic information provided by the evaluation function is well utilized. This method avoids the blindness of stochastic mutation. The performance improved in this method is shown by two examples, a fuzzy modeling for the identification of a nonlinear function and a typical combinatorial optimization problem-the traveling salesman problem. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1995-12-28 |
| Volume | volume30 |
| Issue | issue1 |
| Start Page | 111 |
| End Page | 120 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307635 |
| JaLCDOI | 10.18926/15384 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_30_1_99.pdf |
| Author | Wang, Ming| Wada, Osami| Koga, Ryuji| |
| Abstract | A cylindric mirror was used, in place of a parabolic mirror, to collimate the crescent blue laser beam radiated from the Cerenkov SHG in channel waveguide configuration. The cylindric mirror radius is requested to be twice the focal length of the parabolic mirror. The focusing effect of the cylindric mirror in collimation can be compensated by slightly lifting the mirror in its normal direction. Under the condition that the mirror was declined by 5.56° and lifted by 25 μm, we got the collimated beam with divergence angle less than 1.3 mrad. In the focusing experiment, the collimated beam was focused with spotsize of 1.8 μm. The details on the analysis and experiment are reported. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1995-12-28 |
| Volume | volume30 |
| Issue | issue1 |
| Start Page | 99 |
| End Page | 110 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307418 |
| JaLCDOI | 10.18926/15376 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_35_183.pdf |
| Author | Tabuchi Satoshi| Osaki, Hirokazu| Kajihara, Yasuhiro| Munesawa, Yoshiomi| |
| Abstract | This research proposes a strategy for reducing both electricity charge and environmental load by considering multi energy sources. The reduction of the contract electric demand is considered, and its differential cost is used for purchasing substitute power sources. Some variables, such as the amount of reduced contract demand, and amount of electricity are generated by each substitute power source. By using those variables, we formulate a simulation model that enables to minimize the energy cost and environmental cost. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2001-03-27 |
| Volume | volume35 |
| Issue | issue1-2 |
| Start Page | 183 |
| End Page | 189 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307173 |
| JaLCDOI | 10.18926/15371 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_35_163.pdf |
| Author | Uchiyama Hiromitsu| Miyazaki Satoshi| Osaki, Hirokazu| Kajihara, Yasuhiro| Munesawa, Yoshiomi| Matsuki Katsunori| |
| Abstract | We develop an assembly robot system for assembling the flexible belt-shaped subject. An image processing method is developed to recognize the belt-shaped subject. This method is able to determine the grasping point and grasping angle for piking up a subject by a multiple hands unit. CAD information is used to determine the grasping point. The multiple hands unit is developed, which is able to grasp all grasping points of a subject at a time. In addition, the image processing method is used to judge whether a subject is fastened accurately at right position or not during the assembly. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2001-03-27 |
| Volume | volume35 |
| Issue | issue1-2 |
| Start Page | 163 |
| End Page | 168 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307229 |
| JaLCDOI | 10.18926/15370 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_27_2_73.pdf |
| Author | Kroumov Valeri T.| Inoue, Akira| Masuda, Shiro| |
| Abstract | This report deals with the problem of designing an adaptive observer for estimating unknown periodical disturbances. This is very practical problem because in the area of control of servomechanisms such disturbances are always encountered. When the disturbance cannot be directly measured or eliminated at the source it is necessary to perform a prediction. When a periodical disturbance is present the frequencies appear as unknown parameters and they have to be identified. In order to identify the unknown parameters, it is necessary to transform the composite system model, which contains the models of the controlled system and the disturbances, into observable canonical form. In addition, an inverse transformation is required to calculate the estimates of the present disturbances. In this report, firstly, a review of an adaptive observer for estimation of unknown periodical disturbances is presented. Later a calculation of the disturbance estimate is derived using the algebraic programming system REDUCE. The proposed method here allows to perform all the necessary transformations and to obtain the disturbance estimation without using the transformation matrix. The calculations of these transformations are complicated and, hitherto, there is no simple method to perform them. The results of disturbance estimation are illustrated by two examples. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1993-03-25 |
| Volume | volume27 |
| Issue | issue2 |
| Start Page | 73 |
| End Page | 85 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307731 |
| JaLCDOI | 10.18926/15367 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_30_1_9.pdf |
| Author | Ding Ronggui| Osaki, Hirokazu| |
| Abstract | Decision Support Systems (DSS) have been taken as hopeful support tools for decision making for more than 20 years. There are a lot of literatures on DSS, but most of them are not so practical as the designers expected. This paper points out the crux of this situation and argues that the research on DSS should pay some more attention to the decision making activities before the model using stage. A method named "Problem Situation Decomposing Graph (PSDG)" is presented in this paper for helping the decision maker(DM) elicit the decision making problems. A PSDG is an acycle AND/OR logical directed graph, and which includes all the factors affecting the problem situation based on the DM's knowledge. The logical nodes and parameter determining methods in PSDG can reflect the DM's decision making style. This paper introduces some basic concepts of PSDG, discusses some of its characteristics, and proposes a logical adjacency matrix for PSDG representation and analysis. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1995-12-28 |
| Volume | volume30 |
| Issue | issue1 |
| Start Page | 9 |
| End Page | 17 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307826 |
| JaLCDOI | 10.18926/15363 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_34_39.pdf |
| Author | Hayakawa, Satoshi| Shirosaki, Yuki| Yabuta, Takeshi| Tsuru, Kanji| Ohtsuki Chikara| Osaka, Akiyoshi| |
| Abstract | Silicone elastomer was chemically treated at 60℃ for 7 days with 30 wt% H(2)O(2) solutions with or without TaCl(5) and soaked for various periods in a simulated body fluid(Kokubo solution) up to 21 days. Apatite formation ability of the surface of the silicone elastomer specimens was investigated with thin-film X-ray diffraction and FT-IR reflection spectroscopy. These silicone specimens did not deposit apatite or calcium phosphates, irrespective of chemical treatment. Osteoblast-like cells (MC3T3-El) derived from mouse were cultured on the specimens at 36.5℃ under 5%C0(2) and 95% humidity. Similar degree of proliferation of cells was observed at 7 days among three specimens, while the no treatment specimen after incubation for 5 days showed a lower degree of proliferation than the silicone treated with 30 wt% H(2)O(2) solutions with or without TaCl(5). Alkaline phosphatase activity of the cells proliferated on the no treatment specimen was lower than those of the silicone treated with 30 wt% H(2)O(2) solutions with or without TaCl(5). These results indicate that the cytotoxicity of the silicone could be improved by the chemical treatment with 30 wt% H(2)O(2) solutions with or without TaCl(5). |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2000-03-27 |
| Volume | volume34 |
| Issue | issue1-2 |
| Start Page | 39 |
| End Page | 43 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308019 |
| JaLCDOI | 10.18926/15362 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_35_97.pdf |
| Author | Yamasaki, Susumu| Kurose, Yoshinori| |
| Abstract | In this paper, we formulate a new integrity constraint in correlation with 3-valued stable models in an abduction framework based on general logic programs. Under the constraint, not every ground atom or its negation is a logical consequence of the theory and an expected abductive explanation, but some atom may be unspecified as a logical consequence by an adjustment. As a reflection of the integrity constraint with an adjustment, we augment an adjusting derivation to Eshghi and Kowalski abductive proof procedure, in which such an unspecified atom can be dealt with. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2001-03-27 |
| Volume | volume35 |
| Issue | issue1-2 |
| Start Page | 97 |
| End Page | 135 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307812 |
| JaLCDOI | 10.18926/15361 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_35_77.pdf |
| Author | Kishimoto Tokunari| Totsuji, Chieko| Tsuruta, Kenji| Totsuji, Hiroo| |
| Abstract | In order to perform the large-scale molecular dynamics simulation of the Yukawa system, a mathematical expression for molecular dynamics using the fast multipole method is described. The model simulations are also performed to test the performance of our implementation of the FMM. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2001-03-27 |
| Volume | volume35 |
| Issue | issue1-2 |
| Start Page | 77 |
| End Page | 95 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307940 |
| JaLCDOI | 10.18926/15360 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_34_27.pdf |
| Author | Wei, He| Koga, Ryuji| Iokibe, Kengo| Wada, Osami| Toyota, Yoshitaka| |
| Abstract | In spring of 1998, Asian dust was observed with a Mie LIDAR in Okayama University, which can measure depolarization ratio. Three events of intense Asian dust were occurred in the period and medially detailed structure of atmosphere was found after examining records. Asian dust was distinguished from water droplets and the possibility to study three dimensional dynamic structure of atmosphere were demonstrated. |
| Keywords | Mie lidar Asian dust (KOSA) depolarization ratio backscattering ratio range normalized |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2000-03-27 |
| Volume | volume34 |
| Issue | issue1-2 |
| Start Page | 27 |
| End Page | 37 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307539 |
| JaLCDOI | 10.18926/15359 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_34_19.pdf |
| Author | Okada, Akira| Uno, Yoshiyuki| Okajima, Isao| |
| Abstract | In EDM, the machining characteristics greatly depend on the energy distribution. Therefore, it is very important to clarify the energy distribution for understanding various phenomena in EDM. In this paper, the energy distribution in EDM with graphite electrode is investigated by measuring the temperatures of electrode and workpiece. Experimental analysis shows that the material removal rate depends on energy density while the electrode wear greatly depends on the adhesion of heat resolved carbon from machining fluid, and the energies distributed into electrode and workpiece are almost constant regardless of pulse duration. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2000-03-27 |
| Volume | volume34 |
| Issue | issue1-2 |
| Start Page | 19 |
| End Page | 26 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307707 |
| JaLCDOI | 10.18926/15358 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_35_63.pdf |
| Author | Shinomiya Shigeru| Totsuji, Chieko| Tsuruta, Kenji| Totsuji, Hiroo| |
| Abstract | We present a theoretical study of Si(1-x)Ge(x) alloys based on tight-binding molecular dynamics (TBMD) calculations. First, we introduce a new set of nonorthogonal tight-binding parameters for silicon and germanium based on the previous work by Menon and Subbaswamy [Phys. Rev. B 55, 9231 (1997); J. Phys: Condens. Matter 10, 10991 (1998)]. We then apply the method to structural analyses of Si(1-x)Ge(x) alloys. The equilibrium volume and atomic structure for a given x are obtained by the TBMD method. We also calculate the bulk modulus B, elastic constants C(11), C(12) and C(44) as a function of x. The results show that the moduli vary monotonically, but nonlinearly, between the values of Si crystal and Ge crystal. The validity of the results is also discussed. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2001-03-27 |
| Volume | volume35 |
| Issue | issue1-2 |
| Start Page | 63 |
| End Page | 75 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307673 |
| JaLCDOI | 10.18926/15357 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_35_53.pdf |
| Author | Kim Tae Yong| Kagawa, Yukio| |
| Abstract | Fresnel zone plate lens (FZPL) has widely been used in electromagnetic antenna applications. Most analysis method based on the potential (scalar) wave approximation has been applied to a few very limited and simplified cases. The present paper analyzes the FZPL in more general form including the diffraction and transmission using the method of moments (MoM). The focusing gain characteristics in the oblique incidence as well as in the normal incidence are considered. The MoM solution using the three-dimensional vectorial formulation requires a large memory space for the FZPL as it is operated at a short wavelength. This is simply overcome by using an iterative conjugate gradient method for the numerical evaluation. The MoM solutions are compared with the other solutions. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2001-03-27 |
| Volume | volume35 |
| Issue | issue1-2 |
| Start Page | 53 |
| End Page | 61 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307849 |
| JaLCDOI | 10.18926/15354 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_34_1.pdf |
| Author | Song Baoyin| Inaba, Hideo| Horibe, Akihiko| Takahashi Takashi| |
| Abstract | The experiment for investigating the falling snow melting characteristics of warm water flowing along sheet channels spread on a roof was performed in Tookamachi city, Nigata prefecture from February 6 to February 7, 1995. The sheet surface temperatures at 11 positions in 3 channels were measured. A physical model for a gas-water-snow system was constructed to compare the predicted results with the measured ones. A fully spread uniform water film in the sheet channel was observed in the experiments. The experimental results elucidated that it was feasible to use warm water flowing along sheet channels for melting falling snow on roofs. The temperature drop in the sheet channel mainly depended on the snowfall intensity, atmospheric temperature and wind speed. Under the influence of the roof edge, the temperature drop in the channel next to the side edge was much larger than that in middle channels. A water-snow two phase flow or a snow covered frozen water was experienced temporarily in the lower reaches of the water flowing channel. These suggest that a larger water flow rate is needed for the channel next to the roof edge, and a higher inlet temperature or a greater water flow rate is required for a severe weather condition. There was reasonably good agreement between the measured and predicted water temperatures. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2000-03-27 |
| Volume | volume34 |
| Issue | issue1-2 |
| Start Page | 1 |
| End Page | 12 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307686 |
| Author | Takuma, Masae| Masui, Etsuko| Hayashimoto, Kanae| Asaumi, Noboru| Tachibana, Hideo| Ochi, Koji| Harada, Hideo| |
|---|---|
| Published Date | 1991-08 |
| Publication Title | 環境病態研報告 |
| Volume | volume62 |
| Content Type | Others |
| JaLCDOI | 10.18926/15348 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_35_21.pdf |
| Author | S.kovalenko, Volodymyr| Uno, Yoshiyuki| Okamoto, Yasuhiro| Anyakin, M.| Lutay, A.| Shubul, Khaled Al.| |
| Abstract | In electric power industry, there is a problem of achieving stable joint in different components using high productive and efficient technologies. One type of these components is packages of slices for magnetic circuit of electric motors, transformers etc., which need reliable means for their fixing. Laser welding is proposed to solve this problem as an alternative for existing technologies. The development of the laser welding process is presented based on process simulation, study of heat history and comparison with experimental results. Laser beam additional scanning technique is proposed to improve the quality and efficiency of the joining operation. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2001-03-27 |
| Volume | volume35 |
| Issue | issue1-2 |
| Start Page | 21 |
| End Page | 28 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307424 |
| JaLCDOI | 10.18926/15295 |
|---|---|
| Title Alternative | A study on actual conditions of care for the elderly in urban and rural areas of Okayama prefecture |
| FullText URL | 007_2_149_157.pdf |
| Author | Ohta, Niwa| |
| Abstract | 高齢者の在宅ケアの必要性が増大している一方,女性の就労者の増加や核家族化は在宅でのケアを困難にしている。そこで,実際にどのような現状や問題があるのかを検討する必要があると考えた｡今回,全国の高齢化率(14.1%)より高い高齢化率(16.9%)の岡山県で,在宅ケアの実態を1995年8月から9月にかけて調査した｡都市部(岡山市)･農村部(高梁市･邑久町･久米南町)で比較すると,在宅ケアは都市部に比べ農村部が少なく,農村部では施設での介護の方が多いことを認めた｡分析対象は140名で都市部が39名,農村部が101名である｡在宅でケアを受ける75歳以上の高齢者は77.1%と多かった｡農村部の方が高年齢で障害度も重く,特に過疎地域では介護期間も長く5年以上が過半数を占めていた｡主たる介護者は都市部では配偶者が63%と多かった｡過疎の農村部では息子の妻および孫の妻が多く,また70歳以上の高齢の介護者が3分の1を占めていた｡入浴･更衣回数などのケア回数は県北の農村部では特に少なかった｡また家族の介護時間は都市部は1日につき約7時間であったが,農村部では約3時間のみであった｡保健婦･看護婦などの専門職者によるサービスは都市部に多く,ホームヘルパーによるサービスは農村部に多かった。民間のサービス利用率は都市部･農村部いづれも低かった｡以上のごとく農村部における高齢者の介護がより問題が多く,深刻な状況であることが明らかになった｡ |
| Keywords | 高齢者 (the elderly) 在宅ケア (home care) 都市部 (urban area) 農村部 (rural area) 岡山県 (Okayama prefecture) |
| Publication Title | 岡山大学医療技術短期大学部紀要 |
| Published Date | 1997-01-31 |
| Volume | volume7 |
| Issue | issue2 |
| Start Page | 149 |
| End Page | 157 |
| ISSN | 0917-4494 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002307982 |
| JaLCDOI | 10.18926/15291 |
|---|---|
| Title Alternative | Senior high school students' recognition and interest in allied medical education of college |
| FullText URL | 007_2_113_120.pdf |
| Author | Ohta, Takeo| Shimoishi, Yasuaki| Kageyama, Jingo| Shibuya, Koichi| Tohge, Hiroko| Endo, Hiroshi| |
| Abstract | 1996年7～9月にかけて,岡山県周辺の10県下高校普通科3年在学中の学生に志望進路,志望分野とともに大学,短期大学における医療技術教育への認識と関心についてアンケート調査を行った｡サンプリングによって依頼した127校のうち回答が得られたのは52校(回収率40.9%)で,得られた回答数は合計1,998人(男子891人,女子1,077人,不明30人)であった｡これらの分析から,これらの地域では進学志望者の率は高く,特に男子に著名で,男女ともに理系への志望が多いことを認めた｡医療技術系大学の認識は看護学科を除いて低く,関心も特に男子で低かった｡4年制大学の進学を志望する学生にとっては, 3年制の多い医療技術系短期大学には関心が寄せがたく, 4年制へ移行した場合には関心も志望も高まる事が認められた｡将来この分野を担う人材の確保には現在の医療短大の4年制化や医療技術職の待遇改善が重要である と結論づけた｡ |
| Keywords | 医療技術教育 (the allied medical education) 高校生 (senior high school students) 短期大学 (junior college) 大学 (college) 進学 (high school students wishing to go on to college) |
| Publication Title | 岡山大学医療技術短期大学部紀要 |
| Published Date | 1997-01-31 |
| Volume | volume7 |
| Issue | issue2 |
| Start Page | 113 |
| End Page | 120 |
| ISSN | 0917-4494 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002307378 |
