検索結果 47755 件
| JaLCDOI | 10.18926/fest/11556 |
|---|---|
| フルテキストURL | 003_011_024.pdf |
| 著者 | 渡辺 雅二| |
| 抄録 | We study a system that models a problem in which an oscillatory unit is coupled to a passive medium. We analyze the case in which an RCL circuit is coupled to an RC circuit. Some numerical results indicate when slow oscillations occur in coupled systems. |
| キーワード | coupled circuits Van der Pol's equation slow oscillations |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 1998-01-14 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 11 |
| 終了ページ | 24 |
| ISSN | 1341-9099 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002313697 |
| JaLCDOI | 10.18926/fest/11555 |
|---|---|
| タイトル（別表記） | Simulations of Heel Impact by Viscoelastic Models |
| フルテキストURL | 005_013_021.pdf |
| 著者 | 小久保 雅仁| 佐々木 徹| |
| 抄録 | The purpose of this study is to make some body models with viscoelastic model, to simulate the heel impact and to obtain the ground reaction force. In this paper, we build up body models of linear viscoelastic elements and mass elements to simulate heel impact. Here we consider the systems of linear differential equations numerically for the preparation of mathematical analysis in future. The simplest model with two mass elements is hardly able to simulate the heel impact if the rate of mass of elements is realistic. The models with more elements are suitable to simulate for actual rate of weight of body segments. The model with three mass elements makes it possible to guess the force to each body segment. |
| キーワード | Running Heel Impact Viscoelastic Model Biomechanics |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2000-02-29 |
| 巻 | 5巻 |
| 号 | 1号 |
| 開始ページ | 13 |
| 終了ページ | 21 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313531 |
| JaLCDOI | 10.18926/fest/11554 |
|---|---|
| フルテキストURL | 003_005_009.pdf |
| 著者 | 石川 洋文| |
| 抄録 | We investigate the Maass wave form for Γ(0)(2) whose eigenvalue of Laplacian Δ is 1/4-π(2)/log(2)(√2-1). In this note, we study the methods of calculation of its Fourier coefficients and carry out the numerical calculations. |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 1998-01-14 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 5 |
| 終了ページ | 9 |
| ISSN | 1341-9099 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002313535 |
| JaLCDOI | 10.18926/fest/11553 |
|---|---|
| タイトル（別表記） | Mathematical analysis of pathogenesis of viral hepatitis. |
| フルテキストURL | 005_007_011.pdf |
| 著者 | 佐々木 徹| 梶原 毅| |
| 抄録 | Simple mathematical models are considered to explain the pathogenesis of viral hepatitis. Dynamics of populations of liver cells and two virus strains are analyzed qualitatively. This analysis suggests the possibility that the viral mutation causes the hepatitis from the state of carrier. |
| キーワード | hepatitis mathematical model mutation |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2000-02-29 |
| 巻 | 5巻 |
| 号 | 1号 |
| 開始ページ | 7 |
| 終了ページ | 11 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313400 |
| JaLCDOI | 10.18926/fest/11552 |
|---|---|
| フルテキストURL | 003_001_003.pdf |
| 著者 | 中島 惇| |
| 抄録 | The existence of a derivation in a near-ring is not known. We construct derivations on 2×2 matrix near-ring in the sense of [MW]. |
| キーワード | Near-ring matrix near-ring derivation |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 1998-01-14 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 3 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313635 |
| 著者 | 宝来 真志| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| 著者 | 永井 伊作| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| 著者 | 槇 修一| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| JaLCDOI | 10.18926/fest/11548 |
|---|---|
| フルテキストURL | 005_001_006.pdf |
| 著者 | 石川 洋文| 石井 明| 金子 明| |
| 抄録 | We have estimated the degree of transmission of Plasmodium vivax malaria in Vanuatu Islands, eastern Melanesia with the aid of the computer simulations, which has been carried out on the platform of a mathematical transmission model. The malaria caused by Plasmodium vivax has a relapse character, which arises from hypnozoites in the liver. This phenomen makes a malaria control strategy difficult. When the mass drug administration is executed, the prevalence of Plasmodium vivax decreases moderately as compared with that of Plasmodium falciparum, and it recovers before long being affected by the relapses. The simulations suggest that one cannot attain the eradication of Plasmodium vivax malaria without the concentrated execution of the mass drug administration and the vector control that fairly reduces the vactorial capacity. |
| キーワード | Plasmodium vivax computer simulation hypnozoite mass drug administration relapse |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2000-02-29 |
| 巻 | 5巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 6 |
| ISSN | 1341-9099 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002313438 |
| 著者 | 清水 健一| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| JaLCDOI | 10.18926/fest/11546 |
|---|---|
| タイトル（別表記） | A Case Study on How to Teach English at University Adopting TOEIC |
| フルテキストURL | 006_107_118.pdf |
| 著者 | 諸川 重剛| 神崎 謙一| 荻野 勝| |
| 抄録 | We tried an experiment to see whether or not it was possible to teach English considering the rising emphasis on TOEIC. Each of the three of us was in charge of five lessons out ot fifteen. One taught a section in listening in a language laboratory, another taught a section in grammer and vocabulary, the third taught a section in reading. There was no exam at the end of the semester, but mini-TOEIC tests were administered, and taking the TOEIC was mandatory. Students were evaluated on both their mini-tests and their TOEIC scores. Student evaluations reflected a positive attitude toward the course. Most students favored the standard of TOEIC as a test of course evaluation. Although we realize there are aspects to be improved (i.e., students' listening ability, class-time efficiency), we should continue to develop English ability focusing on the internationally established medium, TOEIC. |
| キーワード | TESOL at university teaching English adopting TOEIC team teaching experimental program |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 107 |
| 終了ページ | 118 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313643 |
| 著者 | 嶋村 浩一| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| 著者 | 辻 耕造| |
|---|---|
| 発行日 | 2007-03-23 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| JaLCDOI | 10.18926/fest/11543 |
|---|---|
| タイトル（別表記） | Fertilizer Microencapsulated with Biodegradable Polymer |
| フルテキストURL | 007_127_131.pdf |
| 著者 | 二木 栄| 吉澤 秀和| 松尾 充記| 楠本 昌彦| 北村 吉朗| |
| 抄録 | Many fertilizers are soluble in water, therefore their effect does not last for long time after fertilizing in soils. The nitrogenous fertilizers such as urea transported to groundwater cause serious agricultural contamination and health problems. To solve these problems, sustained release of fertilizer has attracted much attention. In this study, we attempted to prepare polylactide microcapsules with fertilizer by phase separation technique, which was a method of microencapsulation. Polylactide (PLA) was used as a biodegradable polymer bacause the biodegradable polymer has no influence on the soil and the ecosystem. The effect of preparation conditions such as stirring time and fertilizer concentration on morphology of microcapsule and on cumulative percentage released of enclosed urea was also investigated. |
| キーワード | fertilizer polylactide microcapsule controlled release phase separation |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 127 |
| 終了ページ | 131 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313894 |
| JaLCDOI | 10.18926/fest/11542 |
|---|---|
| タイトル（別表記） | Preparation and In Vitro Release Property of PLA Microspheres Enclosing Antitumor Agent |
| フルテキストURL | 006_103_106.pdf |
| 著者 | 西野 悟| 吉澤 秀和| 夏越 祥次| 愛甲 孝| 幡手 泰雄| 北村 吉朗| |
| 抄録 | Recently, many antitumor agents developed. Irinotecan hycrochloride (CPT) has a great side effect even though it is well effective against the cancer. Drug delivery system (DDS) medicine indicates that the release rate of medicine is constant for a long time. Therefore, in order to materialize the general idea of DDS, we applied microencapsulation technique to prepare biodegradable polymer microspheres (MS) enclosing antitumor drug having no side effect. Polylactide microparticles enclosing antitumor agent were prepared by solvent evaporation method under various operation conditions. The effects of operation parameter on release rate of drug and morphology of microparticles were studied. |
| キーワード | DDS microparticle polylactide antitumor agent solvent evaporation DSC |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 103 |
| 終了ページ | 106 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002314051 |
| JaLCDOI | 10.18926/fest/11541 |
|---|---|
| タイトル（別表記） | Upconversion property and light scattering in Tm(3+)-doped glass-ceramics |
| フルテキストURL | 007_119_125.pdf |
| 著者 | 三浦 嘉也| 丁 勇| 村田 隆| 姫井 裕助| 難波 徳郎| |
| 抄録 | Glass-ceramics containing Pb(x)Cd(1-x)F(2) microcrystallites were prepared through heat treatment of Tm(3+)/Yb(3+)doped SiO(2)-Al(2)O(3)-PbF(2) glasses. The crystallite size was controlled by varying the heat-treatment time. By changing glass composition, two types of strong optical scattering, Rayleigh and Mie scattering modes were observed for the glass ceramics. In the case of Rayleigh scattering, the scattering region expanded to the long-wavelength side with increasing the heat-treatment time. On the other hand, in the case of Mie scattering, the region were hardly dependent on wavelength, and visible light was widely scattered. It was argued that the different scattering phenomena were caused by the different size of the crystallites or their morphogical texture. Furthermore, the glass-ceramics with strong optical scattering showed higher upconversion fluorescence intensity than the matrix glass. The mechanisms for the enhanced upconversion due to the scattering were discussed. |
| キーワード | Optical scattering Glass-ceramics Oxyfluoride glass Microcrystallite Upconversion fluorescence |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 119 |
| 終了ページ | 125 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313480 |
| JaLCDOI | 10.18926/fest/11540 |
|---|---|
| タイトル（別表記） | Formation of Crosslinked Polyurea Membrane by Phase Separation Method |
| フルテキストURL | 006_099_102.pdf |
| 著者 | 小林 栄次| 吉澤 秀和| Jacobson Joseph| 北村 吉朗| |
| 抄録 | This research was conducted to clarify the membrane formation mechanism of crosslinked polyurea microcapsules by phase separation method, specially the role of polymeric surfactant of poly(ethylene-alt-maleic anhydride),(poly(E-MA))at the interface of O/W emulsion. Because of its toxicity, alternative chemicals should be chosen. This understanding may make possible to find the alternative chemicals. It was found that poly(E-MA)was necessary for the formation of crosslinked polyurea membrane. The addition of sodium dodecyl sulfate (SDS) prohibited the membrane formation reaction at the interface, even in the care of poly(E-MA) concentration enough for polymeric microcapsule formation. From the results in this study, poly(E-MA) as polymeric surfactant was found to be adsorbed on the interface of O/W emulsion and provide the reaction site for the membrane formation of polymeric microcapsules. |
| キーワード | microcapsulation O/W emulsion polyurea polymeric surfactant |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 99 |
| 終了ページ | 102 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313844 |
| JaLCDOI | 10.18926/fest/11539 |
|---|---|
| タイトル（別表記） | One-dimensional Compression Tests of Sludge Cake from Dredged Sludge |
| フルテキストURL | 006_085_097.pdf |
| 著者 | 脇谷 芳招| 藤井 弘章| 西村 伸一| 井上 隆司| |
| 抄録 | One-dimensional compression tests were performed to investigate compression characteristics of sludge cake used as a construction material. The sludge cake is dewatering product of dredged sludge from the bottom of a lake. The test results show following compression characteristics. (1) For the undisturbed samples, e-log p curves show compressibility of overconsolidated clay ordinatily observed. (2) For the disturbed samples, there observed compressibility close to that of ordinary normally consolidated clay. (3) For the recompressed samples, there observed two turning points on e-log p curve. The compression presures(p(c1) and p(c2)) at those points for the unsubmerged tests have a linear correlation with the recompression pressure(p(s)). The submerged tests give very small values of p(c1) and p(c2) compared with the case of unsubmerged test. (4) For the recompressed samples, the first compression index(C(c1)) after p(c) has a linear correlation with the initial void ratio(e(0)), and the second compression index(C(c2)) shows almost constant value. |
| キーワード | sludge cake one-dimensional compression test e～log p curve compression index void ratio |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 85 |
| 終了ページ | 97 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313853 |
| JaLCDOI | 10.18926/fest/11538 |
|---|---|
| タイトル（別表記） | Effects of ultrasonic treatment on the preparation of transparent glass-ceramic phosphor |
| フルテキストURL | 007_113_118.pdf |
| 著者 | 井上 輝英| 中島 瑞穂| 難波 徳郎| 三浦 嘉也| |
| 抄録 | The effects of ultrasonic surface treatment (UST) on the crystallization behavior and optical emission properties were investigated for the transparent glass-ceramics prepared from calcium aluminosilicate glasses co-doped with Eu(2+), Nd(3+). The glass-ceramics A were prepared by sintering a glass 45CaO・45Al(2)O(3)・10SiO(2) (mol%) containing 0.5Eu(2)O(3)+1Nd(2)O(3) under a 2% H(2)+98% Ar reducing atmosphere. In the glass-ceramics A, three crystalline phases, CaAl(2)O(4) (CA), CaAl(4)O(7) (CA2) and Ca(2)Al(2)SiO(7) (CAS) were commonly confirmed by X-ray diffraction. No drastic change in the amount of the precipitated crystalline phases was observed even in the case using UST of CA powders. It was suggested that the optical emission properties of the glass-ceramics A was responsible for the CA2 crystals. The glass-ceramics B were also prepared from a 51CaO・42Al(2)O(3)・7SiO(2) glass. The CA crystals were separately precipitated in the glass-ceramics B. In particular, a large amount of CA was successfully produced by stirring the UST suspension to prevent the sedimentation of the UST particles. The glass-ceramic B so-prepared showed strong photoluminescence but weak phosphorescence compared with other glass-ceramics B, indicating that the photoluminescence and phosphorescence were originated in different electron-trapping levels. The amount of the trap levels associated with the long lasting phosphorescence, such as oxygen vacancies, was probably small in the glass-ceramic B prepared with the stirring UST. |
| キーワード | ultrasonic surface treatment (UST) surface crystallization glass-ceramics long lasting phosphorescence calcium aluminosilicate glass |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 113 |
| 終了ページ | 118 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313433 |
| JaLCDOI | 10.18926/fest/11537 |
|---|---|
| タイトル（別表記） | Long-term Change Trend of Climate at Aomori City |
| フルテキストURL | 006_081_084.pdf |
| 著者 | 諸泉 利嗣| 佐藤 裕一| 佐藤 幸一| 三浦 健志| |
| 抄録 | Characteristics of long-term change for air temperature, precipitation and snowfall-depth at Aomori city were analyzed with data during the 111 years, from 1886 to 1996. The typical results were as follows: (1) The increasing rate of the annual mean air temperature was 1.07℃/111 year. (2) The increasing rate of the monthly minimum air temperature was larger than that of the monthly maximum air temperature. (3) The increasing rate of the monthly air temperature was large from winter to spring, however, was not so from summer to autumn. (4) The decreasing rate of annual precipitation was 0.187 mm/year. (5) The 5-year moving average of annual snowfall-depth might indicate the existence of about 10-year period. |
| キーワード | Air temperature precipitation snowfall-depth long-term change Aomori city |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2001-02-28 |
| 巻 | 6巻 |
| 号 | 1号 |
| 開始ページ | 81 |
| 終了ページ | 84 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313378 |