result 940 件
| JaLCDOI | 10.18926/fest/11559 |
|---|---|
| FullText URL | 005_031_034.pdf |
| Author | Watanabe, Masaji| |
| Abstract | We study unsteady flow that models lake flow in Kojima Lake. We assume that a lake is connected to another area with gates, and that those gates are opened when the water level outside the gates is lower than the water level of the lake. We study unsteady flow due to the opening of the gates. We analyze the problem with the finite element method, and take detailed structures of the gates into account. |
| Keywords | unsteady flow lake flow finite element method |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2000-02-29 |
| Volume | volume5 |
| Issue | issue1 |
| Start Page | 31 |
| End Page | 34 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313848 |
| JaLCDOI | 10.18926/fest/11556 |
|---|---|
| FullText URL | 003_011_024.pdf |
| Author | Watanabe, Masaji| |
| Abstract | 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. |
| Keywords | coupled circuits Van der Pol's equation slow oscillations |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 1998-01-14 |
| Volume | volume3 |
| Issue | issue1 |
| Start Page | 11 |
| End Page | 24 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313697 |
| JaLCDOI | 10.18926/fest/11523 |
|---|---|
| FullText URL | 007_039_044.pdf |
| Author | Watanabe, Masaji| |
| Abstract | We present some results of a finite element analysis for an unsteady flow in Kojima Lake. We also present an experimental result. The global positioning system was utilized in the experiment in order to record the temporal and the spatial data of a float traveling with the driving force of the fluid resistance. The spatial and temporal data were recorded to examine their correspondence with analytical results. |
| Keywords | lake flow numerical simulation finite element method global positioning system |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2002-03-22 |
| Volume | volume7 |
| Issue | issue1 |
| Start Page | 39 |
| End Page | 44 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313386 |
| JaLCDOI | 10.18926/fest/11522 |
|---|---|
| FullText URL | 006_011_015.pdf |
| Author | Watanabe, Masaji| Kunisada, Shigeyuki| |
| Abstract | The global positioning system is utilized in lake flow analysis to facilitate experimental evaluation for numerical results of a lake flow simulation. In our lake flow experiment a float travels on the lake surface receiving the fluid resistance due to lake flow, while a global positioning system receiver keeps track of its position. A momentum equation is derived when the product of the float mass and its acceleration is set equal to the driving force. The temporal change in the position of the float can be simulated when numerical solutions of lake flow equations are given. A comparison of numerical results and experimental data leads to an evaluation of the numerical simulation of lake flow. |
| Keywords | lake flow numerical simulation GPS-float finite element method |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2001-02-28 |
| Volume | volume6 |
| Issue | issue1 |
| Start Page | 11 |
| End Page | 15 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313583 |
| JaLCDOI | 10.18926/fest/11497 |
|---|---|
| FullText URL | 008_023_026.pdf |
| Author | Watanabe, Masaji| Numaguchi Satoshi| |
| Abstract | The global positioning system (GPS) is utilized for analysis of flows in the water environment. A float equipped with a GPS unit is designed to drift on the surface of the water. Its driving force is the fluid resistance exerted on a pair of rectangular plates. While it travels over the surface, the GPS unit evaluates its position every second, and spatiotemporal data that specify its motion are transmitted to be recorded. Results of experiments conducted to study unsteady flows generated in Kojima Lake are introduced. |
| Keywords | water environment global positioning system |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2003-03 |
| Volume | volume8 |
| Issue | issue1 |
| Start Page | 23 |
| End Page | 26 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313912 |
| JaLCDOI | 10.18926/fest/11484 |
|---|---|
| FullText URL | 010_023_028.pdf |
| Author | Watanabe, Masaji| Liu Ying| Wang Ming Jun| |
| Abstract | Topographical data of Kojima Lake have been updated by applying data obtained after dredging. Together with tide level of Kojima Bay and water levels of Kurashiki River and Sasagase river, the information was incorporated in computational analysis of unsteady flows generated in the lake when the water was discharged from Kojima Lake to Kojima, Bay. A finite element method was applied to equations governing unsteady flows, and the transition of discharge was obtained. |
| Keywords | water environment finite element method numerical simulation |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2005-02-28 |
| Volume | volume10 |
| Issue | issue1 |
| Start Page | 23 |
| End Page | 28 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313649 |
| JaLCDOI | 10.18926/fest/11457 |
|---|---|
| Title Alternative | Study on Effects of the Density Current Generator by Experiment and Measurement |
| FullText URL | 009_059_064.pdf |
| Author | Watanabe, Masaji| Yamatogi, Toshio| |
| Abstract | The density current generator (Manufacturer: Nakashima Propeller Co., Ltd., Patent owner: Hitachi Metals, Ltd.) is designed to generate vertical circulation over a wide water area harnessing the density current effect. We present some experimental results that we obtained using a float equipped with a GPS unit to study water flows generated by a density current generator unit set in S-Reservoir in Okayama Prefecture. We also present some measured results concerning the water temperature around the unit. We discuss its effects observing the experimental results and the measured results. |
| Keywords | density current stratification water environment |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2004-02-27 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 59 |
| End Page | 64 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313754 |
| JaLCDOI | 10.18926/fest/11456 |
|---|---|
| FullText URL | 009_053_058.pdf |
| Author | Numaguchi Satoshi| Med Mahmoud Ould Med Lemine| Watanabe, Masaji| |
| Abstract | We study a wind-generated current in Kojima Lake. We introduce an experimantal result which was obtained using a float equipped with a GPS unit. We also present a result of numerical study in which a result from finite element analysis of flow is applied to the momentum equation of the float to simulate its motion. |
| Keywords | water environment global positioning system numerical simulation |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2004-02-27 |
| Volume | volume9 |
| Issue | issue1 |
| Start Page | 53 |
| End Page | 58 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313924 |
| JaLCDOI | 10.18926/fest/11452 |
|---|---|
| FullText URL | 011_015_018.pdf |
| Author | Watanabe, Masaji| Liu Ying| Wang Ming Jun| |
| Abstract | Numerical techniques to simulate tsunamis are described. Partial differential equations are reduced to a system of ordinary differential equations to which appropriate numerical solvers can be applied. The techniques are illustrated with an example in which tsunami due to an earthquake is simulated. |
| Keywords | tsunami finite elements numerical simulation |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2006-03-15 |
| Volume | volume11 |
| Issue | issue1 |
| Start Page | 15 |
| End Page | 18 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002314045 |
| JaLCDOI | 10.18926/fest/11421 |
|---|---|
| FullText URL | 012_001_006.pdf |
| Author | Watanabe, Masaji| Kawai, Fusako| |
| Abstract | A mathematical model for exogenous depolymerization with time dependent degradation rate is analyzed in order to study the biodegradation of polyethylene glycol. The weight distribution with respect to the molecular weight before and after cultivation of microorganisms were analyzed an inverse problem to determine the time dependent degradation rate. Numerical techniques to solve the inverse problem and to simulate the transition of the weight distribution are described. |
| Keywords | biodegradation polyethylene glycol mathematical model numerical simulation |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2007-03-15 |
| Volume | volume12 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 6 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313599 |
| JaLCDOI | 10.18926/bgeou/11169 |
|---|---|
| Title Alternative | The Changoof 15 Years of Physical Fitness and Motor Ability in a Kindergartener |
| FullText URL | 135_0071_0075.pdf |
| Author | Kajitani, Nobuyuki| Ogo, Ikuko| Kajitani, Midori| Watanabe, Masashi| Kaga, Masaru| |
| Abstract | 本研究では、岡山大学教育学部付属幼稚園が実施ししている体力・運動能力テストから、1992年、2006年およびその中間年にあたる1999年のデータを用いて15年間の推移を明らかにすることを目的とした。幼児の体力・運動能力について、加齢の影響や性差が確認できた。また、体力・運動能力に個人差が大きいことが幼児期の特徴とされるが、体力の構成要素による差異が明らかとなった。多くの測定項目で15年間における低下および不変が確認できた。幼稚園児の体力・運動能力が長期的に低い状況を維持していることは、小学生・中学生の体力・運動能力が低下傾向を続けているとする報告と年代的にも同じであった。これらのことから、子どもを取り巻く生活環境の変化による運動経験や活動量の減少は、幼児期からの幅広い年代における体力・運動能力の低下に影響を及ぼすと考えられた。 |
| Keywords | 幼児 発達 体力 運動能力 |
| Publication Title | 岡山大学教育学部研究集録 |
| Published Date | 2007-06-25 |
| Volume | volume135 |
| Start Page | 71 |
| End Page | 75 |
| ISSN | 0471-4008 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313900 |
| Author | Takagi, Shigeaki| Watanabe, Masanori| Nakajima, Akiko| Kimura, Yoshinobu| |
|---|---|
| Published Date | 1998-02 |
| Publication Title | 岡山大学農学部学術報告 |
| Volume | volume87 |
| Issue | issue1 |
| Content Type | Departmental Bulletin Paper |
| Author | Watanabe, Atsuyuki| |
|---|---|
| Published Date | 2006-09-30 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | Watanabe, Takanori| |
|---|---|
| Published Date | 2006-06-30 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | Watanabe, Yoshinari| |
|---|---|
| Published Date | 2005 |
| Publication Title | 文化共生学研究 |
| Volume | volume3 |
| Issue | issue1 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/8979 |
| Author | 渡邊 佳成| |
|---|---|
| Published Date | 2003 |
| Publication Title | 文化共生学研究 |
| Volume | volume1 |
| Issue | issue1 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/8878 |
| Author | Watanabe, Sonoko| |
|---|---|
| Published Date | 2004-03-25 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | Watanabe, Ken| |
|---|---|
| Published Date | 2004-03-25 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | Watanabe, Tetsushi| |
|---|---|
| Published Date | 2004-09-30 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
| Author | Watanabe, Kiyoko| |
|---|---|
| Published Date | 2005-06-30 |
| Publication Title | |
| Content Type | Thesis or Dissertation |
