result 26460 件
| JaLCDOI | 10.18926/fest/11598 |
|---|---|
| FullText URL | 002_025_032.pdf |
| Author | Nishigaki, Makoto| Schreck Martin| |
| Abstract | Engineers have long sought the possibility of measuring parameters such as temperature and pressure continuously in the underground with high precision, high spatial resolution and high band width of parameters. Distributed fibre optic measurement offers the use of a very fast, robust, precise, light and small gauges with an high spatial resolution. In this paper we would like to compile fibre-optic measure-methods which are available now for projects in geohydraulical engineering. This paper will propose new problems for future research work on parameter identification for such parameters as conductivity and anisotropy. |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 1997-01-10 |
| Volume | volume2 |
| Issue | issue1 |
| Start Page | 25 |
| End Page | 32 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313718 |
| JaLCDOI | 10.18926/fest/11597 |
|---|---|
| Title Alternative | Preparation of Monodispersed Hydrophilic Polymer Microspheres in Gel Permeation Chromatography |
| FullText URL | 005_159_163.pdf |
| Author | Yoshizawa, Hidekazu| Ikeda, Satoshi| Kitamura, Yoshiro| Hasegawa, Masadumi| Moriyama, Hiroyuki| Kawano, Yoshinobu| Hatate, Yasuo| |
| Abstract | Monodispersed porous polymer microspheres having diameter of ca. 50 μm were successfully prepared by suspension polymerization of styrene, polyoxyethylene methacrylate and ethylenegycol dimethacrylate. Monodispersed O/W emulsion was firstly made by SPG membrane emulsification technique, following droplets-swelling method of monodispersed seed emulsion by the addition of secondary emulsion. The effect of solvent used in suspension polymerization on porous structure of prepared polymer microspheres was investigated in this paper by identification with scanning electron microscopy, porosimeter and the performance in gel permeation chromatography. It was found that benzene, 1-butanol and butyl acetate worked as poor solvent for polymer prepared in this study and that polymer microspheres prepared with these solvents had larger pores. Gel permeation chromatography measurements indicates that polystyrene having molecular weight smaller than 50,000-100,000 can be clearly separated by using gel columns packed with polymer microspheres prepared with poor solvents. |
| Keywords | polymer microsphere monodispersed emulsion swelling method hydrophilic polymer gel permeation chromatography size-exclusive separation |
| 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 | 159 |
| End Page | 164 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313521 |
| JaLCDOI | 10.18926/fest/11596 |
|---|---|
| FullText URL | 002_019_024.pdf |
| Author | Watanabe, Masaji| |
| Abstract | We study a system obtained by coupling a nonlinear oscillator and a stationary system. We analyze the dynamics in a singular limit and show that asymptotically orbitally stable periodic solutions can exist. We also show how a slow oscillation can arise in the coupled system. |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 1997-01-10 |
| Volume | volume2 |
| Issue | issue1 |
| Start Page | 19 |
| End Page | 24 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313835 |
| JaLCDOI | 10.18926/fest/11595 |
|---|---|
| FullText URL | 002_009_017.pdf |
| Author | Ishikawa, Hirofumi| |
| Abstract | In this paper, we have calculated the elliptic singularities of the symmetric Hilbert modular group defined over a real quadratic number field. Applying those to the dimension formula, we tabulate the dimensions of the space of symmetric Hilbert modular forms of weight two satisfying certain cusp condition. |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 1997-01-10 |
| Volume | volume2 |
| Issue | issue1 |
| Start Page | 9 |
| End Page | 17 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313960 |
| JaLCDOI | 10.18926/fest/11594 |
|---|---|
| FullText URL | 005_153_158.pdf |
| Author | Ye, Xuan| Hayashi, Nobuyuki| Tsuboi, Sadao| |
| Abstract | This paper describes a novel synthesis of trienes by treatment of trans-2-alkenyl triphenylphosphonium bromides with BuLi in THF solution. Compounds, 5,7,9-tetradecatriene, 1,6-diphenyl-1,3,5-hexatriene, and 2,6,11,16-tetramethyl-2,6,8,10,14-hexadecapentaene were prepared in the yields of 40%, 9%, and 46%, respectively. Cross-coupling of trans-2-heptenyltriphenylphosphonium bromide and trans-3-phenyl-2-propenyltriphenylphosphonium bromide gave a mixture of 5,7,9-tetradecatriene (10.6%), 1,6-diphenyl-1,3,5-hexatriene (0.5%), and 1-phenyl-1,3,5-decatriene (9.4%). |
| 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 | 153 |
| End Page | 158 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313618 |
| JaLCDOI | 10.18926/fest/11593 |
|---|---|
| FullText URL | 002_001_008.pdf |
| Author | Hora, Akihito| |
| Abstract | An aspect of the cut-off phenomenon is reviewed. It is a sort of critical phenomenon observed in a wide variety of diffusion. We introduce a framework in which such a phenomenon can be understood and analyzed in a rigorous manner. We illustrate the mechanism with some concrete models. |
| Keywords | cut-off phenomenon critical time diffusion Markov chain on a graph symmetry |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 1997-01-10 |
| Volume | volume2 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 8 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313764 |
| JaLCDOI | 10.18926/fest/11591 |
|---|---|
| Title Alternative | Evaluation of Liquefaction Resistance by In-situ Testing and Its Application to Reliability Design |
| FullText URL | 005_145_151.pdf |
| Author | Nishimura, Shin-ichi| Shimizu, Hideyoshi| Fujii, Hiroaki| Shimada, Kiyoshi| |
| Abstract | A calculation method of probability of liquefaction is proposed in this paper. The spatial variability of soil parameters for the dynamic shear strength, i.e., N-values, median grain size, fines contents, and the statistical characteristics of the earthquake frequency are considered in the analysis. The standard penetration test (SPT) is convenient to estimate the spatial variability of the dynamic shear strength and mainly used in this study. Furthermore the determination of dynamic shear strength based on Swedish weight Sounding test also introduced here, because it is the simpler test than SPT. While the statistical model of the earthquake frequency is determined based on the record of historical earthquakes. Using this method the probability of liquefaction is calculated. The sand compaction pile method is considered for the ground improvement against the liquefaction. Finally, the relationship between the sand replacement rate and the probability of liquefaction is clarified. |
| Keywords | probability of liquefaction reliability design spatial variability of soil parameters statistical model of earthquake frequency dynamic shear strength |
| 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 | 145 |
| End Page | 151 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002314022 |
| JaLCDOI | 10.18926/fest/11581 |
|---|---|
| FullText URL | 005_113_119.pdf |
| Author | Xie Guanmo| Taniguchi, Takeo| Chouw Nawawi| |
| Abstract | Near source earthquakes can produce strong vertical ground motions with large amplitude and high frequency content. In this paper the axial ductility behavior of RC columns due to near source earthquakes is investigated. The column is simplified to a SDOF system that only describes vertical vibrations of a structural column. The gravity load effect is represented by a pre-load. An elasto-plastic model accounting for different stiffness and strength in tension and compression is used in the analysis. The ductility demand as well as pseudo acceleration spectra are evaluated. The investigation shows that strong vertical ground motions should be considered in seismic design. From the results of this investigation suggestions for a seismic design in case of near source earthquakes can be derived. |
| Keywords | RC columns ductility demand near source earthquakes strong vertical ground motions pseudo acceleration spectra |
| 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 | 113 |
| End Page | 119 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313363 |
| JaLCDOI | 10.18926/11579 |
|---|---|
| Title Alternative | 気管支喘息患者末梢血好塩基球の抗ヒトIgEおよびカルシウムイオノフォァA23187に対する反応性について |
| FullText URL | 061_016_022.pdf |
| Author | Tanizaki, Yoshiro| Sudo, Michiyasu| Kitani, Hikaru| Kawauchi, Kazuhisa| Mifune, Takashi| Okuda, Hiroyuki| Komagoe, Haruki| Tada, Shinya| Takahashi, Kiyoshi| Kimura, Ikuro| |
| Abstract | The release of histamine from basophils induced by anti-lgE and calcium ionophore A 23187 ( Cal) was examined in 27 patients with bronchial asthma and 7 healthy subjects, using a whole blood method. (1)The release of histamine induced by anti-IgE and CaI was significantly higher in atopic asthmatics than in non-atopic cases. (2) The histamine release with anti-lgE and CaI was significantly lower in cases with long-term steroid therapy compared to the release in cases without steroid therapy. (3) The release with anti-lgE and CaI was increased in cases with age of 0-39 years and in cases wpth age at onset of 0-39 years. (4) Anti-IgE induced release correlated to a certain extent with the release induced by CaI. These results show that basophil reactivity as expressed by histamine release changes under different conditions. |
| Keywords | Histamine release (ヒスタミン遊離) Basophils (好塩基球) Anti-lgE (抗ヒトIgE) Calcium ionophore A 23187 (カルシウムイオノフォァA23187) Bronchial asthma (気管支喘息) |
| Publication Title | 環境病態研報告 |
| Published Date | 1990-09 |
| Volume | volume61 |
| Start Page | 16 |
| End Page | 22 |
| ISSN | 0913-3771 |
| language | English |
| File Version | publisher |
| NAID | 120002313673 |
| JaLCDOI | 10.18926/fest/11578 |
|---|---|
| Title Alternative | Consideration for the correlation between basicity of oxide glasses and chemical shift of O1s binding energy in XPS |
| FullText URL | 003_145_156.pdf |
| Author | Nanba, Tokuro| Miura, Yoshinari| |
| Abstract | Binding energy of O1s core electron measured in XPS is a candidate to determine new scale of Lewis basicity of oxide ion in glass. Some mathematical expressions for the basicity or XPS chemical shift, such as charge parameter and optical basicity, are compared with experimental O1s binding energy in binary alkali oxide glasses. The expressions so far in use need some modification in parameters. A new empirical expression introduced in this paper gives new concept and universal scale of basicity. |
| 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 | 145 |
| End Page | 156 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313359 |
| JaLCDOI | 10.18926/fest/11577 |
|---|---|
| FullText URL | 005_107_112.pdf |
| Author | Tohari Adrin| Nishigaki, Makoto| Komatsu, Mitsuru| |
| Abstract | Failures of railway embankments in Japan usually occur during rainfall period due to the rise of water level in the embankments. Laboratory experiments were carried out to elucidate the initiation of failure of embankment under the rise of water level. The changes in pore-water pressure were monitored during the rise of water table and at the initiation of failures. The experiment results showed that main failure of embankment was initiated by development of localized unstable area at the toe of the embankment models during the rise of water level. This indicates that failure of embankments was a consequence of instability of the toe of the slope induced by saturation process under drained condition. |
| Keywords | embankment failure process seepage face toe failure overall instability |
| 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 | 107 |
| End Page | 112 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313411 |
| JaLCDOI | 10.18926/fest/11576 |
|---|---|
| Title Alternative | Dynamics of the Indian Automobile Industry: Recent Growth and Location |
| FullText URL | 003_135_144.pdf |
| Author | Tomozawa, Kazuo| |
| Abstract | In recent years, India has enjoyed economic prosperity that she had never experienced from the time on the independence. This article discusses dynamics of the automobile industry, one of the highest growth manufacturing sectors under the liberalization policy in the 1990s. After a brief historical explanation of the industry, the author describes corporate strategies of new comers, classified into three divisions; i.e. passenger car, commercial vehicle and two wheelers. Then he also analyze their distribution patterns from the view point of transport cost and Indian industrial location policy. The location of car assembly units in the 1990s tends to concentrate in greenfields on the outskirts of the existing agglomerations of the automobile industry. |
| Keywords | automobile industry liberalization industrial location India |
| 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 | 135 |
| End Page | 144 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002314042 |
| JaLCDOI | 10.18926/fest/11575 |
|---|---|
| FullText URL | 005_099_105.pdf |
| Author | Taniguchi, Takeo| |
| Abstract | Delaunay triangulation, a geometric subdivision of any convex domain, is often used as a finite element modeling method, but there are still several problems, which originally come from the characteristics of Delaunay triangulation. One problem appears when we remove some nodes which are already introduced for the triangulation. In this case we aim to obtain the triangulation without nodes by partial modification of the Delaunay triangulation with the node. Another problem occurs when tetrahedra with zero volume are generated by Delaunay triangulation. In this case they must be removed for the numerical analysis in order to guarantee the numerical stability and good numerical solutions. In this paper these two problems occuring at the use of Delaunay triangulation are theoretically discussed. |
| Keywords | Delaunay triangulation Degeneracy Tetrahedron Automatic mesh generation |
| 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 | 99 |
| End Page | 105 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313608 |
| JaLCDOI | 10.18926/fest/11574 |
|---|---|
| FullText URL | 003_127_134.pdf |
| Author | Shimada, Kiyoshi| |
| Abstract | This paper discusses the shear strength and volume change characteristics of a loose Fraser River sand. Suction-controlled simple shear tests were carried out for the unsaturated sand. Drained tests for the saturated sand were also carried out for the comparison with the unsaturated sand. The increase of the shear strength of the sand with the matric suction is very small and there is almost no increase of that over 20 kPa of the matric suction. The suppression effect of the matric suction on the volume change bahavior during shear is small, and the degree of dilation increases with the increase of the matric suction. |
| Keywords | unsaturated sand shear strength simple shear test matric suction volume change dilatancy |
| 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 | 127 |
| End Page | 134 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313902 |
| JaLCDOI | 10.18926/fest/11572 |
|---|---|
| Title Alternative | Comparison of micrometeorological environments inside and outside a watermelon plastic greenhouse |
| FullText URL | 003_121_126.pdf |
| Author | Morita, Noboru| Miura, Takeshi| |
| Abstract | The use of glass and plastic greenhouses have rapidly increased in recent years. Meteorological and soil moisture environments inside a greenhouse are significantly different from those in the open field. These differences should be understandable to establish accurate predictions of water consumption and evapotranspiraton inside a greenhouse which play impotrant roles in the design of any irrigation system. This study aims to estimate the micrometeorological conditions inside a watermelon plastic greenhouse which can be used for evapotranspiration calculations. Therefore, micrometeorological data were measured inside and outside the greenhouse for the comparison purposes. The results of this study may be summarized as : (1) Solar radiation inside the greenhouse was about 70% of that of outside it. (2) Net radiation during the daytime inside the greenhouse was almost the same as the absorbed total short-wave radiation. (3) The difference of air temperature inside and outside the greenhouse was very large during the daytime whereas not much difference was observed during the nighttime. (4) Both relative humidity and saturation deficit inside the greenhouse were higher than outside in case of highly vegetative land. (5) Wind speed inside the greenhouse was almost zero, while outside the average value was 1.8m/s. |
| Keywords | plastic greenhouse micrometeorology watermelon |
| 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 | 121 |
| End Page | 126 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002313884 |
| JaLCDOI | 10.18926/fest/11571 |
|---|---|
| FullText URL | 005_081_098.pdf |
| Author | Magda Waldemar| Maeno, Shiro| Nago, Hiroshi| |
| Abstract | A dynamic response of a submarine pipeline buried in sandy seabed sediments to water loading generated by harmonically oscillating water-table vertical movements is examined in the present report experimentally and numerically. The aim of small-scale laboratory experiments was: (1) to record time-histories of pipeline vertical displacements, and (2) to observe a shape of slip surface of an overburden sand body involved in breakout together with the pipeline. A parametric study was carried out in order to investigate the influence of two meaningful factors, that is the depth of burial and the specific gravity of pipeline, on a gradual upward displacement of the pipeline. Based on a numerical finite-element 2D-analysis of the hydrodynamic pore pressure and effective stresses oscillations in the pipeline vicinity, an analysis of the pipeline stability potential is presented, in which all the experimental cases tested are verified. All important component forces (e.g., hydrodynamic uplift force) associated with floatation phenomenon of the buried submarine pipeline are considered and quantified. |
| Keywords | submarine pipeline surface waves pore pressure floatation stability |
| 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 | 81 |
| End Page | 98 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313700 |
| JaLCDOI | 10.18926/fest/11570 |
|---|---|
| FullText URL | 003_105_120.pdf |
| Author | Kidtimonton Surasri| Mitsuno, Toru| |
| Abstract | Two optimization models are formulated based on different objectives for assisting the irrigation planner in making decision on agricultural planning during drought year. The sensitive degree of water shortage area in the irrigation project are classified by those models. They are solved by simplex method. Firstly, the Two-phase method is applied to analyze the artificial variables in the formulated model. Then, the formulated model is modified after getting rid of the artificial variables to obtain the feasible solution. The agricultural planning is planned by considering the classified area with social equity and economic improvement. Crop diversification is introduced to conduct in the very sensitive water shortage area and intermittent irrigation system is introduced to operate in the moderately sensitive water shortage area. The integrated farming system, the separation of land owner and cultivator and the disposition of substitute lots system are also suggested to conduct in this study project. |
| Keywords | agricultural planning Two-phase method integrated farming sensitive water shortage disposition of substitute lots system |
| 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 | 105 |
| End Page | 120 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313819 |
| JaLCDOI | 10.18926/fest/11569 |
|---|---|
| FullText URL | 005_071_079.pdf |
| Author | Jafar Ali Mohammad| Takeshita, Yuji| Fujii, Hiroaki| |
| Abstract | In-situ determination of fundamental hydraulic parameters like variably saturated hydraulic conductivity (K(FS)) and the matric flux potential (Φ(m)) provides a foundation from which several other unsaturated soil parameters can be estimated, namely the Alpha (α*) parameter. This Alpha parameter is the one of the components of 3D unsaturated flow in vadose zone and its value is the measure of the capillary component of unsaturated flow pattern. Here an in-situ technique, Pressure Infiltrometer is introduced to record the steady flow rate applying a constant positive head on an unsaturated soil surface. The aim of this paper is to check the shape factor of 3D flow geometry and to find out its sensitivity on other unsaturated hydraulic parameters and to find out the influence of Alpha parameters on the results of the in-situ estimation of field-saturated hydraulic conductivity. |
| Keywords | Field-saturated hydraulic conductivity Matric flux potential Alpha parameter Shape factor In-situ test |
| 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 | 71 |
| End Page | 79 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313869 |
| JaLCDOI | 10.18926/fest/11568 |
|---|---|
| FullText URL | 003_097_104.pdf |
| Author | Hassan Muhammad Qumrul| Okubo, Kenji| |
| Abstract | Surface air temperature distribution over the Ganges Delta Region of southwest Bangladesh and its tendency of warming are discussed through the analyses based upon the long-term temperature data from 1900-93. The data consist of two parts corresponding to the time-periods: 1973-93 and 1900-72. The study area is one of most affected places by the annual monsoon hydrological cycle and the present observation from these temperature data indicate that the surface air temperature gradient in the north-south direction is significant in the rainy season and that the temperature of the region is at an increasing tendency; the warming rate during the data periods (1900-93) on the long-term mean annual basis is estimated as 0.77℃ at Satkhira of the Khulna division and 0.29℃ as an areal average including the Barisal division, for the time difference of about half a century between the data periods before and after 1972. |
| 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 | 97 |
| End Page | 104 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313675 |
| JaLCDOI | 10.18926/fest/11567 |
|---|---|
| FullText URL | 003_075_095.pdf |
| Author | Magda Waldemar| Maeno, Shiro| Nago, Hiroshi| |
| Abstract | The response on sandy seabed sediments to a harmonically oscillating water-table, with a special consideration of the wave-induced pore-pressure oscillations around a pipeline buried in seabed sediments, is studied in the present work experimentally and numerically. The aim of the analysis was: (1) to observe a true distribution pattern of the wave-induced pore-pressure oscillations acting on the pipeline outer surface, and (2) to verify small-scale test results using numerical computations performed for a wide range of saturation conditions of seabed sediments, under the assumption of a compressible two-phase medium compound of the pore-fluid and soil skeleton, as well as a finite thickness of a permeable seabed layer. |
| 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 | 75 |
| End Page | 95 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313821 |
