JaLCDOI 10.18926/fest/11482
FullText URL 011_093_097.pdf
Author Kimura, Kunio| Yamazaki, Shinichi| Cassidy Patrick E.| Fitch John W| Venumbaka Sreenu R.|
Abstract Fluorine-containing poly(ether ketone)s was synthesized by the nucleophilic aromatic substitution reaction of 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane and 4,4'-bis(2,3,4,5,6-pentafluorobenzoyl) diphenyl ether in super-critical CO(2). Polymerizations were carried out at 80℃ for 6 hours under 5000 psi of CO(2) pressure, which was super-critical phase. Polymerization concentration was 0.5 g of polymer in 10 - 12 mL of CO(2). The polymer was not obtained in CO(2) due to the insolubility of both the potassium bisphenoxide and the polymer into CO(2). However, the polymer was formed by an addition of DMAc and NMP in CO(2), even though molecular weight was not so high. Very small amount of co-solvents which were immiscible with CO(2) was effective, and it was 1/20 - 1/25 amount of the solvent used in the conventional poly(ether ketone) synthesis. The polymerization mechanism was also discussed.
Keywords super-critical carbon dioxide plastics high performance environmentally benign
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 93
End Page 97
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313564
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 英語
File Version publisher
NAID 120002314045
JaLCDOI 10.18926/fest/11445
Title Alternative Emulsification Properties of Poly(lactide-block-ethylene glycol-block-lacticide) Block Polymers
FullText URL 011_107_110.pdf
Author Matsumoto, Yasuo| Kitamura, Yoshiro| Yoshizawa, Hidekazu|
Abstract Homo-and copolymers of poly(lactic acid) have gathered much attention because of their biodegradability and biocompatibility. They have numerous applications in the biomedical field due to their potential. In their polymers, we are interested in poly(lactic acid)-poly(ethylene glycol) block polymers. The amphiphilic triblock copolymers, poly(DL-lactic acid)-poly(ethylene glycol)-poly(DL-lactic acid)(PLEL), have known to be surface-active ability. Therefore, we have studied emulsification properties with the polymers. PLEL were prepared by ring-opening copolymerization of DL-lactide and poly(ethylene glycol) catalyzed by stannous 2-ethylhexanoate. We prepared ethyl acetate-water-PLEL emulsion and applied this emulsion to biodegradable polymer scaffolds. PLA scaffolds were prepared by an emulsion freeze-drying method. These scaffolds were made by varying water weight fraction. Their surface pore size became larger with increasing water weight fraction.
Keywords Poly(lactic acid) Poly(ethylene glycol) Biodegradable polymer Tissue Engineering Surfactant
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 107
End Page 110
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002314040
JaLCDOI 10.18926/fest/11444
Title Alternative Synthesis of Novel Temperature-responsive Polymer Gel of Poly(aspartic acid)s
FullText URL 011_103_106.pdf
Author Uehara, Hiroki| Tanimoto, Fumiaki| Kitamura, Yoshiro| Yoshizawa, Hidekazu|
Abstract Recently, thermo-responsive polymer gels have been studied in various research fields such as drug delivery system. One of represetative thermo-responsive polymer gels is poly(N-isopropylacrylamide) gel (PNIPAAm) that has a rapid and reversible volume phase transition. However, PNIPAAm is not biodegradable, resulting in limitation of its use in medical fields. Novel thermo-responsive polymer gel was prepared by closslinking of isopropylamine modified poly(succinimide) (IPA-PSI) (Poly[α,β -(DL-aspartate isopropyl amide)-co-(succinimide)]) with hexamethylenediamine. Because of peptide bonds in backbone, therefore, it is expected to possess biodegradability and biocompatibility. These gels changed their volume in response to change of environment such as temperature, pH and concentration of salt in water. Crosslinkage density and substitution degree of IPA-PSI affected volume phase transition bahavior of the gel.
Keywords Thermo-responsive polymer gel Biodegradable polymer Poly(aspartic acid) Lower Critical Solution Temperature(LCST) Drug delivery system(DDS)
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 103
End Page 106
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313620
JaLCDOI 10.18926/fest/11442
FullText URL 011_099_101.pdf
Author Uddin Md. Azhar| Tanihara Manbu| Muto, Akinori| Sakata, Yusaku|
Abstract Liquid phase oxidation of benzene to phenol was carried out with O(2) using carbon-based Fe-Pd and Cu-Pd catalysts at 40℃. The carbon-based Fe-Pd and Cu-Pd catalyst were prepared by modified carbothermal reduction of metal ion exchange method using cation exchange resin as a source of carbon. Fe/carbon, Cu/carbon and Pd/carbon were not effective for the oxidation of benzene to phenol with O(2) when H(2) was used as a catalyst reducing agent, however both Fe/carbon and Cu/carbon catalysts revealed activities when ascorbic acid was used as a reducing agent. Bimetallic catalysts such as Fe-Pd/carbon and Cu-Pd/carbon showed much higher activity for phenol production than the monometallic catalysts even when H(2) was used a reducing agent. Catalytic activity of Fe-Pd catalyst was much (ca. 2.5 times) higher than the Cu-Pd/catalyst. A physical mixture of the single component catalysts such as Fe and Pd or Cu and Pd were not effective in the oxidation of benzene to phenol, suggesting that an intimate contact between Fe or Cu species with Pd species is necessary to formulate an active catalyst.
Keywords oxidation of benzene synthesis of phenol metal-carbon catalyst
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 99
End Page 101
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313983
JaLCDOI 10.18926/fest/11440
Title Alternative Measurement of thermal conductivity in the soils of Shirakami Mountains
FullText URL 011_089_092.pdf
Author Hanzawa, Wakako| Moroizumi, Toshitsugu| Sasaki, Choichi|
Abstract Thermal conductivity of soils in Shirakami Mountains that was registered on UNESCO's World Natural Heritage in 1993 were measured using a twin transient-state cylindrical-probe method. The typical results were as follows:(1) Thermal conductivity of the soils in Shirakami Mountains increased according to an increase of soil water content, which was the same tendency as the other soils. (2) The thermal conductivity of the soils was about 0.2~0.3 Wm(-1)K(-1) smaller than volcanic ash soils, and it showed the same tendency as leaf mold.
Keywords Shirakami Mountains Thermal conductivity Twin transient-state cylindrical-probe method Volumetric water content
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 89
End Page 92
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313628
JaLCDOI 10.18926/fest/11438
Title Alternative Characteristics of Dredged Sludges by Desiccation
FullText URL 011_083_088.pdf
Author Takisawa, Tomoaki| Nishimura, Shin-ichi| Murakami, Akira|
Abstract To examine the possible reuse of dredged sludge in view of construction material, physico-chemical properties and geotechnical characteristics of desiccated sludge are investigated through laboratory experiments. The consistency test, the pH test, the XRF test and the X-ray diffraction analysis are carried out for physico-chemical proteries, and the conolidation test and the permeability test are made for geotechnical characteristics. It is concluded that the history of desiccation changes the consistency of sludge and affects its permeability and consolidation bahavior.
Keywords Dredged sludges consolidation permeability solidification material XRF
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 83
End Page 88
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313636
JaLCDOI 10.18926/fest/11437
FullText URL 011_075_081.pdf
Author Dincsoy Enver Erdinc| Ichiminami, Fumikazu|
Abstract This study aims to examine the Southeastern Anatolia Project in Turkey, which contains irrigation, energy and drinking water development schemes. The project is the biggest regional development effort ever undertaken by Turkish Government and has influenced the sustainable economic and human development targets. With the completion of each step of the project, it has been expected that there have been many important economic and social changes in Turkish regions, especially the southeast part of Turkey (called as "Southeastern Anatolia Region") and its surrounding areas. The project also interests in both Turkey and its related regions and sustainability is a major issue of concern. Following a brief introduction of the project, the paper examines the type of recent social-economic changes in the region and Turkey in terms of sustainable development components. Under the light of our investigations from different perspectives, it is observed that GAP region with its development project is very far from expectations in the point of sustainability.
Keywords Sustainability Southeastern Anatolia Region GAP Regional Development GDP per capita Turkey
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 75
End Page 81
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313496
JaLCDOI 10.18926/fest/11435
FullText URL 011_065_074.pdf
Author Dincsoy Enver Erdinc| Ichiminami, Fumikazu|
Abstract Regional development and regional planning subjects are very closely linked with the development projects in Turkey as much as in the world. The main applications and studies are usually based on the elimination of disparities among regions. Within this framework, this study has firstly aimed to set out the regional development objectives in Turkey. Secondly, we tried to find out the effect of new regional approaches on Turkish regional structure. Hence, as an approach different from other studies, we focused on NUTS (Nomenclature of Territorial Units for Statistics) regions instead of geographical units (regions) studies. In the following parts of the study, thirdly, the efforts of Turkey about the regional development have been discussed and assessed by using Neoclassic Growth Model in terms of per capita income distributions for new region groups. To compare the results of analysis among regional units, the most important development projects for Turkey were also taken as a different approach unlike other sudies. Previous studies based on geographic regions showed that the basic tendency of per capita income distribution is 'Divergence' unlike expected 'Convergence' in Turkey, but in our study, we found more optimistic results for Turkey, in which per capita income distributions have a tendency to converge after 1997.
Keywords Regional Development Turkey NUTS Regional Development Projects Convergence
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 65
End Page 74
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002314049
JaLCDOI 10.18926/fest/11433
Title Alternative Measuring Method of Water Content for High compacted Bentonite Block by using Frequency Domain Reflectometry
FullText URL 011_057_064.pdf
Author Nishigaki, Makoto| Komatsu, Mitsuru| Chijimatsu, Masakazu|
Abstract In the high-level radioactive waste disposal project, in order to know the infiltration behavior, it have to be examined that the bentonite buffer material is used as a barrier, and the measuring device of moisture with the high accuracy is required. In this study it is discussed the usefulness for Frequency Domain Refrectometry (FDR) method through the measuring dielectric constant and making the calibration curve for the several kinds of bentonite material block (pure and silica sand mixing).
Keywords Measuring syatem Bentonite Volumetric mousture content Frequency domain reflectometry
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 57
End Page 64
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313913
JaLCDOI 10.18926/fest/11431
FullText URL 011_051_055.pdf
Author Nishigaki, Makoto| Komatsu, Mitsuru| Akudago John Apambilla| Shinshi Yoshihide| Kawakami Kenji| Kumamaru Koji|
Abstract A laboratory validation of a proposed new method of determining the in-situ effective porosity of unsaturated soils was carried out on unsaturated river sand. The proposed method consists of boring a small diameter hole into the soil and inserting an Amplitude Domain Reflectometry (ADR) probe at the bottom part of the hole. Water is supplied into the hole till saturation and later de-saturated. The water content with time is determined from the ADR probe voltage potential readings. The effective porosity is determined from the difference between the saturated and de-saturated water contents. However, in the laboratory, the water is supplied through the top and bottom parts of the sample. From the experiments the obtained effective porosity ranged from 0.28 to 0.29 for wetting from the top with an average of 0.287 and 0.29 to 0.30 for wetting from the bottom with an average of 0.293. The determined effective porosity ranged from 71.7-73.3% of the real initial porosity of 0.40 of the river sand. The maximum attained degree of saturation during the experiment was 91%. The results indicated that the method will be suitable and useful in determining the effective porosity of medium grained unsaturated soils.
Keywords Underground dam Effective porosity Storage capacity Freshwater development
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 51
End Page 55
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313335
JaLCDOI 10.18926/fest/11430
FullText URL 011_043_049.pdf
Author Saif Eldeen S. A.| Taniguchi, Takeo|
Abstract The simulation of mechanical bahavior of steel fiber reinforced concrete SFRC is introduced utilizing the homogenization method. The random distribution of fibers has been converted to a periodic distribution. Using the periodicity assumption, the boundary conditions for the unit cell are derived. The homogenized stiffness matrix is determined in elastic and plastic range. A numerical example to study the effect of the volume fraction of fibers is introduced.
Keywords fiber reinforced concrete composite materials homogenization periodicity finite element
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 43
End Page 49
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313548
JaLCDOI 10.18926/fest/11428
Title Alternative Socially Responsible Investment to Japanese Companies
FullText URL 011_031_041.pdf
Author Ikeda, Yousuke| Fueda, Kaoru|
Abstract Recently, Socially Responsible Investment, which is a policy of investment regarding with companies' social, environmental and moral value, attracts attention of investors. However, there are little data to explain the effectiveness of the SIR in Japan. In this paper we report the relation between environmental management and stock price of Japanese companies.
Keywords Socially Responsible Investment Environmental rating Eco fund
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 31
End Page 41
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313974
JaLCDOI 10.18926/fest/11427
Title Alternative Kernel density estimation on the interval
FullText URL 011_027_030.pdf
Author Ueki, Masao| Fueda, Kaoru|
Abstract In the field of data analysis, including environmental data, it is important to know the shape of underlying density function. In this case, we often use histogram which provides an information about the board line of density's curve. However histogram can not be the best method when the true density function is continuous, as is often the cases. On the other hand, kernel density estimator is another popular one which gives a continuous function. In some practical cases, however, there is a case that some knowledges about the range of the data are previously given. For instance, data of percentage, such as mortality rate, only takes the values on [0,1]. This paper considers two different modifications in kernel density estimator for the data on known interval and compares them.
Keywords kernel density estimator adaptive bandwidth data on finite interval
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 27
End Page 30
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313832
JaLCDOI 10.18926/fest/11426
Title Alternative Hydrodynamic and structural simulation by a particle approach
FullText URL 011_019_026.pdf
Author Morita, Toshimasa| Kajiwara, Tsuyoshi|
Abstract This paper is a research report concerning the hydrodynamic simulation and the structural simulation by a particle approach. The proposal particle method model is introduced in this report, and the calculation example by the calculation code which uses the proposal model is shown. The high possibility of the particle method is shown by calculation examples which is difficult to solve by FDM and FEM. It is shown by caliculation examples of both the hydrodynamic and the structure analysis problems that the proposal model enables us to treat the fluid and the structure in a unified way.
Keywords Particle Simulation Hydrodynamic analysis Structural analysis
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 19
End Page 26
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313653
JaLCDOI 10.18926/fest/11424
FullText URL 011_009_014.pdf
Author Nishina Tomohiko| Tian Tian Chen| Fujita Kazutoshi| Ishikawa, Hirofumi|
Abstract The red fox (Vulpes vulepes) and the vole ( Clethrionomys refocanus) are principal hosts of Echinococcus multilocularis in Hokkaido, Japan. How protoscoleces increases in voles and the level of immunity in foxes remain unknown because of the lack of survey data, so that it is important to clarify these mecahnisms in order to develop control strategies against E. multilocularis. In this study, the growth of protoscoleces in the infected voles was approximated as the logistic curve, the level of immunity in the fox was assumed to depend on the experience of the infection with E. multilocularis, and the worm burden in the fox was assumed to be governed by the amount of protoscoleces in the vole. Our model showed that the population densities of the hosts and the level of immunity influenced the prevalence of the E. multilocularis.
Keywords Echinococcus multilocularis protoscoleces immunity worm burden stochastic model
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 9
End Page 14
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002314034
JaLCDOI 10.18926/fest/11422
FullText URL 011_001_007.pdf
Author Fujita Kazutoshi| Tian Tian Chen| Nishina Tomohiko| Ishikawa, Hirofumi|
Abstract Plasmodium vivax re-emerged in 1993 near the demilitarized zone (DMZ) in South Korea, although P. vivax malaria disappeared in South Korea in 1979. The re-emergence of malaria in South Korea is believed to have originated from infection by mosquitoes from North Korea across the DMZ. The principal vector of P. vivax in the Korean Peninsula is Anopheles sinensis. The density of An. sinensis has a peak during the second week of July. The North Korean strain of P. vivax has 2 characteristics: a wide distribution of the terms of relapse and a high rate of relapse. Therefore, we may well wonder why the incidence of malaria is concentrated in summer, especially in August. Mathematical models in North Korea and South Korea were constructed in which the South Korean model was affected unidirectionally by the North Korean model. We carried out simulations of the model for the Paju-shi and Yonchon-gun situations near the DMZ region. The simulation results followed the time-course of the re-emergence of P. vivax there, and revealed the mechanism of the elevation of the incidence of P. vivax in summer.
Keywords DMZ Korea model Plasmodium vivax re-emergence
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 1
End Page 7
ISSN 1341-9099
language 英語
File Version publisher
NAID 40007297549