JaLCDOI 10.18926/fest/11485
FullText URL 010_029_039.pdf
Author Ju Xian Meng|
Abstract The generalized Grothendieck-Witt ring of nonsingular Hermitian forms with positioning map is the cartesian product of the ordinary Grothendieck-Witt ring of nonsingular Hermitian forms and a map ring. We study the generalized Grothendieck-Witt ring by computing the map ring.
Keywords Grothendieck Witt ring orbit GAP
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 29
End Page 39
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313655
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 英語
File Version publisher
NAID 120002313649
JaLCDOI 10.18926/fest/11478
FullText URL 009_163_166.pdf
Author Nakatsu Shogo| Tsuboi, Sadao|
Abstract Diels-Alder reactions of 5,5,5-trichloro-3-penten-2-one and ethyl 4,4,4-trichloro-2-butenoate with cyclopentadiene in the presence of a chiral Lewis acid gave exo-2-acetyl-endo-3-trichloromethyl-bicyclo[2.2.1]hept-5-ene and exo-2-ethoxycarbonyl-endo-3-trichloromethylbicyclo[2.2.1]hept-5-ene with 40% and 7% e.e., respectively.
Keywords asymmetric reaction Diels-Alder reaction asymmetric Diels-Alder reaction chiral Lewis acid trichloromethy group
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 163
End Page 166
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313377
JaLCDOI 10.18926/fest/11476
Title Alternative Evaluation of Surface State of Ceramic Particles Suspended in Aqueous Solution by Potentiometric Titration Method
FullText URL 009_153_162.pdf
Author Miura, Yoshinari| Nanba, Tokuro| Shinoda, Masakatsu|
Abstract Surface states of ceramic particles such as SiO(2), Al(2)O(3), Si(3)N(4) and so on suspended in aqueous alkaline solutions were successfully and easily determined by a potentiometric titration method. Isoelctric point, iep and excess surface charge density were classified and evaluated for many ceramic particles from the view points of aggregation and dispersion of particles and solubility in aqueous solution.
Keywords potentiometric titration method isoelctric point excess surface charge density ceramic particle suspension aqueous solution
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 153
End Page 162
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313753
JaLCDOI 10.18926/fest/11472
Title Alternative Chemical Changes of Dredged Soil in Kojima Lake from the Viewpoint of Soil Reaction
FullText URL 009_137_140.pdf
Author Takemura, Koichiro| Adachi, Tadashi|
Abstract While dredged soil is increasing, the processing problem isn't solved. So it is expected to use effectively as the soil material. Although, to use dredged soil, the chemical characteristic must be grasped. It is because acidification cause material (pyrite) can be contained in dredged soil. It causes sulfulic ions when it touches air and has the possibility to become acidification. In this experiment, dredged soil in Kojima Lake was made clear that it contained in pyrite and acidified under the oxidation condition. Accordingly, when using dredged soil as ground resources, it is necessary to use as the soil material such as filling-up reclamation under the deoxidization condition.
Keywords dredged soil pyrite acidify soil moisture condition
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 137
End Page 140
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313330
JaLCDOI 10.18926/fest/11471
FullText URL 012_151_156.pdf
Author Chetin Amine Cifci| Ichiminami, Fumikazu|
Abstract More than billions of years, Earth activity and earthquakes have functioned as the most important part in shaping the physical features of our Earth, on both social life and environment. Its unavoidable results always change life styles and city's structures with its positive and negative effects. To diminish those negative effects or avoid precise earthquake hazard, informing society is very crucial that the strong awareness decreases the risk as seen from past experiences all around the world. The research technique is functioned as questionnaire and applied in the area to achieve more realistic information and to maintain the essential arguments. All along the study, it is tried to think up the earthquake phenomena well known and straightforwardly recognized by a considerable quantity of people. Consequently, it is observed in this study that; firstly, telecommunication is most selected item both before and after earthquake in the point of its effectiveness. Secondly, telecommunication tools more preferable though, public announcement more trusting for society as power of affection on personal decision mechanisms. Thirdly, as a new tendency after earthquake, internet preference increased by means of information source about earthquake.
Keywords Awareness of earthquake Importance of information Relative reliability of sources Internet and public announcement
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 151
End Page 156
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313418
JaLCDOI 10.18926/fest/11470
Title Alternative Diversity of Agricultural Production and Its Change in Tottori Prefecture
FullText URL 009_121_135.pdf
Author Ichiminami, Fumikazu|
Abstract In this paper, diversity of agricultural production and its change was examined for some 45 years in Japan and for 1960, 1980, and 2000 in Tottori prefecture. The concept of entropy was used in order to measure the diversity of the agricultural production which consists of some sections. Agricultural production section in Japan has been diversified in the long run. The ratio of rice has been decreasing gradually for a policy of cutting back on the acreage under cultivation. Although the ratio of stock raising and fruits has increased, it tends in recent years to stagnate. The rate of vegetables has increased remarkably. Combination type for every municipalities was determined with the standard value A method, and complemented examination of agricultural diversity.
Keywords Agricultural Production Diversity Entropy Sustainability Tottori Prefecture
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 121
End Page 135
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313477
JaLCDOI 10.18926/fest/11468
FullText URL 009_111_116.pdf
Author Su Hai| Taniguchi, Takeo| Chouw Nawawi|
Abstract The study addresses the influence of bumpers as reduction measures at the bridge decks. The considered devices are steel spring, steel spring with additional viscous damper or steel spring with additional friction element. Gap between bridge decks remains. The reduction measure is placed at one end of the neighbouring girders. The considered earthquakes are the 1994 Northridge earthquake and the 1995 Kobe earthquake. For the nonlinear analysis a finite element method is used. The investigation shows that compared to the other measures the best reduction of the pounding force can be achieved with a friction device.
Keywords reduction measure earthquake response bridge girder pounding viscous damping friction
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 111
End Page 116
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313773
JaLCDOI 10.18926/fest/11467
Title Alternative Rows-of-houses Preservation in Maniwa City of Katsuyama Area, Okayama Prefecture
FullText URL 012_141_149.pdf
Author Luo, Yanjuan| Ichiminami, Fumikazu|
Abstract The aim of the study is to explain the present condition of the rows-of-houses preservation policy of Okayama Prefecture and to examine the samples in Maniwa city, Katsuyama area. Besides, the interview investigation was mainly conducted for residents in the rows-of-houses of preservation area in Katsuyama for giving the concluding remarks about the findings. The traditional private houses in Katsuyama preservation area were partially restored in the 1985-89 and 1993-97 fiscal years by the subsidy from the prefecture. Furthermore, Katsuyamacho at that time founded the subsidy system for maintaining rows-of-houses preservation area (about 25.3 ha) independently in 1993, restored 9 private houses, and made and updated the shop curtains; "Noren". In the point of the observable items, the ground warehouse of structures with gable tile-roofing is visible and it is also in use. Moreover, a latticed window structure, a white wall, and a sea cucumber wall constitute the charm of new rows-of-houses. A stone pavement follows on the riverside at the site facing the Asahi River. There are the remains of an arrival-and-departure place of a flat boat and a brewery, etc. According to our investigation in 2002, the residents were satisfied with "It is easy to live quietly", "the beauty of a natural landscape", "harmony of rows-of-houses and a shop curtain", and "a historical atmosphere", but the recognition of "the creation of active rows-of-houses" was unexpectedly low. Therefore, cooperation between residents and informational sharing are much more required. Consequently, since both the visitors and the residents are satisfied very much with each facilities, such as the whole rows-of-houses, a samurai residence, a brewery, and a restaurant etc., town planning is well organized and attained the priority targets.
Keywords Rows-of-houses Preservation Katsuyama area Visitors Residents
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 141
End Page 149
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313778
Author Sato, Sono| Kawahara, Hiroko| Hirata, Michiko|
Published Date 2008-02-25
Publication Title 岡山大学教育学部研究集録
Volume volume137
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/fest/11458
Title Alternative Numerical Simulation of a Flow Induced by a Pumping-up Facilities in a Lake
FullText URL 009_065_068.pdf
Author Suito, Hiroshi| Nouka, Masakatsu|
Abstract The purpose of this research is solving the flow in a lake which caused by a fan who rotates at the low speed set on the water surface for the purpose of water quality purification of a lake. Although it is shown clearly by various experiments that the water quality in a lake improved by operation of this kind of equipment, the mechanism of the flow was not fully understood. In this research simulation of the flow which was caused by this equipment was carried out numerically, and the aspect of the flow corresponding to various conditions or the form of a lake was investigated.
Keywords Fluid dynamics 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 65
End Page 68
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313524
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 日本語
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 英語
File Version publisher
NAID 120002313924
JaLCDOI 10.18926/fest/11453
FullText URL 009_037_044.pdf
Author Sung Jimin| Tanaka, Yutaka|
Abstract There have been proposed so far many methods of statistical diagnostics in Cox regression for checking the goodness of the estimated model or checking the adequacy of the data. The former type contains the checking of the overall goodness of fit, the validity of the assumption of proportional hazards and the proper functional forms of the effects of covariates. While the latter type contains the checking whether there exist singly and/or jointly influential observations in the data set. In the present paper we study numerically the performances of various methods of diagnostics including our method of influence analysis for multiple-case diagnostics (Sung and Tanaka, 2003) by analyzing a real data set of lung cancer patients.
Keywords Cox regression Influence function Local influence Influential Subsets Cox-Snell residuals Martingale residual Deviance residual
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 37
End Page 44
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313595
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/11451
FullText URL 009_027_036.pdf
Author Nakajima, Atsushi|
Abstract Let A/R be a ring extension and P a subset of Hom(A(R),A(R)). In his paper [5], K. Kishimoto introduced the notion of a P-Galois extension and gave several basic properties of these extensions. The author showed that these extensions are closely related to Hopf Galois extensions and the structure of quadratic or cubic P-Galois extensions over a field were given in [9] and [10]. Recently,the author classify commutative quartic P-Galois extensions over a field of characteristic not 2 in [11]. Continuing [11], we treat commutative quartic P-Galois extensions over a field of characteristic 2.
Keywords Cyclic extension P-Galois extension Hopf Galois extension
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 27
End Page 36
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313989
JaLCDOI 10.18926/fest/11448
FullText URL 009_009_017.pdf
Author Setiawan Agus| Tarumi, Tomoyuki|
Abstract Small Area Estimation (SAE) is the process of using statistical models to link survey outcome variables to a set of predictor variables known for small domains, in order to predict domain-level estimates. The need for detailed statistics on small area is constantly increasing. Small area estimation is becoming important in survey sampling due to a growing demand for reliable small area statistics from both public and private sectors. Bayesian hierarchical models provide a convenient framework for disease mapping and geographical correlation studies. Computation may be carried out using the freely-available WinBUGS software. Two approaches prediction to estimate total patient in small area i will be presented. For the purpose of this paper, the small area estimation in this context use data of Indnesia's population based on the 2000 census for the population of Jakarta and data of patient diarrhea from District Health Service of Jakarta. We interest to predict total patient of diarrhea as variable of interest and data population as auxiliary data from unsample for each small area.
Keywords Auxiliary data Population density Sample survey Small area estimation WinBUGS
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 9
End Page 17
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313784
JaLCDOI 10.18926/fest/11447
Title Alternative Development of the Mesh Data Analysis System
FullText URL 009_001_007.pdf
Author Niu, Donghui| Tarumi, Tomoyuki|
Abstract Area mesh statistics is a kind of small area statistics. The area mesh data of Japan can be created in a lot of way and many of them can be downloaded, for example, from the land's value information service which is provided by Ministry of Land, Infrastructure and Transport of Japan. We developed database of these area mesh data. By using mesh navigator software (Makita Naoki, 1997), which needs to run on ProAtlas2000 and Microsoft Access2000, we displayed the mesh data on the map. What visualized on the map is very convenient. For extending the advantages of area mesh data to spatial geographical statistics, we used PostgreSQL to develop a new database of mesh data. We also develop some programs in Delphi for the analysis of area mesh data, such as Histogram, Echelon analysis, and etc.
Keywords Area mesh data PostgreSQL PQCompo ProAtlas2000
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 1
End Page 7
ISSN 1341-9099
language 日本語
File Version publisher
NAID 120002313385
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