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JaLCDOI 10.18926/fest/11566
FullText URL 005_057_069.pdf
Author Fujita, Ryousuke|
Abstract Let G be a finite group, Y a finite connected G-CW-complex, and let Ⅱ(Y) denote G-poset (in the sense of Oliver-Petrie) associated to Y. They defined the abelian group Ω(G,Ⅱ(Y)) consisting of all equivalent classes of Ⅱ(Y)-complexes. They also defined the subgroup Φ(G,Ⅱ(Y)) related to Ⅱ(Y)-resolutions. We call Φ(G,Ⅱ(Y)) the resolution module of Y. Applying the Oliver-Petrie theory to the universal covering space Y, we obtain the group Ω(G,Ⅱ(Y)), where G is a certain extension of G by π(1)(Y). Then the canonical homomorphism ν : Ω(G,Ⅱ(Y))→ Ω(G,Ⅱ(Y)) induced by the projection Y → Y is an isomorphism. In this paper, for G = Z(p)×Z(q) we construct a finite G-CW-complex Y such that π(1)(Y) Zq and ν(Φ(G,Ⅱ(Y)) ≠ Φ(G,Ⅱ(Y)), where p and q are arbitrary distinct primes.
Keywords G-CW-complex G-map G-poset
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 57
End Page 69
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313951
JaLCDOI 10.18926/fest/11537
Title Alternative Long-term Change Trend of Climate at Aomori City
FullText URL 006_081_084.pdf
Author Moroizumi, Toshitsugu| Sato, Yuichi| Sato, Koichi| Miura, Takeshi|
Abstract 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.
Keywords Air temperature precipitation snowfall-depth long-term change Aomori city
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 81
End Page 84
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313378
JaLCDOI 10.18926/fest/11532
FullText URL 007_091_098.pdf
Author Kamboh Maqsood Ahmed| Oki, Yoko| Adachi, Tadashi|
Abstract To evaluate hypoxic-salinity tolerance in wheat varieties, three Japanese varieties (Nourin-61, Chikugo Izumi and Shirasagi Komugi, relatively salt tolerant) and one Pakistani variety (Blue Silver, relatively salt sensitive) were grown under control, hypoxia, saline and hypoxic-saline conditions. The results suggested that relatively hypoxia and salt tolerant variety Nourin-61 was capable of producing the highest relative shoot yield under combined stress conditions. On the other hand, relatively sensitive variety to both hypoxia and salinity conditions, could not withstand harmful effects of combined stress. A more close correlation of plant growth characters between salinity and hypoxic-salinity than hypoxia and hypoxic-salinity indicated that varieties with higher salt tolerance would suffer less than varieties with higher hypoxia tolerance under combined stress conditions. And the balance of Na/K ratio in shoot tissues seems to be the major evaluation factor as the tolerant variety when salinity and hypoxia stress occur together.
Keywords hypoxia growth and ionic composition salinity salt tolerance wheat varieties
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 91
End Page 98
ISSN 1341-9099
language English
File Version publisher
NAID 120002313980
JaLCDOI 10.18926/fest/11528
Title Alternative Damage factors analysis for small embankment dams due to the Hyogoken-Nambu earthquake special to Hokudan Town
FullText URL 007_055_074.pdf
Author Fujii, Hiroaki| Kunimasa, Kana| Nanba, Akiyo| Yokomizo, Takayuki| Nishimura, Shin-ichi| Shimada, Kiyoshi| Hori, Toshio| Nishiyama, Tatsuro| Wakitani, Yoshiaki|
Abstract This study was performed to clarify which factors affected damage to take-ike (small embankment dams for irrigation in Japanese) of Hokudan Town on Awaji Island in western Japan due to Hyogoken-Nambu earthquake. Multivariate and ordinary statistical analysis were carried out using documentary data (181 damaged and 328 undamaged dams), and ordinary one was done for the results investigated in situ. The model for the multivariate analysis was created with 13 items and 94 categories for 4 groups (Location, Geology Structure, and History of Dam). As a result, the factors causing to damage for dam are (1) the nearest fault (Nojima, Mizukoshi and D2), (2) embankment volume (the larger the more), (3) angle of crest axis to epicenter (diagonal and normal), (4) distance to the nearest fault (less than 500 m), (5) distance to the epicenter (8 to 14 km which almost agree to the location of seismic intensity 7 JMA), (6) play view of dam axis (3 or 4 axes), (7) angle of crest axis to nearest fault (diagonal and normal), (8) elevation of dam site (over 100 m), (9) surface geology of dam site (non-cohesive soil), (10) era of construction (prior to 1891), and (11) soil properties of embankment (constructed of sand, smaller penetration resistance).
Keywords Earth dam earthquake damage site investigation statistical analysis case study
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 55
End Page 74
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002314039
JaLCDOI 10.18926/fest/11516
FullText URL 006_001_010.pdf
Author Tomita, Makoto| Otake, Masanori|
Abstract In many epidemiological and medical studies, a number of cancer motralities in catagorical classification may be considered as having Poisson distribution with person-years at risk depending upon time. The cancer mortalities have been evaluated by additive or multiplicative models with regard to background and excess risks based on several covariances such as sex, age at the time of bombings, time at exposure, or ionizing radiation, cigarette smoking habits, duration of smoking habits, etc. An interest herein to examine an additive, synergistic,or antagonistic relationship between radiation exposures and cigarette smoking habits for cancer mortalities. The results revealed a highly significant antagonistic influence for cancer mortalities from all nonhematologic findings, lung and respiratory system with negative interaction between radiation exposures and cigarette smoking amounts.
Keywords Excess relative risks cancer mortalities antagonistic effects prospective studies atomic bomb survivors
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 1
End Page 10
ISSN 1341-9099
language English
File Version publisher
NAID 120002313814
JaLCDOI 10.18926/fest/11508
FullText URL 010_111_117.pdf
Author Alam Ashraful| Takaguchi, Yutaka| Tsuboi, Sadao|
Abstract Synthesis of ellagic acid and its 4,4'-di-Ο-alkyl derivatives from gallic acid is described. Ellagic acid is prepared by oxidative coupling of gallic acid with ο-chloranil. Functionalized methyl bormogallate underwent Ullmann coupling to give the biphenyl that upon lactonization resulted in the ellagic acid and its alkoxy derivatives.
Keywords ellagic acid 4,4'-di-Ο-alkylellagic acid Ullmann coupling oxidative coupling
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 111
End Page 117
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313598
JaLCDOI 10.18926/fest/11506
FullText URL 010_105_109.pdf
Author Alam Ashraful| Takaguchi, Yutaka| Tsuboi, Sadao|
Abstract Ortho-monobromination of phenols and polyphenols by 1,3-dibromo-5,5-dimethylhydantoin (DBDMH) is described. A simple addition of commercially available DBDMH to phenols and polyphenols in chloroform at room temperature resulted in a good to excellent yield of corresponding ortho-monobromo derivatives.
Keywords ortho-monobromination phenol polyphenol DBDMH
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 105
End Page 109
ISSN 1341-9099
language English
File Version publisher
NAID 120002313473
JaLCDOI 10.18926/fest/11505
Title Alternative Illegally Parked Bicycles around the Okayama Station - Withdrawal, Storage and Return of Them -
FullText URL 010_089_103.pdf
Author Toyoki, Yosuke| Ichiminami, Fumikazu|
Abstract In this paper, first it is investigated illegally parked bicycles around the Okayama station, withdrawal, storage and return of them. Second, there will be a questionnaire to understand citizen's consciousness and clarify how they have been grasped present condition. Furthermore, it is aimed that considering how to carry out an efficient activity for reducing number of illegally parked bicycles. The results are concluded as follows. It is much more required to strengthening in the criminal prohibition zone by applying withdrawal activities and regulations. Presumably, first it is required to change storage area in order to increase the rate of returned bicycles. Besides, it will be great improvement in rate of return, if definite proportion of area is confidentially secured on storage area near the Okayama station. Moreover, it was remarkable that a citizen was not known in detail about an illegally parked bicycle. On the other side, recognition of most of the suburbanite of Okayama-shi tends to be impervious and replied to affirm illegally parked bicycle. However, the residents who live an area near to station understood the present condition well, and they disapprove to the illegally parked bicycle. Finally, in order to improve present condition, to prevent completely and to decrease the number of illegally parked bicycles publicity work is required.
Keywords Illegally Parked Bicycle Okayama Station Storage Area Publicity Work
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 89
End Page 103
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313985
JaLCDOI 10.18926/fest/11503
FullText URL 008_053_062.pdf
Author A.M., Dewan| Nishigaki, Makoto| Komatsu, Mitsuru|
Abstract Flood becomes regular feature in riverrine Bangladesh. Every year, around 21 percent of land is flooded during monsoon season, however, in severe situation this figure shot up to more than 60 percent of total land. This paper is an attempt to analyze hydrological characteristics of two catastrophic events (1988 and 1998 flood) in the light of flood history in Bangladesh. The analysis demonstrates that the 1998 flood was more severe than the 1988 one. Moreover, the 1998 flood was also prolonged than the 1988 flood due to heavy rainfall inside and outside of the country. Finally, flood management issues in Bangladesh have been analyzed and found that structural solution to mitigate flood is not the only solution. Based on the analysis some possible mitigation options are put foward.
Keywords Flood Flood Management Danger level Peak floods Deforestation
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 53
End Page 62
ISSN 1341-9099
language English
File Version publisher
NAID 120002313768
JaLCDOI 10.18926/fest/11502
FullText URL 010_083_088.pdf
Author Kankam-Yeboah Kwabena| Darko Philip K.| Nishigaki, Makoto|
Abstract Groundwater has been recognised as the most cost-effective option of safe water supply to rural communities in Ghana. The demand for potable water has led to the drilling of a large number of boreholes in many parts of the country. To establish the threshold of groundwater development from storage in a major river catchment (Pra River) in South-West Ghana, studies on recharge to the weathered aquifer and statistical evaluations of specific capacity and potential yield have been carried out. The SACSMA conceptual hydrological modelling system was used for the recharge estimate. With recharge rate of 50 mm/yr, the natural groundwater resources in the basin was estimated to support a maximum withdrawal of 12 l/s for a 10 hour per day pumping. The groundwater resources potential of 1.6 l/sk㎡ could be considered the threshold of groundwater exploitation in similar river basins in South-West Ghana. A study into the relation between permeability and recharge under different conditions and scenarios is required to define their limiting role in groundwater resources development.
Keywords Groundwater storage recharge aquifer specific capacity base flow hydrologic budget
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 83
End Page 88
ISSN 1341-9099
language English
File Version publisher
NAID 120002313829
JaLCDOI 10.18926/fest/11501
FullText URL 010_075_081.pdf
Author Kankam-Yeboah Kwabena| Asare Enoch B.| Gyau-Boakye, Philip| Nishigaki, Makoto|
Abstract The rapid impact assessment (RIAM), which was developed in Denmark, is a new tool for the execution of environmental impact assessments. RIAM is quite flexible, transparent and leaves a permanent record, which can be independently checked, validated or updated. RIAM has successfully been used to prioritize water resources management problems in Ghana in the order of which problems call for the most urgent attention. The priority list was easily validated and accepted to be the true reflection of the situation at a national workshop in which experts and representatives from water agencies, donor agencies, university faculties and departments, research institutes, private institutions and organizations including Non Governmental Organizations (NGOs) participated. The study has shown that RIAM, which can also be used in a developing country like Ghana, is a very useful tool in such prioritization process as has been applied in this exercise.
Keywords Water resources management problems prioritization impact indicators RIAM river basins Ghana
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 75
End Page 81
ISSN 1341-9099
language English
File Version publisher
NAID 120002313917
JaLCDOI 10.18926/fest/11499
FullText URL 010_067_074.pdf
Author Dewan Ashraf M.| Alam Md. Mahabubul| Nishigaki, Makoto|
Abstract The objective of this paper is to delineate flood prone areas and estimate damage in Greater Dhaka during the 1998 catastrophic flood using an integrated approach of GIS and remote sensing. Time series RADARSAT SAR data is acquired and used to demarcate flood boundaries for the 1998 flood event. This was accomplished by thresholding linear SAR imageries. Flood estimation demonstrated that flood areas steadily increased from early July 1998 and peaked on 25 August 1998 inundating 53% lands due to heavy monsoonal downpour and discharge from upstream points. Different thematic layers were combined with a derived flood map in order to assess flood damage for the same event. Flood damage analysis revealed that substantial damage has occurred in Greater Dhaka during the 1998 flood.
Keywords Synthetic Aperture Radar (SAR) flood delineation 1998 flood flood damage Greater Dhaka
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 67
End Page 74
ISSN 1341-9099
language English
File Version publisher
NAID 120002313624
JaLCDOI 10.18926/fest/11496
FullText URL 010_057_065.pdf
Author Dewan Ashraf M.| Alam Md. Mahabubul| Nishigaki, Makoto|
Abstract This paper is an attempt to develop a series of maps that precisely depict flood prone areas in Greater Dhaka, Bangladesh using remote sensing techniques. Multi-temporal RADARSAT SAR data were acquired and employed to delineate open water flood boundary during the floods of 1998 and 2000. Using a threshold algorithm, SAR data is segregated into water and non-water areas. The empirical threshold value was obtained by using visual interpretation technique, local knowledge of the study site and by deriving corresponding pixel values to land/water from each image. The result demonstrated that 53 percent of the study area was heavily inundated in 1998 flood which is the largest submerged area during a catastrophic scenario. In contrast, 35.32 percent area was flooded during the year 2000 which represents the area under water for a normal event. Using the reference data acquired from field visit, derived flood maps were further validated. Moderate accuracy is obtained for all flood maps, however, July 1998 image attained the highest overall accuracy (86%) in the dataset. The derived flood maps are expected to be useful to mitigate losses of lives and property from river water flooding in Greater Dhaka. Furthermore, this information would be worthwhile to develop an efficient flood disaster management system.
Keywords SAR open water flood 1998 and 2000 floods Greater Dhaka RADARSAT
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 57
End Page 65
ISSN 1341-9099
language English
File Version publisher
NAID 120002313953
Author So, Jun-ichi|
Published Date 2007-03-23
Publication Title
Content Type Thesis or Dissertation
JaLCDOI 10.18926/fest/11489
Title Alternative Considering variable selection criteria in correspondence analysis
FullText URL 010_049_056.pdf
Author Mori, Yuichi| Du, Xiao Dong| Iizuka, Masaya|
Abstract Ordinary goodness of fit criteria in correspondence analysis are considered as variable selection criteria in case correspondence analysis which is one of multivariate methods without external variables can be applied. The goodness of fit criteria focused here are proportion of cumulative eigenvalues, proportion of cumulative squared-eigenvalues and proportion of cumulative off-diagonal fitness. Each criterion is applied to a couple of real data sets and evaluated with interpretation of the selection process and result (selected subset of variables). Four selection procedures such as backward elimination and forward-backward selection are also performed to compare with each other as well as with all possible selection procedure. These results illustrate that the criteria can be used as selection criteria to select a subset of variables in correspondence analysis and to assess categorical items (questions) in a survey (questionnaire).
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 49
End Page 56
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313834
JaLCDOI 10.18926/fest/11486
Title Alternative Variable Selection Method using Apriori Algorithm on Contingency Table
FullText URL 010_041_047.pdf
Author Ohno, Manabu| Tarumi, Tomoyuki|
Abstract We proposed a new applied method for induction of variable selection on contingency table. This method is the application of Apriori algorithm on variable selection of contigency table with iteraction. We assume that variables are dichotomous variable. We confirm that can be select variable, when minimun support is low level by using AIC on variable selection criterion.
Keywords Apriori Algorithm Varable Selection Contigency Table Interaction
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 41
End Page 47
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313938
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 English
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 English
File Version publisher
NAID 120002313649
JaLCDOI 10.18926/fest/11483
Title Alternative On Persistence in Dynamical Systems (Review)
FullText URL 010_013_021.pdf
Author Sasaki, Toru| Kajiwara, Tsuyoshi|
Abstract Some important results on persistence are reviewed. These results concern the behavior of the orbits approaching the boundary. The orbits restrict the flow on the boundary, if one of them approaches more than one invariant set. A typical example is a model for cyclic competition, where the heteroclinic cycle can be the ω-limit set. Thus the persistence can be reduced to some conditions on the boundary flow.
Keywords persistence ordinary differential equation dynamical system
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 13
End Page 21
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313932
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 English
File Version publisher
NAID 120002313564