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JaLCDOI 10.18926/fest/11465
Title Alternative A Survey Study of Residential Awareness on Utilization Function of Agricultural Water and Its Maintenance --A case study in Niwase and Natsukawa of Okayama City, Okayama Prefecture
FullText URL 012_131_140.pdf
Author Makino, Tota| Matsuoka, Takanobu| Qi, Zhiyong| Shinabe, Yosihiro|
Abstract The agricultural water has manifold functions for farming at community level. However, along with the difficulties to maintain the agriculture water path that are caused by the decreasing of farmers and the aging of the society, the agricultural water is losing its functions even that as water resource for local community. This paper presents a survey of the residential awareness on regional water utilization to find the possibility for the maintenance of agricultural water path. Economic evaluation is tried for the regional warter utilization function. This study is carried out at a regional level that covers both farming households and non farmers. Following three points can be confirmed based on the results of questionnaire survey. Firstly, local citizens admit that the agricultural water does have some values (3,037 Yen per household per year). Secondly, the higher the environmental awareness is, and the longer the citizen has lived there, the higher evaluation to function of the agricultural water can be observed. Thirdly, even within those who is holding high evaluation to the agricultural water, it is thought to be quite difficult to maintain the agricultural water path due to the aging of the society and uneven distribution of the participants.
Keywords agricultural water manifold functions for farming at community level local citizens maintenance Contingent Valuation Method
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 131
End Page 140
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313592
JaLCDOI 10.18926/fest/11463
Title Alternative Heat Budget on Rice Field
FullText URL 009_081_085.pdf
Author Yang, Dongmei| Iwata, Toru| Miura, Takeshi| Ohtaki, Eiji|
Abstract Experience of flux measurements over tall canopies has revealed that the eddy flux of sensible plus latent heat is about 30% smaller than the available radiant energy flux. A systematic observation was carried out to investigate the imbalance problem on rice field. The rice field represents a complex system consisting of rice plant, irrigated water and soil. Date obtained in this experiment show that appreciable understimations of sensible and latent heat fluxes are not recognized but understimations of 15 to 23% are counted in the soil heat flux.
Keywords Heat budget Eddy correlation method Sensible heat flux Latent heat flux Soil heat flux
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 81
End Page 85
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313468
JaLCDOI 10.18926/fest/11462
Title Alternative Comparison of micrometeorological environments inside and outside an oriental pickling melon greenhouse.
FullText URL 012_125_130.pdf
Author Morimoto, Yuji| Hirano, Emi| Miura, Takeshi|
Abstract The use of greenhouses has rapidly increased after 1965, and the area became 11 times of 1965 as of 2001. Meteorological conditions 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 evapotranspiration inside a greenhouse which play important roles in the design of any irrigation system. This study aims to estimate the micrometeorological conditions inside an oriental pickling melon 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 decreased about 30% of that of outside it by plastic film and frame. (2) Net radiation during the daytime inside the greenhouse was almost the same as the absorbed total short-wave radiation. (3) The difference of daytime mean air temperature inside and outside the greenhouse was between 3 and 4 degree Celsius in day average. (4) Both relative humidity and saturation deficit inside the greenhouse were higher than outside, and those were affected by ventilation. (5) Wind speed inside the greenhouse was greatly affected by opening rate of the house side.
Keywords greenhouse micrometeorology oriental pickling melon
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 125
End Page 130
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313863
JaLCDOI 10.18926/fest/11461
Title Alternative The Study of Monin-Obukhov Similarity of Vertical Wind Velocity and Scalar Quantities in the Atmospheric Surface Layer
FullText URL 009_075_079.pdf
Author Ushikawa, Nozomi| Iwata, Toru| Ohtaki, Eiji|
Abstract Standard deviations for vertical wind velocity and scalar quantities, such as carbon dioxide,c, and water vapor,q, were analyzed on the basis of Monin-Obukhov similarity theory in the atmospheric surface layer. The correlation coefficient between scalar quantities c and q ,|R(cq)|, was derived from the similarity functions and can be expressed as the ratio of B(q)/B(c)(B(q)≤B(c)), where parameter B is the value of the normalized standard deviation of carbon dioxide and water vapor at neutral conditions.
Keywords Monin-Obukhov similarity theory Standard deviation Correlation coefficient Carbon dioxide Water vapor
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 75
End Page 79
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313729
JaLCDOI 10.18926/fest/11460
Title Alternative Measurement of root system with growth of oriental pickling melon.
FullText URL 012_119_123.pdf
Author Hirano, Emi| Morimoto, Yuji| Miura, Takeshi|
Abstract It is important to clarify how the soil moisture changes by irrigation and how moisture is consumed by absorption of root, to plan irrigation appropriately in upland field. And, it is thought that clarifying the growth of the root can be important information in the water management, because the amount and the pattern of root water uptake change depending on the growth stage. However, there are not too much a lot of researches that measure the root, in addition, the example intended for crops of 'Gourd family (scientific name:Cucurbitaceae)' is not found. Therefore, for oriental pickling melon, it measured how for the root system to grow up as crop grew every three weeks. The results of this study may be summarized as: 1) Root amount increased with the growth of crops, and the majority of the root existed to 20cm in depth. A lot of rootlets with the role of water uptake existed outside of from 10 to 20cm. 2) Root length has grown up in horizontal and vertical direction at a dash at the stage of growing initial. 3) It was able to be confirmed to the growth of the ground part and the root that the length and amount either also had implications. Moreover, root amount and plant caver ratio drew similar curve.
Keywords root growth oriental pickling melon
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 119
End Page 123
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313695
JaLCDOI 10.18926/fest/11459
Title Alternative CO(2) Fluxes Measured by Eddy Correlation and Aerodynamic Techniques
FullText URL 009_069_073.pdf
Author Inohara, Sachiko| Iwata, Toru| Ohtaki, Eiji|
Abstract To elucidate the seasonal and inter-annual variation of CO(2) exchanges between the atmosphere and cultivated field in Japan, the CO(2) flux has been measured by the eddy correlation technique at the experimental farm of Agricultural Faculty, Okayama University since December in 1998. The CO(2) sensor, however, does not work under rainy conditions. The improved aerodynamic technique was developed and used to cover CO(2) flux data which were not collected. This technique gives reasonable CO(2) fluxes even in rainy days. The reliability of the technique was also confirmed by comparing CO(2) fluxes with those measured by the eddy correlation technique using data in fine weather conditions.
Keywords CO(2) flux Eddy correlation technique Aerodynamic techniques Dimensionless profile
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 69
End Page 73
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313999
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 Japanese
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 Japanese
File Version publisher
NAID 120002313754
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 Japanese
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 Japanese
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 Japanese
File Version publisher
NAID 120002313620
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 Japanese
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 Japanese
File Version publisher
NAID 120002313636
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 Japanese
File Version publisher
NAID 120002313913
JaLCDOI 10.18926/fest/11429
Title Alternative Variable selection besed on global score estimation and its numerical investigation
FullText URL 012_029_040.pdf
Author Mori, Yuichi| Fueda, Kaoru| Iizuka, Masaya|
Abstract A variable selection method using global score estimation is proposed, which is applicable as a selection criterion in any multivariate method without external variables such as principal component analysis. This method selects a reasonable subset of variables so that the global scores, e.g. principal component scores, which are computed based on the selected variables, approximate the original global scores as well as possible in the context of the least squares. Three computational steps are proposed to estimate the scores according to how to satisfy the restriction that the estimated global scores are mutually uncorrelated. Three different examples are analyzed to demonstrate the performance and usefulness of the proposed method numerically, in which three steps are evaluated and the results obtained using four cost-saving selection procedures are compared.
Keywords principal components least square orthogonalization cost-saving selection
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 29
End Page 40
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313992
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 Japanese
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 Japanese
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 Japanese
File Version publisher
NAID 120002313653
JaLCDOI 10.18926/fest/11425
Title Alternative A mathematical model of Plasmodium falciparum transmission incorporating drug resistance: Simulations of the Solomon Islands situation
FullText URL 012_019_027.pdf
Author Chen, Tiantian| Nishina, Tomohiko| Hisakane, Naoto| Ishikawa, Hirofumi|
Abstract The Solomon Islands are known as a high endemic region of malaria. The resistance of Plasmodium falciparum to chloroquine has been confirmed since 1980 in the Solomon Islands, and the spread of chloroquine resistance is a big hurdle to malaria control. We have constructured the model for P. falciparum making allowance of chloroquine resistance. We distinguish the infection of resistance strains from that of sensitive strains in both the human and the vector populations. Since the overall parasite rate and the parasite rate of gametocytes for P. falciparum are strongly dependent on age, the human population is divided into 7 age groups in the model. The epidemiological parameters are determined by malariological survey in northeastern Guadalcanal (Ishii et al.) and the sporozoite rate in vector population is assumed as 0.1% based on the entomological study (Harada et al.) Our study aims at estimating the effect of mass drug administration under the presence of drug-resistance and also analyzing the escalation of drug-resistance through the transmission model for P. falciparum which can deal with chloroquine resistance.
Keywords Solomon Islands Plasmodium falciparum drug resistance model
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 19
End Page 27
ISSN 1341-9099
language Japanese
File Version publisher
NAID 120002313858
Author Oshiki, Toshiyuki|
Published Date 2007-09-12
Publication Title
Content Type Conference Paper