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JaLCDOI 10.18926/15388
FullText URL Mem_Fac_Eng_OU_27_1_11.pdf
Author Hirashima Masao| Inaba, Hideo|
Abstract To prevent freezing of road and aquaduct by extracting geothermal heat with two phase closed thermosiphon has been widely used in a cold area. Both heat transfer characteristics in the underground soil and function of the thermosiphon to extract geothermal heat have to be made clear for the purpose of the above system. This study is directed for the purpose to prevent freezing of fire hydrant and composed of the fundamental experiment and the empirical experiment. In the fundamental study, heat transfer behavior is studied experimentally in the small size filling bath representing the underground soil layer. After recording temperature distribution, heat transfer coefficient is measured, they are proceeded into the correlation between the dimensionless number of Nusselt, Rayleigh and Fourier. The fundamental study is described as the first report.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1992-11-25
Volume volume27
Issue issue1
Start Page 11
End Page 26
ISSN 0475-0071
language English
File Version publisher
NAID 120002307419
JaLCDOI 10.18926/15380
FullText URL Mem_Fac_Eng_OU_35_197.pdf
Author Nogami, Yasuyuki| Morikawa, Yoshitaka|
Abstract Modern communication engineerings, such as elliptic curve cryptographies, often requires algebra on finite extension field defined by modulus arithmetic with an irreducible polynomial. This paper provides a new method to detemine the minimal (irreducible) polynomial of a given proper element in finite extension field. In the conventional determination method, as we have to solve the simultaneous equations, the computation is very involved. In this paper, the well known "trace" is extended to higher degree traces. Using the new traces, we yield the coefficient formula of the desired minimal polynomial. The new method becomes very simple without solving the simultaneous equations, and about twice faster than the conventional method in computation speed.
Keywords finite field minimal polynomial irreducible polynomial higher degree trace trace cryptography
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-03-27
Volume volume35
Issue issue1-2
Start Page 197
End Page 205
ISSN 0475-0071
language English
File Version publisher
NAID 120002307992
JaLCDOI 10.18926/15377
FullText URL Mem_Fac_Eng_OU_30_1_47.pdf
Author Kagawa, Yukio| Sun Yonghao| Mahmood Zaheed|
Abstract Regular boundary element method is employed for the variational formulation of Helmholtz equation that governs the waveguiding problems. Like in the Charge simulation method, in this method, the source points associated with the fundamental solutions are allocated outside the domain so that the singular integrals which occur in the standard boundary element procedure can be avoided. First, the formulation is developed for the two-dimensional scalar Helmholtz problem solving for the axial components of either electric or magnetic fields. The application of the formulation is shown for simple hollow rectangular waveguide and dielectric-slab-loaded rectangular waveguide. Then the formulation is extended for the analysis of dielectric waveguides of open type incorporating axial components of both electric and magnetic fields, for the solution of the propagating modes which are generally of hybrid types. To show the validity and quality of the formulation, it is applied to a circular step-index optical waveguide and a dielectric rectangular waveguide. Very close agreements have been found when the solutions are compared with the ones obtained by different methods. One distinct merit of the extended formulation is that it has been fixed to suppress the spurious solutions which are encountered while solved by the conventional boundary element method.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1995-12-28
Volume volume30
Issue issue1
Start Page 47
End Page 62
ISSN 0475-0071
language English
File Version publisher
NAID 120002307187
JaLCDOI 10.18926/15367
FullText URL Mem_Fac_Eng_OU_30_1_9.pdf
Author Ding Ronggui| Osaki, Hirokazu|
Abstract Decision Support Systems (DSS) have been taken as hopeful support tools for decision making for more than 20 years. There are a lot of literatures on DSS, but most of them are not so practical as the designers expected. This paper points out the crux of this situation and argues that the research on DSS should pay some more attention to the decision making activities before the model using stage. A method named "Problem Situation Decomposing Graph (PSDG)" is presented in this paper for helping the decision maker(DM) elicit the decision making problems. A PSDG is an acycle AND/OR logical directed graph, and which includes all the factors affecting the problem situation based on the DM's knowledge. The logical nodes and parameter determining methods in PSDG can reflect the DM's decision making style. This paper introduces some basic concepts of PSDG, discusses some of its characteristics, and proposes a logical adjacency matrix for PSDG representation and analysis.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1995-12-28
Volume volume30
Issue issue1
Start Page 9
End Page 17
ISSN 0475-0071
language English
File Version publisher
NAID 120002307826
JaLCDOI 10.18926/15364
FullText URL Mem_Fac_Eng_OU_35_137.pdf
Author Sakiyama, Takaharu| Yoshimi, Tsuyoshi| Miyake, Akira| Umeoka, Midori| Tanaka, Atsushi| Ozaki, Sho| Nakanishi, Kazuhiro|
Abstract A monoacylglycerol lipase (MGL) was purified from Pseudomonas sp. LP7315 by ammonium sulfate precipitation, anion-exchange chromatography, and preparative electrophoresis. The purified enzyme was homogeneous on an SDS-polyacrylamide gel with a molecular mass of 59 kDa. Its hydrolytic activity was confirmed to be specific for monoglycerides: the enzyme did not hydrolyze diand triglycerides. MGL was found to be stable even after l-h incubation at 65℃. The hydrolytic activity depended not only on temperature and pH but also on the type of monoglyceride used. MGL also catalyzed monoglyceride synthesis at 65℃ in a solvent-free two-phase system, in which fatty acid droplets were dispersed in the glycerol phase with a low water content. The synthetic reaction proceeded at a constant rate for approximately 24 h and reached an equilibrium after 48 h of reaction. The initial rate of the synthetic reaction depended on several factors: the type of fatty acid used as the substrate, the amounts of fatty acid and glycerol, and the concentration of MGL in the glycerol phase. To analyze the effects of these factors, a kinetic model was developed based on the assumption that the adsorption equilibrium of MGL molecules at the interface between the two phases is the rate-determining factor for the synthetic reaction. The model was found to yield a good approximation of the initial synthetic rate under various reaction conditions. The analysis suggests that the adsorption behavior of MGL onto the interface had a large effect on the initial rate of the monoglyceride synthesis.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-03-27
Volume volume35
Issue issue1-2
Start Page 137
End Page 146
ISSN 0475-0071
language English
File Version publisher
NAID 120002307705
JaLCDOI 10.18926/15362
FullText URL Mem_Fac_Eng_OU_35_97.pdf
Author Yamasaki, Susumu| Kurose, Yoshinori|
Abstract In this paper, we formulate a new integrity constraint in correlation with 3-valued stable models in an abduction framework based on general logic programs. Under the constraint, not every ground atom or its negation is a logical consequence of the theory and an expected abductive explanation, but some atom may be unspecified as a logical consequence by an adjustment. As a reflection of the integrity constraint with an adjustment, we augment an adjusting derivation to Eshghi and Kowalski abductive proof procedure, in which such an unspecified atom can be dealt with.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-03-27
Volume volume35
Issue issue1-2
Start Page 97
End Page 135
ISSN 0475-0071
language English
File Version publisher
NAID 120002307812
JaLCDOI 10.18926/15361
FullText URL Mem_Fac_Eng_OU_35_77.pdf
Author Kishimoto Tokunari| Totsuji, Chieko| Tsuruta, Kenji| Totsuji, Hiroo|
Abstract In order to perform the large-scale molecular dynamics simulation of the Yukawa system, a mathematical expression for molecular dynamics using the fast multipole method is described. The model simulations are also performed to test the performance of our implementation of the FMM.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-03-27
Volume volume35
Issue issue1-2
Start Page 77
End Page 95
ISSN 0475-0071
language English
File Version publisher
NAID 120002307940
JaLCDOI 10.18926/15358
FullText URL Mem_Fac_Eng_OU_35_63.pdf
Author Shinomiya Shigeru| Totsuji, Chieko| Tsuruta, Kenji| Totsuji, Hiroo|
Abstract We present a theoretical study of Si(1-x)Ge(x) alloys based on tight-binding molecular dynamics (TBMD) calculations. First, we introduce a new set of nonorthogonal tight-binding parameters for silicon and germanium based on the previous work by Menon and Subbaswamy [Phys. Rev. B 55, 9231 (1997); J. Phys: Condens. Matter 10, 10991 (1998)]. We then apply the method to structural analyses of Si(1-x)Ge(x) alloys. The equilibrium volume and atomic structure for a given x are obtained by the TBMD method. We also calculate the bulk modulus B, elastic constants C(11), C(12) and C(44) as a function of x. The results show that the moduli vary monotonically, but nonlinearly, between the values of Si crystal and Ge crystal. The validity of the results is also discussed.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-03-27
Volume volume35
Issue issue1-2
Start Page 63
End Page 75
ISSN 0475-0071
language English
File Version publisher
NAID 120002307673
JaLCDOI 10.18926/15354
FullText URL Mem_Fac_Eng_OU_34_1.pdf
Author Song Baoyin| Inaba, Hideo| Horibe, Akihiko| Takahashi Takashi|
Abstract The experiment for investigating the falling snow melting characteristics of warm water flowing along sheet channels spread on a roof was performed in Tookamachi city, Nigata prefecture from February 6 to February 7, 1995. The sheet surface temperatures at 11 positions in 3 channels were measured. A physical model for a gas-water-snow system was constructed to compare the predicted results with the measured ones. A fully spread uniform water film in the sheet channel was observed in the experiments. The experimental results elucidated that it was feasible to use warm water flowing along sheet channels for melting falling snow on roofs. The temperature drop in the sheet channel mainly depended on the snowfall intensity, atmospheric temperature and wind speed. Under the influence of the roof edge, the temperature drop in the channel next to the side edge was much larger than that in middle channels. A water-snow two phase flow or a snow covered frozen water was experienced temporarily in the lower reaches of the water flowing channel. These suggest that a larger water flow rate is needed for the channel next to the roof edge, and a higher inlet temperature or a greater water flow rate is required for a severe weather condition. There was reasonably good agreement between the measured and predicted water temperatures.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2000-03-27
Volume volume34
Issue issue1-2
Start Page 1
End Page 12
ISSN 0475-0071
language English
File Version publisher
NAID 120002307686
JaLCDOI 10.18926/15346
FullText URL Mem_Fac_Eng_OU_35_9.pdf
Author Abe, Takeji| Tsuboi, Tomoaki|
Abstract The evaluation of microscopic inhomogeneity of polycrystalline aluminum is performed by measuring the hardness in respective grains. The recently developed ultra-micro hardness tester is used and the effects of the test pattern, the indentation load and the indenting velocity are examined. Then, the relationship between the increase in the hardness caused by the work hardening and the deformation of respective grains are statistically investigated. The hardness testing mode in which the initial load is applied before the onset of measurement gives more stable results than the testing mode without the initial load. The test condition with the indentation load of 9.8mN and the indentation velocity of 0.2 μm/sec seems to be optimum and gives the least dispersion of the measured values in grains. It is shown that the hardness values of respective grains in polycrystalline aluminum as well as their dispersion increase with the applied plastic strain. Discussion is made on the microscopic deformation behavior of polycrystalline aluminum.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-03-27
Volume volume35
Issue issue1-2
Start Page 9
End Page 19
ISSN 0475-0071
language English
File Version publisher
NAID 120002307825
JaLCDOI 10.18926/15345
Title Alternative 気管支喘息の発症における加齢の影響について
FullText URL 063_142_147.pdf
Author Mitsunobu, Fumihiro| Kitani, Hikaru| Okazaki, Morihiro| Mifune, Takashi| Tanizaki, Yoshiro|
Abstract Skin tests, serum total IgE levels, specific IgE antibodies against each allergen, bronchial reactions provoked by allergens and histamine release from basophils are well known as prameters of immediate allergic reactions. The incidence of positive immediate skin reaction to allergens such as house dust, ragweed, Aspergillus Alternaria, Cladosporium and Broncasma decreased with aging. On the other hand, the incidence of positive skin reaction to Candida albicans was higher in cases between the age of 41 and 50 and cases over the age of 61 compared to that in the other groups classified by age. Serum IgE levels was highest in cases aged between 0 and 30. The levels of serum IgE decreased with aging. The incidence of positive RAST scores (more than 2+) and positive bronchial reaction to house dust were highest in cases between 0 and 30, and decreased with aging. However, the positive ratio of these tests against C. albicans were highest in cases between 41 and 50. The degree of histamine release from basophils of asthmatics induced by anti-IgE was consistently high without any correlation to aging when their serum IgE levels were more than 501 IU/ml. In the cases with serum IgE levels of less than 300 IU/ml, basophil reactivity to anti-IgE decreasd with aging. Basophil reactivity to house dust was generally dependent on the levels of specific IgE antibodies against the allergen. Although basophil reactivity to C. albicans was also high in cases with positive RAST scores, some cases with a RAST score of 0+ or 1+ showed high or moderate basophil reactivity. Moderate or high reactivity of basophils was frequently observed in cases between 41 and 50 and cases over age 61.
Keywords Skin test (皮内反応) IgE Provocation test (吸入誘発試験) Basophil reactivity (好塩基球の反応性) Aging (加齢)
Publication Title 岡大三朝分院研究報告
Published Date 1992-06
Volume volume63
Start Page 142
End Page 147
ISSN 0913-3771
language English
File Version publisher
NAID 120002307130
JaLCDOI 10.18926/15344
FullText URL Mem_Fac_Eng_OU_35_1.pdf
Author Abe, Takeji| Hualin Song| Akagi Yasuo| Shimizu, Ichiro|
Abstract Free surface of polycrystalline metal becomes roughened after plastic deformation. The surface roughening is closely related to the inhomogeneity of polycrystalline metals, that is, to the inhomogeneous plastic deformation of respective grains. In the present study, inhomogeneous deformation on the free surface of polycrystalline aluminum specimen during uniaxial tension is studied. The inhomogeneous deformation of grains in the central area of the free surface of specimen is observed by the laser scanning microscope, while the inhomogeneous deformation perpendicular to the surface is studied by the laser scanning microscope as well as the stylus measuring instrument. It is shown that the surface roughness and the strain of respective grains increase with the applied strain. Discussions are made on the change in the surface roughness, the strain in each grain and the slip-line angles with the applied strain.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-03-27
Volume volume35
Issue issue1-2
Start Page 1
End Page 8
ISSN 0475-0071
language English
File Version publisher
NAID 120002307340
JaLCDOI 10.18926/15324
Title Alternative 臨床所見および検査成績からのスコアーによる喘息分類の特徴
FullText URL 063_063_068.pdf
Author Tanizaki, Yoshiro| Kitani, Hikaru| Okazaki, Morihiro| Mifune, Takashi| Mitsunobu, Fumihiro| Tanimizu, Masakuni| Honke, Naoko| Kusaura, Yasuhiro| Takatori, Akimasa| Okuda, Hiroyuki| Kimura, Ikuro|
Abstract Twenty six patients with bronchial asthma was classified by clinical symptoms and singns (clinical diagnosis), and the classification by clinical diagnosis was compared with the classification by a score calculated from clinical findings and examinations (score diagnosis). 1. Of 12 subjects with type Ia classified by clinical diagnosis, 8 cases with 0 to 49 ml/day of expectoration were evaluated as type Ia by score diagnosis. While four type Ia cases with 50 to 99ml/day of expectoration were calssified as type Ib by score diagnosis. The increased incidence of eosinophils in bronchoalveolar lavage fluid (BALF) of these four cases was similar to the incidence in type Ib cases with hypersecretion. 2. All of 6 subjects with type Ib by clinical diagnosis were estimated as type Ib by score diagnosis. 3. Of 8 cases with type II by clinical diagnosis, 7 cases were assessed as type II by score diagnosis. One case with type II by clinical diagnosis and with the score of 10 points was evaluated as questionable type II by score diagnosis.
Keywords asthma classification (喘息分類) bronchoconstriction (気管支攣縮) hypersecretion (過分泌) bronchiolar obstruction (細気管支閉塞) score diagnosis (スコアー診断)
Publication Title 岡大三朝分院研究報告
Published Date 1992-06
Volume volume63
Start Page 63
End Page 68
ISSN 0913-3771
language English
File Version publisher
NAID 120002307348
JaLCDOI 10.18926/15277
Title Alternative Model theory of doubly transitive groups
FullText URL 008_1_001_006.pdf
Author Tanaka, Katsumi|
Abstract 2重可移群には,near-domainを解釈することができ(定理13), またnear-domainから2重可移群を構成することができる。つまり,2重可移群の研究はnear-domainの研究と同値になる。ここで,有限のnear-domainがnear-fieldになることは知られているが,無限のnear-domainがnear-fieldになるかどうかは知られていない。これに関連して,無限の2重可移群についても多くの未解決問題が残されている。このノートでは,これらの問題にたいするモデル論的なアプローチ(Morley rank有限の場合の構造析,geometricな方法など)をいくつか紹介する。
Keywords 置換群 (permutation group) ω-安定 (ω-stable group) Morley rank 2重可移群 (doubly transitive group)
Publication Title 岡山大学医療技術短期大学部紀要
Published Date 1997-09-10
Volume volume8
Issue issue1
Start Page 1
End Page 6
ISSN 0917-4494
language Japanese
File Version publisher
NAID 120002307870
JaLCDOI 10.18926/15236
Title Alternative ラテンアメリカにおける肺吸虫の種類
FullText URL 012_1_001_005.pdf
Author Tongu, Yasumasa|
Abstract Six species of Paragonimus are presently known in Latin America. They include the following : P. mexicanus, P. peruvianus, P. amazonicus, P. inca, P. ecuadoriensis, and P. caliensis. Among them, P. peruvianus has been recognized as a synonym of P. mexicanus by Miyazaki himself, the discoverer of P. peruvianus. Furthermore, P. ecuadoriensis is suggestive of a synonym of P. mexicanus by Miyazaki. I also regard P. amazonicus, P. inca and P. caliensis as dependent species. I entertain a strong suspicion that these are synonymous with P. mexicanus. Therefore, P. mexicanus is the only species that distinctly inhabits Latin America. In the classification, in particular Paragonimus, we have to recognize the variations in the same species.
Keywords Paragonimus (肺吸虫) taxonomy (分類) Latin America (ラテンアメリカ)
Publication Title 岡山大学医学部保健学科紀要
Published Date 2001-12-25
Volume volume12
Issue issue1
Start Page 1
End Page 5
ISSN 1345-0948
language English
File Version publisher
NAID 120002308011
JaLCDOI 10.18926/15227
Title Alternative Suitability on the densitometry systematize in Laser Densitometer Model 1710 for Gafchromic MD-55-2 film
FullText URL 012_2_083_090.pdf
Author Aoyama, Hideki| Nakagiri, Yoshitada| Inoue, Mitsuhiro| Inamura, Keiji| Tahara, Seiji| Uno, Hirofumi| Morioka, Yasuki| Hiraki, Yoshio|
Abstract 医療の高度化に伴い,放射線治療分野においても急速な技術革新が行われている。QOL(Quality of Life)を考慮に入れた治療が求められる多くの場合,放射線治療が大きな選択肢の一つであることは言うまでもない。このような状況下の中で,正常組織に影響を与えず病巣に限局した放射線を照射する技術が開発され,外照射においては,欧米に習い我が国でも研究段階から臨床へ移り変わろうとしている。その際に,投与線量評価を欠かすことができないが,従来から使用されているいずれの線量計も新しい治療法に対応しきれていない。そこで,フィルムタイプ線量計, Gafchromic MD-55-2 film の開発により,いくつかの問題が解決されてきている。しかし,この線量計を精度良く測定する濃度測定器が必要になるが,現段階において規格化されたガイドラインが存在しないのが現状である。そこで本研究では,当施設で保有しているⅩ線フィルム線量測定用 Laser Densitometer Model 1710 を用いて Gafchromic MD-55-2 fllm による線量測定を行い,問題点の抽出を行うとともに線量測定精度の考察を行った。
Keywords Gafchromic MD-55-2 film Laser Densitometer Model 1710 濃度測定器制御ソフトウェア (Control software of densitometry system) 測定精度 (Accuracy of measurement)
Publication Title 岡山大学医学部保健学科紀要
Published Date 2002-03-20
Volume volume12
Issue issue2
Start Page 83
End Page 90
ISSN 1345-0948
language Japanese
File Version publisher
NAID 120002307935
Author 小林 青樹| 野崎 貴博|
Published Date 1998-03-20
Publication Title 岡山大学構内遺跡発掘調査報告
Volume volume14
Content Type Research Paper
JaLCDOI 10.18926/15164
FullText URL Mem_Fac_Eng_OU_35_41.pdf
Author Kuroboshi, Manabu| Tanaka, Muneaki| Kishimoto, Suguru| Goto, Kentaro| Tanaka, Hideo|
Abstract In 360 females, Bone mineral density (BMD) in lumbar vertebrae (L2-L4) was assessed by quantitative computed tomography (QCT), and the values obtained were compared with the frequency of vertebral transformation or fracture as assessed by lateral scan image (scanogram) by X-ray CT. A correlation was observed between the frequency of vertebral transformation (or fracture) and lumbar BMD values : BMD under 125 mg/cm(3) was observed over 90% of women with vertebral transformation, and BMD under 70mg/cm(3) was found about 50% of them. These results suggest that decrease in BMD in lumbar vertebrae leads to vertebral transformation or fracture. Thus, measurement of BMD by QCT would be very useful in predicting vertebral transformation or fractures.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2001-03-27
Volume volume35
Issue issue1-2
Start Page 41
End Page 46
ISSN 0475-0071
language English
File Version publisher
NAID 120002307948
JaLCDOI 10.18926/15153
Title Alternative Clinical feature of bronchial asthma in relation to patient age
FullText URL 065_048_054.pdf
Author Mifune, Takashi| Takata, Ichiro| Yokota, Satoshi| Kajimoto, Kazuhiro| Mitsunobu, Fumihiro| Kitani, Hikaru| Tanizaki, Yoshiro|
Abstract 高齢気管支喘息症例の病態を解明するために30才以降の気管支喘息症例について年齢層別に臨床的特徴を検討した。1)60才以上の高齢気管支喘息症例は全体の41.1%を占めており,年齢層別では50-59才,60-69才の症例が多く認められた。2)ほとんどの症例が成人発症喘息であり,高齢気管支喘息では92.3%が中高年発症型気管支喘息であった。3)加齢に伴って細気管支閉塞型気管支喘息の増加か認められた。4)血清IgE値は50-59才で再増加し,histamine release,LTC(4)産生は40149才で高値であった。5)40-69才の年齢層でステロイド依存性難治性喘息が多く認められた。以上高齢気管支喘息症例は中高年発症型喘息の病態の特徴を有しており,中高年発症型気管支喘息の病態の解明が必要と考えられた。
Keywords 高齢気管支喘息 (bronchial asthma in elderly) 中高年発症型喘息 (late onset asthma) 臨床病態 (clinical types of asthma) ステロイド依存性重症難治性喘息 (steroid dependent intractable asthma) ケミカルメディエーター (chemical mediator)
Publication Title 岡大三朝分院研究報告
Published Date 1994-09
Volume volume65
Start Page 48
End Page 54
ISSN 0918-7839
language Japanese
File Version publisher
NAID 120002307608
Author 横田 美香| 岩崎 志保|
Published Date 1997-12-20
Publication Title 岡山大学構内遺跡発掘調査報告
Volume volume13
Content Type Research Paper