Author Kanzaki, Hiroshi| Abe, Yasuteru| Kawazu, Kazuyoshi|
Published Date 1998-02
Publication Title 岡山大学農学部学術報告
Volume volume87
Issue issue1
Content Type Departmental Bulletin Paper
Author Kasai, Mikio|
Published Date 1923-05-20
Publication Title Berichte des Ohara Instituts für landwirtschaftliche Forschungen
Volume volume2
Issue issue3
Content Type Departmental Bulletin Paper
Author Shiomi, Shinjiro| Nakamura, Reinosuke|
Published Date 1996-02-01
Publication Title 岡山大学農学部学術報告
Volume volume85
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/1155
FullText URL 12_0105_0124.pdf
Author 李 倢|
Abstract 都市内の人口密度分布は、都心からの距離に応じて逓減することが経験的に知られている。そして、都市内の人口密度分布を説明する関数形の大半も、人口密度が距離に関して常に一定割合で逓減する負の指数関数(Negative Exponential Fynction)モデルを基本的には仮定している。 しかし、経済発展にともなう都市化の過程では、既存都市への人口集中によって、都市の外延部の未開発地域が都市地域に組み込まれ、都市地域が連続的に拡大する郊外化現象が現れる一方、都市の郊外化にともなう都市部の人口流出が多く見られる。これは都心部における居住密度が低下する都心部の人口空洞化、いわゆる人口密度分布のドーナツ化現象である。 このような最近の都市の空間構造を考えると、伝統的でかつ単純な負の指数関数モデルでは人口密度分布を十分に説明できないことになる。そこで、本論文は、Anderson(1982,1985)によって人口密度分布の推定に適用された三次関数を基本とするCubic Spline関数を用いて、都市の空間構造を反映できるモデルの定式化を試みる。それによって、最近の都市空間における人口密度分布を精緻に描くことが期待できる。 Cubic Spline関数を用いて人口密度分布を推定する際に、Alperovich(1995)は、節点の位置と区間の数を決めるには一般的な基準がなく、外生的に決められているのがSpline関数の固有の限界であることと、推定されたモデルの係数のt-値と決定係数が極めて低いことを指摘している。本論文では、Cubic Spline関数の基本形を用いることによって、任意に決められた節点の位置と区間の限界を回避する方法を模索しながら、人口密度分布への応用を試みる。 これまでのCubic Spline関数を用いた実証研究では、研究対象が大都市圏となっている。それらの研究によると、大都市においては都心部の人口空洞化現象が明らかになっている。しかし、都心部の人口空洞化現象が大都市固有なものであるか、あるいは都市の発展にともなって発生する現象であるかを検討する必要がある。本論文は、地方中核都市である岡山市を事例として取り上げ、岡山市における常住人口密度の空間分布の分析によって、都市発展の形態を究明することを目的とする。 現実の都市においては、地質上の差異、方向別に開発進度が異なっていることがしばしば見られる。そのため、人口密度が都心を中心に同心円に分布しているのではなく、都心からの方向別によって、異なる形状を呈している。ここでは、北東、北西、南西、南東の4つの方向別に、それぞれ1970年と1995年の2時点でモデルを推定し、岡山市における25年間の空間構造の変化について考察する。それによって、都心部の人口空洞化現象(並び人口の郊外化現象)を明らかにし、方向別による開発パターンの違いを検証する。 最後では、都市の空間構造における人口密度分布と密度分布における変化の要因の分析について、研究方向および問題点を述べる。
Keywords Cubic Spline関数 人口空洞化現象 岡山市
Publication Title 岡山大学大学院文化科学研究科紀要
Published Date 2001-11
Volume volume12
Issue issue1
Start Page 105
End Page 124
language 日本語
File Version publisher
NAID 120002306118
JaLCDOI 10.18926/15612
FullText URL Mem_Sch_Eng_OU_3_89.pdf
Author Monobe Kazuo| Yamashita Yuhiko| Fujiwara Yasuo| Fujiwara Masahiko|
Abstract It was shown that the fibrous crystals of isotactic polybutene-l crystallized from solution under shearing stress are also composed of the central threads with an extended chain character and the epitaxally deposited lamellae with a folded chain character. The characteristic behaviors in this polymer exist in; (1) that the resulting crystals possess the hexagonal modification of form 1'; (2) that at low polymer concentrations the lamellar crystals with an orthorhombic modification of form Ⅲ are precipitated in similar fashion to the case in the absence of stirring; (3) that the morphology in surface replica of thick deposited film is very similar to that of melt extruded polyethylene film crystallized in a highly stressed state.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1968-09-01
Volume volume3
Issue issue1
Start Page 89
End Page 94
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307171
JaLCDOI 10.18926/15625
FullText URL Mem_Sch_Eng_OU_3_77.pdf
Author Monobe Kazuo| Yamashita Yuhiko| Fujiwara Yasuo| Fujiwara Yoshitaka|
Abstract We tried to clarify the crystallization mechanism of long chain polymers in solution under shearing stress using polyethylene. From the bright and dark field electron microscope observations and the electron diffraction study, we demonstrated that the resulting fibrous crystals consist of the central threads with an extended chain character and the lamellae with a folded chain character nucleated on the threads. The measurements of thermal and mechanical properties gave the additional confirmation for this suggestion. From these results we discussed the crystallization mechanism on the fibrous crystals.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1968-09-01
Volume volume3
Issue issue1
Start Page 77
End Page 83
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307234
JaLCDOI 10.18926/15611
FullText URL Mem_Sch_Eng_OU_3_85.pdf
Author Monobe Kazuo| Fujiwara Yasuo| Yamashita Yuhiko| Hironaka Kiyoshi|
Abstract Isotactic polypropylene was crystallized in the form of fibrous crystals from solution under shearing stress. The fibrous crystals consist of the oriented cluster of micro fibrils. From the electron microscopy and the electron diffraction study, it was found that the fine texture of this fibrous crystals is also the two component systems which are composed of the central threads with an extended chain character and the lamellae with a folded chain character deposited on the threads, as in polyethylene. Relatively larger lamellar structure than that of polyethylene was observed. The effect of crystallization conditions to the formation of the fibrous crystals from solution of isotactic polypropylene was described briefly. A characteristic melting behavior due to the melting of the central threads with an extended chain character was observed from the thermogram of differential scanning calorimeter.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1968-09-01
Volume volume3
Issue issue1
Start Page 85
End Page 88
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307605
JaLCDOI 10.18926/17822
FullText URL Mem_Fac_Eng_OU_43_1.pdf
Author Shimizu, Kenichi| Torii, Tashiyuki| Ishida, Koki|
Abstract Using a fatigue testing method by which fatigue cracks can be initiated and propagated in a film adhered to cover an elliptical through-hole in a base plate subjected to push-pull cyclic loads, annealed copper films with the thickness of 100μm and those reduced the thickness from the 100μm to 50μm by an electro-polishing were fatigued under a constant stress amplitude with a stress ratio of zero. The crystal rotation behavior with the fatigue crack propagation was investigated by measuring the crystal orientation around the fatigue crack initiated from the notch root before and after fatigue testing, using EBSD (Electron Back-scatter Diffraction) method. Then, the change of crystal orientation with fatigue testing was evaluated quantitatively from the misorientation between the crystal orientation matrix on the same point obtained before and after fatigue testing. As a result, the angle of the crystal rotation obtained from the region showing the high fatigue crack propagation rate was larger than that obtained from the region showing the low fatigue crack propagation rate for the film with the thickness of 100μm, while the fatigue crack propagated faster in the film with the thickness of 50μm than that with the thickness of 100μm regardless of the small crystal rotation angles with the fatigue testing for the film with the thickness of 50μm.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2009-01
Volume volume43
Start Page 1
End Page 7
ISSN 1349-6115
language 英語
File Version publisher
NAID 120002308710
JaLCDOI 10.18926/55797
FullText URL scs_017_095_104.pdf
Author Tanaka, Tomoko|
Publication Title Studies in Cultural Symbiotics
Published Date 2018-03-22
Volume volume17
Start Page 95
End Page 104
ISSN 1880-9162
language 英語
Copyright Holders Copyright © 2018 岡山大学大学院社会文化科学研究科
File Version publisher
NAID 120006416148
JaLCDOI 10.18926/fest/11635
FullText URL 001_169_179.pdf
Author Abenney-Mickson Stephen| Miura, Takeshi|
Abstract The SWAP93 model was used to predict how much capillary rise would occur in cropped fields. The experimental fields were located in a humid climate and it was thought that contribution from groundwater sources to total water use could be significant. In one field planted with soybean, the model predicted an average daily uptake of 1.3 mm; in another field planted with pumpkin, there was average daily uptake of 0.3 mm; and yet in a third field located in a vinyl house there was average daily uptake of 0.03 mm. These predictions represent about 38,7 and 1% contribution to total water use respectively. Even though there were no measured data to compare with, the results lie within the range of other works reported in the literature.
Keywords Crop water use capillary rise SWAP93 model groundwater
Publication Title 岡山大学環境理工学部研究報告
Published Date 1996-03
Volume volume1
Issue issue1
Start Page 169
End Page 179
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313364
Author Fast, Thomas| Prichard, Caleb| Morioka, Akemi| Rucynski, John|
Published Date 2014-12
Publication Title 大学教育研究紀要
Volume volume10
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/fest/11655
FullText URL 001_277_288.pdf
Author Tonomura, Naohiko|
Abstract This paper is an attempt to establish an objective criterion for civilizations, in order to treat them impartially and give them a fair assessment. First, theories up to the present about civilizations including those of Spengler and Toynbee are introduced. Second, the criterion presented by Bagby to distinguish major civilizations and peripheral civilizations are examined and proved to be subjective. Then the author proposes as an objective criterion for big civilizations just the pattern of succeeding four stages with the span of 400~500 years each. Big civilizations meeting this requirement which total eight or nine are divided into two types according to the difference of their nature. Lastly is shown how four puzzles of world history that have hitherto caused a lot of disputes (feudalism, absolute power of royalty, capitalism and modernization) can be solved through the recognition of these big civilizations.
Publication Title 岡山大学環境理工学部研究報告
Published Date 1996-03
Volume volume1
Issue issue1
Start Page 277
End Page 288
ISSN 1341-9099
language 英語
File Version publisher
NAID 120002313986
JaLCDOI 10.18926/15717
FullText URL Mem_Sch_Eng_OU_13_153.pdf
Author Fukui, Kiyoshi| Nogi, Shigeji| Yamada, Masuo| Sakakibara, Akira|
Abstract A unified treatment of injection and mutual phase locking phenomena in microwave oscillators coupled by a network characterized by a Y-matrix is presented. Under certain simplifying assumptions, steady state solutions such as locking frequency and oscillation phase relation are given with emphasis placed on the coupling-network dependence of locking bandwidth. Also, some examples of locking system specified by y(21)=0, Y(21)= Y(12) and y21= -Y12 are briefly discussed.
Publication Title Memoirs of the School of Engineering, Okayama University
Published Date 1979-03-05
Volume volume13
Start Page 153
End Page 162
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307532
Author Hori, Satoshi| Tanabe, Akira|
Published Date 1956
Publication Title 岡山大学農学部学術報告
Volume volume8
Issue issue1
Content Type Departmental Bulletin Paper
Author Tanizaki, Yoshiro| Mitsunobu, Fumihiro| Hosaki, Yasuhiro| Ashida, Kozo| Hamada, Masanori| Iwagaki, Naofumi| Fujii, Makoto| Takata, Shingo|
Published Date 2004-12-01
Publication Title 岡大三朝医療センター研究報告
Volume volume75
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/17853
FullText URL Mem_Fac_Eng_OU_43_113.pdf
Author Sakemi, Yumi| Kato, hidehiro| Nogami, Yasuyuki| Morikawa, Yoshikawa|
Abstract Barreto–Naehrig (BN) curve has been introduced as an efficient pairing-friendly elliptic curve over prime field F(p) whose embedding degree is 12. The characteristic and Frobenius trace are given as polynomials of integer variable X. The authors proposed an improvement of Miller's algorithm of twisted Ate pairing with BN curve by applying X of small hamming weight in ITC–CSCC2008; however, its cost evaluation has not been explicitly shown. This paper shows the detail of the cost evaluation.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 2009-01
Volume volume43
Start Page 113
End Page 116
ISSN 1349-6115
language 英語
File Version publisher
NAID 120002308945
JaLCDOI 10.18926/14934
Title Alternative 気管支喘息症例における皮質骨海綿化
FullText URL 070_053_060.pdf
Author Tsugeno, Hirofumi| Nakai, Mutsuro| Okamoto, Makoto| Harada, Seishi| Takata, Shingo| Mifune, Takashi| Mitsunobu, Fumihiro| Ashida, Kozo| Hosaki, Yasuhiro| Akiyama, Tsuneo| Tsuji, Takao| Tanizaki, Yoshiro|
Abstract In previous studies, we have demonstrated that chronic administration of systemic glucocorticoids decreases cortical bone mineral density (BMD), cortical bone volume, bone strength, and induces development of pathologic fractures in asthmatic patients. We have also demonstrated that glucocorticoid administration appears to be responsible for the process of cortical bone porosity at both endosteal and intracortical sites in postmenopausal asthmatic patients. There is a difference of gonadal hormones between male and female. To investigate the influence of hormonal difference on glucocorticoid-induced cortical bone porosity, we studied cortical bone volume and BMD in both male and female patients with asthma in this report. A total of 99 asthmatic patients (male 26 cases, female 73 cases) were enrolled in the study. Peripheral quantitative computed tomography (pQCT) was used to measure cortical BMD and relative cortical volume. The cortical volume-density relationship appeared to remain constant regardless of the level of systemic glucocorticoid administration, age or sex, suggesting cortical bone porosity causes similar and simultaneous decreases in cortical bone volume and density. In conclusion, glucocorticoid administration appears to be responsible for the process of cortical bone porosity at both endosteal and intracortical sites despite the gonadal hormonal differences.
Abstract Alternative 【目的】これまでに我々は,気管支喘息症例において経口ステロイドによる皮質骨骨密度,容積の減少が骨折に関与する新知見を報告し,閉経後女性では皮質骨骨密度一容積の減少はステロイド投与量にかかわらず一定であることを報告してきた。この皮質骨骨密度-容積の関係において性差による違いを検討するために,男性,女性患者の両方について検討を行った。【方法】対象はステロイド依存性喘息99例(男性26例,女性73例)。性別,年齢,経口ステロイド積算総投与量により6群に分類した。椎体圧迫骨折はⅩ線側面像にて評価 し,皮質骨容積比および皮質骨骨密度はpQCT(Stratec XCT960)を用いて測定した。それぞれの群の皮質骨骨密度-容積比の関係を算出し比較検定をおこなった。【結果】それぞれの群の皮質骨の骨密度と容積比は有意に相関した。それぞれの群の皮質骨骨密度-容積比の傾きは,いずれも有意差を認めなかった。【結論】気管支喘息症例におけるステロイド投与による皮質骨の骨密度と容積の減少は,性別にかかわらずほぼ一定で,皮質骨は内側と外側において同様に海綿化してゆくと考えられた。
Keywords bronchial asthma systemic glucocorticoid cortical bone cortical porosity peripheral quantitative computed tomography
Publication Title 岡大三朝分院研究報告
Published Date 1999-12
Volume volume70
Start Page 53
End Page 60
ISSN 0918-7839
language 英語
File Version publisher
NAID 120002308477
Author Djagra, Ida Bagus| Wada, Hiroshi|
Published Date 1980
Publication Title 岡山大学農学部学術報告
Volume volume56
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/14906
Title Alternative 気管支喘息患者における肺機能とHRCT上のlow attenuation areaに対する喫煙の影響
FullText URL 071_029_035.pdf
Author Mitsunobu, Fumihiro| Mifune, Takashi| Hosaki, Yasuhiro| Ashida, Kozo| Tsugeno, Hirofumi| Okamoto, Makoto| Takada, Shingo| Yokoi, Tadashi| Tanizaki, Yoshiro|
Abstract The influence of smoking on pulmonary function and emphysematous changes of the lung (percentage of attenuation area < -950 HU (% LAA) on high resolution computed tomography (HRCT) was examined in 49 patients with bronchial asthma. 1. In patients with asthma, the % residual volume (RV) in many nonsmokers was less than 129%, in contrast, the % RV in many smokers was between 130% and 189% , which was higher than that in nonsmokers. 2. Significant correlations between % RV and 96LAA value, and between % RV and CT number were observed both in nonsmokers and smokers with asthma, in which as % RV more increased, % LAA value was larger, and CT number was lower. 3. % DLco value was lower in smoking patients with asthma, whose % RV was between 130% and 189% and larger than 190% , however, the % DLco value did not change in nonsmoking patients despite of higher valure in % RV. 4. A significant correlation was also observed between % FEV1.0 value and % RV both in smoking and nonsmoking patients with asthma; as % RV value more increased, % FEV1.0 value was lower. 5. Any correlation between % FVC value and % RV was not observed. These results suggest that smoking affects the % LAA of the lung on HRCT and % DLco in patients with asthma.
Abstract Alternative 気管支喘息49例を対象に、肺機能およびHigh resolution computed tomography(HRCT)上のLow attenuation are (LAA) <-950HUで示される肺気腫様変化に及ぼす喫煙の影響について検討した。  1.気管支喘息患者のうち、非喫煙例では% 残気量(% RV)は多くの症例(65.6% )で129% 以下であったが、一方喫煙症例では130% から189% を示す症例が最も多く見られた(60.0% )。非喫煙例および喫煙例いずれにおいても、 2.% RVと% LAA、% RVとCT number 間に有意の相関が見られた: % RVが上昇するにつれて、% LAA値は増加し、CT numberは低下する傾向が見られた。  3.喫煙例では、% RVが130-189% あるいは190% 以上の症例で、% DLco値 が明かに低値を示す症例が見られたが、非喫煙症例では% RVが高い値を示しても% DLcoの低下はみられなかった。  4.喫煙例、非喫煙例いずれにおいても、% FEV1.0倍と% RV値の問には有意の相関が見られ、% RV値が上昇するにつれて、% FEV1.0値は低下する傾向が見られた。  5.% FVCと% RVの問には相関は見られなかった。以上の結果より、喫煙は気管支喘息患者のHRCT上の% LAAおよび% DLcoに影響を与えることが示唆された。
Keywords asthma smoking % LAA of the lungs FEV1.0 DLco
Publication Title 岡大三朝分院研究報告
Published Date 2001-02-01
Volume volume71
Start Page 29
End Page 35
ISSN 0918-7839
language 英語
File Version publisher
NAID 120002308294
JaLCDOI 10.18926/14975
Title Alternative 気管支喘息におけるHRCTによるLow attenuation area(LAA)と平均CT numberとの関連
FullText URL 068_015_021.pdf
Author Mitsunobu, Fumihiro| Ashida, Kozo| Mifune, Takashi| Hosaki, Yasuhiro| Tsugeno, Hirofumi| Okamoto, Makoto| Iwagaki, Naofumi| Yamamoto, Kazuhiko| Tanizaki, Yoshiro| Nakai, Mutsuo| Akiyama, Tsuneo| Hasegawa, Harumi|
Abstract The maximal percent low attenuation area < -950 HU (% LAA) among three anatomic lung levels on high resolution computed tomography (HRCT) was examined in patients with asthma, classified by the degree of % LAA, in relation to the mean CT number, % FVC of the predicted value, and FEV 1/FVC (FEV1%). 1 . The mean CT number was closely related to the degree of % LAA of the lungs. The mean CT number was significantly lower in patients with high % LAA (mean CT number-915.3HU, % LAA 37.6%) than in those with low % LAA (-852.9HU, 4.7%). 2. The FEV1% value was significantly lower in patients with high % LAA (47.8%) than in those with low % LAA (62.2%)(p<0.05). The % FVC value was also significantly lower in patients with high % LAA (77.1%) compared to the value in those with low % LAA (101.2%). The results suggest that a large volume of LAA<-950HU of the lungs can be observed in patients with asthma, and the % LAA is closely correlated with mean CT number and the values of FEV1% and % FVC.
Abstract Alternative HRCT (high resolution computed tomography)により,-950HU以下のlow attenuation area(LAA)を3つの高さの肺野レベルで観察し,そのなかの最も高い値をmaximal% LAAとして表し,この値と平均CT number, % FVCおよびFEV1.0%の値と比較検討した。1.平均CT numberは,maximal% LAAと密接な関連を示した。そして,平均CT numberは,% LAAが低い症例(% LAA :4.7%, mean CT number:-852.9HU)に比べ,% LAAが高い症例(% LAA :37.6%, mean CT number:-915.3HU)において低い傾向が見られた。2.FEV1.0%値は,% LAA値が低い症例(62.2%)に比べ% LAA値が高い症例(47.8%)において有意に低い値を示した(P<0.05)。% FVC値も同様% LAA値が低い症例(101.2%)に比べ高い症例(77.1%)で低い値を示したが両群間に有意の差は見られなかった。これらの結果より,気管支喘息においも,HRCT上肺野で-950HU以下のLow attenuation area(LAA)を示す症例が見られること,そして,% LAAは,mean CT number,FEV1.0%や% FVC値とある程度関連していることが示唆された。
Keywords bronchial asthma % LAA mean CT number FEV1 FVC
Publication Title 岡大三朝分院研究報告
Published Date 1997-12
Volume volume68
Start Page 15
End Page 21
ISSN 0918-7839
language 英語
File Version publisher
NAID 120002308351