result 9304 件
JaLCDOI | 10.18926/17849 |
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FullText URL | Mem_Fac_Eng_OU_43_99.pdf |
Author | Kato, Hidehiro| Nogami, Yasuyuki| Morikawa, Yoshitaka| |
Abstract | A square root (SQRT) algorithm in extension field F(p(m))(m = r(0)r(1)・・・r(n−1)・2(d), r(i) : odd prime, d : positive integer) is proposed in this paper. First, a conventional SQRT algorithm, the Tonelli-Shanks algorithm, is modified to compute the inverse SQRT in F(p(2d)), where most of the computations are performed in the corresponding subfields F(p(2i)) for 0 ≤ i ≤ d-1. Then the Frobenius mappings with addition chain are adopted for the proposed SQRT algorithm, in which a lot of computations in a given extension field F(p(m)) are also reduced to those in a proper subfield by the norm computations. Those reductions of the field degree increase efficiency in the SQRT implementation. The Tonelli-Shanks algorithm and the proposed algorithm in F(p(6)) and F(p(10)) were implemented on a Core2 (2.66 GHz) using the C++ programming language. The computer simulations showed that, on average, the proposed algorithm accelerated the SQRT computation by 6 times in F(p(6)), and by 10 times in F(p(10)), compared to the Tonelli-Shanks algorithm. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 99 |
End Page | 107 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308980 |
JaLCDOI | 10.18926/17847 |
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FullText URL | Mem_Fac_Eng_OU_43_93.pdf |
Author | Ueno, Hirokazu| Morikawa, Yoshitaka| |
Abstract | This paper investigates the relation between error distribution and predictive order of minimum mean abusolute error predictors (MMAE predictors) designed for lossless coding of grayscale images. Design of MMAE predictors reduces to the linear programming problem. Let k be the number of coefficients in a predictor (predictor order), we imagine that predictor order k may have a distribution shaping effect. Main purpose of this paper is to ensure that k has such an effect. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 93 |
End Page | 98 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308979 |
JaLCDOI | 10.18926/17844 |
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FullText URL | Mem_Fac_Eng_OU_43_75.pdf |
Author | Ohe, Keita| Konishi, Masami| Imai, Jun| |
Abstract | As is well known, an advanced knowledge and know-how are needed in the design and the diagnosis work. Further, human experts can cope with the recent trend of customers needs. Therefore, the design and the diagnosis work have been privately performed in the past, and its information cannot be shared. In addition, the number of experts is decreasing. It is a very important problem to maintain and to extend experts technologies having been built up. For the purpose, methods and systems for technical inheritance of the advanced techniques of the skilled engineers are needed to train the unskilled operators and also can assist skilled operators. In this research, attention is focused on the design of analog filter circuit. To attain the target, the circuit structural classifier system to support design work is developed. Furthermore, simulation technology for hot strip rolling mills based on distributed agents is presented aimed to develop tools for the diagnosis of hot strip rolling mills operation. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 75 |
End Page | 92 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308900 |
JaLCDOI | 10.18926/17843 |
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FullText URL | Mem_Fac_Eng_OU_43_61.pdf |
Author | Kawamura, Mao| Konishi, Masami| Yamagata, Katuki| Shimomura, Koichi| |
Abstract | In this research, a Human Interface system is designed intended to mobile crane. The intervention of human is unavoidable to attain the high performance of electro mechanical system. As is known, crane operation is complicated. Recently, the decrease of expert person induced crane accident. So in near future, it is required a partial automation of crane operation and human support technology. We are aiming at the development of the operation support system for a crane. In this research, development of the hydro mechanical models representing both of static and dynamics movements are made. Further, actual experimental data of operating mobile crane, which are electrical signal data and three-dimension (3D) position of moving load is measured. The actual operating data are compared with the model and it is found that the developed electromechanical model can explain the behaviors of actual data. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 61 |
End Page | 74 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308930 |
JaLCDOI | 10.18926/17841 |
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FullText URL | Mem_Fac_Eng_OU_43_55.pdf |
Author | Inoue, Shinichiro| Konishi, Masami| Imai, Jun| |
Abstract | In this research, an image processing method and a system for inspection support of a rod figured cutting tool are developed. As is well known, the visual inspection of a cutting tool by image processing is not easy, because cutting blade have a helical blade structure. To cope with the problem, an experimental facility with rotation and longitudinal tool shift functions to enable acquisition of blade surface pictures along a cutting rod is developed. The type of the defect treated in this paper is the spot of coating on blade surface. To judge the quality of the processed image of blade surface, neural network with autonomous learning is used. The processed image of cutting tool is divided into 64 × 64 blocks used for the input to the neural networks. Before input, each block data is preprocessed applying a edge detection filter and a transformation by the discrete fourier transform (DFT). Using these technologies, the experimental inspection system is built and tested to check the capabilities of the inspection algorithms. The diagnostic performance of the surface defect of a cutting tool was confirmed. There remained a problem to mis judge the normal tools as the defect. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 55 |
End Page | 60 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308973 |
JaLCDOI | 10.18926/17839 |
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FullText URL | Mem_Fac_Eng_OU_43_49.pdf |
Author | Akamatsu, Shinya| Konishi, Masami| Imai, Jun| |
Abstract | In this paper, the controlled target is the SCARA robot with two links, and the object is fine control of the arm head position of the robot. To attain the object, Internal Model Control (IMC) is introduced. A nonlinear equations are for robot dynamics formulated by solving Lagrange equation, and is linearized to design control system by IMC. The controller of IMC is designed or synthesisted as the inverse system of the linearized model, and IMC filter model is selected. Also, reference filter is introduced to make the improvement of performance. The result of control performance by IMC is compared with that of PID numerically, accuracy and incoherency are confirmed. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 49 |
End Page | 54 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308854 |
JaLCDOI | 10.18926/17837 |
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FullText URL | Mem_Fac_Eng_OU_43_39.pdf |
Author | Kuwashima, Takayuki| Imai, Jun| Konishi, Masami| |
Abstract | This paper presents method of the controller design for one link arm with parametric uncertainty. Recently, many manufacturing robots are operated in manufacturing facilities, with the aim of labor and cost saving or improvement of the productivity. Such robots need to have positioning performance of high precision. In condition that there is an uncertainty in plant dynamics, desired control performance may not be attained because the controller is designed according to the mathematical model of a plant. So it is important that the designed control system have a robust control performance. In this paper, the robust controller is designed using Quantitative Feedback Theory (QFT) for one link arm with parametric uncertainty. Simulation experiments are run for control system designed by using QFT and conventional method. The results are compared with each other and it is found that the control system designed by QFT shows a robust performance and can suppress the unevenness of output against parametric uncertainty. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 39 |
End Page | 48 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308875 |
JaLCDOI | 10.18926/17835 |
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FullText URL | Mem_Fac_Eng_OU_43_32.pdf |
Author | Mabuchi, Shuji| Konishi, Masami| Imai, Jun| |
Abstract | A tractor-trailer vehicle in the factory might move on the route determined beforehand. However, automation of a tractor-trailer vehicle is difficult so that it is necessary to consider the nonlinearity of a vehicle and a trailer. In this research, the effective tracking control method of a tractor-trailer vehicle is proposed. The control method using time-state control form for a preview control is presented, and be applied a tractor-trailer vehicle with nonholonomic characteristics. Results of numerical experiments are presented to check effectiveness of the proposed control method. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 32 |
End Page | 38 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308736 |
JaLCDOI | 10.18926/17833 |
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FullText URL | Mem_Fac_Eng_OU_43_27.pdf |
Author | Totsuji, Hiroo| |
Abstract | When the Coulomb coupling between fine particles becomes sufficiently strong in fine particle plasmas, the isothermal compressibility of the whole system diverges and we have a phase separation and an associated critical point. Experimental conditions of fine particle plasmas, densities and temperatures of components and the fine particle size, are obtained corresponding to characteristic parameters around the critical point and the dependency on ion species and other factors is discussed. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 27 |
End Page | 31 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308947 |
JaLCDOI | 10.18926/17831 |
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FullText URL | Mem_Fac_Eng_OU_43_22.pdf |
Author | Totsuji, Hiroo| Chai Hong| Totsuji, Chieko| Tsuruta, Kenji| |
Abstract | For the transfer of quantum information and the creation of entangled states, the application of tuned spin chains, systems of spins with the nearest-neighbor coupling tuned so as to give high efficiency, has been proposed and some examples of high performance have been given by several authors. In this article, the effect of deviations from tuned values and the effect of resultant asymmetry are investigated through numerical simulations and theoretical analyses. It is shown that there exists a system where the transfer efficiency is comparable with exactly tuned ones and, at the same time, robust to noises in the coupling constants. It is also shown that the effect of asymmetry on the efficiency of entanglement creation is of the second order when the asymmetry is small. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 22 |
End Page | 26 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308966 |
JaLCDOI | 10.18926/17829 |
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FullText URL | Mem_Fac_Eng_OU_43_16.pdf |
Author | Kurose Tomoyuki| Tsuruta, Kenji| Totsuji, Chieko| Totsuji, Hiroo| |
Abstract | The finite-difference time-domain (FDTD) method has been applied to the calculation of the phonon band structure of two-dimensional (2D) phononic crystals, consisting of metal cylinders placed periodically in liquid. By comparing several combinations of materials for metal cylinder and liquid, we analyze the dependence of the band structures on sound speed and density of liquid media. Moreover, the negative refraction of the acoustic waves is observed at the interfaces between phononic crystal slab and the liquid. We find that an acoustic“lens effect”with the slab appears due to the negative refractions. The relationship between the focal intensity in the lens effect and the band structure is discussed. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 16 |
End Page | 21 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308928 |
JaLCDOI | 10.18926/17826 |
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FullText URL | Mem_Fac_Eng_OU_43_8.pdf |
Author | Umeda Ryosuke| Totsuji, Chieko| Tsuruta, Kenji| Totsuji, Hiroo| |
Abstract | Metamaterial which has negative permittivity and permeability is investigated via computer simulations. Effects of the nanostructure on dielectric and magnetic properties of the material are taken into account by introducing the Drude-Lorentz model in the materials dispersion. We include multi-band process in the dielectric response in order to reproduce accurately experimental values of bulk Au thin film. Size effect on the dispersion is examined by comparing the model with that of a noble metal particle. Based on the dispersion model constructed, we analyze the electromagnetic response of nanostructured metamaterials to evanescent waves at microwave and optical frequencies via finite-difference time-domain simulatioins on parallel computer. A re- focusing and an amplification of the evanescent waves propagating through a metamaterial, consisting of metal slab/vacuum stacking, is demonstrated for the frequencies of 30GHz and 744THz. |
Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
Published Date | 2009-01 |
Volume | volume43 |
Start Page | 8 |
End Page | 15 |
ISSN | 1349-6115 |
language | English |
File Version | publisher |
NAID | 120002308833 |
JaLCDOI | 10.18926/17822 |
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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 | English |
File Version | publisher |
NAID | 120002308710 |
JaLCDOI | 10.18926/bgeou/16104 |
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Title Alternative | A Critical Evaluation of Kohut's Theory of Narcissistic Personality Disiorder |
FullText URL | 141_143_152.pdf |
Author | Kamiji, Yuichiro| |
Abstract | 自己愛性パーソナリティ障害に関するKohutの見解を,彼と対立した Kernbergの見解,DSM-Ⅳの診断基準,自己愛性パーソナリティ障害の二類型論などと関連させて論じた。その結果,Kohutの言う自己愛性パーソナリティ障害を「自己愛の障害のある患者」と呼び換え,DSM-Ⅳによって診断されるそれとは区別したほうがよいという丸田(1995)の見解が妥当であることを主張した。自己愛性パーソナリティ障害に関するKohutの見解の問題点として,まず,Kohutが誇大自己と呼んだ自己発揚的傾向と,防衛的誇大性とは区別すべきであることを指摘した。次に,自己愛性パーソナリティには理想自己と現実自己の乖離がみられるというBroucek (1982,1991)や岡野(1998)の見解と,自己愛性パーソナリティは高い理想を持つ人ではないというKohut(1971)の見解のずれについて,これは理想についての両者の理解のずれから生じているのではないかということを示唆した。 |
Publication Title | 岡山大学大学院教育学研究科研究集録 |
Published Date | 2009-06-25 |
Volume | volume141 |
Start Page | 143 |
End Page | 152 |
ISSN | 1883-2423 |
language | Japanese |
File Version | publisher |
NAID | 120002306254 |
JaLCDOI | 10.18926/bgeou/16102 |
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Title Alternative | Theoretical Study of Teacher's Social Influence on Their pupils I : Consideration by Scope of Influence Process and Social Power Perspective |
FullText URL | 141_135_142.pdf |
Author | Kamada, Masafumi| Fuchigami, Katsuyoshi| |
Abstract | 本稿は,日常の学校業務において教師が児童・生徒に対して持つ影響力に焦点をあて,教師による影響が児童・生徒によって受け入れられていく際の影響プロセスに関する社会心理学的な理論モデルを概観し,教育実践研究において影響プロセスに注目する意義を考察する。さらに教師の影響力の大きさや内容を決定する重要な要因である社会的勢力資源に関する先行研究を概観する。日常の交流のなかで,教師は各影響場面における目的,状況にそった働 きかけを児童・生徒に対し行っていく必要がある。本稿は,社会的勢力に関する研究の視点から,各勢力資源の使用のメリット,デメリットについて検討する。最後に教育場面における社会的勢力研究の方法,将来的に期待できる社会的勢力に関する発展研究についても考察する。 |
Keywords | 社会的勢力 影響プロセス コミットメント 生徒指導 学習意欲 |
Publication Title | 岡山大学大学院教育学研究科研究集録 |
Published Date | 2009-06-25 |
Volume | volume141 |
Start Page | 135 |
End Page | 142 |
ISSN | 1883-2423 |
language | Japanese |
File Version | publisher |
NAID | 120002306796 |
JaLCDOI | 10.18926/bgeou/16101 |
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Title Alternative | The Effects of Trait Anxiety on Attentional Disengagement from the Threaten Word |
FullText URL | 141_127_133.pdf |
Author | Ueda, Ayaka| Terasawa, Takafumi| |
Abstract | 不安障害における自動的処理を検討する研究において,注意バイアスが不安を維持し,また,不安障害を進行させることが指摘されている。近年の研究では,高不安者は脅威刺激から注意を解放することに問題があることが明らかにされている。そこで,本研究では情動空間的手がかりパラダイム(Fox, Russo, Bowels, & Dutton,2001)を用いて,脅威語からの注意の解放に特性不安の高低が及ぼす影響について検討した。課題では,画面中央に手がかり刺激(ネガティブ語,ポジティブ語,ニュートラル語)が提示された後,刺激の周辺に提示されるターゲット刺激を判断することが要求された。その結果,高不安者は低不安者よりも反応時間が全体的に長かった。 |
Keywords | 特性不安 注意バイアス 注意の解放 情動空間的手がかりパラダイム |
Publication Title | 岡山大学大学院教育学研究科研究集録 |
Published Date | 2009-06-25 |
Volume | volume141 |
Start Page | 127 |
End Page | 133 |
ISSN | 1883-2423 |
language | Japanese |
File Version | publisher |
NAID | 120002306567 |
JaLCDOI | 10.18926/bgeou/16099 |
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Title Alternative | Work-related stress and eating behavior associated with multiple lifestyle-related diseases among male workers |
FullText URL | 141_115_126.pdf |
Author | Ando, Mikayo| Asakura, Takashi| Gabriele Giorgi| |
Abstract | The objective of this study was to identify work-related stress and lifestyle associated with multiple lifestyle-related diseases. Male workers aged 19-66 years (N=490) completed a self-reported questionnaire. Relationships between demographic variables, work-related stress variables, lifestyle variables and multiple lifestyle related diseases were investigated using regression analyses and path analyses. A best fit path model on multiple lifestyle-related diseases was constructed using eating behaviors as mediators. Age, education, binge eating and overeating were significantly associated with multiple lifestyle-related diseases in the direct paths. Depression and inflexible workplace climate were significantly associated with multiple lifestyle-related diseases in the indirect paths through the variables, binge eating and overeating. These findings suggest that workers' mental health and workplace climate, as well as unhealthy eating behaviors, may be important factors in preventing lifestyle-related diseases in male workers. |
Keywords | 生活習慣病 抑うつ状態 職場ストレス 食行動 パス解析 |
Publication Title | 岡山大学大学院教育学研究科研究集録 |
Published Date | 2009-06-25 |
Volume | volume141 |
Start Page | 115 |
End Page | 126 |
ISSN | 1883-2423 |
language | Japanese |
File Version | publisher |
NAID | 120002306335 |
JaLCDOI | 10.18926/bgeou/16098 |
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Title Alternative | Essai sur la Rèforme de la Formation des Instituteurs en la Troisième Rèpublique (7) |
FullText URL | 141_107_114.pdf |
Author | Onoue, Masanobu| |
Abstract | 本稿では,1879年の師範学校設置法成立後,師範学校における「教育学的教育」の内実がどのように充実・展開していったか,1881年の政令・省令・指示を時系列に即して整理・概観することで,その方向性をあきらかにした。設置法成立直後に制定された師範学校教育課程に関する省令や指示において実施が企図された「教育学」の具体的な内容と方法としては,師範学校本校における「演習」―「口頭による教授」すなわち「教授」の訓練―と,附属学校の実習による授業と学級指導の訓練であった。これに,初等教育の「正教員」として不可欠な教養とされた「学校管理」―学校と教師にかかわる法制的知識に関する教授―が加わり,全体として「教育学」教育とされたのである。師範学校設置法(案)審議過程において教育改革立案・推進主体が主張した師範学校における「教育学的教育」の内実が,このような内容と方法をもって法制的に整備されていったと言うことができるのである。 |
Keywords | 第三共和政 師範学校 教育学 附属学校 実習 学校管理 |
Publication Title | 岡山大学大学院教育学研究科研究集録 |
Published Date | 2009-06-25 |
Volume | volume141 |
Start Page | 107 |
End Page | 114 |
ISSN | 1883-2423 |
language | Japanese |
File Version | publisher |
NAID | 120002306777 |
JaLCDOI | 10.18926/bgeou/16097 |
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Title Alternative | A study of elderly women's sport activity -Focus on participants in the women's volleyball meeting- |
FullText URL | 141_097_105.pdf |
Author | Tokunaga, Toshifumi| |
Abstract | ママさんバレーボール「ことぶき大会」参加者の特徴として以下のことが明らかになった。学生時代での部経験者が多く,また,4分の3の者が結婚後すぐにママさんバレーを始めている。バレー経験が長く,バレーボールが楽しくて仕方のない人たちがこの大会に参加しているように思われる。しかし,必ずしも健康状態に問題の無い人たちばかりではない。大会があることによってバレーをする"大義名分"が出来る。「いそじ大会」,「ことぶき大会」の存在は彼女らがバレーボールをすることの強い味方になっている。他県の選手との交流意識は高くない。どちらかと言うと,仲間内で数日間同じホテルに宿泊し親交を深めることを大切にしている人々が多い。地域の違いを見ると,『関東』,『東海・関西』などのいわゆる都会のママさんの方がよりバレーボール活動を含めた余暇活動を楽しんでいるように思える。 |
Keywords | ママさんバレーボール 高齢者 ことぶき大会 ライフスタイル |
Publication Title | 岡山大学大学院教育学研究科研究集録 |
Published Date | 2009-06-25 |
Volume | volume141 |
Start Page | 97 |
End Page | 105 |
ISSN | 1883-2423 |
language | Japanese |
File Version | publisher |
NAID | 120002306851 |
JaLCDOI | 10.18926/bgeou/16095 |
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Title Alternative | A Case Study on the Relationship of Public Sport Facilities and Synthesized Community Sports Club |
FullText URL | 141_091_096.pdf |
Author | Ohashi, Yoshikatsu| Nakao, Michiko| |
Keywords | 公共スポーツ施設 地域スポーツクラブ |
Publication Title | 岡山大学大学院教育学研究科研究集録 |
Published Date | 2009-06-25 |
Volume | volume141 |
Start Page | 91 |
End Page | 96 |
ISSN | 1883-2423 |
language | Japanese |
File Version | publisher |
NAID | 120002306773 |