著者 Faculty of Engineering, Okayama University|
発行日 2004-03
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
38巻
1-2号
資料タイプ その他
JaLCDOI 10.18926/46955
フルテキストURL mfe_38_1-2_091_096.pdf
著者 Kanayama, Naoki| Yamakoshi, Kimi| Kiyomi, Masaaki| Magari, Masaki| Ohmori, Hitoshi|
抄録 Generally, IgM antibodies (Abs) produced in a primary immune response show lower affinity for an inducing antigen (Ag) compared with the corresponding IgG Abs that are major switched isotypes formed in the secondary response. An IgM molecule is a pentamer with 10 Ag-binding sites that will contribute to an increase of avidity for an Ag. To estimate the contribution of the pentameric structure to the avidity of an IgM Ab, we generated IgM and IgG1 monoclonal Abs (mAbs) with identical V regions that are specific for 4-hydroxy-3-nitrophenylacetyl (NP) by in vitro class switching of B cells followed by the cell fusion with a mouse myeloma cell line. Compared with an anti-NP IgG1 mAb, the corresponding IgM mAb showed much higher avidity for NP-conjugated bovine serum albumin, which was drastically reduced after being dissociated into monomers.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2004-03
38巻
1-2号
開始ページ 91
終了ページ 96
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80017001822
JaLCDOI 10.18926/46953
フルテキストURL mfe_38_1-2_061_071.pdf
著者 Kanatani, Kenichi| Sugaya, Yasuyuki|
抄録 The Tomasi-Kanade factorization for reconstructing the 3-D shape of the feature points tracked through a video stream is widely regarded as based on factorization of a matrix by SVD (singular value decomposition). This paper points out that the core principle is the affine camera approximation to the imaging geometry and that SVD is merely one means of numerical computation. We first describe the geometric structure of the problem and then give a complete programming scheme for 3-D reconstruction.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2004-03
38巻
1-2号
開始ページ 61
終了ページ 71
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80016889443
JaLCDOI 10.18926/46952
フルテキストURL mfe_38_1-2_039_059.pdf
著者 Kanatani, Kenichi|
抄録 We investigate the meaning of "statistical methods" for geometric inference based on image feature points. Tracing back the origin of feature uncertainty to image processing operations, we discuss the implications of asymptotic analysis in reference to "geometric fitting" and "geometric model selection", We point out that a correspondence exists between the standard statistical analysis and the geometric inference problem. We also compare the capability of the "geometric AIC" and the "geometric MDL' in detecting degeneracy. Next, we review recent progress in geometric fitting techniques for linear constraints, describing the "FNS method", the "HEIV method", the "renormalization method", and other related techniques. Finally, we discuss the "Neyman-Scott problem" and "semiparametric models" in relation to geometric inference. We conclude that applications of statistical methods requires careful considerations about the nature of the problem in question.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2004-03
38巻
1-2号
開始ページ 39
終了ページ 59
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80016889442
JaLCDOI 10.18926/14157
フルテキストURL Mem_Fac_Eng_39_1_82.pdf
著者 Wang, Feng| Nogami, Yasuyuki| Morikawa, Yoshitaka|
抄録 In this paper, we focus on developing a high-speed square root (SQRT) algorithm required for an elliptic curve cryptosystem. Examining Smart algorithm, the previously well-known SQRT algorithm, we can see that there is a lot of computation overlap in Smart algorithm and the quadratic residue (QR) test, which must be implemented prior to a SQRT computation. It makes Smart algorithm inefficient. The essence of our proposition is thus to present a new QR test and an efficient SQRT algorithm to avoid all the overlapping computations. The authors devised a SQRT algorithm for which most of the data required have been computed in the proposed QR test. Not only there is no computation overlap in the proposed algorithm and the proposed QR test, but also in the proposed algorithm over GF(p(2)) (4 | p − 1) some computations can be executed in GF(p); whereas in Smart algorithm over GF(p(2)) all the computations must be executed in GF(p(2)). These yield many reductions in the computational time and complexity. We implemented the two QR tests and the two SQRT algorithms over GF(pm) (m=1, 2) in C++ language with NTL (Number Theory Library) on Pentium4 (2.6GHz), where the size of p is around 160 bits. The computer simulations showed that the proposed QR test and the proposed algorithm over GF(p(m)) were about 2 times faster than the conventional QR test and Smart algorithm over GF(p(m)).
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 82
終了ページ 92
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308422
JaLCDOI 10.18926/14135
フルテキストURL Mem_Fac_Eng_39_1_7.pdf
著者 王 暁群| 阿部 武治| 多田 直哉| 清水 一郎|
抄録 Roughening on free surface of polycrystalline metal during plastic deformation is closely related to the inhomogeneous deformation in the respective grain at the surface. Uniaxial tensile tests are carried out on annealed pure aluminum sheet specimens with various averaged grain sizes. The roughening is measured by a 3-dimensional stylus instrument to examine the roughness change in both sides of specimen surfaces at each strain. The irregularities on one side are reversed on the backside, when the averaged grain size is as large as the thickness of the specimen. Discussions are made on the relation between the surface shapes of both sides adopting the cross correlation factor. The strains of respective grains are also measured from the grain boundary shape before and after plastic deformation. There are some deviations in the strains of the grains and their standard deviation increases with the applied strain.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 7
終了ページ 15
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308149
JaLCDOI 10.18926/14150
フルテキストURL Mem_Fac_Eng_39_1_46.pdf
著者 門野 恵典| 東辻 千枝子| 鶴田 健二| 東辻 浩夫|
抄録 We present a real-space, polynomial-expansion approach to electron dynamics in nanostructured semiconductors. The Chebyshev expansion method is employed for efficient calculation of timeevolution of single-electron wave function. Details of the formulation are described. The method is applied to the electron transport in nanostructured semiconductors such as Si nanowires. The mean-square displacement and diffusivity of electron in Si chains are obtained as functions of length of the chains. The results show clearly ballistic behavior of electron in the pure Si chain.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 46
終了ページ 51
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308231
JaLCDOI 10.18926/14152
フルテキストURL Mem_Fac_Eng_39_1_52.pdf
著者 金森 克也| 東辻 千枝子| 鶴田 健二| 東辻 浩夫|
抄録 Thermal behavior of Coulomb clusters in a three dimensional confining potential is investigated by molecular dynamics simulations for system sizes of 1,000 to 20,288 ions. The specific heat of the system of shell-structured 20,000 ions is peaked almost at the same temperature as the system of bcc-structured 20,288 ions with much sharper structure for the latter. The diffusion coefficient and the peak to valley ratio of the two-dimensional pair distribution function on the outermost shell are obtained both as a function of temperature. The rotational movement of each shell in the system of 104 ions is observed.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 52
終了ページ 55
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308445
JaLCDOI 10.18926/14156
フルテキストURL Mem_Fac_Eng_39_1_71.pdf
著者 Nogami, Yasuyuki| Morikawa, Yoshitaka|
抄録 This paper proposes an algorithm for generating prime order elliptic curves over extension field whose extension degree is a power of 2. The proposed algorithm is based on the fact that the order of the twisted elliptic curve is able to be a prime number when the extension degree for the twist operation is a power of 2. When the definition field is F(2(40)−87)(4) , the proposed algorithm can generate a prime order elliptic curve within 5 seconds on PentiumIII (800MHz) with C language.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 71
終了ページ 81
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308036
JaLCDOI 10.18926/14158
フルテキストURL Mem_Fac_Eng_39_1_93.pdf
著者 五百旗頭 健吾| 豊田 啓孝| 和田 修己| 古賀 隆治|
抄録 The optical properties of clouds were measured with a polarization Mie lidar during April, 2004 and investigated to categorize the particles detected by the lidar. The cloud layers were categorized into five types according to the depolarization ratios, as follows: (I) constant and small (less than 5%); increasing with height (II) nearly from 0% and (III) from about 50%; (IV) large and varying with the backscattering coefficient; and (V) sharply decreasing. This categorization of clouds enabled us to separate aerosols from clouds in a lidar signal. Comparison of the backscattering coefficients between clouds of types (I) and (II) suggested that the depolarization ratio induced by multiple scattering in dense clouds does not depend on the particle density. Estimation of the particle phase for the five cloud categories was also examined.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 93
終了ページ 101
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308479
JaLCDOI 10.18926/14155
フルテキストURL Mem_Fac_Eng_39_1_63.pdf
著者 金谷 健一|
抄録 Geometric fitting is one of the most fundamental problems of computer vision. In [8], the author derived a theoretical accuracy bound (KCR lower bound) for geometric fitting in general and proved that maximum likelihood (ML) estimation is statistically optimal. Recently, Chernov and Lesort [3] proved a similar result, using a weaker assumption. In this paper, we compare their formulation with the author’s and describe the background of the problem. We also review recent topics including semiparametric models and discuss remaining issues.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 63
終了ページ 70
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308366
JaLCDOI 10.18926/14153
フルテキストURL Mem_Fac_Eng_39_1_56.pdf
著者 菅谷 保之| 金谷 健一|
抄録 We present a new method for extracting objects moving independently of the background from a video sequence taken by a moving camera. We first extract and track feature points through the sequence and select the trajectories of background points by exploiting geometric constraints based on the affine camera model. Then, we generate a panoramic image of the background and compare it with the individual frames. We describe our image processing and thresholding techniques.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 56
終了ページ 62
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308594
JaLCDOI 10.18926/14149
フルテキストURL Mem_Fac_Eng_39_1_40.pdf
著者 Al-Sehaim, Sulaiman| 小西 正躬| 能勢 和夫|
抄録 In this paper, two problems, plant allocation problem and that of transfer routing from plants to customers, are considered simultaneously. Especially, adaptation scheme for emergency cases are checked. To solve these problems, decentralized agent based optimization procedures are used. In our study, oil production and products transfer in Saudi Arabia are treated. Through numerical experiments, practicability of the proposed method is verified.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 40
終了ページ 45
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308505
JaLCDOI 10.18926/14134
フルテキストURL Mem_Fac_Eng_39_1_1.pdf
著者 Vladimir I. Klochikhin| 藤井 正浩| 吉田 彰|
抄録 Improvement of wear resistance and durability of machine elements with sliding friction pairs is the important tribological problems. The wear resistance has been determined with many configurative parameters, technological parameters, and operational parameters. In this study kinematics of cylindrical joint (CJ), whose motion is reciprocating and rotating, and influence of various parameters on wear resistance of friction pair was investigated.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 1
終了ページ 6
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308183
JaLCDOI 10.18926/14136
フルテキストURL Mem_Fac_Eng_39_1_16.pdf
著者 内田 哲也| 石丸 早苗| 島村 薫| 宇治 章人| 松尾 俊彦| 大月 洋|
抄録 PE film was treated with fuming nitric acid at 80℃ for 20 min, resulting in introduction of COOH moieties on the film surface. The COOH’s were reacted with ethylenediamine, whose amino groups were used for linking with (2-[4-(dibutylamino)phenyl]ethenyl)-3-carboxy-methylbenzo-thiazolium, photoelectric dye (NK-5962), which absorbs visible light and converts the photon energy to electric potentials. The dye molecules were immobilized on the PE film surface and they were able to stimulate chick retinal tissues on incidence of visible light. These facts hopefully lead to development of an artificial retinal prosthesis.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 16
終了ページ 20
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308066
JaLCDOI 10.18926/14146
フルテキストURL Mem_Fac_Eng_39_1_21.pdf
著者 鳥越 崇史| 小西 正躬| 今井 純| 西 竜志|
抄録 In this paper, neuro based intelligent diagnosis methods for electro-mechanical control system are proposed. A self organizing map neural network (SOM) is used to classify measured data of the target system as a qualitative diagnostic method. Besides of the above procedure, it is expected to attain more efficient maintenance by a quantitative estimation of failure. For the purpose, new method is proposed using a hierarchical neural network (HNN). In the method, classified results by SOM are processed for the quantitative diagnosis. Hierarchical neural network can identify inner structure of the relations between failure causes and its results that enables a quantitative diagnosis.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 21
終了ページ 27
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308342
JaLCDOI 10.18926/14148
フルテキストURL Mem_Fac_Eng_39_1_28.pdf
著者 石丸 和史| 小西 正躬| 今井 純| 西 竜志|
抄録 In reactor furnace, due to high temperature and high pressure, data can be measured only near the furnace wall. In this paper, the way to estimate temperature distribution in a reactor furnace using measured data near the furnace walls and to control temperature distribution to the desired temperature distribution was studied. In the estimation, SQP method is employed using measured data near the furnace walls. As the result, the whole temperature distribution in a furnace could be obtained from such limited data. Furthermore, to control the temperature distribution in a reactor furnace, gas flow from multiple tuyeres and supplying material for controlling temperature distribution in a reactor furnace were determined by the SQP method. It was shown that temperature distribution in a furnace was regulated to achieve various desired distribution. Thus, it was verified that complicated temperature distribution in a reactor furnace could be controlled by combining furnace simulation and SQP method.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 28
終了ページ 39
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308270
JaLCDOI 10.18926/14096
フルテキストURL Mem_Fac_Eng_OU_40_1_1.pdf
著者 馬 有理| 清水 憲一| 鳥居 太始之|
抄録 A testing for bent fatigue crack propagation under mixed-mode conditions was carried out using fatigue and annealed slant precracks with different slant angles, β ,defined as the angle between loading and precrack directions in a rectangular plate. As a result, bent fatigue crack from the fatigue precrack with β =45deg. propagated under mixed-mode conditions with mode II stress intensity factor (K(II))(est) evaluated from the discontinuous displacement measured along the crack. On the other hand, bent fatigue crack from the fatigue precrack with β =60deg. and from the annealed precracks with both slant angles of β =60deg. and β =45deg. propagated under the mode I behavior. This was because the compressive residual stress near the fatigue precrack caused contact to each other between the upper and the lower surfaces of the precrack with the smaller slant angle β . Furthermore, the fatigue crack propagation rates indicated almost the same relationship for all the data, using the mixed-mode effective stress intensity factor (K(M))(est), calculated from the discontinuous displacement measured along the bent fatigue crack.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2006-01
40巻
1号
開始ページ 1
終了ページ 8
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308402
JaLCDOI 10.18926/14126
フルテキストURL Mem_Fac_Eng_OU_40_1_84.pdf
著者 Nogami, Yasuyuki| Morikawa, Yoshitaka|
抄録 This paper particularly deals with elliptic curves in the form of E(x, y) = y(2) − x(3) −b = 0, b ∈ F(* q) , where 3 divides q−1. In this paper, we refer to the well-known twist technique as x-twist and propose y-twist. By combining x-twist and y-twist, we can consider six elliptic curves and this paper proposes a method to obtain the orders of these six curves by counting only one order among the six curves.
キーワード elliptic curve twist third power residue/non-residue
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2006-01
40巻
1号
開始ページ 83
終了ページ 94
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308548
JaLCDOI 10.18926/14125
フルテキストURL Mem_Fac_Eng_OU_40_1_78.pdf
著者 船曳 信生| 磯貝 愛| 東野 輝夫| Oda Masashi|
抄録 A variety of studies on face components such as eyes, lips, noses, and teeth have been proceeding in medicine, psychology, biometrics authentication, and other areas. In this paper, we present an algorithm of extracting eye contours from a face image using the deformable template matching method. Our template for an eye contour is composed of three quadratic functions for the perimeter and one circle for the pupil. In our algorithm, a digital color face image is rst converted to a binary image of representing eyes, after the region around eyes is identied on the face image by using hues and values of the color image. Then, parameters in the template are optimized by a local search method with a tabu period and a hill-climbing, so as to t the template to the eye contour in the binary image. The accuracy of our algorithm is evaluated through sample face images of students. In addition, the application of our proposal to eye shape indices is investigated in a face image database "HOIP", where recognizable dierence exists in index distributions between males and females.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2006-01
40巻
1号
開始ページ 78
終了ページ 82
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308500