result 48721 件
| Author | Suzuki, Tsuneo| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| Author | Fujiwara, Hisako| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| Author | Kawai, Toshio| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| 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 | English |
| File Version | publisher |
| NAID | 120002308945 |
| Author | Kawai, Toshio| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/17851 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_43_108.pdf |
| Author | Nekado, Kenta| Kato, Hidehiro| Nogami, Yasuyuki| Morikawa, Yoshitaka| |
| Abstract | Recently, pairing-based cryptographies such as ID-based cryptography and group signature have been studied. For fast pairing calculation, not only pairing algorithms but also arithmetic operations in extension field must be efficiently carried out. The authors show efficient arithmetic operations of extension field for Xate pairing especially with Freeman curve. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2009-01 |
| Volume | volume43 |
| Start Page | 108 |
| End Page | 112 |
| ISSN | 1349-6115 |
| language | English |
| File Version | publisher |
| NAID | 120002308904 |
| Author | Ito, Nobutaka| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/17849 |
|---|---|
| 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 |
| Author | Kono, Sawayo| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/17847 |
|---|---|
| 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 |
| Author | Sudo, Chizuko| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| Author | Sudo, Chizuko| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/17844 |
|---|---|
| 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 |
|---|---|
| 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 |
| Author | Miyamoto, Toshihiko| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/17841 |
|---|---|
| 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 |
| Author | Fukushima, Isao| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/17839 |
|---|---|
| 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 |
| Author | Fukushima, Isao| |
|---|---|
| Published Date | 1972-10-30 |
| Publication Title | 岡山医学会雑誌 |
| Volume | volume84 |
| Issue | issue9-10 |
| Content Type | Journal Article |
| JaLCDOI | 10.18926/17837 |
|---|---|
| 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 |
