| JaLCDOI | 10.18926/19596 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_31_2_45.pdf |
| 著者 | 尾坂 明義| Kobayashi Keizo| 早川 聡| 大槻 主税| |
| 抄録 | The thermal expansion coefficient of some bioactive glasses in the system CaO-SiO(2)-B(2)O(3) were adjusted to be similar to that of titanium by controlling the composition. A glass of composition 45CaO･30SiO(2)･25B(2)O(3) was selected among those as the enameling glass. A slurry was prepared by mixing the glass powder and ethanal to be developed on titanium and heated at 740℃ for 30 min. Thus treated specimen was soaked in a simulated body fluid (Kokubo solutiion). FT-IR reflection and thin film X-ray diffraction analyses indicated apatite formation on the glass coating layer within 12 h of soaking in the fluid. Thus titanium could be provided with bioactivity due to the enameling. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1997-03-28 |
| 巻 | 31巻 |
| 号 | 2号 |
| 開始ページ | 45 |
| 終了ページ | 51 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309181 |
| JaLCDOI | 10.18926/19594 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_31_2_39.pdf |
| 著者 | Imayoshi Naoki| 早川 聡| 大槻 主税| 尾坂 明義| |
| 抄録 | Nb(2)O(5)-and Ta(2)O(5)-doped calcium si1icate glasses were soaked for various periods in a simulated body fluid(Kokubo solution) up to 30 days. Apatite formation ability of the surface of these glasses were investigated with thin-film X-ray diffraction and FT-IR reflection spectroscopy. The effects of these additive oxides on the bioactivity of CaO･SiO(2) based glass were discussed. A small amount of Nb(2)O(5) and Ta(2)O(5) suppressed the rate of silica hydrogel layer formation and the apatite formation on the surface of the glasses. The rate of the apatite nucleation on the surface of Nb(2)O(5)-doped calcium silicate glass was slower than that on the surface of Ta(2)O(5)-doped calcium silicate glass. It was concluded that the decrease in the apatite forming ability of calcium silicate glasses by these additive oxides is attributed to the suppression of formation of silica hydrogel layer which plays an important role in apatite nucleation. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1997-03-28 |
| 巻 | 31巻 |
| 号 | 2号 |
| 開始ページ | 39 |
| 終了ページ | 44 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309151 |
| JaLCDOI | 10.18926/44497 |
|---|---|
| フルテキストURL | mfe_045_027_036.pdf |
| 著者 | Kanatani, Kenichi| Sugaya, Yasuyuki| |
| 抄録 | We describe in detail the algorithm of bundle adjustment for 3-D reconstruction from multiple images based on our latest research results. The main focus of this paper is on the handling of camera rotations and the efficiency of computation and memory usage when the number of variables is very large; an appropriate consideration of this is the core of the implementation of bundle adjustment. Computing the fundamental matrix from two views and reconstructing the 3-D structure from multiple views, we evaluate the performance of our algorithm and discuses technical issues of bundle adjustment implementation. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2011-01 |
| 巻 | 45巻 |
| 開始ページ | 27 |
| 終了ページ | 35 |
| ISSN | 1349-6115 |
| 言語 | 英語 |
| 著作権者 | Copyright © by the authors |
| 論文のバージョン | publisher |
| NAID | 80021759249 |
| JaLCDOI | 10.18926/48126 |
|---|---|
| フルテキストURL | mfe_046_010_020.pdf |
| 著者 | Kanatani, Kenichi| |
| 抄録 | We present a new technique for calibrating ultra-wide fisheye lens cameras by imposing the constraint that collinear points be rectified to be collinear, parallel lines to be parallel, and orthogonal lines to be orthogonal. Exploiting the fact that line fitting reduces to an eigenvalue problem, we do a rigorous perturbation analysis to obtain a Levenberg-Marquardt procedure for the optimization. Doing experiments, we point out that spurious solutions exist if collinearity and parallelism alone are imposed. Our technique has many desirable properties. For example, no metric information is required about the reference pattern or the camera position, and separate stripe patterns can be displayed on a video screen to generate a virtual grid, eliminating the grid point extraction processing. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2012-01 |
| 巻 | 46巻 |
| 開始ページ | 10 |
| 終了ページ | 20 |
| ISSN | 1349-6115 |
| 言語 | 英語 |
| 著作権者 | Copyright © by the authors |
| 論文のバージョン | publisher |
| NAID | 80022451621 |
| JaLCDOI | 10.18926/15499 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_24_2_49.pdf |
| 著者 | 森 忠次| Machida Ken-ichi| |
| 抄録 | Distance measurements have been more and more easy and accurate to carry out, and it is expected that distance mesurements may provide rather accurate results than angle measurements. Under these circumstances, caracteritics of errors in typical trilateration nets are investigated. The nets investigated are as follows: From single row of chains to pranimetrically extended nets in figure, open and closed networks with respect to external constraint, and with and without as to internal constraint. Computations are performed by use of the method of condition equations, and behaviours of error propagation and errors of coordinates of stations in the nets are shown in case of typical nets. For example, effects for decrease in error by composing a double row of chains and by enforcing external constraints are explained. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1990-03-29 |
| 巻 | 24巻 |
| 号 | 2号 |
| 開始ページ | 49 |
| 終了ページ | 65 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307544 |
| JaLCDOI | 10.18926/15364 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_35_137.pdf |
| 著者 | Sakiyama, Takaharu| Yoshimi, Tsuyoshi| Miyake, Akira| Umeoka, Midori| Tanaka, Atsushi| Ozaki, Sho| Nakanishi, Kazuhiro| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2001-03-27 |
| 巻 | 35巻 |
| 号 | 1-2号 |
| 開始ページ | 137 |
| 終了ページ | 146 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307705 |
| JaLCDOI | 10.18926/15464 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_28_2_77.pdf |
| 著者 | 尾坂 明義| Kawamura Haruyuki| 三浦 嘉也| |
| 抄録 | Amorphous films of lead oxyfluorosilicate were prepared with a rf-sputtering technique, and the distribution profiles of the component elements and chemical states of the fluoride ions were analyzed with an X-ray photoelectron spectrometer. Si atoms with an expanded coordination, O(4)Si-F, were present near the surface, and O(3)Si-F units were present in the deeper part of the films. Electrical resistance indicated transition to a conduction state for the films containing fluoride ions, while the films were crystallized to precipitate low quartz by the irradiation of He-Ne laser of 3 mW up to 1 sec. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1994-03-15 |
| 巻 | 28巻 |
| 号 | 2号 |
| 開始ページ | 77 |
| 終了ページ | 84 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307766 |
| JaLCDOI | 10.18926/15452 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_28_2_9.pdf |
| 著者 | 榊原 精| Kanadani, Teruto| Nakagawa, K.| Yokota, Y.| |
| 抄録 | The state above the solubility temperature of GP zones of Al-3mass % Mg alloy, which has a tendency for precipitation and preprecipitation at low temperature, was studied by resistivity measurement. Homogenization treatment at high temperature reduced Mg atoms in the surface layer. After quenching from 623K, the specimen was annealed sequentially at various temperatures above the GP zone solvus. The stationary resistivity obtained in annealing at a temperature was the same irrespective of the starting state and increased with decreasing annealing temperature. No precipitation was observed in the annealing. The results are not in favor of the segregation of Mg atoms to the dislocation loops but of the short range clustering. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1994-03-15 |
| 巻 | 28巻 |
| 号 | 2号 |
| 開始ページ | 9 |
| 終了ページ | 12 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307581 |
| JaLCDOI | 10.18926/15458 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_28_2_33.pdf |
| 著者 | Wang, Ming| Ahmed, Anis| 和田 修己| 古賀 隆治| |
| 抄録 | Proposed here is a convenient optical system to collimate the crescent shaped blue laser beam radiated from a Cerenkov SHG in channel waveguide configuration. This collimation system is consisted of a parabolic mirror and has a very large tolerance to the mirror displacement. The anisotropy of the nonlinear crystal on which the waveguide is fabricated has been taken into account. The optimum mirror location is given to obtain a collimated blue laser beam with an aberration less than 0.07λ. By using an objective lens, the collimated beam can be focused down to a thin beam with the spot size less than 1μm. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1994-03-15 |
| 巻 | 28巻 |
| 号 | 2号 |
| 開始ページ | 33 |
| 終了ページ | 44 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307149 |
| JaLCDOI | 10.18926/46954 |
|---|---|
| フルテキストURL | mfe_38_1-2_073_089.pdf |
| 著者 | Kenmochi, Yukiko| Imiya, Atsushi| |
| 抄録 | Boundary tracking and surface generation are ones of main topological topics for three-dimensional digital image analysis. However, there is no adequate theory to make relations between these different topological properties in a completely discrete way. In this paper, we present a new boundary tracking algorithm which gives not only a set of border points but also the surface structures by using the concepts of combinatorial/algebraic topologies. We also show that our boundary becomes a triangulation of border points (in the sense of general topology), that is, we clarify relations between border points and their surface structures. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2004-03 |
| 巻 | 38巻 |
| 号 | 1-2号 |
| 開始ページ | 73 |
| 終了ページ | 89 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 80016889444 |
| JaLCDOI | 10.18926/19632 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_32_7.pdf |
| 著者 | Adli| 山本 尚武| |
| 抄録 | This paper describes a new measurment method and principle of power line interference elimination in ECG signal using inverse loop and AC power line configuration (APC). First, we considered that magnetic induction effect not only depend on a conductive loop area that formed by shielded wires that connect the object and amplifier but also effect of body area effective must be considered. It is simple and useful because interference can be eliminated to very small value show that the condition and it can be applied in a real ECG signal recording. Second, results show that the contribution of displacement currents into the object especially APC in vertical configuration is smaller than it in other one. Because this method is so easy that it is convenient to be used to understand some aspects of power line interference elimination phenomenon. Hence we expect that this method can be used as one of improvement method in measurement system of ECG signal recording. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1998-04-20 |
| 巻 | 32巻 |
| 号 | 1-2号 |
| 開始ページ | 7 |
| 終了ページ | 14 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309065 |
| JaLCDOI | 10.18926/15403 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_27_2_19.pdf |
| 著者 | 奈良 重俊| 東辻 浩夫| |
| 抄録 | Numerical simulations of a single layer recurrent neural network model in which the synaptic connection matrix is formed by summing cyclic products of succesive patterns show that complex dynamics can occur with the reduction of a connectivity parameter which is the number of connection between neurons. The structure in these dynamics is discussed from the viewpoint of realizing complex function using complex dynamics. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1993-03-25 |
| 巻 | 27巻 |
| 号 | 2号 |
| 開始ページ | 19 |
| 終了ページ | 40 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307451 |
| 著者 | Faculty of Engineering, Okayama University| |
|---|---|
| 発行日 | 2013-01 |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 巻 | 47巻 |
| 資料タイプ | その他 |
| 著者 | Faculty of Engineering, Okayama University| |
|---|---|
| 発行日 | 2011-01 |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 巻 | 45巻 |
| 資料タイプ | その他 |
| 著者 | Faculty of Engineering, Okayama University| |
|---|---|
| 発行日 | 2012-01 |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 巻 | 46巻 |
| 資料タイプ | その他 |
| JaLCDOI | 10.18926/46947 |
|---|---|
| フルテキストURL | mfe_38_1-2_005_014.pdf |
| 著者 | Ishimaru, Kazuhito| Konishi, Masami| Imai, Jun| Nishi, Tatsushi| |
| 抄録 | Temperature distribution in the reactor furnace is mainly operated by gas blowing from multiple tuyeres and material charge distribution. The objective of our research is obtain the optimal profile of gas flow to control temperature distribution in the reactor furnace in the shortest possible time. We formulated the optimization problem to reduce deviation of temperature distribution from its desired one in the reactor furnace. Based on the formulation, gas blow conditions are optimized by a sequential quadratic programming method to realize the desired temperature distribution. The validity of the method was checked through numerical experiments. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2004-03 |
| 巻 | 38巻 |
| 号 | 1-2号 |
| 開始ページ | 5 |
| 終了ページ | 14 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 80016785933 |
| JaLCDOI | 10.18926/15497 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_24_2_41.pdf |
| 著者 | 東辻 浩夫| |
| 抄録 | A possibility to control the microscopic superconducting channel based on the proximity effect is theoretically shown by a simple one-dimensional analysis of de Gennes' equation for the order parameter. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1990-03-29 |
| 巻 | 24巻 |
| 号 | 2号 |
| 開始ページ | 41 |
| 終了ページ | 47 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307289 |
| JaLCDOI | 10.18926/14065 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_42_91.pdf |
| 著者 | Ryohei, Hamana| 小西 正躬| 今井 純| |
| 抄録 | Various kind of productions are made in semiconductor fabrications, where it employs the production system with multiprocesses and multiple Automated Guided Vehicles(AGVs) for transportation. It is difficult to optimize planning of production and transportation simultaneously because of the complicated flow of semifinished products. This paper describes the formulations of production scheduling, transportation routing and sequence planning of material handling system, and algorithm for simultaneous optimization of plannings by using solution space reduction and simulated annealing method. In this paper, all production system is decomposed to the production scheduling problem, transportation routing problem by AGVs and sequence planning of material handling system with managing stockers and buffers. Production scheduling problem and transportation routing problem are solved by the optimization algorithm using the decomposition routing problem. Sequence planning of material handling robot problem is solved by the algorithm using simulated annealing method. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2008-01 |
| 巻 | 42巻 |
| 号 | 1号 |
| 開始ページ | 91 |
| 終了ページ | 103 |
| ISSN | 0475-0071 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002308279 |
| JaLCDOI | 10.18926/15375 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_35_177.pdf |
| 著者 | Kanki Kunihiko| 大崎 紘一| 梶原 康博| 宗澤 良臣| Ohta Kazuharu| |
| 抄録 | The focus of this paper is on the analysis of delivery motion of human, development of an image processing method based on the motion analysis and development of the cooperative delivery robot using the image processing method. The proposed image processing method uses two cameras, and it uses a stereo reconstruction technique for measuring position and postures of hands. In addition, this image processing method recognize the number of fingers extending consciously, so the cooperative human beings could choose the kind of tool which he wants by holding out his hand in front of cameras. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2001-03-27 |
| 巻 | 35巻 |
| 号 | 1-2号 |
| 開始ページ | 177 |
| 終了ページ | 182 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307899 |
| JaLCDOI | 10.18926/15417 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_29_2_39.pdf |
| 著者 | 岡 久雄| 坂本 俊哉| Irie Takashi| |
| 抄録 | The body structures under the skin surface, such as bones and tendon, have an influence on the stiffness evaluation observed from the surface. In this case, the observed stiffness should be called an apparent stiffness. To obtain the biomechanical properties of skin itself, the influence of body structure should be removed. This study deals with the correction method of apparent viscoelasticity which calculated from apparent biomechanical impedance. This method is applied to the measured result of the forearm and the right chest to confirm its effectiveness. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1995-03-27 |
| 巻 | 29巻 |
| 号 | 2号 |
| 開始ページ | 39 |
| 終了ページ | 47 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307527 |