| JaLCDOI | 10.18926/15428 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_29_2_83.pdf |
| Author | Tsuru, Kanji| Nishiyama Chikako| Ohtsuki, Chikara| Osaka, Akiyoshi| |
| Abstract | One of the CaO,SiO(2)-based bioactive glasses(5OCaO･ 5OSiO (2) in mol%) were soaked for various periods in a simulated body fluid(SBF) with or without containing alcohols such as methanol, ethanol, and 1-propanol. Effect of the alcohols was investigated on the apatite formation on the glass surface with thin-film X-ray diffraction, FT-IR reflection spectroscopy and scanning electron microscopy. Under the presence of alcohols up to 0.1mol/l in the SBF an apatite layer was formed on the glass, while it consisted of crystallites similar in morphology but larger in size than that found for the SBF without the alcohols. It was concluded that the alcohols little influenced the the apatite forming ability of the CaO,SiO(2)-based glasses. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1995-03-27 |
| Volume | volume29 |
| Issue | issue2 |
| Start Page | 83 |
| End Page | 88 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307301 |
| JaLCDOI | 10.18926/15426 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_29_2_77.pdf |
| Author | Tsuru, Kanji| Nishiyama Chikako| Ohtsuki, Chikara| Osaka, Akiyoshi| |
| Abstract | Poly(methyl methacrylate) substrates were immersed in suspensions containing bioactive 50CaO･50SiO(2) (mol%) glass particles (45 μm in diameter) and a 6:4 (volume fraction) mixture of ethanol and THF, and an ultrasonic energy was applied to the system. A layer of glass particles was implanted and covered more than 50% of the substrate surface. Thin film X-ray diffraction patterns and FT-IR reflection spectra indicated deposition of apatite on the glass-implanted substrates after they were soaked for 12 h in a simulated body fluid similar in apatite-deposition ability to the human blood plasma. Flake-like apatite crystallites formed on the substrate soaked in SBF for 3 days. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1995-03-27 |
| Volume | volume29 |
| Issue | issue2 |
| Start Page | 77 |
| End Page | 81 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307332 |
| JaLCDOI | 10.18926/46946 |
|---|---|
| FullText URL | mfe_38_1-2_001_004.pdf |
| Author | Sakakibara, Akira| Kanadani, Teruto| |
| Abstract | The relationship between occurrence of serration and reversion heat treatment was studied by tensile test on Al-10mass%Zn alloy. Serration was observed for the furnace cooled specimen, but not for the as-quenched one and the shortly aged one, which result is difficult to be interpreted by the Cottrell theory. The stress amplitude in the serration increased with increasing the time of annealing for reversion up to 10ks and then stayed at a constant value which might be interpreted by the Cottrell theory. The stress amplitude in the serration decreased with increasing the annealing temperature, which is contrary to the prediction by the Cottrell theory. The specimen directly annealed without aging and the one annealed after aging agreed well with each other in the tensile strength and the stress amplitude in the serration, which suggests solute clusters as the cause of serration. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2004-03 |
| Volume | volume38 |
| Issue | issue1-2 |
| Start Page | 1 |
| End Page | 4 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 80016785932 |
| JaLCDOI | 10.18926/14125 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_40_1_78.pdf |
| Author | Funabiki, Nobuo| Isogai, Megumi| Higashino, Teruo| Oda Masashi| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2006-01 |
| Volume | volume40 |
| Issue | issue1 |
| Start Page | 78 |
| End Page | 82 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002308500 |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2013-01 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume47 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2012-01 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume46 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2002-03 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume36 |
| Issue | issue2 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2002-03 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume36 |
| Issue | issue2 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2001-12 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume36 |
| Issue | issue1 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2001-12 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume36 |
| Issue | issue1 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2003-03 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume37 |
| Issue | issue2 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2003-03 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume37 |
| Issue | issue2 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2002-11 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume37 |
| Issue | issue1 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2002-11 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume37 |
| Issue | issue1 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2004-03 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume38 |
| Issue | issue1-2 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2004-03 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume38 |
| Issue | issue1-2 |
| Content Type | Others |
| Author | Faculty of Engineering, Okayama University| |
|---|---|
| Published Date | 2011-01 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume45 |
| Content Type | Others |
| JaLCDOI | 10.18926/49320 |
|---|---|
| FullText URL | mfe_047_001_018.pdf |
| Author | Kanatani, Kenichi| |
| Abstract | We summarize techniques for optimal geometric estimation from noisy observations for computer vision applications. We first discuss the interpretation of optimality and point out that geometric estimation is different from the standard statistical estimation. We also describe our noise modeling and a theoretical accuracy limit called the KCR lower bound. Then, we formulate estimation techniques based on minimization of a given cost function: least squares (LS), maximum likelihood (ML), which includes reprojection error minimization as a special case, and Sampson error minimization. We describe bundle adjustment and the FNS scheme for numerically solving them and the hyperaccurate correction that improves the accuracy of ML. Next, we formulate estimation techniques not based on minimization of any cost function: iterative reweight, renormalization, and hyper-renormalization. Finally, we show numerical examples to demonstrate that hyper-renormalization has higher accuracy than ML, which has widely been regarded as the most accurate method of all. We conclude that hyper-renormalization is robust to noise and currently is the best method. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2013-01 |
| Volume | volume47 |
| Start Page | 1 |
| End Page | 18 |
| ISSN | 1349-6115 |
| language | 英語 |
| Copyright Holders | Copyright © by the authors |
| File Version | publisher |
| NAID | 120005232372 |
| JaLCDOI | 10.18926/48126 |
|---|---|
| FullText URL | mfe_046_010_020.pdf |
| Author | Kanatani, Kenichi| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2012-01 |
| Volume | volume46 |
| Start Page | 10 |
| End Page | 20 |
| ISSN | 1349-6115 |
| language | 英語 |
| Copyright Holders | Copyright © by the authors |
| File Version | publisher |
| NAID | 80022451621 |
| JaLCDOI | 10.18926/47026 |
|---|---|
| FullText URL | mfe_36_2_061_066.pdf |
| Author | Yamagiwa, Masashi| Namba, Akitoshi| Akao, Tetsuyuki| Mizuki, Eiichi| Ohba, Michio| Sakai, Hiroshi| |
| Abstract | The crystal proteins produced by Bacillus thuringiensis subsp, israelensis (Bti) and subsp. coreanensis A1519 strain were examined for the cytotoxicity against MOLT-4 and HeLa cells by MTT assay and LDH assay, The A1519 crystal proteins processed by proteinase K exhibited the specific cell-killing activity toward MOLT-4 with little damage to the cell membrane, On the other hand, the Bti crystal proteins processed by proteinase K caused the substantial damage to the cell membrane of both MOLT-4 and HeLa, leading to the cell lysis. The non-digested crystal proteins of both strains exhibited no cytotoxicity, These data suggested that while the Bti crystal proteins caused the colloid-osmotic swelling and cell lysis of MOLT-4 and HeLa, the proteinase K-digested A1519 crystal proteins induced the specific cell death of MOLT-4 through a mechanism other than that of Bti. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2002-03 |
| Volume | volume36 |
| Issue | issue2 |
| Start Page | 61 |
| End Page | 66 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 80015582224 |
