| 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 | 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 | 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 | 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 | 2013-01 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume47 |
| Content Type | Others |
| 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 |
| 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 | 10.18926/15426 |
|---|---|
| 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 | 10.18926/15428 |
|---|---|
| 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 | 10.18926/15459 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_23_1_31.pdf |
| Author | Miura, Yoshinari| Yuasa Motokazu| Osaka, Akiyoshi| Takahashi, Katsuaki| |
| Abstract | Sodium borosilicate gels of compositions similar to that of Vycor(R) glass like 80SiO(2).15B(2)O(3).5Na(2)O(wt%) were prepared from hydrolysis and polycondensation of tetraethyl orthosilicate, trimethyl borate, and sodium methylate under the HCl catalysis. Variation of the gelation time is examined as a function of the mixing ratio of the starting materials and the catalyst. The thermal behavior of the gels has been discussed on the basis of their TG and DTA traces. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1988-11-22 |
| Volume | volume23 |
| Issue | issue1 |
| Start Page | 31 |
| End Page | 38 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307464 |
| JaLCDOI | 10.18926/15462 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_23_1_39.pdf |
| Author | Osaka, Akiyoshi| Yuasa Motokazu| Miura, Yoshinari| Takahashi, Katsuaki| |
| Abstract | Sodium borosilicate gels of compositions similar to that of Vycor(R) glass like 80SiO(2).15B(2)O(3).5Na(2)O (wt%) were prepared from hydrolysis and polycondensation of metal alkoxides under the HCl catalysis. Variation of specific surface area and porosity with temperature indicated that closed pores were opened below 400℃, and collapsed above 450℃ after the porosity reached a maximum value around 450℃. The structural evolution was examined due to IR spectra and a phase separation in the gels was observed. The solubility of the gels into 1N-HCl was studied as a function of the treatment temperature. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1988-11-22 |
| Volume | volume23 |
| Issue | issue1 |
| Start Page | 39 |
| End Page | 48 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307518 |
| JaLCDOI | 10.18926/15464 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_28_2_77.pdf |
| Author | Osaka, Akiyoshi| Kawamura Haruyuki| Miura, Yoshinari| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1994-03-15 |
| Volume | volume28 |
| Issue | issue2 |
| Start Page | 77 |
| End Page | 84 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307766 |
| JaLCDOI | 10.18926/15473 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_26_2_61.pdf |
| Author | Osaka, Akiyoshi| Kawabata Kouji| Nanba, Tokuro| Takada, Jun| Miura, Yoshinari| |
| Abstract | Mullite-dispersed silica ceramics were prepared through sol-gel processing by the use of tetraethoxy silane, aluminium nitrate and aluminium isopropoxide as the Si and Al sources where HCl and HN0(3) were the catalyst. Effect of the starting materials, solvents and catalysts was examined on the gelation time or temperature of mullite precipitation. Apparent activation energy of gelation ranged from 80 to 95kJ/mol. The presence of AI in the sols elongated the gelling time suggesting the formation of chelate bonds between AI and Si-OR or Si-OH bonds. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1992-03-28 |
| Volume | volume26 |
| Issue | issue2 |
| Start Page | 61 |
| End Page | 67 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307416 |
| JaLCDOI | 10.18926/15474 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_24_1_53.pdf |
| Author | Osaka, Akiyoshi| Takao Seiji| Oda, Kiichi| Takada, Jun| Miura, Yoshinari| |
| Abstract | Electrical resistance and X-ray photoelectron depth profile analysis are studied for antimony doped tin oxide films developed on silica, alkali-free and sodalime slide glass substrates. The sodium ions diffused from the substrates to the films prevented the crystal growth of rutile type tin oxide in the film, resulting in the high electrical resistance. A diffusion layer has been detected for each film with diffuse profiles of multi valent cations (Sn, Si or Ca) at the interface of the tin oxide film and substrate. A greater amount of sodium atoms have been detected in the film developed on the soda-lime glass while almost no sodium atoms have been found in those on the other substrates. This can be explained by the diffusion of the sodium ions in the substrate due to a drastic hydronium-sodium exchange mechanism under highly acidic conditions during the dipping and drying processes. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1989-11-29 |
| Volume | volume24 |
| Issue | issue1 |
| Start Page | 53 |
| End Page | 61 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307279 |
| JaLCDOI | 10.18926/15486 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_25_1_23.pdf |
| Author | Miura, Yoshinari| Takada, Jun| Osaka, Akiyoshi| Kawamura, Toshio| |
| Abstract | Zinc oxide films were prepared on silica glass substrates by the use of an r.f. activated reactive evaporation (ARE) method, and were examined by X-ray diffraction (XRD) and scanning electron micrograph (SEM). XRD measurements indicate that the films were c-axis oriented and that an r.f. plasma of Zn and O was necessary for the ZnO film deposition. Substrate temperature, oxygen gas pressure, evaporation rate, r.f. power and inlet position of oxygen gas effect the c-axis orientation, the growth rate and the microstructure of the films. Optimum conditions for a dense film with a fine texture of the surface and having good crystallinity were as follows: the substrate temperature;400℃, the evaporation rate;5.0(A)/s, the oxygen pressure;2.0x10(-4) Torr, the r.f. power;150 to 200W, and the oxygen gas inlet near the substrate. For the film prepared under the optimum conditions, the standard deviation σ of the rocking curve for the (002) diffraction was 1.9deg, smaller than that of the film prepared by using an r.f. sputtering method. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1990-12-14 |
| Volume | volume25 |
| Issue | issue1 |
| Start Page | 23 |
| End Page | 35 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307600 |
| JaLCDOI | 10.18926/15398 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_27_1_93.pdf |
| Author | Nishigaki, Makoto| Sudinda Teddy| Hishiya Tomoyuki| Kohno, Ichiro| |
| Abstract | In this paper the author will be describe phenomena of advection dispersion in subsurface flow by using Eulerian Lagrangian Finite Element Method. Where Finite Element Method with Galerkin formulation and weigthed residual method is used to solve seepage and advection dispersion equation. The problem of one dimensional and two dimensional rectangular wave are analyzed in this paper. And the result of numerical analyses will be compared with analytical solutions. The numerical results showed the very good agreement with the analytical solutions. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1992-11-25 |
| Volume | volume27 |
| Issue | issue1 |
| Start Page | 93 |
| End Page | 105 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307768 |
| JaLCDOI | 10.18926/15440 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_28_1_71.pdf |
| Author | Nishigaki, Makoto| Sudinda Teddy| Hishiya Tomoyuki| Kohno, Iichiro| |
| Abstract | In this paper, method of Eulerian Lagrangian numerical analysis is used to described Advection-Dispersion phenomena. The influence of concentration to the density of fluid is considered. A laboratory model of a two dimensional confined aquifer containing an isotropic, homogeneous porous medium (Hosokawa et.al 1989) was used to validate the applicability of Advection-Dispersion of numerical analysis with steady and unsteady state condition [1]. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1993-11-30 |
| Volume | volume28 |
| Issue | issue1 |
| Start Page | 71 |
| End Page | 85 |
| ISSN | 0475-0071 |
| language | 英語 |
| File Version | publisher |
| NAID | 120002307975 |
