| 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 | 2002-11 |
| 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 | 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 | 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 | 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 | 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 | 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 | 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 | 2002-03 |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Volume | volume36 |
| Issue | issue2 |
| Content Type | Others |
| JaLCDOI | 10.18926/15402 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_30_2_27.pdf |
| Author | Totsuji, Hiroo| Kishimoto, Tokunari| Totsuji, Chieko| |
| Abstract | The behavior of the Yukawa system in external one-dimensional force fields is analyzed by the molecular dynamics simulation. The formation of layered structures at low temperatures is observed and the relation between the number of layers and characteristic parameters of the system is obtained. Since the Yukawa system serves as a model of clouds of dust particles in plasmas (dusty plasma) which play an important role in plasma processes of semiconductor engineering, the results may be useful to control the quality of semiconductor wafers in such processes. In simulations, periodic boundary conditions are imposed in two dimensions and deformations of periodic boundaries are allowed in order to reduce the effect of boundaries without giving too much constraint on the symmetry. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1996-03-29 |
| Volume | volume30 |
| Issue | issue2 |
| Start Page | 27 |
| End Page | 37 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307582 |
| JaLCDOI | 10.18926/15503 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_25_2_9.pdf |
| Author | Mikuni, Masato| Hida, Moritaka| Nishida, Norihide| Sakakibara, Akira| Yamada, Masuo| |
| Abstract | Strains induced in the Si substrates by TiN film were observed with X-ray topography. The image of the sample with TiN film 0.45μm thick was like that of a dislocation loop observed with transmission electron microscope. The images of the samples with TiN films 1.65, and 1.9μm thick were different; blackening spreaded in the <112> and <110> direction from the ring contrast in shape of four-lobed rosette pattern. Spreading extended 1.6 times longer than the radius of the ring contrast along the <112> direction. The strain field extended 0.1μm in depth from the top surface where TiN was plated. From the topographs of bent Si beam, it was found that the blackness was almost proportional to the strain. The strains induced by TiN film locally ion-plated were smaller than those observed previously when TiN was ion-plated on the whole top surface of the substrate. Fine structures were observed in the topographs which could not be explained by the kinematical theory. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1991-03-28 |
| Volume | volume25 |
| Issue | issue2 |
| Start Page | 9 |
| End Page | 15 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307429 |
| JaLCDOI | 10.18926/15453 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_28_2_13.pdf |
| Author | Kusumoto, Hisao| Hida, Moritaka| Sakakibara, Akira| Nishida, Norihide| Takemoto, Yoshito| Yamada, Masuo| |
| Abstract | The strain in Si substrate induced by locally ion-plated thin film of TiN was observed by X-ray topograph (Lang technique). Circular TiN film was deposited on one side of the Si surface. In all topographs the highest blackness attributed to kinematical diffraction effect occurred at the film edge. Rosette pattern with four-lobes was observed around the film. Blackness as a whole increased with the film thickness. Strain was observed in the depth direction of substrate by limited projection method. When the slit width was narrowed, the kinematical images disappeared, and white images appeared at the film edge. All the contrast disappeared when the TiN film was completely removed in boiling HNO(3). The strain induced by the film deposition was proved to be elastic. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1994-03-15 |
| Volume | volume28 |
| Issue | issue2 |
| Start Page | 13 |
| End Page | 20 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307150 |
| JaLCDOI | 10.18926/15469 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_23_2_1.pdf |
| Author | Kamiyabu, Hideto| Sakakibara, Akira| Maeda, Hironobu| Hida, Moritaka| |
| Abstract | Surface tension (γ(L)) and contact angle (θ) of gallium related to wettability on Teflon and other substrates (Al(2)O(3), SiO(2), glass, graphite, BN, AI, Ni, As etc.) were investigated. The values of Teflon were 0.70(6)N/m and 158° in pure argon atmosphere, and the ones of other substrates were listed in a table in this text. We were interested especially in the relative values, γ(L)'s, on the substrates as compared with γ(L) on Teflon substrate. Liquid Ga showed spreading wetting on pure Ni metal and adhesional wetting on Al (supposed to be covered by A1(2)O(3)) and on metallic polycrystal As. Surface tension of Ga was remarkably decreased by a kind of oxide contamination due to oxygen in air. The surface layer coated by the contamination was of amorphous state nearly same as liquid Ga. The amorphous coat caused liquid Ga rather high supercooling of △T~35K. It seems that the contamination layer (oxide fi1m) smeared the crystal nucleation sites on the free surface of liquid Ga |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1989-03-30 |
| Volume | volume23 |
| Issue | issue2 |
| Start Page | 1 |
| End Page | 8 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307294 |
| JaLCDOI | 10.18926/14058 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_42_44.pdf |
| Author | Ogawa Takafumi| Tsuruta, Kenji| Totsuji, Chieko| Totsuji, Hiroo| Hiroshi Iyetomi| |
| Abstract | To analyze vibrational properties of Si crystal with a single charge-neutral vacancy, we perform large-scale simulations based on tight-binding molecular-dynamics method. Vibrational modes and frequencies are obtained by diagonalizing dynamical matrix within a harmonic approximation. Results indicate that there exist vibrational modes spatially localized around the vacancy and large frequency shifts associated with the localized modes contribute significantly to reduction of the vibrational free energy. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2008-01 |
| Volume | volume42 |
| Issue | issue1 |
| Start Page | 44 |
| End Page | 47 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308412 |
| JaLCDOI | 10.18926/15421 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_26_1_75.pdf |
| Author | Myojin Sho| Noguchi Hisahumi| Yamada Masahito| |
| Abstract | Four radials-single ring urban expressway network is priced and, simultaneously, optimized in its spatial formation under the constraint that a balance must be kept of revenue and expenditure. The model consists of three sub-models: road system, car trip generation-attraction and traffic diversion. Network performance is assessed on two criteria; trip number criterion on which the aggregate number of car trips diverted onto expressway is maximized and travel hour criterion on which the travel hours of car trips integrated over the road system; surface and expressway, is minimized. Optimization is tried by numerical calculation for some sets of parameters in the model. The results are summarized as follows; (1) simultaneous optimization of price and spatial formation of the expressway network is possible on each of criteria, (2) trip number criterion produces lower pricing and smaller network while travel hour criterion does higher pricing and larger network, (3) optimum solution lies in a delicate relation of price and spatial network formation that comes from the balance constraint. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1991-11-30 |
| Volume | volume26 |
| Issue | issue1 |
| Start Page | 75 |
| End Page | 94 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307318 |
| JaLCDOI | 10.18926/19955 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_44_13.pdf |
| Author | Kanatani, Kenichi| Sugaya Yasuyuki| |
| Abstract | A new numerical scheme is presented for computing strict maximum likelihood (ML) of geometric fitting problems having an implicit constraint. Our approach is orthogonal projection of observations onto a parameterized surface defined by the constraint. Assuming a linearly separable nonlinear constraint, we show that a theoretically global solution can be obtained by iterative Sampson error minimization. Our approach is illustrated by ellipse fitting and fundamental matrix computation. Our method also encompasses optimal correction, computing, e.g., perpendiculars to an ellipse and triangulating stereo images. A detailed discussion is given to technical and practical issues about our approach. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2010-01 |
| Volume | volume44 |
| Start Page | 13 |
| End Page | 23 |
| ISSN | 1349-6115 |
| language | English |
| File Version | publisher |
| NAID | 120002309170 |
| JaLCDOI | 10.18926/46952 |
|---|---|
| FullText URL | mfe_38_1-2_039_059.pdf |
| Author | Kanatani, Kenichi| |
| Abstract | 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. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2004-03 |
| Volume | volume38 |
| Issue | issue1-2 |
| Start Page | 39 |
| End Page | 59 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 80016889442 |
| JaLCDOI | 10.18926/14123 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_40_1_53.pdf |
| Author | Kanatani, Kenichi| Sugaya, Yasuyuki| Hanno Ackermann| |
| Abstract | In order to reconstruct 3-D Euclidean shape by the Tomasi-Kanade factorization, one needs to specify an affine camera model such as orthographic, weak perspective, and paraperspective. We present a new method that does not require any such specific models. We show that a minimal requirement for an affine camera to mimic perspective projection leads to a unique camera model, which we call a symmetric affine camera, which has two free functions. We determine their values from input images by linear computation and demonstrate by experiments that an appropriate camera model is automatically selected. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2006-01 |
| Volume | volume40 |
| Issue | issue1 |
| Start Page | 53 |
| End Page | 63 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002308664 |
| 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 | English |
| File Version | publisher |
| NAID | 120002307332 |
