JaLCDOI 10.18926/46980
フルテキストURL mfe_37_2_061_066.pdf
著者 Vaillancourt, Chico|
抄録 In this case study, I will analyse and discuss the results of a survey concerning motivation towards learning a second language conducted in one Danish high school. The students surveyed were between the ages of 13-18. This section, part two of the study, was conducted in Copenhagen, Denmark. This region of the world was chosen because bilingualism is quite common there and a large portion of the school-aged community is learning a second language and often a third and even a fourth. Denmark, a European country, is different than Canada (Case Study-Part 1.) because it neighbours many countries, which use different mother tongues.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2003-03
37巻
2号
開始ページ 61
終了ページ 66
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120003457333
JaLCDOI 10.18926/46981
フルテキストURL mfe_37_2_067_072.pdf
著者 Yamagiwa, Masashi| Sakai, Hiroshi|
抄録 An active form of Cry4A is a heterodimer of the 20- and 45-kDa fragments that are derived from the 130-kDa Cry4A protoxin. To investigate the function of these two fragments, several deletion mutants were constructed and expressed in E.coli as the GST (glutathione-S-transferase) fusion proteins. The results of the bioassay against Culex pipiens larvae showed that the interaction of two fragments of Cry4A was necessary for the toxicity, and that the C-terminal 67 amino acids of the 20-kDa fragment corresponding to the helices α4 and α5 were involved in determining the insecticidal activity. Surprisingly the lack of helix α5 did not affect the toxicity to C. pipiens, suggesting that the role of helix α5 of Cry4A was different from that postulated in the case of Cry4A toxins.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2003-03
37巻
2号
開始ページ 67
終了ページ 72
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80016019143
JaLCDOI 10.18926/46996
フルテキストURL mfe_36_1_007_016.pdf
著者 Li, Yan| Abe, Takeji| Tada, Naoya| Kanazawa, Masanori|
抄録 The change in the surface morphology of polycrystalline titanium during tensile plastic deformation is studied, using the scanning probe microscope as well as the laser scanning microscope. The observation shows that the slip occurs mainly near grain boundary at the strain range of ε < 0.05. The slip develops with the applied strain, and the slip on the second slip system or the crossing of slip lines appear. The surface roughness increases linearly with the applied strain. The height difference between the grain boundary area and the inner grain area also increases with the applied strain, though the increase rate becomes low after the applied strain of about 0.3. The nano-scale height difference of the surface step of slip lines increases with the applied strain, though it remains almost constant after the applied strain of 0.4. The averaged surface roughness measured with the scanning probe microscope is in good agreement with that measured with the laser scanning microscope.
キーワード Plasticity Polycrystalline Titanium Tensile Deformation Surface Morphology Slip Twin Probe Scanning Microscope Laser Scanning Microscope
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-12
36巻
1号
開始ページ 7
終了ページ 16
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80012831215
JaLCDOI 10.18926/46997
フルテキストURL mfe_36_1_017_028.pdf
著者 Endo, Shinichiro| Konishi, Masami|
抄録 Small Scale Hydroelectric Power Generation is made using the water drop caused by the gradient difference between that of the river and that of the penstock. The water flow in this system apt to vary with time. Especially, at the time of the flood or that of the dry, the flow in the water stream varies largely. To realize the stable generation, it is necessary to maintain the water level in the head tank located in the mid way in the stream channel at a constant level. In this paper, variation of water level is forecasted using two-tank model for the penstock and the head tank and the water level control algorithm is proposed by deadbeat control. The effectiveness of the algorithm is evaluated beforehand using the simulation program of the water environment for the hydroelectric generation system.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-12
36巻
1号
開始ページ 17
終了ページ 28
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120003497023
JaLCDOI 10.18926/46998
フルテキストURL mfe_36_1_029_039.pdf
著者 Imai, Jun| Wada, Kiyoshi|
抄録 A procedure for control-oriented modeling is proposed for large flexible structures with unknown modal parameters. Techniques on quantification of errors in modal truncated nominal models are developed for the case where a finite number of upper and lower bounds of the unknown modal parameters are given. A feasible set of systems matching the conditions is introduced, and then error bounds covering the feasible set are established in the frequency domain. The bounds are easily checked using linear programming for any user-specified frequency. The feasibility of the proposed scheme is illustrated by numerical study on an ideal flexible beam example.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-12
36巻
1号
開始ページ 29
終了ページ 39
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80012887118
JaLCDOI 10.18926/47000
フルテキストURL mfe_36_1_051_057.pdf
著者 Vaillancourt, Chico|
抄録 This is a brief essay on using kinesthetic approaches to learning English as a second language. In the essay, I briefly discuss teaching philosophy and 2 small-scale Technical Engineering projects that I have introduced and completed with my 4(th) year engineering students in the spring of 2001.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-12
36巻
1号
開始ページ 51
終了ページ 57
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120003497026
JaLCDOI 10.18926/47001
フルテキストURL mfe_36_1_059_077.pdf
著者 Kanatani, Kenichi|
抄録 Contrasting "geometric fitting", for which the noise level is taken as the asymptotic variable, with "statistical inference", for which the number of observations is taken as the asymptotic variable, we give a new definition of the "geometric AIC" and the "geometric MDL" as the counterparts of Akaike's AIC and Rissanen's MDL. We discuss various theoretical and practical problems that emerge from our analysis. Finally, we show, doing experiments using synthetic and real images, that the geometric MDL does not necessarily outperform the geometric AIC and that the two criteria have very different characteristics.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-12
36巻
1号
開始ページ 59
終了ページ 77
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80012855281
JaLCDOI 10.18926/47002
フルテキストURL mfe_36_1_079_090.pdf
著者 Kanatani, Kenichi|
抄録 We first present an improvement of Kanatani's subspace separation [8] for motion segmentation by newly introducing the affine space constraint. We point out that this improvement does not always fare well due to the effective noise it introduces. In order to judge which solution to adopt if different segmentations are obtained, we present two criteria: one is the standard F test; the other is model selection using the geometric AIC of Kanatani [7] and the geometric MDL of Matsunaga and Kanatani [13]. We test these criteria doing real image experiments.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-12
36巻
1号
開始ページ 79
終了ページ 90
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120003497028
JaLCDOI 10.18926/47003
フルテキストURL mfe_36_1_091_106.pdf
著者 Kanatani, Kenichi| Ohta, Naoya|
抄録 We present a theoretically optimal linear algorithm for 3-D reconstruction from point correspondences over two views. We also present a similarly constructed optimal linear algorithm for 3-D reconstruction from optical flow. We then compare the performance of the two algorithms by simulation and real-image experiments using the same data. This is the first impartial comparison ever done in the sense that the two algorithms are both optimal, extracting the information contained in the data to a maximum possible degree. We observe that the finite motion solution is always superior to the optical flow solution and conclude that the finite motion algorithm should be used for 3-D reconstruction.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-12
36巻
1号
開始ページ 91
終了ページ 106
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120003497029
JaLCDOI 10.18926/47004
フルテキストURL mfe_36_1_107_116.pdf
著者 Kanatani, Kenichi| Ohta, Naoya|
抄録 We present a new method for automatically detecting circular objects in images: we detect an osculating circle to an elliptic arc using a Hough transform, iteratively deforming it into an ellipse, removing outlier pixels, and searching for a separate edge. The voting space is restricted to one and two dimensions for efficiency, and special weighting schemes are introduced to enhance the accuracy. We demonstrate the effectiveness of our method using real images. Finally, we apply our method to the calibration of a turntable for 3-D object shape reconstruction.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-12
36巻
1号
開始ページ 107
終了ページ 116
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80012855284
JaLCDOI 10.18926/47021
フルテキストURL mfe_36_2_001_006.pdf
著者 Sakakibara, Akira| Kanadani, Teruto| Tashiro, Tsutomu| Yoshioka, Kazumi|
抄録 The effect of heat-treatment conditions on occurrence of serration in Al-Zn alloys was investigated. Specimens were aged for various times up to 2.6Ms at 293K or 273K after quenching from various temperatures (T(Q)), 473K to 853K, and tensile-tested at room temperature. Serration occurred more easily according as T(Q) became lower and the aging time became shorter: in the case that T(Q)=473K serration was observed even after aging for 2.6Ms, while in the case that T(Q)=773K serration did not occur irrespective of aging conditions. Serration was also recognized when the specimens were furnace-cooled from 773K to room temperature. These results together with those obtained by the electrical resistometry suggest that the serration in the low'concentrated Al-Zn alloy is caused by the formation of small GP zones whose Guinier radius is less than 1nm or some sort of solute clusters.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2002-03
36巻
2号
開始ページ 1
終了ページ 6
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80015497758
JaLCDOI 10.18926/47022
フルテキストURL mfe_36_2_007_013.pdf
著者 Abe, Takeji| Nagao, Makoto| Ohta, Tomoyuki| Nagayama, Noriyuki|
抄録 It is important to study the microscopic deformation behavior of inhomogeneous material, for most engineering materials are inhomogeneous. The aim of the present study is to clarify by numerical analysis some features of microscopic plastic strain distributions, the mean flow stress and the material factors affecting on it. The rigid-plastic solution is important not only for plastic deformation problems with large strain, but also for creep deformation problems through the plastic analogy in the creep analysis. The effects of material parameter and loading conditions on the deformation behavior of the material are examined and discussed based on the result of calculation. The effects of the aspect ratio of the inhomogeneous regions on the deformation mode are studied. The patterns of the strain concentration and the averaged flow stress of the inhomogeneous material are also discussed. The results of rigid-plastic material are compared with those of the elastic material.
キーワード Plasticity Deformation Inhomogeneous Material Strain Concentration Coefficient Rigid-Plastic FEM
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2002-03
36巻
2号
開始ページ 7
終了ページ 13
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120003497044
JaLCDOI 10.18926/47023
フルテキストURL mfe_36_2_015_042.pdf
著者 Ohtani, Ryuji| Konishi, Masami| Imai, Jun| Nishi, Tatsushi|
抄録 In this paper, we studied a planning and scheduling of production system considering demand changes. In the proposed system, planning part determines lot-size and amount of jobs in production. On the other hand, scheduling part determines the production sequence of jobs. In order to treat with the demand changes, both planning and scheduling should work well simultaneously. In the proposed system, preset and real time production control system is newly constructed from the view point of adaptive control. In the system, production planning is modified when the difference between production amount and demand becomes large. Moreover, production schedule is regenerated when the determined schedule is deviated from the prospected one. The scheduling system is characterized as the autonomous decentralized optimization system where each job works as agent and agent searches its appropriate starting time of processing. The effectiveness of the proposed system is confirmed by numerical examples.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2002-03
36巻
2号
開始ページ 15
終了ページ 42
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80015471209
JaLCDOI 10.18926/47024
フルテキストURL mfe_36_2_043_049.pdf
著者 Vaillancourt, Chico|
抄録 In this case study, I will analyse and discuss the results of a survey concerning motivation towards learning a second language conducted in four Canadian schools. This section, part one of the study, was conducted in the Sudbury Region of Ontario, Canada. This region of the world was chosen because bilingualism is quite common there and a large portion of the community has learned a second language. Part two will be conducted in the winter of 2002, in Denmark, a European country that neighbours many countries with different mother tongues, I hope to conclude this case study with part three in the summer of 2002, in Japan, a monolingual island nation.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2002-03
36巻
2号
開始ページ 43
終了ページ 49
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120003497045
JaLCDOI 10.18926/47026
フルテキストURL mfe_36_2_061_066.pdf
著者 Yamagiwa, Masashi| Namba, Akitoshi| Akao, Tetsuyuki| Mizuki, Eiichi| Ohba, Michio| Sakai, Hiroshi|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2002-03
36巻
2号
開始ページ 61
終了ページ 66
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80015582224
JaLCDOI 10.18926/14125
フルテキストURL Mem_Fac_Eng_OU_40_1_78.pdf
著者 船曳 信生| 磯貝 愛| 東野 輝夫| Oda Masashi|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2006-01
40巻
1号
開始ページ 78
終了ページ 82
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308500
JaLCDOI 10.18926/46946
フルテキストURL mfe_38_1-2_001_004.pdf
著者 Sakakibara, Akira| Kanadani, Teruto|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2004-03
38巻
1-2号
開始ページ 1
終了ページ 4
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 80016785932
JaLCDOI 10.18926/15426
フルテキストURL Mem_Fac_Eng_OU_29_2_77.pdf
著者 都留 寛治| Nishiyama Chikako| 大槻 主税| 尾坂 明義|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1995-03-27
29巻
2号
開始ページ 77
終了ページ 81
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307332
JaLCDOI 10.18926/15428
フルテキストURL Mem_Fac_Eng_OU_29_2_83.pdf
著者 都留 寛治| Nishiyama Chikako| 大槻 主税| 尾坂 明義|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1995-03-27
29巻
2号
開始ページ 83
終了ページ 88
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307301
JaLCDOI 10.18926/15459
フルテキストURL Mem_Fac_Eng_OU_23_1_31.pdf
著者 三浦 嘉也| Yuasa Motokazu| 尾坂 明義| 高橋 克明|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1988-11-22
23巻
1号
開始ページ 31
終了ページ 38
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307464