| JaLCDOI | 10.18926/15432 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_28_1_1.pdf |
| 著者 | 奈良 重俊| Miho Shigeru| 東辻 浩夫| |
| 抄録 | The structural stabilities of bulk Si, Ge, and GaAs are discussed based on the total energy evaluated by the summation of the band structure energy and the short-range repulsive potential between ions. The band structure energy is calculated by means of the simple tight-binding method. The tight-binding parameters are determined so as to fit to the results of a pseude potential calculation and Harrison's model is employed to include the influence of lattice deformation. The short-range-force is assumed to be of the exponential form and parameters are determined so as to reproduce an experimental value of bulk modulus. This treatment qualitatively well describes structural properties in spite of the simple computational procedure and roughly gives the known variation of the total energy for a <100> uniaxial strain. This method is able to be applied to an investigation of the structural stabilities of superlattices, for example, a strained layer superlattice consisting of hetero-semiconductors. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1993-11-30 |
| 巻 | 28巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 25 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307238 |
| JaLCDOI | 10.18926/15435 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_28_1_39.pdf |
| 著者 | 東辻 千枝子| Matsubara Takeo| |
| 抄録 | There are some substances in which their hydrogen bonds are considered to play quite important roles in their ferroelectric or antiferroelectric phase transition. These ferroelectrics usually have large isotope effects in phase transition temperatures and we expect the physics of hydrogen bonds is closely related to the effects. We propose a simple model describing the isolated hydrogen bond. Based on quantum-mechanical analyses of this model, we study the difference between the behavior of a proton and a deuteron in hydrogen bonds. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1993-11-30 |
| 巻 | 28巻 |
| 号 | 1号 |
| 開始ページ | 39 |
| 終了ページ | 50 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307179 |
| JaLCDOI | 10.18926/15405 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_30_2_39.pdf |
| 著者 | 東辻 千枝子| |
| 抄録 | A simple model for oxygen ion conduction in perovskite compounds is proposed. The potential for an oxygen ion is calculated as the sum of the long range Coulomb potential and short range repulsive potential in a cubic lattice. The activation energy is estimated as the difference in the values of potential at the barrier and at the stable site. When appropriate conditions are satisfied, the activation energy has a minimum as a function of lattice constant in accordance with recent experiments. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1996-03-29 |
| 巻 | 30巻 |
| 号 | 2号 |
| 開始ページ | 39 |
| 終了ページ | 43 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307769 |
| JaLCDOI | 10.18926/19692 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_33_2_111.pdf |
| 著者 | Fujihara Yutaka| 宗澤 良臣| 大崎 紘一| |
| 抄録 | Our country faces a serious problem of the environmental pollution by the production and the large quantity consumption of the industry product. The thoroughness of resources recycling has become necessary to solve these problems. As for the product design and the production control, how productivity should be improved has been discussed with extreme emphasis. But from now, as for the product design, both assemblability and disassemblability must be taken into consideration at the same time. And also in production management, it must be investigated how the products can be recycled in the low cost. Therfore, the facility layout method with two phases in recycling plant, which is composed of both the procedure for the layout of facility group and the procedure for the layout of intermal facility group by the optimal solution method and the suboptimal solution method by neural network is proposed in this paper. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1999-04-27 |
| 巻 | 33巻 |
| 号 | 2号 |
| 開始ページ | 111 |
| 終了ページ | 119 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309035 |
| JaLCDOI | 10.18926/19610 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_33_1_31.pdf |
| 著者 | Iwamoto Hidehisa| 大崎 紘一| 梶原 康博| 宗澤 良臣| Hashimoto Atsufumi| 関 州二| |
| 抄録 | The nurse supporting robot system to prepare and hand surgical instruments to a surgeon is proposed to reduce work of nurse in a surgical operation. In this paper, the surgical instrument recognition system (SIRS) is developed to hand the surgical instruments to a surgeon by the robot. The characteristics ot the instruments are area of the instruments, ratio of minimum center-contour distance to maximum one and its outline contour, are recognized by using the image processing. Kinds of the instruments are distinguished by these characteristics. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1998-11-30 |
| 巻 | 33巻 |
| 号 | 1号 |
| 開始ページ | 31 |
| 終了ページ | 37 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309084 |
| JaLCDOI | 10.18926/15463 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_28_2_59.pdf |
| 著者 | 西垣 誠| Sun Yao| 河野 伊一郎| |
| 抄録 | In this paper, first, an elasto-plastic consitituve equation for unsaturated soil was developed by considering of the basically behavior of unsaturated soil. Second, the results of a number of triaxial test and a set of rigid foundation model tests were simulated by using this constitutive equation, the agreement between observed and computed results was satisfactory and confirms the possibilities of this constitutive equation. |
| 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 | 59 |
| 終了ページ | 75 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307850 |
| 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 |
| 巻 | 36巻 |
| 号 | 2号 |
| 開始ページ | 15 |
| 終了ページ | 42 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 80015471209 |
| JaLCDOI | 10.18926/15362 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_35_97.pdf |
| 著者 | 山崎 進| 黒瀬 義則| |
| 抄録 | In this paper, we formulate a new integrity constraint in correlation with 3-valued stable models in an abduction framework based on general logic programs. Under the constraint, not every ground atom or its negation is a logical consequence of the theory and an expected abductive explanation, but some atom may be unspecified as a logical consequence by an adjustment. As a reflection of the integrity constraint with an adjustment, we augment an adjusting derivation to Eshghi and Kowalski abductive proof procedure, in which such an unspecified atom can be dealt with. |
| 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 | 97 |
| 終了ページ | 135 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307812 |
| JaLCDOI | 10.18926/19663 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_33_2_39.pdf |
| 著者 | Yanagi Makoto| 岡 久雄| |
| 抄録 | The acousicmyogram (AMG) is a mechanical phenomenon recorded at the surface of an active muscle. It is used to monitor force production, fatigue, and contractile properties of muscle. In this study, the new electrode with accelerometer for electrostimulation and acoustic detection. It consists of Ag-AgCl active electrode and solid-gel annular groud, and a very light piezoresistive accelerometer. The recorded AMG waveform depends on the pulse amplitude and duration of stimulation current and its lag from the electroatimulation is about 7 ms. The strengh-duration (S-D) curve (the threshold current for stimulation vs. pulse duration) describes the excitability of muscle. The left forearm is electrostimulated by using the same electrode and the muscle vibration (AMG) is recorded with accelerometer. During the muscle fatigue, the S-D curve changes and the current threshold increases under the same pulse duration. The rheobase of S-D curve increases gradually but the chronaxie hardly changes during muscle fatigue. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1999-04-27 |
| 巻 | 33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 | 120002309185 |
| JaLCDOI | 10.18926/15398 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_27_1_93.pdf |
| 著者 | 西垣 誠| Sudinda Teddy| Hishiya Tomoyuki| 河野 伊一郎| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1992-11-25 |
| 巻 | 27巻 |
| 号 | 1号 |
| 開始ページ | 93 |
| 終了ページ | 105 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307768 |
| JaLCDOI | 10.18926/46983 |
|---|---|
| フルテキストURL | mfe_37_2_089_097.pdf |
| 著者 | Iokibe, Kengo| Toyota, Yoshitaka| Wada, Osami| Koga, Ryuji| |
| 抄録 | Aerosol extinction coefficients of clouds and dust were continuously measured in the year of 2002 with a polarized Mie-scattering lidar controlled by an automatic and remotely operating system utilizing internet services. Measured cloud extinctions were greater than 1.0 km(-1) below the altitude 6 km, 0.17 - 1.0 km(-1) between 6 and 10 km, and 0.091 - 0.3 km(-1) beyond 10km. Extinction of dust were 0.10 and 0.20 km(-1) for Asian dust and 0.057 km(-1) for urban dust. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2003-03 |
| 巻 | 37巻 |
| 号 | 2号 |
| 開始ページ | 89 |
| 終了ページ | 97 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120003457336 |
| JaLCDOI | 10.18926/14149 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_39_1_40.pdf |
| 著者 | Al-Sehaim, Sulaiman| 小西 正躬| 能勢 和夫| |
| 抄録 | In this paper, two problems, plant allocation problem and that of transfer routing from plants to customers, are considered simultaneously. Especially, adaptation scheme for emergency cases are checked. To solve these problems, decentralized agent based optimization procedures are used. In our study, oil production and products transfer in Saudi Arabia are treated. Through numerical experiments, practicability of the proposed method is verified. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2005-01 |
| 巻 | 39巻 |
| 号 | 1号 |
| 開始ページ | 40 |
| 終了ページ | 45 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308505 |
| JaLCDOI | 10.18926/46967 |
|---|---|
| フルテキストURL | mfe_37_1_001_010.pdf |
| 著者 | Sotobayashi, Ken| Konishi, Masami| Nishi, Tatsushi| Imai, Jun| |
| 抄録 | Auto Guided Vehicles (AGVs) are widely used in a semi-conductor fabricating factory and contribute to the stable production of a high quality semi-conductor products. In the near future, further expansion of the transportation system is expected accompanied with the rapid growth of semi-conductor industries. In such situation, the necessity of performing quick planning of transportation route and transportation control will be elevated. In this paper, practicable planning of the transportation route and transportation control are studied based on the decentralized agent method. Especially, the geometrical sizes of AGVs are considered in the determination of transportation routes and control strategy avoiding the occurrence of mutual collisions or deadlock of AGVs. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2002-11 |
| 巻 | 37巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 10 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120003457322 |
| JaLCDOI | 10.18926/15491 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_24_2_11.pdf |
| 著者 | 榊原 精| Kanadani, Teruto| |
| 抄録 | Aging behavior of Al-0.23mass % Si alloy was studied by measurements of elecrical resistivity. Resistvity maximum was observed in the aging curves at 273K after quenching from various temperatures. Appearance of maximum and its dependence on the quenching temperature were attributed to the formation of GP zones. Even in a more dilute alloy as 0.01mass % Si, the maximum of resistivity was also recognized. |
| 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 | 11 |
| 終了ページ | 16 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307615 |
| JaLCDOI | 10.18926/15164 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_35_41.pdf |
| 著者 | Kuroboshi, Manabu| Tanaka, Muneaki| Kishimoto, Suguru| Goto, Kentaro| Tanaka, Hideo| |
| 抄録 | In 360 females, Bone mineral density (BMD) in lumbar vertebrae (L2-L4) was assessed by quantitative computed tomography (QCT), and the values obtained were compared with the frequency of vertebral transformation or fracture as assessed by lateral scan image (scanogram) by X-ray CT. A correlation was observed between the frequency of vertebral transformation (or fracture) and lumbar BMD values : BMD under 125 mg/cm(3) was observed over 90% of women with vertebral transformation, and BMD under 70mg/cm(3) was found about 50% of them. These results suggest that decrease in BMD in lumbar vertebrae leads to vertebral transformation or fracture. Thus, measurement of BMD by QCT would be very useful in predicting vertebral transformation or fractures. |
| 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 | 41 |
| 終了ページ | 46 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307948 |
| 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 |
| 巻 | 23巻 |
| 号 | 1号 |
| 開始ページ | 31 |
| 終了ページ | 38 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307464 |
| JaLCDOI | 10.18926/15462 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_23_1_39.pdf |
| 著者 | 尾坂 明義| Yuasa Motokazu| 三浦 嘉也| 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 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. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1988-11-22 |
| 巻 | 23巻 |
| 号 | 1号 |
| 開始ページ | 39 |
| 終了ページ | 48 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307518 |
| JaLCDOI | 10.18926/14080 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_41_1_11.pdf |
| 著者 | Nogami, Yasuyuki| Morikawa, Yoshitaka| |
| 抄録 | This paper proposes an algorithm for generating irreducible cubic trinomials in the form x(3) + ax + b, b ∈ F(p), where a is a certain fixed non-zero element in the prime field F(p). The proposed algorithm needs a certain irreducible cubic trinomial over F(p) to be previously given as a generator; however, the proposed algorithm can generate irreducible cubic polynomials one after another by changing a certain parameter in F(p). In this paper, we compare the calculation cost and the average computation time for generating an irreducible cubic polynomial, especially trinomial, among Hiramoto et al. irreducibility testing algorithm, Berlekamp-Massey minimal polynomial determining algorithm, and the proposed algorithm. From the experimental results, it is shown that the proposed algorithm is the fastest among the three algorithms for generating irreducible cubic trinomials. |
| キーワード | irreducible cubic polynomial minimal polynomial |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2007-01 |
| 巻 | 41巻 |
| 号 | 1号 |
| 開始ページ | 11 |
| 終了ページ | 19 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308381 |
| JaLCDOI | 10.18926/19689 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_33_2_105.pdf |
| 著者 | Tokunaga Shuichi| 大崎 紘一| |
| 抄録 | This paper deals with analytical method of human motion by image processing to make a model of the scooping process, Firstly, the scooping tool is the spoon, and while the scooping process is performing, the movement of the mouth center position and the spoon top position are measured by two cameras. As the amount of substance is over the uppermost area of the cup, the spoon is stuck obliquely into substance. Then the spoon is rotated and lifted up to the mouth. Secondly, we recognize the mouth center from the characteristic of the face image data and calculate the spoon top position to extract two points on the spoon handle from the time series images by two cameras. Finally, we describe the method of recognizing the coordinate of the mouth center and estimating the coordinate of the spoon top to analyse the scooping process. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1999-04-27 |
| 巻 | 33巻 |
| 号 | 2号 |
| 開始ページ | 105 |
| 終了ページ | 110 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309175 |
| JaLCDOI | 10.18926/15475 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_23_2_21.pdf |
| 著者 | Myojin Sho| Yamada Masahito| Fujii Naoto| |
| 抄録 | Diversion model and disaggregate behavioral model of logit type are adopted as aggregate and disaggregate estimates, respectively. Diversion model is assumed as a binary choice process including diversion ratio function at each step in the process. Diversion ratio is assumed as a function of generalized-travel-time ratio. The function is identified with each of the two steps of diversion; diverson from rail and bus to car at first and from the rest undiverted to bus at second. The data used are those on inter-regional occupational person trips. Each function are found enough and/or critically significant in the statistical sense. At the begginning, sixteen characteristics variables are enrolled in disaggregate model, which are identified by use of the above data. Six variables are reached finally and are all reasonable. A brief comparison of goodness of fit to the data are made between two models. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1989-03-30 |
| 巻 | 23巻 |
| 号 | 2号 |
| 開始ページ | 21 |
| 終了ページ | 32 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307168 |