JaLCDOI | 10.18926/19657 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_33_2_19.pdf |
著者 | 山本 恭二| Jiao Xuecheng| Jiao Xuezhen| |
抄録 | A new type of hydrocyclone with a perforated inner cylinder is tested experimentally to study its performance for liquid-solid separation. The size of the cyclone is small so that it may be effective for small particle separation. Two types of the inner cylinder were made : the one has 39.5% void fraction of the perforated surface and the other has 73.5% . The mean particle diameter is 4.5 μ m. It is found that the pressure loss of the cyclone with the inner cylinder is reduced by about 25% compared with that of the ordinary type. The new type cyclone has better separation efficiency. |
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 | 19 |
終了ページ | 24 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002309091 |
JaLCDOI | 10.18926/19677 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_33_2_79.pdf |
著者 | 尾坂 明義| 早川 聡| Koyano Keiko| 都留 寛治| |
抄録 | A titanium oxide gel was electrochemically prepared on Ti with a cell consisting of Ti as the working electrode, Pt as the counter one, AgCl as the reference one, and an aqueous solution of 0.1 mol/L Ca(NO(3))(2) as the electrolyte solution. The Ti electrode was kept at 9.5V for 1 hr for oxidation and subsequently kept at-3.0V for 10 min (Ca9.5-3.0):calcium ions were expected to be adsorbed at the latter treatment. Other Ti specimen was kept at -3.0V for 10 min (Ca-3.0). Both specimens were found so bioactive as to deposit apatite in 12 hr (Ca9.5-3.0) and in 1 day (Ca-3.0) when soaked in a simulated body fluid (Kokubo solution). Calcium carbonate detected on the surface of Ca9.5-3.0 caused no harmful effects on spontaneous deposition of apatite in the fluid. |
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 | 79 |
終了ページ | 84 |
ISSN | 0475-0071 |
言語 | 日本語 |
論文のバージョン | publisher |
NAID | 120002309011 |
JaLCDOI | 10.18926/19673 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_33_2_61.pdf |
著者 | 東辻 浩夫| 鶴田 健二| 東辻 千枝子| |
抄録 | The behavior of multicomponent plasmas in the Penning-Malmberg traps is discussed with the parameters corresponding to experiments with antiprotons and cryogenic electrons. The relaxation times for the energy transfer antiprotons to electrons and between parallel and perpendicular components of electrons are estimated. It is shown that, depending on the values of parameters, both the former and the latter can be the bottleneck in the cooling 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 | 61 |
終了ページ | 69 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002309106 |
JaLCDOI | 10.18926/15360 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_34_27.pdf |
著者 | Wei, He| 古賀 隆治| 五百旗頭 健吾| 和田 修己| 豊田 啓孝| |
抄録 | In spring of 1998, Asian dust was observed with a Mie LIDAR in Okayama University, which can measure depolarization ratio. Three events of intense Asian dust were occurred in the period and medially detailed structure of atmosphere was found after examining records. Asian dust was distinguished from water droplets and the possibility to study three dimensional dynamic structure of atmosphere were demonstrated. |
キーワード | Mie lidar Asian dust (KOSA) depolarization ratio backscattering ratio range normalized |
出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
発行日 | 2000-03-27 |
巻 | 34巻 |
号 | 1-2号 |
開始ページ | 27 |
終了ページ | 37 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307539 |
JaLCDOI | 10.18926/15354 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_34_1.pdf |
著者 | Song Baoyin| 稲葉 英男| 堀部 明彦| Takahashi Takashi| |
抄録 | The experiment for investigating the falling snow melting characteristics of warm water flowing along sheet channels spread on a roof was performed in Tookamachi city, Nigata prefecture from February 6 to February 7, 1995. The sheet surface temperatures at 11 positions in 3 channels were measured. A physical model for a gas-water-snow system was constructed to compare the predicted results with the measured ones. A fully spread uniform water film in the sheet channel was observed in the experiments. The experimental results elucidated that it was feasible to use warm water flowing along sheet channels for melting falling snow on roofs. The temperature drop in the sheet channel mainly depended on the snowfall intensity, atmospheric temperature and wind speed. Under the influence of the roof edge, the temperature drop in the channel next to the side edge was much larger than that in middle channels. A water-snow two phase flow or a snow covered frozen water was experienced temporarily in the lower reaches of the water flowing channel. These suggest that a larger water flow rate is needed for the channel next to the roof edge, and a higher inlet temperature or a greater water flow rate is required for a severe weather condition. There was reasonably good agreement between the measured and predicted water temperatures. |
出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
発行日 | 2000-03-27 |
巻 | 34巻 |
号 | 1-2号 |
開始ページ | 1 |
終了ページ | 12 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307686 |
JaLCDOI | 10.18926/15356 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_34_13.pdf |
著者 | 榊原 精| Tanimoto, Tadashi| Matsushima, Takahisa| Hosokawa, Norio| Kanadani, Teruto| |
抄録 | Repeated tensile fatigue strength of the low temperature age-hardened Al-Zn alloys is investigated varying the specimen thickness. Fatigue strength of the age-hardened specimens decreases with the specimen thickness when the specimen is thinner than a certain thickness, whereas fatigue strength of non age-hardened specimens, i.e., pure aluminum and dilute Al-Zn alloy, does not depend the specimen thickness. The dependence of fatigue strength on the thickness of age-hardened specimen is considered to be caused by the decrease of the strength of specimen as a whole, as a result of increase in volume ratio of the soft surface layer formed after age-hardening with decreasing specimen thickness. |
出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
発行日 | 2000-03-27 |
巻 | 34巻 |
号 | 1-2号 |
開始ページ | 13 |
終了ページ | 17 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307815 |
JaLCDOI | 10.18926/15359 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_34_19.pdf |
著者 | Okada, Akira| Uno, Yoshiyuki| Okajima, Isao| |
抄録 | In EDM, the machining characteristics greatly depend on the energy distribution. Therefore, it is very important to clarify the energy distribution for understanding various phenomena in EDM. In this paper, the energy distribution in EDM with graphite electrode is investigated by measuring the temperatures of electrode and workpiece. Experimental analysis shows that the material removal rate depends on energy density while the electrode wear greatly depends on the adhesion of heat resolved carbon from machining fluid, and the energies distributed into electrode and workpiece are almost constant regardless of pulse duration. |
出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
発行日 | 2000-03-27 |
巻 | 34巻 |
号 | 1-2号 |
開始ページ | 19 |
終了ページ | 26 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307707 |
JaLCDOI | 10.18926/15363 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_34_39.pdf |
著者 | 早川 聡| 城崎 由紀| 籔田 武司| 都留 寛治| Ohtsuki Chikara| 尾坂 明義| |
抄録 | Silicone elastomer was chemically treated at 60℃ for 7 days with 30 wt% H(2)O(2) solutions with or without TaCl(5) and soaked for various periods in a simulated body fluid(Kokubo solution) up to 21 days. Apatite formation ability of the surface of the silicone elastomer specimens was investigated with thin-film X-ray diffraction and FT-IR reflection spectroscopy. These silicone specimens did not deposit apatite or calcium phosphates, irrespective of chemical treatment. Osteoblast-like cells (MC3T3-El) derived from mouse were cultured on the specimens at 36.5℃ under 5%C0(2) and 95% humidity. Similar degree of proliferation of cells was observed at 7 days among three specimens, while the no treatment specimen after incubation for 5 days showed a lower degree of proliferation than the silicone treated with 30 wt% H(2)O(2) solutions with or without TaCl(5). Alkaline phosphatase activity of the cells proliferated on the no treatment specimen was lower than those of the silicone treated with 30 wt% H(2)O(2) solutions with or without TaCl(5). These results indicate that the cytotoxicity of the silicone could be improved by the chemical treatment with 30 wt% H(2)O(2) solutions with or without TaCl(5). |
出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
発行日 | 2000-03-27 |
巻 | 34巻 |
号 | 1-2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 | 120002308019 |
JaLCDOI | 10.18926/15373 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_169.pdf |
著者 | Ueda Kiyotaka| 大崎 紘一| 梶原 康博| 宗澤 良臣| |
抄録 | We propose an image processing method for part handling robot for picking up subjects piled in a container. Line laser light is projected on subjects, and its external shape is detected by many segments of a line laser, and pitch, roll, and yaw angles of subject are recognized precisely. A priority rule is settled to choose one subject that is taken out. This rule is determined by considering the grasping space, the position of a subject, the movement space of hand and so on. |
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 | 169 |
終了ページ | 175 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307198 |
JaLCDOI | 10.18926/15368 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_155.pdf |
著者 | Takahashi Hiromitsu| 宗澤 良臣| 梶原 康博| 大崎 紘一| Wada Yatarou| |
抄録 | This paper proposes a concept of a mobile type maintenance robot (MMR in shortly) that is controlled by the tele-operation for assuring the safety and health improvement of work forces. The main components of this system are the industrial robot, an image processing unit, vehicle and computers for tele-operation. Our focus is paid on a method that determine a pathway to move every places where troubles would occur. This method makes it possible that the MMR could arrive any place in the factory with three times of turns at most. Additionally, turning radius of the vehicle is considered for correcting the pathway near the corners to make it possible that it arrives to the place accurately. |
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 | 155 |
終了ページ | 161 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307844 |
JaLCDOI | 10.18926/15371 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_163.pdf |
著者 | Uchiyama Hiromitsu| Miyazaki Satoshi| 大崎 紘一| 梶原 康博| 宗澤 良臣| Matsuki Katsunori| |
抄録 | We develop an assembly robot system for assembling the flexible belt-shaped subject. An image processing method is developed to recognize the belt-shaped subject. This method is able to determine the grasping point and grasping angle for piking up a subject by a multiple hands unit. CAD information is used to determine the grasping point. The multiple hands unit is developed, which is able to grasp all grasping points of a subject at a time. In addition, the image processing method is used to judge whether a subject is fastened accurately at right position or not during the assembly. |
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 | 163 |
終了ページ | 168 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307229 |
JaLCDOI | 10.18926/15375 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_177.pdf |
著者 | Kanki Kunihiko| 大崎 紘一| 梶原 康博| 宗澤 良臣| Ohta Kazuharu| |
抄録 | The focus of this paper is on the analysis of delivery motion of human, development of an image processing method based on the motion analysis and development of the cooperative delivery robot using the image processing method. The proposed image processing method uses two cameras, and it uses a stereo reconstruction technique for measuring position and postures of hands. In addition, this image processing method recognize the number of fingers extending consciously, so the cooperative human beings could choose the kind of tool which he wants by holding out his hand in front of cameras. |
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 | 177 |
終了ページ | 182 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307899 |
JaLCDOI | 10.18926/15376 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_183.pdf |
著者 | Tabuchi Satoshi| 大崎 紘一| 梶原 康博| 宗澤 良臣| |
抄録 | This research proposes a strategy for reducing both electricity charge and environmental load by considering multi energy sources. The reduction of the contract electric demand is considered, and its differential cost is used for purchasing substitute power sources. Some variables, such as the amount of reduced contract demand, and amount of electricity are generated by each substitute power source. By using those variables, we formulate a simulation model that enables to minimize the energy cost and environmental cost. |
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 | 183 |
終了ページ | 189 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307173 |
JaLCDOI | 10.18926/15366 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_147.pdf |
著者 | 山際 雅詩| 酒井 裕| |
抄録 | The Cry4A toxin is a dipteran-specific insecticidal protein produced by Bacillus thuringiensis subsp. israelensis as a protoxin of 130 kDa. Its active form is a heterodimer of 20- and 45-kDa fragments which is generated by an interhelical cleavage of a 60-kDa intermediate at the position of Gln236 between α5 and α6 helices in domain I. On the other hand, Cry1Aa, which is also produced as a 130-kDa protoxin but toxic to lepidopteran larvae, was processed into the active 60-kDa fragment with no additional cleavage. To investigate the role of the intramolecular cleavage of Cry4A for its insecticidal activity, the loop between α5 and α6 of Cry4A which includes the cleavage site was substituted for the corresponding region of Cry1Aa. The resulting mutant designated GST-60Loop was expressed as a GST-fusion protein. A difference of the processing profile was observed between GST-60 and GST-60Loop in the in vitro digestion assay by trypsin, and the insecticidal activity of GST-60Loop was two-fold lower than that of GST-60. These results suggested that the interhelical cleavage of Cry4A promoted the toxicity against C. pipiens larvae. |
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 | 147 |
終了ページ | 154 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307324 |
JaLCDOI | 10.18926/15378 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_191.pdf |
著者 | Yoshida Takanobu| 宗澤 良臣| 大崎 紘一| 梶原 康博| Ohta Kazuharu| |
抄録 | We developed the disassembly system that uses the impulsive load and disassembly tools to disassemble used appliances economically. The main components of this system are impulse hammer, a lift table and developed disassembly tools. Several types of disassembly tools are developed to punch out fastened portion on a part and cut off the shaft of screw or connection pin of IC-chip. A simulation model is proposed to explain and formulate how the fastening point of product is broken and cut. Three kinds of disassembly tools are designed. The actual disassembly system is developed by using proposed simulation models and disassembly tools. |
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 | 191 |
終了ページ | 196 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307328 |
JaLCDOI | 10.18926/15364 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_137.pdf |
著者 | Sakiyama, Takaharu| Yoshimi, Tsuyoshi| Miyake, Akira| Umeoka, Midori| Tanaka, Atsushi| Ozaki, Sho| Nakanishi, Kazuhiro| |
抄録 | A monoacylglycerol lipase (MGL) was purified from Pseudomonas sp. LP7315 by ammonium sulfate precipitation, anion-exchange chromatography, and preparative electrophoresis. The purified enzyme was homogeneous on an SDS-polyacrylamide gel with a molecular mass of 59 kDa. Its hydrolytic activity was confirmed to be specific for monoglycerides: the enzyme did not hydrolyze diand triglycerides. MGL was found to be stable even after l-h incubation at 65℃. The hydrolytic activity depended not only on temperature and pH but also on the type of monoglyceride used. MGL also catalyzed monoglyceride synthesis at 65℃ in a solvent-free two-phase system, in which fatty acid droplets were dispersed in the glycerol phase with a low water content. The synthetic reaction proceeded at a constant rate for approximately 24 h and reached an equilibrium after 48 h of reaction. The initial rate of the synthetic reaction depended on several factors: the type of fatty acid used as the substrate, the amounts of fatty acid and glycerol, and the concentration of MGL in the glycerol phase. To analyze the effects of these factors, a kinetic model was developed based on the assumption that the adsorption equilibrium of MGL molecules at the interface between the two phases is the rate-determining factor for the synthetic reaction. The model was found to yield a good approximation of the initial synthetic rate under various reaction conditions. The analysis suggests that the adsorption behavior of MGL onto the interface had a large effect on the initial rate of the monoglyceride synthesis. |
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 | 137 |
終了ページ | 146 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307705 |
JaLCDOI | 10.18926/15380 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_197.pdf |
著者 | Nogami, Yasuyuki| Morikawa, Yoshitaka| |
抄録 | Modern communication engineerings, such as elliptic curve cryptographies, often requires algebra on finite extension field defined by modulus arithmetic with an irreducible polynomial. This paper provides a new method to detemine the minimal (irreducible) polynomial of a given proper element in finite extension field. In the conventional determination method, as we have to solve the simultaneous equations, the computation is very involved. In this paper, the well known "trace" is extended to higher degree traces. Using the new traces, we yield the coefficient formula of the desired minimal polynomial. The new method becomes very simple without solving the simultaneous equations, and about twice faster than the conventional method in computation speed. |
キーワード | finite field minimal polynomial irreducible polynomial higher degree trace trace cryptography |
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 | 197 |
終了ページ | 205 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307992 |
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 | 10.18926/15382 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_207.pdf |
著者 | 中西 透| Fujiwara Toru| |
抄録 | In the group signature scheme with a trusted party, a verifier can determine whether or not a signature is made by a member of the group, but cannot identify the member who signed the signature. In case of dispute later on, the signer can be identified by the trusted party. However, for efficient group signature schemes proposed so far, removing a member from the group can be not efficiently performed. In this paper, a group signature scheme with an easy membership canceling is proposed. By sending a request to use a resource together with the group signature on it to the manager of the resource, the manager can control anonymous accesses to the resource. In such an application, the proposed group signature scheme is suitable for canceling of the access privilege. |
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 | 207 |
終了ページ | 212 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307232 |
JaLCDOI | 10.18926/15361 |
---|---|
フルテキストURL | Mem_Fac_Eng_OU_35_77.pdf |
著者 | Kishimoto Tokunari| 東辻 千枝子| 鶴田 健二| 東辻 浩夫| |
抄録 | In order to perform the large-scale molecular dynamics simulation of the Yukawa system, a mathematical expression for molecular dynamics using the fast multipole method is described. The model simulations are also performed to test the performance of our implementation of the FMM. |
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 | 77 |
終了ページ | 95 |
ISSN | 0475-0071 |
言語 | 英語 |
論文のバージョン | publisher |
NAID | 120002307940 |