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Aerodynamic Study on Supersonic Flows in High-Velocity Oxy-Fuel Thermal Spray Process

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Journal of Thermal Science 2005年第2期14卷 126-129页

作者： Hiroshi KATANODA takeshi matsuoka Seiji KURODA Jin KAWAKITA Hirotaka FUKANUMA Kazuyasu MATSUO The University of Kitakyushu 1-1 Hibikino Wakamatsu-kuKitakyushuFukuoka808-0135 JapanTakagi Precision Dies Co. Ltd.2-4-1 IshidaminamiKokuraminami-kuKitakyushuFukuoka802-0836 JapanNational Institute for Materials Science 1-2-1SengenTsukubaIbaraki305-0047 JapanNational Institute for Materials Science 1-2-1SengenTsukubaIbaraki305-0047 JapanPlasma Giken Co. Ltd.2-1-12BijogiTodaSaitama335-0031 JapanThe University of Kitakyushu 1-1 HibikinoWakamatsu-kuKitakyushuFukuoka808-0135 Japan

To clarify the characteristics of gas flow in high velocity oxy-fuel (HVOF) thermal spray gun, aerodynamic research is performed using a special gun. The gun has rectangular cross-sectional area and sidewalls of optical glass to visualize the internal flow. The gun consists of a supersonic nozzle with the design Mach number of 2.0 followed by a straight passage called barrel. Compressed dry air up to 0.78 MPa is used as a process gas instead of combustion gas which is used in a commercial HVOF gun. The high-speed gas flows with shock waves in the gun and jets are visualized by schlieren technique. Complicated internal and external flow-fields containing various types of shock wave as well as expansion wave are visualized.

关键词：超声流冲击波热喷涂内流热处理

Therapeutic barium enema for bleeding colonic diverticula:Four case series and review of the literature

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World Journal of Gastroenterology 2008年第41期14卷 6413-6417页

作者： Jun-ichi Iwamoto Yuji Mizokami Koichi Shimokobe takeshi matsuoka Yasushi Matsuzaki Department of Gastroenterology Tokyo Medical University Kasumigaura Hospital Chuo 3-20-1 Ami Inashiki

The prevalence of diverticular diseases of the colon, including severe and persistent bleeding in Eastern countries, has increased in the last decades. The bleeding from colonic diverticula is the most common cause of acute lower gastrointestinal bleeding. Herein, we report four cases of severe and persistent bleeding of colonic diverticular disease that could be treated with a high concentration barium enema. These four cases showed a similar pattern of bleeding whose source could not be identified. Colonoscopy revealed fresh blood in the entire colon and many diverticula were noted throughout the colon. No active bleeding source was identified, but large adherent clots in some diverticula were noted. After endoscopic and angiographic therapies failed, therapeutic barium enema stopped the severe bleeding. These patients remained free of re-bleeding in the follow-up period (range 17-35 mo) after the therapy. We report the four case series of therapeutic barium enema and reviewed the literature pertinent to this procedure.

关键词： Therapeutic barium enema Colonic diverticula Diverticular bleeding

Physiological Analysis for Universal Design of Public Seat Under Diverse Conditions

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Journal of Literature and Art Studies 2013年第2期3卷 125-136页

作者： takeshi Kitamura Koichiro Sato Yoshiyuki matsuoka Takeo Kato Keio University Yokohama Japan Tokai University Tokyo Japan

Public vehicle seats are used under diverse conditions, therefore, the design of these seats is desired to be universal design. In the past study, seat swing function used in public vehicle seats, and it was optimized from the mechanical aspect under diverse conditions. Seat swing function is the function to prevent hip-sliding force, which causes sitting uncomfortable feeling. Recent study clarified that the reduction of blood flow in the legs causes physiological dysfunction, which is one of the causes of Long Flight Thrombosis, and the social issue. Thus, in the design of seat swing function, it is necessary to consider not only mechanical aspects but also physiological aspects. For the universal design of seat swing function considering the physiological aspect （blood flow）, the influence of blood flow on seat swing function in diverse conditions was analyzed. The method of this study was measuring blood flow and body pressure distribution on seat cushion of seat swing function under diverse conditions. From the analysis, it was indicated that it was necessary to reduce the compressive force behind the knees of the user conditions; the short physique and the high weight physique in standard sitting posture, for the universal design of seat swing function to prevent reduction of blood flow in the legs.

关键词： universal design diverse conditions seat blood flow

Isolation of a Novel Lodging Resistance QTL Gene Involved in Strigolactone Signaling and Its Pyramiding with a QTL Gene Involved in Another Mechanism

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Molecular Plant 2015年第2期8卷 303-314页

作者： Kenji Yano Taiichiro Ookawa Koichiro Aya Yusuke Ochiai Tadashi Hirasawa takeshi Ebitani takeshi Takarada Masahiro Yano Toshio Yamamoto Shuichi Fukuoka Jianzhong Wu Tsuyu Ando Reynante Lacsamana Ordonio Ko Hirano Makoto matsuoka Bioscience and Biotechnology Center Nagoya University Nagoya Aichi 464-8601 Japan Graduate School of Agriculture Tokyo University of Agriculture and Technology Fuchu Tokyo 183-8509 Japan Agricultural Research Institute Toyama Agricultural Forestry & Fisheries Research Center Toyama 939-8153 Japan National Institute of Agrobiological Sciences Tsukuba Ibaraki 305-8602 Japan These authors contributed equally to this article.

Lodging has been a major roadblock to attaining increased crop productivity. In an attempt to understand the mechanism for culm strength in rice, we isolated an effective quantitative trait locus （QTL）, STRONG CULM3 （SCM3）, the causal gene of which is identical to rice TEOSINTE BRANCHED1 （OsTB1）, a gene previously reported to positively control strigolactone （SL） signaling. A near-isogenic line （NIL） carrying SCM3 showed enhanced culm strength and increased spikelet number despite the expected decrease in tiller number, indicating that SL also has a positive role in enhancing culm strength and spikelet number. We produced a pyramiding line carrying SCM3 and SCM2, another QTL encoding AP01 involved in panicle development. The NIL-SCM2＋SCM3 showed a much stronger culm than NIL-SCM2 and NIL-SCM3 and an increased spikelet number caused by the additive effect of these QTLs. We discuss the importance of utilizing suitable alleles of these STRONG CULM QTLs without inducing detrimental traits for breeding.

关键词： culm OsTB1 strigolactone lodging resistance quantitative trait loci

Estimation of the minimum miscibility pressure for CO_(2)ecrude-oil systems by molecular dynamics simulation

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Petroleum Research 2023年第1期8卷 1-10页

作者： Wuge Cui Yunfeng Liang Yoshihiro Masuda takeshi Tsuji Toshifumi matsuoka Haruka Takahashi Department of Systems Innovation School of EngineeringThe University of TokyoTokyo113-8656Japan Fukada Geological Institute Tokyo113-0021Japan JX Nippon Oil&Gas Exploration Corporation Tokyo100-8163Japan

CO_(2)injection is an effective enhanced oil recovery technique for energy security with the benefits of carbon *** reach the maximum oil recovery,the miscible condition between CO_(2)and oil needs to be maintained in the reservoir,which requires the operation pressure to be higher than the minimum miscibility pressure(MMP).There are two types of MMPs:the first-contact MMP(FC-MMP)and the multi-contact MMP(MC-MMP).In this study,molecular dynamics simulations were performed for the CO_(2)eoil interface system using two simplified digital oil models:a Bakken dead oil with four lumping components and a live-crude-oil model with 50 types of oil molecules but with no asphaltenes and heavy oil *** vanishing interfacial tension method was used to predict the *** CO_(2)eoil volume ratios were considered to mimic the different degrees of *** estimate the MMP accurately and rapidly,the interfacial tension in the low-pressure regime was used for the ***,different MMPs were obtained,where the MMP value increased with increasing CO_(2)eoil volume ***-MMP can be predicted when the CO_(2)eoil volume ratio is sufficiently *** the CO_(2)eoil volume ratio was approximately 9e10,MMP was closest to the actual MC-MMP *** condensing and vaporizing mechanism was also studied at the molecular *** pure CO_(2)was used,only the vaporizing effect on MMP *** was found that the intermediate C2eC6 components have the main effect on the MMP *** study can help to establish a computational protocol to estimate FC-MMP and MC-MMP,which are widely used in reservoir engineering.

关键词： CO_(2)-EOR Minimum miscibility pressure Molecular dynamics simulations Condensing and vaporizing mechanism CO_(2)eoil volume ratio Crude oil