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Journal of Materials Science & Technology 2013年第11期29卷 1018-1024页

作者： Shufeng Li hisashi imai Katsuyoshi Kondoh Faculty of Materials Science and Engineering Xi'an University of Technology Joining and Welding Research Institute Osaka University

The effect of titanium addition on the microstructure and mechanical properties of brass Cu4OZn has been studied via the powder metallurgy （P/M） route. The water-atomized Cu4OZn-1.0 wt% Ti alloy powder was consolidated at different temperatures in the range of 400-600℃ using spark plasma sintering （SPS） and hot extrusion subsequently. Results show that the super-saturated solid solution titanium element in rapidly cooled brass Cu4OZn powder created high chemical potential for a precipitate reaction, showing significant grain refinement effects on the consolidated Cu4OZn matrix. Consequently, excellent mechanical properties were obtained by precipitation hardening and work hardening after sintering and extrusion, with yield strength of 390 MPa, ultimate tensile strength of 617 MPa, and Vickers micro-hardness of 192 HV, which are 28.7%, 23.4%, and 23.9% higher values than those of extruded Cu4OZn brass, respectively.

关键词： Brass Spark plasma sintering Extrusion Microstructure Mechanical property Precipitation Phase transformation

Strategies for Synchronous and Multiple Metastatic Liver Tumors Designed from Epithelial-Mesenchymal Transition Concept

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Journal of Cancer Therapy 2012年第3期3卷 201-206页

作者： Shinji Osada hisashi imai Yoshiyuki Sasaki Kazuhiro Yoshida Surgical Oncology Gifu University School of Medicine Gifu Japan Surgical Oncology Gifu University School of Medicine Gifu Japan.

At some point in the natural course of colorectal cancer up to 50% of patients will develop metastasis to the liver and it is one of the most critical effects for patient prognosis. The incidence of synchronous liver metastasis has been detected at around 20% - 25%, but the optimal timing of surgical resection remains controversial. Neoadjuvant chemotherapy has also been found to be beneficial not only for initially unresectable but also resectable synchronous metastases. Then, traditional surgical strategies of hepatic resection in accordance with past chemotherapeutic regimens have been used decreasingly over the past several years. This review will primarily discuss treatments in association with the recent developed chemotherapeutic regimens and surgical procedure from the clinical data and the concept for epithetlial-mesenchymal transition, which has recently been studied to elucidate mechanisms of the liver metastatic process.

关键词： Colorectal Cancer Surgical Indication Synchronous and Multiple Liver Metastasis Epithelial-Mesenchymal Transition (EMT)

The Best Choice to Achieve Zero Complications after Pancreatoduodenectomy

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Surgical Science 2011年第2期2卷 45-51页

作者： Shinji Osada hisashi imai Yoshiyuki Sasaki Itaru Yasufuku Ryuichi Asai Yoshihisa Tokumaru Takuji Sakuratani Kazuhiro Yoshida 不详

Pancreatoduodenectomy (PD) has been performed commonly, but the occurrence of pancreatic fistula (PF) is a critical trigger of complications, which are potentially life threatening, and is also associated with markedly prolonged hospitalization. Many techniques have been proposed for connecting the pancreatic stump with the gastrointestinal tract, stomach vs. jejunum, etc. Among the risk factors for PF, such as general patient factors or disease-related factors, the most important is the texture of the remnant pancreas. Surgical technique might be one improvable aspect that can reduce the pancreatic leakage rate, therefore;various methods of managing the pancreatic remnant have been studied. Methods of reconstruction between the remnant pancreas and the intestine include end-to-side with/without duct-to-mucosa anastomosis or end-to-end invagination styles, has been argued. Here, we review several trials for safety and methods of treating the pancreatic stump after PD, and demonstrate our experiences.

关键词： Pancreatoduodenectomy Reconstruction Pancreatojejunostomy Pancreatic Fistula Pancreatoenteric Anastomosis

Cryoablation-Induced Anti-Cancer Immune Reaction—Immune Reaction Induced By Cryoablation

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Journal of Cancer Therapy 2011年第2期2卷 135-139页

作者： Shinji Osada hisashi imai Yoshiyuki Sasaki Itaru Yasufuku Ryuichi Asai Yoshihisa Tokumaru Takuji Sakuratani Kazuhiro Yoshida Surgical Oncology Gifu University School of Medicine Yanagido Gifu City JAPAN.

Among the ablation procedures used against advanced liver cancer, thermal ablation therapy is widely applied, and the safety and efficacy of this technique have been well characterized. In contrast, the principle of cryosurgery is not only to control local recurrence, but also to stimulate the immune system into initiating an anti-tumor response. In recent years, we have developed a treatment method for patients with advanced liver tumors. From these experiences, repeated treatment was demonstrated to induce anti-cancer immune reaction-related factors. In the present review, mechanisms for anti-tumor immune reaction will be argued with introducing a novel strategy of a cryoablation.

关键词： Cryoablation Helper T cell Immune reaction Hepatoma Ablation therapy

过饱和固溶合金元素在粉末冶金石墨黄铜中的析出强化

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材料研究学报 2018年第11期32卷 843-852页

作者：李树丰今井久志近藤胜义张鑫潘登付亚波西安理工大学材料科学与工程学院西安710048 大阪大学接合科学研究所台州大学物理与电子工程学院台州318000

用水雾化制备了含Cr、Fe、Sn、Ti多元过饱和固溶合金元素的Cu40Zn黄铜合金粉末,将其与石墨颗粒预混合后在适当的温度烧结,热挤压后得到棒材。观测挤压棒材中石墨黄铜的微观组织并测量其切削性能和拉伸性能,研究了合金元素和石墨颗粒对... 详细信息

用水雾化制备了含Cr、Fe、Sn、Ti多元过饱和固溶合金元素的Cu40Zn黄铜合金粉末,将其与石墨颗粒预混合后在适当的温度烧结,热挤压后得到棒材。观测挤压棒材中石墨黄铜的微观组织并测量其切削性能和拉伸性能,研究了合金元素和石墨颗粒对切削性能和力学性能的影响。结果表明:黄铜粉末中的过饱和固溶合金元素Cr、Fe、Sn、Ti在后续的热加工过程中以微/纳米尺寸微粒析出,表现出优良的强化效果;合金元素在石墨/黄铜界面的富集和反应促进了石墨/黄铜的界面结合,提高了黄铜的切削性能但是不降低其力学性能。

关键词：有色金属及其合金石墨黄铜粉末冶金无铅力学性能切削性能

A construction method of matroidal networks

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Science China(Information Sciences) 2012年第11期55卷 2445-2453页

作者： imai Hideki Faculty of Science and Engineering Chuo University Tokyo 112-8551Japan

This paper discusses the question whether a network-matroid construction can be modified so that all matroid dependencies are re?ected in the *** propose a novel construction method for a matroidal network to address this ***,we investigate some properties of the matroidal network based on our construction *** relations between the matroidal network and its associated matroid are developed through various examples.

关键词： capacity matroid matroidal network network coding

Trehalose Biosynthesis in Response to Abiotic Stresses

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Journal of Integrative Plant Biology 2008年第10期50卷 1223-1229页

作者： Mihaela Iordachescu Ryozo imai Crop Cold Tolerance Research Team National Agricultural Research Center for Hokkaido Region National Agriculture and Food Research Organization Hitsujigaoka 1 Toyohira-ku Sapporo 062-8555 Japan

Trehalose is a non-reducing disaccharide that is present in diverse organisms ranging from bacteria and fungi to invertebrates, in which it serves as an energy source, osmolyte or protein/membrane protectant. The occurrence of trehalose and trehalose biosynthesis pathway in plants has been discovered recently. Multiple studies have revealed regulatory roles of trehalose-6-phosphate, a precursor of trehalose, in sugar metabolism, growth and development in plants. Trehalose levels are generally quite low in plants but may alter in response to environmental stresses. Transgenic plants overexpressing microbial trehalose biosynthesis genes have been shown to contain increased levels of trehalose and display drought, salt and cold tolerance. In-silico expression profiling of all Arabidopsis trehalose-6-phosphate synthases （TPSs） and trehalose-6-phosphate phosphatases （TPPs） revealed that certain classes of TPS and TPP genes are differentially regulated in response to a variety of abiotic stresses. These studies point to the importance of trehalose biosynthesis in stress responses.

关键词： abiotic stress Arabidopsis cold stress drought stress rice stress tobacco trehalose trehalose biosynthesis.

Experimental Study on Load Characteristics in a Floating Type Pendulum Wave Energy Converter

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Journal of Thermal Science 2014年第5期23卷 465-471页

作者： Tengen Murakami Yasutaka imai Shuichi Nagata Institute of Ocean Energy Saga University

A floating type pendulum wave energy converter(FPWEC) with a rotary vane pump as the power take-off system was proposed by Watabe et *** *** showed that this device had high energy conversion *** the previous research,the authors conducted 2D wave tank tests in regular waves to evaluate the generating efficiency of FPWEC with a power take-off system composed of pulleys,belts and a *** a result,the influence of the electrical load on the generating efficiency was ***,the load characteristics of FPWEC are pursued experimentally by using the servo motors to change the damping coefficient in this *** a later part of this paper,the motions of the model with the servo motors are compared with that of the case with the same power take-off system as the previous *** the above experiment,it may be concluded that the maximum primary conversion efficiency is achieved as high as 98%at the optimal load.

关键词： pendulum wave energy converter floating type load characteristics primary conversion efficiency

A study of optimal switching problem in limited-cycle with multiple periods

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第12期11卷 933-937页

作者： Jing SUN hisashi YAMAMOTO Masayuki MATSUI Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya Aichi 466-8555 Japan Department of System Design Management Systems Engineering Tokyo Metropolitan University 6-6 Asahigaoka Hino Tokyo 191-0065 Japan Department of lnformatics Graduate School of lnformatics and Engineering The University of Electro-Communications 1-5-1 Chofugaoka Chofu-shi Tokyo 182-8585 Japan

In a social system or production line,the restrictions of the cost and the due-time exist in each ***,whether these restrictions are satisfied is dependent not only on the risks of this period,but also on the risks generated *** consider controlling the production process by switching the processing rate to a faster one at a given *** paper deals with the optimal switching period to minimize the total expected cost of the production *** first propose the optimal switching period model,and then the mathematic formulation of the total expectation is ***,the policy of optimal switching period is investigated in detail by numerical experiments.

关键词： Limited-cycle problem Multi-period Optimal switching period Production seat system Manufacturing line

How does the 120-year cycle mast seeding of dwarf bamboo affect the rodent population?

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Ecological Processes 2022年第1期11卷 577-586页

作者： Hanami Suzuki Haruka Kashiwagi hisashi Kajimura Laboratory of Forest Protection Graduate School of Bioagricultural SciencesNagoya UniversityFurochoChikusakuNagoya 468-8601Japan Nagoya City Science Museum NakakuNagoya 460-0008Japan

Background:In 2017,large-scale flowering,seeding,and dying events of dwarf bamboo(Sasa borealis)occurred in a wide range in central Japan for the first time in 120 *** phenomenon of ***,like the mast seeding of trees,could be expected to provide a large amount of food for seed-eating rodents and gradually affect their ecology and population *** captured rodents in survey plots in a secondary broad-leaved forest with the phenomenon from 2018 to 2019 to investigate the species,the number of individuals,growing stage,sex,and body *** addition,we also compared the capture data for 2 years(2018–2019)with that for the mast seeding year(2017)and 6 years before it(2011–2016).Results:The mast seeding of *** greatly increased the population size of rodents,especially Apodemus speciosus and ***,Eothenomys smithii did not show such an *** of the captured rodent individuals were already adults at the time of new capture,and the proportion of male juveniles was extremely *** results suggest that the mast seeding of *** created unusually rich food availability for the population concentration of rodents due to their ***,body mass was not significantly different before and after the mast *** addition,the increased populations of the two Apodemus species did not decline 2 years after the *** masting,contrary to the previously reported decrease of rodent populations after tree ***:Our results indicate that the mast seeding of *** affected the population dynamics of Apodemus species over a long time and their individual composition of different growth ***,it did not affect their body mass.

关键词： Apodemus speciosus Apodemus argenteus Eothenomys smithii Mast seeding Population dynamics Predator satiation hypothesis Sasa borealis