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Local Particle-Ghost Symmetry

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Journal of Modern Physics 2015年第12期6卷 1721-1736页

作者： Yoshiharu kawamura Department of Physics Shinshu University Matsumoto Japan

We study the quantization of systems with local particle-ghost symmetries. The systems contain ordinary particles including gauge bosons and their counterparts obeying different statistics. The particle-ghost symmetries are new type of fermionic symmetries between ordinary particles and their ghost partners, different from the space-time supersymmetry and the BRST symmetry. There is a possibility that they are useful to explain phenomena of elementary particles at a more fundamental level, by extension of our systems. We show that our systems are formulated consistently or subsidiary conditions on states guarantee the unitarity of systems, as the first step towards the construction of a realistic fundamental theory.

关键词： Fermionic Symmetry BRST Quantization Quartet Mechanism

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静止水中单个上升气泡的直接数值模拟

工程热物理学报 2005年第6期26卷 980-982页

作者：陈斌 T.kawamura Y.Kodama 西安交通大学动力工程多相流国家重点实验室陕西西安710049 东京大学大学院工学系研究科环境海洋专攻应用流体工学实验室日本海上技术安全研究所紊流灵巧控制中心

本文发展了基于Front Tracking的直接数值模拟方法研究气液两相界面的迁移特性,该方法对气液两相采用半隐式的分步法直接求解N-S方程,耦合Front Tracking Method获得两相界面的三维变形。针对无边界以及垂直壁面附近静止水中的单个气泡... 详细信息

本文发展了基于Front Tracking的直接数值模拟方法研究气液两相界面的迁移特性,该方法对气液两相采用半隐式的分步法直接求解N-S方程,耦合Front Tracking Method获得两相界面的三维变形。针对无边界以及垂直壁面附近静止水中的单个气泡上升过程进行模拟,研究气泡运动的机理以及气泡与壁面的相互作用。数值模拟准确再现了气泡的上升过程和变形,不同Re数下气泡的上升速度计算结果同经验关联式非常吻合,验证了该方法的有效性。随后分析了气泡周围流场的结构,发现壁面对气泡周围流场的抑制是壁面对气泡作用力的主要原因,将导致气泡逐渐偏离垂直壁面。

关键词：直接数值模拟界面追踪法气泡变形壁面作用力

Differentiation of premacular hemorrhages with niveau formation

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International Journal of Ophthalmology(English edition) 2022年第12期15卷 2037-2040页

作者： Yorihisa Kitagawa Hiroyuki Shimada Akiyuki kawamura Hiroyuki Kaneko Koji Tanaka Hiroyuki Nakashizuka Department of Ophthalmology School of MedicineNihon UniversityChiyodakuTokyo 101-8309Japan

Dear Editor,W e present three anatomical forms of premacular hemorrhage with niveau formation:hemorrhage in posterior precortical vitreous pocket(intrapocket hemorrhage),sub-internal limiting membrane(ILM)hemorrhage,and premacular retrocortical *** formation is the formation of a horizonal boundary between fluid and blood cells when they accumulate in a closed space,because blood cells with higher specific gravity settle in a standing position.

关键词： hemorrhage macular limiting

Plastic deformation behavior of Mg97Zn1Y2 extruded alloys

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Transactions of Nonferrous Metals Society of China 2010年第7期20卷 1259-1268页

作者： K.HAGIHARA A.KINOSHITA Y.SUGINO M.YAMASAKI Y.kawamura H.Y.YASUDA Y.UMAKOSHI Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University2-1Yamada-okaSuitaOsaka 565-0871Japan Department of Materials Science Kumamoto University2-39-1KurokamiKumamoto 860-8555Japan National Institute for Materials Science 1-2-1SengenTsukubaIbaraki 305-0047Japan

The mechanical properties of the Mg97ZnlY2 extruded alloy containing the long-period stacking ordered phase, the so-called LPSO-phase, with a volume fraction of 24%-25%, were examined by compression tests and cyclic tension-compression deformation tests. The plastic behavior of the extruded alloys with compositions of Mg99.2Zn0.2Y0.6 and Mg89Zn4Y7 （molar fraction, %）, which were almost the same compositions of Mg matrix phase and LPSO phase in Mg97Zn1Y2 Mg/LPSO two-phase alloy, respectively, were also prepared. By comparing their mechanical properties, the strengthening mechanisms operating in the Mg97Zn1 Y2 extruded alloy were discussed. Existence of the LPSO-phase strongly enhanced the refinement of Mg matrix grain size during extrusion, which led to a large increment of the strength of alloy. In addition, the LPSO-phases, which were aligned along the extrusion direction in Mg97Zn1Y2 extruded alloy, acted as hardening phases, just like reinforced fibers.

关键词： plastic deformation yield stress LPSO-phase dislocation twinning

Sentinel lymph node navigation surgery for early stage gastric cancer

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World Journal of Gastroenterology 2014年第19期20卷 5685-5693页

作者： Norio Mitsumori Hiroshi Nimura Naoto Takahashi Masahiko kawamura Hiroaki Aoki Atsuo Shida Nobuo Omura Katsuhiko Yanaga Department of surgery the Jikei University School of MedicineNisi-shinbashiMinato-kuTokyo 105-8461Japan

We attempted to evaluate the history of sentinel node navigation surgery (SNNS), technical aspects, tracers, and clinical applications of SNNS using Infrared Ray Electronic Endoscopes (IREE) combined with Indocyanine Green (ICG). The sentinel lymph node (SLN) is defined as a first lymph node (LN) which receives cancer cells from a primary tumor. Reports on clinical application of SNNS for gastric cancers started to appear since early 2000s. Two prospective multicenter trials of SNNS for gastric cancer have also been accomplished in Japan. Kitagawa et al reported that the endoscopic dual (dye and radioisotope) tracer method for SN biopsy was confirmed acceptable and effective when applied to the early-stage gastric cancer (EGC). We have previously reported the usefulness of SNNS in gastrointestinal cancer using ICG as a tracer, combined with IREE (Olympus Optical, Tokyo, Japan) to detect SLN. LN metastasis rate of EGC is low. Hence, clinical application of SNNS for EGC might lead us to avoid unnecessary LN dissection, which could preserve the patient’s quality of life after operation. The most ideal method of SNNS should allow secure and accurate detection of SLN, and real time observation of lymphatic flow during operation.

关键词： Gastric cancer Sentinel node navigation surgery Infrared Ray Electronic Endoscopes Indocyanine Green

Effective Palladium(Ⅱ)Catalyst for Oxypalladation of Alkene

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复旦学报(自然科学版) 2005年第5期44卷 711-712页

作者： T.Hosokawa Y.kawamura K.Minami K.Koga Department of Environmental Systems Engineering Kochi University of Technology185 MiyanokuchiTosayamadaKochi782-8502Japan

1 Introduction A variety of Pd(Ⅱ)-catalyzed oxidative transformations ot allcenes with oxygen nucleophiles are catalyzed by PdX_(2)(X=OAc,Cl,etc)with CuX_(n)(n=1 or 2)under O_(2).In the so-called Wacker catalyst of such,Pd(OAc)_(2) is less reactive compared to PdCl_(2).In an attempt to increase the reactivity of Pd(OAc)_(2),we have now found that tuning of Cu site with catechol gives an intriguing reactivity to Pd(OAc)_(2),which is unprecedented in the chemistry of palladium.

关键词： Palladium(Ⅱ)acetate copper(Ⅱ)acetate catechol wacker oxidation allylic alcohols vinyl ethers 2-alkoxy-4-benzylidenetetrahydrofurans

Effective Palladium(Ⅱ) Catalyst for Oxypalladation of Alkene

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复旦学报(自然科学版) 2005年第5期 101-102页

作者： T. Hosokawa,Y. kawamura,K. Minami,K. Koga Department of Environmental Systems Engineering Kochi University of Technology 185 Miyanokuchi Tosayamada Kochi 782-8502 Japan Department of Environmental Systems Engineering Kochi University of Technology 185 Miyanokuchi Tosayamada Kochi 782-8502 Japan Department of Environmental Systems Engineering Kochi University of Technology 185 Miyanokuchi Tosayamada Kochi 782-8502 Japan Department of Environmental Systems Engineering Kochi University of Technology 185 Miyanokuchi Tosayamada Kochi 782-8502 Japan

Proposal of Distributed Scheduling Heuristics Using Mediation Agent

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Journal of Energy and Power Engineering 2013年第2期7卷 381-392页

作者： Takahiro kawamura Akihiko Ohsuga Corporate Research & Development Center Toshiba Corp. Kawasaki 212-8582 Japan Graduate School of lnformation Systems University of Electro-Communications Tokyo 182-8585 Japan

This paper proposes an agent-based distributed scheduling system against the background of the deregulation of electric utility and the smart grid for the renewable energy, and then focuses on a maintenance scheduling in the context of real problems. A synchronous backtrack algorithm, a welD-known method for distributed scheduling problems, has difficulties handling （A） rapid schedule adjustments and （B） impartial assignment. Thus, this paper proposes two kinds of heuristics：（1） parallel assignment and （2） multiple priority strategies, and developed the distributed scheduling system which makes use of the heuristics. It consists of schedulers for each power station and mediation agents which have cloning and merging functions to support the implementation of the heuristics. Finally, the result of experiment shows an improvement when handling the rapid adjustment and the impartiality issues with reasonable computational overhead.

关键词： Multi-agent distributed scheduling power management smart grid.

Effect of Waste Bamboo Fiber Addition on Mechanical Properties of Soil

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Open Journal of Civil Engineering 2019年第3期9卷 173-184页

作者： Motohei Kanayama Satoko kawamura Department of Food Production and Environmental Management Faculty of Agriculture Iwate University Morioka Japan Naigai Engineering Co. Ltd. Tokyo Japan

For soil improvement, a method using plant fiber has been used since ancient times. In recent years, the construction method using plant fiber has attracted attention as a ground improvement technology with less environmental load. In this work, the soil improvement effect using waste bamboo fiber was experimentally examined. The liquid limit and plastic limit of the mixed soil tended to increase with increasing bamboo fiber content and there was no change in the plasticity index of the mixed soil by the difference of bamboo fiber content. As a result from the compaction test and unconfined compression test, it was revealed that mixing of bamboo fiber resulted in a reduction of soil material required for construction and increasing in strength. The maximum compressive stress of the bamboo fiber mixed soil at the mixing ratio of 0%, 1%, 3% and 5% were 115, 108, 130 and 152 kN/m2, respectively. As the soil with fiber showed the lower stiffness and higher strength than that without fiber in the dry region, it can be judged that the addition of fiber brought ductility to the soil. And it was found that the decrease in the stiffness of the specimen due to the increase of water content was suppressed by the addition of the bamboo fiber. From the results of the observation with the digital microscope, it was observed that the two-layer structure consisting of the main relatively thick fibrous structure and the secondary capillary fibrous structure were formed. Thus, it was found that the complex structure of the bamboo fiber is deeply involved in the strength of the mixed soil.

关键词： Industrial waste Bamboo fiber Andsol Unconfined compressive strength Soil improvement