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Advances in manufacturing 2019年第4期7卷 411-422页

作者： m.Kimura S.Iwamoto m.Kusaka K.Kaizu Y.Nakatani m.takahashi Department of mechanical Engineering Graduate School of EngineeringUniversity of Hyogo2167 ShoshaHimejiHyogo 671-2280Japan Toshiba Energy Systems&Solutions Corporation 2-4 Suehiro-choTsurumi-kuYokohamaKanagawa 230-0045Japan Department of mechanical Engineering Faculty of EngineeringNishinippon Institute of Technology1-11 NiitsuKanda-machiMiyako-gunFukuoka 800-0394Japan

The groove shape of the weld faying part was investigated to obtain an ideal pipe frictiowelded joint that had a fracture in the base metal and no inner flash of *** steel pipe had inner and outer diameters of 8.0 mm and 13.5 mm,respectively,and the weld faying surface was of a basic flat shape(butt)***,stepped and tapered groove shapes were *** groove shapes were welded with a friction speed of 27.5 s_1 and a friction load of 2.79 *** phenomena during the welding process were observed,and the tensile strength of joints was *** joints,that fabricated with flat or step groove shapes,made with a friction time at which the friction torque reached the initial peak did not have the tensile strength of the base metal nor a fracture in the base ***,the joints fabricated with a friction time that reached past the initial peak had a large flash,and they contained a fracture in the base *** contrast,when joints were made with a gently tapered groove shape with a friction time reaching the time of the initial peak,they achieved a fracture in the base metal,despite having an extremely small inner ***,the shape at the weld faying part was capable of reducing the flash exhausted from the weld interface.

关键词： Friction welding Steel pipe Inner flash Groove shape Taper Joint strength Fracture

Optimization of Cu content for the development of high-performance T5-treated thixo-cast Al-7Si-0.5mg-Cu(wt.%)alloy

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Journal of materials Science & Technology 2021年第34期93卷 178-190页

作者： K.Yamamoto m.takahashi Y.Kamikubo Y.Sugiura S.Iwasawa T.Nakata S.Kamado Nagaoka University of Technology NagaokaJapan Asanuma Giken Co. Ltd.HamamatsuJapa Industrial Research Institute of Shizuoka Prefecture ShizuokaJapan

Cu content has been successfully optimized in a thixo-cast and directly aged(T5-treatment)Al-7 Si-0.5 mg(wt.%)*** after the 0.5%Cu addition,plate-like Al_(2)Cu(θ’)phases,which contribute to high strengths and large plasticity,are *** formation of a large fraction of Cu-containing brittle phases could be suppressed as ***,the Al-7Si-0.5mg-0.5Cu alloy exhibits high ultimate tensile strength,0.2%proof stress,and elongation to failure of 296 mPa,209 mPa,and 8.8%,*** results in a high quality index similar to that of solution-treated and subsequently aged(T6-treated)Al-7 Si-mg alloys.A Cu addition over 1.0%further improves the strengths;however,this leads to poor ductility because of the high fraction of Cu-containing brittle phases.

关键词： Al-Si-mg-Cu alloy Thixo-casting T5-treatment mechanical property microstructure

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EFFECT OF FIELD-INDUCED mAGNETIC ANISOTROPY

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Science China mathematics 1986年第6期 619-630页

作者：金汉民,I.OKAmOTO,m.takahashi Department of Physics Jilin University Changchun Department of Aplied Physics Tohoku University Sendai Japan Department of Aplied Physics Tohoku University Sendai Japan

It is discovered by using a torque magnetometer that a magnetic anisotropy is induced in classical spin glasses Cumn and Agmn at low temperature only by applying a magnetic field higher than a critical value. The anisotropy is mainly unidirectional with a relatively small part of a uniaxial one. The field-cooled-induced magnetic anisotropy is in essential that of field-induced in these alloys though they are different quantitatively. The effect of field-induced magnetic anisotropy is not observed in Comn and Nimn alloys which also have the effect of field-cooledin-dueed magnetic *** typical characteristics of the field-induced magnetic anisotropy are presented.

关键词： EFFECT OF FIELD-INDUCED mAGNETIC ANISOTROPY than

Laser-assisted direct roller imprinting of large-area microstructured optical surfaces

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microsystems & Nanoengineering 2024年第1期10卷 257-266页

作者： Keisuke Nagato Ken takahashi Yuki Yajima masayuki Nakao Department of mechanical Engineering Graduate School of EngineeringThe University of Tokyo7-3-1 HongoBunkyo-kuTokyo 113-8656Japan

In this study,a high-throughput fabrication method called laser-assisted direct roller imprinting(LADRI)was developed to lower the cost of nanoimprinting large-area polymer films and to address problems associated with nanoimprinting,namely,microstructural damage and precision in flatness of entire *** LADRI,the laser directly heats the microstructured surface of the roller mold,which heats and melts the surface of a polymethyl methacrylate(PmmA)film to replicate the microstructures on the mold *** this study,the effects of laser power density,scanning speed,size of the microstructures,and contact pressure on the replication speed were investigated *** replication speed increased as the power and scanning speed ***,because the film required heating until it filled the entire depth of the microstructure,an appropriate replication speed was *** result was supported by simulation of the temperature distribution inside the mold and the PmmA using transient heat conduction *** demonstrate the applications of LADRI,two different optical surfaces were replicated:an antireflection(AR)structure with conical structures sized several hundred nanometers and a lightextraction structure with a microlens array(mLA)comprising 10μm lenses,for display and illumination,*** replication degree of the mLA was governed by the contact *** flow simulation indicated that the heat conduction and flow speeds of the melted PmmA surface were comparable within several tens of *** addition,the reflectivity of the AR structure decreased from 4 to 0.5%,and the light intensity of the light-extraction structure increased by a factor of 1.47.

关键词： microstructure roller conduction

DEFECT-FLUORITE OXIDES:Ln(Eu AND Gd)-mSSBAUER SPECTROSCOPIC STUDY COUPLED WITH NEW DEFECT-CRYSTAL-CHEmISTRY mODEL

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DEFECT-FLUORITE OXIDES:Ln(Eu AND Gd)-MSSBAUER SPECTROSCOPI...

EVALUATION BONE mASS OF RATS BY DUAL ENERGY X-RAY ABSORPTIOmETRY:INFLUENCE OF BODY WEIGHT AND NASOANAL LENGTH

8th International Symposium on the Industrial Applications of the mossbauer Effect

作者： A.Nakamura N.lgawa Y.Okamoto Y.Hinatsu m.takahashi m.Takeda Japan Atomic Energy Agency Advanced Science Research CenterTokaiNakaIbaraki 319-1195Japan Japan Atomic Energy Agency Quantum Beam Science DirectorateTokaiNakaIbaraki 319-1195Japan Hokkaido University Department of ChemistrySapporo 160-0810 HokkaidoJapan Toho University Department of ChemistryMiyamaFunahashiChiba 274-8510Japan

Defect-fluorite(DF) oxides as a generic term of various grossly oxygen-deficit oxygen-vacancy(V) type mLnO(V) solid solutions(ss) formed between parent fluorite(F) mO(m= Zr,Hf,Ce,Th,U,Np and Pu etc) and its V-ordered superstructure,lanthanide(Ln) and light-Ln C-type LnO(Ln= La-Lu,Y,Sc,In etc), have been the object of enormous research efforts for over these several decades due to their technological importance in nuclear,ceramic and electrochemical etc ***,much has remained elusive till now as to their

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EVALUATION BONE MASS OF RATS BY DUAL ENERGY X-RAY ABSORPTIOM...

TAmOXIFEN REDUCES BONE TURNOVER IN OVARIECTOmIZED RATS

第二届国际骨质疏松研讨会

作者： X.Li K.Kushida K.Yamazaki H.Yamauchi m.takahashi T.Inoue The second Hospital of Harbin medical University Department of Orthopedic Surgery Hamamatsu University School of Medicine

＜正＞INTRODUCTION The effects of body weight,body mass index（BmI） and other factors on bone mineral density（BmD） and bone mineral content（BmC） measured by dual energy x-ray absorptiometry（DXA） have been studied in ***,the effects of body weight and naso-anal length on bone mass in rats were less published,therefore we conduct this study.

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TAMOXIFEN REDUCES BONE TURNOVER IN OVARIECTOMIZED RATS

Fluorescence‑Based Calibration model for In‑Situ measurement of micro‑scaled Lubricant Thickness Distribution at Indentation Interface

第二届国际骨质疏松研讨会

作者： X.Li m.takahashi K.Kushida S.Koyama H.Hoshino K.Kawana K.Horiuchi T.Inoue The second Hospital of Harbin medical University Departments of Orthopedic Surgery and Chemistry Hamamatsu University School of Medicine

＜正＞INTRODUCTION The effect of tamoxifen（TAm） on bone metabolism has been paid great attention since its wide and longterm use in the treatment of perimenopausal patients with breast cancer and its attribute of *** studied the effect of tamoxifen treatment on biochemical markers of bone turnover in sexually mature rats subjected sham-operation or ovariectomy for six weeks. mATERIALS AND mETHODS Female Wistar rats 3 months old were sham operated or ovariectomized（OVX） and treated with TAm（20 mg/kg body weight/week subcutaneously）.The rats were randomized into four groups:（1） sham plus

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Nanomanufacturing and metrology 2024年第2期7卷 76-88页

作者： motoya Yoshikawa Saeko Fujii Shotaro Kadoya Tatsuya Sugihara masaki michihata Satoru takahashi Department of Precision Engineering The University of TokyoHongo 7‑3‑1BunkyoTokyo 113‑8656Japan Department of mechanical Engineering Osaka UniversityYamadaoka 2‑1SuitaOsaka 565‑0871Japan

This study proposes a model for the measurement of microscale liquid film thickness distribution using fluorescence *** interfacial conditions between the tool and the workpiece in mechanical machining are important for understanding these phenomena and *** this study,indentation tests with transparent tools were used to observe interfaces;however,it was challenging to obtain the signal from a thin fluorescent liquid film on smooth and steeply inclined ***,fluorescence-based measurement,such as laser-induced fluorescence,was *** measure the absolute thickness of the thin fluorescent film,calibration of the measurement system is ***,a theoretical model was proposed considering the multiple reflections of excitation light and fluorescence at the inclined surface between the indenter and *** measuring the profile of the surface topography of the indented workpiece and comparing the results with those measured by a surface profiler,the validity of the proposed calibration method and the performance of this measurement system were *** measured surface profiles,including scratches of 2–4μm,were in good agreement,demonstrating the validity of the proposed method.

关键词： Laser-induced fluorescence(LIF) Thickness distribution In-situ measurement Lubricant mechanical machining

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日本神户地震前的地下水氡异常

世界地震译丛 1995年第6期26卷 71-72页

作者： G.Igarashi S.Saeki N.Takahata K.Sumikawa S.Tasaka Y.Sasaki m.takahashi Y.Sano 吕春来国家地震局地球物理研究所

在1995年1月17日兵库县南部(神户)地震之前数个月,地下水中的氡浓度增加了。从1994年10月下旬观测开始,到1994年12月底,氡浓度增加了约4倍。在1月8日,即神户地震前9天,氡浓度在开始降低前达到比观测开始时高10倍多的一个峰值。这些氡值... 详细信息

在1995年1月17日兵库县南部(神户)地震之前数个月,地下水中的氡浓度增加了。从1994年10月下旬观测开始,到1994年12月底,氡浓度增加了约4倍。在1月8日,即神户地震前9天,氡浓度在开始降低前达到比观测开始时高10倍多的一个峰值。这些氡值变化可能是这次灾难性地震的前兆现象。

关键词：地震前兆地下水氡异常

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肝内微泡聚集形成的信号强度对鉴别特发性门静脉高压与肝硬化的作用

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国际医学放射学杂志 2009年第5期32卷 502-503页

作者： H.maruyama H.Ishibashi m.takahashi F.Imazeki O.Yokosuka 唐光健 Department of medicine and Clinical Oncology Chiba University Graduate School of Medicine1-8-1InohanaChuou-kuChiba 260-8670Japan

目的研究使用对比剂一增强超声（US）鉴别特发性门静脉高压（IPH）与肝硬化的可能性。材料与方法本研究得到学术委员会批准并取得书面知情同意书。23例[平均年龄（60±11）岁，37-85岁1活检证实的肝硬化病人与10例[平均年龄（65±8）岁... 详细信息

目的研究使用对比剂一增强超声（US）鉴别特发性门静脉高压（IPH）与肝硬化的可能性。材料与方法本研究得到学术委员会批准并取得书面知情同意书。23例[平均年龄（60±11）岁，37-85岁1活检证实的肝硬化病人与10例[平均年龄（65±8）岁，51～78）岁]IPH病人被纳入研究，27例[平均年龄（46±17）岁，26～82岁1无任何肝局灶性病变或门静脉血栓的病人作为对照。

关键词：肝硬化病人门静脉高压特发性信号强度鉴别聚集微泡肝内

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