检索结果-内蒙古大学图书馆

Abstracts for the 6th Congress of Asian Sleep Research Society

Sleep and Biological Rhythms 2009年第4期7卷 A1-A49页

作者： Seog Ju Kim In Kyoon Lyoo Yu-Jin Lee Do-Un Jeong Hirohiko Kanai Masanori Ookubo Atsushi Yoshimura Masako Okawa Noto Yamada Takeshi Munezawa Yoshitaka Kaneita Yoneatsu Osaki Hideyuki Kanda Tadahiro Ohtsu Masumi Minowa Kenji Suzuki Susumu Hijuchi Hiroyuki Suzuki Takashi Ohida Takashi Abe Yoko Komada Shoichi Asaoka Yuichi Inoue Jin-Seong Lee Sang-Yong Cho Deependra Kumar Hruda N. Mallick Velayudhan M. Kumar Mahesh K. Kaushik Akihiro Karashima Noiihiro Katayama Mitsuyuki Nakao Ravindra P. Nagendra Sathiamma Sulekha Sathyaprabha T. Narasappa Pradhan Nityanadan Bindu M. Kutty M. Nirmala P. N. Ravindra Basavaraj Ramappa Tubaki T. N. Sathyaprabha D. Sudhakar G. S. Lavekar C. R. Chandrashekar Kazuyoshi Kitaoka Mika Shimizu Sachiko Chikahisa Kazuo Yoshizaki Hiroyoshi Sei Jong-Won Kim Misa Takegami Shin Yamazaki Yasuaki Hayashino Rei Ono Koji Otani Miho Sekiguchi Shinichi Konno Shunichi Fukuhara Antonia J. Jakobson Paul Fitzgerald Russell Conduit Xin Shirley Li Siu Ping Joyce Lam Wai Man Mandy Yu Yun Kwok Wing Kazue Okamoto-Mizuno Koh Mizuno Mituaki Yamamoto Shuichiro Shirakawa Hirokazu Doi Mikako Kato Kazuyuki Shinohara Masako Tamaki Shiori Matsuda Katsuo Yamazaki Tadao Hori Keiko Ogawa Kazumi Takahashi Kunio Kitahama Katuo Yamazaki Yoshimasa Koyama Kohei Shioda Yugo Ueda Yukiko Nakamura Clara Inoue Kazushige Goto Sunao Uchida Yuko Morita Yoshiko Honda Tohru Kodama Mari Hagihara Toru Nakajima Masato Saito Yoshihiko Koga Shinichiro Tanaka Hiroshi Yamadera Madoka Takahara Sachiko Suwa Minoru Onozuka Sadao Sato Fumiharu Togo Taiki Komatsu Takeshi Mitani Jongbae Choi Bin Zhang Taeko Sasai Hiromi Mitsubayashi Mitsuhiro Ohtsu Isao Hasegawa Tatsuya Ishii Akira Komori Asami Suzuki Yue Nakahara Mitsuyasu Hiroki Mariko Nakauma Nobuo Someya Tomomasa Ochiai Shouhei Komori Rayleigh Ping-Ying Chiang Zai-Ting Yeh Seong T. Kim Seung H. Yoon Jeong S. Kwon Jong H. Choi Hyung J. Ahn Youngsoo Kim Bolortuya Yunren Lichao Chen Radhika Basheer Robert W. Mccarley Robert E. Strecker Makoto Honda Tetsuaki Arai Miyuki Fukazawa Yutaka Honda Kuniaki T Department of Psychiatry Gachon University of Medicine and Science Incheon Republic of Korea Department of Psychiatry Seoul National University Seoul Republic of Korea Department of Neuropsychiatry and Center for Sleep and Chronobiology Seoul National University Hospital Seoul Republic of Korea Department of Neuropsychiatry Seoul National University Hospital Seoul Republic of Korea Seoul National University Hospital Seoul Republic of Korea Department of Psychiatry Shiga University of Medical Science Otsu Japan Division of Public Health Department of Social Medicine Nihon University School of Medicine Tokyo Japan Department of Public Health Nihon University School of Medicine Tokyo Japan Division of Environmental and Preventive Medicine Department of Social Medicine Faculty of Medicine Tottori University Yonago Japan Department of Hygiene and Preventive Medicine Fukushima Medical University Fukushima Japan Department of Public Health Showa University School of Medicine Tokyo Japan Faculty of Humanities Seitoku University Matsudo Japan Section on Behavioral Science Division of Clinical Research National Hospital Organization Kurihama Alcoholism Center Yokosuka Japan Department of Otolaryngology Second Hospital Fujita Health University Nagoya Japan National Hospital Organization Kurihama Alcoholism Center Kanagawa Japan Metropolitan Police Department Criminal Investigation Laboratory Tokyo Japan Japan Somnology Center Neuropsychiatrie Research Institute Tokyo Japan Department of Somnology Tokyo Medical University Tokyo Japan Japan Somnology Center Neuropsychiatric Research Institute Tokyo Japan Department of Somnology Tokyo Medical and Dental University Tokyo Japan Center for Sleep and Chronobiology Department of Psychiatry and Behavioral Science Seoul National University College of Medicine Seoul Republic of Korea Department of Psychiatry and Behavioral Science Center for Sleep and Chronobiology Seoul Republic of Korea Department of Physiology Al

来源：评论

学校读者我要写书评

暂无评论

Cyanate ester nanocomposites: Processing and characterization

Cyanate ester nanocomposites: Processing and characterizatio...

引用

48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and materials Conference

作者： Koo, Joseph H. Lao, Si Chon Cheng, Justin Yong, Jason Ferreira, Paulo Pilato, Louis A. Wissler, Gerry E. Luo, Zhiping University of Texas at Austin Austin TX 78712-0292 KAI LLC Austin TX 78739-1510 Texas A and M University College Station TX 77843-2257 Solid Freeform Fabrication Consortium Department of Mechanical Engineering 1 University Station C2200 Austin TX 78712-0292 AIAA Department of Mechanical Engineering 1 University Station C2200 Austin TX 78712-0292 Materials Science and Engineering Program Department of Mechanical Engineering 1 University Station C2200 Austin TX 78712-0292 6402 Needham Lane Austin TX 78739-1510 Microscopy and Imaging Center College Station TX 77843-2257

ISBN: (纸本)1563478927

In this study, Lonza Corporation's PT-15 cyanate ester (CE), a low viscosity, high performance resin system was used with two types of silicon carbides (SiC): nano-SiC particles and nano-SiC whiskers, as well as multi-wall carbon nanotubes (buckytubes) to create new types of cyanate ester-SiC and cyanate ester-buckytube nanocomposites. High shear mixing techniques were used to uniformly disperse the n-SiC particles, n-SiC whiskers, and buckytubes in the cyanate ester resin matrix. Several processing parameters such as mixing speed and mixing duration were examined to produce optimal uniform dispersions of nanoparticles into the resin matrix. Polymer nanocomposites morphological microstructures were characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM) to determine whether n-SiC particles/n-SiC whiskers/buckytubes are distributed uniformly within the polymer matrix. Thermogravimetric analysis (TGA) was used to study the thermal stability of these nanocomposites. Differential scanning calorimeter (DSC) was used to determine the Tg of the polymer nanocomposites. All levels of n-SiC particles dispersed well in the CE resin. The 10% n-SiC particle gave the best enhancement of thermal stability. All loadings of n-SiC whisker did not exhibit any thermal stability enhancement to the CE resin. Phase separation was observed for all loading levels of CE-buckytubes specimens. Buckytube failed to disperse uniformly in the PT-15 CE because of processing limitations and fundamental material incompabiltiy. Functionalization of the buckytube is recommended to enhance uniform dispersion in the PT-15 CE resin.

关键词： Nanocomposites

来源：评论

学校读者我要写书评

暂无评论

Superconductivity in gallium-substituted Ba8Si46 clathrates

引用

Physical Review B 2007年第5期75卷 054513-054513页

作者： Yang Li Ruihong Zhang Yang Liu Ning Chen Z. P. Luo Xingqiao Ma Guohui Cao Z. S. Feng Chia-Ren Hu Joseph H. Ross, Jr. Department of Physics University of Science and Technology Beijing Beijing 100083 China Department of Engineering Science and Materials University of Puerto Rico at Mayaguez Mayaguez Puerto Rico 00681-9044 USA Department of Physics Texas A&M University College Station Texas 77843-4242 USA Microscopy and Imaging Center Texas A&M University College Station Texas 77843-2257 USA Department of Mathematics University of Texas–Pan American Edinburg Texas 78541 USA

We report a joint experimental and theoretical investigation of superconductivity in Ga-substituted type-I silicon clathrates. We prepared samples of the general formula Ba8Si46−xGax, with different values of x. We show that Ba8Si40Ga6 is a bulk superconductor, with an onset at TC≈3.3K. For x=10 and higher, no superconductivity was observed down to T=1.8K. This represents a strong suppression of superconductivity with increasing Ga content, compared to Ba8Si46 with TC≈8K. Suppression of superconductivity can be attributed primarily to a decrease in the density of states at the Fermi level, caused by a reduced integrity of the sp3-hybridized networks as well as the lowering of carrier concentration. These results are corroborated by first-principles calculations, which show that Ga substitution results in a large decrease of the electronic density of states at the Fermi level, which explains the decreased superconducting critical temperature within the BCS framework. To further characterize the superconducting state, we carried out magnetic measurements showing Ba8Si40Ga6 to be a type-II superconductor. The critical magnetic fields were measured to be HC1≈35Oe and HC2≈8.5kOe. We deduce the London penetration depth λ≈3700Å and the coherence length ξc≈200Å. Our estimate of the electron-phonon coupling reveals that Ba8Si40Ga6 is a moderate phonon-mediated BCS superconductor.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fabrication of BI nanowires using a vacuum melting and mechanical injection technique

Fabrication of BI nanowires using a vacuum melting and mecha...

引用

2006 ASME International Mechanical engineering Congress and Exposition, IMECE2006

作者： Bisrat, Y. Chen, C.C. Luo, Z.P. Chao, C.G. Davis, D. Lagoudas, D. Texas A and M University Department of Aerospace Engineering College Station TX 77843-3141 United States National Chiao Tung University Department of Materials Science and Engineering Hsinchu Taiwan Texas A and M University Microscopy and Imaging Center College Station TX 77843-2257 United States

ISBN: (纸本)0791837904

A mechanical pressure injection technique has been developed to fabricate uniform metallic nanowires in the pores of anodic aluminum oxide (AAO) template. The AAO template was prepared from general purity aluminum by a two-step anodization followed by heat treatment to achieve highly ordered nanochannels. The nanowires were fabricated by an injection process using a hydraulic pressure method. A mold containing the AAO template and a metal foil was placed inside a vacuum chamber and heated up to the melting temperature of the given metal using a hot plate. The hot chamber was then removed from the hot plate and pressure was applied on the melt through the sliding column of the chamber, using a hydraulic jack to impregnate the molten metal into the nanochannels of the AAO. The nanowires were found to be dense and continuous with uniform diameter throughout their length. Diffraction experiment in the transmission electron microscope revealed that individual nanowires are single crystalline. This paper will present the fabrication process of the AAO template, and the fabrication of Bi nanowires as well as their characterization conducted using SEM, TEM, XRD and DSC. Copyright © 2006 by ASME.

关键词： Nanowires

来源：评论

学校读者我要写书评

暂无评论

Analysis of nanoscale deformation in GaAs(100): Towards patterned growth of quantum dots

Analysis of nanoscale deformation in GaAs(100): Towards patt...

引用

2005 materials Research Society Spring Meeting

作者： Taylor, Curtis R. Stach, Eric A. Malshe, Ajay P. Salamo, Gregory Department of Physics Microelectronics-photonics Program University of Arkansas Fayetteville AR 72703 United States National Center for Electron Microscopy Materials Science Division Lawrence Berkeley National Laboratory Berkeley CA 94720 United States Department of Mechanical Engineering Microelectronics-photonics Program University of Arkansas Fayetteville AR 72703 United States Department of Physics University of Arkansas Fayetteville AR 72703 United States School of Materials Engineering Purdue University West Lafayette IN 47907 United States

Nanoindentations were created in the GaAs(100) surface to act as strain centers for the controlled nucleation and patterning of InAs quantum dots. A systematic approach is taken to understand the indent deformation processes that may lead to precision patterning capabilities for a broad range of nanostructures. Indents were generated using loads below 450 μN with a sharp cube corner indenter. Site-specific cross-sectional thinning of nanoindents (down to 100 nm in size) has been achieved using the in-situ 'lift-out' technique. This allowed for observation of subsurface deformation by transmission electron microscopy (TEM). The crystal was observed to deform solely by dislocation activity with no evidence of amorphization, twinning, fracture, or phase transformation. It is shown that the single phase deformation of GaAs can be well characterized and controlled, which should allow for exploitation of the dislocation strain field to bias nucleation of self-assembled quantum dots. © 2005 materials Research Society.

关键词： Nanostructured materials

来源：评论

学校读者我要写书评

暂无评论

Nanocomposites for carbon fiber-reinforced polymer matrix composites

Nanocomposites for carbon fiber-reinforced polymer matrix co...

引用

46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and materials Conference

作者： Koo, Joseph H. Pilato, Louis A. Wissler, Gerry Lee, Andre Weispfenning, Jon T. Abusafieh, Abdel Luo, Zhiping University of Texas at Austin Austin TX 78712-0292 KAI Inc. Austin TX 78739 Michigan State University East Lansing MI 48824-1226 Cytec Engineered Materials Winona MN 55987 Texas A and M University College Station TX 77843-2257 Solid Freeform Fabrication Consortium Mechanical Engineering Dept. University Station C2200 Austin TX 78712-0292 KAI Inc. 6402 Needham Lane Austin TX 78739 Dept. of Chemical Engineering and Materials Science East Lansing MI 48824-1226 Ablative and C/C 501 West Third St. Winona MN 55987 1440 N. Kraemer Blvd. Anaheim CA 92806 Microscopy and Imaging Center BSBW 119 College Station TX 77843-2257

A high temperature damage tolerant epoxy resin system was modified with three types of nanoparticles: chemically modified montmorillonite (MMT) organodays, surface treated nanosilica, and surface modified carbon nanofibers (CNF) to create mew types of epoxy nanocomposites. Wide angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM) were used to determine the degree of dispersion. Dynamic mechanical thermal analysis (DMTA) was used to determine the Tg and complex modulus of the polymer nanocomposites. The TEM analyses indicated that the MMT clay, nanosilica, and CNF dispersed very well in the epoxy resin system. Evidence is presented that a nanophase is formed when nanoparticles such as surface treated clay, surface treated nanosilica, or carbon nanofibers are introduced into the epoxy resin. Higher Tg and complex modulus values from DMTA for the nanomodified materials are presented as evidence for nanophase presence in the epoxy resin system as compared to lower Tg and complex modulus for the epoxy resin control The DMTA data of the neat epoxy nanosilka nanocomposite (2% Aerosil® R202) show the highest Tg (258°C) and the highest complex modulus (964 MPa). Five epoxy nanocomposites and a control were selected to produce prepregs using AS4-6K fabric, followed by fabrication into composite panels. The short beam shear values of all epoxy nanocomposites were slightly lower than the baseline with 3% Aerosil® R202 and 2% PR-19-PS-Ox CNF higher than the baseline. The flexural strength of all the epoxy nanocomposites were slightly lower than the baseline with the 2% Cloisite® 10A and 3% Aerosil® R202 materials higher than the baseline. Flatwise tension strength values of all the eposy nanocomposites were slightly lower than the baseline with 2% PR-19-PS-Ox and 2% Aerosil® R202 samples higher than the baseline material. The G1c and G2c values of all the epoxy nanocomposites were below the baseline with the least knockdown for 2% Aerosil®

关键词： Fiber reinforced plastics

来源：评论

学校读者我要写书评

暂无评论

Nanocomposite rocket ablative materials: Processing, characterization, and performance

Nanocomposite rocket ablative materials: Processing, charact...

引用

Advancing materials in the Global Economy - Applications, Emerging Markets and Evolving Technologies

作者： Koo, J.H. Stretz, H. Bray, A. Weispfenning, J. Luo, Z.P. Wootan, W. Texas A and M University Department of Mechanical Engineering College Station TX 77843 Southwest Texas State University Inst. for Environ./Indust. Science San Marcos TX 78666 Syst./Materials Research Consultancy 19300 Crosswind Circle Spicewood TX 78669 Cytec Engineered Materials Winona MN 55987 Texas A and M University Microscopy and Imaging Center College Station TX 77843

Nanocomposite Rocket Ablative materials (NRAMs) exploit the ablation resistance of both phenolic and nanoparticles. The objective of this material development is a new class of nanostructured material that is lighter and has better erosion and insulation characteristics than current ablatives. Borden Chemical's SC-1008, a resole phenolic, was selected as the resin for this investigation. Several nanoparticles such as montmorillonite (MMT) nanoclays, carbon nanofibers (CNFs), and polyhedral oligomeric silsesquioxane (POSS®) have been evaluated with the SC-1008 phenolic resin. Wide angle X-ray diffraction and transmission electron microscopy were used as screening tools to determine the degree of dispersion before producing prepregs for testing. Cytec Engineered materials fabricated several MX-4926 alternates by replacing the carbon black filler with selected nanoparticles. Several NRAMs showed good performance improvements in erosion rate and heat-soaked temperature rise over MX-4926 (baseline).

关键词： Rockets

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：