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Conference on Lasers and Electro-Optics Europe (CLEO EUrOPE)

作者： Yoshiro Ito daisuke Miyata rie Tanabe Masahiro Ichihara Yoshiko Abe Eiichi Matsumoto Tetsuya Taima Yuji Yoshida Atsushi Masuda Department of Mechanical Engineering Nagaoka University of Technology Nagaoka Niigata Japan R&D Center Tokki Corporation Mitsuke Niigata Japan National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki Japan

ISBN: (纸本)9781424440801

An organic thin film photovoltaic cell (OPV) consists of many thin layers of quite different materials: glass substrate, transparent electrode such like indium tin oxide (ITO), organic molecules such like copper phthalocyanine (CuPc), fullerene (C60) and metal (Me), etc. Unit structure of the OPV generates voltage less than 0.5V, and thus it is required to construct a module in which the units form a tandem series. The tandem structure preferably be formed 'in plane' rather than vertical stacking form.

关键词： Machining Transistors Photovoltaic cells Optical pulses Indium tin oxide Inorganic materials Optical materials Organic materials Glass Substrates

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Macroscopic generation of attosecond-pulse trains in strongly ionized media

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Physical review A 2009年第4期79卷 043828-043828页

作者： V. Tosa K. T. Kim C. H. Nam Department of Physics KAIST Yuseong-gu Daejeon 305-701 Korea National Institute for R&D of Isotopic and Molecular Technologies 400293 Cluj-Napoca Romania Advanced Photonics Research Institute and Center for Femto-Atto Science and Technology GIST Gwangju 500-712 Korea

The characteristics of attosecond-pulse trains (APT) obtained from high-order harmonics are investigated by using a nonadiabatic three-dimensional model. A time-dependent phase matching approach is used in order to analyze the macroscopic formation of the APT. Under high ionization conditions, the process of APT formation is found to be the result of an interlace among the driving laser field, single atom response, phase matching effects in the near field and burst interference in the far field.

关键词： Phase matching

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Analysis Method of Motion Accuracy Using NC System with Synchronized Measurement of Tool-Tip Position

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International Journal of Automation technology 2009年第4期3卷 394-400页

作者： Nagaoka, Kotaro Matsubara, Atsushi Fujita, Tomoya Sato, Tomonori Advanced Technology R&D Center Mitsubishi Electric Corporation 8-1-1 Tsukaguchi-honmachi Hyogo Amagasaki661-8661 Japan Department of Micro Engineering Graduate School of Engineering Kyoto University Yoshida-honmachi Sakyo-ku Kyoto606-8501 Japan

This paper describes a method of measuring and an-alyzing the motion accuracy of NC machine tools. A practical method of measuring the motion accuracy is required for the achievement of high precision machining. The motion accuracy of NC machine tools becomes an issue, as motion error emerges while a continuous path control is applied. Error is caused by several factors. In order to determine the effects of each cause, it is necessary to measure the differences among reference positions, feedback positions, and tool tip positions. Thus, a system of measurement that achieves synchronized acquisition of each of the aforementioned positions has been developed. The system is composed of the NC system, which can manage the reference position and the feedback position, and an additional sensor data acquisition system, which receives the tool tip position. A method of analyzing the acquired data to determine the motion accuracy is also proposed. Experimental results show the effectiveness of the proposed method. © 2009. Fuji technology Press Ltd.

关键词： data acquisition

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Project report: Toward the realization of Highly reliable Embedded Systems

Project Report: Toward the Realization of Highly Reliable Em...

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International Symposium on Object-Oriented real-Time distributed Computing

作者： Takuya Katayama Tomoji Kishi Shintaro Hosoai Tatsuo Nakajima Taiichi Yuasa Midori Sugaya Tomoharu Ugawa Japan Advanced Institute of Science and Technology Ishikawa Japan Department of Information Science Japan Advanced Institute of Science and Technology Ishikawa Japan Department of Computer Science and Engineering Waseda University Tokyo Japan Graduate School of Informatics Kyoto University Kyoto Japan Dependable Embedded OS R&D Center Japan Science and Technology Agency Tokyo Japan Department of Computer Science University of Electro-Communications Tokyo Japan

ISBN: (纸本)9781424435715

Our society depend on embedded and ubiquitous computing and the reliability of embedded software becomes more and more important. We have conducted a five years project with industries to develop software for realizing highly reliable embedded systems. We have tackled reliability issues from the following aspects. (1)design environment: we have developed a UML design verification tool that apply model checking techniques to improve the design quality of application software. (2)Operating environment: we have developed operating system supports that realize multiple execution of real-time operating systems and also developed operating systems with enhanced resource management. Both technologies contribute the realization of robust run-time environment. (3) real-time environment: we have developed real-time garbage collection techniques for Jave. They prevent the suspension of applications that violates the correct behavior of real-time applications. Also, they reduce the effort of application programmers to avoid garbage-collection during important execution timing. We have obtained fruitful results from these three research themes, and some of them are actually used in industries. Furthermore, we have integrated the results to make synergetic effect of them. In order to demonstrate the effectiveness, we have conduct an experiment. In this paper, we introduce the project and its results.

关键词： Embedded system Operating systems Embedded software Ubiquitous computing Computer industry Unified modeling language Application software real time systems resource management robustness

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Gelation of Photonic Microdomain Structures Formed in Semi-dilute Solutions of Ultra-High-Molecular-Weight Polystyrene-b-Polybutadiene with Various Polybutadiene Contents

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IOP Conference Series: Materials Science and Engineering 2010年第1期14卷

作者： S Okamoto S Ito K Ando M Mouri A Ikeda H Hasegawa N Koshikawa Materials Science and Engineering Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya 466-8555 JAPAN ISS Advanced materials research and Application center Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya 466-8555 JAPAN To whom any correspondence should be addressed Photoproducts R&D Department Asahi KASEI E-materials Corp. 2-1 Samejima Fuji 416-8501 JAPAN Electronics Materials Division Asahi KASEI E-materials Corp. 2-1 Samejima Fuji 416-8501 JAPAN Department of Polymer Chemistry Graduate School of Engineering Kyoto University Kyoto-daigaku Katsura A3-014 Nishikyo-ku Kyoto 615-8530 JAPAN Space Environment Utilization Center Tsukuba Space Center Japan Aerospace Exploration Agency 2-1-1 Sengen Tsukuba-shi Ibaraki 305-8505 JAPAN

Well-ordered microdomain structures were obtained in semi-dilute solutions and successfully stabilized by gelation. We used polystyrene-b-polybutadiene (PS-b-PB) diblock copolymer with the weight-averaged molecular weight varying from several hundred thousands to millions g/mol. The solutions had iridescent colors because the domain spacing is on the order of the wavelength of visible light. As the structures are susceptible to distortion by flow or vibration, structural fixation was carried out by gelation. The polybutadiene used has the microstructure of 1,2-linkage and hence the chains can be cross-linkable. The Small-Angle X-ray Scattering and the UV-vis spectroscopic measurements showed that in the case of PS-b-PBs with the PB volume fraction, PB, greater than about 50 vol % the microdomain structures were successfully fixed by gelation, while largely distorted in the case of those with PB < ca. 50 vol %. The SAXS scattering intensities were quantitatively analyzed by the scattering functions numerically calculated based on the one- and two-dimensional paracrystal theories and on the concentration fluctuation between the polymers and the solvent molecules.

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development of single-package 1.3/1.49 μm Bi-directional device

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SEI Technical review 2008年第67期 33-38页

作者： Kihara, Toshiaki Suzuki, Michio Shiozaki, Manabu Yoshida, Kyohiro Matsumura, Yutaka Nakanishi, Hiromi Yoshimura, Manabu Fiber-optic Core Devices R and D Department Transmission Devices R and D Laboratories Advanced Technology Group Analysis Technology Reseach Center Lightwave Device Technology Department Optical Transmission Components Division Multi-functional Device Development Group Fiber-optic Core Devices R and D Department Transmission Devices R and D Laboratories

Optical access services are expanding quickly in Japan and North America. Passive optical network (PON) systems that allow one optical fiber to be shared between two or more users at low service prices have been adopted in optical access services. Sumitomo Electric is one of the manufacturers of Bi-directional transceiver devices used in PON systems. On the other hand, in the case of systems for supporting point-to-point communication schemes such as Ethernet where two optical fibers are generally used for transmission and reception, there is rising demand for transceivers that use one fiber in different wavelengths. In order to satisfy this market demand, Sumitomo Electric has developed a new transceiver device design. Compared to the conventional transceiver design composed of separate packages, the new "one package" design realizes a capacity reduction of about 30%. This paper reports on Sumitomo Electric's development of optical network unit (ONU) and optical line terminal (OLT) products for gigabit Ethernet communication systems using the new transceiver design.

关键词： Optical fibers

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Heat Transfer between Casting and die during High Pressure die Casting Process of AM50 Alloy-Modeling and Experimental results

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Journal of Materials Science & technology 2008年第1期24卷 131-135页

作者： Zhipeng GUO Shoumei XIONG Sang-Hyun Cho Jeong-Kil Choi Key Laboratory for Advanced Manufacturing by Materials Processing Technology Department of Mechanical Engineering Tsinghua University Beijing 100084 China Advanced Material R＆D Center Korean Institute of Industrial Technology 994-32 Dongchun-Dong Yonsu-Ku Inchon Korea

A method based on die casting experiments and mathematic modeling is presented for the determination of the heat flow density （HFd） and interfacial heat transfer coefficient （IHTC） during the high pressure die casting （HPdC） *** were carried out using step shape casting and a commercial magnesium alloy,*** profiles were measured and recorded using thermocouples embedded inside the die. Based on these temperature readings,the HFd and IHTC were successfully determined and the calculation results show that the HFd and IHTC at the metal-die interface increases sharply right after the fast phase injection process until approaching their maximum values,after which their values decrease to a much lower level until the dies are *** patterns of heat transfer behavior were found between the die and the casting at different *** thinner the casting was,the more quickly the HFd and IHTC reached their steady ***,the values for both the HFd and IHTC values were different between die and casting at different thicknesses.

关键词：： Interfacial heat transfer coefficient High pressure die casting process AM50 Magnesium alloy

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Evaluation the Properties of Titanium Matrix Composites by Melting route Synthesis

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Journal of Materials Science & technology 2008年第1期24卷 105-109页

作者： Bong-Jae Choi Si-Young Sung Myoung-Gyun Kim Young-Jig Kim Department of Advanced Materials Engineering Sungkyunkwan University SuwonKorea Department of Advanced Materials Engineering Sungkyunkwan University SuwonKorea Materials & Processing Engineering CenterR&D DivisionKorea Automotive Technology InstituteChonanChungnamKorea Research Institute of Industrial Science and Technology Pohang Korea

The main purpose of this study is an in-situ synthesis of （TiB＋TiC） hybrid titanium matrix composites （TMCs） by vacuum induction melting method and to verify its mechanical *** melting route was adopted to synthesize the commercial pure titanium （cp Ti） and granular boron carbide （B-4C）.The reinforcements,the fraction of 10 ***,were formed by adding 1.88 wt pct B-4C to cp *** in-situ synthesis of TMCs,electron probe micro-analysis elemental mapping was carried out to confirm the distribution and shape of *** cone-on-disk type sliding wear test was also done for the identification of *** is concluded that （TiB＋TiC） hybrid TMCs can be in-situ synthesized and has better wear properties than H13.

关键词： Titanium matrix composites H13 In-situ Wear

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Evaluation of Alpha-case in Titanium Castings

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Journal of Materials Science & technology 2008年第1期24卷 70-74页

作者： Si-Young Sung Bong-Jae Choi Beom-Suck Han Han-dun Oh Young-Jig Kim Materials & Processing Engineering Center R&D Division Korea Automotive Technology InstituteChonanChungnamKorea Department of Advanced Materials Engineering Sungkyunkwan University SuwonKorea Department of Materials Science Hanseo University Seosan 352-820Korea

The alpha-case formation reactions between Ti and investment molds （Al-2O-3,ZrSiO-4,ZrO-2,CaO stabilized ZrO-2） were evaluated in a plasma arc melting *** of thermodynamic approaches,there were distinct alpha-case *** reaction products were characterized by electron probe micro-analysis and transmission electron ***α-case generation between Ti and Al-2O-3 mold was not able to be explained by the conventionalα-case formation mechanism,which is known to be formed by the interstitials,especially oxygen dissolved from mold ***,from our experimental results and thermodynamic calculations,it was confirmed that theα-case is formed not only by an interstitial element but also by substitutional metallic elements dissolved from mold *** newly establishedα-case formation mechanism will surely lead to a variety of significant applications of theα-case controlled Ti casting.

关键词： Titanium Casting Alpha-case Net-shape

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Absorption saturation of AlN-based waveguide utilizing intersubband transition in GaN/AlN quantum wells

Absorption saturation of AlN-based waveguide utilizing inter...

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OptoElectronics and Communications Conference, OECC

作者： Norio Iizuka Toshimasa Shimizu Chaiyasit Cumtornkittikul Masakazu Sugiyama Yoshiaki Nakano Corporate R&D Center Toshiba Corporation Kawasaki Japan Research Center for Advanced Science and Technology The University of Tokyo 153-8904 Japan Department of Electronic Engineering University of Tokyo Tokyo Japan

An AlN-based intersubband optical switch was investigated. Narrow absorption spectrum and low insertion loss were obtained. Absorption saturation by 10 dB was achieved at a wavelength of 1.42 mum with an energy of 50 pJ.

关键词： Gallium nitride Absorption Quantum well devices Optical switches Optical waveguides Insertion loss Molecular beam epitaxial growth

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