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Temperature measurement of GaN-based blue-violet laser diodes in operation by Raman microprobe

physica status solidi c 2007年第7期4卷

作者： Kenji Takahashi Daisuke Matsuoka Hiroshi Harima Kenji Kisoda Yuhzoh Tsuda Takayuki Yuasa Mototaka Taneya Department of Electronics and Information Science Kyoto Institute of Technology Kyoto 606-8585 Japan Faculty of Education Wakayama University Wakayama 640-8510 Japan Advanced Technology Research Laboratories Sharp Corporation Tenri Nara 632-8567 Japan Compound Semiconductor Systems Division Sharp Corporation Mihara Hiroshima 729-0474 Japan

Blue-violet GaN-based laser diodes have been characterized by microscopic Raman scattering to obtain temperature distributions in the chip during operation. The local temperature increased steeply in the vicinity of the light-emitting layer at distance < ∼20 μm. At injection current I = 120 mA with laser output of 150 mW, the local temperature at the light emitting layer was about 50 °C higher than that of the chip mount, 25 °C. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

关键词： 42.55.Px 78.30.Fs

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High fidelity tools for rescue robotics: Results and perspectives

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作者： Carpin, Stefano Wang, Jijun Lewis, Michael Birk, Andreas Jacoff, Adam School of Engineering and Science International University Bremen Germany Department of Information Science and Telecommunications University of Pittsburgh United States Intelligent Systems Division National Institute of Standards and Technology United States

ISBN: (纸本)9783540354376

USARSim is a high fidelity robot simulation tool based on a commercial game engine. We illustrate the overall structure of the simulator and we argue about its use as a bridging tool between the RoboCupRescue Real Robot League and the RoboCupRescue Simulation League. In particular we show some results concerning the validation of the system. Algorithms useful for the search and rescue task have been developed in the simulator and then executed on real robots providing encouraging results. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Robots

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An Implementation of a System for Learning Musical Scores

An Implementation of a System for Learning Musical Scores

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International Conference on information technology Based Higher Education and Training, ITHET

作者： Satoko Amemiya Keiichi Kaneko Department of Computer and Information Sciences Faculty of Engineering Tokyo University of Agriculture슠and슠Technology Koganei Tokyo Japan Division of Systems and Information Technology Institute of Symbiotic Science and Technology Tokyo University of Agriculture슠and슠Technology Koganei Tokyo Japan

In this study, we proposed and implemented an online educational system MSL (musical-score learning), by which users can understand not only the sound pitches but also the note values. The MSL system does not require any special device, and it is available by using an ordinary personal computer. We conducted two evaluation experiments with twenty-seven novice users and proved the effectiveness of the MSL system

关键词： Rhythm Educational technology Instruments Agriculture Microcomputers Agricultural engineering information technology Symbiosis Computer displays Presses

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Prediction of modulus by considering distribution of cell shape

Prediction of modulus by considering distribution of cell sh...

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Society of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006

作者： Yamaguchi, Kazumi Goto, Akihiko Ishiaku, Umaru S. Hamada, Hiroyuki Industrial Technology Center of Wakayama Prefecture 60 Ogura Wakayama 649-6261 Japan Department of Information Systems Engineering Osaka Sangyo University 3-1-1 Nakagaito Daito Osaka 574-8530 Japan Division of Advanced Fibro-Science Graduate School Kyoto Institute of Technology Sakyo-ku Kyoto 606-8585 Japan

The distribution of the cell shape in the polyurethane foam was measured by using the image processing method. In addition, the cell shape was simply modeled. The analysis limited within the range of elasticity was done by using this model. As a result, the prediction of the mechanical properties was tried by applying the rule of mixture to the foam. The validity was examined.

关键词： Polyurethanes

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Analysis of a long-range random field quantum antiferromagnetic Ising model

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The European Physical Journal B - Condensed Matter and Complex systems 2006年第3期51卷 321-329页

作者： Chakrabarti, B. K. Das, Arnab Inoue, Jun-ichi Theoretical Condensed Matter Physics Division Saha Institute of Nuclear Physics Kolkata India Complex Systems Engineering Graduate School of Information Science and Technology Hokkaido University Sapporo Japan

We introduce a solvable quantum antiferromagnetic model. The model, with Ising spins in a transverse field, has infinite range antiferromagnetic interactions and random fields on each site following an arbitrary distribution. As is well-known, frustration in the random field Ising model gives rise to a many valley structure in the spin-configuration space. In addition, the antiferromagnetism also induces a regular frustration even for the ground state. In this paper, we investigate analytically the critical phenomena in the model, having both randomness and frustration and we report some analytical results for it.

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Workshop on imaging science development for cancer prevention and preemption

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Cancer Biomarkers 2007年第1期3卷 1-33页

作者： Kelloff, Gary J. Sullivan, Daniel C. Baker, Houston Clarke, Lawrence P. Nordstrom, Robert Tatum, James L. Dorfman, Gary S. Jacobs, Paula Berg, Christine D. Pomper, Martin G. Birrer, Michael J. Tempero, Margaret Higley, Howard R. Petty, Brenda Gumbs Sigman, Caroline C. Maley, Carlo Sharma, Prateek Wax, Adam Ginsberg, Gregory G. Dannenberg, Andrew J. Hawk, Ernest T. Messing, Edward M. Grossman, H. Barton Harisinghani, Mukesh Bigio, Irving J. Griebel, Donna Henson, Donald E. Fabian, Carol J. Ferrara, Katherine Fantini, Sergio Schnall, Mitchell D. Zujewski, Jo Anne Hayes, Wendy Klein, Eric A. DeMarzo, Angelo Ocak, Iclal Ketterling, Jeffrey A. Tempany, Clare Shtern, Faina Parnes, Howard L. Gomez, Jorge Srivastava, Sudhir Szabo, Eva Lam, Stephen Seibel, Eric J. Massion, Pierre McLennan, Geoffrey Cleary, Kevin Suh, Robert Burt, Randall W. Pfeiffer, Ruth M. Hoffman, John M. Roy, Hemant K. Wang, Thomas Limburg, Paul J. El-Deiry, Wafik S. Papadimitrakopoulou, Vali Hittelman, Walter N. MacAulay, Calum Veltri, Robert W. Solomonzz, Diane Jeronimo, Jose Richards-Kortum, Rebecca Johnson, Karen A. Viner, Jaye L. Stratton, Steven P. Rajadhyaksha, Milind Dhawan, Atam NIH/NCI/DCTD Cancer Imaging Program Bethesda MD United States NIH/NCI/DCTD Cancer Imaging Program NCI-Frederick Frederick MD United States NIH/NCI/DCP Early Detection Research Group Bethesda MD United States The Johns Hopkins University School of Medicine Departments of Radiology Pharmacology and Oncology Division of Neuroradiology Baltimore MD United States NIH/NCI/CCR Cell and Cancer Biology Branch Bethesda MD United States University of California San Francisco Department of Medicine Division of Medical Oncology San Francisco CA United States CCS Associates Inc. Mountain View CA United States Wistar Institute Molecular and Cellular Oncogenesis Program Philadelphia PA United States University of Kansas School of Medicine VA Hospital Kansas City MO United States Duke University Department of Biomedical Engineering Medical Physics Program Durham NC United States University of Pennsylvania School of Medicine Department of Gastroenterology Philadelphia PA United States New York Presbyterian Hospital Weill Medical College of Cornell University New York NY United States NIH/NCI/OD Office of Centers for Training and Resources Bethesda MD United States University of Rochester Medical Center Department of Urology Rochester NY United States University of Texas MD Anderson Cancer Center Department of Urology Houston TX United States Massachusetts General Hospital Abdominal Imaging/Interventional Radiology Boston MA United States Boston University Biomedical Engineering Electrical and Computer Engineering and Physics Boston MA United States NIH/NCI/DCP Gastrointestinal and Other Cancers Research Group Bethesda MD United States The George Washington University Cancer Institute Office of Cancer Prevention and Control Washington DC United States University of Kansas Cancer Center Clinical Oncology Kansas City KS United States University of California Davis Department of Biomedical Engineering Davis CA United States Tufts University De

The concept of intraepithelial neoplasm (IEN) as a near-obligate precursor of cancers has generated opportunities to examine drug or device intervention strategies that may reverse or retard the sometimes lengthy process of carcinogenesis. Chemopreventive agents with high therapeutic indices, well-monitored for efficacy and safety, are greatly needed, as is development of less invasive or minimally disruptive visualization and assessment methods to safely screen nominally healthy but at-risk patients, often for extended periods of time and at repeated intervals. Imaging devices, alone or in combination with anticancer drugs, may also provide novel interventions to treat or prevent precancer.

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Graphical Gaussian modeling for gene association structures based on expression deviation patterns induced by various chemical stimuli

Graphical Gaussian modeling for gene association structures ...

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作者： Matsuno, Tetsuya Tominaga, Nobuaki Arizono, Koji Iguchi, Taisen Kohara, Yuji Dept. of Electronics and Info. Eng. Ariake Natl. College of Technology Omuta-shi 836-8585 Japan Department of Electronics and Information Engineerin Ariake National College of Technology Omuta-shi 836-8585 Japan Div. of Food and Health Environment Fac. of Environ. and Symbiotic Sci. Prefectural University of Kumamoto Kumamoto-shi 862-8502 Japan Dept. of Bio-enviromental Research Center for Integrative Bioscience National Institute for Basic Biology Okazaki-shi 444-8585 Japan Structural Biology Center National Institute of Genetics Mishima-shi 411-8540 Japan Department of Electronics and Information Engineering Ariake National College of Technology Japan Department of Chemical and Biological Engineering Ariake National College of Technology Japan Division of Food and Health Environment Faculty of Environmental and Symbiotic Sciciences Prefectural University of Kumamoto Japan Okazaki Institute Integrative Bioscience National Institutes of Natural Science Japan Structural Biology Center National Institute of Genetics Japan

Activity patterns of metabolic subnetworks, each of which can be regarded as a biological function module, were focused on in order to clarify biological meanings of observed deviation patterns of gene expressions induced by various chemical stimuli. We tried to infer association structures of genes by applying the multivariate statistical method called graphical Gaussian modeling to the gene expression data in a subnetwork-wise manner. It can be expected that the obtained graphical models will provide reasonable relationships between gene expressions and macroscopic biological functions. In this study, the gene expression patterns in nematodes under various conditions (stresses by chemicals such as heavy metals and endocrine disrupters) were observed using DNA microarrays. The graphical models for metabolic subnetworks were obtained from these expression data. The obtained models (independence graph) represent gene association structures of cooperativities of genes. We compared each independence graph with a corresponding metabolic subnetwork. Then we obtained a pattern that is a set of characteristic values for these graphs, and found that the pattern of heavy metals differs considerably from that of endocrine disrupters. This implies that a set of characteristic values of the graphs can representative a macroscopic biological meaning. Copyright © 2006 The institute of Electronics, information and Communication Engineers.

关键词： Metabolism

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Small helicon source for electrocleless plasma production and electromagnetic acceleration

Small helicon source for electrocleless plasma production an...

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AIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference

作者： Toki, Kyoichiro Hashimoto, Takashi Makita, Kenji Shinohara, Shunjiro Hada, Tohru Ikeda, Yasushi Tanikawa, Takao Shamrai, Konstantin P. Funaki, Ikkho Tokyo University of Agriculture and Technology Koganei-city Tokyo 184-8588 Japan Kyushu University Fukuoka Fukuoka 816-8580 Japan Tokai University Hiratsuka Kanagawa 259-1292 Japan Institute for Nuclear Research Kiev 03680 Ukraine Japan Aerospace Exploration Agency Sagamihara Kanagawa 229-8510 Japan Department of Mechanical Systems Engineering Institute of Symbiotic Science and Technology 2-24-16 Naka-cho Koganei-city Tokyo Mechanical Systems Engineering 2-24-16 Naka-cho Koganei-city Tokyo Department of Advanced Energy Engineering Science Interdisciplinary Graduate School of Engineering Sciences 6-1 Kasuga-koen Kasuga Fukuoka Department of Earth System Science and Technology Interdisciplinary Graduate School of Engineering Sciences 6-1 Kasuga-koen Kasuga Fukuoka Research Institute of Science and Technology 1117 Kitakaname Hiratsuka Kanagawa Department of Plasma Theory Institute for Nuclear Research National Academy of Sciences of Ukraine 47 Prospect Nauki Kiev Research Division for Space Transportation Institute of Space and Astronautical Scinece 31-1 Yoshinodai Sagamihara Kanagawa AIAA

ISBN: (纸本)1563478188

A compact helicon source having an inner diameter of 2.5 cm with 46 cm long glass tube was investigated using a Boswell type antenna. Argon gas was fed into the glass tube from the upstream end at inner pressures, 10-40 mTorr corresponding to the mass flow rates, 0.5-2 mg/s. Two apparent jumps were observed with increasing RF power. The first jump took place at about 200 W RF input, from capacitively coupled plasma (CCP) to inductively coupled plasma (ICP), and the second jump was encountered at about 500 W RF input power from ICP to presumably the helicon mode. The maximum applied magnetic field was 800 gauss. The achieved plasma density exceeded 1013 cm-3 at the expected helicon mode. Based upon this result, a few concepts of electrodeless plasma acceleration techniques were suggested and also simulated by analyses. A preliminary experiment of the acceleration for proof-of-concept was conducted.

关键词： Helicons

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Evaluation of the Effect of Visual Stimulation on Humans by Simultaneous Experiment with Multiple Subjects

Evaluation of the Effect of Visual Stimulation on Humans by ...

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： N. Sugita M. Yoshizawa A. Tanaka K. Abe S. Chiba T. Yambe S. Nitta Department of Electrical and Communication Graduate School of Engineering University of Tohoku Sendai Japan Research Division on Advanced Information Technology Information Synergy Center University of Tohoku Sendai Japan Department of Human Support System Faculty of Symbiotic Systems Science Fukushima University Fukushima Japan College of Engineering Nihon University Koriyama Japan Sharp Corporation Chiba Japan Institute of Development Aging and Cancer University of Tohoku Sendai Japan

To evaluate the biological effects of visual stimulation on multiple subjects watching a same image, a more compact and low-cost device measuring both ECG and photo-plethysmogram was developed. On the basis of these physiological parameters, the maximum cross-correlation coefficient, rho max , from pulse wave transmission time to heart rate could be calculated. This index reflects the activity of the autonomic nervous system and is considered as a good index for evaluating the effect of visual stimulation on humans. The result of simultaneous experiment with 6 subjects watching a video image taken by an intentionally swaying handy camera has shown that rho max of almost all subjects decreased in the latter part of the video image and that rho max of the subjects who felt motion sickness strongly decreased after watching the video image at a time

关键词： Humans Blood pressure Biomedical engineering Electrocardiography Heart rate Pressure measurement Autonomic nervous system Cameras Psychology Image analysis

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Frustrated magnetic vortices in a triad of permalloy rings: Magneto-optical Kerr effect, magnetic force microscopy, and micromagnetic simulations

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Physical Review B 2006年第9期73卷 094442-094442页

作者： V. Rose K. Buchanan S.-H. Chung M. Grimsditch V. Metlushko A. Hoffmann V. Novosad S. D. Bader H. Ibach Institute for Surfaces and Interfaces (ISG 3) and Center of Nanoelectronic Systems for Information Technology (CNI) Research Center Jülich D-52425 Jülich Germany Material Science Division and Center for Nanoscale Materials Argonne National Laboratory Argonne Illinois 60439 USA Electrical and Computer Engineering University of Illinois at Chicago Chicago Illinois 60612 USA

The field dependent magnetization of three mutually touching permalloy rings were investigated by means of the magneto-optical Kerr effect, magnetic force microscopy, and micromagnetic simulations. Each ring has a width of 0.2–1.8μm, an outer diameter of 4μm, and a thickness of 17nm. Decreasing an applied magnetic field from saturation leads to the nucleation and annihilation of magnetic vortices, leaving at least one ring in a magnetically frustrated state. The properties of the magnetization reversal strongly depend on the ring width and on the direction of the applied field. Multiple complex reversal paths with vortexlike magnetization configurations are found.

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