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2009 6th IEEE Consumer Communications and Networking Conference, CCNC 2009

作者： Syafei, W.A. Yohena, R. Shimajiri, H. Yoshida, T. Kurosaki, M. Nagao, Y. Sai, B. Ochi, H. Department of Information Engineering University of the Ryukyus 1 Senbara Nishihara Okinawa 903-0213 Japan Frontier Okinawa 21 Co. Ltd. 2-3-6 Mekaru Naha Okinawa 900-0004 Japan Department of Computer Science and Electronics Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan Radrix Co. Ltd. Japan

ISBN: (纸本)9781424423095

This paper presents our investigation on performance enhancement due to the implementation of low density parity check (LDPC) codes on IEEE 802.11n system and its Application Specific Integrated Circuit design. Simulation result shows that in higher coding rate, LDPC codes gives 6 dB better performance compared to binary convolutional codes. Logic synthesis is succesfully done on 0.13 μm CMOS technology with low-power standard cell library. ©2009 IEEE.

关键词： Logic Synthesis

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Performance improvement of double-layer networks with holographic optical switches

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WSEAS Transactions on Communications 2009年第7期8卷 566-577页

作者： Lee, Chi-Ping Chang, Chien-Ping Deng, Jiun-Shiou Lu, Ming-Feng Huang, Yang-Tung Dept. of Electronic Engineering Minghsin University of Science and Technology No. 1 Hsinshing Rd. Hsinfeng Hsinchu 304 Taiwan Dept. of Computer Science and Information Engineering Minghsin University of Science and Technology Department of Electrical Engineering National Defense University Dept. of Electronics Engineering and Institute of Electronics National Chiao-Tung University

In our previous research, combining the unique features of the double-layer network and holographic optical switches not only reduces the volume of the whole system and eliminates all interconnection lines and crossovers significantly, but also reduces the number of drivers from N2/ 4+2Nlog2N-2N to 2Nlog2N. In this paper, modifying the structures of the holographic optical switches to satisfy the characteristics of the double-layer network, the system insertion loss can be minimized significantly from (2log2N-1)(ZPBS+2ZEOHWP) to (2log2N-2)ZPBS+2(log2N)ZEOHWP (dB). After rearranging the channels, the number of electro-optic halfwave plates can be decreased significantly from 2N2-2N to 2Nlog2N.

关键词： Optical switches

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics): Preface

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2009年 5630 LNCS卷 vi页

作者： Mauthe, Andreas Zeadally, Sherali Cerqueira, Eduardo Curado, Marilia Computing Department Lancaster University Lancaster LA1 4WA United Kingdom Department of Computer Science and Information Technology University of the District of Columbia Washington DC 20008 United States Department of Informatics Engineering 3030-290 University of Coimbra Coimbra Portugal

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A scalable anonymous protocol for heterogeneous wireless ad hoc networks

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Journal of Embedded Computing 2009年第1期3卷 77-85页

作者： Durresi, Mimoza Paruchuri, Vamsi Durresi, Arjan Barolli, Leonard Takizawa, Makoto Department of Information and Communication Engineering Fukuoka Institute of Technology 3-30-1 Wajiro-Higashi Higashi-ku Fukuoka 811-0295 Japan Department of Computer Science Louisiana State University 298 Coates Hall Baton Rouge LA 7803 USA Department of Computers and Systems Engineering Tokyo Denki University Ishizaka Hatoyama Saitama 350-0394 Japan

Ensuring anonymity in wireless and hoc networks is a major security goal. Using traffic analysis, the attacker can compromise the network functionality by correlating data flow patterns to event locations/active areas. In this paper we present a novel Scalable Anonymous Protocol that hides the location of nodes and obscure the correlation between event zones and data flow from snooping adversaries. We quantify the anonymity strength of our protocol by introducing a new anonymity metric: Degree of Exposure Index. Our protocol is designed to offer flexible tradeoffs between degree of anonymity and communication-delay overhead.

关键词： Anonymity privacy sensor networks wireless networks

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Editorial

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International Journal of Communication Networks and Distributed Systems 2009年第4期2卷 353-354页

作者： Hara, Takahiro Madria, Sanjay Department of Multimedia Engineering Graduate School of Information Science and Technology Osaka University 1-5 Yamadaoka Suita Osaka 565-0871 Japan Computer Science Department Missouri University of Science and Technology 500 W. 15th St. Rolla MO 65409-0350 United States

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A recommendation method considering users' time series contexts 09

A recommendation method considering users' time series conte...

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3rd International Conference on Ubiquitous information Management and Communication, ICUIMC'09

作者： Oku, Kenta Nakajima, Shinsuke Miyazaki, Jun Uemura, Shunsuke Kato, Hirokazu Graduate School of Information Science Nara Institute of Science and Technology Ikoma City Nara 630-0101 Japan Faculty of Computer Science and Engineering Kyoto Sangyo University Motoyama Kamigamo Kita-Ku Kyoto-City 603-8555 Japan Department of Informatics Faculty of Informatics Nara Sangyo University 12-1 Tatsuno-kita 3-chome Sango-cho Ikoma-gun Nara 636-8503 Japan

ISBN: (纸本)9781605584058

This paper proposes a recommendation method considering users' time series contexts which are situations that have occurred/will occur in the past/future. There are some recommendation methods that provide information suitable for users' action patterns as the recommendation methods considering them. These methods provide information referring to the other users that have a similar action pattern to that of an active user. However, since a user's action pattern changes depending on the user's contexts, the methods need to refer to the other users' action patterns related to the current user's contexts. In this paper, we propose a recommendation method considering the user's time series contexts considering that the user's action pattern changes depending on the user's contexts. Copyright 2009 ACM.

关键词： Time series

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Spatial and temporal characterization of a Bessel beam produced using a conical mirror

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Physical Review A 2009年第4期79卷 043802-043802页

作者： K. B. Kuntz B. Braverman S. H. Youn M. Lobino E. M. Pessina A. I. Lvovsky Institute for Quantum Information Science University of Calgary Calgary Alberta Canada T2N 1N4 Centre for Quantum Computer Technology School of Information Technology and Electrical Engineering University College The University of New South Wales Canberra ACT 2600 Australia Department of Physics University of Toronto Toronto Ontario Canada M5S 1A7 Department of Physics Chonnam National University Gwangju 500-757 Korea Pirelli Labs Viale Sarca 336 20126 Milano Italy

We experimentally analyze a Bessel beam produced with a conical mirror, paying particular attention to its superluminal and diffraction-free properties. We spatially characterized the beam in the radial and on-axis dimensions and verified that the central peak does not spread over a propagation distance of 73 cm. In addition, we measured the superluminal phase and group velocities of the beam in free space. Both spatial and temporal measurements show good agreement with the theoretical predictions.

关键词： Laser beams

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Precise extraction of moving objects in video stream

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Kyokai Joho Imeji Zasshi/Journal of the Institute of Image information and Television Engineers 2009年第11期63卷 1574-1584页

作者： Tehrani, Mehrdad Panahpour Ishikawa, Akio Naito, Sei Sakazawa, Shigeyuki Koike, Atsushi Ultra Realistic Communications Laboratory KDDI RandD Laboratories Inc. 2-1-15 Ohara Fujimino Saitama 356-8502 Japan Department of Electrical Engineering and Computer Science Graduate School of Engineering Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Japan Department of Computer and Information Science Faculty of Science and Technology Seikei University 3-3-1 Kichijoji-Kitamachi Musashino-shi Tokyo 180-8633 Japan

We propose an automatic and precise moving-object extraction method for use in video streams that can also be used for 3-D system applications. The method generates a statistical model for each pixel using several frames, and then uses it to generate trimap images. After manually initializing a frame, unknown regions are automatically determined either background or foreground for the rest of frames. The key technology proposed is an adaptive training scheme, which estimates detection thresholds locally through the algorithm, followed by matting approaches using an iterative process and weighted statistical distance minimization. Experiments demonstrate outperformance of our method for both indoor and outdoor video streams, and also for 3-D modeling and representation.

关键词： Extraction

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Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at sNN=2.76 TeV with the ATLAS Detector at the LHC

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Physical Review Letters 2010年第25期105卷 252303-252303页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. S. Acharya M. Ackers D. L. Adams T. N. Addy J. Adelman M. Aderholz S. Adomeit P. Adragna T. Adye S. Aefsky J. A. Aguilar-Saavedra M. Aharrouche S. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. Akdogan T. P. A. Åkesson G. Akimoto A. V. Akimov M. S. Alam M. A. Alam S. Albrand M. Aleksa I. N. Aleksandrov M. Aleppo F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso J. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós N. Amram C. Anastopoulos T. Andeen C. F. Anders K. J. Anderson A. Andreazza V. Andrei M-L. Andrieux X. S. Anduaga A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli S. Antonelli J. Antos F. Anulli S. Aoun L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce J. P. Archambault S. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster K. E. Arms S. R. Armstrong O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov S. Asai J. Silva R. Asfandiyarov S. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert B. Auerbach E. Auge K. Augsten M. Aurousseau N. Austin R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes E. Badescu P. Bagnaia S. Bahinipati Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker S Baker F. Baltasar Dos Santos Pedrosa E. Banas P. Banerjee Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov A. Barashkou A. Barbaro Galtieri T. Barber E. L. Barberio D. Barberis M. Barbero D. Y. Bardin T. Barillari M. Barisonzi T. Barklow N. Barlow B. M. Barnett R. M. Barnett A. Baroncelli A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Albert-Ludwigs-Universität Fakultät für Mathematik und Physik Hermann-Herder Strasse 3 D-79104 Freiburg i.Br. Germany University of Oklahoma Homer L. Dodge Department of Physics and Astronomy 440 West Brooks Room 100 Norman Oklahoma 73019-0225 USA Institut de Física d’Altes Energies IFAE Edifici Cn Universitat Autònoma de Barcelona ES-08193 Bellaterra (Barcelona) Spain Université de Genève Section de Physique 24 rue Ernest Ansermet CH-1211 Geneve 4 Switzerland Oxford University Department of Physics Denys Wilkinson Building Keble Road Oxford OX1 3RH United Kingdom Institute of Physics Azerbaijan Academy of Sciences H. Javid Avenue 33 AZ 143 Baku Azerbaijan Oklahoma State University Department of Physics 145 Physical Sciences Building Stillwater Oklahoma 74078-3072 USA Michigan State University Department of Physics and Astronomy High Energy Physics Group East Lansing Michigan 48824-2320 USA Tel Aviv University Raymond and Beverly Sackler School of Physics and Astronomy Ramat Aviv IL - Tel Aviv 69978 Israel LAL Université Paris-Sud IN2P3/CNRS Orsay France INFN Sezione di Milano via Celoria 16 IT-20133 Milano Italy Università di Milano Dipartimento di Fisica via Celoria 16 IT-20133 Milano Italy INFN Gruppo Collegato di Udine Strada Costiera 11 IT-33100 Udine Italy ICTP Strada Costiera 11 IT-34014 Trieste Italy University of Bonn Physikalisches Institut Nussallee 12 D-53115 Bonn Germany Brookhaven National Laboratory Physics Department Building 510A Upton New York 11973 USA Hampton University Department of Physics Hampton Virginia 23668 USA Yale University Department of Physics P.O. Box 208121 New Haven Connecticut 06520-8121 USA Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) Föhringer Ring 6 80805 München Germany Ludwig-Maximilians-Universität München Fakultät für Physik Am Coulombwall 1 DE-85748 Garching Germany Queen Mary University of London Department of Physics Mile End Road London E1 4NS United Kingdom Ruther

By using the ATLAS detector, observations have been made of a centrality-dependent dijet asymmetry in the collisions of lead ions at the Large Hadron Collider. In a sample of lead-lead events with a per-nucleon center of mass energy of 2.76 TeV, selected with a minimum bias trigger, jets are reconstructed in fine-grained, longitudinally segmented electromagnetic and hadronic calorimeters. The transverse energies of dijets in opposite hemispheres are observed to become systematically more unbalanced with increasing event centrality leading to a large number of events which contain highly asymmetric dijets. This is the first observation of an enhancement of events with such large dijet asymmetries, not observed in proton-proton collisions, which may point to an interpretation in terms of strong jet energy loss in a hot, dense medium.

关键词： Energy dissipation

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Wireless and pervasive communications for healthcare: Guest editorial

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IEEE Journal on Selected Areas in Communications 2009年第4期27卷 361-364页

作者： Vasilakos, Athanasios Chen, Hsiao-Hwa Mouftah, Hussein Habib, Ibrahim Montgomery, Kevin Department of Computer and Telecommunications Engineering University of Western Macedonia 50100 Kozani Greece Department of Engineering Science National Cheng Kung University Tainan City 70101 Taiwan School of Information Technology and Engineering University of Ottawa Ottawa ON K1N 6N5 Canada Department of Electrical Engineering Graduate School City University of New York Convent Avenue at 140th Street New York NY 10031 United States National Biocomputation Center 701A Welch Road Stanford CA 94305 United States

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