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International Conference on Information Technology: New Generations (ITNG)

作者： Denis S. Loubach Diogo B. Ramos Osamu Saotome Adilson M. da Cunha Electronics & Computer Engineering Dept. Brazilian Aeronautical Institute of Technology S??o Paulo Brazil

This paper presents a comparison between C and C+ + source code automatically generated by CASE tools, and those hand made. In order to compare these two different kinds of implementation, some software static metrics were chosen, due to its soundness and confidence when applied to source code evaluation. A critical real time embedded software for a student satellite onboard computer was considered. Finally, this work points to some preliminary differences between those two implementations, related to software quality applied to an aerospace software prototype.

关键词： computer aided software engineering Software quality Satellites Software prototyping Application software Software testing Information technology Embedded software Embedded computing Real time systems

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Lecture Notes in Electrical engineering: Preface

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Lecture Notes in Electrical engineering 2008年 9 LNEE卷 vii-x页

作者： Buyya, Rajkumar Pathan, Mukaddim Vakali, Athena Dept. Computer Science and Software Engineering University of Melbourne 111 Barry Street Carlton VIC 3053 Australia Dept. Informatics Aristotle University of Thessaloniki 541 24 Thessaloniki Greece

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Synthesis of Ultra-Wideband (UWB) Bandpass Filter with High-Performance

Synthesis of Ultra-Wideband (UWB) Bandpass Filter with High-...

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China-Japan Joint Microwave Conference

作者： Chun-Ping Chen Naoki Nagaoka Zhewang Ma Tetsuo Anada Dept. of Electronics & Informatics Engineering & High-Tech Research Center Kanagawa University Yokohama Japan Graduate School of Science and Engineering Saitama University Saitama Japan

ISBN: (纸本)9781424438211

In this paper, a high-performance ultra-wideband bandpass (UWB) filter consisting of two short-circuited stubs combined with two-stage of stepped impedance resonators (SIRs) is proposed to meet FCC's specifications. The filter is first designed by newly-presented synthesis scheme, then optimized by EM simulator, fabricated in microstrip line and finally characterized by network analyzer. The experimental filters responses compare very well with the theoretical ones, which successfully validates our synthesis techniques. In addition, the designed filter exhibits good characteristics of low insertion loss, quite sharp skirts, flat group delay, deep attenuations in stopband (especially in lower one) and well-satisfies even FCC outdoor specifications. It should be note that the proposed filter prototype can be also used to realize a UWB filter with an FBW even greater than 110%.

关键词： Ultra wideband technology Band pass filters Resonator filters Network synthesis Impedance Design optimization Analytical models Microstrip filters Insertion loss Delay

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Search for Diphoton Events with Large Missing Transverse Energy in 7 TeV Proton-Proton Collisions with the ATLAS Detector

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Physical Review Letters 2011年第12期106卷 121803-121803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 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. Battist Albert-Ludwigs-Universität Fakultät für Mathematik und Physik Hermann-Herder Str. 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 Milano Italy Università di Milano Dipartimento di Fisica via Celoria 16 IT - 20133 Milano Italy INFN Gruppo Collegato di Udine 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 PO 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 Rutherford Appleton Laboratory Science and Technolo

A search for diphoton events with large missing transverse energy is presented. The data were collected with the ATLAS detector in proton-proton collisions at s=7 TeV at the CERN Large Hadron Collider and correspond to an integrated luminosity of 3.1 pb−1. No excess of such events is observed above the standard model background prediction. In the context of a specific model with one universal extra dimension with compactification radius R and gravity-induced decays, values of 1/R<729 GeV are excluded at 95% C. L., providing the most sensitive limit on this model to date.

关键词： Tellurium compounds

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S+C+L broadband source based on semiconductor optical amplifiers and erbium-doped fiber for optical coherence tomography

S+C+L broadband source based on semiconductor optical amplif...

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Photonics North 2007

作者： Carrion, L. Beitel, D. Lee, K.L. Jain, A. Chen, L.R. Maciejko, R. Nirmalathas, A. Laboratoire d'Optoélectronique Département de Génie Physique Ecole Polytechnique de Montréal Montréal QC H3C3A7 Canada Dept. of Electrical and Computer Engineering McGill University Montréal QC H3A2A7 Canada Dept. of Electrical and Electronics Engineering University of Melbourne Parkville VIC 3010 Australia

ISBN: (纸本)9780819469625

Broadband sources (BBSs) are commonly used in a wide range of applications in optical communication systems and biophotonics. They are particularly useful tools for Optical Coherence Tomography (OCT), which is a biomedical imaging technique that uses low-coherence light sources. In order to obtain high image quality, we have developed a novel, spectrally-flat S+C+L band source with > 120 nm bandwidth and more than 4 mW output power based on two cascaded semiconductor optical amplifiers (SOA) mixed with an Erbium-doped fiber (EDF) amplifier. Bandwidth and output power improvements are achieved by modifying the former configuration and mixing the EDF with the first SOA before amplification in the second SOA. This configuration results in bandwidth and output power enhancements of up to 146 nm and 8 mW, respectively. The source was then tested in an OCT system. It gives a 10 μm FWHM, low sidelobe OCT autocorrelation trace. Images and OCT autocorrelation traces were compared for the two aforementioned (which two;you mentioned one?) configurations. Images of miscellaneous samples made with the BBS show an image aspect and sharpness that is comparable with more expensive sources such as Ti: Sapphire lasers.

关键词： Semiconductor optical amplifiers

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A 2.4-GHz front-end system design for WLAN applications using 0.35m SiGe BiCMOS technology

A 2.4-GHz front-end system design for WLAN applications usin...

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2008 3rd International Conference on Information and Communication Technologies: From Theory to Applications, ICTTA

作者： Eshghabadi, Farshad Dousti, Masoud Temcamani, F. Delacressoniere, B. Gautier, J.L. Arak Branch Arak Iran Dept. of Computer and Electronics Engineering Power and Water University of Technology Tehran Iran Science and Research Campus Tehran Iran ENSEA ECIME Research Group Cergy-Pontoise Cedex France

ISBN: (纸本)1424417511

A 2.4GHz front-end system design for wide spectrum WLAN applications is presented in a 0.35m SiGe BiCMOS Technology. This transceiver front-end contains a receive (Rx) chain with a two-stage cascode low noise amplifier (LNA) and an active down-conversion Rx mixer, and a transmit (Tx) chain composed of a Gilbert-Cell core up-conversion Tx mixer and a high-gain Driver Amplifier (DA). The high linear LNA shows a gain of 15.5 dB, an noise figure (NF) of 2.28 dB and an inputreferred third-order intercept point (1P3) of+2.4 dBm with 1-dB gain bandwidth (BW) of 1.5 GHz. The single-balanced Rx mixer exhibited a gain and 1-dB gain BW of+6.8 dB and 1.5 GHz. Also a double-balanced Tx mixer with a gain and input/output return loss of -1.3dB and below -35dB, respectively, and a DA with a gain and output-referred IP3 of +29.2dB and +21.2dBm, respectively, is developed. The NF, input-referred IP3 and DC power consumption of Rx string (from antenna to Rx mixer) were achieved 4.4 dB, -15.4 dBm and 30mW respectively. The output-referred IP3 and power consumption of Tx chain were +20.5 dBm and 125mW, respectively.

关键词： Low noise amplifiers

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Activity-based Security Scheme for Ubiquitous Environments

Activity-based Security Scheme for Ubiquitous Environments

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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： Le Xuan Hung J Hassan A. S Riaz S.M.K. Raazi Y. Weiwei NT Canh P.T.H. Truc Sungyoung Lee Heejo Lee Yuseung Son Miguel Fernandes Miso Kim Yonil Zhung Dept. of Computer Engineering Kyung Hee University Korea Dept. of Computer Science and Engineering Korea University Korea Dept.of Information Assurance Institute for Graphic Interfaces Korea R&D Center at Samsung Electronics South Korea

Bardram introduced a new concept of activity-based computing as a way of thinking about supporting human activities in ubiquitous environments. In such environments where users are using a multitude of heterogeneous computing devices, the need for supporting users at the activity level becomes essential. However, without considering basic security issues, it could be rife with vulnerabilities. Security services, like authentication and access control, have to not only guarantee security, privacy, and confidentiality for ubiquitous computing resources, but also support user activities equipped with various devices. In this paper, we present an activity-based security scheme. The proposed scheme aims to enhance security services on mobile devices and facilitate user activities. We also integrate off-the-shell security services like MD5, TEA, Diffie-Hellman key agreement protocol so that it makes the scheme more robust and practically usable. The implementation and sample scenario have shown the requirement satisfactory of the scheme.

关键词： Security Pervasive computing Access control Authentication Humans Access protocols Ubiquitous computing computer interfaces Privacy Robustness

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Cluster Management in a Virtualized Server Environment

Cluster Management in a Virtualized Server Environment

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International Conference on Advanced Communication Technology (ICACT)

作者： Jong-Geun Park Jin-Mee Kim Chang-Won Ahn Young-Choon Woo Hoon Choi Internet Server Technology Group Electronics & Telecommunications Research Institute South Korea Department of Computer Engineering Chungnam National University South Korea Dept. of Computer Engineering Chung-Nam National University

One of the most attractive topics of today is server visualization. Sever virtualization is not a new concept. However technologies and market demand are increasing the use of server virtualization amazingly. In this paper, we consider cluster management in virtualized environment to implement the virtualizing up and down model. Thus we identify some design considerations for constructing and managing cluster. And then we show architecture to support clustering of virtual nodes based on the DMTF standards.

关键词： Environmental management Platform virtualization Resource virtualization Application software Operating systems Web server Scalability Availability Application virtualization Virtual machining

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Joint frequency and 2-D angle estimation based on vector sensor array with sub-Nyquist temporal sampling

Joint frequency and 2-D angle estimation based on vector sen...

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European Signal Processing Conference (EUSIPCO)

作者： Fei Ji Carrson C. Fung Sam Kwong Chi-Wah Kok School of Electronic and Information Engineering South China University of Technology Guangdong China Dept. of Electronics Engineering National Chiao Tung University Hsinchu Taiwan Dept. of Computer Science City University of Hong Kong Hong Kong Dept. of Electronic Engineering City University of Hong Kong Hong Kong

ISBN: (纸本)9782839904506

A novel ESPRIT based algorithm is proposed to jointly estimate 2-dimensional direction-of-arrivals (2-D DOAs) and frequencies of the incoming superimposed complex sinusoidal signals using a sparse uniform linear array of electromagnetic vector-sensors. The proposed method is based on a matrix pencil pair of temporally displaced data sets that are collected from the electromagnetic vector sensor array, where the DOA and frequency estimates can be estimated unambiguously from the eigenvectors and eigenvalues of the matrix pencil even when the interelement spacing is more than half wavelength. A second algorithm is proposed to resolve the ambiguity problem in the frequency estimates when the temporal sampling rate is less than half of the Nyquist rate of the signal, i.e. the sampling rate is less than the maximum frequency of the signal. Simulation results support the proposed algorithms and show that the 2-D DOA and frequency estimates are asymptotically unbiased and have a low variance.

关键词： Frequency estimation Signal to noise ratio Standards Arrays Direction-of-arrival estimation Vectors Electromagnetics

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Measurement of underlying event characteristics using charged particles in pp collisions at s=900 GeV and 7 TeV with the ATLAS detector

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Physical Review D 2011年第11期83卷 112001-112001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 H. Ahmed 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 B. Antunovic F. Anulli S. Aoun R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce J. P. Archambault S. Arfaoui J-F. Arguin T. Argyropoulos E. Arik M. Arik A. J. Armbruster K. E. Arms S. R. Armstrong O. Arnaez C. Arnault A. Artamonov D. Arutinov S. Asai 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 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. Battistin 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 du Paris-Sud IN2P3/CNRS Orsay France INFN Sezione di Milano Italy Università di Milano Dipartimento di Fisica via Celoria 16 IT - 20133 Milano Italy INFN Gruppo Collegato di 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 Rutherford Appleton Laboratory Science and Technology Facili

Measurements of charged particle distributions, sensitive to the underlying event, have been performed with the ATLAS detector at the LHC. The measurements are based on data collected using a minimum-bias trigger to select proton-proton collisions at center-of-mass energies of 900 GeV and 7 TeV. The “underlying event” is defined as those aspects of a hadronic interaction attributed not to the hard scattering process, but rather to the accompanying interactions of the rest of the proton. Three regions are defined in azimuthal angle with respect to the highest transverse momentum charged particle in the event, such that the region transverse to the dominant momentum-flow is most sensitive to the underlying event. In each of these regions, distributions of the charged particle multiplicity, transverse momentum density, and average pT are measured. The data show generally higher underlying event activity than that predicted by Monte Carlo models tuned to pre-LHC data.

关键词： PROTON-proton interactions NUCLEAR reactions DETECTORS SCATTERING (Physics) HADRONS

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