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Guest Editorial price-based access control and economics of networking

IEEE Journal on Selected Areas in Communications 2006年第5期24卷 937-938页

作者： Mazumdar, Ravi R. Courcoubetis, Costas A. Duffield, Nick Kesidis, George Odlyzko, Andrew Srikant, R. Walrand, Jean University of Waterloo Department of Electrical and Computer Engineering Waterloo Ont. N2L 3G1 Canada Athens University of Economics and Business Department of Informatics Athens 10434 Greece AT and T Laboratories Florham Park NJ 07932-0971 United States Pennsylvania State University Department of Electrical and Computer Engineering University Park PA 16802 United States University of Minnesota Digital Technology Center Minneapolis MN 55455 United States University of Illinois at Urbana-Champaign Coordinated Science Laboratory Urbana IL 61801 United States University of California at Berkeley Department of Electrical Engineering and Computer Sciences Berkeley CA 94720 United States Department of Electrical and Computer Engineering University of Waterloo Waterloo Ont. Canada Department of Electrical and Computer Engineering Purdue University West Lafayette IN United States Royal Statistical Society Canada Canada Canada Canada Network Economics and Services Group Theory Economics and Systems Laboratory Athens University of Economics and Business Athens Greece Network Management and Performance Department AT and T Laboratories-Research Florham Park NJ United States Electrical Engineering and Computer Science and Engineering Departments Pennsylvania State University University Park United States Digital Technology Center United States University of Minnesota Minneapolis United States University of Illinois Urbana-Champaign United States Department of Electrical and Computer Engineering Canada Coordinated Science Laboratory United States Department of Electrical Engineering and Computer Sciences University of California at Berkeley Berkeley United States Belgian American Education Foundation United States

No abstract available

关键词： Access control Pricing Web and internet services IP networks Optimal control Quality of service Impedance History Internet telephony Convergence

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System-identification noise suppression for intra-partum cardiotocography to discriminate normal and hypoxic fetuses

System-identification noise suppression for intra-partum car...

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2006 computers in Cardiology, CIC

作者： Warrick, Philip A. Kearney, R.E. Precup, D. Hamilton, E.F. Biomedical Engineering Department McGill University Montreal QC Canada School of Computer Science McGill University Montreal QC Canada Department of Obstetrics and Gynecology McGill University Montreal QC Canada LMS Medical Systems Inc. Montreal QC Canada Department of Biomedical Engineering McGill University 3775 rue University Montreal QC H3A 2B4 Canada

ISBN: (纸本)1424425328

We construct linear system-identification models of cardiotocography (CTG) data collected during labour and delivery. The models are the impulse response functions (IRFs) of the input-output system relating the uterine pressure (UP) stimulus to the fetal heart rate (FHR) response. We compare models obtained with and without applying noise suppression via the pseudo inverse technique. Finally, to determine the ability of the models to discriminate healthy from hypoxic fetuses, we use the average models as feature vectors of a support-vector-machine (SVM) classifier. Applying the pseudo-inverse resulted in cleaner models with lower variance accounted for (VAF), likely indicative of reduced overfitting. The area under curve of the receiver-operator characteristic (ROC) without applying pseudo-inverse was 0.695 ± 0.054. Similar results over a useful operating range of false-positive rates were observed with the pseudo-inverse applied.

关键词： Support vector machines

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Semantic search in tabular structures

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Informatica (Ljubljana) 2006年第2期30卷 143-152页

作者： Pivk, Aleksander Gams, Matjaž Luštrek, Mitja Department of Intelligent Systems Jozef Stefan Institute Jamova 39 SI-1000 Ljubljana Slovenia Department of Computer Science University of Alberta Edmonton Alta. T6G 2E8 Canada

The Semantic Web search aims to overcome the bottleneck of finding relevant information using formal knowledge models, e.g. ontologies. The focus of this paper is to extend a typical search engine with semantic search over tabular structures. We categorize HTML documents into topics and genres. Using the TARTAR system, tabular structures in the documents are then automatically transformed into ontologies and annotated to build a knowledge base. When posting queries, users receive responses not just as lists of links and description extracts, but also enhanced with replies in the form of detailed structured data.

关键词： Search engines

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Handover Latency Reduction on Host-based Mobility in Multihomed Networks

Handover Latency Reduction on Host-based Mobility in Multiho...

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IEEE Conference on Vehicular Technology (VTC)

作者： H. Koga K. Iida H. Haraguchi Y. Oie Kitakyushu JGN2 Research Center National Institute of Information and Communications Technology Japan Yaskawa Information Systems Corporation Japan Department of Computer Science and Electronics Kyushu Institute of Technology Japan

Future pervasive networks will be constructed by various access networks, which will be managed by different operators. Host-based mobility mechanisms are promising for achieving efficient mobile computing in such an environment, because of their ability to handle the multihomed environment. However, the impact of switching network media will significantly degrade performance of communications with large RTT and high moving intensity. Therefore, we propose an adaptive handover scheme on host-based mobility to mitigate the impact of the switching media under such circumstances. This scheme switches the way of handover according to the network conditions. Furthermore, we demonstrate the effectiveness of the proposed scheme through simulation results

关键词： Intelligent networks Communication switching Degradation Switches Mobile computing Mobile communication Computational modeling Delay effects Communications technology Electronic mail

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Misuse and abuse of interactive technologies

Misuse and abuse of interactive technologies

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Conference on Human Factors in Computing systems, CHI EA 2006

作者： De Angeli, Antonella Brahnam, Sheryl Wallis, Peter Dix, Alan School of Informatics University of Manchester PO Box 88 Manchester M60 1QD United Kingdom Computer Information Systems Missouri State University 901 S. National Street Springfield MO 65804 United States NPL Group Department of Computer Science University of Sheffield Western Bank Sheffield S10 2TN United Kingdom Computing Department InfoLab21 Lancaster University Bailrigg Lancaster LA1 4YW United Kingdom

ISBN: (纸本)1595932984

The goal of this workshop is to address the darker side of HCI by examining how computers sometimes bring about the expression of negative emotions. In particular, we are interested in the phenomenon of human beings abusing computers. Such behavior can take many forms, ranging from the verbal abuse of conversational agents to physical attacks on the hardware. In some cases, particularly in the case of embodied conversational agents, there are questions about how the machine should respond to verbal assaults. This workshop is also interested in understanding the psychological underpinnings of negative behavior involving computers. In this regard, we are interested in exploring how HCI factors influence human-to-human abuse in computer-mediated communication. The overarching objective of this workshop is to sketch a research agenda on the topic of the misuse and abuse of interactive technologies that will lead to design solutions capable of protecting users and restraining disinhibited behaviors.

关键词： Human computer interaction

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Multiple autonomous aerobots performing formation flying and cooperative behaviour

Multiple autonomous aerobots performing formation flying and...

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DASIA 2006: DAta systems In Aerospace

作者： Honary, Ehsan McQuade, Frank Ward, Roger Woodrow, Ian Shaw, Andy Barnes, Dave Fyfe, Matthew SciSys Clothier Road Bristol BS4 5SS United Kingdom SEA Systems Engineering and Assessment Ltd. Beckington Castle Castle Corner Beckington Frome BA11 6TB United Kingdom University of Wales Aberystwyth Computer Science Department Aberystwyth Ceredigion SY23 3DB United Kingdom SCS Systems Consultants Services Limited Oxfordshire RG9 2JN United Kingdom

ISBN: (纸本)9290929413

Use of multiple autonomous robots for practical applications has become more important over the years [1][2][3][4]. The potential for applications of collective robotics is high, in particular in the aerospace environment. SciSys has been involved in the development of Planetary Aerobots (funded by ESA) for use on Mars and has developed image-based localisation technology as part of the activity. It is however possible to use the Aerobots in a different environment to investigate issues in regard with robotics behaviour such as data handling, communications, limited processing power, limited sensors, GNC, etc. This paper summarises the activity where Aerobot platform was used to investigate the use of multiple autonomous Unmanned Underwater Vehicles (UUVs), basically simulating their movement and behaviour. The main purpose of the Multiple UUV Operations (MuOps) project within the BAUUV1 program was to identify and de-risk critical UUV components and raise the technology readiness level of the components required for the operation of multiple cooperative vehicles. This paper reports the computer simulations and the real-world tests and the lessons learnt from them.

关键词： Robotics

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FROM STRUCTURAL TO FUNCTIONAL MODELS OF COMPLEX systems

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IFAC Proceedings Volumes 2006年第13期39卷 1276-1281页

作者： Marta Capiluppi Marcel Staroswiecki Center for Research on Complex Automated Systems (CASY) “Giuseppe Evangelisti” DEIS Department of Electronic Computer Science and Systems University of Bologna Viale Risorgimento 2 40136 Bologna Italy SATIE UMR CNRS 8029 Ecole Normale Superieure de Cachan 61 avenue du Président Wilson F-94235 Cachan cedex France

This paper addresses functional modelling of complex distributed systems via an objective and automatic procedure. The presented methodology uses the structural representation of the system and the notion of causality in structural graphs. The result of the procedure is a functional tree representing hierarchical relations among the system functionalities.

关键词： Fault tolerance Structural properties Tree structures Complex systems System models

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A simd environment for genetic algorithms with interconnected subpopulations

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Scalable Computing 2006年第2期7卷 65-86页

作者： Prabhu, Devaraya Buckles, Bill P. Petry, Frederick E. I2 Technologies 1603 LBJ Freeway Suite 780 DallasTX75234 United States The Center for Intelligent and Knowledge-based Systems Department of Electrical Engineering and Computer Science Tulane University New OrleansLA70118 United States

The algorithmic form of GAs conforms well to SIMD computing environments with relatively minor adjustments to the operators. In this paper we consider in detail a GA implementation on a MasPar machine. The question of the degree to which control parameters affecting intercommunication impact performance is addressed using ANOVA methods. The purpose is to supplant anecdotal experience with statistical evidence. A set of control parameters-topology, migration operator, migration radius, and migration probability-were chosen together with four representative levels of each. Metrics for three response variables-efficiency, diversity, and schema propagation-were developed that allowed insight into the behavior under the various parametric conditions. These were incorporated into three 4 × 4 × 4 × 4 randomized factorial experiment designs. Among other things, it was determined that the interconnection topology is not in itself a significant factor but the extent of connectivity and frequency of communication are. An important outcome of this study is that, while the individual factors are significant, the factors do not interact in unexpected ways. © 2006 SWPS.

关键词： Genetic algorithms

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Observation of discrete nonlinear X-waves

Observation of discrete nonlinear X-waves

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Photonic Metamaterials: From Random to Periodic, META 2006

作者： Lahini, Yoav Frumker, Eugene Silberberg, Yaron Droulias, Sotiris Hizanidis, Kyriakos Morandotti, Roberto Christodoulides, Demetrios N. Department of Physics of Complex Systems The Weizmann Institute of Science Rehovot 76100 Israel National Technical University of Athens School of Electrical and Computer Engineering 9 Iroon Polytechniou str Athens 15773 Greece Institute National de la Recherche Scientifique Varennes QC J3X 1S2 Canada College of Optics and Photonics CREOL University of Central Florida 4000 Central Florida Blvd. Orlando FL 32816 United States

We present experimental evidence for the formation of nonlinear X-waves in AlGaAs waveguide arrays. These results agree with numerical simulations based on the discrete nonlinear Schrödinger equation with an appr... 详细信息

ISBN: (纸本)155752808X

关键词： Nonlinear equations

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Discrete nonlinear X-waves in waveguide arrays

Discrete nonlinear X-waves in waveguide arrays

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Quantum Electronics and Laser science Conference, QELS 2006

作者： Lahini, Yoav Frumker, Eugene Silberberg, Yaron Droulias, Sotiris Hizanidis, Kyriakos Morandotti, Roberto Christodoulides, Demetrios N. Department of Physics of Complex Systems Weizmann Institute of Science Rehovot 76100 Israel National Technical University of Athens School of Electrical and Computer Engineering 9 Iroon Polytechniou str Athens 15773 Greece Institute National de la Recherche Scientifique Varennes QC J3X 1S2 Canada College of Optics and Photonics CREOL University of Central Florida 4000 Central Florida Blvd. Orlando FL 32816 United States

ISBN: (纸本)1557528136

关键词： Nonlinear equations

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