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IEEE Globecom Workshops

作者： E. Onur E. Sfakianakis C. Papagianni G. Karagiannis T. Kontos I. Niemegeers I. P. Chochliouros S. Heemstra de Groot P. Sjodin M. Hidell T. Cinkler M. Maliosz D. I. Kaklamani J. Carapinha M. Belesioti E. Fytros Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technnology Netherlands Laboratories & New Technologies Division Research Programs Section Hellenic Telecommunications Organization S. A. Athens Greece School of Electrical and Computer Engineering National and Technical University of Athens Greece Department of Electrical Engineering Mathematics and Computer Science and CTIT University of Twente Enschede Netherlands Siemens IT Solutions and Services Athens Greece Twente Institute for Wireless and Mobile Communications Enschede Netherlands School of Information and Communication Technology Royal Institute of Technology Stockholm Sweden Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Hungary Portugal Telecom Group PT Inovação S A Portugal

Service-oriented architecture can be considered as a philosophy or paradigm in organizing and utilizing services and capabilities that may be under the control of different ownership domains. Virtualization provides abstraction and isolation of lower level functionalities, enabling portability of higher level functions and sharing of physical resources. However, dynamics, environmental conditions and increasing complexity / heterogeneity of underlying resources call for adaptive resource handling. In this view an intelligent distributed architecture that enables dynamic user management and control on network-wide resource sharing by using the service oriented architecture concept is presented. Additionally, the proposed architecture supports trading of resources that will enable the transformation of traditional business models.

关键词： Resource virtualization Service oriented architecture Resource management computer networks Grid computing Cloud computing Mathematics computer science Organizing Hardware

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Performance Analysis of OLSR and BATMAN Protocols Considering Link Quality Parameter

Performance Analysis of OLSR and BATMAN Protocols Considerin...

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International Conference on Advanced Information Networking and Applications (AINA)

作者： Leonard Barolli Makoto Ikeda Giuseppe De Marco Arjan Durresi Fatos Xhafa Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) Higashi-Ku Fukuoka Japan Graduate School of Engineering FIT Higashi-Ku Fukuoka Japan Toyota Kogyo Daigaku Nagoya Aichi JP Department of Computer and Information Science Indiana University Purdue University at Indianapolis (IUPUI) Indianapolis IN USA Department of Languages and Informatics Systems Polytechnic University of Catalonia Barcelona Spain

ISBN: (纸本)9781424440009

In this paper, we present the implementation and analysis of our testbed considering the link quality window size (LQWS) parameter of optimized link state routing (OLSR) and better approach to mobile ad-hoc networking (B.A.T.M.A.N.) protocols. We investigate the effect of mobility in the throughput of a mobile ad-hoc network (MANET). The mobile nodes move toward the destination at a regular speed. When the mobile nodes arrive at the corner, they stop for about three seconds. In our experiments, we consider two cases: only one node is moving (mobile node)and two nodes (intermediate nodes) are moving at the same time. We assess the performance of our testbed in terms of throughput, round trip time, jitter and packet loss. From our experiments, we found that throughput of TCP was improved by reducing LQWS.

关键词： Performance analysis Routing protocols Throughput Mobile ad hoc networks System testing Ad hoc networks Performance loss computer networks Information science USA Councils

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Meeting Report from the Second "Minimum Information for Biological and Biomedical Investigations" (MIBBI) workshop

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Standards in genomic sciences 2010年第3期3卷 259-66页

作者： Carsten Kettner Dawn Field Susanna-Assunta Sansone Chris Taylor Jan Aerts Nigel Binns Andrew Blake Cedrik M Britten Ario de Marco Jennifer Fostel Pascale Gaudet Alejandra González-Beltrán Nigel Hardy Jan Hellemans Henning Hermjakob Nick Juty Jim Leebens-Mack Eamonn Maguire Steffen Neumann Sandra Orchard Helen Parkinson William Piel Shoba ranganathan Philippe Rocca-Serra Annapaola Santarsiero David Shotton Peter Sterk Andreas Untergasser Patricia L Whetzel Beilstein-Institut Frankfurt am Main Germany Centre for Ecology & Hydrology UK Oxford e-Research Centre University of Oxford UK The European Bioinformatics Institute (EBI) UK Faculty of Engineering - ESAT/SCD Leuven University Leuven-Heverlee Belgium Division of Pathway Medicine University of Edinburgh Medical School Edinburgh UK MRC Harwell UK Medical Department University Medical Center Johannes Gutenberg University-Mainz Mainz Germany Consortium for Genomic Technology Milano Italy University of Nova Gorica Nova Gorica Slovenia NIEHS NIH US National Toxicology Program USA Swiss Institute of Bioinformatics Geneva Switzerland Computational and Systems Medicine and Department of Computer Science University College London London UK Department of Computer Science Aberystwyth University Aberystwyth UK Center for Medical Genetics Ghent University Ghent Belgium Department of Plant Biology University of Georgia Athens USA Department of Stress- and Developmental Biology Institute for Plant Biochemistry Halle Germany Peabody Museum of Natural History Yale University New Haven USA Macquarie University Sydney Australia National University of Singapore Singapore Cancer Pharmacology The Mario Negri Institute for Pharmacological Research Milan Italy Image Bioinformatics Research Group Department of Zoology University of Oxford Oxford UK Wellcome Trust Sanger Institute UK Zentrum für Molekulare Biologie der Universität Heidelberg Heidelberg Germany The National Center for Biomedical Ontology / Stanford Center for Biomedical Informatics Research Stanford University Stanford USA

This report summarizes the proceedings of the second workshop of the 'Minimum Information for Biological and Biomedical Investigations' (MIBBI) consortium held on Dec 1-2, 2010 in Rüdesheim, Germany through the sponsorship of the Beilstein-institute. MIBBI is an umbrella organization uniting communities developing Minimum Information (MI) checklists to standardize the description of data sets, the workflows by which they were generated and the scientific context for the work. This workshop brought together representatives of more than twenty communities to present the status of their MI checklists and plans for future development. Shared challenges and solutions were identified and the role of MIBBI in MI checklist development was discussed. The meeting featured some thirty presentations, wide-ranging discussions and breakout groups. The top outcomes of the two-day workshop as defined by the participants were: 1) the chance to share best practices and to identify areas of synergy; 2) defining a series of tasks for updating the MIBBI Portal; 3) reemphasizing the need to maintain independent MI checklists for various communities while leveraging common terms and workflow elements contained in multiple checklists; and 4) revision of the concept of the MIBBI Foundry to focus on the creation of a core set of MIBBI modules intended for reuse by individual MI checklist projects while maintaining the integrity of each MI project. Further information about MIBBI and its range of activities can be found at http://***/.

关键词： Minimum Information European Bioinformatics institute Biomedical Ontology Stable Link Breakout Group

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Real-time quantification of resting tremor in the Parkinson's disease

Real-time quantification of resting tremor in the Parkinson'...

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

作者： George Rigas Alexandros T. Tzallas Dimitrios G. Tsalikakis Spiros Konitsiotis Dimitrios I. Fotiadis Department of Computer Science University of Ioannina (UoI) Ioannina Greece Unit of Medical Technology and Intelligent Information Systems Department of Material Science and Engineering University of Ioannina (UoI) Ioannina Greece Department of Engineering Informatics and Telecommunications University of Western Macedonia Koza-gun Greece Department of Neurology Medical School University of Ioannina (UoI) Ioannina Greece FORTH Biomedical Research Institute Ioannina Greece

Resting tremor (RT) is one of the most frequent signs of the Parkinson's disease (PD), occurring with various severities in about 75% of the patients. Current diagnosis is based on subjective clinical assessment, which is not always easy to capture subtle, mild and intermittent tremors. The aim of the present study is to assess the suitability and clinical value of a computer based real-time system as an aid to diagnosis of PD, in particular the presence of RT. Five healthy subjects were asked to simulate several severities of RT in hands and feet in three static activities. The behaviour of the subjects is measured using tri-axial accelerometers, which are placed at four different positions on the body. Frequency-domain features, strongly correlated with the RT activity, are extracted from the accelerometer data. The classification of RT severity based on those features, provided accuracy 76%. The real-time system designed for efficient extraction of those features and the provision of a continuous RT severity measure is described.

关键词： Parkinson's disease Materials science and technology Biomedical engineering Intelligent systems Information systems Frequency Electromyography Real time systems Accelerometers Data mining

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Fixed point transformations in the adaptive control of fractional-order MIMO systems

Lecture Notes in Control and Information Sciences

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Lecture Notes in Control and Information Sciences 2009年 396卷 103-112页

作者： Tar, József K. Rudas, Imre J. Nádai, László Kozlowski, Krzysztof R. MacHado, José A. Tenreiro Institute of Intelligent Engineering Systems John von Neumann Faculty of Informatics Budapest Tech Bécsi út 96/B Budapest H-1034 Hungary Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 Budapest H-1111 Hungary Chair of Control and Systems Engineering Poznań University of Technology ul. Piotrowo 3a Poznań 60-965 Poland Department of Electrotechnical Engineering Institute of Engineering of Porto Rua Dr. Antonio Bernardino de Almeida Porto 4200-072 Portugal

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EOrBAC Based Network Security Management Toolkit

EOrBAC Based Network Security Management Toolkit

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IFIP International Conference on Wireless and Optical Communications Networks (WOCN)

作者： Ahmad A. Hassan Waleed M. Bahgat Abdel Fatah Ibrahim Department of Computer Science and Informatics Taibah University Saudi Arabia Department of Communications Misr Engineering and Technology Institute Al Mansoura Egypt Communications and Electronics Engineering Department Mansoura University Al Mansoura Egypt

Because of the growing complexity of networks and the difficult task of security policy enforcement, system administrators need simple and powerful security management tools. This paper presents a network security management tool that allows policy specification and administration of network security components such as firewall. The tool consists of four main modules. First module is considered the network repository of our toolkit. Through the second module the security policy is introduced and the necessary validation and verification is done by a policy engine. The third module is responsible for the translation of the high level security policy into an intermediate model level. Finally, the intermediate level is translated automatically into a vendor-specific security mechanism through the vendor specific compiler.

关键词： component Network security Security modeling Security policy Security mangement OrBAC model

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Web service workflow selection using system and network QoS constraints

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International Journal of Web engineering and technology 2008年第1期4卷 114-134页

作者： Panagis, Yannis Papakonstantinou, Konstantinos Sakkopoulos, Evangelos Tsakalidis, Athanasios Department of Computer Engineering and Informatics University of Patras Campus 26504 Patras Greece Research Academic Computer Technology Institute N. Kazantzaki str. Campus 26504 Patras Greece Technology Education and Digital Systems Department University of Piraeus Exodus S.A. Department of Computer Engineering and Informatics University of Patras

Web services serve as a leading technology platform for web-based data-centric environments providing flexibility of loose coupling, message-based communication. Interest in more efficient web services selection strategies is rather requisite especially from the business process workflow perspective. We present several strategies to efficiently select a set of web services performing a workflow, fulfilling quality specifications at all workflow steps. The focus is on finding the best performing web service given a history of the execution times and current measured variation in operating system and network resource consumption. To assess their efficiency, we experimentally evaluate them and present comparative results, which strongly indicate that they can effectively reduce the overall workflow execution time in a web service-based workflow with QoS constraints. Approaches are presented for a number of workflows depending on their particular characteristics. Copyright © 2008 Inderscience Enterprises Ltd.

关键词： Web services

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A graph-theoretic network security game

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International Journal of Autonomous and Adaptive Communications Systems 2008年第4期1卷 390-410页

作者： Mavronicolas, Marios Papadopoulou, Vicky G. Philippou, Anna Spirakis, Paul G. Department of Computer Science University of Cyprus Nicosia CY-1678 Cyprus Department of Computer Engineering and Informatics University of Patras Rion Patras 26500 Greece Research Academic Computer Technology Institute Rion Patras 26500 Greece

Consider a network vulnerable to viral infection, where the security software can guarantee safety only to a limited part of it. We model this practical network scenario as a non-cooperative multi-player game on a graph, with two kinds of players, a set of attackers and a protector player, representing the viruses and the system security software, respectively. We are interested in the associated Nash equilibria, where no network entity can unilaterally improve its local objective. We obtain the following results: For certain families of graphs, mixed Nash equilibria can be computed in polynomially time. These families include, among others, regular graphs, graphs with perfect matchings and trees. The corresponding price of anarchy for any mixed Nash equilibria of the game is upper and lower bounded by a linear function of the number of vertices of the graph. (We define the price of anarchy to reflect the utility of the protector). Finally, we introduce a generalised version of the game. We show that the existence problem of pure Nash equilibria here is NP-complete. Copyright © 2008 Inderscience Enterprises Ltd.

关键词： Network security

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Emulating lossless, one-way signaling protocols in OBS networks with traffic prediction

Emulating lossless, one-way signaling protocols in OBS netwo...

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ONDM 2008 - 12th Conference on Optical Network Design and Modelling

作者： Monoyios, Demetris Vlachos, Kyriakos Computer Engineering and Informatics Department Research Academic Computer Technology Institute University of Patras Rio Greece

ISBN: (纸本)9783901882272

In this paper, we propose a new scheme for on demand reservation of capacity in OBS networks, emulating one-way signaling protocols. The proposed framework relies on the combination of a two-way reservation protocol and a burst assembly scheme with a burstification delay enforced to be the round-trip-time and which incorporates a Least Mean Square filter to predict burst length. Upon the arrival of the first packet in the burst queue, a control packet (setup message) is generated and transmitted to reserve resources, based on the prediction filter. In this way the reservation process starts/ends simultaneously with the burst assembly process. In this paper, we present the main features of the proposed scheme, evaluate its performance for both homogeneous and non-homogeneous traffic and we further propose an extension with aggressive overprovisioning of resources that can guarantee lossless operation even for extremely cases of bursty traffic.

关键词： Optical burst switching

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Probabilistic protocols for fair communication in wireless sensor networks

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4th International Workshop on Algorithmic Aspects of Wireless Sensor Networks, ALGOSENSORS 2008

作者： Chatzigiannakis, Ioannis Kirousis, Lefteris Stratiotis, Thodoris Research Academic Computer Technology Institute Patras Greece Department of Computer Engineering and Informatics University of Patras Greece

ISBN: (纸本)3540928618

In this work we present three new distributed, probabilistic data propagation protocols for Wireless Sensor Networks which aim at maximizing the network's operational life and improve its performance. The keystone of these protocols' design is fairness which declares that fair portions of network's work load should be assigned to each node, depending on their role in the system. All the three protocols, EFPFR, MPFR and TWIST, emerged from the study of the rigorously analyzed protocol PFR. Its design elements were identified and improvements were suggested and incorporated into the introduced protocols. The experiments conducted show that our proposals manage to improve PFR's performance in terms of success rate, total amount of energy saved, number of alive sensors and standard deviation of the energy left. Indicatively we note that while PFR's success rate is 69.5%, TWIST is achieving 97.5% and its standard deviation of energy is almost half of that of PFR. © 2008 Springer Berlin Heidelberg.

关键词： Wireless sensor networks

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