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IEEE EMBS International Conference on Information technology Applications in Biomedicine (ITAB)

作者： Jesús D. Trigo Franco Chiarugi Álvaro Alesanco Miguel Martínez-Espronceda Luis Serrano Catherine E. Chronaki Javier Escayola Ignacio Martínez José García Communications Technologies Group GTC Aragón Institute for Engineering Research I3A University of Zaragoza Zaragoza Spain Biomedical Informatics Laboratory Institute of Computer Science ICS Foundation for Research and Technology Hellas FORTH Crete Greece Electrical and Electronic Engineering Department Public University of Navarra Spain

The storage and retrieval of digital ECGs in a standard-compliant way has been a key issue during the last decades. The SCP-ECG standard, one of the top efforts in this area, has been recently approved as part of the ISO/IEEE 11073 (x73) family of standards, a reference standard for medical device interoperability. For the Personal Health Device (PHD) version of the x73 standard several devices have been defined, but an ECG device specialization is not yet available. In this paper, the relationships between the SCP-ECG fields and messages and the particular way of the x73-PHD standard to deal with stored data are investigated and discussed. A proof-of-concept implementation of the x73-PHD storage and retrieval method applied to ECGs is also presented, identifying open issues and potential modifications to be considered for the wider interoperability adoption of x73-PHD standards.

关键词： ISO standards Electrocardiography Information retrieval DICOM Medical services Protocols ANSI standards Biomedical engineering XML Information technology

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Further Results on Lyapunov-Krasovskii Functionals via Nonlinear Small-Gain Conditions for Interconnected Retarded iISS Systems

Further Results on Lyapunov-Krasovskii Functionals via Nonli...

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2009 American Control Conference (ACC 2009)

作者： Hiroshi Ito Pierdomenico Pepe Zhong-Ping Jiang Department of Systems Design and Informatics Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan Department of Electrical and Information Engineering University of L'Aquila 67040 Poggio di Roio L'Aquila Italy Department of Electrical and Computer Engineering Polytechnic Institute of New York University Six Metrotech Center Brooklyn NY 11201 USA

ISBN: (纸本)9781424445233

This paper presents further results on the problem of establishing stability of retarded nonlinear interconnected systems comprising integral input-to-state stable subsystems. It is shown that the stability of the interconnected systems with respect to external signals can be verified by constructing Lyapunov-Krasovskii functionals explicitly whenever small-gain type conditions are satisfied. The primary result [12] is generalized in two aspects. One is to introduce a new flexibility in constructing Lyapunov-Krasovskii functionals to deal with distributed delays more effectively. The other is to cover systems involving time-varying delays in interconnecting channels.

关键词： Interconnected systems Stability Control systems Indium tin oxide Delay systems Nonlinear systems Nonlinear control systems Delay effects Time varying systems Networked control systems

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Improved integral channel allocation algorithms in cellular communication systems enabling multimedia QoS services

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WSEAS Transactions on Communications 2008年第10期7卷 1014-1023页

作者： Papazoglou, P.M. Karras, D.A. Papademetriou, R.C. Department of Informatics and Computer Technology Lamia Institute of Technology Greece Department of Automation Engineering Chalkis Institute of Technology Greece Department of Electronic and Computer Engineering University of Portsmouth United Kingdom

While bandwidth management in cellular communication systems has been thoroughly examined for voice channel admission by developing several DCA (Dynamic Channel Assignment) strategies, there are a few only efforts investigating assignment and management of multimedia enabling channels in wireless communications. However, the increasing demand for these advanced services in cellular networks such as data, MMS and video transfers raises the problem of efficient bandwidth management in terms of channel assignment meeting QoS criteria. Several algorithms for supporting QoS services have been presented in the literature based mainly on bandwidth reservation and capacity management for enabling efficient handoff over cellular networks. The goal of this paper is to develop and investigate, however, novel integral DCA algorithms for supporting data (e.g. files) and video (video viewing, video conference) transmission with Quality of Service (QoS), and their evaluation through a prototype advanced statistical simulation environment for cellular communications. Moreover, we analyze the dynamic and distributed channel allocation strategies for enabling advanced multimedia services based on signal purity measures and interference measurements. Finally, the performance of these suggested algorithms evaluated through a proposed prototype simulation environment is discussed.

关键词： Multimedia services

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On a new generation of event scheduling algorithms and evaluation techniques for efficient simulation modelling of large scale cellular networks bandwidth management based on multitasking theory

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WSEAS Transactions on Communications 2008年第10期7卷 1024-1034页

There are many research efforts for improving bandwidth management in wireless communication systems based mainly on DCA (Dynamic Channel Allocation) Schemes designed and evaluated through various Simulation models which, however, use a common simulation model architecture coming from queuing theory. Although much attention has been paid to Channel Allocation Mechanisms there are few only efforts related to the corresponding simulation models. These models consist of various critical components including network services models and the simulation model architecture organizing network events scheduling, network events handling and network performance evaluation. One of the most critical components is the event scheduling mechanism, which reflects network events as they happen in a real network and which has not been investigated in depth regarding its performance. The state of the art event scheduling mechanism called Calendar Queue (CQ) schedules events for later execution based on the corresponding time stamps of each generated event. The major drawback of this approach is that the generated events are executed only sequentially due to progressive time stamps. On the other hand, events in a real wireless network happen concurrently and so the state of the art mechanism can not reflect such conditions. The goal of this paper is to propose an alternative novel real time scheduling mechanism based on a synthesis of multitasking theory and queuing theory techniques, which could be involved in generating and investigating a new generation of event scheduling algorithms suitable for simulation modelling of cellular networks bandwidth management. This mechanism is analyzed through multitasking theory tools and is shown to face effectively the concurrent nature of the generated network events providing an efficient solution to the Calendar Queue problem.

关键词： Multitasking

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An efficient scheduling mechanism for simulating concurrent events in wireless communications based on an improved priority Queue (PQ) TDM layered multi-threading approach

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WSEAS Transactions on Communications 2008年第3期7卷 207-215页

The physical activities of a real wireless network are represented by events which are the main components of a discrete event simulation (DES) system and are produced by its event generator during simulation time. Each network service (e.g. voice, data and video) constitutes an event for a particular mobile user. A critical component within the simulation system, called scheduler, runs by selecting the next earliest event, executing it till completion, and returning to execute the next event. Calendar queue is the state of the art implementation of the scheduler among the most popular networking simulation tools such as ns-2. However, Calendar queue time-stamping mechanism presents drawbacks in the case of complex dynamical systems, like wireless networks, where probability of events concurrency is large. In such a case sequential time-stamping of calendar queue scheduling does not reflect real network events occurrence and generation. It should be remarked that there are very few reports if any in the literature concerning research on events scheduling mechanisms in such real time systems. On the other hand, multi-threading technology offers advanced capabilities for modelling concurrent events. The main goal of this paper is to illustrate that multithreading architectures provide the means for designing efficient schedulers in the simulation of wireless networks resource allocation but, also, several critical issues such as deadlocks, synchronization and scheduling must be effectively faced. In this paper, a stable simulation model is presented based on a novel layered thread architecture and on an alternative network event scheduling mechanism, called the Priority Queue (PQ) - Time Division Multiplexing (TDM) Layered Multithreading mechanism, which supports concurrent events as compared to the state of the art approach which supports only sequential events. Moreover, specific drawbacks of the JVM multi-threading platform such as thread execution unpredictability

关键词： Wireless telecommunication systems

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Automated analysis of Human Protein Atlas immunofluorescence images

Automated analysis of Human Protein Atlas immunofluorescence...

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IEEE International Symposium on Biomedical Imaging

作者： Justin Y. Newberg Jieyue Li Arvind rao Fredrik Ponten Mathias Uhlen Emma Lundberg Robert F. Murphy Center of Bioimage Informatics and Department of Biomedical Engineering Carnegie Mellon University Pittsburgh PA USA Lane Center of Computer Biology and Departments of Biological Sciences and Machine Learning Carnegie Mellon University Pittsburgh PA USA Department of Genetics and Pathology Rudbeck Laboratory Rudbeck Laboratory Uppsala Sweden Department of Biotechnology AlbaNova University Center Royal Institute of Technology Stockholm Sweden Center of Bioimage Informatics and Department of Biomedical Engineering Lane Center of Computer Biol. and Departments of Biological Sciences and Machine Learning Carnegie Mellon University Pittsburgh PA USA

ISBN: (纸本)9781424439317

The Human Protein Atlas is a rich source of location proteomics data. In this work, we present an automated approach for processing and classifying major subcellular patterns in the Atlas images. We demonstrate that two different classification frameworks (support vector machine and random forest) are effective at determining subcellular locations; we can analyze over 3500 Atlas images with a high degree of accuracy, up to 87.5% for all of the samples and 98.5% when only considering samples in whose classification assignments we are most confident. Moreover, the features obtained in both of these frameworks are observed to be highly consistent and generalizable. Additionally, we observe that the features relating the proteins to cell markers are especially important in automated learning approaches.

关键词： Image analysis Humans Proteins Immune system Erbium Image segmentation Support vector machine classification Support vector machines Classification tree analysis Pattern recognition

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Intelligent End-To-End Resource Virtualization Using Service Oriented Architecture

Intelligent End-To-End Resource Virtualization Using Service...

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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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