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Multimedia ICT in vocational training

Multimedia ICT in vocational training

引用

International Symposium on Electronics in Marine (ELMAR)

作者： Pavol Podhradský Peter Trúchly Tomáš Zeman Jaromír Hrad Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology Department of Telecommunications Bratislava Slovak Republic Faculty of Informatics and Information Technologies of the Slovak University of Technology Institute of Computer Systems and Networks Bratislava Slovak Republic Faculty of Electrical Engineering of the Czech Technical University Department of Telecommunications Prague Czech Republic

The paper presents the main ideas of two Leonardo da Vinci (LdV) projects focused on the vocational training. The selected outputs of these projects are presented in more details. The conception of the multilingual terminological dictionary and proposed graphical user interface is also presented in the paper. An example of practical exercises in the area of NGN protocols based on remote access to NGN Lab is described and illustrated.

关键词： Next generation networking Training Multimedia communication Protocols Servers Dictionaries Least squares approximation

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Vision-based human motion analysis in epilepsy - Methods and challenges

Vision-based human motion analysis in epilepsy - Methods and...

引用

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

作者： M. Pediaditis M. Tsiknakis P. Vorgia D. Kafetzopoulos V. Danilatou D. Fotiadis Institute of Health Care Engineering Graz University of Technology Austria Biomedical Informatics Laboratory Institute of Computer Science FORTH Crete Greece Department of Applied Informatics and Multimedia Technological Educational Institute of Crete Greece Mother and Child Division Medical School University of Crete Greece Institute of Molecular Biology and Biotechnology FORTH Crete Greece Department of Materials Science and Engineering University of Ioannina (UoI) Greece

Motion is one of the most important characteristics in clinical epileptology. In developing an integrated motion analysis system for epileptic patients or children with neurological disorders (e.g. ADHD) we surveyed and analyzed current efforts in vision-based human motion analysis in epilepsy as well as all possible forms of motion typically encountered in known epileptic syndromes. This paper presents the results in a systematic way, and includes a critical discussion of methodological and scientific challenges that need to be addressed in this particular domain.

关键词： Variable speed drives Head Biomedical imaging Cameras Epilepsy Image segmentation Pixel

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Using Bi-clustering Algorithm for Analyzing Online Users Activity in a Virtual Campus

Using Bi-clustering Algorithm for Analyzing Online Users Act...

引用

International Conference on Intelligent Networking and Collaborative Systems (INCOS)

作者： Fatos Xhafa Santi Caballé Leonard Barolli Alberto Molina Rozeta Miho Department of Languages and Informatics Systems Technical University of Catalonia Spain Dept. of Languages and Informatics Systems Technical University of Catalonia Spain Department of Computer Science Multimedia & Telecommunication Open University of Catalonia Spain Dept. of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan Faculty of Information Technologies Technical University of Tirana Albania Dept. of Computer Sci. Multimedia & Telecommunication Open University of Catalonia Spain Technical University of Tirana Albania

Data mining algorithms have been proved to be useful for the processing of large data sets in order to extract relevant information and knowledge. Such algorithms are also important for analyzing data collected from the users' activity users. One family of such data analysis is that of mining of log files of online applications that register the actions of online users during long periods of time. A relevant objective in this case is to study the behavior of online users and feedback the design processes of online applications to provide better usability and adaption to users' preferences. The context of this work is that of a virtual campus in which thousands of students and tutors carry out the learning and teaching activity using online applications. The information stored in log files of virtual campuses tend to be large, complex and heterogeneous in nature. Hence, their mining requires both efficient and intelligent processing and analysis of user interaction data during long-term learning activities. In this paper, we present a bi-clustering algorithm for processing large log data sets from the online daily activity of students in a real virtual campus. Our approach is useful to extract relevant knowledge about user activity such as navigation patterns, activities performed as well as to study time parameters related to such activities. The extracted information can be useful not only to students and tutors to stimulate and improve their experience when interacting with the system but also to the designers and developers of the virtual campus in order to better support the online teaching and learning.

关键词： Data mining Web sites Organizations Adaptation model Navigation Registers Context

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JXTA-Overlay P2P Platform and Its Application for Robot Control

JXTA-Overlay P2P Platform and Its Application for Robot Cont...

引用

International Conference on Network-Based Information Systems (NBIS)

作者： Yuichi Ogata Evjola Spaho Keita Matsuo Leonard Barolli Joan Arnedo-Moreno Fatos Xhafa Graduate School of Engineering Fukuoka Institute of Technology Fukuoka Japan Fukuoka Prefectural Kaho-Sogo High School Fukuoka Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Computer Science Multimedia and Telecommunication Open University of Catalonia Barcelona Spain Department of Languages and Informatics Systems Technical University of Catalonia Barcelona Spain

The design of an efficient collaborative multirobot framework that ensures the autonomy and the individual requirements of the involved robots is a very challenging task. This requires designing an efficient platform for inter-robot communication. P2P is a good approach to achieve this goal. P2P aims at making the communication ubiquitous thereby crossing the communication boundary and has many attractive features to use it as a platform for collaborative multi-robot environments. In this work, we present the JXTA Overlay P2P system and its application for robot control. Since JXTA-Overlay is able to overcome Firewalls, Routers and NATs, it is possible to control end-devices in a WAN without changing the network security policy. We used JXTA-Overlay for the control of robot motors. We evaluated the proposed system by many experiments and have shown that the proposed system has a good performance and can be used successfully for robot control.

关键词： Robot control Protocols Robot kinematics Security Peer to peer computing Legged locomotion

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Tb/s switching fabrics for optical interconnects using heterointegration of plasmonics and silicon photonics: The FP7 PLATON approach

Tb/s switching fabrics for optical interconnects using heter...

引用

IEEE Photonics Conference (IPC)

作者： N. Pleros K. Vyrsokinos S. Papaioannou D. Fitsios O. Tsilipakos A. Pitilakis E. Kriezis A. Miliou T. Tekin M. Baus M. Karl D. Kalavrouziotis I. Giannoulis H. Avramopoulos N. Djellali J.-C. Weeber L. Markey A. Dereux J. Gosciniac S. Bozhevolnyi Department of Informatics Aristotle University of Thessaloniki Greece Informatics and Telematics Institute Center for Research and Technology Hellas Greece Department of Electrical and Computer Engineering Aristotle University of Thessaloniki Greece Fraunhofer Institute of Reliability and Microintegration (IZM) Berlin Germany AMO Gesellschaft für Angewandte Mikro-und Optoelektronik GmbH Germany School of Electrical and Computer Engineering National and Technical University of Athens Greece Institut Carnot de Bourgogne University of Burgundy France Faculty of Engineering/Institute of Sensors Signals and Electrotechnics University of Southern Denmark Denmark

We present recent work that is carried out within the FP7 project PLATON on novel Tb/s switch fabric architectures and technologies for optical interconnect applications, employing heterointegration of plasmonics, sil... 详细信息

关键词： Optical switches Switching circuits Silicon Routing Layout Multiplexing

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Mobility Effects of Wireless Multi-hop Networks in Indoor Scenarios

Mobility Effects of Wireless Multi-hop Networks in Indoor Sc...

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International Conference on Advanced Information Networking and Applications (AINA)

作者： Makoto Ikeda Masahiro Hiyama Leonard Barolli Fatos Xhafa Arjan Durresi Makoto Takizawa Fukuoka Institute of Technology Fukuoka Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Languages and Informatics Systems Technical University of Catalonia Barcelona Spain Department of Computer and Information Science Indiana University-Purdue University Indianapolis Indianapolis IN USA Department of Computers and Information Science Seikei University Musashino Tokyo Japan

A Mobile Ad hoc Network (MANET) is a collection of wireless mobile terminals that are able to dynamically form a temporary network without any aid from fixed infrastructure or centralized administration. In recent years, MANETs are continuing to attract the attention for their potential use in several fields such as military activities, rescue operations and time-critical applications. In this paper, we present the implementation and analysis of our implemented wireless multi-hop network testbed considering the Optimized Link State Routing (OLSR) protocol for wireless multi-hop networking. We investigate the effect of mobility and topology changing in MANET. We study the impact of best-effort traffic for non line of sight communication. In this work, we consider three models: stationary, mobility and non line of sight communication models. We assess the performance of our testbed in terms of throughput and packet loss. From the experimental results, we found that OLSR has not a good performance when the relay node is moving. Also, the performance deteriorates when the CBR is higher.

关键词： Spread spectrum communication Mobile ad hoc networks Testing Time factors Routing protocols Wireless application protocol Network topology Telecommunication traffic Traffic control Performance loss

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An Annealing Approach to Router Nodes Placement Problem in Wireless Mesh Networks

An Annealing Approach to Router Nodes Placement Problem in W...

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International Conference on Complex, Intelligent and Software Intensive Systems, CISIS

作者： Fatos Xhafa Christian Sanchez Leonard Barolli Rozeta Miho Department of Computer Science and Information Systems Birkbeck University of London London UK Department of Languages and Informatics Systems Technical University of Catalonia Barcelona Spain Department of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Electronics Technical University of Tirana Tirana Albania

ISBN: (纸本)9781424459179;9780769539676

Mesh router nodes placement is a central problem to Wireless Mesh Networks (WMNs). An efficient placement of mesh router nodes is indispensable for achieving network performance in terms of both network connectivity and user coverage. Unfortunately the problem is computationally hard to solve to optimality even for small deployment areas and a small number of mesh router nodes. As WMNs are becoming an important networking infrastructure for providing cost-efficient broadband wireless connectivity, researchers are paying attention to the resolution of the mesh router placement problem through heuristic approaches in order to achieve near optimal, yet high quality solutions in reasonable time. In this work we propose and evaluate a Simulated Annealing (SA) approach to placement of mesh router nodes in WMNs. The optimization model uses two maximization objectives, namely, the size of the giant component in the network and user coverage. Both objectives are important to deployment of WMNs; the former is crucial to achieve network connectivity while the later is an indicator of the QoS in WMNs. The SA approach distinguishes for its simplicity yet its policy of neighborhood exploration allows to reach promising areas of the solution space where quality solutions could be found. We have experimentally evaluated the SA algorithm through a benchmark of generated instances, varying from small to large size, and capturing different characteristics of WMNs such as topological placements of mesh clients. The experimental results showed the efficiency of the annealing approach for the placement of mesh router nodes in WMNs.

关键词： Wireless mesh networks Simulated annealing Intelligent networks Competitive intelligence Communication system software Software systems computer science Information systems informatics Quality of service

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JOINT ESTIMATION OF DOA AND SPEECH BASED ON EM BEAMFORMING

JOINT ESTIMATION OF DOA AND SPEECH BASED ON EM BEAMFORMING

引用

IEEE International Conference on Acoustics, Speech, and Signal Processing

作者： Lae-Hoon Kim Mark Hasegawa-Johnson Gerasimos Potamianos Vit Libal Department of Electrical and Computer Engineering University of Illinois Urbana IL 61801 USA Institute of Informatics and Telecommunications NCSR "Demokritos" Athens 15310 Greece Data-Centric Technology Group Honeywell Prague Laboratory 14800 Prague 4 Czech Republic

ISBN: (纸本)9781424442959;9781424442966

In this paper, we propose a multi-microphone joint optimal estimation of the direction of arrival (DOA) and the source speech signal through newly introduced EM beamforming. This produces a posterior PDF for the DOA, based only on the reliable speech spectrum. By maximizing over the posterior PDF of the DOA, we achieve maximum a posteriori DOA estimation. After convergence, the estimated source spectrum through weighted sum in the Bayesian sense is a maximum likelihood estimate (MLE). This is a sufficient statistic for minimum mean square error (MMSE) optimal estimation using a subsequent single channel MMSE filter.

关键词： optimal speech enhancement direction of arrival multi-microphone EM beamforming Bayesian beamforming United States department of Agriculture Direction of arrival estimation Speech Angle of arrival Joints maximum likelihood estimation weight sums optimal estimation Mean square error

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Experimental Evaluation of a MANET Testbed in Indoor Stairs Scenarios

Experimental Evaluation of a MANET Testbed in Indoor Stairs ...

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International Conference on Broadband, Wireless Computing, Communication and Applications (BWCCA)

作者： Masahiro Hiyama Makoto Ikeda Leonard Barolli Elis Kulla Fatos Xhafa Arjan Durresi Graduate School of Engineering Fukuoka Institute of Technology Fukuoka Japan Center of Asian and Pacific Studies Seikei University Musashino Tokyo Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Languages and Informatics Systems Technical University of Catalonia Barcelona Spain Department of Computer and Information Science Indiana University-Purdue University Indianapolis Indianapolis IN USA

In recent years, Mobile Ad hoc Networks (MANETs) are continuing to attract the attention for their potential use in several fields. Mobility and the absence of any fixed infrastructure make MANETs very attractive for mobility and rescue operations and time-critical applications. In this paper, we present the implementation and analysis of our implemented MANET testbed considering the Optimized Link State Routing (OLSR) protocol. We consider two models. One when all the nodes are static and another one when one node is moving. The mobile node moves toward the destination at a regular speed and when arrives at the corner of stairs is stops for about three seconds. In this work, we assess the performance of our MANET testbed in terms of throughput and packet loss. From our experiments, we found that the OLSR protocol has a good performance when nodes are in stationary state. However, when the node moves the throughput is decreased. We observed that the number of packet loss increases after 2-hops for static model and after 1-hop for moving model. But, when the node is moving, the packet loss for 2-hops to 4-hops is almost the same.

关键词： Mobile ad hoc networks Throughput Routing protocols Measurement Floors Routing

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Friction compensation of an aeroelastic wing — A TP model transformation based approach

Friction compensation of an aeroelastic wing — A TP model t...

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International Symposium on Intelligent Systems and informatics (SISY)

作者： Béla Takarics Patrícia Gróf Péter Baranyi Péter Korondi Department of Mechatronics Optics and Engineering Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Computer and Automation Research Institute Cognitive Informatics Research Group Budapest Hungary Dep. of Mechatronics Optics and Eng. Informatics Budapest Hungary Dep. of Telecommunications and Media Info. Budapest Univ. of Technology and Economics Budapest Hungary

Various approaches to control aeroelastic wing section with structural nonlinearity emerged in the last years. One of the approaches is based on the Tensor Product (TP) model transformation and the feasibility test of linear matrix inequalities (LMIs) under the Parallel Distributed Compensation framework. The main contribution of this paper is that it extends the previously established qLPV model of the aeroelastic wing section with nonlinear friction. It is proven that the extended model can be exactly described after TP type polytopic decomposition. The qLPV model of the aeroelastic wing section with Coulomb friction was transformed to TP type polytopic model form for which LMI based controller was designed. The designed controller is compared to controllers of other authors dealing with the same problem.

关键词： Friction Mathematical model Force Tensile stress Biological system modeling Numerical models Finite element methods

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