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International Conference on computer and Information Technology (CIT)

作者： Raoul Pascal Pein Milton Amador Joan Lu Renz Wolfgang Department of Informatics University of Huddersfield Huddersfield United Kingdom Faculty of Engineering and Computer Science Hamburg University of Applied Sciences Hamburg Germany Dept. IW-SE European Aeronautic Defence and Space Company EADS Innovation Works Munich Germany Multimedia Systems Laboratory (MMLab) Faculty of Engineering and Computer Science Hamburg University of Applied Sciences Berliner Tor 7 20099 Germany

This paper proposes a generic design for 3D model retrieval. It has been developed in cooperation with EADS, which deals with computer Aided Design / computer Aided engineering (below CAD/CAE) data through the product life cycle. Sharing these models with users across the enterprise is a challenging task. CAD/CAE models may be hundreds of megabytes large and stored in proprietary formats. Browsing and previewing this data efficiently requires new tools. One way to leverage the collaboration in and outside of CAD domains is to offer through a repository an access to a neutral 3D data format. Also functionalities for semantic enrichment of 3D models, for the retrieval of context sensitive information and for 3D model retrieval based on 3D similarity search and CBIR techniques should be provided.

关键词： Three dimensional displays Solid modeling Design automation Distributed databases Search engines Engines Feature extraction

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An XML format for benchmarks in high school timetabling 7

An XML format for benchmarks in high school timetabling

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7th International Conference on the Practice and Theory of Automated Timetabling, PATAT 2008

作者： Post, Gerhard Ahmadi, Samad Daskalaki, Sophia Kingston, Jeffrey H. Kyngas, Jari Nurmi, Cimmo Ranson, David Ruizenaar, Henri Department of Applied Mathematics University Twente P.O. Box 217 Enschede7500 AE Netherlands ORTEC Groningenweg 6k Gouda2803 PV Netherlands School of Computer Science De Montfort University Gateway LeicesterLE1 9BH United Kingdom Engineering Sciences Department University of Patras Rio Patras26500 Greece School of Information Technologies University of Sydney Australia Satakunta University of Applied Sciences Tiedepuisto 3 Pori28600 Finland Department of Informatics University of Sussex Falmer BrightonBN1 9QH United Kingdom Stedelijk Lyceum Locatie Kottenpark Lyceumlaan 30 Enschede7522 GK Netherlands

The High School Timetabling Problem is amongst the most widely used timetabling problems. This problem has a varying structure in different high schools even in the same countries or educational systems. Due to lack of standard benchmarks and data formats this problem has been studied less than other timetabling problems in the literature. In this paper we describe the High School Timetabling Problem in several countries in order to find a common set of constraints and objectives. Our main goal is to provide exchangeable benchmarks for this problem. To achieve this we propose a standardisation of data formats suitable for different countries and educational systems. This data model is defined by an xml schema. The schema and datasets are available online. © Practice and Theory of Automated Timetabling, PATAT *** right reserved.

关键词： Scheduling

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Semantic web search for e-government: The case study of intrastat

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Journal of Internet Technology 2007年第4期8卷 457-468页

作者： Markellos, Konstantinos Sakkopoulos, Evangelos Sirmakessis, Spiros Tsakalidis, Athanasios Research Academic Computer Technology Institute Department of Computer Engineering and Informatics University of Patras Greece Department of Applied Informatics in Administration and Economics Technological Educational Institutional of Messolongi University of Patras Greece Department of Computer Engineering and Informatics University of Patras Greece Department of Applied Informatics in Administration and Economy TEI of Messolongi Data Bases and Information Systems Sector E-business and Human Computer Interaction Lab.

The field of Statistics is a conceptually rich domain where information is complex, huge in volume, and highly valuable and critical for Governmental institutes. The daily production of statistical information increases exponentially worldwide, making the processing of all this information a very difficult and time - consuming task. Therefore, efficient search, filtering and browsing techniques are needed to access and process statistical data in an effective way. We present semantically enhanced search approach to enhance e-Govemment searching services. We evaluate our proposals on the case of Intrastat, that is the method of collecting information and producing statistics on the export and import of goods between Member States of the European Union (EU), providing added - value web search services. We employ Semantic Web technologies to create an intelligent search engine based on modeling the systems' electronic catalogue using the OWL ontology language, combined with AJAX techniques for usability richness and responsiveness. We present a search tool based on these technologies, that consists of a) our novel ontology for the EU Combined Nomenclature codes serving as a knowledge base, b)a semantically enhanced search and recommendation module that improves the quality of the results and c) a "Search as you type" visualization and navigation module to provide a usable interface to be used in navigation and search.

关键词： Semantic Web

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Estimation of a partial transmitter contribution to the total electromagnetic field exposure, in a multi-transmitter environment

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WSEAS Transactions on Communications 2007年第5期6卷 675-682页

作者： Stratakis, D. Miaoudakis, A. Farsaris, N. Xenos, T. Zacharopoulos, V. Applied Informatics and Multimedia Department Technological Educational Institute of Crete Electromagnetic Radiation Measurements Laboratory 71004 Heraklion Crete Greece Telecommunications Department Electrical and Computer Engineering Faculty Aristotle University of Thessaloniki Thessaloniki Greece

The equipment used for radiation hazard evaluation usually is based in measuring the total electric field strength over a frequency bandwidth of interest. However, because of the fact that the defined Reference Levels (RL) according to the ICNIRP Guidelines or other specific legislation are frequency dependent, the compliance of a particular RF or microwave transmitter and its contribution to the total received electromagnetic energy at a given measurement location is not easily identifiable. On the other hand, narrowband measurements can be used to determine the incident electric field from every single transmitter. However, in such a case, a large number of measurements are required in order to estimate its contribution to the total electric field strength and consequently to check for compliance with the legislation limits, due to the fact that directional antennas should be used. In this work a method is presented for determining: the total electric field from a particular direction to a specific point of a measurement location (e.g. in the vicinity of a mobile base station), the angle of maximum incident electric field and the total exposure quotient from the sources laying at that particular location in a frequency band of interest.

关键词： Microwave devices

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An XML Framework for Integrating Continuous Queries, Composite Event Detection, and Database Condition Monitoring for Multiple Data Streams

An XML Framework for Integrating Continuous Queries, Composi...

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Dagstuhl Seminar: Event Processing 2007

作者： Urban, Susan D. Dietrich, Suzanne W. Chen, Yi Arizona State University School of Computing and Informatics Department of Computer Science and Engineering TempeAZ United States Arizona State University Department of Mathematical Sciences and Applied Computing PhoenixAZ United States

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Visualization software of the network exterior primal simplex algorithm for the minimum cost network flow problem

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Operational Research 2007年第3期7卷 449-463页

作者： D. Andreou K. Paparrizos N. Samaras A. Sifaleras Department of Computer Science and Engineering University of Crete Heraklion Crete Greece Department of Applied Informatics of University of Macedonia Thessaloniki Greece

The Minimum Cost Network Flow Problem (MCNFP) constitutes perhaps the most important of the research area of Network Optimization. Recently a new category of algorithms for the MCNFP have been developed. These algorithms belong to a special “exterior type” simplex category and they feature significant tree modifications. This paper presents a new didactic tool for the teaching of this type of algorithms. The proposed educational software can be used in courses like “Graph Theory” or “Combinatorial Optimization”. This tool has been implemented using the Java Programming language and it is platform independed. It constitutes a friendly application, for the instructor, as also for the novice student. Furthermore, its use is analytically shown through an illustrative example. Benefits and drawbacks are thoroughly described in order to support the significance of this visualization tool in computer-aided education and also possible future work is discussed.

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A hydraulic solution for actuating a human hand prosthesis

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WSEAS Transactions on Systems 2007年第1期6卷 40-46页

作者： Ungureanu, Loredana Stanciu, Antonius Menyhardt, Karoly Automation and Applied Informatics Department Politehnica University of Timisoara 2 Vasile Parvan Blvd. Timisoara 300223 Romania Computer Science and Engineering Department Politehnica University of Timisoara 2 Vasile Parvan Blvd. Timisoara 300223 Romania Mechanics and Vibrations Department Politehnica University of Timisoara 2 Vasile Parvan Blvd. Timisoara 300223 Romania

The first step in order to obtain good hand prosthesis consists in designing a model, based on the natural one and capable to reflect its architecture and functions. This is the reason why the researchers all over the world give a lot of attention to modeling the human hand. There are quite few solutions for human hand prosthesis, but the main setbacks are that each of them is too complex to be afforded by the majority of patients (especially the ones in underdeveloped countries) and none of them can perform as many tasks as the natural model. Having this in mind, we determined the kinematical and dynamical models of the human hand, to obtain a model as close as possible to the natural one. We realized, also, that if we limit our model's capabilities to the most important function of the hand, namely prehension (considering that the vast majority of potential patients have one good hand for performing delicate actions), then we can obtain an affordable human hand prosthesis with grabbing capabilities, which can help impaired people to manage through most of the daily activities. We propose a hydraulic based solution to actuate our hand prosthesis, which allows us to believe that our model is one of the simpler, yet reliable and non-expensive, among the specific research in the field.

关键词： Actuators

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Knowledge based system for reliable perimeter protection using sensor networks

Knowledge based system for reliable perimeter protection usi...

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WINSYS 2007 - 2nd International Conference on Wireless Information Networks and Systems

作者： Voloencu, Constantin Curiae, Daniel-Loan Banias, Ovidiu Doboli, Alex Dranga, Octavian Automatics and Applied Informatics Department Politehnica University of Timisoara Bd. V. Parvan nr. 2 300223 Timisoara Romania Electrical and Computer Engineering Department State University of New York NY 11794-2350 United States School of Engineering James Cook University Townsville QLD 4811 Australia

This paper provides a strategy for perimeter protection using sensor networks with hardware and analytical redundancy. The sensor network reliability is augmented using a knowledge-based system, which implicates the analysis of the trustworthiness of each sensor. For this, we used two stratagems: one that relies on hardware redundancy based on the Confidence Weighted Voting Algorithm and one that relies on analytical redundancy based on a neural perceptron predictor that uses past and present values obtained from neighbouring nodes. This solution can be also a way to discover the malfunctioning nodes that were subjects of an attack and it is localized at the base station level being suitable even for large-scale sensor networks.

关键词： Neural networks

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Software documents: Comparison and measurement

Software documents: Comparison and measurement

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19th International Conference on Software engineering and Knowledge engineering, SEKE 2007

作者： Arbuckle, Tom Balaban, Adam Peters, Dennis K. Lawford, Mark Department of Computer Science and Information Systems CSIS Building University of Limerick Plassey Park Limerick Ireland Institute of Informatics Warsaw University Banacha 2 02-097 Warsaw Poland Electrical and Computer Engineering Faculty of Engineering and Applied Science Memorial University of Newfoundland St. John's NL A1B 3X5 Canada Department of Computing and Software Faculty of Engineering McMaster University Hamilton ON L8S 4K1 Canada

ISBN: (纸本)9781627486613

For some time now, researchers have been seeking to place software measurement on a more firmly grounded footing by establishing a theoretical basis for software comparison. Although there has been some work on trying to employ information theoretic concepts for the quantification of code documents, particularly on employing entropy and entropy-like measurements, we propose that employing the Similarity Metric of Li, Vit´anyi, and coworkers for the comparison of software documents will lead to the establishment of a theoretically justifiable means of comparing and evaluating software artifacts. In this paper, we review previous work on software measurement with a particular emphasis on information theoretic aspects, we examine the body of work on Kolmogorov complexity (upon which the Similarity Metric is based), and we report on some experiments that lend credence to our proposals. Finally, we discuss the potential advantages derived from the application of this theory to areas in the of software engineering. Copyright © (2007) by Knowledge Systems Institute (KSI).

关键词： Entropy

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Communication and Knowledge Intensive engineering Modeling in Virtual Spaces

Communication and Knowledge Intensive Engineering Modeling i...

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International Symposium on applied Computational Intelligence and informatics ( SACI)

作者： Laszlo Horvath Imre J. Rudas Simona Vaivoda Zsuzsa Preitl Institute of Intelligent Engineering Systems John von Neumann Faculty of Informatics Budapest Hungary Department of Automation and Applied Informatics Fac. of Automation and Computer Science Polytechnic University of Timisoara Timisoara Romania

engineering for development, production, and other product related company activities are being organized in virtual systems for lifecycle management of product data. This new age of engineering is a result of the continuous development for step-by-step moving of product design, analysis and other production engineering activities from conventional environments to modeling environments during the eighties and nineties. However, more developments were needed in knowledge based decision assistance in order to realize modeling of human intent, increasingly complex product structures, and efficient communication of product data. In recent years, a great change of engineering methodology and software produced program products in knowledge technology and advanced local and global communication. Group work of engineers is increasingly organized around special portals for engineering on the Internet. Although intensive research activities produced outstanding methods in knowledge-based solutions for engineering, these methods have not widespread in the industrial modeling practice. This paper attempts to evaluate the possibility that recent communication and knowledge intensive engineering modeling can be developed into communication and knowledge intensive virtual space technology. Paper starts with a discussion on integrated application of different groups of product modeling techniques. Following this, methods are evaluated for the management of product data (PDM). Next section emphasizes aspects, contexts, and intents as primary issues in modeling for relationships in product data and decisions by engineers. Finally, methods for the management of engineering activities for lifecycle of products are summarized, considering communities of engineers around Internet portals.

关键词： Knowledge engineering Data engineering engineering management Portals Internet Production systems Design engineering Product design Production engineering Humans

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