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ICCAS-SICE 2009 - ICROS-SICE International Joint Conference 2009

作者： Kojima, C. Rapisarda, P. Takaba, K. Department of Information Physics and Computing Graduate School of Information Science and Technology University of Tokyo Japan Information: Signals Images Systems Group School of Electronics and Computer Science University of Southampton United Kingdom Dept. of Applied Mathematics and Physics Graduate School of Informatics Kyoto University Japan

ISBN: (纸本)9784907764296

关键词： Lyapunov functions

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Mining patterns of lung infections in chest radiographs

IFIP Advances in Information and Communication Technology

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IFIP Advances in Information and Communication technology 2009年 296卷 205-214页

作者： Tsevas, Spyros Iakovidis, Dimitris K. Papamichalis, George Technological Educational Institute of Lamia Dept. of Informatics and Computer Technology LamiaGR-35100 Greece Chest Hospital of Athens ‘Sotiria’ Greece

Chest radiography is a reference standard and the initial diagnostic test performed in patients who present with signs and symptoms suggesting a pulmonary infection. The most common radiographic manifestation of bacterial pulmonary infections is foci of consolidation. These are visible as bright shadows interfering with the interior lung intensities. The discovery and the assessment of bacterial infections in chest radiographs is a challenging computational task. It has been limitedly addressed as it is subject to image quality variability, content diversity, and deformability of the depicted anatomic structures. In this paper, we propose a novel approach to the discovery of consolidation patterns in chest radiographs. The proposed approach is based on non-negative matrix factorization (NMF) of statistical intensity signatures characterizing the densities of the depicted anatomic structures. Its experimental evaluation demonstrates its capability to recover semantically meaningful information from chest radiographs of patients with bacterial pulmonary infections. Moreover, the results reveal its comparative advantage over the baseline fuzzy C-means clustering approach. ©2009, IFIP Advances in Information and Communication technology. All rights reserved.

关键词： Matrix algebra

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Wavelet usage for feature extraction for crack localization

Wavelet usage for feature extraction for crack localization

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Mediterranean Conference on Control and Automation (MED)

作者： George Georgoulas Chrysostomos Stylios Vassilios Kappatos Evangelos Dermatas Dept. of Computer Applications in Finance and Management TEI of Ionian Islands Lefkas Greece Electrical Engineering Department University of Patras Patras Hellas Dept. of Informatics & Communications Technology TEI of Epirus Arta Greece

In this research work we investigate the analysis of Acoustic Emission (AE) signals using wavelet decomposition to locate a single event (crack), which usually takes place in three typical areas in a ship hull. The problem is a typical classification problem relying on the use of novel features extracted from the AE time series. As in most classification problems the extraction and selection of the most appropriate set of features plays a major role in the overall performance of the method and it is by no means a trivial task. Once a suitable set of features is extracted even ldquosimplerdquo classification models can perform adequately whereas a non-informative set of features even combined with sophisticated classifiers can lead to disappointing results. Here, we exploit the multi-resolution capabilities of wavelet decomposition, so that a set of features is extracted which it is then combined with a simple classifier. The proposed method gives superior classification rates for noisy environments compared to our previous work where conventional methods for feature extraction were deployed.

关键词： Feature extraction Marine vehicles Fatigue Welding Signal processing Inspection Surface cracks Neural networks Wavelet analysis Acoustic emission

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Active Media technology: Preface

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2009年 5820 LNCS卷 V-VI页

作者： Liu, Jiming Wu, Jinglong Yao, Yiyu Nishida, Toyoaki Department of Computer Science Hong Kong Baptist University Kowloon Tong Hong Kong Graduate School of Natural Science and Technology Okayama University Japan Department of Computer Science University of Regina Regina SK Canada Dept. of Intelligence Science and Technology Graduate School of Informatics Kyoto University Japan

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Bidirectionalizing programs with duplication through complementary function derivation

Computer Software

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computer Software 2009年第2期26卷 56-75页

作者： Matsuda, Kazutaka Hu, Zhenjiang Nakano, Keisuke Hamana, Makoto Takeichi, Masato DC Graduate School of Information Science and Technology University of Tokyo Japan Society for the Promotion of Science Japan Information System Architecture Research Division National Institute of Informatics Japan University of Electro-Communications Japan Dept. of Computer Science Gunma University Japan Graduate School of Information Science and Technology University of Tokyo Japan

A bidirectional transformation consists of a pair of unidirectional transformations: a forward transformation that maps one data structure called source to another called view, and a backward transformation that reflects changes in the view to the source. Bidirectional transformation has many useful applications such as replicated data synchronization, presentation-oriented editor development, and software artifact synchronization. In a previous work, we proposed a framework in which a backward transformation is automatically generated from a forward transformation by derivation of a complementary function if the forward transformation is given by a program in a simple functional language. However, the language has a severe restriction that no variable is allowed to be used more than once. In this paper, we show that tupling transformation relaxes this restriction, allowing us to handle a wider class of bidirectional transformations that may contain duplications.

关键词： Functions

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Ageing in a networked society - Social inclusion and mental stimulation 09

Ageing in a networked society - Social inclusion and mental ...

引用

2nd International Conference on PErvasive Technologies Related to Assistive Environments, PETRA 2009

作者： Waterworth, John A. Ballesteros, Soledad Peter, Christian Bieber, Gerald Kreiner, Andreas Wiratanaya, Andreas Polymenakos, Lazaros Wanche-Politis, Sophia Capobianco, Michele Etxeberria, Igone Lundholm, Louise Dept. of Informatics Umeå University Sweden Facultad de Psicología UNED 28040 Madrid Spain Graz University of Technology 8010 Graz Austria Fraunhofer Institute for Computer Graphics Rostock Germany Modernfamilies Gmbh 4040 Linz Austria CanControls 52074 Aachen Germany 11525 Athens Greece 10680 Athens Greece Onda Communication S.P.A. Roveredo in Piano Italy 620002 San Sebastián Spain Skellefteå kommun 931 85 Skellefteå Sweden

ISBN: (纸本)9781605584096

Research into ageing and cognition has demonstrated the close relationship of sensory functioning and social communication to maintaining cognitive performance and mood in the elderly, yet in modern societies elderly people are increasingly isolated and under-stimulated, both physically and psycho-socially. This situation results in accelerated cognitive decline and the suffering associated with loneliness and confusion. Health services cannot keep up with the demand for home visits and day care centres that can alleviate this problem. Incorporating new healthcare technologies for proactive health and elder care into everyday living environments can contribute significantly to support the elderly and their carers and is to become a major priority over the next decade. The approach followed in the AGNES project is to keep the elderly mentally and socially stimulated and in contact with others by combining state detection and social network technologies. This paper provides some scientific background for the chosen approach and describes the technological concept of the project. Copyright 2009 ACM.

关键词： Social sciences computing

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Naturally occurring data as research instrument: Analyzing examination responses to study the novice programmer

SIGCSE Bulletin Inroads

引用

SIGCSE Bulletin Inroads 2009年第4期41卷

作者： Clear, Tony Bouvier, Dennis J. Jacková, Jana Robbins, Phil Lister, Raymond Carter, Paul Lopez, Mike Seppälä, Otto Simon Eckerdal, Anna McCartney, Robert Thompson, Errol School of Comp. and Math. Sciences AUT University New Zealand Department of Computer Science Southern Illinois Univ. Edwardsville United States Faculty of Manag. Sci. and Informatics University of Zilina Slovakia Department of Computer Science University of British Columbia Canada Manukau Institute of Technology New Zealand Dept. of Computer Science and Engineering Helsinki University of Technology Finland Faculty of Science and IT University of Newcastle Australia Dept of Information Technology Uppsala University Sweden Dept Comp. Sci. and Engineering University of Connecticut United States United Kingdom

In New Zealand and Australia, the BRACElet project has been investigating students' acquisition of programming skills in introductory programming courses. The project has explored students' skills in basic syntax, tracing code, understanding code, and writing code, seeking to establish the relationships between these skills. This ITiCSE working group report presents the most recent step in the BRACElet project, which includes replication of earlier analysis using a far broader pool of naturally occurring data, refinement of the SOLO taxonomy in code-explaining questions, extension of the taxonomy to code-writing questions, extension of some earlier studies on students' 'doodling' while answering exam questions, and exploration of a further theoretical basis for work that until now has been primarily empirical.

关键词： Students

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Monitoring the EDGeS project infrastructure

Monitoring the EDGeS project infrastructure

引用

International Symposium on Parallel and Distributed Processing (IPDPS)

作者： Filipe Araujo David Santiago Diogo Ferreira Jorge Farinha Patricio Domingues Luis Moura Silva Etienne Urbah Oleg Lodygensky Haiwu He Attila Csaba Marosi Gabor Gombas Zoltan Balaton Zoltan Farkas Peter Kacsuk Dept. of Informatics Engineering University of Coimbra Portugal Portugal School of Technology and Management Polytechnic Institute of Leiria Portugal LAL Universite Paris Sud France INRIA France MTA SZTAKI Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary MTA SZTAKI Computer and Automation Research Institute of the Hungarian Academy of Sciences H-1528 Budapest Hungary

EDGeS is an European funded Framework Program 7 project that aims to connect desktop and service grids together. While in a desktop grid, personal computers pull jobs when they are idle, in service grids there is a scheduler that pushes jobs to available resources. The work in EDGeS goes well beyond conceptual solutions to bridge these grids together: it reaches as far as actual implementation, standardization, deployment, application porting and training. One of the work packages of this project concerns monitoring the overall EDGeS infrastructure. Currently, this infrastructure includes two types of desktop grids, BOINC and XtremWeb, the EGEE service grid, and a couple of bridges to connect them. In this paper, we describe the monitoring effort in EDGeS: our technical approaches, the goals we achieved, and the plans for future work.

关键词： Electronic mail Bridges Grid computing Processor scheduling computerized monitoring informatics Project management technology management Engineering management Automation

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Towards approximated short cycle reallocation on combinatorial auctions

Computer Software

引用

computer Software 2008年第4期25卷 208-225页

作者： Fukuta, Naoki Ito, Takayuki Faculty of Informatics Shizuoka. University Dept. of Computer Science Nagoya Institute of Technology School of Techno-Business Administration

In this paper, we propose enhanced approximation algorithms of combinatorial auction that are suitable for the purpose of periodical reallocation of items. Our algorithms are designed to effectively reuse the last solutions to speed up initial approximation performance. We present experimental results that show our proposed algorithms outperform existing algorithms in some aspects when the existing bids are not deleted. Also, we propose an enhanced algorithm that effectively avoids undesirable reuse of last solutions in the algorithm This is especially effective when some existing bids are deleted from the last cycle.

关键词： Approximation algorithms

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Using autonomous threshold adjustment to enable multi-party negotiations with multiple interdependent issues

Computer Software

引用

computer Software 2008年第4期25卷 167-180页

作者： Fujita, Katsuhide Ito, Takayuki Hattori, Hiromitsu Dept. of School of Techno-Business Administration Nagoya Institute of Technology Dept. of Computer Science School of Techno-Business Administration Sloan School of Management Dept. of Social Informatics Kyoto University

Multi-issue negotiation protocols represent a promising field since most negotiation problems in the real world involve interdependent multiple issues. Our work focuses on negotiation with interdependent issue and, therefore, nonlinear (multi-optimum) agent utility functions. In this paper, we propose a new threshold adjustment mechanism in which agent who open their local information more than the others. In addition preliminary experimental results demonstrate that the threshold adjusting mechanism can reduce the computational cost, and the amount of private information that is required for an agreement among agent keeping enough optimality.

关键词： Artificial intelligence

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