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Proceedings of the 12th Computing: The Australasian Theroy Symposium - Volume 51

作者： Yuichi Asahiro Eiji Miyano Hirotaka Ono Kouhei Zenmyo Department of Social Information Systems Kyushu Sangyo University Fukuoka Japan Department of Systems Innovation and Informatics Kyushu Institute of Technology Fukuoka Japan Department of Computer Science and Communication Engineering Kyushu University Fukuoka Japan

ISBN: (纸本)9781920682330

We study the problem of orienting the edges of a weighted graph such that the maximum weighted out-degree of vertices is minimized. This problem, which has applications in the guard arrangement for example, can be shown to be NP-hard generally. In this paper we first give optimal orientation algorithms which run in polynomial time for the following special cases: (i) the input is an unweighted graph, or more generally, a graph with identically weighted edges, and (ii) the input graph is a tree. Then, by using those algorithms as sub-procedures, we provide a simple, combinatorial, min{wmax/wmin, (2-ε)}-approximation algorithm for the general case, where wmax and wmin are the maximum and the minimum weights of edges, respectively, and ε is some small positive real number that depends on the input.

关键词： approximation algorithms graph orientation min-max optimization NP-hardness

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Evaluation of a Network Extraction Topology Algorithm for Reducing Search Space of a GA-based Routing Approach

Evaluation of a Network Extraction Topology Algorithm for Re...

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International Conference on Distributed Computing Systems Workshop

作者： M. Ikeda L. Barolli G. De Marco A. Durresi A. Koyama M. Durresi Graduate School of Engineering Fukuoka Institute of Technology (FIT) Higashi-ku Japan Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) Higashi-ku Japan Department of Computer Science Louisiana State University Baton Rouge Louisiana USA Department of Informatics Yamagata University Yonezawa Japan

In order to support multimedia communication, it is necessary to develop routing algorithms which use for routing more than one QoS parameters. This is because new services such as video on demand and remote meeting systems require better QoS. Also, for admission control of multimedia applications different QoS parameters should be considered. In our previous work, we proposed an intelligent routing and CAC strategy using cooperative agents. The proposed routing algorithm is a combination of source and distributed routing. However, in the previous research, we only considered the time delay for the routing. Also, QoS and congestion control parameters were considered just as indicators of QoS satisfication and congestion. In this work, we extend our previous work by proposing and implementing new algorithms based on fuzzy logic and genetic algorithm which use for admission control and routing many QoS parameters. Also, we evaluate by simulations the performance of the network extraction topology algorithm which reduces the search space of the proposed GA-based routing approach. Thus, the GA can find a feasible route very fast.

关键词： Network topology Routing Quality of service Space technology Admission control Fuzzy logic Broadband communication Multimedia communication Video on demand Scalability

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Generalised Weighted Relevance Aggregation Operators for Hierarchical Fuzzy Signatures

Generalised Weighted Relevance Aggregation Operators for Hie...

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International Conference on Computational Intelligence for Modelling, Control and Automation, and International Conference on Intelligent Agents, Web Technologies and Internet Commerce

作者： B. S. U. Mendis T. D. Gedeon J. Botzheim L. T. Koczy Department of Computer Science Australian National University Canberra Australia College of Engineering and Computer Science Australian National University Canberra Australia Department of Telec. & Media Informatics Budapest University of Technology and Economics Budapest Hungary Institute of Information Tech and Elec. Engineering Széchenyi István University Gyor Hungary

Hierarchical Fuzzy Signatures are generalizations of the Vector Valued Fuzzy Set concept introduced in the 1970s. A crucial question in the Fuzzy Signature context is what kinds of aggregations are applicable for combining data with partly different substructures. Our earlier work introduced the Weighted Relevance Aggregation method to enhance the accuracy of the final results of calculations based on Hierarchical Fuzzy Signature Structures. In this paper, we further generalise the weights and the aggregation into a new operator called Weighted Relevance Aggregation Operator (WraO). WraO enhances the adaptability of the fuzzy signature model to different applications and simplifies the learning of fuzzy signature models from data. We also show the methodology of learning these aggregation operators from data.

关键词： Fuzzy sets computer science Computational intelligence Educational institutions informatics Humans Problem-solving Skeleton Medical diagnostic imaging Computational modeling

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Image Complexity and Feature Extraction for Steganalysis of LSB Matching Steganography

Image Complexity and Feature Extraction for Steganalysis of ...

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International Conference on Pattern Recognition

作者： Qingzhong Liu A.H. Sung Jianyun Xu B.M. Ribeiro Department of Computer Science New Mexico Technology Socorro NM USA Institute for Complex Additive Systems Analysis New Mexico Technology Socorro NM USA Microsoft Corporation Redmond WA USA Department of Informatics Engineering University of Coimbra Coimbra Portugal

ISBN: (纸本)0769525210

In this paper, we present a scheme for steganalysis of LSB matching steganography based on feature extraction and pattern recognition techniques. Shape parameter of generalized Gaussian distribution (GGD) in the wavelet domain is introduced to measure image complexity. Several statistical pattern recognition algorithms are applied to train and classify the feature sets. Comparison of our method and others indicates our method is highly competitive. It is highly efficient for color image steganalysis. It is also efficient for grayscale steganalysis in the low image complexity domain

关键词： Feature extraction Steganography Pattern recognition Shape measurement Wavelet domain Pattern matching Gaussian distribution Gray-scale Maximum likelihood estimation computer science

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COST292 experimental framework for TRECVID 2006

COST292 experimental framework for TRECVID 2006

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TREC Video Retrieval Evaluation, TRECVID 2006

作者： Ćalić, J. Krämer, P. Naci, U. Vrochidis, S. Aksoy, S. Zhangk, Q. Benois-Pineau, J. Saracoglu, A. Doulaverakis, C. Jarina, R. Campbell, N. Mezaris, V. Kompatsiaris, I. Spyrou, E. Koumoulos, G. Avrithis, Y. Dalkilic, A. Alatan, A. Hanjalic, A. Izquierdo, E. Dept. of Computer Science University of Bristol 2.11 MVB Woodland Road Bristol BS8 1UB United Kingdom LaBRI University of Bordeaux 1 351 cours de la Libération F-33405 Talence France Delft University of Technology Mekelweg 4 2628CD Delft Netherlands Informatics and Telematics Institute Centre for Research and Technology Hellas Thermi-Panorama Road P.O. Box 361 57001 Thermi-Thessaloniki Greece Department of Computer Engineering Bilkent University Bilkent 06800 Ankara Turkey Department of Electronic Engineering Queen Mary University of London Mile End London E1 4NS United Kingdom Department Of Electrical and Electronics Engineering Middle East Technical University 06531 Ankara Turkey Image Video and Multimedia Laboratory National Technical University of Athens 9 Iroon Polytechniou Str 157 80 Athens Greece Department of Computer Engineering Hacettepe University Cankaya 06532 Ankara Turkey Department of Telecommunications University of Zilina Univerzitna 1 010 26 Zilina Slovakia

In this paper we give an overview of the four TRECVID tasks submitted by COST292, European network of institutions in the area of semantic multimodal analysis and retrieval of digital video media. Initially, we present shot boundary evaluation method based on results merged using a confidence measure. The two SB detectors user here are presented, one of the Technical University of Delft and one of the LaBRI, University of Bordeaux 1, followed by the description of the merging algorithm. The high-level feature extraction task comprises three separate systems. The first system, developed by the National Technical University of Athens (NTUA) utilises a set of MPEG-7 low-level descriptors and Latent Semantic Analysis to detect the features. The second system, developed by Bilkent University, uses a Bayesian classifier trained with a "bag of subregions" for each keyframe. The third system by the Middle East Technical University (METU) exploits textual information in the video using character recognition methodology. The system submitted to the search task is an interactive retrieval application developed by Queen Mary, University of London, University of Zilina and ITI from Thessaloniki, combining basic retrieval functionalities in various modalities (i.e. visual, audio, textual) with a user interface supporting the submission of queries using any combination of the available retrieval tools and the accumulation of relevant retrieval results over all queries submitted by a single user during a specified time interval. Finally, the rushes task submission comprises a video summarisation and browsing system specifically designed to intuitively and efficiently presents rushes material in video production environment. This system is a result of joint work of University of Bristol, Technical University of Delft and LaBRI, University of Bordeaux 1.

关键词： Semantics

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Learning system for human motion characters of traditional arts

Learning system for human motion characters of traditional a...

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13th ACM Symposium Virtual Reality Software and technology, VRST'06

作者： Maekawa, Yoshinori Oda, Takuya Komura, Taku Shinagawa, Yoshihisa Department of Information Systems Engineering Osaka Sangyo University 3-1-1 Nakagaito Daito Osaka Japan Graduate School of Information Science and Technology Osaka University 2-1 Yamadaoka Suita Osaka Japan School of Informatics University of Edinburgh Appleton Tower Crichton Street Edinburgh EH8 9LE United Kingdom Department of Electrical and Computer Engineering Beckman Institute University of Illinois at Urbana-Champaign 405 N. Mathews Ave. Urbana IL United States

ISBN: (纸本)1595933212

A useful learning system for human motion characters of traditional arts, such as Mai (Japanese classic dance), Kabuki (one of Japan's traditional stage arts), etc., is being developed. In such arts an effective system to pass the tradition down from a top artist to next generations is required. Video contents are generally used to pass the human motions in traditional arts down for non-experts. However, the video contents normally show the human motions as the views from a single direction. If the human motions are presented from orthogonal three-directions at the same time, it comes more useful. So, our learning system produces the three-dimensional human motion by the sequences of views from a single direction in the video contents, then, the motions from any directions can be presented simultaneously with the video *** addition, a learner can check the difference in motion between a top artist and him/herself by the producing his/her three-dimensional skeleton motion with our system and the overlapping it with one of the top artist. Here, in the comparison between two different physiques (a top artist and a learner) a simple adjustment method is *** our study standard motion capture processes are employed, but our goal is to develop an original practical training system of performers' motion for beginners in traditional arts. In this paper the developing system is demonstrated for Kyo-mai (Mai originated in Kyoto) as example. The developing system can be useful not only in performing arts but also in industry or in sports. Copyright 2006 ACM.

关键词： Learning systems

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Terahertz semiconductor quantum well devices

Pan Tao Ti Hsueh Pao/Chinese Journal of Semiconductors

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Pan Tao Ti Hsueh Pao/Chinese Journal of Semiconductors 2006年第4期27卷 627-634页

作者： Liu, H.C. Luo, H. Ban, D. Wächter, M. Song, C.Y. Wäsilewski, Z.R. Buchanan, M. Aers, G.C. SpringThorpe, A.J. Cao, J.C. Feng, S.L. Williams, B.S. Hu, Q. Institute for Microstructural Sciences National Research Council Ottawa K1A 0R6 Canada State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China Research Laboratory of Electronics Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 United States

For eventually providing terahertz science with compact and convenient devices, terahertz (1-10 THz) quantum-well photodetectors and quantum-cascade lasers are investigated. The design and projected detector performance are presented together with experimental results for several test devices, all working at photon energies below and around optical phonons. Background limited infrared performance (BLIP) operations are observed for all samples (three in total), designed for different wavelengths. BLIP temperatures of 17, 13, and 12 K are achieved for peak detection frequencies of 9.7 THz (31μm), 5.4 THz(56 μm), and 3.2 THz(93 μm).respectively. A set of THz quantum-cascade lasers with identical device parameters except for doping concentration is studied. The S-doping density for each period varies from 3.2 × 1010 to 4.8 × 1010 cm2. We observe that the lasing threshold current density increases monotonically with doping concentration. Moreover, the measurements for devices with different cavity lengths provide evidence that the free carrier absorption causes the waveguide loss also to increase monotonically. Interestingly the observed maximum lasing temperature is best at a doping density of 3.6 × 1010 cm-2.

关键词： Semiconductor quantum wells

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A Healthcare Pattern Collection for Rural Telemedicine Services

A Healthcare Pattern Collection for Rural Telemedicine Servi...

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International Conference on e-health Networking, Applications and Services (HealthCom)

作者： Po-Hsun Cheng Jer-Junn Luh Ming-Fong Shyu Heng-Shuen Chen Sao-Jie Chen Jin-Shin Lai Feipei Lai Information Systems National Taiwan University Hospital Taipei Taiwan School & Graduate Institute of Physical Therapy College of Medicine National Taiwan University Taipei Taiwan Department of Computer Science & Information Engineering Chao Yang University of Technology Taipei Taiwan Department of Family and Department of Medical Informatics National Taiwan University Hospital Taipei Taiwan Graduate Institute of Electronics Engineering & Depertment of Electrical Engineering National Taiwan University Taipei Taiwan Department of Physical Medicine & Rehabilitation & Department of Medical Informatics National Taiwan University Hospital National Taiwan University College of Medicine Taipei Taiwan Department of Computer Science & Information Engineering National Taiwan University Taipei Taiwan

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Context-based model for mobile electronic medical records

Context-based model for mobile electronic medical records

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International Conference on e-health Networking, Applications and Services (HealthCom)

作者： Fong-Ming Shyu Po-Hsun Cheng Mei-Juh Su Jer-Junn Luh Heng-Shuen Chen Sao-Jie Chen Department of Computer Science and Information Engineering Chao Yang University of Technology Taichung Taiwan Information Systems Graduate Institute of Electronics Engineering and Department of Electrical Engineering National Taiwan University Hospital Taipei Taiwan Graduate Institute of Electronics Engineering and Department of Electrical Engineering National Taiwan University Taipei Taiwan School & Graduate Institute of Physical Therapy College of Medicine National Taiwan University Taipei Taiwan Department of Family and Department of Medical Informatics National Taiwan University Hospital Taipei Taiwan

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Overview of research and development on seamless networking technologies

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Journal of the National institute of Information and Communications technology 2006年第4期53卷 91-100页

作者： Morikawa, Hiroyuki Inoue, Masugi Hasegaw, Mikio Murakami, Homare Mahmud, Khaled Ryoki, Nobuo Pyo, Chang Woo Tran, Ha Nguyen Minami, Masateru Teraoka, Fumio Department of Frontier Informatics Graduate School of Frontier Sciences University of Tokyo Ubiquitous Mobile Communications Group New Generation Wireless Communications Research Center North South University Bangladesh Department of Electronic Engineering Faculty of Engineering Shibaura Institute of Technology Network Architecture Group New Generation Network Research Center Kyushu Research Center Collaborative Research Management Group Department of Information and Computer Science Faculty of Science and Technology Keio University

National institute of Information and Communications technology of Japan (NICT) completed a project on new-generation mobile communications networks for beyond 3G or 4G in March 2006. This paper presents our vision of new-generation mobile communications networks from networking perspective and their capabilities to be offered: fast and large-capacity handover, cross-network handover, cross-device handover, and interworking between real and cyber worlds. Then, Metro Mobile Ring network technology for the first capability, MIraI architecture for the second and third capabilities, and other works are presented.

关键词： Research and development management

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