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A Reliable Collision-free TDMA MAC for Sensor Networks

电子学报(英文版) 2009年第4期

作者： BAI Ronggang BAI Ronggang QU Yugui QU Yugui JI Yusheng JI Yusheng Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei 230027 China Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei 230027 China Statc Key Laboratory of Networking and Switching Technology Beijing 100876 China Statc Key Laboratory of Networking and Switching Technology Beijing 100876 China Information Systems Architecture Science Research Division National Institute of Informatics Tokyo Japan Information Systems Architecture Science Research Division National Institute of Informatics Tokyo Japan

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A novel quantum transition in a fully frustrated transverse Ising antiferromagnet

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Journal of Physics: Conference Series 2009年第1期143卷

作者： Chandra, Anjan Kumar Inoue, Jun-Ichi Chakrabarti, Bikas K Centre for Applied Mathematics and Computational Science Saha Institute of Nuclear Physics Kolkata-700064 1/AF Bidhannagar India Complex Systems Engineering Graduate School of Information Science and Technology Hokkaido University Kita-ku Sapporo 060-0814 N14-W9 Japan Centre for Applied Mathematics and Computational Science Theoretical Condensed Matter Physics Division Saha Institute of Nuclear Physics Kolkata-700064 1/AF Bidhannagar India

We consider a long-range Ising antiferromagnet (LRIAF) put in a transverse field. Applying quantum Monte Carlo method, we study the variation of order parameter (spin correlation in Trotter time direction), susceptibility and average energy of the system for various values of the transverse field at different temperatures. The antiferromagnetic order is seen to get immediately broken as soon as the thermal or quantum fluctuations are added. We also discuss the phase diagram for the Sherrington-Kirkpatrick (SK) model with the same LRIAF bias, also in presence of a transverse field. We find that while the antiferromagnetic order is immediately broken as one adds an infinitesimal transverse field or thermal fluctuation to the system, an infinitesimal SK spin glass disorder is enough to induce a stable glass order in the antiferromagnet. This glass order eventually gets destroyed as the thermal or quantum fluctuations increased beyond their threshold values and the transition to para phase occurs. Indications of this novel phase transition are discussed. Because of the presence of full frustration, this surrogate property of the LRIAF for incubation of stable spin glass phase in it (induced by addition of a small disorder) should enable eventually the study of classical and quantum spin glass phases by using some perturbation theory with respect to the disorder. © 2009 IOP Publishing Ltd.

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Analysis and Design of Mobile Model for DTN

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电子学报(英文版) 2009年第4期

作者： LIN Zhiting LIN Zhiting QU Yugui QU Yugui JI Yusheng JI Yusheng ZHAO Baohua ZHAO Baohua Department of Computer Science University of Science and Technology of China Hefei 230027 China Department of Computer Science University of Science and Technology of China Hefei 230027 China Province Key Laboratory of Software in Computing and Communication Hcfei 230027 China Province Key Laboratory of Software in Computing and Communication Hcfei 230027 China Information Systems Architecture Science Research Division National Institute of Info~natics Tokyo Japan) Information Systems Architecture Science Research Division National Institute of Info~natics Tokyo Japan)

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Anti-counterfeit ownership transfer protocol for low cost RFID system

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WSEAS Transactions on Computers 2008年第8期7卷 1149-1158页

作者： Chen, Chin-Ling Chen, Yu-Yi Huang, Yu-Cheng Liu, Chen-Shen Lin, Chia-I. Shih, Tzay-Farn Department of Computer Science and Information Engineering Chaoyang University of Technology Taichung 41349 Taiwan Department of Management Information Systems National Chung Hsing University Taichung 402 Taiwan Innovative Supply-Chain Application Division Identification and Security Technology Center Industrial Technology Research Institute Hsinchu 310 Taiwan

Radio Frequency Identification (RFID) is a new technology. In recent years, it is convenient and feasible in many applications. However, it also addresses many security issues which are worth discussing. The Counterfeit imposes a menace to industry worldwide, and the problem is not specific for certain products or countries. In 2003, Koh et al. describe a RFID system based on "track and trace" solution to apply into pharmaceutical supply chain management to fight the counterfeit. Moreover, there are applications to solve malicious manner were presented. But there always still existed some disputes and not conform Class 1 Generation 2 (C1G2) standards. Unfortunately, the trick is changeable. The Koh et al.'s scheme is at premise rather primitive. In order to tackle this problem, we propose an anti-counterfeit ownership transfer protocol for low cost RFID system. We only use a tag to be a storage media. The proposed scheme can ensure a secure transaction.

关键词： Authentication

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Design and development of a virtual Emergency Operations Center for disaster management research, training, and discovery

Design and development of a virtual Emergency Operations Cen...

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41st Annual Hawaii International Conference on System sciences 2008, HICSS

作者： Becerra-Fernández, Irma Madey, Gregory Prietula, Michael Rodríguez, Domingo Valerdi, Ricardo Wright, Timothy Decision Science and Information Systems Florida International University Computer Science and Engineering University of Notre Dame Decision and Information Analysis Emory University Department of Electrical Engineering University of Puerto Rico - Mayagüez Engineering Systems Division Massachusetts Institute of Technology

ISBN: (纸本)0769530753

This paper describes the implementation plans and research activities of Project Ensayo, which is developing a virtual Emergency Operations Center (vEOC) based on one of the Nation's premier EOC's, that of Miami-Dade County. The goal of the EOC is to coordinate for 'community continuity', in other words help communities remain resilient in the face of disaster events. Organizations of this sort suffer from the lack of normal conditions that permit organizational learning in the traditional sense. The development of the Ensayo vEOC will support a portfolio of research projects including topics related to sensor data, knowledge and social networking modeling, decision-making, software approaches to commitment-based collaboration and coordination, time-critical negotiations under emergencies, and cyber-infrastructure resources. © 2008 IEEE.

关键词： Disasters

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Biaxial tensile experiments of high strength steel alloys

Biaxial tensile experiments of high strength steel alloys

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9th International Conference on technology of Plasticity, ICTP 2008

作者： Andar, M. Kuwabara, Toshihiko Yonemura, Shigeru Uenishi, Akihiro Department of Mechanical Systems Engineering School of Technology Tokyo University of Agriculture and Technology 2-24-16 Naka-cho Koganei-shi TOKYO 184-8588 Japan Division of Advanced Mechanical Systems Engineering Institute of Symbiotic Science and Technology University of Agriculture and Technology 2-24-16 Nakacho Koganei-shi Tokyo 184-8588 Japan Kimitsu R and D Laboratory Nippon Steel Corporation 1 Kimitsu Kimitsu-city Chiba 299-1141 Japan

ISBN: (纸本)9788957081525

Material testing of bake hardenable (BH340) and dual phase (DP590) steel alloys was carried out to elucidate the anisotropic plastic deformation behavior under linear stress paths. Contours of plastic work and the directions of plastic strain rates at different levels of plastic work were measured in the first and second quadrants of stress space. Using the observed data, the applicability of conventional anisotropic yield functions, such as Hill's quadratic function and the Yld2000-2d function, to the accurate prediction of the plastic deformation behavior of the steel alloys is discussed. The measured work contours and the directions of plastic strain rates were in good agreement with those calculated using the Yld2000-2d yield function.

关键词： Alloy steel

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Self-improving empathy learning

Self-improving empathy learning

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5th International Conference on information technology and Applications, ICITA 2008

作者： Legaspi, Roberto Kurihara, Satoshi Fukui, Ken-Ichi Moriyama, Koichi Numao, Masayuki Program Ministry of Education Culture Sports Science and Technology Japan Division of Intelligent Systems Science Institute of Scientific and Industrial Research Osaka University 8-1 Mihogaoka Ibaraki Osaka 567-0047 Japan Graduate School of Information Science and Technology Osaka University 1-5 Yamadaoka Suita Osaka 565-0871 Japan

ISBN: (纸本)9780980326727

Studies have emphasized that empathy is a learnable skill that can be developed through learning from experience. Applying this in the context of human-system interaction, an empathic system is one that automatically acquires an initial knowledge of empathy that is permitted to be incomplete, hence inaccurate and imperfect, but improves this knowledge each time it learns from its interactions with the user until its empathy knowledge matures over time. This paper posits a self-improving empathy learning for user-centric systems. Due to the nature of the problem that centers on incremental experiential learning, this problem becomes a machine learning application. We highlight the need for machine learning techniques that can address the challenge of an empathic system self-improving its empathy model efficiently online from incomplete knowledge through the intelligent use of its experiences. We suggest that the community position itself to investigate empathic reasoning in the context of a self-learning system with machine learning at the core of its AI.

关键词： Computer aided instruction

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Meaning-preserving skolemization on logical structures

Meaning-preserving skolemization on logical structures

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9th International Conference on Intelligent Technologies, Intech'08

作者： Akama, Kiyoshi Nantajeewarawat, Ekawit Division of Large-Scale Computational Systems Information Initiative Center Hokkaido University Hokkaido 060-0811 Japan Computer Science Program Sirindhorn International Institute of Technology Thammasat University Rangsit Campus Pathumthani 12121 Thailand

ISBN: (纸本)9789746152969

Skolemization is a well-known method for removing existential quantifiers from a logical formula. Although it always yields a satisfiability-preserving transformation step, classical Skolemization in general does not preserve the logical meaning of a source formula. Based on a general framework for generating and extending logical structures on specialization systems, we develop in this paper a theory for extending a space of logical formulas by incorporation of function variables and show how meaning-preserving Skolemization can be achieved in an obtained extended space. A procedure for converting a logical formula into an equivalent one in a conjunctive normal form on the extended space is described. This work lays a crucial theoretical foundation for solving logical problems involving existential quantifications based on meaning-preserving formula transformation.

关键词： Conjunctive normal form Equivalent transformation Logical structures Skolemization Specialization systems

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An Architecture for Knowledge-Based Educational Administration System

An Architecture for Knowledge-Based Educational Administrati...

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International Conference on Industrial and information systems, ICIIS

作者： Suneel Kumar B R Natarajan Computer Science & Information Systems group Birla Institute of Technology and Science Pilani India Distance Learning Programmes Division Birla Institute of Technology and Science Pilani India

Developing an intelligent system for educational administration involving knowledge-intensive activities is a challenging task. Hardly adequate architectures exist which allow integration and sharing of multiple knowledge bases inherently distributed logically and physically. The intelligent systems that have been proposed in the contemporary research specifically related to educational domain, intend to cater to the needs of the front-office operations only such as E-Learning, Online Course Management systems, Intelligent Tutoring systems, etc. To offer a more comprehensive solution, the present research paper proposes an architecture for a Knowledge-Based Educational Administration System (KBEAS) to facilitate the workability of back-office operations that span a wide spectrum from routine procedures to highly judgmental issues. Further, an overall architecture of the system is illustrated by considering a case of Work-Integrated-Learning-division of a leading Indian institution to demonstrate the validity and benefits of the knowledge-based technique.

关键词： Intelligent systems Educational technology Computer aided instruction Distance learning information systems Intelligent agent Knowledge management Region 10 Knowledge based systems Space technology

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Extracting topic maps from Web pages by Web link structure and content

Extracting topic maps from Web pages by Web link structure a...

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Congress on Evolutionary Computation

作者： Motohiro Mase Seiji Yamada Katsumi Nitta Department of Computational Intelligence and Systems Science Tokyo Institute of Technology Tokyo Japan Digital Content and media Sciences Research Division National Institute of Information Tokyo Japan

We propose a framework to extract topic maps from a set of Web pages. We use the clustering method with the Web pages and extract the topic map prototypes. We introduced the following two points to the existing clustering method: The first is merging only the linked Web pages, thus extracting the underlying relationships between the topics. The second is introducing weighting based on the similarity from the contents of the Web pages and relevance between topics of pages. The relevance is based on the types of links with directories in the Web sites structure and the distance between the directories in which the pages are located. We generate the topic map prototypes by assuming that the clusters are the topics, the edges are the associations, and the Web pages related to the topics are the occurrences from the results of the clustering. Finally, users complete the prototype by labeling the topics and associations and removing the unnecessary items. We incrementally use a userpsilas evaluation of the topic maps to judge whether a Web page is unnecessary or necessary and then reduce the number of unnecessary pages. We use the relevance feedback along with a Support Vector Machine (SVM) to judge the Web pages. For this paper, at the first step, we mounted the proposed clustering method and conducted experiments to evaluate the effectiveness of extracting topic map prototypes. We eventually discussed the effectiveness of our two additional points by evaluating the extracted topic map prototypes.

关键词： Evolutionary computation information services Prototypes Web pages Data mining History

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