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International Journal of Multimedia and Ubiquitous engineering 2006年第2期1卷 10-18页

作者： Park, Sangjoon Mun, Hyunjoo Choi, Jongmyung Lee, Jongchan Kim, Kwanjoong Park, Gil-Cheol Kim, Byunggi Information and Media Technology Institute Soongsil University Korea Republic of Department of Computer Soongsil University Korea Republic of School of Information Engineering Mokpo National University Korea Republic of Department of Computer Information Kunsan National University Korea Republic of Department of Computer and Information Hanseo University Korea Republic of Department of Multimedia Engineering Hannam University Korea Republic of

B3G (Beyond Third Generation) network consists of access networks to provide heterogeneous network services for mobile users. In this paper, we propose a hierarchical policy-based architecture model and the policy procedures based on access networks connected with B3G networks. We also present a dynamic traffic management scheme which uses DiffServ mechanism and SLA for the management of end-to-end QoS in access networks. At the end of this paper, we will analyze the performance of the proposed schemes through computer simulation.

关键词： Heterogeneous networks

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Wearable vibrotactile systems for virtual contact and information display

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Virtual Reality 2006年第2-3期9卷 203-213页

作者： Lindeman, Robert W. Yanagida, Yasuyuki Noma, Haruo Hosaka, Kenichi Department of Computer Science Worcester Polytechnic Institute Worcester MA 01609-2280 100 Institute Road United States Department of Information Engineering Faculty of Science and Technology Meijo University 468-8502 Nagoya Tempaku-ku 1-501 Shiogamaguchi Japan ATR International Media Information Science Labs Souraku-gun 619-0288 Kyoto 2-2-2 Hikari-dai Seika-cho Japan

This paper presents a development history of a wearable, scalable vibrotactile stimulus delivery system. This history has followed a path from desktop-based, fully wired systems, through hybrid approaches consisting of a wireless connection from the host computer to a body-worn control box and wires to each tactor, to a completely wireless system employing Bluetooth technology to connect directly from the host to each individual tactor unit. Applications for such a system include delivering vibrotactile contact cues to users of virtual environments, providing directional cues in order to increase situational awareness in both real and virtual environments, and for general information display in wearable contexts. Through empirical study, we show that even a simple configuration, such as eight tactors arrayed around the torso, can be effective in increasing situational awareness in a building-clearing task, compared to users who perform the same task without the added cues. © Springer-Verlag London Limited 2005.

关键词： Feedback Human-computer interaction Tactile Vibrotactile Wearable

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Curves in the sand: Algorithmic drawing 18

Curves in the sand: Algorithmic drawing

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18th Annual Canadian Conference on Computational Geometry, CCCG 2006

作者： Damian, Mirela Demaine, Erik D. Demaine, Martin L. Dujmović, Vida El-Khechen, Dania Flatland, Robin Iacono, John Langerman, Stefan Meijer, Henk Ramaswami, Suneeta Souvaine, Diane L. Taslakian, Perouz Toussaint, Godfried T. Department of Computer Science Villanova University United States CSAIL Massachusetts Institute of Technology United States School of Computer Science Carleton University Canada Department of Computer Science and Software Engineering Concordia University Canada Department of Computer Science Siena College United States Department of Computer and Information Science Polytechnic University United States FNRS Départment d’Informatique Université Libre de Bruxelles Belgium School of Computing Queens University Canada Department of Computer Science Rutgers University United States Department of Computer Science Tufts University United States School of Computer Science McGill University Canada Centre for Interdisciplinary Research in Music Media and Technology Schulich School of Music McGill University Canada

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Energy-efficient ID-based group key agreement protocols for wireless networks 06

Energy-efficient ID-based group key agreement protocols for ...

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International Symposium on Parallel and Distributed Processing (IPDPS)

作者： Chik How Tan J.C.M. Teo NISlab Department of Computer Science and Media Technology Gjovik University College Norway Information Communication Institute of Singapore School of Electrical and Electronic Engineering Nanyang Technological University Singapore

ISBN: (纸本)9781424400546

One useful application of wireless networks is for secure group communication, which can be achieved by running a group key agreement (GKA) protocol. One well-known method of providing authentication in GKA protocols is through the use of digital signatures. Traditional certificate-based signature schemes require users to receive and verify digital certificates before verifying the signatures but this process is not required in ID-based signature schemes. In this paper, we present an energy-efficient ID-based authenticated GKA protocol and four energy-efficient ID-based authenticated dynamic protocols, namely join, leave, merge and partition protocol, to handle dynamic group membership events, which are frequent in wireless networks. We provide complexity and energy cost analysis of our protocols and show that our protocols are more energy-efficient and suitable for wireless networks.

关键词： Energy efficiency Wireless application protocol Wireless networks Costs Authentication Digital signatures Public key Computational efficiency computer science Power engineering and energy

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The TactaPack: A Wireless Sensor/Actuator Package for Physical Therapy Applications

The TactaPack: A Wireless Sensor/Actuator Package for Physic...

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International Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems (HAPTICS)

作者： R.W. Lindeman Y. Yanagida K. Hosaka S. Abe Department of Computer Science Worcester Polytechnic Institute USA Department of Information Engineering Faculty of Science and Technology Meijo University Japan Media Information Science Laboratories ATR International Japan Intelligent Robotics and Communication Laboratories ATR International Japan

In this paper, we present preliminary work we have done on designing the TactaPack, a wearable sensor/actuator device that uses a Bluetooth wireless connection to return sensor data to a host, and to receive commands to initiate expressive vibrotactile stimuli. We present our work in the context of a physical therapy application designed to provide more autonomy for patients when performing rehabilitative exercises. This assistive technology has the potential to reduce injuries during therapy due to improper patient joint movement, and decrease the workload of physical therapists, thereby reducing healthcare costs. Though still in the early stages of design, we believe the TactaPack can be used to produce systems that are less cumbersome than current, wired solutions, and simplify the creation of high-level applications by offloading from the CPU to the device the process of sensing, testing against threshold values, and actuation.

关键词： Wireless sensor networks Actuators Packaging Medical treatment Wearable sensors Bluetooth Injuries Medical services Costs System testing

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Efficient Fuzzy Cognitive Modeling for Unstructured information

Efficient Fuzzy Cognitive Modeling for Unstructured Informat...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Kok Wai Wong T.D. Gedeon L.T. Koczy School of Information Technology Murdoch University Perth WA Australia Department of Computer Science Australian National University Canberra ACT Australia Institute of Information Technology Mechanical and Electrical Engineering Széchenyi István University Gyor Hungary Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

This paper presents an efficient fuzzy cognitive modeling which can handle granulation, organisation and causation. This cognitive modeling technique consists of multiple levels where the lowest level includes details required to make a decision or to transfer to the next stage. This fuzzy cognitive modeling will enhance the usability of fuzzy theory in modeling complex systems as well as facilitating complex decision making process based on ill structured or missing information or data.

关键词： Fuzzy systems Machine intelligence Decision making Intelligent systems Fuzzy cognitive maps Humans Power system modeling Usability information systems Artificial intelligence

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Risk Elicitation in Precise and Imprecise Domains - A Comparative Study, Sweden and Brazil

Risk Elicitation in Precise and Imprecise Domains - A Compar...

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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： Ari Riabacke Mona Pahlman Tara Baidya Department of Information Technology and Media/RDALAB Mid Sweden University Sundsvall Sweden Department of Computer and Systems Sciences Stockholm University and Royal Institute of Technology Kista Sweden Department of Industrial Engineering Pontificia Universidade Católica do Rio de Janeiro Rio De Janeiro Brazil

This paper presents a comparative study between two groups from different cultural contexts, Sweden and Brazil, when choosing among risky prospects. The study explores whether there are differences in choice behaviours when the uncertainty in the prospects is expressed as interval estimates instead of the traditional use of point estimates, as well as when prospects are displayed with and without expected monetary values. Both groups display similar choice behaviours when they choose among prospects where uncertainty is expressed as point vs. interval estimates, whereas the Brazilian respondents are more affected by EMV information. The results indicate that the employment of intervals to represent uncertainty can be beneficial and could facilitate the elicitation part in the use and development of decision analytical tools. Furthermore, there is a need for more flexible tools, more adapted to a prescriptive approach, since people from different cultural contexts seem to differ in their choice behaviours.

关键词： Uncertainty Decision making Cultural differences Computational intelligence information technology Industrial engineering Displays Employment Computational modeling Automatic control

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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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Delay-dependent stability of 2D state-delayed linear systems

Delay-dependent stability of 2D state-delayed linear systems

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： W. Paszke J. Lam K. Galkowski Shengyuan Xu E. Rogers A. Kummert Institute of Control and Computation Engineering University of Zielona Góra Zielona Gora Poland Department of Mechanical Engineering University of Hong Kong Hong Kong China Department of Automation Nanjing University of Science and Technology of PLA Nanjing China Faculty of Electrical Information and Media Engineering University of Wuppertal Wuppertal Germany School of Electronics and Computer Science University of Southampton Southampton UK

This paper addresses the problem of stability for two-dimensional systems with delays in the state. To solve this problem, the Lyapunov second method is used. The resulting condition is written in terms of linear matrix inequalities and it is dependent on the size of delays. This fact allows us to reduce the conservatism in the stability analysis of two-dimensional systems with state delays. A simulation example is given to illustrate the theoretical developments

关键词： Stability Linear systems Delay systems Symmetric matrices Control systems Linear matrix inequalities Delay lines Automatic control Control engineering computing Mechanical engineering

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Recent trend of electromagnetic theory in advanced technology and society

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IEEJ Transactions on Fundamentals and Materials 2006年第1期126卷 5-7页

作者： Sato, Toru Miyazaki, Yasumitsu Hayakawa, Masashi Koshiba, Masanori Department of Communications and Computer Engineering Graduate School of Informatics Kyoto University Dakyo-ku Kyoto 606-8501 Department of Electronics and Information Engineering Aichi University of Technology Umanori 50-2 Nishihazama-cho Gamagori 443-0047 University of Electro-Communications 1-5-1 Chofugaoka Chofu 182-8585 Division of Media and Network Technologies Hokkaido University N14 W9 Kita-ku Sapporo 060-0814

Electromagnetic theory is now a universal tool used in a wide variety of leading-edge applications such as nano-technology and environmental monitoring. Under the Technical Committee on Electromagnetic Theory (EMT), three investigating committees are now running to investigate particular subjects;namely, nanometer-electromagnetic waves and X-ray fields technology, natural electromagnetic phenomena and electromagnetic theory, and computational electromagnetics. Recent trends in these fields are briefly overviewed.

关键词： Electromagnetism

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