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Fifth IEE International Conference on 3G Mobile Communication Technologies

作者： Y.-H. Huang J.-Y. Chen W.-S. Chen C.-C. Yang H.-T. Chu Department of Information Networking Technology Hsiuping Institute of Technology Taichung Taiwan Dept. of Inf. Networking Technol. Hsiuping Inst. of Technol. Taichung Taiwan Department of Computer Science and Information Engineering National Chi Nan University Nantou Taiwan VIPCCL Department of Electrical Engineering National Chi Nan University Nantou Taiwan

We address two important components of mobility management: location management and handoff management. Location management including update and paging enables the network to discover the current attachment point of the mobile user for call delivery. Furthermore, we divide the process of location management into two phases. The first phase deals with location update or registration so that the MN periodically notifies the network of its new access point, allowing the network to authenticate the user and revise the user's current location. The second phase performs packet delivery. Here the network is queried for the user's location and the packets are forwarded to the current position of the MN. Handoff management enables the network to maintain a user's connection as the mobile terminal continues to move and change its access points or base stations to the network. Moreover, we bring a number of factors in designing an efficient mobility management protocol, influencing handoff performance. They include handoff control, packet loss and duplication, radio behavior, signaling overhead, path efficiency, passive connectivity and paging.

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Self-assembled interconnection by bamboo-like carbon nanotubes

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Materials Science and engineering C 2004年第1-2期24卷 297-300页

作者： Kim, Sung-Hoon Park, Jung-Chul Kim, Beomjin Lee, Sang Kuk Kim, Dong Uk Kim, Young-Hun Dept. of Nano Mat. Sci./Eng. Silla University 1 San Kwaebop-Dong Sasang-Gu Busan 617-736 Korea Republic of Department of Computer Science Indiana University Purdue University Fort Wayne IN 46805 United States Department of Chemistry Pusan National University Busan 609-735 Korea Republic of Department of Science Education Daegu National Univ. of Education Taegu 705-715 Korea Republic of Department of Physics Korea Adv. Inst. of Sci./Technology Daejeon 305-701 Korea Republic of

Carbon nanotubes (CNTs) could be formed on Si substrate using nickel catalyst under microwave plasma-enhanced chemical vapor deposition system. Under the high, negative-bias voltage (-400 V) condition, we found the formation of the carbon nanotube islands and the bamboo-like carbon nanotube interconnection lines. Most of the bamboo-like carbon nanotubes connected with the carbon nanotubes themselves, which indicates the self-assembled characteristics of the carbon nanotube interconnection lines. The self-assembled characteristics of the bamboo-like carbon nanotube interconnection lines were evaluated using computer-aided image analysis. © 2003 Elsevier B.V. All rights reserved.

关键词： Materials science

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"UML-ising" formal techniques

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) 2004年 3147卷 423-450页

作者： Bjørner, Dines George, Chris W. Haxthausen, Anne E. Madsen, Christian Krog Holmslykke, Steffen Pěnička, Martin Computer Science and Engineering Dept. Informatics and Mathematical Modelling Inst. Technical University of Denmark DK-2800 Kgs. Lyngby Denmark UNU/IIST P.O.Box 3058 China Rovsing A/S Dyregårdsvej 2 DK-2740 Skovlunde Denmark Faculty of Transportation Czech Technical University Na Florenci 25 CZ-11000 Prague 1 Czech Republic

This invited paper presents a number of correlated specifications of example railway system problems. They use a variety of partially or fully integrated formal specification. The paper thus represents a mere repository of what we consider interesting case studies. The existence of the Unified Modeling Language [10,67,36,20] has caused, for one reason or another, the research community to try formalise one or another facet of UML. In this paper we report on another way to achieve what UML attempts to achieve: Broadness of application, convenience of notation, and multiplicity of views. Whether these different UML views are unified, integrated, correlated or merely co-located is for others to dispute. We also seek to support multiple views, but are also in no doubt that there must be sound, well defined relations between such views. We thus report on ways and means of integrating formal techniques such as RAISE (RSL) [58,59], Petri Nets [56,62,37,61,41], Message and Live Sequence Charts [42,43,44,64,13], Statecharts [23,24,26,27], RAISE with Timing (TRSL) [18,45,46], and TRSL with Duration Calculus [79,30]. In this way one achieves a firm foundation for combined uses of these formal development techniques, one that can be believably deployed for as wide a spectrum, or even a wider spectrum of software (and hardware) development, as, respectively than UML. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Petri nets

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Full-band particle-based analysis of device scaling for 3D tri-gate FETs

Full-band particle-based analysis of device scaling for 3D t...

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International Workshop on Computational Electronics

作者： Chinev Branlard Saranitiand Aboud Goodnick Dept. of Electr. & Comput. Eng. Illinois Inst. of Technol. Chicago IL USA Electrical and Computer Engineering Department Illinois Institute of Technology Chicago IL USA Molecular Biophysics Department Rush University Chicago IL USA Department of Electrical Engineering Arizona State University Tempe AZ USA

In this paper, a 3D tri-gate SOI FET with a wrap around gate geometry is studied using a full-band particle-based simulation tool as stated in M. Saraniti et al. (1999) Tri-gate FETs show superior scalability over planar device structures, including a reduction of short channel effects based on F. Yang et al. (2002). The 3D gate structure of the tri-gate FET not only plays a role in reducing DIBL by shielding the electric field lines from the drain, but also improves gate-channel controllability.

关键词： FETs Silicon on insulator technology

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Visions and strategies to improve evaluation of health information systems: Reflections and lessons based on the HIS-EVAL workshop in Innsbruck

Visions and strategies to improve evaluation of health infor...

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作者： Ammenwerth, Elske Brender, Jytte Nykänen, Pirkko Prokosch, Hans-Ulrich Rigby, Michael Talmon, Jan Univ. Hlth. Sci. Med. Info. T. Res. Grp. Assess. Hlth. Info. Syst. Innrain 98 6020 Innsbruck Austria Inst. of Hlth. Technol. and Science University of Aalborg Aalborg Denmark Department of Computer Sciences Tampere University Tampere Finland Dept. Med. Info. Biometr. E. University of Erlangen Erlangen Germany Ctr. for Hlth. Plan. and Management Keele University Keele United Kingdom Department of Medical Informatics Maastricht University Maastricht Netherlands

Background: Health care is entering the Information Society. It is evident that the use of modern information and communication technology offers tremendous opportunities to improve health care. However, there are also hazards associated with information technology in health care. Evaluation is a means to assess the quality, value, effects and impacts of information technology and applications in the health care environment, to improve health information applications and to enable the emergence of an evidence-based health informatics profession and practice. Objective: In order to identify and address the frequent problems of getting evaluation understood and recognised, to promote transdisciplinary exchange within evaluation research, and to promote European cooperation, the Exploratory Workshop on "New Approaches to the Systematic Evaluation of Health Information Systems" (HIS-EVAL) was organized by the University for Health Sciences, Medical informatics and technology (UMIT), Innsbruck, Austria, in April 2003 with sponsorship from the European Science Foundation (ESF). Methods: The overall program was structured in three main parts: (a) discussion of problems and barriers to evaluation;(b) defining our visions and strategies with regard to evaluation of health information systems;and (c) organizing short-term and long-term activities to reach those visions and strategies. Results: The workshop participants agreed on the Declaration of Innsbruck (see Appendix B), comprising four observations and 12 recommendations with regard to evaluation of health information systems. Future activities comprise European networking as well as the development of guidelines and standards for evaluation studies. Conclusion: The HIS-EVAL workshop was intended to be the starting point for setting up a network of European scientists working on evaluation of health information systems, to obtain synergy effects by combining the research traditions from different evaluation fields, leadi

关键词： Medical imaging

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Balancing of Transfer Lines with Simultaneously Activated Spindles

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IFAC Proceedings Volumes 2004年第4期37卷 45-50页

作者： Alexandre Dolgui Nikolai Guschinsky Genrikh Levin Mohamed-Aly Louly Sana Belmokhtar Scientific Methods for Industrial Management Dept. (MSGI) Industrial Engineering and Computer Sciences Center (G2I) Ecole des Mines de Saint Etienne 158 cours Fauriel 42023 Saint Etienne Cedex 2 France United Institute of Informatics Problems National Academy of Sciences of Belarus Surganov Street 6 220012 Minsk Belarus Laboratory for Industrial Systems Optimisation (LOSI) University of Technology of Troyes 12 rue Marie Curie 10010 Troyes France

A balancing problem for transfer lines with parallel spindles is investigated. All spindle heads of the same workstation are activated simultaneously. The relations of the necessity of executing some operations at the same workstation, the possibility of combining the spindles at the same workstation as well as precedence constraints are given. The problem is to choose spindle heads from a given set and allocate them to workstations in such a way that i) all the operations are performed, ii) all constraints are satisfied, iii) the cycle time is provided, and iv) the line cost is minimal. The proposed method for solving the problem is based on its formulation as a mixed integer problem (MIP).

关键词： Machining line balancing optimization MIP

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Experimental design and molecular modeling of novel graft copolymers

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Polymer News 2004年第10期29卷 302-310页

作者： Sumpter, Bobby G. Mays, Jimmy W. Noid, Donald W. Gido, Samuel P. Weidisch, Roland Computer Science Division Oak Ridge National Laboratory Oak Ridge TN 37831 United States Department of Chemistry University of Tennessee Knoxville TN 37996 United States Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 United States Dept. of Poly. Sci. and Engineering University of Massachusetts Amherst MA 01003 United States Leibnitz-Inst. of Polymer Research Dresden D-01069 Germany

The tensile properties of tetra-functional multigraft copolymers have been shown to have surprising high strain at break (∼2100%), about double that of commercial thermoplastic elastomers such as Kraton! Currently, multigraft copolymers can be synthesized with a variety of branches (single, bi, tri-, tetra, and with different lengths) at each branch point and there can be a large number of branch points per molecule that are regularly, randomly, or heterogeneously spaced, each of which can have effects on mechanical properties. Unfortunately experimental synthesis and characterization of these novel polymer systems is quite time consuming. This is where molecular modeling and simulation can be critical for mapping out the fundamental mechanisms responsible for the observed behavior and to optimize/focus the experimental efforts. In this article we report details of our experimental synthetic and characterization effort along with some preliminary results from molecular dynamics, molecular mechanics, Monte Carlo, and normal mode analysis on tri- and tetra-functional, multibranch graft copolymers consisting of a polyisoprene backbone and polystyrene branches.

关键词： Graft copolymers

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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) 2004年 3139卷 V-VI页

作者： Iida, Fumiya Pfeifer, Rolf Steels, Luc Kuniyoshi, Yasuo University of Zurich Artificial Intelligence Laboratory Department of Informatics Andreasstr. 15 Zurich Switzerland Vrije Universiteit Brussel Artificial Intelligence Laboratory and Sony Computer Science Laboratory Department of Informatics Pleinlaan 2 Brussels Belgium University of Tokyo School of Information Science and Technology Dept. of Mechano-Informatics Laboratory for Intelligent Systems and Informatics Engineering Bldg. 8 7-3-1 Hongo Bunkyo-kuTokyo Japan

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Issues for the performance monitoring on networked virtual environments: The case of EVE 7

Issues for the performance monitoring on networked virtual e...

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7th International Conference on Telecommunications, ConTEL 2003

作者： Bouras, C. Giannaka, E. Tsiatsos, Th. Research Academic Computer Technology Institute Computer Engineering and Informatics Dept. Univ. of Patras Patra Greece

ISBN: (纸本)9531840520

The wide expansion and increasing demand for Networked Virtual Environments resulted in efforts for the optimization of these environments with the enhancement of advanced features, which offered extended functionality and created an improved sense of realism. However, the added functionality often creates resource overhead both in the system as well as in the network host, which results in performance reduction. This paper presents such a networked virtual environment and based on the system's architecture tries to trace down with the time and recourse consuming parameters and proposes models on which a networked virtual environment, like the one presented, could achieve optimization of its performance. © 2003, inst.tute of Electrical and Electronics Engineers Inc. All rights reserved.

关键词： Virtual reality

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Offering open hypermedia services to the WWW: A step-by-step approach for developers 03

Offering open hypermedia services to the WWW: A step-by-step...

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12th International Conference on World Wide Web, WWW 2003

作者： Karousos, Nikos Pandis, Ippokratis Reich, Siegfried Tzagarakis, Manolis Research Academic Computer Technology Institute 26500 Rion Greece Dept. of Computer Engineering and Informatics University of Patras 26500 Rion Greece Salzburg Research Austria

ISBN: (纸本)1581136803

Hypermedia systems and more specifically open hypermedia systems (OHS) provide a rich set of implementations of different hypertext flavors such as navigational hypertext, spatial hypertext or taxonomic hypertext. Additionally, these systems offer component-based modular architectures and address interoperability between hypertext domains. Despite multiple efforts of integrating Web clients, a widespread adoption of OHS technology by Web developers has not taken place. In this paper it is argued that Web Services - which offer a component model for Web applications - can be integrated in OHSs. An architectural integration is proposed, a step-by-step process is outlined and an example of integration is provided. This very approach is aimed to benefit both worlds: the Web community with new rich hypermedia functionality that extends the current navigational hypermedia, and the OHS community by opening its tools and platforms to the many developer groups of the Web community.

关键词： Hypermedia systems

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