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Frontiers in Optics, FiO 2005

作者： Gibbons, Robert C. Gilstrap, Jeff A. Mait, Joseph N. Prather, Dennis W. Guo, Junpeng Brady, David J. Raytheon Company Network Centric Systems/Combat Systems 2501 West University Drive McKinney Texas 75071 United States US Army Research Laboratory AMSRD-ARL-SE-R 2800 Powder Mill Road Adelphi MD 20783-1197 United States Department of Electrical and Computer Engineering University of Delaware 140 Evans Hall Newark DE 19716 United States Electrical and Computer Engineering Department Duke University Durham North Carolina 27708 United States

We have designed a thin, multiplexed infrared imaging system that uses a diffractive element for generating shift-encoded images in each aperture. We present preliminary experimental results that demonstrate imager pe... 详细信息

ISBN: (纸本)1557527970

关键词： Electronics Infrared systems Point spread function Signal processing Diffractive optics (050.1970) Infrared imaging (110.3080) Multiple imaging (110.4190)

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Guest editorial wireless overlay networks based on mobile IPv6

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IEEE Journal on Selected Areas in Communications 2005年第11期23卷 2089-2090页

作者： Chao, Han-Chieh Huang, Nen-Fu Kuo, Sy-Yen Perkins, Charles E. Stuttgen, Heinrich Bux, W. National Ilan University Department of Electronic Engineering I-Lan 260 Taiwan National Tsing Hua University Department of Computer Science Hsin-Chu 300 Taiwan National Taiwan University Department of Electrical Engineering Taipei 106 Taiwan Nokia Research Center Communication Systems Laboratory Mountain View CA 94043 United States NEC Europe Ltd. Network Laboratories Heidelberg D 69115 Heidelberg Germany Department of Electronic Engineering Taiwan Library and Information Technology Office National Ilan University I-Lan Taiwan IPv6 Steering Committee Taiwan Taiwan IPv6 Forum Taiwan Department of Computer Science National Tsing Hua University Taiwan IPv6 Working Group NICI Ipv6 Steering Committee IPv6 Forum Taiwan Department of Electrical Engineering National Taiwan University Taiwan Computer Science and Engineering Department Chinese University of Hong Kong Hong Kong IEEE Computer Society Networking Technology Laboratory Nokia Research Center Mountain View CA United States IEEE Vehicular Technology Conference Networking Track NEC Europe Ltd. Germany NEC's Network Laboratories Heidelberg Germany Board of Governors IEEE Communications Society Japan Department of ComSoc's Switching Routing Technical Committee

No abstract available

关键词： Internet Wireless networks Mobile computing computer networks Land mobile radio cellular systems Access protocols GSM Pervasive computing Mobile communication computer architecture

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Evolution, generality and robustness of emerged surrounding behavior in continuous predators-prey pursuit problem

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Genetic Programming and Evolvable Machines 2005年第3期6卷 301-318页

作者： Tanev, Ivan Brzozowski, Michael Shimohara, Katsunori Department of Information Systems Design Faculty of Engineering Doshisha University 1-3 Miyakodani Tatara Kyotanabe Kyoto 610-0321 Japan ATR Network Informatics Laboratories 2-2-2 Hikaridai Keihanna Sci. City Kyoto 619-0288 Japan Department of Computer Science Stanford University Stanford CA 94305 United States Graduate School of Informatics Kyoto University Yoshida-Honmachi Sakyo-ku Kyoto 606-8501 Japan

We present the result of our work on the use of strongly typed genetic programming with exception handling capabilities for the evolution of surrounding behavior of agents situated in an inherently cooperative environment. The predators-prey pursuit problem is used to verify our hypothesis that relatively complex surrounding behavior may emerge from simple, implicit, locally defined, and therefore-scalable interactions between the predator agents. Proposing two different communication mechanisms ((i) simple, basic mechanism of implicit interaction, and (ii) explicit communications among the predator agents) we present a comparative analysis of the implications of these communication mechanisms on evolution, generality and robustness of the emerged surrounding behavior. We demonstrate that relatively complex-surrounding behavior emerges even from implicit, proximity-defined interactions among the agents. Although the basic model offers the benefits of simplicity and scalability, compared to the enhanced model of explicit communications among the agents, it features increased computational effort and inferior generality and robustness of agents' emergent surrounding behavior when the team of predator agents is evolved in noiseless environment and then tested in noisy and uncertain environment. Evolution in noisy environment virtually equalizes the robustness and generality characteristics of both models. For both models however the increase of noise levels during the evolution is associated with evolving solutions, which are more robust to noise but less general to new, unknown initial situations. © 2005 Springer Science + Business Media, Inc.

关键词： Robustness (control systems)

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Long-haul ASK and DPSK Optical Fibre Transmission systems: Simulink Modeling and Experimental Demonstration Test-Beds

Long-haul ASK and DPSK Optical Fibre Transmission Systems: S...

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IEEE Region 10 International Conference TENCON

作者： T.l. Huynh L.n. Binh D.d. Tran Q.h. Lam Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia Network Technology Research Centre Nanyang Technological University Singapore

We present the MatlabTM Simulink model and its corroboration with experimental transmission of amplitude and differential phase modulation incorporating RZ, NRZ, carrier suppressed RZ formats over 320 km long-haul optical fibre transmission systems. Dispersion tolerance of the transmission systems under non-compensation and compensated transmission fibres is given. Simulated and measured eye diagrams are reported.

关键词： Amplitude shift keying Differential quadrature phase shift keying Optical fibers System testing Mathematical model computer languages Phase modulation Optical signal processing Optical fiber dispersion Optical fiber testing

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Achieving fast fault detection and localization in all-optical networks

Achieving fast fault detection and localization in all-optic...

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National Fiber Optic Engineers Conference, NFOEC 2005

作者： Zeng, Hongqing Huang, Changcheng Vukovic, Alex Michel Savoie, J. Advanced Optical Network Laboratory Department of Systems and Computer Engineering Carleton University 1125 Colonel By Drive Ottawa ON K1S 5B6 Canada Communications Research Centre Canada 3701 Carling Avenue Ottawa ON K2H 8S2 United States

Fault detection and localization is critical for all-optical networks. In this paper after a review of the history and recent advancement on this topic, we proposed an end-to-end fault detection mechanism based on mon... 详细信息

ISBN: (纸本)1557527849

关键词： Fault detection

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Transport performance of an all-optical metro WDM network based on dynamic all-optical switches

Transport performance of an all-optical metro WDM network ba...

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National Fiber Optic Engineers Conference, NFOEC 2005

Transport performance is studied to assess the feasibility of four research facilities connected within metro WDM network. In particular, the dynamic wavelength switching is evaluated by tracking key network performan... 详细信息

ISBN: (纸本)1557527849

关键词： Optical switches

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The threshold hop-limit effect in p-cycles: Comparing hop- and circumference-limited design

The threshold hop-limit effect in p-cycles: Comparing hop- a...

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作者： Kodian, Adil Sack, Anthony Grover, Wayne D. TRLabs. Department of Electrical and Computer Engineering University of Alberta Canada TELUS Corporation 18 10020-100 St NW Edmonton Alta. Canada TRLabs. University of Alberta Network Systems 9107-116 St. ECERF Edmonton Alta. T6G2V4 Canada

p-cycles offer an approach to protection of optical transport networks which is fully pre-connected and as fast as a ring-based protection but with mesh-like capacity efficiency. As a result, p-cycles are receiving much study and attention. One open question is, however, whether p-cycle network design exhibits a "threshold hop-limit" effect corresponding to that aspect of span-restorable mesh networks. To study this question we extend the existing p-cycle network design theory to include the capability of direct restriction of protection path lengths, rather than indirect restriction through cycle circumference limits. A second practical question is how well simple limitation of cycle circumferences serves as a surrogate for a more involved design method of directly asserting a hop (or distance) limit on the maximum length of protection paths. The answers to these questions, and the methods developed to address them, both enhance our ability to design p-cycle networks in which limitations to optically transparent reach (or other hop or distance limitations) can be directly taken into account. The main findings are that p-cycles do exhibit threshold hop-limiting effects at about three or four hops above those in corresponding mesh networks and that cycle limiting is a simple and effective surrogate for direct limitation on path lengths in p-cycle design problems. © 2005 Elsevier B.V. All rights reserved.

关键词： network protocols

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Short-term traffic prediction using fuzzy c-means and cellular automata in a wide-area road network

Short-term traffic prediction using fuzzy c-means and cellul...

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International Conference on Intelligent Transportation

作者： H. Kanoh T. Furukawa S. Tsukahara K. Hara H. Nishi H. Kurokawa Department of Computer Science Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki Japan Graduate School of Sciences and Engineering University of Tsukuba Japan College of Information Sciences University of Tsukuba Japan Corporate Network Development Division Matsushita Elecrric Indusrrial Company Limited Japan

In this paper, we propose a short-term prediction method for forecasting traffic in a time-series manner for up to one hour ahead for all roads in a wide-area road network. The results of our research enable traffic to be simulated for a wide-area road network based on actual traffic data by combining fuzzy clustering and cellular automata. On application to an actual road network with 3,405 links, the proposed technique was found to be superior to the nearest neighborhood method for traffic prediction at times of congestion outbreak and alleviation and heavy congestion.

关键词： Telecommunication traffic Intelligent networks Traffic control Roads Predictive models Prediction methods Navigation Computational modeling computer networks Distributed computing

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Enabling collaborative adaptation across legacy components

Enabling collaborative adaptation across legacy components

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3rd Workshop on Adaptive and Reflective Middleware, ARM '04

作者： Yang, Z. Zhou, Z. Cheng, B.H.C. McKinley, P.K. Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI 48824 United States

ISBN: (纸本)1581139497

Software frequently needs to adapt its behavior at run time to respond to changes in its execution environment. Different software components may use different approaches to adaptation. Composing a single adaptive system from existing adaptive components requires an "adaptation infrastructure" to integrate and arbitrate adaptive behaviors. This paper proposes a model for such an infrastructure and describes the design and operation of M2, a prototype implementation. M2 uses a technique called transparent shaping to modify existing components so that they can report events of interest to the M2 core and implement appropriate responses. The architecture and communication infrastructure of M2 are described, followed by a case study in which M2 is used to construct an adaptive multimedia conferencing application from otherwise incompatible components. Copyright 2004 ACM.

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Transformations for write-all-with-collision model

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7th International Conference on Principles of Distributed systems, OPODIS 2003

作者： Kulkarni, Sandeep S. Arumugam, Mahesh Umamaheswaran Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East LansingMI48824 United States

ISBN: (纸本)3540226672

In this paper, we consider a new atomicity model, write all with collision (WAC), and compare it with existing models considered in the literature. This model captures the computations in sensor networks. We show that it is possible to transform a program from WAC model into a program in read/write model, and vice versa. Further, we show that the transformation from WAC model to read/write model is stabilization preserving, and the transformation from read/write model to WAC model is stabilization preserving for timed systems. In the transformation from read/write model to WAC model, if the system is untimed (asynchronous) and processes are deterministic then under reasonable assumptions, we show that (1) the resulting program in WAC model can allow at most one process to execute, and (2) the resulting program in WAC model cannot be stabilizing. In other words, if a deterministic program cannot read then it is important that it can tell time. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Stabilization

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