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作者： Beldek, Ulas Leblebicioglu, Kemal Department of Electronic and Communications Engineering ÇAnkaya University Ankara Turkey Electrical and Electronic Engineering Department METU Ankara Turkey Computer Vision and Intelligent Systems Research Lab. METU Ankara Turkey

ISBN: (纸本)008045108X

in particle navigation problem strategy development is crucial. The difficulties encountered by the particles during their navigation tasks require different approaches in problem solving. One way to overcome the difficulties is to divide the problem into simple modules and develop solutions for these modules separately. Basically, two different modules are sufficient in addition to the main body to develop a successful solver. The first module (conflict module), which is developed by genetic programming, is used when the particles are in conflict. The second module (memory module) helps the particles to escape from local regions. Copyright © 2005 IFAC.

关键词： Genetic algorithms

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Dark address event representation imager

Dark address event representation imager

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2005 IEEE International 48th Midwest Symposium on Circuits and systems, MWSCAS 2005

作者： Haas, Alfred M. Williams, Sam L. Cohen, Marc H. Abshire, Pamela A. University of Maryland College Park Department of Electrical and Computer Engineering College Park United States Institute for Systems Research IBIS Lab. College Park United States

ISBN: (纸本)0780391977

A hybrid dark-active address-event representation (AER) imager has been designed, simulated and laid out in a commercially available 0.5 um CMOS process. The imager comprises a 16×16 array of tunable active pixels each of which is approximately 33 × 30 μm2 in area, with a 19% fill factor. It operates both in (1) an imaging mode;and (2) a "dark" AER mode wherein the individual pixels asynchronously generate voltage pulses, or spikes, when the incident light on a pixel falls below a user defined threshold. In the dark AER mode, individual pixels sense whether they are occluded (dark), or not, by integrating the difference between the photocurrent and a tunable bias current onto the photodiode junction capacitance. Charge accumulates on an occluded photodiode because the photocurrent is smaller than the bias current. The capacitor voltage is then buffered by a source follower and, for a dark photodiode, increases until it crosses the threshold of a CMOS inverter, whereupon it is converted into a logic "high" event. As these dark digital events arise, their row and column addresses are priority encoded in real-time and then multiplexed together for serial readout. Simulations indicate that events are reliably generated at 1 ms and that data readout rates can operate efficiently several orders of magnitude faster. © 2005 IEEE.

关键词： Image sensors

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Object-oriented development for DoDAF system of systems

Object-oriented development for DoDAF system of systems

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15th Annual International Symposium of the International Council on systems engineering, INCOSE 2005

作者： Stanilka, Stanley P. Dagli, Cihan H. Miller, Ann The Boeing Company Integrated Defense Systems P.O. Box 16858 Philadelphia PA 19142-0858 United States University of Missouri-Rolla Distinguished Professor of Engineering Mgmt The Smart Engineering Systems Lab 1870 Miner Circle Rolla MO 65409-0370 United States University of Missouri-Rolla Distinguished Professor of Computer Engineering 125 Emerson Electric Co. Hall Rolla MO 65409-0040 United States

ISBN: (纸本)9781622769285

The Department of Defense Architecture Framework (DoDAF) provides architectural artifact examples for modeling complex system of systems within the information-centric and hardware-centric global battlespace theater. This framework is utilized by all U.S. government agencies and military branches that procure military hardware and plan for tomorrow's strategic evolution in the armed forces. This framework must be adopted by those business organizations who wish to market their products to the U.S. military. The models mandated by the DoDAF do not always align with the software development methods and production processes utilized in the commercial enterprises who position their products for acquisition into the network centric military markets. This is especially true for software industries where object oriented analysis and design methods have become entrenched as an industry standard. This paper analyzes object oriented development of complex systems and compares the artifacts produced through this method with artifacts produced through the structured architecture techniques described by the DoDAF. The comparison provides an evaluation of the commonality and gaps between both ideologies. © 2005 by Stanley P. Stanilka.

关键词： System of systems

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A realistic timing test model and its applications in high-speed interconnect devices

A realistic timing test model and its applications in high-s...

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作者： Wang, Baosheng Kuo, Andy Farahmand, Touraj Ivanov, André Cho, Yong B. Tabatabaei, Sassan SoC Laboratory University of British Columbia Canada Department of Electronics Engineering Konkuk University Seoul Korea Republic of Guide Technology Inc. Sunnyvale CA United States ATI Technologies Inc. Markham Ont. Canada Research Lab. Department of Electrical and Computer Engineering University of British Columbia Department of Electrical and Computer Engineering University of British Columbia IEEE Computer Society IEEE British Columbia Advanced Systems Institute Virage Logic Corporation

This paper extends the timing test model in [5] to be more realistic by including the effects of the test fixtures between a device under test and a tester. The paper enables analyzing the trade-offs that arise between the predicted yield and the required overall test environment timing accuracy (OTETA) which involves the tester overall timing accuracy (OTA) and the test fixtures' impacts. We specifically focus on the application of the extended model to predict the test yield of standard high-speed interconnects, such as PCI Express, Parallel/Serial RapidIO, and HyperTransport. The extended model reveals that achieving an actual yield of 80% with a test escape of 300 DPM (Defects Per Million) requires an equivalent OTETA that is about half the acceptable absolute limit of the tested parameter. © 2005 Springer Science + Business Media, Inc.

关键词： Scheduling

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STRATEGY CREATION, DECOMPOSITION AND DISTRIBUTION IN PARTICLE NAVIGATION: MEMORY MODULE

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IFAC Proceedings Volumes 2005年第1期38卷 46-51页

作者： Ulaş Beldek Kemal Leblebicioĝlu Department of Electronic and Communications Engineering Çankaya University Ankara Turkey Computer Vision and Intelligent Systems Research Lab METU Ankara Turkey Electrical and Electronic Engineering Department METU Ankara Turkey

In particle navigation problem strategy development is crucial. The difficulties encountered by the particles during their navigation tasks require different approaches in problem solving. One way to overcome the difficulties is to divide the problem into simple modules and develop solutions for these modules separately. Basically, two different modules are sufficient in addition to the main body to develop a successful solver. The first module (conflict module), which is developed by genetic programming, is used when the particles are in conflict. The second module (memory module) helps the particles to escape from local regions.

关键词： Genetic Algorithms Agents Optimization Path Planning Robot Navigation Rule-Based systems

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ONE-TO-ONE TECHNOLOGY-ENHANCED LEARNING: AN OPPORTUNITY FOR GLOBAL research COLlabORATION

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research and Practice in Technology Enhanced Learning 2006年第1期1卷 3-29页

作者： TAK-WAI CHAN JEREMY ROSCHELLE SHERRY HSI KINSHUK MIKE SHARPLES TOM BROWN CHARLES PATTON JOHN CHERNIAVSKY ROY PEA CATHIE NORRIS ELLIOT SOLOWAY NICOLAS BALACHEFF MARLENE SCARDAMALIA PIERRE DILLENBOURG CHEE-KIT LOOI MARCELO MILRAD ULRICH HOPPE Research Center for Science and Technology for Learning National Central University 300 Jhongda Road Jhongli City 32001 Taiwan ROC Center for Technology in Learning SRI International 333 Ravenswood Ave BN-376 Menlo Park California 94025 USA Center for Learning and Teaching The Exploratorium 3601 Lyon Street San Francisco California 94123 USA Advanced Learning Technologies Research Centre Massey University Private Bag 11-222 Palmerston North New Zealand Learning Sciences Research Institute Nottingham University Jubilee Campus Wollaton Road Nottingham NG8 1BB UK University of Pretoria Telematic Learning & Education Innovation Lynnwood Road Hillcrest Pretoria South Africa 0002 South Africa National Science Foundation 4201 Wilson Boulevard Arlington Virginia 22230 USA Stanford Center for Innovations in Learning Stanford University Wallenberg Hall Building 160 450 Serra Mall Stanford CA 94305-205 USA Department of Cognition and Technology University of North Texas Matthews Hall 316-D PO Box 311337 Denton TX 76203-1337 USA Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109 USA Laboratoire Leibniz 46 Avenue Félix Viallet 38031 Grenoble Cedex France Institute for Knowledge Innovation and Technology OISE/University of Toronto 252 Bloor Street West Toronto Ontario M5S 1V6 Canada Swiss Federal Institute of Technology Ecole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland Learning Sciences Lab National Institute of Education Nanyang Technological University 1 Nanyang Walk Singapore 637616 Singapore Center for Learning and Knowledge Technologies Växjö University MSI Växjö University Vejdes plats 6 och 7 351 95 Växjö Sweden Institute for Computer Science and Interactive Systems University Duisburg-Essen Building LF Lotharstr. 63/65 47048 Duisburg Germany

Over the next 10 years, we anticipate that personal, portable, wirelessly-networked technologies will become ubiquitous in the lives of learners — indeed, in many countries, this is already a reality. We see that ready-to-hand access creates the potential for a new phase in the evolution of technology-enhanced learning (TEL), characterized by "seamless learning spaces" and marked by continuity of the learning experience across different scenarios (or environments), and emerging from the availability of one device or more per student ("one-to-one"). One-to-one TEL has the potential to "cross the chasm" from early adopters conducting isolated design studies to adoption-based research and widespread implementation, with the help of research and evaluation that gives attention to the digital divide and other potentially negative consequences of pervasive computing. We describe technology-enhanced learning and the affordances of one-to-one computing and outline a research agenda, including the risks and challenges of reaching scale. We reflect upon how this compares with prior patterns of technology innovation and diffusion. We also introduce a community, called "G1:1," that brings together leaders of major research laboratories and one-to-one TEL projects. We share a vision of global research, inviting other research groups to collaborate in ongoing activities.

关键词： Technology-enhanced learning research collaboration pervasive computing wireless technologies

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Conservation of filtering in manufacturing systems

Conservation of filtering in manufacturing systems

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作者： Li, Jingshan Enginarlar, Emre Meerkov, Semyon M. Manufacturing Systems Research Lab General Motors Research and Development Center Warren MI 48090-9055 United States Decision Applications Division Los Alamos National Laboratory Los Alamos NM 87545 United States Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109-2122 United States

ISBN: (纸本)008045108X

This paper addresses the issue of reliable satisfaction of customer demand by unreliable production systems. Using a simple Production-Storage-Customer model, we show that this can be accomplished by filtering out production randomness. The filtering of randomness is ensured by finished goods buffers (filtering in space) and shipping periods (filtering in time). The following question is considered: How are filtering in space and in time interrelated? As an answer, we show that there exists a conservation law: in lean manufacturing systems, the amount of filtering in space multiplied by the amount of filtering in time (both measured in appropriate dimensionless units) is practically constant. Copyright © 2005 IFAC.

关键词： Manufacture

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On-chip 2-axis optical fiber actuator using gray-scale technology

On-chip 2-axis optical fiber actuator using gray-scale techn...

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International Symposium Semiconductor Device research (ISDRS)

作者： B. Morgan R. Ghodssi MEMS Sensors and Actuators Lab (MSAL) Department of Electrical and Computer Engineering Institute for Systems Research University of Maryland College Park MD USA

We report an on-chip method for actuating an optical fiber in 2-axes. Opposing comb-drive actuators with integrated 3-D wedges (fabricated using gray-scale technology (Morgan, 2004)) create a translatable, variable height v-groove to alter the horizontal and vertical alignment of an optical fiber cantilever. Actuation of a cleaved fiber tip over a diamond shaped area >35mum in each direction is demonstrated. The design, fabrication, and testing results presented here clearly demonstrate this actuator's ability to precisely control the position of an optical fiber in 2-axes, an essential capability for on-chip fiber alignment mechanisms in optoelectronic packaging

关键词： Optical fibers Actuators Gray-scale Optical fiber devices Voltage Silicon Optical fiber testing System-on-a-chip Micromechanical devices Packaging

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In-Plane Indium Phosphide Tunable Optical Filter Using Ridge Waveguides

In-Plane Indium Phosphide Tunable Optical Filter Using Ridge...

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International Symposium Semiconductor Device research (ISDRS)

作者： J. McGee N. Siwak B. Morgan R. Ghodssi MEMS Sensors and Actuators Lab (MSAL) Department of Electrical and Computer Engineering Institute for Systems Research University of Maryland College Park MD USA

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CONSERVATION OF FILTERING IN MANUFACTURING systems

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IFAC Proceedings Volumes 2005年第1期38卷 165-170页

作者： Jingshan Li Emre Enginarlar Semyon M. Meerkov Manufacturing Systems Research Lab General Motors Research & Development Center Warren MI 48090-9055 Decision Applications Division Los Alamos National Laboratory Los Alamos NM 87545 Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109-2122

This paper addresses the issue of reliable satisfaction of customer demand by unreliable production systems. Using a simple Production-Storage-Customer model, we show that this can be accomplished by filtering out production randomness. The filtering of randomness is ensured by finished goods buffers (filtering in space) and shipping periods (filtering in time). The following question is considered: How are filtering in space and in time interrelated? As an answer, we show that there exists a conservation law: In lean manufacturing systems, the amount of filtering in space multiplied by the amount of filtering in time (both measured in appropriate dimensionless units) is practically constant.

关键词： Manufacturing systems Filtering Conservation law

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