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International Symposium on Micromechatronics and Human Science (MHS)

作者： Yoichi Tagaya Yasunaga Mitsuya Hedong Zhang Kenji Fukuzawa Department of Mechanical Science and Engineering University of Nagoya Nagoya Aichi Japan Nagoya Industrial Science Research Institute Nagoya Aichi Japan Department of Complex Systems Science University of Nagoya Nagoya Aichi Japan JST-PRESTO Kawaguchi Saitama Japan Department of Micro-/Nano-Systems Engineering University of Nagoya Nagoya Aichi Japan

Coarse-grained molecular dynamics (MD) simulations were applied to reproduce the surface morphology of lubricant films composed of perfluoropolyether (PFPE) Zdol and tri-functional PFPE, which has a functional group at the middle of a molecule as well as functional endgroups at the head and tail of the molecule. The molecular-mesh scanning method was introduced to detect the location of film surface. The effects of the number of polar groups and polymer length on a flat solid surface were studied as lubricant films with periodic boundary conditions. We clarified that the film surface of the tri-functional PFPE lubricant was smoother than Zdol 2000 when compared at the same film thickness condition.

关键词： Magnetic properties Magnetic films Surface morphology Lubricants Polymer films Magnetosphere Magnetic heads Tail Solids Boundary conditions

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11.1.3 ‘Tour d'horizon’ in Requirements engineering - Areas left for exploration

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INCOSE International Symposium 2007年第1期17卷 1737-1757页

作者： Kossmann, Mario Odeh, Mohammed Gillies, Andrew Ingamells, Colin AIRBUS UK University of the West of England United Kingdom Software Engineering Research Group Centre for Complex and Cooperative Systems University of the West of England United Kingdom University of the West of England United Kingdom

The present paper aims to give an overview of the state-of-the-art in Requirements engineering (RE) based on a wide collection of publications from recent years, and focuses specifically on some advanced areas that need to be further explored in the future. Those areas addressed here are the use of ontologies and UML in RE, the coverage of non-functional requirements, interfaces to other engineering disciplines and other functions, as well as RE in the context of corporate wide improvement initiatives such as CMMI and Lean Enterprise Value. © 2007 The Authors.

关键词： Requirements engineering

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A systems View of a Neuromorphic VLSI Echolocation System

A Systems View of a Neuromorphic VLSI Echolocation System

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Timothy K. Horiuchi Matthew Cheely Electrical and Computer Engineering Department Institute for Systems Research Neuroscience and Cognitive Science Program University of Maryland College park MD USA Neuroscience and Cognitive Science Program University of Maryland College park MD USA

Echolocating bats have long demonstrated the potential for air-coupled sonar to guide agile navigation through complex 3D environments. While air-coupled sonar has been extensively used in mobile ground robotics and a considerable amount of the bat's auditory system has been studied, little work has been done to understand how the neural circuitry of the bat can integrate echoes into a coherent, behaving system. This paper addresses the unique characteristics of bat echolocation and how they impact the design of a neuromorphic VLSI-based echolocation system. By constructing a system to solve bat-specific sensorimotor tasks the authors have encountered a number of interesting issues and questions that commonly face neuromorphic VLSI designers. Successes, problematic issues, and future directions are discussed

关键词： Neuromorphics Very large scale integration Auditory system Neurons Sonar navigation Mobile robots Frequency Delay estimation Neuroscience Cognitive science

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The acquisition of joint programs: The implications of interdependencies

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CrossTalk 2007年第5期20卷 20-24页

作者： Brown, Mary Maureen Flowe, Robert M. Hamel, Sean Patrick University of North Carolina Chapel Hill Office of the Secretary of Defense Software Engineering Institute SEI/University of North Carolina at Chapel Hill CB #3330 Knapp-Sanders BLDG Chapel Hill NC 27599-3330 Office of the Secretary of Defense Program Analysis and Evaluation Deputy for Resource Analysis Weapon Systems Cost Analysis Div. 1800 Defense Pentagon Washington DC 20301-1800 SEI Research Affiliate 2316 Chapel Hill RD Durham NC 27707

The movement toward transformation and joint capabilities has created new challenges for program acquisition efforts. The research reported in this article examines the implications of joint capabilities on acquisition. In short, the research investigates how program interdependency, size, age, and developmental status influence the occurrence of programmatic breaches. The findings provide empirical evidence that metrics that are capable of measuring interdependency may prove fruitful as an early indicator of joint program acquisition shortfalls.

关键词： Knowledge acquisition

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Detecting mode entanglement: The role of coherent states, superselection rules, and particle statistics

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Physical Review A 2007年第5期76卷 052113-052113页

作者： S. Ashhab Koji Maruyama Franco Nori Frontier Research System Institute of Physical and Chemical Research (RIKEN) Wako-shi Saitama 351-0198 Japan CREST Japan Science and Technology Agency Kawaguchi Saitama 332–0012 Japan Physics Department Michigan Center for Theoretical Physics Applied Physics Program Center for the Study of Complex Systems University of Michigan Ann Arbor Michigan 48109-1040 USA

We discuss the possibility of observing quantum nonlocality using the so-called mode entanglement, analyzing the differences between different types of particles in this context. We first discuss the role of coherent states in such experiments, and we comment on the existence of coherent states in nature. The discussion of coherent states naturally raises questions about the role of particle statistics in this problem. Although the Pauli exclusion principle precludes coherent states with a large number of fermionic particles, we find that a large number of fermionic coherent states, each containing at most one particle, can be used to achieve the same effect as a bosonic coherent state for the purposes of this problem. The discussion of superselection rules arises naturally in this context, because their applicability to a given situation prohibits the use of coherent states. This limitation particularly affects the scenario that we propose for detecting the mode entanglement of fermionic particles.

关键词： SINGLE-PHOTON INDISTINGUISHABLE PARTICLES PROBABILITY RELATIONS QUANTUM-MECHANICS SEPARATED systems NONLOCALITY

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Comments on Why Generalized BP Serves So Remarkably in 2-D Channels

Comments on Why Generalized BP Serves So Remarkably in 2-D C...

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Information Theory and Applications Workshop, ITA

作者： Ori Shental Noam Shental Shlomo Shamai Ido Kanter Anthony J. Weiss Yair Weiss Center for Magnetic Recording Research University of California San Diego USA Physics of Complex Systems Weizmann Institute of Science Israel Electrical Engineering Technion Israel sshlomo@ee.technion.ac.il Physics Bar-Ilan University Israel Electrical Engineering-Systems Tel Aviv University Israel School of Computer Science and Engineering Hebrew University of Jerusalem Israel

Generalized belief propagation (GBP) algorithm has been shown recently to infer the a-posteriori probabilities of finite-state input two-dimensional (2D) Gaussian channels with memory in a practically accurate manner, thus enabling near-optimal estimation of the transmitted symbols and the Shannon-theoretic information rates. In this note, a rationalization of this excellent performance of GBP is addressed.

关键词： Belief propagation Information rates Interference Two dimensional displays Probability Graphical models Nearest neighbor searches Message passing Gaussian channels AWGN

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The evaluation of a comprehensive middle school outreach program - The strategy, the results, and the challenges

The evaluation of a comprehensive middle school outreach pro...

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114th Annual ASEE Conference and Exposition, 2007

作者： McLaughlin, John Hardinge, Gail Brown, Eugene Jenne, Kirk Stiegler, Robert MacLaughlin Associates Environmental Protection Agency Health and Human Services Administration on Aging Centers for Medicare and Medicaid Services United States College of William and Mary United States Department of Education's Training and Technical Assistance Centers College of William and Mary United States Virginia Tech. United States Department of Mechanical Engineering Virginia Tech. United States Office of Naval Research United States Program Office of Naval Research United States Naval Surface Warfare Center Dahlgren Division United States USMC Targeting and Engagement Systems Office of Naval Research N-STAR United States USMC Science and Technology Programs Fleet Marine Forces Atlantic NAVSEA Combat Systems Safety and Engineering Division

A Navy funded outreach program directed at increasing the interest of middle school students in pursuing careers in science and engineering has been subjected to a comprehensive mixed mode evaluation process conducted by a professional educational program evaluator. The evaluation process and its implementation in terms of the comparison-group studies and mixed method (quantitative and qualitative) data collection methods are described as well as the logic models which underlie this process. Some results are described and the paper closes with a statement of the challenges faced by the evaluator. © American Society for engineering Education, 2007.

关键词： School buildings

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ALOS mission operation status

ALOS mission operation status

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Shinichi Suzuki Mitsuhiro Tsuchiya Satoko Miura Space Applications Program Systems Engineering office Japan Aerospace Exploration Agency Tsukuba Ibaraki Japan Earth Observation Research Center Japan Aerospace Exploration Agency Tsukuba Ibaraki Japan

Japan Aerospace Exploration Agency (JAXA) had completed its initial Calibration and Validation activities for the Advanced Land Observing Satellite (ALOS) launched on January 24th, 2006, and has been conducting routine operations since October 24th, 2006. ALOS data acquisition, processing and distribution status and also disaster monitor results are summarized.

关键词： Instruments Satellite broadcasting Remote monitoring Network servers Space missions Aerospace engineering Aerospace accidents Data acquisition Spatial resolution Space technology

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Ultrafast switching of Si inverse opal photonic band gap crystals

Ultrafast switching of Si inverse opal photonic band gap cry...

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Conference on Lasers and Electro-Optics Europe (CLEO EUROPE)

作者： Tijmen G. Euser Hong Wei Jeroen Kalkman Yunhoo Jun Albert Polman David J. Norris Willem L. Vos FOM-Institute of Atomic and Molecular Physics (AMOLF) Amsterdam Netherlands Department of Chemical Engineering & Materials Science University of Minnesota Minneapolis MN USA Complex Photonic Systems Group (COPS) MESA Research Institute University of Twente Enschede Netherlands

We present the first ultrafast optical switching of 3D photonic band gaps using Si inverse opals. Switching is achieved by homogeneously exciting free carriers by a two-photon process. We probe reflectivity over a broad frequency range, in particular the range where the photonic band gap is predicted. We observe a large frequency shift, and a fast decay time of 21 ps, which implies that switching could potentially be repeated at GHz rates, which is relevant to future switching and modulation applications. We also discuss the favorable prospects for ultrafast QED: switching spontaneous emission of light sources such as embedded quantum dots.

关键词： Photonic band gap Photonic crystals Reflectivity Frequency Light sources Physics Materials science and technology Optical control Optical pumping Optical refraction

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Switchable coupling between charge and flux qubits

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Physical Review B 2007年第2期76卷 024517-024517页

作者： Xiao-Ling He J. Q. You Yu-xi Liu L. F. Wei Franco Nori Department of Physics and Surface Physics Laboratory (National Key Laboratory) Fudan University Shanghai 200433 China Frontier Research System The Institute of Physical and Chemical Research (RIKEN) Wako-shi 351-0198 Japan Center for Theoretical Physics Physics Department Center for the Study of Complex Systems Applied Physics Program The University of Michigan Ann Arbor Michigan 48109-1040 USA

We propose a hybrid quantum circuit with both charge and flux qubits connected to a large Josephson junction that gives rise to an effective interqubit coupling controlled by the external magnetic flux. This switchable interqubit coupling can be used to transfer back and forth an arbitrary superposition state between the charge qubit and the flux qubit working at the optimal point. The proposed hybrid circuit provides a promising quantum memory because the flux qubit at the optimal point can store the tranferred quantum state for a relatively long time.

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