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2008 IEEE International Conference on Sustainable Energy Technologies, ICSET 2008

作者： Pina, André Ioakimidis, Christos S. Ferrão, Paulo Sustainable Energy Systems within the MIT Portugal Program and the Centre for Innovation Technology and Policy Research at Instituto Superior Técnico Technical University of Lisbon Portugal Department of Mechanical Engineering at Instituto Superior Técnico Technical University of Lisbon with the Centre for Innovation Technology and Policy Research Av. Rovisco Pais 1049-001 Lisboa Portugal Centre for Innovation Department of Mechanical Engineering at Instituto Superior Técnico Technical University of Lisbon Portugal

ISBN: (纸本)9781424418886

The energy situation in remote islands is becoming critical with high fuel import costs preventing the islands from developing at a faster pace. São Miguel is an island located in the middle of the Atlantic with extensive renewable resources whose utilization is limited by low base load levels and lack of storage facilities. Using an economic optimization model, this work suggests using a seawater pumped-storage system to increase the penetration of renewable energy in the system. Several scenarios are analyzed and compare to determine the sensitivity of the solution and determine if it is a good option. © 2008 IEEE.

关键词： Seawater

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Security Processor with Quantum Key Distribution

Security Processor with Quantum Key Distribution

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International Conference on Application Specific systems (ASAP), Architectures and Processors

作者： Thomas Lorunser Edwin Querasser Thomas Matyus Momtchil Peev Johannes Wolkerstorfer Michael Hutter Alexander Szekely Ilse Wimberger Christian Pfaffel-Janser Andreas Neppach Smart Systems Division Austrian Research Centers GmbH Vienna Austria Graz University of Technology Graz Austria Program and System Engineering (PSE) Siemens AG Vienna Austria

We present a fully operable security gateway prototype, integrating quantum key distribution and realised as a system-on-chip. It is implemented on a field-programmable gate array and provides a virtual private network with low latency and gigabit throughput. The seamless hard- and software integration of a quantum key distribution layer enables high key-update rates for the encryption modules. Hence, the amount of data encrypted with one session key can be significantly decreased. We realise a highly modular architecture and make extensive use of software/hardware partitioning. This work is the first approach towards application of a new key distribution technology in dedicated security processors. In particular, it elaborates requirements for the integration of quantum key distribution on a chip level.

关键词： Cryptography Hardware Software Protocols Data acquisition Security Photonics

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A systematic proteome-based approach for high-level extracellular production of recombinant proteins in Escherichia coli

A systematic proteome-based approach for high-level extracel...

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13th International Biotechnology Symposium and Exhibition(第13届IUPAC国际生物工程会议)

作者： Zhi-Gang Qian Xiao-Xia Xia Jong Hyun Choi Sang Yup Lee Department of Bio and Brain Engineering and Bioinformatics Research Center KAIST Daejeon Republic of Korea Metabolic and Biomolecular Engineering National Research Labora tory Department of Chemical and Biomolecular Engineering (BK21 Program) and BioProcess Engineering Research Center Center for Systems and Synthetic Biotechnology and Institute for the BioCenturyKAIST 335 Gwahangno Yuseong-gu Daejeon 305-701 Republic of Korea Metabolic and Biomolecular Engineering National Research Labora tory Department of Chemical and Biomolecular Engineering (BK21 Program) and BioProcess Engineering Research Center Center for Systems and Synthetic Biotechnology and Institute for the BioCenturyKAIST 335 Gwahangno Yuseong-gu Daejeon 305-701 Republic of Korea

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Ornithopter modeling for flight simulation

Ornithopter modeling for flight simulation

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International Conference on Control, Automation and systems ( ICCAS)

作者： Jae-Hung Han Jin-Young Lee Dae-Kwan Kim Department of AeroSpace Engineering School of Mechanical AeroSpace and System Engineering KAIST Daejeon South Korea COMS Systems Department Communication Ocean & Meteorological Satellite Program Office Korea Aerospace Research Institute Daejeon South Korea

This paper presents the flight simulation of flapping-wing air vehicles (ornithopters) based on a refined flapping-wing aerodynamic model; the modified strip theory (MST). Compared with conventional types of micro air vehicles (MAVs), flapping MAVs show more complicated flight behaviors due to their complex wing motions and aerodynamics. In this paper, a flight dynamic model of an ornithopter is presented to analyze its stability and controllability. This paper focuses on the stabilization and path-following control of the ornithopter by adjusting the flapping frequency and tail-wingpsilas elevation angle. In spite of its nonlinear and complex behavior, controlling the tail-wing pitch angle can be effective for the stabilization in longitudinal motion of the ornithopter.

关键词： Aerospace simulation Aerodynamics Vehicle dynamics Unmanned aerial vehicles Force control Strips Control system synthesis Aerospace engineering Electronic mail Frequency

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Autonomous ballistic missile inertial guidance, a new paradigm for the 21st century

Autonomous ballistic missile inertial guidance, a new paradi...

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作者： Fall, Robert H. Dipipi, Marc L. Slivinsky, Sandra Paul, Chris Honeywell International Clearwater FL 33764-7290 United States Air Force Space and Missile Systems Center Los Angeles AFB CA 90245-28089 United States Air Force Research Laboratory Space Vehicles Directorate Kirtland AFB NM 87117-5776 United States Inertial Systems Guidance and Navigation Center of Excellence 13350 US Highway 19 N. Clearwater FL 33764-7290/3-560 United States AIMU Program Electronic Systems Engineering Applications 13350 US Highway 19 N. Clearwater FL 33764-7290/3-216 United States Air Force Space and Missile Systems Center SMC/HRG 483 N. Aviation Blvd Los Angeles AFB El Segundo CA 90245-28089 United States AFRL/RVSV 3550 Aberdeen Avenue SE Kirtland AFB NM 87117-5776 United States

ISBN: (纸本)9781563479458

This top level paper describes the development approach, the system design and the proof-of-concept engineering model that has resulted from over five years of research and development efforts. The system concept meets the USAF's prioritized needs of low lifecycle cost, better autonomous guidance accuracy than currently available and significant operational flexibility. Assisted by the utilization of solid-state sensors, the design eliminates wear-out mechanisms and has a projected system mean time between failures of over twenty years of continuous operation while meeting stringent accuracy requirements. An all attitude sensor sphere with a wireless power feed and wireless data communications provides a protective environment for Honeywell high-precision, radiation-hard Strategic Resonating Beam Accelerometers and Strategic Fiber-Optic Gyroscopes, both of which are currently under sponsored development. The implementation of a strapped down guidance algorithm applied to a continuously self-calibrating system alo contributes to a novel system approach that uses the synergy between all of these elements to achieve the desired low acquisition and operational cost while achieving high accuracy, autonomous guidance capability over a variety of current and future missions. © 2008 by Honeywell International Inc.

关键词： Gyroscopes

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The Third International Conference on human-robot interaction

The Third International Conference on human-robot interactio...

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作者： Fong, Terry Dautenhahn, Kerstin Scheutz, Matthias Demiris, Yiannis Intelligent Robotics Group NASA Ames Research Center Department of Artificial Intelligence School of Computer Science University of Herfordshire Herfordshire United Kingdom Adaptive Systems Research Group University of Herfordshire Herfordshire United Kingdom Department of Cognitive Science Computer Science and Informatics Cognitive Science Program Indiana University Bloomington IN United States Intelligent Robotics Team Department of Electrical Engineering Imperial College London London United Kingdom

The third international conference on Human-Robot Interaction (HRI-2008) was held in Amsterdam, The Netherlands, March 12-15, 2008. The theme of HRI-2008, "living with robots," highlights the importance of the technical and social issues underlying human-robot interaction with companion and assistive robots for long-term use in everyday life and work activities. More than 250 researchers, practitioners, and exhibitors attended the conference, and many more contributed to the conference as authors or reviewers. HRI-2009 will be held in San Diego, California, from March 11-13, 2009. Copyright © 2008, Association for the Advancement of Artificial Intelligence. All rights reserved.

关键词： Human robot interaction

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Aeroacoustic noise survey on supersonic transport airframe in large-scale aerodynamic low-speed wind tunnel

Aeroacoustic noise survey on supersonic transport airframe i...

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作者： Ito, Takeshi Ura, Hiroki Kajitani, Ken Tanaka, Hiroyuki Igo, Kenichi Wind Tunnel Technology Center Institute of Aerospace Technology JAXA Chofu Tokyo 182-8522 Japan Boeing Commercial Airplane Group Boeing Company Seattle WA 98124-2207 United States Engineering Research Department Nagoya Aerospace Systems Mitsubishi Heavy Industries Ltd. Nagoya 455-8515 Japan High Speed Transport Program Group Japan Aircraft Development Corporation Tokyo 100-0011 Japan

ISBN: (纸本)9781563479373

To obtain aeroacoustic noise data and aerodynamic characteristics of airframe, SST configuration model was tested in closed test section of large-scale aerodynamic low-speed wind tunnel in JAXA. Size of the test section was 6.5m × 5.5m, and phased-array microphones were placed on upper wall of the closed test section. Noise source survey had been successfully conducted, and characteristics of typical noise sources on the airframe were visualized, such as noise from kink of double-delta wing, wing tip, landing gear, chine, and so on. Moreover, effects of the configuration and angle of attack and its frequency dependency were analyzed by comparing relative sound pressure level of maximum noise, and each element of noise sources was also investigated. In this testing, in large angle of attack, Cruise configuration showed noise in all frequency, and Landing (flap-down) configuration showed stronger noise in low frequency only. Gear configuration showed strong noise in low frequency in all angle of attack. In detailed analysis of noise source elements, in 4-10 kHz, dominant noise in large angle of attack in Cruise configuration was kink of main wing, and gear noise was remarkable at low angle of attack in Gear configuration. Wing tip noise also became large at medium angle of attack in Landing configuration. At 16 kHz, the kink noise was still strong, but gear noise was not visible very much. Mechanism of noise occurrence was also discussed using these characteristics. Copyright © 2008 by T. Ito.

关键词： Angle of attack

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Chirality tunneling and quantum dynamics for domain walls in mesoscopic ferromagnets

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Physical Review B 2008年第13期77卷 134425-134425页

作者： E. G. Galkina B. A. Ivanov Sergey Savel’ev Franco Nori Frontier Research System The Institute of Physical and Chemical Research (RIKEN) Wako-shi Saitama 351-0198 Japan Institute of Physics 03028 Kiev Ukraine Institute of Magnetism 03142 Kiev Ukraine Department of Physics Loughborough University Leicestershire LE11 3TU United Kingdom Department of Physics Center for Theoretical Physics Applied Physics Program Center for the Study of Complex Systems University of Michigan Ann Arbor Michigan 48109-1040 USA

We studied the quantum dynamics of ferromagnetic domain walls (topological kink-type solitons) in one-dimensional ferromagnetic spin chains. We show that the tunneling probability does not depend on the number of spins in a domain wall; thus, this probability can be large even for a domain wall containing a large number of spins. We also predict that there is a strong interplay between the tunneling of a wall from one lattice site to another (tunneling of the kink coordinate) and the tunneling of the kink topological charge (so-called chirality). Both of these elementary processes are suppressed for kinks in one-dimensional ferromagnets with half-integer spin. The dispersion law (i.e., the domain wall energy versus momentum) is essentially different for chains with either integer or half-integer spins. The predicted quantum effects could be observed for mesoscopic magnetic structures, e.g., chains of magnetic clusters, large-spin molecules, or nanosize magnetic dots.

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DLM: A distributed Large Memory System using remote memory swapping over cluster nodes

DLM: A distributed Large Memory System using remote memory s...

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IEEE International Conference on Cluster Computing

作者： Hiroko Midorikawa Motoyoshi Kurokawa Ryutaro Himeno Mitsuhisa Sato Department of Computer and Information Science Seikei University Musashino Tokyo Japan Graduate School of Systems and Information Engineering University of Tsukuba Tennodai Tsukuba Ibaraki Japan Advanced Center of Computing and Communication Wako Saitama Japan Research Program for Computational Science RIKEN Wako Saitama Japan

Emerging 64 bitOSpsilas supply a huge amount of memory address space that is essential for new applications using very large data. It is expected that the memory in connected nodes can be used to store swapped pages efficiently, especially in a dedicated cluster which has a high-speed network such as 10 GbE and Infiniband. In this paper, we propose the distributed large memory system (DLM), which provides very large virtual memory by using remote memory distributed over the nodes in a cluster. The performance of DLM programs using remote memory is compared to ordinary programs using local memory. The results of STREAM, NPB and Himeno benchmarks show that the DLM achieves better performance than other remote paging schemes using a block swap device to access remote memory. In addition to performance, DLM offers the advantages of easy availability and high portability, because it is a user-level software without the need for special hardware. To obtain high performance, the DLM can tune its parameters independently from kernel swap parameters. We also found that DLMpsilas independence of kernel swapping provides more stable behavior.

关键词： Kernel Arrays Memory management Servers Bandwidth Performance evaluation Benchmark testing

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Variable structure control for set-point stabilization OF 2-DOF underactuated manipulators

Variable structure control for set-point stabilization OF 2-...

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IEEE SSD International Multi-Conference on systems, Signals and Devices

作者： S. Mahjoub F. Mnif N. Derbel Research unit on Intelligent Control Design &Optimization of complex Systems (ICOS) École Nationale d''lngenieurs de Sfax Sfax Tunisia Department of Electrical and Computer Engineering Sultan Qaboos University Muscat Oman Res. unit on Intell. Control Ecole Nat. d'Ing. de Sfax Sfax

Controlling an underactuated manipulator with less actuators than degree of freedom is a challenging problem, specifically when it is to force the underactuated manipulator to track a given trajectory or to be configurated at a specific position in the work space. This paper presents a cascade sliding mode tracking controller for set-point regulation of 2-DOF underactuated manipulators. This work builds on an observation that an underactuated manipulator can be treated as two subsystems. Consequently, a cascade sliding mode tracking controller can be designed as follows. First, a sliding mode surface is designed for both subsystems, this two sliding surfaces represent a first layer in the design architecture. A second layer sliding mode surface is then constructed based on the first layer sliding surface. The cascaded sliding mode controller is therefor deduced in terms of Lyapunov stability theorem. Robustness issues to bounded disturbances are then investigated. Simulation results on 2-DOF whiling pendulum are presented to demonstrate the effectiveness of the approach.

关键词： Control systems Manipulators Lyapunov method Joints Evolution (biology) Robustness Mechanical systems

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