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2008 16th IEEE International Symposium on Electronics and the Environment, ISEE

作者： Tienhua, Wu Yenming, J.Chen Department of Management of PhD Program National Kaohsiung First University of Science and Technology Kaohsiung Taiwan Department of Logistics Management National Kaohsiung First University of Science and Technology Kaohsiung Taiwan

ISBN: (纸本)1424422728

The main obstacle to better manage existing WEEE recycling system in the developing countries is reforming the informal sector. However, due to the illegal and unlicensed nature of informal sector, no official data for e-waste disposal flow and for the scale of this sector are released now. Such a situation highlights that this sector is thus far than understood. Moreover, as a result of its negative impacts on the environment and human health in the industrializing countries, the informal sector is definitely a crucial and emerging issue, which is needed to be well understood and better governed. We attempts to apply SIR model to examine socioeconomic, political, cultural conditions as the parameters for observing population dynamics in an e-waste recycling system. Some numerical results are presented to show the dynamics of the population in both informal system and formal system. We also discuss the impacts of instruments and policies on population dynamics of WEEE recycling system.

关键词： Developing countries

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Stability of magnetized spine-sheath relativistic jets

Stability of magnetized spine-sheath relativistic jets

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2008 Workshop on Blazar Variability Across the Electromagnetic Spectrum, BLAZARS 2008

作者： Mizuno, Yosuke Hardee, Philip Nishikawa, Ken-Ichi National Space Science and Technology Center 320 Sparkman Drive HutnsvilleAL35805 United States Departmenf of Physics and Astronomy University of Alabama TuscaloosaAL35487 United States National Space Science and Technology Center HuntsvilleAL35805 United States NASA Postdoctoral Program Fellow NASA Marshall Space Flight Center Germany Department of Physics and Astronomy University of Nevada Las Vegas Las VegasNV89154 United States

A new general relativistic magnetohydrodynamics (GRMHD) code "RAISHIN" used to simulate jet generation by non-rotating and rotating black holes with a geometrically thin Keplerian disk finds that the jet forms a spine-sheath (two-component) structure in the rotating black hole case. Spine-Sheath structure and strong magnetic fields significantly modify the Kelvin-Helmholtz (KH) velocity shear driven instability. The RAISHN code has been used to study the effects of strong magnetic fields and weakly relativistic shear motion, c/2, on the KH instability associated with a relativistic jet (γ = 2.5) spine-sheath interaction. In the simulations sound speeds up to ∼ c/3 and Alfvén wave speeds up to ∼ 0.56c are considered. Numerical simulation results are compared to theoretical predictions from a new normal mode analysis of the linearized RMHD equations. Increased stability of a weakly magnetized system resulting from c/2 sheath speeds and stabilization of a strongly magnetized system resulting from c/2 sheath speeds is found. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

关键词： Black holes

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Annual business and news:: Beginning the 31st year of the Journal of Guidance, Control, and Dynamics

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JOURNAL OF GUIDANCE CONTROL AND DYNAMICS 2008年第1期31卷 1-1页

作者： Schmidt, George T. Aeronautics and Astronautics Massachusetts Institute of Technology (MIT) AIAA Institute of Electrical and Electronics Engineers Russian Federation Academy of Navigation and Motion Control Department of Mechanical and Aerospace Engineering and Engineering Mechanics University of Missouri-Rolla(UMR) Lockheed Electronics Company Center for Space Research University of Texas Austin United States Wright Laboratory Eglin Air Force Base UMR AIAA Guidance Navigation and Control Technical Committee American Automatic Control Council Lockheed Martin Aeronautics Company Palmdale CA United States C4ISR and Unmanned Air Vehicle (UAV) Programs for Air Vehicle Sciences and Systems Accreditation Board Engineering and Technology Inc./Aeronautical National Technical Committee on Guidance Navigation and Control Department of Mechanical and Aerospace Engineering University at Buffalo State University of New York (SUNY) AIAA Technical Committee on GN and C Air Vehicles Directorate Air Force Research Laboratory (AFRL) Wright-Patterson Air Force Base Space Access and Hypersonic Vehicle Guidance and Control Group Control Science Center of Excellence AFRL AIAA Technical Committee on Guidance Navigation and Control Department of Mechanical and Aeronautical Engineering University of California (UC) Davis United States Boeing Company Modernized Flight Control System for the Apache Longbow AIAA Institute of Electrical and Electronics Engineers AHS Jet Propulsion Laboratory California Institute of Technology Boeing Company Flight Sciences and Advanced Design Group Guidance Navigation and Control (GN and C) Systems Engineer Distributed Space Systems NASA Goddard Space Flight Center (GSFC) AIAA GN and C Technical Committee Department of Aerospace Engineering and Engineering Mechanics University of Texas Austin United States Institute of Navigation American Astronautical Society AIAA Guidance Navigation (GN and C) and Control Technical Committee Department of Aerospace Engineering Iowa State University Iowa

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Marine mammal noise-exposure criteria: Initial scientific recommendations

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Bioacoustics 2008年第1-3期17卷 273-275页

作者： Southall, Brandon L. Bowles, Ann E. Ellison, William T. Finneran, James J. Gentry, Roger L. Greene, Charles R. Kastak, David Ketten, Darlene R. Miller, James H. Nachtigall, Paul E. Richardson, W. John Thomas, Jeanette A. Tyack, Peter L. Marine Ecosystems Division Ocean Acoustics Program National Oceanic and Atmospheric Administration (NOAA) National Marine Fisheries Service Office of Science and Technology Silver Spring MD 20910-6233 1315 East-West Highway United States Long Marine Laboratory University of California Santa Cruz Santa Cruz CA 95060 100 Shaffer Road United States Hubbs-Sea World Research Institute San Diego CA 92109 2595 Ingraham Street United States Marine Acoustics Inc. Middletown RI 02842 809 Aquidneck Avenue United States U. S. Navy Marine Mammal Program Space and Naval Warfare Systems Center San Diego San Diego CA 92152-5000 53560 Hull Street United States ProScience Consulting LLC Dickerson MD 20842-0177 22331 Mt. Ephraim Road United States Greeneridge Sciences Inc. Santa Barbara CA 93110 4512 Via Huerto United States Woods Hole Oceanographic Institution Woods Hole MA 02543 United States Department of Otology and Laryngology Harvard Medical School Boston MA 02114 United States Department of Ocean Engineering University of Rhode Island Narragansett RI 02882 South Ferry Road United States Hawaii Institute of Marine Biology Kane'ohe HI 96744 P.O. Box 1346 United States LGL Ltd. Environmental Research Associates King City ON L7B 1A6 P.O. Box 280 22 Fisher Street Canada Department of Biological Sciences Western Illinois University Quad Cities Moline IL 61265 3561 60th Street United States

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关键词： MARINE animals

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Toward a Global Biodiversity Observing System

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science 2008年第5892期321卷 1044-1045页

作者： R. J. Scholes G. M. Mace W. Turner G. N. Geller N. Jürgens A. Larigauderie D. Muchoney B. A. Walther H. A. Mooney Council of Scientific and Industrial Research (CSIR) Natural Resources and Environment Post Office Box 395 Pretoria 0001 South Africa. Centre for Population Biology National Environment Research Council Imperial College London Silwood Park Ascot Berkshire SL5 7PY UK. Earth Science Division U.S. National Aeronautics and Space Administration (NASA) Headquarters 300 E Street S.W. Washington DC 20546-0001 USA. NASA Ecological Forecasting Program Jet Propulsion Laboratory California Institute of Technology MS171-264 4800 Oak Grove Drive Pasadena CA 91109-8099 USA. University of Hamburg BioCentre Klein Flottbek and Botanical Garden Ohnhorststrasse 18 22609 Hamburg Germany. DIVERSITAS Muséum National d'Histoire Naturelle Maison Buffon 57 rue Cuvier-Case Postale 41 75231 Paris Cedex 05 France. Group on Earth Observations (GEO) 7 bis avenue de la Paix Case Postale 2300 CH-1211 Geneva 2 Switzerland. Department of Biological Sciences Stanford University Stanford CA 94305 USA.

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NASA's Earth science Gateway: A Platform for Interoperable Services in Support of the GEOSS Vision

NASA's Earth Science Gateway: A Platform for Interoperable S...

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IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

作者： Alameh, Nadine S. Bambacus, Myra J. Evans, John D. Marley, Stephen R. MobiLaps LLC NASA Applied Sciences Program GeoSciences Interoperability Office Greenbelt MD United States National Aeronautics and Space Administration (NASA) NASA Applied Sciences Program GeoSciences Interoperability Office Greenbelt MD United States Global Science and Technology Inc. NASA Applied Sciences Program GeoSciences Interoperability Office Greenbelt MD United States Software Consultants Inc. NASA Applied Sciences Program GeoSciences Interoperability Office Greenbelt MD United States

ISBN: (纸本)9780780395091

NASA's Earth science Gateway (ESG) is designed to streamline access to distributed geospatial data, imagery, models and visualizations through open, standard Web protocols. As such, ESG enables scientists, decision-makers, and others to access a wide variety of observations and predictions of natural and human phenomena related to Earth science from NASA and other sources. This paper describes ESG in the context of the Global Earth Observation System of Systems (GEOSS) initiative, focusing primarily on how a standards-based extensible platform such as ESG can bring together distributed resources to create an environment that can best support the GEOSS architecture.

关键词： NASA GEOSS Geospatial Geoscience Information Services Interoperability Earth science Architecture

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Orbital drag - Atmospheric density concept of operations 2004 update

Orbital drag - Atmospheric density concept of operations 200...

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43rd AIAA Aerospace sciences Meeting and Exhibit

作者： Buell, Diane D. Walterscheid, Richard Marcos, Frank A. Fuller-Rowell, Tim Picone, J. Michael Storz, Mark Owens, Jerry K. MITRE Corporation Bedford MA 01730 Aerospace Corporation Los Angeles CA 90009 Air Force Research Laboratory Hanscom AFB MA 01731 CIRES University of Colorado NOAA Space Environment Center Boulder CO 80305 Naval Research Laboratory Washington DC 20375 HQ Air Force Space Command Directorate of Plans and Programs Colorado Springs CO 80910 NASA Marshall Space Flight Center Huntsville AL 35805 Economic and Decision Analysis Center M/S M230 Space Program Operations M/S M2-254 Space Vehicles Directorate AAFRL/VSBXT Research and Development Division Space Environment Center Upper Atmospheric Modeling Section Space Sciences Division Code 7643 Force Enhancement Branch Analysis Division HQ AFSPC/XPY National Space Science and Technology Center SD21

This paper presents the current, near-term, and future Concept of Operations (CONOPS) for using space-based observations in satellite orbital drag specification and prediction. The Concept of Operations was used for neutral density requirements refinement for the national Polar-orbiting Operational Environmental Satellite System (NPOESS). This concept resulted from interaction with various user groups and atmospheric density modelers. Copyright © 2005 by The MITRE Corporation. All rights reserved.

关键词： Satellites

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Message from the Technical program Committee chair

Proceedings - 2005 IEEE International Workshop on Antenna Te...

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Proceedings - 2005 IEEE International Workshop on Antenna technology: Small Antennas and Novel Metamaterials, IWAT 2005 2005年 2005卷 5-5页

作者： Li, Le-Wei De Maagt, Peter Chen, Xiaodong He, Sailing Hori, Toshikazu Jin, Rong-Hong Leung, Kwok Wa Liu, Duixian Min, Kyeong-Sik Tay, Roger Wu, Zhipeng Zhu, Lei Zhang, Yue Ping Technical Program Committee National University of Singapore Singapore Technical Program Committee European Space Agency Singapore Queen Mary College University of London United Kingdom Royal Institute of Technology Sweden University of Fukui Japan Shanghai Jiao-Tong University China City University of Hong Kong Hong Kong Thomas J. Watson Research Center IBM United States Korea Maritime University Korea Republic of Motorala Inc. University of Manchester Institute of Science and Technology United Kingdom Nanyang Technological University Singapore

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Emerging issues in using space for managing the planet: Policy and economics

Emerging issues in using space for managing the planet: Poli...

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International Astronautical Federation - 55th International Astronautical Congress 2004

作者： Williamson, Ray A. Hertzfeld, Henry R. Sen, Avery Space Policy Institute Center for International Science and Technology Policy George Washington University Washington DC United States Program Planning and Integration National Oceanic and Atmospheric Administration Washington DC

Earth science research from the vantage point of space has reached the point where it now contributes significantly to the ability of governments and private industry to reduce costs and increase the benefits from variations in weather and climate. The capacity to manage regional and global natural resources will continue to improve dramatically. More effective and efficient use of weather and climate information will be required as countries around the world attempt to improve their standards of living in a sustainable way. In particular, information must be delivered quickly, inexpensively, and in user-friendly forms to the ultimate end user, who is generally unfamiliar with space systems, needs only the information, and has few incentives to gain expertise in either space activities or meteorology. This paper explores the policy framework by which the United States manages its Earth observations program and suggests ways in which to make the policy framework more "user friendly." Using several examples from recent policy research at the space Policy Institute, this paper examines the socioeconomic value of several applications of Earth observations from space and examines how the United States might improve the policy process by which it moves Earth observations from space (merged with in situ and other data) into useful information products for the ultimate end user.

关键词： space applications

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Future USN aircraft carrier analysis of alternatives

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NAVAL ENGINEERS JOURNAL 2000年第3期112卷 15-25页

作者： Raber, JD Perin, DA Mr. James D. Raber:received a master of science degree in naval architecture and marine engineering from the Massachusetts Institute of Technology in 1967. Since 1967 he has worked for the Navy Sea Systems Command (NAVSEA) and predecessor organizations in the area of early stage design of naval ships. Among the major USN programs he has supported are the FFG 7 and DDG 51. In the late ‘70s he was the NAVSEA representative to the CNO DDX Study Group which established the general requirements for the DDG 51 class. He has been active in international technical exchange programs for which he was awarded membership in the National Order of Merit by the Republic of France in 1992. Since early 1996 he has been the NAVSEA Ship Concept Team Leader for what is now the CVNX Program. Dr. David A. Perin:received a PhD in mathematics from the University of Michigan in 1971. He joined the Center for Naval Analyses in 1973 where he has led a wide variety of studies on naval warfare. From 1985 to 1987 he served as the CNA representative on the staff of Commander Striking Fleet Atlantic for which he was awarded a Defense Distinguished Service Medal. During the 1990s he has led formal analysis of alternatives for the LPD-17 F/A-18E/F and CVX. Currently he is the Director of the JCC(X) Analysis of Alternatives.

In March 1996, the Department of Defense established a new program, then known as CVX, to develop a new class of aircraft carrier that would eventually replace the Nimitz class. The first step in the concept develop was exploring a wide range of alternative design concepts in a formal study known as an Analysis of Alternatives (AOA), which assessed their cost and operational effectiveness. About 70 total ship studies were developed to explore the range of design features, including airwing size and type, propulsion type, ship mobility performance, and a variety of survivability features. The AOA also assessed the performance of and total ownership cost of a large number of potential subsystem technologies. This paper summarizes the total ship studies developed for the AOA describes the ship system performance and total ownership cost of these alternatives, and discusses the rationale for determining some of the primary system requirements. Thus, the paper will provide insight into the Navy's intentions for system requirements and features to be incorporated into the U.S. Navy's future aircraft carriers.

关键词： design features Aircraft survivability ANGLE OF ATTACK United States Department of Defense system requirements Alternatives analysis AIRCRAFT CARRIER Ships Total Costs

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