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NOISE CHARACTERISTICS OF 340 nm AND 280 nmGaN-BASED LIGHT EMITTING DIODES

International Journal of High Speed Electronics and systems 2004年第3期14卷 702-707页

作者： SHAYLA SAWYER SERGEY L. RUMYANTSEV NEZIH PALA MICHAEL S. SHUR YURIY BILENKO REMIS GASKA PAVEL V. KOSTERIN BRIAN M. SALZBERG Department of Electrical Computer and Systems Engineering Center for Broadband Data Transport Science and Technology CII 9017 Rensselaer Polytechnic Institute Troy NY 12180-3590 USA Sensor Electronic Technology Inc. 1195 Atlas Road Columbia SC 29209 USA Departments of Neuroscience and Physiology University of Pennsylvania School of Medicine Philadelphia PA 19104 USA

Low frequency fluctuations in light intensity of 340 nm and 280 nm GaN -based light emitting diodes (LEDs) are compared with noise properties of other commercially available UV and visible wavelength LEDs and halogen lamps. At low frequencies, LEDs can exhibit lower levels of noise than halogen lamps. An LED noise quality factor β is estimated for the UV LEDs.

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Noise characteristics of 340 nm and 280 in GaN-based light emitting diodes

Noise characteristics of 340 nm and 280 in GaN-based light e...

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IEEE Conference on High Performance Devices

作者： S. Sawyer S.L. Rumyantsev N. Pala M.S. Shur Y. Bilenko R. Gaska P.V. Kosterin B.M. Salzberg Department of Electrical Computer and Systems Engineering Center for Broadband Data Transport Science and Technology Cll 9017 Rensselaer Polytechnic Institute Troy NY USA Sensor Electronic Technology Inc.orporated Columbia SC USA Departments of Neuroscience and Physiology University of Pennsylvania School of Medicine Philadelphia PA USA

Low frequency fluctuations in light intensity of 340 nm and 280 nm GaN-based light emitting diodes (LEDs) are compared with noise properties of other commercially available UV and visible wavelength LEDs and halogen lamps. At low frequencies, LEDs can exhibit lower levels of noise than halogen lamps. An LED noise quality factor beta is estimated for the UV LEDs

关键词： Light emitting diodes Optical noise Fluctuations Low-frequency noise Light sources Frequency Photodiodes Resistors Proteins Batteries

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Preface

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Lecture Notes in Computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2001年 2037卷 V-VI页

作者： Boers, Egbert J. W. Cagnoni, Stefano Gottlieb, Jens Hart, Emma Lanzi, Pier Luca Raidl, Günther R. Smith, Robert E. Tijink, Harald Leiden Institute of Advanced Computer Science Leiden University Niels Bohrweg 1 Leiden Netherlands Dept. of Computer Engineering University of Parma Parco Area delle Scienze 181/a Parma Italy SAP AG Neurottstrasse 16 Walldorf Germany Napier University School of Computing 219 Colinton Road Edinburgh United Kingdom Polytechnic of Milan Piazza Leonardo da Vinci 32 Milan Italy Algorithms and Data Structur es Group Institute of Computer Graphics Vienna University of Technology Favoritenstrasse 9-11/186 Vienna Austria The Intelligent Computer Systems Centre The University of The West of England Coldharbour Lane Frenchay Bristol United Kingdom Data and Knowledge Systems Department National Aerospace Laboratory NLR P.O. Box 153 Emmeloord Netherlands

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ViMPIOS, a "truly" portable MPI-IO implementation 8

ViMPIOS, a "truly" portable MPI-IO implementation

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8th Euromicro Workshop on Parallel and Distributed Processing, EURO-PDP 2000

作者： Stockinger, K. Schikuta, E. Institute for Applied Computer Science and Information Systems Department of Data Engineering University of Vienna Rathausstr. 19/4 ViennaA-1010 Austria IT Division CERN Geneva 23CH-1211 Switzerland

ISBN: (纸本)0769505007

We present ViMPIOS, a novel MPI-IO implementation based on ViPIOS, the Vienna Parallel Input Output System. ViMPIOS inherits the defining characteristics of ViPIOS, which makes it a client-server based system focusing on cluster architectures. ViMPIOS stands out from all other MPI-IO implementations by its "truly" portable design, which allows not only applications to be transferred between parallel architectures easily but also to keep their original performance characteristics on the new platform as far as possible. This is kept by the "smart" AI-blackboard module of ViPIOS, which is responsible for an appropriate data layout. Specifically in this paper we concentrate on the algorithm, which maps MPI-IO data structures on respective ViPIOS structures, and thus allows to exploit the ViPIOS properties. © 2000 IEEE.

关键词： Parallel architectures

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ViMPIOS, a "truly" portable MPI-IO implementation

ViMPIOS, a "truly" portable MPI-IO implementation

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Euromicro Workshop on Parallel and Distributed Processing

作者： K. Stockinger E. Schikuta IT Division CERN Geneva Switzerland Institute for Applied Computer Science and Information Systems Department of Data Engineering University of Technology Vienna Vienna Austria

关键词： data structures High performance computing Message passing Programming profession Information systems data engineering Read only memory Bandwidth Libraries Parallel architectures

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A knowledge base for the optimization of parallel query execution plans 3

A knowledge base for the optimization of parallel query exec...

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3rd International Symposium on Parallel Architectures, Algorithms, and Networks, I-SPAN 1997

作者： Schikuta, E. Kirkovits, P. Institute of Applied Computer Science and Information Systems Department of Data Engineering University of Vienna Rathausstr. 19/4 ViennaA-1010 Austria

In this paper we present a knowledge base for the generation and optimization of query execution plans for parallel database systems. This knowledge base builds the basis of a novel extended blackboard architecture for the optimization of parallel query execution plans, which is based on a bottom-up building block approach. It allows to find (near) optimal execution plans out of a possibly huge search space in reasonable time. © 1997 IEEE.

关键词： Query processing

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A knowledge base for the optimization of parallel query execution plans

A knowledge base for the optimization of parallel query exec...

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International Symposium on Parallel Architectures, Algorithms and Networks (ISPAN)

作者： E. Schikuta P. Kirkovits Institute of Applied Computer Science and Information Systems Department of Data Engineering University of Technology Vienna Vienna Austria

关键词： database systems Parallel processing Space technology Cost function Computer science Information systems data engineering Load management Query processing Object oriented databases

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Influence of human engineering on manning levels and human performance on ships

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NAVAL ENGINEERS JOURNAL 1997年第5期109卷 67-76页

作者： Anderson, DE Oberman, FR Malone, TB Baker, CC David E. Anderson:has a bachelor of science degree in environmental engineering from Florida Technological University and a master's degree in environmental engineering from the University of Central Florida. He is a graduate of the Naval Sea Systems Command's Engineer-In-Training (EIT) Program. Mr. Anderson was instrumental in introducing the collective protection system (CPS) in the U.S. Navy developing the initial forward-fit package for the USS Gunston Hall and the engineering change proposal (ECP) for the USS Wasp. In 1990 he joined the Human Systems Integration (HSI) Division (SEA 55W5) where he was task leader for auxiliary ships. He is currently the HSI manager for the future technology variant of the SeaLift ship and the future carrier. Association of Scientists and Engineers 33rdAnnual Technical Symposium 26 April 1996. Fred R. Oberman:has B.A. and M.A. degrees from the University of Chicago and Loyola University (experimental psychology) and an M.S. degree in industrial engineering and operations research from Virginia Polytechnic Institute (VPI). He has more than 30 years experience in HSI management planning research analysis design and testing in government and private sector positions. He is currently responsible for NavSea HSI generic research and tool development efforts. He is responsible for Human Engineering Specifications and Standards (Commercial Hypertext) and is the NavSea 03D7 representative on HSI in Performance Specifications and for integration of HSI within Integrated Logistic Support (ILS). He has served as DoD HSI SubTAG chair and member of the Simulation and Modeling Test and Evaluation Display and Control Systems Human Computer Interaction Specifications and Standards and Systems Design Sub Tags as a member of the Society of Naval Architects and Marine Engineers (SNAME) Systems Safety Panel and a member of NATO RSG 14 on man-machine analysis. Thomas B. Malone: CHFEP received a Ph.D. in experimental psychology from Fordham University in 1964. He is president of Carlow

The objectives of Human engineering (HE) are generally viewed as increasing human performance, reducing human error, enhancing personnel and equipment safety, and reducing training and related personnel costs. There are other benefits that are thoroughly consistent with the direction of the Navy of the future, chief among these is reduction of required numbers of personnel to operate and maintain Navy ships. The Naval Research Advisory Committee (NRAC) report on Man-Machine Technology in the Navy estimated that one of the benefits from increased application of man-machine technology to Navy ship design is personnel reduction as well as improving system availability, effectiveness, and safety The objective of this paper is to discuss aspects of the human engineering design of ships and systems that affect manning requirements, and impact human-performance and safety The paper will also discuss how the application of human engineering leads to improved performance, and crew safety, and reduced workload, all of which influence manning levels. Finally, the paper presents a discussion of tools and case studies of good human engineering design practices which reduce manning.

关键词： Human engineering

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Repackaging database systems

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ACM Computing Surveys 1996年第4ES期28卷

作者： David Maier Oregon Graduate Institute Department of Computer Science and Engineering Data-Intensive Systems Center P.O. Box 91000 Portland OR

No abstract available.

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EFFECTS OF SAMPLE ISOLATION AND HANDLING ON THE RECOVERY OF PURGEABLE ORGANIC-COMPOUNDS

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GROUND WATER MONITORING AND REMEDIATION 1994年第2期14卷 142-152页

作者： GIBS, J IMBRIGIOTTA, TE FICKEN, JH PANKOW, JF ROSEN, ME Jacob Gibs is a water quality specialist with the USGS Water Resources Division (810 Bear Tavern Rd. Ste. 206 West Trenton NJ 08628). He received his B.S. in mechanical engineering in 1968 his M.S. in environmental engineering in 1975 and his Ph.D. in environmental engineering in 1983 all from Drexel University in Philadelphia. His research interests include evaluating representative ground water and surface water sampling techniques for trace levels of organic and inorganic compounds and designing new sampling devices. Thomas E. Imbrigiotta received a B.S. in chemistry with a concentration in environmental studies from Oakland University Rochester Michigan in 1975. He then attended the University of Wisconsin Madison and received an M.S. in water chemistry in 1982. He has been a hydrologist with the USGS Water Resources Division (810 Bear Tavern Rd. Ste. 206 West Trenton NJ 08628) since 1977. He worked in the Indiana District from 1977 to 1984 prior to coming to the New Jersey District. Currently he is project coordinator for the Picatinny Research project a study of the fate and transport of chlorinated solvents in ground water at Picatinny Arsenal New Jersey. Previously he was chief of a project evaluating sampling techniques for organics in ground water. James H. Ficken worked for the USGS Water Resources Division as a chemical engineer from 1964 to 1992. He received his B.S. in chemical engineering in 1962 from Washington University in St. Louis Missouri. His research interests were water quality instrumentation and sensors that measure real-time environmental data. He contributed as a team member to the design and development of the USGS water quality flow-through and mini-monitor system. Ficken passed away in 1992. James F. Pankow is a professor in the Department of Environmental Science and Engineering at the Oregon Graduate Institute (Oregon Graduate Institute of Science and Technology Department of Environmental Science and Engineering P.O. Box 1900 Portland OR 97291–1000). He

This report compares the recovery of purgeable organic compounds (POCs) obtained by using a downhole isobaric sampler developed by the U.S. Geological Survey, a helical-rotor submersible pump, and a point source bailer to collect and isolate samples of ground water from three wells in New York and New Jersey, the samples contained a total of 13 POCs detectable at concentrations ranging from 0.5 mug/L to about 400 mug/L. This report also compares the effects of sample handling, specifically the differences in POC concentration recovery when an isobaric sample container is filled at land surface vs. when it is filled downhole, and when samples are taken using a bailer with and without a bottom-emptying device. These case studies are used to quantify the possible effects of different sample-isolation and sample-handling techniques on POC recovery. The relative effectiveness of the three devices varied by site and by compound. Overall, the POC recoveries achieved by using the helical-rotor submersible pump and the downhole isobaric sampler were not significantly different at the 95 percent confidence level. POC recovery obtained by using the point source bailer was 11 percent lower overall. The downhole isobaric sampler results exhibited smaller coefficients of variation than did the helical-rotor submersible pump or the point-source bailer results. However, the differences between the coefficients of variation of the downhole isobaric sampler and those of the helical-rotor submersible pump were not significant the 95 percent confidence level. The nonsignificant smaller coefficient of variation of the downhole isobaric sampler apparently resulted from two fewer sample handling steps that exposed the sample water to ambient air. An independent experiment performed with a different downhole sampler at one of the wells used in this investigation produced a similar statistical result. Also, the POC recovery obtained by pouring sample water out the top Of a point source bail

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