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Optimizing the NASA technical report server

INTERNET RESEARCH-ELECTRONIC NETWORKING APPLICATIONS AND POLICY 1996年第1期6卷 64-&页

作者： Nelson, ML Maa, MH Michael L. Nelson is the “webmaster” for NASA Langley Research Center Computer Systems Branch Mail Stop 157A 15 Langley Boulevard Hampton VA 23681‐0001 USA. Tel: 804 8648511 Fax: 804 8648342 E‐mail: <m.l.nelson@larc.nasa.gov> . He has also worked with others to implement report servers software servers technology transfer databases and other World Wide Web services and is also the technical lead for NASA Langley Research Center’s workstation clustering activities. Ming‐Hokng Maa is a NASA Langley Research Center Cooperative Education Student e‐mail: <m.h.maa@larc.nasa.gov> pursuing his BS in computer engineering/computer science at the Massachusetts Institute of Technology. He has previously held research positions at nView Corp. and the Inter‐National Research Institute Inc Ming‐Hokng Maa is a NASA Langley Research Center Cooperative Education Student e‐mail: <m.h.maa@larc.nasa.gov> pursuing his BS in computer engineering/computer science at the Massachusetts Institute of Technology. He has previously held research positions at nView Corp. and the Inter‐National Research Institute Inc

Explains how the NASA Technical Report Server, a World Wide Web report distribution NASA technical publications service, has been modified for performance enhancement, greater protocol support and human interface optimization. Results include: parallel database queries, significantly decreasing user access times by an average factor of 2.3;access from clients behind firewalls and/or proxies which truncate excessively long Uniform Resource Locators;access to non-Wide Area Information Server (WAIS) databases and compatibility with the Z39-50.3 protocol;and a streamlined user interface.

关键词： distribution information retrieval information services Internet

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Assessor agreement in rating SPICE processes

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software Process: Improvement and Practice 1996年第4期2卷

作者： Khaled El Emam Lionel Briand Robert Smith Fraunhofer Institute for Experimental Software Engineering Sauerwiesen 6 D-67661 Kaiserslautern Germany European Software Institute Parque Tecnologico de Zamudio #204 E-48170 Bilbao Spain

One of the enduring issues being evaluated during the SPICE trials is the reliability of assessments. One type of reliability is the extent to which different assessors produce similar ratings when assessing the same organization and presented with the same evidence. In this paper we report on a study that was conducted to start answering this question. Data was collected from an assessment of 21 process instances covering 15 processes. In each of these assessments two independent assessors performed the ratings. We found that six of the fifteen processes do not meet our minimal benchmark for interrater agreement. Three of these were due to systematic biases by either an internal or external assessor. Furthermore, for eight processes specific rating scale adjustments were identified that could improve its reliability. The findings reported in this paper provide guidance for assessors using the SPICE framework. © 1996 by John Wiley & Sons Ltd and Gauthier-Villars

关键词： software Process Assessment Reliability of Measurement Interrater Agreement

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An Empirical Evaluation of the Prospective International SPICE Standard

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software Process: Improvement and Practice 1996年第2期2卷

作者： Khaled El Emam Dennis R. Goldenson Fraunhofer IESE Sauerwiesen 6 D-67661 Kaiserslautern Germany Software Engineering Institute Carnegie Mellon University Pittsburgh PA 15213-3890 USA

The SPICE project aims to deliver an international standard on software process assessment. Unique among software engineering standards efforts, there is an empirical trials activity as part of the SPICE project. The first phase of these trials was completed in calendar year 1995. During phase 1 data was collected to evaluate design decisions of the SPICE framework and the usability of the core SPICE documents. Part of this data was collected using questionnaires. The respondents were both assessors and assessees. In this paper we present an analysis of the responses to these questionnaires based on 35 assessments conducted during phase 1 of the SPICE trials. The results indicate that the SPICE framework is in general sound, but they also highlight some potential weaknesses. Recommendations to the SPICE project based on these results are presented.

关键词： SPICE software process assessment software process improvement empirical evaluation

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Problem resolution during life cycle maintenance: A case study

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NAVAL ENGINEERS JOURNAL 1996年第3期108卷 171-177页

作者： Kerchner, RJ Bailey, J McCarthy, M Seegal, RH Warpinski, J Wilson, J Robert Kerchner:is currently working as a senior test engineer on the Surface Ship Torpedo Defense System and the AN/SQQ-89 ASW Combat System for Signal Corporation. Previously he was working as a system test engineer on the AN/SQQ-89 and AN/BSY-2 Combat Systems for GE Aerospace based in Syracuse N. Y. He received his B.S. degree in Physics from Westminster College. John Bailey:is currently working as a software engineer for the Multi-Sensor Torpedo Recognition and Alertment Processor and the AN/SQS-53C subsystem for Westinghouse Electric Corp. Previously he was working as an electrical engineer on the Longbow and APG-66 Mid Life Update programs. He received his B.S. degree in Electrical Engineering degree from Virginia Tech in 1987. He is currently working on his M.S. degree in Computer Science at Johns Hopkins University. Mike McCarthy:is currently working as a system test engineer for the passive subsystem COTS replacement for the AN/SQS-53C. Previously he was working as a system test engineer developing integration and functional tests for the MK116 Mod 7 and AN/SQS-53C subsystems for GE Aerospace based in Syracuse N. Y. He received his B.S. degree in Electrical & Computer Engineering from Clarkson University. Bob Seegal:is currently working as a systems engineer for the AN/SQQ-89 Combat System for Westinghouse Electric Corp. He has spent the past thirty years as a systems engineer working on various active and passive sonars which include the BQS-6 SQS-56 SQQ-32 and AN/SQS-53C systems. He received his B.S. degree in Applied Math from Brown University and an M.A. degree in Physics from Columbia University. Jeanne Warpinski:is currently working as a lead software engineer for the AN/SQQ-89 Combat System at the Naval Undersea Warfare Center at New London CT. She has spent the last ten years as a software engineer and configuration management specialist for the AN/SQR-19 AN/SQQ-28 and AN/SQS-53C subsystems. She received her B.S. degree in Computer Science from the University of Wisconsin. Jerry Wilson:is c

This paper is a case study of how problem resolution can operate in the life cycle maintenance stage of a large tactical sonar system. Here, the system design agent is not the original designer, so the principles of operation, hardware and software architecture, and test tools need to be learned. To deal with this challenge, the system design agent evolved a team approach that integrates the talents of a program manager, a system engineer, a test engineer, and a software engineer to analyze fleet problems. This team has proven effective at localizing problems for repair. Lessons are drawn to further improve maintenance efficiency.

关键词： Electronic ship equipment

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Experiences in object-oriented programming

Experiences in object-oriented programming

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International Conference on TRI-Ada 1995: Ada's Role in Global Markets: Solutions for a Changing Complex World, TRI-Ada 1995

作者： Barbey, Stéphane Balfour, Brad Beckwith, Bill Weller, David Switzerland CACI Switzerland Objective Interface Systems Switzerland Hughes Training Inc. Switzerland Swiss Federal Institute of Technology Software Engineering Laboratory Lausanne Ecublens1015 Switzerland

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Runtime support for data parallel tasks

Runtime support for data parallel tasks

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Frontiers of Massively Parallel Computation

作者： M. Haines B. Hess P. Mehrotra J. Van Rosendale H. Zima Institute for Computer Applications in Science and Engineering NASA-Langley Research Center Hampton VA USA Institute for Software Technology and Parallel Systems University of Technology Vienna Vienna Austria

We have recently introduced Opus, a set of Fortran language extensions that provide shared data abstractions (SDAs) as a mechanism for communication and synchronization among coarse-grain data parallel tasks. In this paper, we discuss the design and implementation issues of the runtime system necessary to support SDAs, and outline the underlying requirements for such a runtime system. We explore the feasibility of this approach by implementing a prototype of the runtime system. We give preliminary results of the prototype on the Intel Paragon, outline the current status of the project, and discuss future plans.< >

关键词： Runtime Aircraft propulsion NASA Prototypes Data structures Parallel languages Parallel processing Design optimization Aerospace control Computer applications

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A DATA-ACQUISITION SYSTEM FOR MACHINE-TOOL CONDITION MONITORING

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QUALITY AND RELIABILITY engineering INTERNATIONAL 1995年第1期11卷 15-26页

作者： DRAKE, PR JENNINGS, AD GROSVENOR, RI WHITTLETON, D Systems Engineering Division School of Engineering University of Wales College of Cardiff (UWCC) PO Box 917 Newport Road Cardiff CF2 1XH U.K. Paul Drake:has a B.Sc. in Statistics an M.Sc. in Systems Engineering and a Ph.D. in Fault Diagnosis from the University of Wales. He gained several years experience of developing information systems while working in industry. At present he is a lecturer in Systems Engineering at the Cardiff School of Engineering within the University of Wales College of Cardiff. He is an active researcher in the field of machine condition monitoring and fault diagnosis in collaboration with industrial partners. He is also involved in the application of artificial intelligence techniques within manufacturing. He is a Chartered Engineer and a member of the Institution of Electrical Engineers. July 1994 saw the publication of a book entitledCondition Based Maintenance and Machine Diagnosticsof which he was a co-author. Alun Jennings:has a B.Sc. in mechanical engineering from Portsmouth Polytechnic and an M.Sc. from Manchester University. He is a chartered mechanical engineer with experience in fault diagnosis and product development. Currently he is employed as a research associate at UWCC on the MIRAM project. Roger Grosvenor:is an IT lecturer is Systems Engineering at the Cardiff School of Engineering within the University of Wales College of Cardiff. His teaching covers reliability engineering instrumentation and measurement and digital control. His main research interests are in-process measurement on machine tools and condition monitoring of machine tools. Prior to his ten years at UWCC he was a development engineer in the heating and ventilation industry. He holds a B. Eng. in mechanical engineering and an M. Eng. both from the University of Wales and is a member of the Institute of Measurement and Control. He is currently a principal investigator on two European research grants in the field of condition monitoring and maintenance of machine tools. David Whittleton:is a pract

A flexible, generically applicable and inexpensive data acquisition system (DAS), for machine tool condition monitoring, has been designed, constructed and installed as part of a European Union sponsored project. The DAS is more than just a data logger and an array of sensors. It also consists of a methodology for analysing data logging requirements and a relational database that supports this methodology. The database is held on a central 'maintenance management' computer. The monitoring to be carried out by the DAS is specified through this database, which contains detailed information about the DAS's facilities. This feature makes it simple to reconfigure the DAS to implement new monitoring requirements and to customize its operation to meet the the needs of different machines. The information in the database is transformed into a look-up table that is read by the software that sets up and controls the data logging processes.

关键词： CONDITION MONITORING DATA ACQUISITION MACHINE TOOLS

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Development and application of MCAL tools for marine radar instruction

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Computer Applications in engineering Education 1995年第4期3卷 259-259页

作者： Guirguis, S. Korany, E. Abdel-Bary, A. Institute of Graduate Studies and Research Alexandria University Alexandria Egypt Shawkat K. Guirguis:obtained the BSc and M.Sc. degrees in Computer Science and Automatic Control Faculty of Engineering Alexandria University in 1981 and 1984 respectively. In 1988 he obtained a PhD degree in Electronics and Communications Faculty of Engineering Cairo University co-supervised by the Imperial College of Science and Technology University of London where he spent two years as an academic visitor. His current research interests include software quality management multimedia automatic programming and decision support systems. He is currently a lecturer of Computer Science at the Institute of Graduate Studies & Research Alexandria University. Ezzat A. Korany:received the BS degree in Electrical Engineering (Electronics Section) from the University of Alexandria Egypt in 1971 the MS degree in Electrical Engineering (Computer Section) from Ain Shams University Cairo Egypt in 1977 and the PhD degree in Electrical Engineering (Digital Systems) from Florida Institute of Technology U.S.A. in 1982. He is currently an associate professor of Computer Science at the Institute of Graduate Studies & Research University of Alexandria. His research interests are in data communications and multimedia applications computer networks image processing and pattern recognition. Abdel-Latif A. Abdel-Bary:obtained the BEng degree in Electronics Technology from Arab Maritime Transport Academy in 1986. In 1995 he obtained the MSc degree in Information Technology from the Institute of Graduate Studies & Research Alexandria University. His current research interests include ICAL hypermedia and automatic programming.

In this article a multimedia computer-assisted learning (MCAL) system is presented. The major objective of this work was to investigate the potential of using such systems as tools for transferring instructional course information through various types of computer media as opposed to the classic CAL systems. The philosophy and techniques employed to design the system are investigated. Usage of the implemented system and its merits have been illustrated through its application to teach engineering students and technicians the theory and concepts of marine radar. System design, implementation, test, and revision phases are presented and discussed.

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software process management and business process (Re-)engineering 3rd

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3rd European Workshop on software Process Technology, EWSPT 1994

作者： Gruhn, Volker Fraunhofer Institute for Software and Systems Engineering Baroper Straße 301 Dortmund44227 Germany LION GmbH Universitätsstraße 140 Bochum44799 Germany

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PARALLEL AND DISTRIBUTED TLM COMPUTATION WITH SIGNAL-PROCESSING FOR ELECTROMAGNETIC-FIELD MODELING

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第3-4期8卷 169-185页

作者： SO, PPM ESWARAPPA, C HOEFER, WJR NSERC/MPR Teltech Research Chair in RF Engineering Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia V8W 3P6 Canada Poman So received his B.Sc. degree in computer science and physics from the University of Toronto Toronto Onatario Canada in 1985. He obtained his B.A. Sc. and M.A.Sc. degrees in electrical engineering (summa cum laude) from the University of Ottawa Ottawa Ontario Canada in 1987 and 1989 respectively. Mr So was a research engineer in the University of Ottawa from January 1989 to October 1991 his research interests included CAD techniques of microwave circuits and numerical methods for electromagnetic wave modelling. He specialized in the development of electromagnetic engineering CAD software and successfully implemented a number of electromagnetic wave simulators based on the two-dimensional and three-dimensional transmission-line matrix methods. From August 1990 to February 1991 he accompanied Professor W. J. R. Hoefer to Rome Italy and Sophia Antiopolas France. During that time he implemented a parallel version of the 3D-TLM simulator for the CM-2 Connection Machine using C-Star and X Windows Library. He is a research engineer and a Ph.D. student at the University of Victoria Victoria British Columbia Canada. He ported the 2D- and 3D-TLM simulators to DECmpp 1200 massively parallel computer using MPL C and C++. He also combined OSA90/hope a commercially available microwave CAD program with a 2D-TLM simulation module for geometry optimization using the Datapipe technique of OSA90/hope. Recently he has developed a distributed client-server computing technique for the TLM method this technique could accelerate the TLM simulation by more than an order of magnitude. Channabasappa Eswarappa received the M.Tech. degree in electrical engineering from the Indian Institute of Technology Kanpur India in 1983 and Ph. D. degree from the University of Ottawa Canada in 1990. He worked as an Assistant Executive Engineer and later as

This paper describes the implementation of transmission-line matrix (TLM) method algorithms on a massively parallel computer (DECmpp 12000), the technique of distributed computing in the UNIX environment, and the combination of TLM analysis with Prony's method as well as with autoregressive moving average (ARMA) digital signal processing for electromagnetic field modelling. By combining these advanced computation techniques, typical electromagnetic field modelling of microwave structures by TLM analysis can be accelerated by a few orders of magnitude.

关键词： Mathematical models

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