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A meta-process model for the planned development of integrated systems

Journal of systems Integration 1993年第3-4期3卷 225-249页

作者： Rossak, Wilhelm Zemel, Tamar Lawson, Harold W. New Jersey Institute of Technology Department of Computer and Information Science Systems Integration Laboratory University Heights Newark 07102 NJ United States Lawson Publishing and Consulting Inc. Lindingo 181 33 Torshammarsvagen 11 Sweden

Maturity of technologies from one side and customers' demands from the other side have led to the need to develop increasingly large and complex systems. The problem we face is to structure the development of these types of systems and the systems themselves in a useful way and to support the development process from its conceptual foundation to its tool aspect. We believe that we must take one step beyond the current software engineering methodology to be able to cope with this task. What we propose is a framework, a meta-process model, that allows one to develop in a flexible but integrated manner a distributed, open, and integrated system with a planned approach. Based on the premise that the main factor is to build a common culture of understanding and conceptual thinking in an application domain, we suggest an additional level of coordination and modeling above the various development projects. In analyzing this two-leveled process model, we identify the major processes and models involved. While we focus on the process model itself, we discuss also in some more depth the two major concepts of domain analysis and integration architecture design as they relate to our approach. A strategy for realizing the meta-process model based on the notion of Application Machines is described. © 1993 Kluwer Academic Publishers.

关键词： domain analysis integration architecture mega-systems meta-process model System development system integration system of systems

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A distributed Lisp programming system: Implementation and usage 12

A distributed Lisp programming system: Implementation and us...

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12th International Conference on distributed Computing systems, ICDCS 1992

作者： Pearson, Mark P. Dasgupta, Partha Distributed Systems Laboratory College of Computing Georgia Institute of Technology AtlantaGA30332-0280 United States Department of Computer Science and Engineering Arizona State University TempeAZ85287-5406 United States

The implementation details of a Lisp environment built on top of a distributed operating system are presented. The system provides transparent distribution, protected large-grain persistent heaps, concurrency within e... 详细信息

ISBN: (纸本)0818628650

关键词： distributed computer systems

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A distributed Lisp programming system: implementation and usage

A distributed Lisp programming system: implementation and us...

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International Conference on distributed Computing systems

作者： M.P. Pearson P. Dasgupta Distributed Systems Laboratory College of Computing Georgia Institute of Technology Atlanta GA USA Department of Computer Science and Engineering Arizona State University Tempe AZ USA

关键词： distributed computing Concurrent computing Data structures Runtime environment Educational institutions Protection Workstations Hardware Programming profession Terminology

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distributed optical proximity sensor system: HexEYE

Distributed optical proximity sensor system: HexEYE

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IEEE International Conference on Robotics and Automation (ICRA)

作者： S. Lee Jet Propulsion Laboratory California institute of Technology Pasadena CA USA Department of EE-Systems and Computer Science University of Southern California Los Angeles CA USA

A novel optical proximity sensor system, capable of measuring the distance to the orientation and the discontinuity at a local area of an object surface, was designed and evaluated for robotic applications. The sensor system gets its name, Hexagonal Eye, (HexEYE) from its shape where seven identical hexagonal sensing units were configured hexagonally into a compact geometric structure. The seven sensing units were grouped into multiple combinations of three sensing units to measure the surface orientation as well as surface discontinuity. The distinctive features of HexEYE are an order of magnitude increased in distance sensitivity by optimizing the curvature of a conical mirror, the enhanced measurement accuracy based on multiple levels of sensor fusion, and the compactness in size due to a sensing mechanism based on the Gaussian lens law. A prototype of single sensing unit has been built and was evaluated experimentally.< >

关键词： Optical sensors Sensor systems Area measurement Optical design Robot sensing systems Shape Measurement units Mirrors Size measurement Sensor fusion

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Design And Implementation Of A distributed Optical Proximity Sensor System

Design And Implementation Of A Distributed Optical Proximity...

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IEEE International Workshop on Intelligent Robots and systems (IROS)

作者： Sukhan Lee Hensoo Hahn Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA Department of EE Systems and Computer Science University of Southern California Los Angeles CA USA

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CLIDE: a distributed, symbolic programming system based on large-grained persistent objects

CLIDE: a distributed, symbolic programming system based on l...

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International Conference on distributed Computing systems

Clouds LISP distributed environments (CLIDE) is a distributed, persistent object-based symbolic programming system being implemented on the Clouds distributed operating system. LISP environment instances are stored as large-grained persistent objects, enabling users on many machines to share the contents of these environments through interenvironment evaluations. CLIDE provides a comprehensive research environment for distributed symbolic language, invocation and consistency semantics, and an implementation vehicle for the construction of the symbolic processing portions of complex megaprogrammed systems.< >

关键词： distributed computing Operating systems Application software Artificial intelligence Computational modeling Multiprocessing systems Educational institutions Cloud computing Vehicles Object oriented programming

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computer-SYSTEM ARCHITECTURE CONCEPTS FOR FUTURE COMBAT systems

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NAVAL ENGINEERS JOURNAL 1990年第3期102卷 43-62页

作者： ZITZMAN, LH FALATKO, SM PAPACH, JL Dr. Lewis H. Zitzman:is the group supervisor of the Advanced Systems Design Group Fleet Systems Department The Johns Hopkins University Applied Physics Laboratory (JHU/APL). He has been employed at JHU/APL since 1972 performing applied research in computer science and in investigating and applying advanced computer technologies to Navy shipboard systems. He is currently chairman of Aegis Computer Architecture Data Bus and Fiber Optics Working Group from which many concepts for this paper were generated. Dr. Zitzman received his B.S. degree in physics from Brigham Young University in 1963 and his M.S. and Ph.D. degrees in physics from the University of Illinois in 1967 and 1972 respectively. Stephen M. Falatko:was a senior engineering analyst in the Combat Systems Engineering Department Comptek Research Incorporated for the majority of this effort. He is currently employed at ManTech Services Corporation. During his eight-year career first at The Johns Hopkins University Applied Physics Laboratory and currently with ManTech Mr. Falatko's work has centered around the development of requirements and specifications for future Navy systems and the application of advanced technology to Navy command and control systems. He is a member of both the Computer Architecture Fiber Optics and Data Bus Working Group and the Aegis Fiber Optics Working Group. Mr. Falatko received his B.S. degree in aerospace engineering with high distinction from the University of Virginia in 1982 and his M.S. degree in applied physics from The Johns Hopkins University in 1985. Mr. Falatko is a member of Tau Beta Pi Sigma Gamma Tau the American Society of Naval Engineers and the U.S. Naval Institute. Janet L. Papach:is a section leader and senior engineering analyst in the Combat Systems Engineering Department Comptek Research Incorporated. She has ten years' experience as an analyst supporting NavSea Spa War and the U.S. Department of State. She currently participates in working group efforts under Aegis Combat System Doctrin

This paper sets forth computer systems architecture concepts for the combat system of the 2010–2030 timeframe that satisfy the needs of the next generation of surface combatants. It builds upon the current Aegis computer systems architecture, expanding that architecture while preserving, and adhering to, the Aegis fundamental principle of thorough systems engineering, dedicated to maintaining a well integrated, highly reliable, and easily operable combat system. The implementation of these proposed computer systems concepts in a coherent architecture would support the future battle force capable combat system and allow the expansion necessary to accommodate evolutionary changes in both the threat environment and the technology then available to effectively counter that threat. Changes to the current Aegis computer architecture must be carefully and effectively managed such that the fleet will retain its combat readiness capability at all times. This paper describes a possible transition approach for evolving the current Aegis computer architecture to a general architecture for the future. The proposed computer systems architecture concepts encompass the use of combinations of physically distributed, microprocessor-based computers, collocated with the equipment they support or embedded within the equipment itself. They draw heavily on widely used and available industry standards, including instruction set architectures (ISAs), backplane busses, microprocessors, computer programming languages and development environments, and local area networks (LANs). In this proposal, LANs, based on fiber optics, will provide the interconnection to support system expandability, redundancy, and higher data throughput rates. A system of cross connected LANs will support a high level of combat system integration, spanning the major warfare areas, and will facilitate the coordination and development of a coherent multi-warfare tactical picture supporting the future combatant command st

关键词： computer Architecture

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Communication complexity in distributed algebraic computation

Communication complexity in distributed algebraic computatio...

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IEEE Conference on Decision and Control

作者： Z.-Q. Luo J.N. Tsitsiklis Laboratory of Information and Decision Systems Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA

Consideration is given to a situation in which two processors, P/sub 1/ and P/sub 2/, are to evaluate a collection of functions f/sub 1/, . . . f/sub s/ of two vector variables x, y under the assumption that processor P/sub 1/ (respectively, P/sub 2/) has access only to the value of the variable x (respectively, y) and the functional form of f/sub 1/,. . ., f/sub s/. Bounds on the communication complexity (the amount of information that has to be exchanged between the processors) are provided. An almost optimal bound is derived for the case of one-way communication when the functions are polynomials. Lower bounds for the case of two-way communication that improve on earlier bounds are also derived. As an application, the case in which x and y are n*n matrices and f(x,y) is a particular entry of the inverse of x+y is considered. Under a certain restriction on the class of allowed communication protocols, an Omega (n/sup 2/) lower bound is obtained. The results are based on certain tools from classical algebraic geometry and field extension theory.< >

关键词： Complexity theory distributed computing Laboratories computer science Polynomials Geometry Access protocols

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An efficient maximum entropy technique for 2-D isotropic random fields

An efficient maximum entropy technique for 2-D isotropic ran...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： A.H. Tewfik B.C. Levy A.S. Willsky Laboratory for Information and Decision Systems and The Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA

A novel linear maximum-entropy method (MEM) spectral-estimation algorithm for 2-D isotropic random fields is presented. This procedure differs from pervious 2-D MEM algorithms by the fact that maximum advantage is taken of the symmetries implied by isotropy. It is shown that the isotropic MEM problem has a linear solution and that it is equivalent to the problem of constructing the optimal linear filter for estimating the underlying isotropic field at a point on the boundary of a disk of radius R, given noisy measurements of the field inside the disk. A fast algorithm for computing the estimation filter is then used to obtain the MEM spectral estimate.< >

关键词： Entropy Motion estimation Nonlinear filters Information filtering Information filters Sonar applications Two dimensional displays Background noise distributed computing Physics computing

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ELECTRIC-FIELD GRADING USING THIN-FILM NONOHMIC ZINC-OXIDE

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IEEE TRANSACTIONS ON POWER DELIVERY 1987年第4期2卷 1164-1169页

作者： TORREY, DA KIRTLEY, JL Laboratory for Electromagnetic and Electronic Systems Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA

The transient response of thin film non Ohmic zinc oxide is studied to determine if the material would be able to keep up with power system abnormalities such as switching surges and lightning strokes. The transient model is based on a lumped parameter model of the distributed problem. It is found that the maximum electric field seen by the insulator was a function of film thickness, ground capacitance, and the characteristic time of the drive. It does not appear to be affected strongly by the internal capacitance of the film. The switching time of the film, being on the order of a nanosecond, does not appear to have an effect on transients of the time scale of lightning or line switching, indicating satisfactory film performance for sufficient thicknesses.

关键词： Transistors Zinc oxide Power system modeling Power system transients Lightning Transient response Surges Dielectrics and electrical insulation Capacitance-voltage characteristics Capacitance

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