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STRUCTURAL RELIABILITY ASSESSMENT WITH AMBIGUITY AND VAGUENESS IN FAILURE

NAVAL ENGINEERS JOURNAL 1992年第3期104卷 21-35页

作者： AYYUB, BM LAI, KL Bilal M. Ayyub:is currently an associate professor of civil engineering at the University of Maryland (College Park). He completed his B.S. degree in civil engineering in 1980 and completed both his M.S. (1981) and Ph.D. (1983) in civil engineering at the Georgia Institute of Technology. Dr. Ayyub has an extensive background in risk-based analysis and design simulation and construction engineering. He is engaged in research work involving structural reliability bridges marine structures and mathematical modeling using the theories of probability statistics and fuzzy sets. He has completed several research projects that were funded by the National Science Foundation the U.S. Coast Guard the U.S. Navy the Department of Defense the Maryland State Highway Administration the American Society of Mechanical Engineers and several engineering companies and other governmental agencies. Dr. Ayyub is a member of ASNE the American Society of Civil Engineers (ASCE) the American Concrete Institute (ACI) the American Society of Mechanical Engineers (ASME) the Society of Naval Architects and Marine Engineers (SNAME) the North American Fuzzy Information Processing Society (NAFIPS) the Committee on Reliability of offshore structures of ASCE and the Committee on Structural Safety of ACI. He is the author of about 150 publications in national and international journals conference proceedings and reports. Dr. Ayyub received the ASNE “Jimmie” Hamilton Award for 1985 the ASCE “Outstanding Research Oriented Paper” in the Journal of Water Resources Planning and Management for 1987 and the Edmund Friedman Award from ASCE in 1989. Kwan-Ling Lai:is currently a Ph.D. candidate of reliability engineering at the University of Maryland (College Park). She received her B.S. degree in civil engineering from National Taiwan University in 1986 and M.S. degree in civil engineering from the University of Maryland in 1989. Ms. Lai is a student member of the American Concrete Institute (ACI). She is engaged in the research work in

Engineering projects and designs are commonly developed in a systems framework that includes different types of uncertainty. In general, uncertainty can be of either the ambiguity or vagueness type. The theory of probability and statistics has been extensively used in engineering to deal with the ambiguity type of uncertainty. The theory of fuzzy sets and systems has been used to model the vagueness type of uncertainty in many engineering applications. In this paper, the role of fuzzy sets in engineering systems is described using a selected example area that deals with vagueness in failure definition as used in solving structural reliability problems. The reliability of a structure is commonly based on an explicit definition of failure, making structural reliability dependent on this definition. The vagueness in the perception of damage and failure introduces another class of uncertainty, in addition to the commonly realized and modeled class of uncertainty, i.e., ambiguity. In this study, a methodology for reliability assessment of structures based on a fuzzy definition of failure is developed. The significance of the contribution is in providing the reliability of the structure over a damage spectrum.

关键词： Failure Analysis

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APPLICATIONS OF SUPERCONDUCTIVITY TO VERY SHALLOW-WATER MINE SWEEPING

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NAVAL ENGINEERS JOURNAL 1992年第3期104卷 53-64页

作者： GOLDA, EM WALTERS, JD GREEN, GF LCdr. E. Michael Golda:is a Naval Reserve engineering duty officer. He has provided direct support to code 2712 at the David Taylor Research Center during the last eighteen months as a member of the group studying applications of superconductivity to mine countermeasures. LCdr. Golda received his Ph.D. and M.S. in materials science and engineering from Stevens Institute of Technology Hoboken N.J. A 1977 graduate of the United States Naval Academy LCdr. Golda has been a member of ASNE since 1974. Dr. Joseph D. Walters:received his Ph.D. in physics in 1990 from Portland State University in Portland Oregon. At the University Dr. Walters work included experimental and theoretical investigations of critical heat transfer phenomena in liquid helium and theoretical research into the finite time thermodynamics of refrigeration cycles. Currently Dr. Walters is a project engineer in the cryogenic engineering group at the David Taylor Research Cen-ter(DTRC) in Annapolis Maryland. Since joining DTRC in 1990 Dr. Walters has been assessing cryogenic related issues impacting superconductivity applied to mine countermeasures including choice of superconductor refrigerator system mass and logistical arrangements. Additionally Dr. Walters is developing theoretical models designs and testing a set of high critical temperature superconducting current leads for SMES. Geoffrey F. Green:is the cryogenic engineering group leader at the David Taylor Research Center(DTRC) in Annapolis Maryland. He received his B.S. and M.S. in mechanical engineering from Pennsylvania State University in 1970 and 1972 respectively. Since then Mr. Green has worked at DTRC on the development of a superconducting electric drive system for Navy Ships. In 1980 he assumed responsibility for development of the cryogenic and machinery cooling technologies. Mr. Green has co-authored more than 25 papers/reports in cryogenic refrigeration and superconducting machinery and has several patents in cryogenics. He is on the executive committee of the P

Recent experiences in the Persian Gulf have clearly demonstrated the need for improved mine sweeping, or mine counter-measures (MCM), to support amphibious operations. Characteristics of MCM systems currently used to counter magnetic influence mines restrict sweep rates, limit the ability to accurately simulate a ship's magnetic signature, and require a minimum water depth. Advances in superconducting technology over the last twenty years have significantly increased the feasibility of superconducting mine countermeasures (SCMCM) for magnetic influence mines. An SCMCM system would be small, light, and simple compared to currently deployed MCM systems. Superconducting magnets could be fabricated in steady state configurations or configurations that would significantly improve the ability to simulate non-symmetric, time-varying magnetic signatures of ships. SCMCM systems could be deployed from either surface or airborne platforms. An airborne system would protect the magnet from blast damage, permit the highest sweep rates, and allow unrestricted sweeping over entire amphibious objective areas, including the surf. A light weight SCMCM system would permit use of additional airborne platforms which may include remotely piloted airborne vehicles. Remotely piloted surface or airborne vehicles would totally eliminate risks to personnel. An SCMCM system could be demonstrated immediately utilizing existing technology and may offer significant advantages over existing MCM systems used to counter magnetic influence mines in very shallow water.

关键词： Military Engineering

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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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ESTIMATION OF STRUCTURAL SERVICE LIFE OF SHIPS

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NAVAL ENGINEERS JOURNAL 1989年第3期101卷 156-166页

作者： AYYUB, BM WHITE, GJ PURCELL, ES P.E. Bilal M. Ayyub:is currently an associate professor of civil engineering at the University of Maryland. He received his B.S. degree in civil engineering from the University of Kuwait in 1980. He completed both his M.S. (1981) and Ph.D. (1983) in civil engineering at the Georgia Institute of Technology. Dr. Ayyub has an extensive background in risk-based analysis and design simulation and construction engineering. He is engaged in research work involving structural reliability bridges marine structures and mathematical modeling using the theories of probability statistics and fuzzy sets. His research work is sponsored by the National Transportation Safety Board the National Science Foundation the U.S. Coast Guard the State of Maryland and the University of Maryland. Dr. Ayyub is a member of ASNE the American Society of Civil Engineers (ASCE) the American Concrete Institute (ACI) the Committee on Forensic Engineering of ASCE and the Committee on Structural Safety of ACI. He is the author of more than three dozen publications in national and international journals conference proceedings and reports. Dr. Ayyub received the ASNE “Jimmie” Hamilton Award for 1985 and the ASCE “Outstanding Research Oriented Paper” in the Journal of Water Resources Planning and Management for 1987. Gregory J. White:is an associate professor of naval architecture at the U.S. Naval Academy. He received his B.S. degree in engineering mechanics from Vanderbilt University in 1975 an M.E. degree in naval architecture from the University of California Berkeley in 1981 and a Ph.D. in civil engineering (structures) from the University of Maryland in 1986. Dr. White served on active duty with the U.S. Navy from 1975 to 1979 as a junior officer in the engineering and operations departments of Pacific Fleet destroyers. Prior to coming to the Naval Academy he worked at Mare Island Naval Shipyard in the scientific code and in the R&D division of Exxon International Company's Tanker Department. Dr. White is a lieutenant commande

A methodology for the structural life assessment of a ship's structure is suggested. The methodology is based on probabilistic analysis using reliability concepts and the statistics of extremes. In this approach, the estimation of structural life expectancy is based on selected failure modes. All possible failure modes of the ship must be investigated and the most likely paths to structural failure identified. For the purpose of illustration two failure modes are considered in this study. They are plate plastic deformation and fatigue cracking. Structural life based on these two failure modes is determined for an example vessel. The methodology determines the probability of failure of the ship's structural components according to the identified failure modes as a function of time. The results can be interpreted as the cumulative probability distribution function (CDF) of structural life. Due to the unknown level of statistical correlation between failure modes, limits or bounds on the CDF of the structural life are established. The limits correspond to the extreme cases of fully correlated and independent failure modes. The CDFs of structural life are determined for two inspection strategies; namely, inspection every year and inspection every two years with a warranty inspection at the end of the first year. The meaning of the results for the case investigated in this study is that, for example, given an inspection strategy of two years and a desired life of 15 years, there is a 72% chance that the vessel will not experience enough partial damage‘ in the failure modes identified to constitute reaching the “end of structural life” as defined.

关键词： Ships

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RELIABILITY-BASED FATIGUE DESIGN FOR SHIP STRUCTURES

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NAVAL ENGINEERS JOURNAL 1987年第3期99卷 135-149页

作者： WHITE, GJ AYYUB, BM Gregory J. White: LCdr. USNR-R is an assistant professor of naval architecture at the U.S. Naval Academy. He received a B. S. degree in engineering mechanics from Vanderbilt University in 1975 an M. E. degree in naval architecture from the University of California Berkeley in 1981 and a Ph.D. from the University of Maryland in 1986. Dr. White served on active duty with the U.S. Navy from 1975 to 1979 first as the damage control assistant aboard the USS Reasoner (FF-1063) and then as the commissioning CIC officer aboard the USS Merrill (DD-976). After leaving active duty and while attending graduate school he worked at Mare Island Naval Shipyard in the scientific section (Code 250.1). Upon completion of graduate school he then worked for Exxon International Company as a research engineer in the R & D division of the tanker department. A lieutenant commander in the Ready Reserve Dr. White drills with the repair department of a submarine tender reserve unit and recently completed the reserve engineering duty officer qualification program. A member of ASNE since 1983 Dr. White is also a member of SNAME and the U.S. Naval Institute Dr. White received the “Jimmie” Hamilton Award for 1985. Bilal M. Ayyub:is currently an assistant professor of civil engineering at the University of Maryland. He received his B. S. degree in civil engineering from the University of Kuwait in 1980. He completed both his M. S. (1981) and Ph.D. (1983) in civil engineering at the Georgia Institute of Technology. While there he was awarded the Kuwait Foundation for the Advancement of Science Fellowship. Dr. Ayyub has extensive background in risk-based analysis and design simulation pre-stressed composite steel girders and construction engineering. He is engaged in research work involving structural reliability bridges marine structures mathematical modelling using the theories of probability statistics and fuzzy sets. His research work is sponsored by the National Transportation Safety Board the University of Maryland the Natio

In the continuing effort to apply reliability methods to marine structures, the next logical step is to include these techniques in the design process. The advantage of doing this would be the ability to design more efficient structures with some measure of certainty of the reliability level involved. The particular application in ship structural design which would benefit the most from using reliability methods is the design against fatigue failure. In this paper, some of the reliability-based methods currently being used (or proposed for use) in the design of structures against fatigue are examined. Each is evaluated as to its suitability for use in the structural design of ships. In addition, the authors propose a new reliability-based fatigue design format which is based on their recently introduced Reliability-Conditioned (RC) design method and the Load and Resistance Factor Design (LRFD) code format. This approach is hoped to provide the design engineer with an easy to understand and use tool based on the LRFD format. The RC method will enable him to quickly and accurately design the components of a ship's structure such that a desired level of safety against fatigue is achieved. Each of the methods discussed is used to solve a practical example. The results of that example and several others are used to discuss the relative merits of each method.

关键词： SHIPS

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A FIBER OPTIC-SYSTEM FOR DAMAGE ASSESSMENT OF FRP COMPOSITE STRUCTURES

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NAVAL ENGINEERS JOURNAL 1984年第6期96卷 52-56页

作者： CRANE, RM MACANDER, AB Roger M. Crane:isa materials engineer in the Ship Materials Engineering Department of the David W. Taylor Naval Ship Research and Development Center (DTNSRDC) Annapolis Md. He is presently involved in the development of fiber reinforced advanced composite materials for various naval applications. He received his B.S. degree in physics/engineering and his B.A. degree in mathematics: physical applications from Loyola College. He has finished his course work for his M.S. degree in materials science at the University of Delaware and is currently enrolled at the Johns Hopkins University. Mr. Crane is a member of Society of Experimental Stress Analysis and the Society of Physics Students. Aleksander B. Macander:is a materials engineer in the Ship Materials Engineering Department DTNSRDC Annapolis Md. He is presently involved in the development of fiber reinforced advanced composite materials for various naval applications. Prior to joining DTNSRDC in 1973 he was associated with the Johns-Manville Corporation Denver Colo and also with the Naval Applied Science Laboratory Brooklyn N.Y. He received his B.S. degree in mechanical engineering from Fairleigh Dickinson University and his M.S. degree in mechanical engineering (plastics) from Stevens Institute of Technology. Mr. Macander is a member of ASTM the Severn Technical Society and the International Organization for Standardization/Technical Committee 61 on Plastics.

There are a limited number of nondestructive techniques available for field inspection of large composite structures and practically none for inservice inspection. An innovative damage assessment system is proposed which uses an optical fiber mesh implanted into the body of a fiber reinforced composite structure. This mesh would become an integral part of the structure on fabrication. The selection of the mesh fibers would be predicated on their strain to failure characteristics and strain compatibility with the base composite reinforcing fibers. This optical system will be capable of locating damage, assessing severity and monitoring damage growth. A successful implementation of the total damage assessment system would involve the interaction of the optical fiber mesh with an adequately designed interrogative electronic package. This paper focuses on the former aspect of the total system. It will address some recent experimental work showing the practicality of the concept for large, complex composite structure.

关键词： FIBER OPTICS

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CURRENT TRENDS IN NAVAL DATA HANDLING SYSTEMS

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NAVAL ENGINEERS JOURNAL 1984年第3期96卷 128-141页

作者： WAPNER, M FASTRING, R Martin Wapner:graduated from the City College of New York from which he received both his bachelor and masters degrees in electrical engineering. He joined the Naval Applied Science Laboratory in 1961 where he served as project engineer for ship inertial navigation systems (SINS) and related equipments. Since 1967 he has been employed by the Naval Sea Systems Command initially as Navigation and Interior Communications Programs Manager in the Research Directorate and currently as Director Combat Systems Engineering Research and Technology Office in the Combat Systems Directorate. He has been responsible for the development of the Shipboard Data Multiplex System (SDMS) the Electrically Suspended Gyro Navigator (ESGN) the Doppler Sonar Velocity Log (DSVL) and directs other technology programs in the area of command and control and related command support functions. He has directed programs to evaluate foreign data bus and distributed processor technology for potential application to U.S. requirements and is active in a number of U.S. government and foreign government information exchange programs. He has authored numerous technical papers and is a member of the Institute of Electrical and Electronic Engineers American Society of Naval Engineers and the Institute of Navigation. Richard A. Fastring:graduated from Tulane University with a B.S.E.E. and did graduate work in systems engineering and operations research at the University of Pennsylvania. He joined RCA's surface communications systems engineering staff in 1959 where he contributed to a number of Navy and Air Force communication system programs. Since 1971 he has been with SEMCOR Inc. where he has been involved with the Navy's Shipboard Data Multiplex System (SDMS) and related data transfer programs. Mr. Fastring has served on information exchange standardization committees such as the A2K Avionics Multiplexing Committee of the Society of Automotive Engineers and Subgroup 6 (Compatibility of Naval Data Handling Equipments) of the NA TO Industrial Adviso

The hardwired point to point cabling that has been the mainstay of data handling on naval ships is slowly but surely giving way to more advanced techniques that include data bussing and high speed switching networks. The U.S. Navy's AN/USQ-82(V) Shipboard Data Multiplex System (SDMS) is now installed and operating for technical and operational evaluation purposes on USS Oldendorf , a DD 963 class destroyer. The distributed switching system “SITACS” introduced at ASNE Day 1982 has now been breadboarded. In the foreign arena, NATO standard bus and network interfaces are being implemented in Norwegian, United Kingdom and Canadian shipboard systems. These developments are reviewed, and projections are made regarding future trends in naval data handling systems.

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WARNING - SCREENING workERS FOR GENETIC RISK

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HASTINGS CENTER REPORT 1983年第1期13卷 5-8页

作者： MURRAY, TH Thomas H. Murrayis associate for social and behavioral studies at The Hastings Center. This article is based on testimony before the Subcommittee on Investigations and Oversight of the Committee on Science and Technology U.S. House of Representatives on October 6 1982 chaired by Congressman Albert Gore Jr. Work on the issue was supported by the National Science Foundation and the National Endowment for the Humanities through the NSF's program on Ethics and Values in Science and Technology for a project on “Ethics and Values in the Use of Occupational Health Technologies” Grant No. ISP-8107018. Additional support for this work has come from the Field Foundation and the March of Dimes Birth Defects Foundation.

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EMERGING ROLES OF NIH AND EPA IN THE REGULATION OF RDNA technology

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BIO-technology 1983年第9期1卷 757-768页

作者： KORWEK, EL Edward L. Korwek Ph.D. J.D. is associated with the law offices of Keller and Heckman 1150 17th St. N.W. Washington D.C. 20036.REFERENCES Committee on Recombinant DNA "Potential Biohazards of Recombinant DNA Molecules" Nature250: 175 (1974) Proc. Nat. Acad. Sci.71: 2593 (1974) Science185: 303 (1974).|Article|Fed. Regist.48: 24556 (1983).Milewski E. Editor's Note. Recombinant DNA Tech. Bull.4: i (1981).Inside EPA 4 1 (1983). EPA has already held a meeting and published a draft report on the subject of its regulation of this area under the TSCA. EPA "Administrator's Toxic Substances Advisory Committee Meeting" Fed. Regist.48: 8342 (1983) Regulation of Genetically Engineered Substances Under TSCA Chemical Control Division Office of Toxic Substances Office of Pesticides and Toxic Substances Environmental Protection Agency Washington D.C. (March 1982). Congress also recently held a hearing on the subject of existing federal authority over the release of R-DNA-containing organisms into environment. M. Sun Science221: 136 (1983).Sects. 2-30 15 U.S. Code sects. 2601-2629 (1976 and Supp. V 1981). Hereinafter all references in the text to TSCA refer to the section numbers as enacted and not to the corresponding U.S. Code sections.The Administrative Procedure Act specifically states that the reviewing court shall "hold unlawful and set aside agency action findings and conclusions found to be hellip in excess of statutory jurisdiction authority or limitations or short of statutory right. hellip " 5 U.S. Code sect. 706(2)(C) (1976).PHS Act 42 U.S. Code sects. 217a and 241 (1976) Charter Recombinant DNA Advisory Committee Department of Health and Human Services (1982).Korwek E. Food Drug and Cosm. L. J.35: 633 (1980) p. 636.Although DHHS has some authority under Section 361 of the PHS Act to regulate R-DNA materials that cause human disease and are communicable most types of experimentation would not fall into this category. Because of this limitation the Sub committee of the Federal

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AN APPROACH TO AN EVOLUTIONARY IMPLEMENTATION OF SHIPBOARD DISTRIBUTED-PROCESSING

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NAVAL ENGINEERS JOURNAL 1982年第2期94卷 39-49页

作者： FASTRING, RA WAPNER, M Richard A. Fastring:graduated from Tulane University with a B.S.E.E. and did graduate work in Systems Engineering and Operations Research at the University of Pennsylvania. He joined RCA's Surface Communications Systems Engineering Staff in 1959 where he contributed to a number of Navy and Air Force communication system programs. Since 1971 he has been with SEMCOR Inc. where he has been involved with the Navy's Shipboard Data Multiplex System (SDMS) and related data transfer programs. Mr. Fastring has served on information exchange standardization committees such as the A2K Avionics Multiplexing Committee of the Society of Automotive Engineers and Subgroup 6 (Compatibility of Naval Data Handling Equipments) of the NATO Industrial Advisory Group. Martin Wapner:graduated from the City College of New York from which he received both his Bachelor and Masters degrees in Electrical Engineering. He joined the Naval Applied Science Laboratory in 1961 where he served as Project Engineer for Ship Inertial Navigation Systems (SINS) and related equipments. Since 1967 he has been employed by the Naval Sea Systems Command initially as Navigation and Interior Communications Programs Manager in the Research Directorate and currently as Director Combat Systems Engineering Research and Technology Office in the Combat Systems Directorate. He has been responsible for the development of the Shipboard Data Multiplex System (SDMS) the Electrically Suspended Gyro Navigator (ESGN) and the Doppler Sonar Velocity Log (DSVL) and directs other technology programs in the area of Command and Control and related command support functions. He has directed programs to evaluate foreign data bus and distributed processor technology for potential application to U.S. requirements and is active in a number of U.S. government and foreign government information exchange programs. He has authored numerous technical papers and is a Senior Member of the Institute of Electrical and Electronic Engineers.

Traditional thinking regarding the data transfer vehicle needed to interconnect elements of a distributed processing combat system generally envisions one or more data busses. This paper presents the somewhat unorthodox viewpoint that a distributed switching network is a better transition vehicle for moving from today's federated architectures to the distributed-processing architectures of the future. The structure and operation of a distributed switching network concept, called Standard Information Transfer Architecture for Combat Systems (SITACS), is briefly described. Simulation results are presented which show throughput and timing values considerably better than that achievable by data bus systems.

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