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HYBRID sATELLITE AND TERREsTRIAL NETWORKs

INTERNATIONAL JOURNAL OF sATELLITE COMMUNICATIONs 1994年第3期12卷 313-327页

作者： CHITRE, DM sHYY, DJ EPHREMIDEs, A GUPTA, s COMSAT Laboratories 22300 Comsat Drive Clarksburg MD 20871–9475 USA. Received his B.Sc. from the University of Bombay India an M.A. in mathematics from the University of Cambridge U.K. and a Ph.D. in physics from the University of Maryland. He is currently an Associate Executive Director of the Network Technology Division at COMSAT Laboratories. He has been involved in research and development activities in ISDN VSAT networks data communications and network systems and architectures. Prior to his current positions Dr. Chitre was a Principal Scientist in the Network Technology Division at COMSAT Laboratories. Dr. Chitre joined COMSAT Laboratories in 1980. He has made major contributions to the analysis and architecture of data communication ISDN and BISDN via satellite. Dr. Chitre directs and participates in the international and national standards activities in ISDN BISDN and data communication as they apply to satellite communication. He was Chairman of the Working Group on Protocols and Network Timing Function of the CCIR/CCITT Joint Ad Hoc Group on ISDN/Satellite Matters during 1990–1992. Currently he is the Chairman of the Working Group on New Technologies in the ITU Intersector Coordinating Group (ICG) on Satellite Matters. Dr. Chitre was a programme manager during 1990 and 1991 on a contract from INTELSAT on systems studies on satellite communications systems architectures for ISDN and broadband ISDN systems. Currently he is the technical manager of the DoD Contract on ATM via satellite demonstration and the programme manager for the INTELSAT contract on analysis and top-level specification of INTELSAT ISDN subnetworks and SDH compatible transport network. Received the B.S. degree in electrical engineering from national Chiao-Tung University Hsin-Chu Taiwan in 1983 and the M.S. and Ph.D. degrees in electrical engineering from Georgia Institute of Technology Atlanta GA in 1986 and 1990 respectively. From June 1987 to October 1987 he worked for the Department of Neurology Emory Univers

The role of satellite communications in networks that provide new services, such as frame relay and multimedia, is investigated. Both passive and active (on-board switching/processing) satellite systems are considered. Novel techniques are developed for each system to demonstrate, via detailed analysis and simulation, how the communications bandwidth agility of multipoint/broadcast satellite channels, and the on-board switching/processing, makes it feasible to provide these new services via hybrid satellite and terrestrial networks in a resource-efficient manner.

关键词： HYBRID NETWORKs ON-BOARD PROCEssING FRAME RELAY

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FUEL-CELL POWER-PLANTs FOR sURFACE FLEET APPLICATIONs

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NAVAL ENGINEERs JOURNAL 1994年第3期106卷 59-76页

作者： GOUBAULT, P GREENBERG, M HEIDENREICH, T WOERNER, J Philippe Goubault:graduated in 1983 from the “Ecole Nationale Superieure de Techniques Avancees” in Paris with a major in naval architecture. After one year of military service with the French navy he worked as naval architect and program director for the French navy between 1984 and 1988. He was in charge of the development of AGNES200 Surface Effect Ship design which completed its sea trials in 1992. He also was responsible for the construction of five ships (four hydrographic vessels and one experimental MCM vessel) which entered service between 1988 and 1991. He has been involved in a number of projects and studies for the U.S. Navy U.S. Coast Guard and other foreign and domestic customers. At Band Lavis & Associates Inc. Mr. Goubault has expanded the computer tools used to conduct parametric analysis of advanced hullforms and has developed cost-effectiveness assessment tools and methodologies for both commercial and military ships. Mr. Goubault is a member of ASNE. Marc Greenberg:is employed as a cost analyst at the cost and economic analysis branch systems assessment and engineering division Naval Surface Warfare Center. He provides cost estimates and analyses of Navy ship and submarine technologies and has assisted in the development of parametric cost models since 1991. Employed as an electronics engineer by the U.S. Army Information Systems Command from 1989 to 1991 he provided support in simulation design and construction of high frequency and microwave communication systems. Mr. Greenberg received his BS degree in ceramic science and engineering from the Pennsylvania State University May 1987. He is a member of MORS. Todd Heidenreich:is employed in the design analysis and tools branch systems assessment and engineering division of the Carde-rock Division Naval Surface Warfare Center. He is involved as a project naval architect in the conceptual design of future surface ship designs future technology impact assessments and the assessment of current domestic and foreign surface ship desig

This paper describes the results of a study undertaken to determine the impact of fuel cell technology on the design and effectiveness of future naval surface combatants. The study involved the collection of data to characterize four different fuel cell technologies: proton exchange membrane, molten carbonate, phosphoric acid, and solid oxide fuel cells. This information was used to expand current computer models to develop specific fuel cell plants that met the power requirements for several applications on a nominal 5000 Lton destroyer and a nominal 2000 Lton corvette. Each of the fuel cell technologies was incorporated into several applications aboard the destroyer and the corvette. These applications included combinations of centralized and distributed ship service power, and propulsion power. In addition, the impact of fuel cell technology was determined for a ship service power backfit option aboard a DDG-51 class destroyer. The results of the impact on the ship designs were analyzed and a military effectiveness assessment was conducted to address such issues as the impact of fuel cells on mobility, survivability, affordability, and on the environment. The paper identifies which aspects of the fuel cell technologies have the greatest impact upon the ship designs and their operational costs. Recommendations are given for future technology development efforts required to make fuel cells suitable for Navy service.

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sTATIsTICAL QUALITY-CONTROL AND NAVY sHIP REPAIR

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NAVAL ENGINEERs JOURNAL 1993年第1期105卷 59-65页

作者： sTIMsON, WA The Author:received his B.S. degree in mathematics from the University of Texas at El Paso in 1964 and his M.S. degree in engineering from the University of Santa Clara in 1971. Mr. Stimson was employed in the aerospace industry for ten years then joined the Naval Ship Weapon Systems Engineering Station (NSWSES) in Port Hueneme Calif. in 1973. At NSWSES he served ten years as a project supervisor on Ship Qualification Trials and seven years as program manager of the Master Ordnance Repair program. Today Mr. Stimson lives in Charlotteville Va. and is a Ph.D. candidate in systems engineering at the University of Virginia majoring in quality management and statistical quality control.

since the end of the Cold War, there have been demands in the United states to step down defense costs. One effect of these demands is a shift in accent within the U.s. Navy from acquisition to maintenance in order to make ships and ship systems last longer. Inevitably, this will mean more work for the ship repair industry, public and private. At the same time, the Navy is concerned about quality improvement in its industrial base and is encouraging the use of strategies generally known as Total Quality Management. However, the characteristics of Navy ship repair challenge many of the TQM methods that work so well in manufacturing. Government contracts restrict such quality strategies as single sourcing and just-in-time inventory. Government quality assurance requirements rely heavily upon final inspection. Navy business methods such as fragmentation of the work package among independent performers and constant and universal interface between customer and performer impede cohesive control. Finally, Navy ship repair, unlike the automaton factory, requires labor intensive, high skill, non-rote craftsmanship across many thousands of low volume activities. The quality objective is this: to measure, control, and improve the processes of ship repair in order to reduce variation from target values and to provide customer satisfaction. This can be done through statistical process control adapted to job shop operation. This paper describes how sQC methods can be applied to production, logistics, quality control, and test programs in order to control the critical path and quantify the quality character of the shipyard. Control is maintained through a closed loop management model which uses key state variables for process measurement. Quality is determined by characteristic curves and quantified by process control limits.

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QUALITY MANAGEMENT AND master ORDNANCE REPAIR

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NAVAL ENGINEERs JOURNAL 1993年第5期105卷 68-76页

作者： sTIMsON, WA MARTINEZ, E William A. Stimson:received his B.S. degree in mathematics from the University of Texas at El Paso in 1964 and his M.S. degree in engineering from the University of Santa Clara in 1971. Mr. Stimson was employed in the aerospace industry for ten years then joined the Naval Ship Weapon Systems Engineering Station in Port Hueneme Calif in 1973. At NSWSES he served ten years as a ship qualification trials project supervisor and seven years as program manager of the Master Ordnance Repair Program. Today Mr. Stimson lives in Charlottesville Va. and is a Ph.D candidate in systems engineering at the University of Virginia majoring in quality management and statistical quality control. Ernest Martinez:received his B.S. degree in computer sciences from National University in 1985. Mr. Martinez was head of combat systems at the Naval Ship Repair Facility Yokosuka Japan for five years returning in 1983 to the Naval Sea Support Center Pacific San Diego Calif. During the next five years he managed the Fleet Modernization Program and was coordinator of the Combat System Readiness Test Program. Today Mr. Martinez lives in San Diego and is employed by the Naval Surface Warfare Center Port Hueneme Calif. as MOR program manager.

Because of the redefinition of national defense needs and the reduction of defense budgets, the management of complex combatant repair is more imperative than ever. To this end, the U.s. Navy is calling for Total Quality Leadership (TQL) strategies from its agencies and contractors. These strategies are derived from well known initiatives of quality management, such as those of Deming. They define the basis of any quality program. Quality methodologies have proven highly effective in the manufacturing sector, but many remain unproven or tentative in service and repair industries. The authors believe that TQL methods can be effective in the repair industry also, but must be developed or adapted to suit the unique characteristics of that industry: high skill, non-rote crafts, with continual customer interface at all levels of operation. In establishing a direction for TQL development, the authors have chosen two elements. The first is the Malcolm Baldrige Quality Improvement program, which provides guidelines for direction. The second is the master Ordnance Repair (MOR) program, which provides the management vehicle. From its beginning in 1983, MOR has been a program of management. The task is explicit in its charter, NAVsEAINsT 8000.2, which requires that a MOR contractor manage combat system work and testing. Quality management methods are applied to the MOR program to achieve MOR objectives using Baldrige measurements. Methods are presented which deploy the quality function across the organization. Techniques are provided to improve the company's ability to control its processes and the robustness of its product. These include methods of process analysis that determine added value, ownership, and internal customer. stress is placed on in-process verification rather than on end-of-process inspection. The recommendations of this paper require no extraordinary skills or costs, but do require a formal and systematic approach to quality issues. The authors believe that

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BEsT VALUE CONTRACTING

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NAVAL ENGINEERs JOURNAL 1993年第6期105卷 59-68页

作者： ZACKs, MR DEMAs, TA Michael R. Zacks:attended Massachusetts Maritime Academy and received his bachelor of science in marine engineering degree in 1985. He is currently enrolled at the University of Maryland where he is working on a master's degree in general administration/financial management. Mr. Zacks is the assistant project manager for the Coastal Living Marine Resource Vessels in the National Oceanic Atmospheric Administration's (NOAA) Fleet Modernization and Replacement Program Office. His current responsibilities encompass providing technical and management support for the procurement construction testing and delivery of these ships. His previous jobs included working for the Naval Sea Systems Command's (NavSea) Combat Support Ocean Research and Surveillance Program Office (PMS 383) Ship Design and Engineering Directorate's Surface Launched Weapons Branch (56W3) and Research Analysis and Management (RAM) Corporation. Thomas A. Demas:received a bachelor of science degree in civil engineering from Old Dominion University and a master's degree in business administration from Averett College. He is a recent graduate from the NavSea Commander's Development Program (CDP). Mr. Demas is the assistant project manager for the AGOR-23 24 25 and National Oceanic and Atmospheric Administration's oceanographic research ships in NavSea's Combat Support Ocean Research and Surveillance Program Office. While participating in the CDP Mr. Demas worked in the following offices: OpNav OP321 as a FMP action officer CincPacFlt N43 as a maintenance officer ASN(RD&A) as director of maintenance and modernization and NavSea 56W14 as a branch head of closures and outfitting branch. Prior to the CDP he held a position with the Gas Turbine Surface Combatant Program Office as the West Coast project manager for DD-963 class destroyers. Before working for NavSea Mr. Demas was employed as a junior engineer with TRACOR and C-CUBED Corporation. His responsibilities included providing general systems engineering support to NavSea and the Nava

The best value concept is based on making decisions on an offeror's technical competence, proven past performance, management capability, life-cycle costs, and product quality. The evaluation of these factors should be structured to ensure consideration is given to determine the overall benefit associated with the offered price. This paper advocates using the best value concept as the method for developing and rating proposal evaluation factors for the procurement of new ships. It discusses methods for establishing evaluation factors, developing standards to evaluate, associated documentation, and weighting and scoring the factors. The information for this paper was obtained from personal interviews, hands-on experience developing and evaluating best value proposals, and documentation research. If properly executed, the best value concept will enable the Navy to improve ships while reducing operating costs.

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UNDERWATER INsPECTION FOR WELDING AND OVERHAUL

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NAVAL ENGINEERs JOURNAL 1993年第5期105卷 37-42页

作者： MITTLEMAN, J sWAN, L John Mittleman:is a mechanical engineer at the Naval Surface Warfare Center Dahlgren Division Coastal Systems Station in Panama City Florida. His Primary Responsibilities are in the development of underwater nondestructive testing equipment for use by fleet divers and inspectors. He also performs research in the characterization of metal microstructure through ultrasonic scattering measurements. Mr. Mittleman received his BS from Cornell University in 1969 and science master's in ocean engineering from the Massachusetts Institute of Technology in 1970. His research currently supports doctoral studies with Iowa State University. Mr. Mittleman received the American Society of Naval Engineer's Solberg Award in 1981 for his contributions to underwater ship hull inspection. Mr. Mittleman is a member of ASNE ASNT ASTM IoD Sigma Xi Tau Beta Pi and Phi Kappa Phi. Lisa Swan:is a mechanical engineer at the Naval Surface Warfare Center in Panama City Florida. She is involved in nondestructive testing engineering primarily in the underwater arena. Ms. Swan holds a bachelor of science in materials engineering from North Carolina State University. She is a graduate of the Federal Women's Executive Leadership Program. Ms. Swan is a member of ASNT.

significant progress has been made in making underwater ultrasonic thickness gauging and magnetic particle inspections available to the fleet. Under sponsorship from the Naval sea systems Command, Director of Ocean engineering, Underwater ship Husbandry Division (Navsea 00C5), the Coastal systems station has developed complete hardware packages supporting these two nondestructive test methods, and has introduced them to military inspectors at a shore intermediate maintenance activity, a destroyer tender, and a naval shipyard. Performance trials conducted prior to taking the systems to the field have been accepted by Navsea, ships' Concepts Group, Materials subgroup, Metals Division (Navsea 5142) as evidence that these inspections can reliably be performed underwater. Avenues for certifying specially trained divers and inspectors are being developed;for the first time the Navy will have all of the elements in place for underwater inspections satisfying the requirements of Mil-std-271 (Requirements for Nondestructive Testing Methods) and the Naval ships' Technical Manual Chapter 074. Underwater ultrasonic thickness gauging has also been slated for use in the fleet, as data from laboratory and field trials have consistently shown that reliable results can be obtained by a team comprising a certified topside inspector and a diver. In tests performed at the ship Repair Facility (sRF), Yokosuka, underwater readings were compared to those taken in dry dock by sRF inspectors, and independently by contract inspectors. On the basis of approximately 800 locations, differences between the data sets were found to be randomly distributed, with a standard deviation on the order of 0.02''. This level of accuracy is largely sufficient to distinguish plate which will need replacement during overhaul, or plate which is thick enough to weld on.

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AsNE LUNCHEON ADDREss

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NAVAL ENGINEERs JOURNAL 1993年第4期105卷 48-52页

作者： BOWEs, WC COMMANDER NAVAL AIR SYSTEMS COMMAND Admiral William Bowes: a native of New York graduated from the University of Idaho and its NROTC Regular Program in June of 1963. He is a 1968 graduate of the United States Naval Test Pilot School and received his master's degree in systems acquisition management from the Naval Postgraduate School in March 1974. Upon receiving his wings in December 1964 he joined the light attack community at the Naval Air Station Lemoore California. He served on combat missions from the Kitty Hawk (CV-63) Enterprise (CVN-65) and Coral Sea (CV-43). Vice Admiral Bowes flew 350 combat missions in Southeast Asia between 1965 and 1972. An experienced test pilot Admiral Bowes has had three tours at the Naval Air Test Center Patuxent River Maryland. Having piloted every jet aircraft that has been in the fleet since the 1960s he has flown more than 5000 hours in over 50 different U.S. and foreign military aircraft. He is an associate fellow in the Society of Experimental Test Pilots. Admiral Bowes began his program management experience in January 1980 in the Naval Air Systems Command as the F/A-18 assistant program manager for systems and engineering. In December 1983 he was assigned as the F-14 aircraft and Phoenix missile system program manager. He managed the Phoenix missile system until June 1985 and the F-14 until November 1987. During that tour of duty the F-14A (PLUS) was delivered to the Navy. He was promoted to rear admiral in November 1987 at which time he was assigned as the director Cruise Missiles Project. In May 1988 he became the first director of the Unmanned Aerial Vehicles Joint Project. In March 1991 Vice Admiral Bowes became the commander of the Naval Air Systems Command. His decorations include the distinguished service medal 3 Legions of Merit 3 Distinguished Flying Crosses 36 Air Medals 2 individual awards 8 Navy Commendation Medals the Vietnamese Air Gallantry Cross and various unit commendations and campaign medals.

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TOMAHAWK NITROGEN PREssURIZATION MAINTENANCE - WHY

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NAVAL ENGINEERs JOURNAL 1993年第2期105卷 66-68页

作者： CIARULA, TA NERADKA, VF Cdr. Thomas A. Ciarula: USN was born in Pottstown Pa. He attended Northrop University in Inglewood Calif. where he earned a bachelor of science degree in aircraft maintenance engineering in September 1971. He was selected for Officer Candidate School where he was commissioned an ensign (Aeronautical Maintenance Duty) in August 1972. Cdr. Ciarula has been assigned to VA-37 The AIMD at NAF Kadena Okinawa Japan VXE-6 and the USS Forrestal. He was the wing maintenance for training officer for Air Wing Three at NAS Chase Field in Beeville Tex. and the AIMD officer at NAS Key West Fla. In 1988 Cdr. Ciarula was assigned to the Cruise Missiles Project (PEO-CU) where he was the TASM class desk officer and the director of logistics. While at the Cruise Missiles Project he was awarded his master of science in general administration from Central Michigan University. He is currently assigned to PMA-205 in the Naval Air Systems Command. Vincent F. Neradka:received B.S. and M.S. degrees from the University of Maryland in aerospace engineering in 1964 and 1969 and an MS in technical management from the Johns Hopkins University in 1986. He joined the Johns Hopkins University Applied Physics Laboratory in 1979 working on the Vertical Launching System of the Aegis cruisers. Since that time he has participated in activities on the Phalanx program the SPS-48E radar and long term involvement with the Cruise Missile Program. On the Cruise Missile Program Mr. Neradka has focused on the specification of and testing related to environments. Simulation activities have included modeling of pneumatic systems and NASTRAN dynamic modeling. Mr. Neradka is a registered professional engineer.

This paper discusses the data that were recorded during a three-month accelerated humidity test of two Tomahawk all-up rounds (AURs), one pressurized with dry nitrogen in accordance with the current practice, and the other left unpressurized. Temperature and humidity were recorded inside the canisters and missiles. Data analysis consisted of psychrometric calculations to determine the moisture intrusion into these missiles during the test. The work was carried out in support of a technical effort directed at changing the storage and stowage environmental protection of the Tomahawk missile.

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FFG-61 PROTOTYPE DIGITAL TECHNICAL LIBRARY

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NAVAL ENGINEERs JOURNAL 1992年第2期104卷 58-68页

作者： VINROOT, CA ORNER, JG USN Capt. Charles A. Vinroot USN (Ret.)retired from the U.S. Navy in September 1991 following over 27 years of active duty as an engineering duty officer. He holds a BSEE from North Carolina State University and a MSEE and professional degree from the U.S. Naval Postgraduate School. During his naval career he served on USSIndependence (CVA-62) and USSLuce (DLC-7/DDC-38). He also served at Supship Quincy Mass. and Hunters Point Naval Shipyard. He was stationed in Washington D.C. with assignments at CNO (OP 98) ASN (S&L) and the Naval Sea Systems Command. Captain Vinroot was technical director of the Battleship Reactivation Program (PMS 378) technical director of the Destroyer Acquisition Program (PMS 389) and deputy program manager of the Amphibious Warfare and Strategic Sealift Program (PMS 377). Most recently he served as program manager for Gas Turbine Surface Combatants (PMS 314) and Surface Combatants (PMS 330). Captain Vinroot is now employed by PRC Inc. and serves as technical director for the Advanced Technology Division in Crystal City Va. Jeffery G. Ornergraduated from Wittenberg University in Springfield Ohio in 1979 with a bachelor of arts degree in political science and earned a master's of science degree in business from The American University in Washington D.C. in 1982. He has ten years of professional experience with the Naval Sea Systems Command in positions with responsibilities for logistic support planning policy and delivery computer-aided acquisition and logistic support and Fleet Modernization Program (FMP) and ship construction issues. He was a key player in establishing the current FMP integrated logistic support (ILS) process and in implementing of the Ships' Configuration and Logistic Support Information System (SCLSIS). His current position as Fleet Logistic Support Branch head for the Surface Combatant Program includes responsibility for logistic support and management of ship configuration and logistic data for all surface combatant ships (except for Aegis ships). In

Uss Ingraham (FFG-61) is the prototype ship for Navsea's Advanced Technical information system (ATIs). ATIs is a digital technical library, which holds on optical disks the ship's 2,000 technical manuals and 73,000 drawing sheets. It contains a detailed ship's configuration index (derived from sCLsIs) to lead the user to the proper drawing or manual, and it replaces the ship's aperture cards and the second (library) copy of the technical manuals. ATIs, and the data standards established and tested through ATIs development, will be the technical library portion of micro-sNAP and sNAP III. It also forms an important part of Navsea's plans to utilize EDMICs data. This paper describes the goals and technical concepts behind the development of ATIs. Problems encountered, solutions developed, and lessons learned are detailed. special attention was paid to the application of the Computer Aided Acquisition and Logistic support (CALs) standards, problems caused by conflicts and ambiguities in those standards, the standards. Original program goals are compared with actual operational experiences. Plans for future expansion are outlined, including applications of this technology in the availability planning and execution process. A comparison is developed among the various methods of optical imaging and their costs and benefits.

关键词： information Retrieval systems

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IMPROVING THE sHIP DEsIGN, ACQUIsITION AND CONsTRUCTION PROCEss

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NAVAL ENGINEERs JOURNAL 1992年第2期104卷 39-57页

作者： RYAN, JC JONs, OP J. Christopher Ryan:earned his bachelor's and master's degrees in Naval Architecture from Webb Institute and MIT respectively. He spent three years at the Advanced Marine Technology Division of Litton Industries working on the DD-963 class ship design and related computer aided design projects. he subsequently went to the Navy Department concentrating on early stage design of surface combatants for 12 years including work on the FFG-7 Sea Control Ship CSGN and CVV aircraft carrier projects. He then shifted focus and became the technical director for the Computer Supported Design Program in NavSea for five years. Mr. Ryan has served in several supervisory positions within the Ship Design Group in NavSea since that time. He is currently the project manager for the Ship Design Acquisition and Construction Process Improvement Project. Otto P. Jons:received a Diplom Ing. in shipbuilding from the Technical University of Hannover W. Germany and an M.S. in naval architecture and marine engineering from the Massachusetts Institute of Technology in 1967. He then joined Litton Ship Systems where he was responsible for the preliminary design of the DD-963 hull structure and then for ship systems as manager LHA Ship Systems Engineering Department. From 1972 to 1974 he was principal research scientist at Hydronautics. In 1976 as technical director he helped establish the local office of Designers and Planners. Otto Jons was one of the co-founders of Advanced Marine Enterprises Inc. in 1976 where he is corporate vice president engineering.

In the spring of 1990, the Navsea Chief Engineer initiated a project to improve the design, acquisition and construction (DAC) of U.s. Navy ships. The project's objectives are to reduce the time and cost of acquiring and operating Navy ships while improving their quality, unlike previous studies on the subject, the project utilizes a rigorous process analysis approach and attempts to use quantitative measures as the basis for recommending improvements. The paper is, of necessity, a status report on the progress of this project. Topics covered include: the DAC process;a look at the current state of ship acquisition time, cost, and quality;the methodology for process improvements;and early findings.

关键词： Naval Vessels

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