This article introduces the concept of a truly Universal Signal Distribution Network. The emergence of fiberoptic technology as a viable signal transmission medium now gives the N avy the opportunity to use Fiber Opti...
This article introduces the concept of a truly Universal Signal Distribution Network. The emergence of fiberoptic technology as a viable signal transmission medium now gives the N avy the opportunity to use Fiber Optic Cabling and Switching (FOCAS) to implement a universal network. A FOCAS Network can handle all present or future shipboard signal distribution architectures such as point-to-point or data bus. Furthermore, compared to existing cable installations, this network offers lower cost through reduction of the number of cables, weight, and volume, freedom from interference and EMP effects, increased redundancy, and higher operational flexibility. In addition, it will easily satisfy all future expansion or changes in signal distribution by providing at least a ten fold increase in data rate capacity over existing electrical cabling. This last feature alone holds the potential for allowing upgrading and conversion of modern combat systems without need for adding new cabling in the ship. Along with the introduction of the concept of a Universal FOCAS network and its practical benefits and capabilities, this article presents a trade-off between the Radar Data Distribution Network on the FFG and an analogous FOCAS network. Though far from optimized, the resultant FOCAS network shows that the conversion of existing shipboard networks to FOCAS is straightforward and provides a reduction of at least 90% in cable volume and weight and lower cost in cable purchase and installation.
The structural design of a ship's section is a complicated, repetitive and time consuming task. With the advent of new technology, high speed computers have enabled the ship designer to accomplish in a matter of s...
The structural design of a ship's section is a complicated, repetitive and time consuming task. With the advent of new technology, high speed computers have enabled the ship designer to accomplish in a matter of seconds what would formerly take days to accomplish by hand. The Structural Synthesis Design program (SSDP) is a N avy developed computer-aided design tool which is used to design (or to analyze) the longitudinal scantlings for a variety of ship cross sections, consisting of any practical combinations of decks, platforms, bulkheads and materials, i.e., various steel and aluminum alloys. The final hull section design will have the lowest practical weight for the chosen geometric configuration, structural arrangements, and imposed loadings. The scantling developed by the program will satisfy all U.S. N avy ship structural design criteria. An explanation of the objective and design elements of N avy ship structures is included. The rationale behind the SSDP design philosophy is developed along with the significant program capabilities. In an attempt to highlight the influence of automated design procedures on the current naval ship design process, the effect of the SSDP on the DDG 51 destroyer structural development is addressed.
作者:
MARTINSON, MCDirector
Human Development Program Graduate School University of Kentucky Lexington
The article reports that interagency planning and service delivery has been a goal of professionals concerned with handicapped individuals. Five processes are instrumental in defining state and national commitments to...
详细信息
The article reports that interagency planning and service delivery has been a goal of professionals concerned with handicapped individuals. Five processes are instrumental in defining state and national commitments to handicapped individuals: constitutional law, legislation, administration, legal interpretation and case law. Interorganizational models could provide a basis for conceptualizing processes necessary for negotiating interagency agreements. Some of these models include the exchange model, the political economy model and the dialectical model.
The future prospects of the nurse-midwifery profession are evaluated by considering both the factors which support and also those which may impede continued growth. Nurse-midwifery's contribution to health policy ...
The future prospects of the nurse-midwifery profession are evaluated by considering both the factors which support and also those which may impede continued growth. Nurse-midwifery's contribution to health policy goals, in particular, increased access to services and cost containment; consumer preference for this provider; and the uniqueness of the content of care given in nurse-midwifery practice all portend favorably for the future of the profession. Factors which might jeopardize continued growth include an oversupply of obstetricians and legal and reimbursement constraints. Reckoning with the possible effects of a physician oversupply may be the most important task facing the profession.
Projecting our power to far corners of the earth depends on a strategic mobility triad composed of: airlift, prepositioned equipment, and sealift. Airlift can move personnel effectively and limited supplies quickly ov...
Projecting our power to far corners of the earth depends on a strategic mobility triad composed of: airlift, prepositioned equipment, and sealift. Airlift can move personnel effectively and limited supplies quickly over great distances. Prepositioned equipment and supplies can extend the effectiveness of those personnel if the circumstances are right, and if we have chosen our positioning sites well. Sealift will provision the lion's share of any protracted engagement, and the ships of the Merchant Marine are a key element in our sealift resources. This paper describes various ways that the Merchant Fleet is being made more responsive to its possible role as a naval auxiliary, and it describes a new concept called SEA SHED which can quickly expand the versatility of Containerships. Containerships have revolutionized marine transportation and they now represent a large and growing portion of the Commercial Fleet. They are limited in the types of cargo they can carry, however, excluding much of the larger equipment required by military units. SEA SHED is a cargo module which fits into the cell guides of a Containership and effectively converts it to a 'tween deck, break-bulk ship which can carry almost all military equipment.
作者:
KANE, HPThe authoris a Senior Systems Analyst
Systematics General Corporation. During World War II he participated in the invasion and occupation of Kwajalein and Kyushu and had an opportunity to observe Japanese visual concealment techniques first-hand. His education includes a BS degree from Woodbury University and specialized technical studies at the graduate and undergraduate levels of 13 other colleges universities and technical schools in such areas as chemistry geology mathematics computer design solid state physics and metallurgy. He initiated the study associated with this article while employed as a Senior Naval Analyst at Columbia Research Corporation. As Senior Field Engineer with Philco Corporation he participated in naval exercises and naval research and development activities. He also served as Program Manager and Project Engineer for the Multiple Satellite Augmentation Program with Philco/Ford Motor Company Designer on the Saturn I-C/Apollo Program with the Boeing Company and Senior Engineer-Scientist at TRACOR. He has made many contributions in such areas as underwater acoustic passive localization and ranging integrated logistics support configuration management ship energy conservation and reliability analysis.
This paper traces the general evolution of naval warfare requirements and identifies remote sensors and high energy contemporary weapons as threats which have not been dealt with adequately in combatant ship designs. ...
This paper traces the general evolution of naval warfare requirements and identifies remote sensors and high energy contemporary weapons as threats which have not been dealt with adequately in combatant ship designs. The concept of Ship Susceptibility and Signal Reduction Analysis is explained, and the interactive nature of the various threats on ship design is indicated. A table of typical ship susceptibility and signal reduction analysis area is provided. Recommendations for future intensive R&D are also included.
作者:
FLUK, HThe authorgraduated from New York University in 1952 as an Aeronautical Engineer and entered the United States Air Force (USAF). He attended the USAF Institute of Technology for graduate Aerodynamics
and following that served three years as a Project Officer in the field of Special Weapons. Returning to civilian life in 1957 he joined Curtiss-Wright Corporation's Engine Division and shortly thereafter transferred to the company's Model 200 V/STOL Aircraft Program later to become the Tri-Service X-19. His responsibilities variously included Flight Loads and Controls Aerodynamic Research and publication of the X-19 Aircraft Technology. In 1966 he joined Boeing's VERTOL Division initially working in helicopter stability and then in downwash and autorotation characteristics. This was followed by research and development and long-range planning and then assignment to introduce new computer services to the Engineering Department. In 1975 he joined the Naval Air Engineering Center Lakehurst N.J. to provide technology in horizontal and vertical engine jet flows and at the present time is Manager for Systems Studies in the Advanced Systems Office where he works with the Aircraft and Ship Communities to enhance military effectiveness at sea.
A weapons system has been configured specifically to counter (or preempt) the long-range standoff missile threat. Rationale for this system starts with a discussion of cost and weight, and shows why modern multi-missi...
A weapons system has been configured specifically to counter (or preempt) the long-range standoff missile threat. Rationale for this system starts with a discussion of cost and weight, and shows why modern multi-mission systems have become intolerably expensive. Questions are raised regarding the advantages and disadvantages of building future naval aviation forces solely around the Aircraft Carrier Battle Group. The application of a few small modern ships, forming a future Battle Force, holds promise for large economies. Likewise, some accepted views regarding CTOL (Conventional Take Off & Laundry) and V/STOL (Vertical Short Take Off & Launding) aircraft are revisted in terms of their relative costs. A weapons system is proposed which, at one-fourth the weight of an Aircraft Carrier Battle Group, may be produced and operated for one-third the cost.
作者:
BURESH, RJDELAUNE, RDPATRICK, WHFormer Graduate Research Assistant
Research Associate and Boyd Professor respectively. R. J. Buresh is presently employed as a soil scientist in the Upland Nitrogen Program at the International Fertilizer Development Center P.O. Box 2040 Muscle Shoals AL 35660.
The influence of S. alterniflora, a common salt marsh macrophyte, on loss of NH4+-N from a Louisiana (USA) salt marsh soil was examined in the greenhouse. Labeled NH4+-N, equivalent to .apprx. 100 .mu.g N/g soil, was ...
The influence of S. alterniflora, a common salt marsh macrophyte, on loss of NH4+-N from a Louisiana (USA) salt marsh soil was examined in the greenhouse. Labeled NH4+-N, equivalent to .apprx. 100 .mu.g N/g soil, was added in 10 installments over 18 wk to undrained soil cores with and without stands of S. alterniflora. In the presence of S. alterniflora, 93% and 94% of the added N was recovered from constantly flooded and alternately flooded and dried soil, respectively. In the absence of S. alterniflora, loss of added NH4+-N was greater;only .apprx. 56% of the added N was recovered from constantly flooded soil. Actively growing S. alterniflora apparently assimilated the inorganic soil N before it could be lost in gaseous form via nitrification-denitrification reactions.
作者:
ELLSWORTH, WMCLARK, DJMr. William M. Ellsworth:is graduate of the State University of Iowa from which he received B.S. and M.S. degrees in Engineering
majoring in Fluid Mechanics. Upon graduation in 1948 he joined the Staff of the David Taylor Model Basin (DTMB) and during the following ten years held various positions in the Hydromechanics Laboratory. In 1958 he left his position as Head of the Towing Problems Branch and joined Cleveland Pneumatic Industries which later became Pneumo Dynamics Corporation (PDC). He was General Manager of PDC's Systems Engineering Division and in 1961 became a corporate Vice President. In 1964 he returned to DTMB where he became the Technical Manager of the Hydrofoil Development Program Office. In October 1969 he was appointed to his present position of Associate Technical Director for Systems Development and Head Systems Development Department David W. Taylor Naval Ship Research and Development Center. He is a licensed Professional Engineer in the state of Maryland an Honorary Life Member of ASNE
and a Fellow of ASME. He also has been the author of a number of papers and reports in the field of Naval Engineering and has served as a member of the ASNE Council from 1972 to 1974 was a member of the ASNE Flagship Section Council (1977-80) and is currently a member of the ASNE Honors and Awards Committee. He became a member of ASNE in 1960 and received his Honorary Life Membership when he was awarded the ASNE Gold Medal for 1973 at ASNE Day 1974. Dennis J. Clark:received his Bachelor's degree in Civil Engineering from City College of New York in 1963. Upon graduating
he joined DTMB's Structural Mechanics Laboratory where he worked on a number of full-scale trials of surface ships evaluating the structural integrity of icebreakers sonar domes and Hydrofoils. He eventually was responsible for the entire structural research program in support of the Hydrofoil Advanced Development Office and in 1971 joined the Hydrofoil Program Office as the Manager of Systems Integration. In that capacity he
In today's environment of rapidly escalating costs, increasing technological complexity, and growing threat, we must actively seek ways to improve our effectiveness in applying limited resources to the design of N...
In today's environment of rapidly escalating costs, increasing technological complexity, and growing threat, we must actively seek ways to improve our effectiveness in applying limited resources to the design of Navy ships. One important aspect of this process involves the development and application of new technology to ship design. An exhaustive treatment of this subject is clearly beyond the scope of a single technical paper. It is the Authors' objective, however, to acquaint the reader with the nature and role of the Navy's Laboratory Community in general and DTNSRDC in particular; to examine some recent initiatives taken at DTNSRDC and some key issues; and, hopefully, to contribute in some small way to the building of a stronger constructive partnership between ship development and design activities. The view is that from the perspective of a Navy Laboratory and pertains to the design of the ship itself as opposed to the weapons system.
暂无评论