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OUT-OF-PRODUCTION MICRO-ELECTRONICS - AN ACHILLES HEEL OF DEFENSE SYSTEMS

NAVAL ENGINEERS JOURNAL 1988年第5期100卷 69-72页

作者： MACKENZIE, CM WOOTTEN, R HOY, K NEELY, J KOSCO, D SMITH, W C. Malcolm Mackenzie:is the Materials and Parts Availability Control program manager at U.S. Army Laboratory Command Adelphi Md. Mr. Mackenzie has a B.S. degree in mechanical engineering from Northwestern University an M.S. degree in the same field from the University of Michigan and an M.B.A. from East Texas State University. Richard Wootten:is project officer of the U.S. Army Material Command's Materials and Parts Availability Control Information Data System Project Adelphi Md. Mr. Wootten holds an associate's degree in mechanical engineering from Northern Virginia Community College and a Bachelor of Science in Electronics Engineering from The University of Alabama. Kevin Hoy:is manager of the Microelectronics Obsolescence Management Program at the Naval Avionics Center Indianapolis. Mr. Hoy holds both bachelor and master of science degrees in mathematics from Purdue University. James Neely:is leader of the Materials Management Team Industrial Materials Division in the Directorate of Manufacturing Air Force Systems Command Dayton Ohio. Mr. Neely holds a bachelor's degree in political science from The University of Georgia and a master of science degree in public administration from The University of Missouri. Don Kosco:is an electronics engineer currently involved with introducing new technologies into weapons systems. He is in the Directorate of Reliability Maintainability and Technology Policy HQ Air Force Logistics Command Dayton Ohio. Mr. Kosco holds a bachelor of engineering degree from Widener University a master's in systems engineering from The Air Force Institute of Technology and an MBA from the University of Texas at San Antonio. William Smith:is head of the Plans Branch in the Office of Policy and Plans Defense Electronics Supply Center (DESC) Dayton Ohio. He was for many years manager ofDESC's Diminishing Manufacturing Sources (DMS) Program. Mr. Smith holds a bachelor of arts degree in political science from Indiana University.

both the timely manufacture of defense systems and their subsequent on-line operability depend upon the availability of component parts. The growing problem of microelectronic component nonavailability is casting a shadow over logistics support to these systems. This paper will discuss the causes of the problem and provide some examples of cases confronted by the DoD logistics community. It will also identify some actions which have been taken in the past to manage the issue as well as initiatives now underway. Finally it will look at what lies ahead.

关键词： Microelectronics

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A METHODOLOGY FOR EVALUATING ANTIFOULING PAINTS

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Naval Engineers Journal 1967年第1期79.0卷 107-117页

作者： COLOGER, C.P. FREIbERGER, A. Christopher P. Cologer received a B.S. Degree in Wood Utilization at Syracuse University. He joined the staff of the Naval Applied Science Laboratory in 1951 and carried out applied research in the field of wood technology and beginning in 1960 on high temperature elastomeric materials. Since 1962 he has been associated as a Materials Engineer with the Laboratory's program on studies of marine fouling. Arnold Freiberger received his Degree in Chemical Engineering at the City College of New York. Employed as a Materials Engineer at the U. S. Naval Applied Science Laboratory since 1952 he is the Task Leader of the Laboratory's program on naval cold weather problems and has done fundamental and applied research on ice adhesion and ice release coatings. Since 1962 he has been in charge of the Laboratory's marine folding research program and more recently has assumed leadership of the hydrofoil materials research program.

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REARING ACORN bARNACLE CYPRIDS IN THE LAbORATORY FOR MARINE FOULING STUDIES

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Naval Engineers Journal 1966年第5期78卷 881-890页

作者： FREIbERGER, A. COLOGER, C.P. Arnold Freiberger received his Degree in Chemical Engineering at the City College of New York. Employed as a Materials Engineer at the U. S. Naval Applied Science Laboratory since 1952 he is the Task Leader of the Laboratory's program on naval cold weather problems and has done fundamental and applied research on ice adhesion and ice release coatings. Since 1962 he has been in charge of the Laboratory's marine fouling research program and more recently has assumed leadership of the hydrofoil materials research program. Christopher P. Cologer received a B.S. Degree in Wood Utilization at Syracuse University. He joined the staff of the Naval Applied Science Laboratory in 1951 and carried out applied research in the field of wood technology and beginning in 1960 on high temperature elastomeric materials. Since 1962 he has been associated as a Materials Engineer with the Laboratory's program on studies of marine fouling.

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DEEP SEA ARRAYS FOR materials EXPOSURE

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NAVAL ENGINEERS JOURNAL 1968年第2期80卷 287-&页

作者： MACANDER, A THE AUTHOR:attended Fairleigh Dickinson University from which he received a B.S. degree in Mechanical Engineering in 1962. He is presently attending Stevens Institute of Technology where he is pursuing a graduate degree in Plastics Engineering. Since 1962 Mr. Macander has been a member of the U. S. Naval Applied Science Laboratory technical staff as a Mechanical Engineer. For the last five years he has been engaged in the development of syntactic foam systems for buoyancy and structural applications in the deep ocean as well as the development of ultrasonic nondestructive test methods for quality assurance of these foam materials. In addition Mr. Macander is responsible for the deep submergence materials exposure program in the ocean being conducted by the U. S. Naval Applied Science Laboratory. He is also a member of the Marine Technology Society.

United States Naval Applied science Laboratory has been installing and retrieving deep sea mooring installations in southeastern part of Tongue of Ocean (TOTO), bahamas since 1965;conventional moorings, such as vertical "taut-wire" rope moorings, as well as moorings of more complex design have been used to expose variety of metallic and nonmetallic materials;because of loss of one mooring, multiple recovery systems was designed;new array, materials under exposure, and operations connected with installation are described.

关键词： Undersea technology

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Investigation of a novel biocide material for biocorrosion in simulated seawater: A case study on Tinospora cordifolia extract

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Case Studies in Chemical and Environmental engineering 2024年 10卷

作者： Royani, Ahmad Hanafi, Muhammad Aigbodion, Victor Sunday Prastya, Muhammad Eka Verma, Chandrabhan Mubarak, Nabisab Mujawar Alfantazi, Akram Manaf, Azwar Research Center for Metallurgy National Research and Innovation Agency – BRIN Kawasan Puspiptek Banten Tangerang Selatan 15314 Indonesia Postgraduate Program of Materials Science Study Department of Physics Faculty of Mathematics and Natural Sciences Universitas Indonesia Depok 16424 Indonesia Research Center for Pharmaceutical Ingredients and Traditional Medicine National Research and Innovation Agency – BRIN Kawasan Puspiptek Banten Tangerang Selatan 15314 Indonesia Department of Metallurgical and Materials Engineering University of Nigeria Nsukka 410001 Nigeria Department of Chemical and Petroleum Engineering Khalifa University of Science and Technology P.O. Box 127788 Abu Dhabi United Arab Emirates Petroleum and Chemical Engineering Faculty of Engineering Universiti Teknologi Brunei Bandar Seri Begawan BE1410 Brunei Darussalam Department of Biosciences Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Chennai India

This case report investigates the preventive effect of Tinospora cordifolia extract on biocorrosion induced by Pseudomonas aeruginosa on mild steel API 5L in the simulated seawater medium. Electrochemical techniques, spectroscopic techniques, and surface analysis were employed to investigate biocide performance and corrosion behavior. P. aeruginosa has been shown to enhance iron dissolution in seawater medium. These findings point to the role of P. aeruginosa bacteria in forming differential oxygen, which causes corrosion. Morphology results from atomic Fourier microscopy (AFM) highlight the presence of P. aeruginosa in biotic environments, where the surface is rougher than in abiotic conditions. On the other hand, adding T. cordifolia to the biotic medium resulted in a smoother and more homogeneous surface without any significant deterioration. Electrochemical findings reveal that adding 300 mg L⁻¹ of T. cordifolia extract prevents the microbiologically influenced corrosion (MIC) of steel API 5L, with an optimum effectiveness value of 74.50 % after 21 days of incubation. This protective effect is caused by forming a more compact iron oxide surface layer and the adsorption of phenolic active compounds such as Moupinamide and others on the surface of mild steel API 5L, as detected by liquid chromatography-mass/spectrometry-mass spectrometry (LCMS-MS), Fourier-transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FE-SEM) techniques. © 2024 The Authors

关键词： bio-corrosion biofilm Green biocide Plant extract Pseudomonas aeruginosa Tinospora cordifolia

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Corrigendum to “The effects of TiC grain size and steel binder content on the reciprocating wear behaviour of TiC-316L stainless steel cermets” [Wear 350–351 (2016) 116–129]

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Wear 2016年 356-357卷 158-158页

作者： Chukwuma C. Onuoha Chenxin Jin Zoheir N. Farhat Georges J. Kipouros Kevin P. Plucknett Dalhousie University 1360 Barrington Street Materials Engineering Program Department of Process Engineering and Applied Science Nova Scotia Canada B3H 4R2

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Intensification of heat exchanger performance utilizing nanofluids

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International Journal of Thermofluids 2021年 10卷

作者： Maghrabie, Hussein M. Elsaid, Khaled Sayed, Enas Taha Abdelkareem, Mohammad Ali Wilberforce, Tabbi Ramadan, Mohamad Olabi, A.G. Department of Mechanical Engineering Faculty of Engineering South Valley University Qena83521 Egypt Chemical Engineering Program Texas A& M University College StationTX United States Center for Advanced Materials Research University of Sharjah PO Box 27272 Sharjah United Arab Emirates Chemical Engineering Department Minia University Elminia Egypt Department of Sustainable and Renewable Energy Engineering University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Mechanical Engineering and Design Aston University School of Engineering and Applied Science Aston Triangle BirminghamB4 7ET United Kingdom International University of Beirut PO Box 146404 Beirut Lebanon Associate member at FCLAB CNRS Univ. Bourgogne Franche-Comte Belfort cedex France

Heat exchangers are widely utilized in different thermal systems for diverse industrial aspects. The selection of HEx depends on the thermal efficiency, operating load, size, flexibility in operation, compatibility with working fluids, better temperature and flow controls, and comparatively low capital and maintenance costs. Heat transfer intensification of heat exchangers can be fulfilled using passive, active, or combined approaches. Utilizing nanofluids as working fluids for heat exchangers have evolved recently. The performance of heat exchangers employed different nanofluids depends mainly on the characteristics and improvement of thermophysical properties. Regarding the unique behavior of different nanofluids, researchers have attended noteworthy progress. The current study reviews and summarizes the recent implementations carried out on utilizing nanofluids in different types of heat exchangers, including plate heat exchangers, double-pipe heat exchangers, shell and tube heat exchangers, and cross-flow heat exchangers. The results showed that nanofluids with enhanced thermal conductivity, although accompanied by a considerable decrease in the heat capacity and raising viscosity, has resulted in performance enhancement of different heat exchangers types. So, the performance evaluation criterion that combines the thermal enhancement and increases the pumping power for any type of heat exchangers is requisite to evaluate the overall performance properly. The challenges and opportunities for future work of heat transfer and fluid flow for different types of heat exchangers utilizing nanofluids are discussed and presented. © 2021 The Author(s)

关键词： Heat exchangers

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Fine 3D control of THz emission in air with dual femtosecond laser pre-pulses at tunnelling ionisation regime

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Light(Advanced Manufacturing) 2024年第3期5卷 62-74页

作者： Hsin-Hui Huang Takeshi Nagashima Kota Kumagai Yoshio Hayasaki Saulius Juodkazis Vladimir T.Tikhonchuk Koji Hatanaka Optical Sciences Centre ARC Training Centre in Surface Engineering for Advanced Materials(SEAM)School of ScienceSwinburne University of TechnologyHawthornVictoria 3122Australia Faculty of Science and Engineering Setsunan University17-8 Ikeda-NakamachiNeyagawaOsaka572-8508Japan Center for Optical Research and Education(CORE) Utsunomiya University7-1-2 YotoUtsunomiya 321-8585Japan WRH Program International Research Frontiers Initiative(IRFI)Tokyo Institute of Technology Nagatsuta-choMidori-kuYokohamaKanagawa 226-8503 Japan Laser Research Center Physics FacultyVilnius UniversitySauletekio Ave.1010223 VilniusLithuania Centre Lasers Intenses et Applications Universite de Bordeaux351Cours de la Liberation33405 Talence cedexFrance Extreme Light Infrastructure ERIC ELI Beamlines FacilityZa Radnicic 83525241 Dolni BřežanyCzech Republic Organization for Research Strategy and Development Okayama Univ.1-1-1 Tsushima-nakaKita-kuOkayama 700-8530Japan

Emission of THz radiation from air breakdown at focused ultra-short fs-laser pulses(800 nm/35 fs)was investigated for the 3D spatio-temporal control where two pre-pulses are used before the *** laser pulse induced air breakdown forms a~120μm-long focal volume generate shockwaves which deliver a denser air into the focal region of the main pulse for enhanced generation of THz radiation at 0.1-2.5 THz spectral *** intensity of 162 pre-and main-pulses was at the tunnelling ionisation intensities(1-3)×10 W/cm and corresponded to sub-critical(transparent)plasma formation in *** analysis of THz radiation revealed that orientation of the air density gradients generated by pre-pulses and their time-position locations defined the ellipticity of the generated THz electrical *** rotational component of electric current is the origin of THz radiation.

关键词： THz radiation Femtosecond laser induced breakdown Air breakdown spatio-temporal control

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Expansion cooling prospects for large scale applications

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International Journal of Thermofluids 2023年 20卷

作者： Alami, Abdul Hai Alrashid, Rashid Mdallal, Ayman Yasin, Ahmad Ayoub, Mohamad Alasad, Shamma Aljaghoub, Haya Alashkar, Adnan Abdelkareem, Mohammad Ali Olabi, Abdul Ghani Orhan, Mehmet Department of Sustainable and Renewable Energy Engineering University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Sustainable Energy and Power Systems Research Centre RISE University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Department of Mechanical Engineering American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Department of Mechatronics Engineering American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Department of Industrial Engineering and Engineering Management University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Materials Science and Engineering PhD Program American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Chemical Engineering Department Minia University Elminia Egypt Mechanical Engineering and Design School of Engineering and Applied Science Aston University Aston Triangle BirminghamB4 7ET United Kingdom

Air conditioning in general and cooling in particular are the biggest energy sinks among all electricity consumers. Mitigating energy needs of this sector by active or passive means is a necessity. This paper offers a comprehensive review of various cooling technologies for large scale applications and compares them in terms of economy, environmental footprint and most importantly, energy requirements. There is a main focus on the potential of using expansion cooling, which is defined in conjunction with cooling effects generated during the expansion process of a gas. The interest in such cooling technology stems from the double benefit of utilizing a large-scale compressed air energy storage (CAES) system that can also provide cooling via the expansion of air. This consequently manifests in reducing the electrical demand required for cooling applications. Such a concept is beneficial for hot climates, where most of the electrical demand is reserved for offsetting the cooling load. © 2023 The Author(s)

关键词： Compressed air energy storage

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Meeting the 21st century with SMART mission flexibility

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 341-346页

作者： Alexander, RK Olmstead, L Ronald K. Alexander P.E.:received his B.S. degree in mechnaical engineering from Purdue University and his M.S. degree in mechanical engineering from the Naval Postgraduate School. He is currently manager quality programs at RGE Engineering Service Company where he provides technical support to the ATC Program in the area of combat system modularity design. lhe is a member of ASNE and the Surface Navy Association. Larry Olmstead:received his B.L.S. degree in mathematics and computer scienc from Mary Washington College in 1982 and his M.S. degree in system management from the University of Southern California in 1986. He chaired the C'I Modular Implementation Wroking Group (MIWG) from its inception in September 1993 to December 1996 as a combat system engineer in the PEO CLA Engineering management Office (Code PMS307). He is currently employed at Science Application International Corporation.

A revolution is underway in the design, production and installation of the Navy/Marine Corps team's command, control, communications, computers and intelligence ((CI)-I-4) vision and strategies, which is significantly reducing costs, and dramatically improving the battle readiness of tomorrow's forward deployers. A strong emphasis on research and development has enabled the design, development and installation of the Shipboard Modular Arrangement Reconfiguration Technology (SMART) systems in ships. SMART is a methodology for installing equipment in shipboard spaces that will provide the fleet with enhanced mission flexibility. The heart of this technology is a track rail system, similar to that used by the aircraft industry, which enables equipment to be bolted to the deck, bulkheads or overhead, and meets all shipboard shock and vibration requirements. The fleet can reconfigure designated spaces to receive new systems, install equipment upgrades, position cross-decked systems, or rearrange work areas with minimal industrial work (welding, grinding, lagging, painting, etc.), and maximum cost savings. Key (CI)-I-4 spaces such as Tactical Flag Command Center (TFCC), Joint Operations Center (JOC), Communication Centers, etc., can be reconfigured as required. Thereby, new technology insertion can enable rapid deployment of state-of-the-art technologies much faster than the standard method of welding foundations in place to support various equipment installations. The SMART system includes a foundation track system, modular-connectorized power and lighting, and modular workstations.

关键词： Naval vessels

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