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SSRN 2023年

作者： Revathi, R. Sukumar, M. Ubaidullah, Mohd Gupta, Manish Sehgal, Satbir Singh Udhaya, M.P. Aji Pandit, Bidhan Sundararajan, M. Subramani, M.A. Dash, Chandra Sekhar Department of Biotechnology Periyar University Centre for Post Graduate and Research Studies Tamil Nadu Dharmapuri636 205 India Department of Applied Physics Sri Venkateswara College of Engineering Pennalur Tamil Nadu Sriperumbudur602 117 India Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh11451 Saudi Arabia Division of Research and Development Lovely Professional University Punjab India Department of Physics Holy Cross College Nagercoil629 004 India Department of Materials Science and Engineering and Chemical Engineering Universidad Carlos III de Madrid Avenida de la Universidad 30 Leganés Madrid28911 Spain PG & Research Department of Physics Paavendhar College of Arts & Science M.V. South Thalaivasal Tamilnadu Salem636 121 India Department of Chemistry Apollo Arts and Sciences College Poonamallee Chennai602 106 India Department of Electronics and Communication Engineering Centurion University of Technology and Management Odisha Bhubaneswar752050 India Chandigarh University India

Nickel doped magnesium cubic spinel ferrite nanoparticles (NPs) were prepared through microwave combustion method (MCM). The structure of magnesium ferrite normal spinel is obtained from XRD analysis. The average crystallite size is between 26 and 17 nm. The elemental compositions and oxidizing states of Ni2+ doped MgFe2O4 ferrites were evaluated by using XPS analysis. Morphology of spinel nanoparticles were studied using HR-SEM images. The energy dispersive X-ray method is used for ensuring the presence of elements and the band gap value 2.09, 2.02, 1.85 and 1.82 eV have obtained using the tau’c relation. The magnesium spinel structure is confirmed the band at 434 and 561 cm-1 which corresponds to the stretching vibration of octahedral site (Mg2+ -O2-) and tetrahedral site (Fe3+ -O2-) respectively. From the hysteresis loops the magnetic features viz. Hc, Mr and Ms were determined. Further dielectric studies and AC conductivity of the prepared samples is performed. © 2023, The Authors. All rights reserved.

关键词： Surface chemistry

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Coordinated control and its implementation

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Process Safety Progress 1982年第2期1卷 85-90页

作者： C. S. Lin T. H. Tsai J. W. Lane Tenneco Inc. Houston Texas 77001 Cheng S. Lin:was born in Taiwan and received a BS in Mechanical Engineering at Cheng Kung University. He came to the Rensselaer Polytechnic Institute in 1959 where he received a MME in Mechanical Engineering in 1962 and a PhD in Mechanical Engineering in 1966 He spent three years at West Virginia Pulp and Paper Co. in Process Control Research three years at TRW Inc. Systems Group on the Apollo program and nine years at Bonner and Moore Assoc. installing process control systems worldwide. He joined the Operations Technologies Department of Tenneco Inc. as a Consulting Engineer in June 1980. He is a US citizen and a member of IEEE. Thomas H. Tsai:is a Managing Engineer of the Operations Technologies Department of Tenneco Inc. He is a Registered Professional Engineer in the State of Calif. and is a Member of AIChE and a Senior Member of ISA. He received a BS degree in Chemical Engineering at Tunghan University of Taiwan and attended graduate school at Oklahoma State University. James W. Lane:received a BE and MS in Chemical Engineering from the University of Southern California. He is a Registered Professional Engineer in the States of Tex and Calif. and is a Member of the AIChE Senior Member of the IEEE and Senior Member of the SME. For the last seven years he has been Director of the Operations Technologies Department of Tenneco Inc. a cooperate engineering group providing expertise in advanced control technology for process control energy management and environmental monitoring systems.

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Identification of hardware problems through maintenance data analysis

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Naval Engineers Journal 1967年第N 3期v 79卷 p491-504页

作者： Leonardy, S.P. The Author is a mechanical engineering graduate from the University of Florida. He is a registered professional engineer in Florida and Virginia and is listed in “Who's Who in the South and Southwest.'' Mr. Leonardy is active in engineering circles. He is past chairman of the Eastern Virginia Section of the American Society of Mechanical Engineers. He has presented numerous technical papers covering a wide variety of subjects. He has eighteen years experience in engineering and technical management in government and industry including supervisory engineering positions at the Naval Ordnance Plant in Macon Georgia and the Naval Weapons Station at Yorktown Virginia. The diversity of his work ranges from munitions plants for the Chinese Nationalists Government in Taiwan to aluminum plants in Canada. He has worked with the NASA at Langley Research Center and has participated in numerous space research projects received achievement awards for his participation on the Project Fire Apollo Re-entry Program and the Langley Rocket Motor Review Board. He is currently with the Reliability and Maintainability Engineering Group of the Stanwick Corporation. He is responsible for much of the developmental work on navy contracts.

Description of Problem Identification program (PIP) developed by Naval Ship Systems Command;it uses maintenance data bank, and provides programs to retrieve and sort data, which are analyzed by experienced engineers;closed loop communications system between Fleet, Type Commands, Tech Codes, and program management, and program Control are provided;problems may result from such factors as design deficiencies, poorly written technical manuals, lack of repair parts, lack of diagnostic capability, operating requirements, or environmental conditions;examples and sample analysis reports are included.

关键词： Warships

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Promotion of the Catalytic Polymerization of Hydroquinone Towards Humic-Like Substances by Graphitic Carbon Nitride

SSRN

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SSRN 2023年

作者： Ahmed, Mahmoud M.M. Liu, Yu-Ting Venkatesan, Srinivasadesikan Wu, Min Chien Nail, Howida M. Tzou, Der-Lii M. Lin, Ming-Chang Chen, Kai-Yue Tzou, Yu-Min Department of Soil and Environmental Sciences National Chung Hsing University 145 Xingda Rd. Taichung40227 Taiwan Innovation and Development Center of Sustainable Agriculture National Chung Hsing University 145 Xingda Rd. Taichung40227 Taiwan Department of Chemistry School of Science and Humanities Vignan's Foundation for Science Technology and Research Guntur Andhra Pradesh Vadlamudi522 213 India Graduate institute of Biomedical Engineering National Chung Hsing University 145 Xingda Rd. Taichung40227 Taiwan Institute of Chemistry Academia Sinica Nangang Taipei11529 Taiwan Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu30010 Taiwan Professional Bachelor Program of Farm Management National Chiayi University Chiayi600355 Taiwan

The utilization of graphitic carbon nitride (C3N4) to enhance the oxidative polymerization of hydroquinone (HQ) within birnessite (δ-MnO2) systems was investigated. C3N4, a Lewis base enriched with nitrogen, acted as a bridge through π−π interactions between metal oxides and polyphenols. These interactions increased the affinity of the reactants, resulting in an enhanced reaction rate of six-fold, accelerated browning, and improved complex stability of C3N4...HQ...MnO2 complex. As a result, a humic-like substance (HS) was rapidly formed with improved surface morphology and larger particle sizes. Electron transfer of HQ...MnO2 promoted by C3N4 played a crucial role in HQ oxidation, expanding atomic distance and composite morphology. Theoretical calculations supported the experimental results, indicating strong affinity and higher binding energies in the C3N4...HQ...MnO2 complex. The complex had a more stable structure with a narrower HOMO-LUMO gap, facilitating HS formation. 13C and 1H NMR spectra confirmed the experimental-theoretical agreement. © 2023, The Authors. All rights reserved.

关键词： Binding energy

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AIR-CUSHION LANDING CRAFT NAVIGATION

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NAVAL ENGINEERS JOURNAL 1985年第4期97卷 248-260页

作者： GRAHAM, HR KIM, JC BAND, EGU FOWLER, AW Herbert R. Graham:received his degrees of B.S. in 1951 and M.S. in 1958 in aeronautical engineering from the Massachusetts Institute of Technology and the California Institute of Technology respectively. He also attended the Harvard Graduate School of Business Administration. He is presently a task manager at TRW Inc. McLean Virginia responsible for landing craft air cushion (LCAC) engineering support. Since joining TRW in 1967 he has had several technical project management and system engineering responsibilities in amphibious ships transportation and energy. He was responsible for the preliminary engineering design and cost estimates for tracked air cushion vehicles (TACVs). He has been active in several professional societies including ASNE and served as vice-chairman Los Angeles Section American Institute of Aeronautics and Astronautics. John C. Kim:received his degrees of B.S. in electrical engineering Tri-State University 1959 M.S. in electrical engineering Michigan State University 1960 and Ph.D. in electrical engineering Michigan State University. He is presently a senior staff engineer with TRW Inc. McLean Virginia where his technical experience has included communications system engineering and navigation system analysis. Since joining TRW in 1969 he has held numerous positions including section head project manager and department manager. His previous employment includes E-Systems/Melpar Division and Honeywell. Dr. Kim has been active in the IEEE Washington Chapter activities which included secretary vice-chairman and chairman of Systems Science and Cybernetics Group. Edward G.U. Band:received a B.S. degree in mechnical engineering in 1946 and a D.I.C in aeronautical engineering in 1947 at the City and Guilds College of London University. In 1951 he received an M.S. degree from Stevens Institute of Technology in fluid dynamics. After a career in the aircraft industry in England Canada and the U.S.A. he spent several years teaching in Chile and at Webb Institute of Naval Archi

Air cushion vehicles (ACVs) have operated successfully on commercial routes for about twenty years. The routes are normally quite short; the craft are equipped with radar and radio navigation aids and maintain continuous contact with their terminals. Navigation of these craft, therefore, does not present any unusual difficulty. The introduction of air cushion vehicles into military service, however, can present a very different picture, especially when external navigation aids are not available and the craft must navigate by dead reckoning. This paper considers the problems involved when navigating a high-speed air cushion vehicle by dead reckoning in conditions of poor visibility. A method is presented to assess the ACV's navigational capability under these circumstances. A figure of merit is used to determine the sensitivity of factors which affect navigation such as the range of visibility, point-to-point distance, speed, turning radius and accuracy of onboard equipment. The method provides simplistic but adequate answers and can be used effectively to compare the-capability and cost of alternative navigation concepts.

关键词： AIR CUSHION VEHICLES

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Reliability analysis of transverse stability of surface ships

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 129-140页

作者： Atua, K Ayyub, BM Khaled l. Atua:is a graduate student at the Reliability Engi-neering Program at the University of Maryland at College Park. He completed his B.S. degree in naval architecture and marine engineering in 1988 and completed his M.S. degree in naval architecture and marine engineering in 1992 at Alexandtia University. He is also a visiting scholar in the Civil Engineering Department at the University ofMaryland at Colkge Park. He is conducting research with Dc Bilal M. Ayyub in the area of develupment of reliability-based design of ship structures and systems. He is a member ofASNE and SNAME. He has authored or coauthored several papers and reports. Bilal M. Ayyub: Ph.D. RE. is aprofssor of civil engineer-ing at the University of Maryland at College Park. He is also a researcher and consultant in the areas of structural engineering inspection methods and practices reliability and risk analysis. Dc Ayyub completed his B.S. degree in civil engineering in 1980 and completed both his M.S. (1981) and Ph.D. (1983) degrees in civil engineering at the Georgia Institute of Echnol-OD. Dc Ayyub has an extensive background in uncertainty modeling and analysis risk-based analysis and design simula-ion and marine structural reliability. He is engaged in research work involving structural reliability marine structures uncer-tainty modeling and analysis 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 U.S. Department of Defense the U.S. Army crops of Engineers the Maryland State Highway Administration the American Society ofMechanica1 Engineers and several engi-neering companies. Dc Ayyub served the engineering communio in various capacities through societies that include ASNE ASCE ASME SNAME IEEE-CS and NMIPS. He is a member ofthe ASME Research Committee of Risk Ethnology and the ASME Committee on Human Factors. Currently he is the chai

An introduction to a rational development of transverse stability criteria for surface ships is presented in this paper. The development is based on a probabilistic analysis of the uncertainties associated with the design parameters involved in determining the transverse stability. Reliability methods are used for assessing and determining transverse stability of ships. These reliability methods address the uncertainties associated with the basic design variables that are involved in stability assessment and design. The sources of uncertainty in stability variables are presented, uncertainties associated with these basic random variables are summarized, different reliability assessment methods are described, a case study that shows the computation procedure using some of these methods is discussed for illustration purposes, and finally, conclusions and recommendations for further work in this area are presented.

关键词： Naval vessels

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Survey of reduced workload and crewing strategies for ocean patrol vessels

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NAVAL ENGINEERS JOURNAL 2001年第2期113卷 29-44页

作者： Baker, C Krull, R Snyder, G Lincoln, W Malone, TB Clifford C. Baker CIE CHFEP is a senior staff scientist at Carlow International Incorporated. He has applied most of his 24 years of experience in the application of human engineering technology to maritime systems. Mr. Baker has directed much of Carlow's efforts to reduce ship workload and to improve human performance and maritime safety through application of human factors methods and data. He is a Certified Industrial Ergonomist (CIE) as well as a Certified Human Factors Engineering Professional (CHFEP). Both certifications were granted by Oxford Research where Mr. Baker also serves as an Advisory Board member. Russell D. Krull P.E. is a senior engineer with A&T/Proteus Engineering with more than 18 years of experi-ence in marine engineering naval architecture and program management including 16 years of active duty in the U.S. Coast Guard. Recent experience includes advanced ship design studies engineering software development technical support for the USMC Advanced Amphibious Assault Vehicle propulsion systems analyses ship structural engineering and cargo handling systems engineering. Mr. Krull has an M.S.E. in naval architecture and marine engineering and an M.S.E. in industrial and operations engineering from University of Michigan and a B.S. in ocean engineering from the U.S. Coast Guard Academy. Capt. Glenn L. Snyder USCG. Regrettably since this paper was originally written Capt. Snyder has passed away. At the time of his death he was an operations specialist assigned to the Coast Guard's Deepwater Capabilities Replacement Project as Chief of Human Systems Integration. He served as commanding officer of the patrol boat Cape George (WPB-95306) the icebreaking tug Biscayne Bay (WTGB-104) and the cutter Legare (WMEC-911). A 1975 graduate of the U.S. Coast Guard Academy Capt. Snyder held an M.A. in national security and strategic studies from the U.S. Naval War College and an M.A. in international relations from Salve Regina College. In addition he was a 1998 fellow of the Foreign Service

The U.S. Coast Guard is in the concept exploration phase of its Integrated Deepwater System (IDS) acquisition project. This project will define the next generation of surface, air and command, control, communications, computers, intelligence, surveillance, and reconnaissance (C4ISR) assets used to perform the Coast Guard's missions in the IDS environment (>50 NM off the U. S. coastline). As part of early technology investigations, the needs exist to: (1) analyze the workload requirements of the IDS, (2) identify alternative means to perform ship's work, and (3) optimize ship manning consistent with ship workload, performance criteria, and the available tools and equipment aboard. To reduce shipboard work requires an understanding of the mission and support requirements placed on the vessel and crew, how these requirements are currently met, and how requirements might otherwise be met to reduce workload and crew size. This study examined currently implemented workload and manpower reducing approaches of commercial maritime fleets, U.S. and foreign navies, and foreign coastguards. These approaches were analyzed according to evaluation criteria approved by the IDS acquisition project team. From this, strategies for shipboard work reduction that may be considered for adoption by the IDS were identified and analyzed according to performance and costs factors. Ten workload-reducing strategies were identified: damage control, bridge, multiple crewing, engineering, risk acceptance, modularity, deck, enabling technologies, ship/personnel readiness, and operability and maintainability.

关键词： Naval vessels

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CAD CAM GOES TO SEA - THE SAAR-5 DESIGN AND CONSTRUCTION

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NAVAL ENGINEERS JOURNAL 1992年第3期104卷 148-155页

作者： LINDGREN, JR SOLITARIO, WA MOORE, AP STREIFF, MA John R. Lindgren Jr:. is vice president for engineering at Ingalls Shipbuilding Inc. a Division of Litton Industries in Pascagoula Miss. He joined Ingalls in 1958 and has held various positions in the Engineering Division and participated in the design of numerous merchant ships drill rigs submarines and surface combatants and auxiliary support ships. Mr. Lindgren is a 1958 graduate of the University of Southwest Louisiana. His degree is in mechanical engineering and he is also a licensed professional engineer. William A. Solitario:is the director of advanced technology at Ingalls Shipbuilding Inc. in Pascagoula Miss. He received his B.S. degree in chemical engineering from the City University of New York and has 28 years experience in marine engineering and design. His current responsibilities include the direction of Ingalls' IRAD programs and several Navy-funded R&D programs to improve ship's performance and reduce ship's operating costs. He is a member of the Society of Naval Architects and Marine Engineers and past chairman of the Gulf Section East Area. Arnold P. Moore:is the director design engineering at Ingalls Shipbuilding where he is responsible for all new construction design and engineering activities. Prior to promotion to his current position Mr. Moore served as chief naval architect at Ingalls. He has 24 years experience in ship design construction and repair. Mr. Moore holds the professional degree of ocean engineer as well as a master's degree in naval architecture and marine engineering from MIT. He also earned a bachelor's degree in naval science from the U.S. Naval Academy and is a registered professional engineer. Mr. Moore served as an engineering duty officer in the U.S. Navy and is currently a captain in the Naval Reserve. He is a past chairman of the Gulf Section of the Society of Naval Architects and Marine Engineers and a member of the American Society of Naval Engineers and Sigma Xi. Michel A. Streiff:is the manager of CAD/CAM applications at Ingalls Shipbuilding Inc. His

The SA'AR-5 Corvette program is the first major warship construction to be entirely accomplished using a 3-dimensional, interference checked computer based design. This paper discusses the organization and approach used to create the design models which form the basis for interference checking as well as the source of extracted production data. The design or product model is the nucleus of the computer data base that defines the configuration of the entire ship. The data base includes geometry, weight, and material, as well as production control data. The ability of the computer to link such diverse information is the key to maintaining configuration control during the course of the design and construction. The ease with which formatted manufacturing data (both N.C. fabrication and installation) can be extracted enables the preparation of detailed packages containing the desired geometry as well as the associated material and sequencing data, thus assuring the producibility of the design. The SA'AR-5 design is CAD/CAM's state of the art in U.S. shipbuilding.

关键词： Warships

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Bioprospecting culturable and unculturable microbial consortia through metagenomics for bioremediation

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Cleaner Chemical engineering 2022年 2卷

作者： Atif Khurshid Wani Nahid Akhtar Nafiaah Naqash Chirag Chopra Reena Singh Vineet Kumar Sunil Kumar Sikandar I. Mulla Juliana Heloisa Pinê Américo-Pinheiro School of Bioengineering and Biosciences Lovely Professional University Phagwara Punjab 144411 India Waste Re-processing Division CSIR-National Environmental Engineering Research Institute (CSIR-NEERI) Nehru Marg Nagpur 440020 Maharashtra India Department of Biochemistry School of Applied Sciences REVA University Bangalore 560 064 India Post-graduate Program in Environmental Sciences Brazil University Street Carolina Fonseca 584 São Paulo SP 08230-030 Brazil

With the enormous increase in population and industrial network, the harmful pollutants affecting biota have also escalated. The pollutants are consumed by living organisms directly or indirectly reducing animal and economic wellbeing. The degradation of contaminants is imperative owing to the prolonged persistence of contaminants like plastics, heavy metals, pesticides, dyes, pharmaceuticals, and hydrocarbons. Remediation of such pollutants requires efficient methods to prevent mobilizing-contaminants leaching into soil and finally to human beings. In this regard, metagenomics (MGs), a non-culturable technique, involving the direct recovery of the genetic material from environmental samples is an effective tool for understanding the remediation process mediated by microorganisms and their gene products like enzymes. MGs offers a gateway to previously hidden microbial communities grown in the normal and extreme environment through sequence-based or function-based approaches. The culture-independent MGs approach in combination with other meta-omics approaches involves an easy and rapid method for the selection of remediation-efficient microbes. This paper elucidates the negative implications of several contaminants on terrestrial and aquatic biota besides highlighting the role of MGs and associated meta-omics approaches in characterizing contaminant degrading microbes. The MGs research related to bioremediation can help to generate information that will improve the bioremediation process and aid in deciphering the complete microbe-mediated bioremediation mechanism pathways. In future MGs can be helpful to comprehensively understand the mechanisms involved in efficient bioremediation, develop new strategies and models for application in rapid, accurate and efficient bioremediation process and optimize the bioremediation technique. Furthermore, the application of metagenomics to determine microbial diversity and specific genes can act as pollution biomarkers.

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Advances in aircraft carrier life cycle cost analysis for acquisition and ownership decision-making

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NAVAL ENGINEERS JOURNAL 2000年第3期112卷 97-110页

作者： Chewning, IM Moretto, SJ Irvin M. Chewning:is currently the Director of the Aircraft Carrier Cost Estimating and Industrial Analysis Group of the Naval Sea Systems Command. Over the past four years Mr. Chewning has guided the cost analysis effort for the new CVNX class aircraft carrier through a three-part analysis of alternatives and is currently steering it towards Milestone I in June of 2000. In 1999 the CVNX cost analysis team was presented the NAVSEA Association of Scientists and Engineers “outstanding team achievement” award for its work on the CVNX analysis of alternatives. Mr. Chewning's professional career includes over 16 years as an employee of Newport News Shipbuilding as a Pipe Fitter Piping Systems Designer Piping Systems Engineer and Cost Engineer. He has worked at the Naval Sea Systems Command since 1980 as a Senior Cost Analyst Branch Head and Deputy Division Director of the Cost Estimating and Analysis Division. He has preformed cost analysis work for virtually all USN combatant programs including submarines cruisers destroyers frigates and aircraft carriers. He also performed the cost analysis work for the OSD evaluation of the Israeli Naval Modernization Program in the 1980's. Mr. Chewning is also Chairman of the NATO Specialist Team on Ship Costing a subgroup of the NATO Naval Group Six on Ship Design. Under his leadership two Allied Naval Engineering Publications have been completed in the 1990's: ANEP-41 on Ship Costing and ANEP-49 on Ways to Reduce Costs of Ships. In 1999 the NATO Specialist Team on Ship Costing completed a paper titled “Manpower Reduction and the Use of Commercial Standards and Practices to Reduce Costs of Ships.” The result of this work will be incorporated in a future revision of the aforementioned ANEFs. Mr. Chewning is a graduate of North Carolina State University with a Bachelor of Science in Mechanical Engineering. Mr. Chewning has also completed courses at the University of Virginia and Christopher Newport University Mr. Chewning is a graduate of the Program Management College

The U.S. Navy recently conducted an analysis of alternatives (AOA) to set the stage for determining the characteristics and acquisition strategy for its next generation aircraft carrier. The platform design selected is expected to be in service throughout the 21st century. The parameters under consideration for change in the new carrier design lie in the areas of propulsion and electric power generation, aviation, survivability, service life, and total ownership cost (TOC) reduction. The issue of affordability is paramount This paper focuses on the need for the program management office and its supporting cost analysis staff to understand the life cycle cost (LCC) of the existing and proposed future aircraft carriers and to then translate these LCC's into meaningful information for cost-conscious decision making. The challenge is to relate the LCC in terms the key decision-makers and the engineering team can use to satisfy their respective roles. Thus, it is necessary to translate the results of the given ship design alternative LCC's into the paradigms of the respective stakeholders: Fleet User (operators of aircraft carriers) Ship Designers (translators of the fleet operator requirements) program Sponsors (providers of the funding resources) program management Office, Ship builder and Supporting Industry (executors of the acquisition and construction of the ship) Navy and OSD decision-makers (overseers of program execution) The paper describes the aircraft carrier LCC breakdown structure that has resulted, in part, from a recent navy/shipbuilder integrated product team effort to capture total ownership costs. The structure has been used in the AOA as a tool to identify cost drivers and to add the time element to the cast equation in order to perform return on investment and program affordability analysis. The expanded ship work breakdown structure (ESWBS) has emerged as the central backbone of the cost work breakdown for AOA work. The ESWBS structure is a natural

关键词： Aircraft carriers

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