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On the contribution of solar energy to sustainable developments goals: Case study on Mohammed bin Rashid Al Maktoum Solar Park

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International Journal of Thermofluids 2021年 12卷

作者： Obaideen, Khaled Nooman AlMallahi, Maryam Alami, Abdul Hai Ramadan, Mohamad Abdelkareem, Mohammad Ali Shehata, Nabila Olabi, A.G. Faculty of Engineering and Built Environment SEGi University 47810 Petaling Jaya Selangor Malaysia Dept. of Sustainable and Renewable Energy Engineering University of Sharjah P.O. Box Sharjah27272 United Arab Emirates Sustainable Energy & Power Systems Research Centre RISE University of Sharjah P.O. Box Sharjah27272 United Arab Emirates Center for Advanced Materials Research University of Sharjah P.O. Box Sharjah27272 United Arab Emirates International University of Beirut PO Box Beirut146404 Lebanon Lebanese International University Beirut Lebanon Chemical Engineering Department Minia University Elminia Egypt Environmental Science and Industrial Development Department Faculty of Postgraduate Studies for Advanced Sciences Beni-Suef University Egypt Mechanical Engineering and Design Aston University School of Engineering and Applied Science Aston Triangle BirminghamB4 7ET United Kingdom

With the fast growth of the global economy, energy supply and demand have a strong impact on social, economic, and environmental aspects. As a consequence, this has pushed the decision-makers to formulate objectives, guiding economic policies toward sustainable goals. The process is known as Sustainable Development Goals (SDGs) that have been proposed by the United Nations. This being said, the energy sector is a vital domain with a vast potential for improvments in terms of technologies and ligistalations. Solar energy is among the most efficient solutions proposed to reduce the economic and environmental footprints of energy. In this frame, the current paper aims to localize solar energy within SDGs and analyze the contribution of the solar energy towards the achievement of the SDGs. Moreover, the current work highlights the contributions of Mohammed bin Rashid Al Maktoum (MbR) Solar Park in the United Arab Emirates to achieving the SDGs. Indeed, the MbR Solar Park concept offers valuable insights of environmental impacts by deploying clean and affordable energy sources in place of conventional fossil fuel power plants that are still heavily used in the region. The MbR Solar Park operation has already mitigated 6.5 million tonnes of carbon dioxide equivalent and this number will likely rise when all phases are installed and operational. Moreover, it has been shown that MbR Solar Park achieve several SDGs such SDG 8: decent work and economic growth, SDG 9: industry, innovation and infrastructure, SDG 11: sustainable cities and communities, and SDG 15: life on land. © 2021 The Authors

关键词： Sustainable development

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Design and Development of A Cryogenic Pumping Evaluation Facility

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Naval Engineers Journal 1966年第2期78卷 309-320页

作者： Albero, M. The Author graduated from Lafayette College in 1957 with a B.S. in Chemical Engineering. Upon graduation he was assigned to USS NEWPORT NEWS (CA-148) followed by a tour as Chief Engineer of the USS DUPONT (DD-941). From June 1962 to June 1965 he attended a postgraduate course in Mechanical Engineering at the United States Naval Postgraduate School Monterey California and was awarded a Master of Science degree. While at the postgraduate school the work described in this paper was performed as a thesis and was supported by the Office of Naval Research through the Foundation Research Program of the U. S. Naval Postgraduate School. He is currently serving as Planning and Estimating Officer in the office of the Supervisor of Shipbuilding U. S. Navy Bath Maine. He is a member of the American Society of Naval Engineers Sigma Xi and the American Society of Mechanical Engineers.

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AN APPROACH TO SHIPbOARD ICING PRObLEM

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NAVAL ENGINEERS JOURNAL 1968年第1期80卷 63-&页

作者： LANDY, M FREIbERG.A Milton Landy received his B.A. and M.A. Degrees in Chemistry at Brooklyn College Brooklyn New York and is presently studying for his PH.D. Degree at the Polytechnic Institute of Brooklyn. Since 1957 he has been a Physical Chemist with the U.S. Naval Applied Science Laboratory where he has done fundamental and applied research in the fields of ice adhesion and ice release coatings. 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.

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Alkali-Activated Eco-Friendly Mixtures with Low-Processed Sugarcane bagasse Ash—Physical, Mechanical, and Microstructural Properties

SSRN

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SSRN 2022年

作者： Lima, Victor Estolano de Estolano, Amanda Marques Lopes Almeida, Yeda Medeiros bastos de Henrique, Mariana Alves Araújo, Fernanda Wanderley Corrêa de Melo Neto, Antonio Acacio de Federal University of Pernambuco Department of Civil and Environmental Engineering LabTag Av. da Arquitetura Recife Brazil Federal University of Pernambuco National Institute of Welding Technology and Coating of Materials INTM Rua da Inovação Recife Brazil Federal University of Pernambuco Institute for Petroleum and Energy Research LITPEG Petrochemical Laboratory Av. da Arquitetura Recife Brazil Federal University of Pernambuco Postgraduate Program in Materials Science Av. Jorn. Aníbal Fernandes Recife Brazil Federal Rural University of Pernambuco Department of Rural Technology Rua Cento e Sessenta e Três Cabo de Santo Agostinho Brazil

In this study, sugarcane bagasse ash was used to evaluate the physical, mechanical, and microstructural properties of eco-friendly alkali-activated mixtures with blast furnace slag. Net sodium silicate and solid metasilicate were used as activators to produce conventional and one-part alkali-activated mixtures, respectively. Two types of sugarcane bagasse ash were analyzed: raw (as-received) and calcined. The low number of proposed processes reduces the economic aggregate cost of recycled ash. Further, the blast furnace slag replacement ratios of raw and calcined sugarcane bagasse ash were 10%, 30%, 50%, and 70%. Mortars were prepared for the compressive and flexural strength tests, water absorption, and dry density. Alternatively, X-ray diffraction, thermogravimetry, infrared spectroscopy, and scanning electron microscopy were used to assess the chemical, mineralogical, and microstructural properties of the prepared pastes. In addition, the fresh test was performed using the flow table test, wherein the spread diameter decreased as the SbA content increased, primarily on the raw ash owing to its high organic material content. Moreover, compressive strength results showed that the compressive strength increased after 3 days for mixtures with 10% and 30% SbA. However, at 28 days, there was a decrease with an increase in the SbA content. Similar behavior was observed in the flexural strength and water absorption tests. Tests on pastes verified the probable presence of alternative phases besides C-(A)-S-H, such as pectolite, brucite, hydrotalcite, and zeolites. In addition, through the combination of scanning electron microscopy and energy dispersive spectroscopy techniques, the presence of preserved cellular structure was observed in the alkali-activated matrix, and Ca/Si and Si/Al ratios were calculated. It was concluded that the low reactivity of raw sugarcane bagasse ash and the low reactivity of both ashes significantly decreased mechanical performance. Furthermor

关键词： Slags

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Unifying femtosecond and picosecond single-pulse magnetic switching in GdFeCo

arXiv

引用

arXiv 2020年

作者： Jakobs, F. Ostler, T.A. Lambert, C.-H. Yang, Y. Salahuddin, S. Wilson, R.b. Gorchon, J. bokor, J. Atxitia, U. Dahlem Center for Complex Quantum Systems and Fachbereich Physik Freie Universität Berlin Berlin14195 Germany LiégeB-4000 Belgium College of Business Technology and Engineering Sheffield Hallam University Howard Street SheffieldS1 1WB United Kingdom Department of Electrical Engineering and Computer Sciences University of California BerkeleyCA94720 United States Department of Materials Science and Engineering University of California BerkeleyCA94720 United States Lawrence Berkeley National Laboratory 1 Cyclotron Road BerkeleyCA94720 United States Department of Mechanical Engineering and Materials Science and Engineering Program University of California RiversideCA92521 United States ETH Zurich Hönggerbergring 64 Zürich8093 Switzerland Portland Technology Development Department Intel Corp. HillsboroOR97006 United States Universite de Lorraine CNRS IJL NancyF-54000 France

Many questions are still open regarding the physical mechanisms behind the magnetic switching in GdFeCo alloys by single optical pulses. Phenomenological models suggest a femtosecond scale exchange relaxation between sublattice magnetization as the driving mechanism for switching. The recent observation of thermally induced switching in GdFeCo by using both several picosecond optical laser pulse as well as electric current pulses has questioned this previous understanding. This has raised the question of whether or not the same switching mechanics are acting at the femoand picosecond scales. In this work, we aim at filling this gap in the understanding of the switching mechanisms behind thermal single-pulse switching. To that end, we have studied experimentally thermal single-pulse switching in GdFeCo alloys, for a wide range of system parameters, such as composition, laser power and pulse duration. We provide a quantitative description of the switching dynamics using atomistic spin dynamics methods with excellent agreement between the model and our experiments across a wide range of parameters and timescales, ranging from femtoseconds to picoseconds. Furthermore, we find distinct element-specific damping parameters as a key ingredient for switching with long picosecond pulses and argue, that switching with pulse durations as long as 15 picoseconds is possible due to a low damping constant of Gd. Our findings can be easily extended to speed up dynamics in other contexts where ferrimagnetic GdFeCo alloys have been already demonstrated to show fast and energy-efficient processes, e.g. domain-wall motion in a track and spin-orbit torque switching in spintronics devices. Copyright © 2020, The Authors. All rights reserved.

关键词： Ternary alloys

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Characteristics of Leachate at Sukawinatan Landfill, Palembang, Indonesia

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Journal of Physics: Conference Series 2013年第1期423卷

作者： Eka Sri Yusmartini Dedi Setiabudidaya Ridwan Marsi Faizal PhD Candidate Postgraduate Program Sriwijaya University Indonesia Department of Physics Faculty of Mathematics and Science Sriwijaya University Indonesia Nuclear Industrial Materials Technology Centre Serpong Indonesia Faculty of Agriculture Sriwijaya University Indonesia Department of Chemical Engineering Faculty of Engineering Sriwijaya University Indonesia

Landfill (TPA) Sukawinatan Palembang is an open dumping system which covers an area of 25 hectares. This system may bring an environmental damage to the surrounding area because it does not provide leachate treatment. Leachate is the landfill waste that dissolves many compounds that contain pollutants from both organic substances and heavy metal origin. This paper presents the results of laboratory analysis on samples of leachate as well as shallow groundwater from the surrounding area. The results were compared to established quality standards to evaluate whether the leachate has influenced the quality of the shallow groundwater in the surrounding area. The results show that there are some indications that the quality of groundwater has been polluted by the leachate of both organic substances and heavy metals produced by the Sukawinatan landfill.

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FLAMMAbILITY AND TOXICITY OF COMPOSITE-materials FOR MARINE VEHICLES

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NAVAL ENGINEERS JOURNAL 1990年第5期102卷 45-54页

作者： SEVART, JL GRIFFIN, OH GURDAL, Z WARNER, GA Jeffrey L. Sevart:is a native of Kansas and a 1985 graduate of Kansas State University with a B.S. in mechanical engineering (magna cum laude). After working as a stress analysis engineer at Boeing Military Airplane Company in Wichita Kans. he attended Virginia Polytechnic Institute and State University and received an M.S. in engineering mechanics in February 1988. He currently resides in Akron Ohio working as a research engineer in tire composites research at The Goodyear Tire and Rubber Company. O. Hayden Griffin Jr.:received his B.S. and M.S. in mechanical engineering from Texas Tech University in 1970 and 1971 respectively. He received his Ph.D. in engineering mechanics from Virginia Polytechnic Institute and State University in 1980. Prior to joining the faculty of Virginia Polytechnic Institute and State University as associate professor of engineering science and mechanics in September 1985 he was employed at the U.S. Naval Surface Warfare Center (Dahlgren Virginia) BF Goodrich Tire Group (Akron Ohio) the Bendix Advanced Technology Center (Columbia Maryland) and the Johns Hopkins University Applied Physics Laboratory (Laurel Maryland). He is currently an associate director of the Virginia Institute for Material Systems. He is a registered professional engineer in Virginia and is a member of the American Society of Mechanical Engineers and the American Society for Composites. Zafer Gürdal:received his M.S. in mechanical and aerospace engineering from Illinois Institute of Technology in 1981 and his Ph.D. in aerospace engineering from Virginia Polytechnic Institute and State University in 1985. He worked as a research associate in the Aerospace and Ocean Engineering Department at Virginia Tech before joining the Engineering Science and Mechanics Department as an assistant professor in September 1985. Professor Gürdal's research interests include: composite structures failure mechanics of composites structural optimization and damage tolerant design. He is a member of the American Institute

Characteristics of both thermoplastic and thermoset composite materials as they pertain to marine vehicle applications are discussed. Comparison of various material selection factors such as strength, damage and moisture resistance, and flammability and toxicity as well as cost and availability of thermoset and thermoplastic composite materials are presented. Methods for testing and reducing the flammability and toxicity are discussed. Many commercially available composite systems are reported to provide favorable characteristics for marine applications. Although there seems to be a need for improved production technology for thermoplastics, they present potential advantages in physical properties over thermoset composites.

关键词： Composite materials

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DEVELOPMENT OF IMPROVED PROTECTIVE COATINGS FOR SONAR DOMES

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Naval Engineers Journal 1967年第4期79卷 593-600页

作者： CIZEK, A.W. PETITO, N.J. Albert W. Cizek Jr. received a B.S. in Mechanical Engineering from New York University. He has been employed at the U.S. Naval Applied Science Laboratory since 1940. From 1940 to 1962 he was in charge of the Coating Section of the Laboratory. Currently he is the principal investigator in the Laboratory's programs on deck coatings and walkway materials structural vibration damping materials sonar dome protective coatings and anechoic coatings. Nicholas J. Petito received a B.S. in Chemical Engineering from Pratt Institute School of Science and Technology. He has been employed at the U.S. Naval Applied Science Laboratory since 1947 in the field of Paint Technology. Currently he is an investigator in the Laboratory's program for the development of sonar dome coatings and anti-fouling paints.

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Composite skyrmion bags in two-dimensional materials

arXiv

引用

arXiv 2018年

作者： Foster, David Kind, Charles Ackerman, Paul J. Tai, Jung-Shen b. Dennis, Mark R. Smalyukh, Ivan I. H. H. Wills Physics Laboratory University of Bristol BristolBS8 1TL United Kingdom School of Mathematics University of Bristol BristolBS8 1TW United Kingdom Department of Physics and Soft Materials Research Center University of Colorado BoulderCO80309 United States School of Physics and Astronomy University of Birmingham BirminghamB12 2TT United Kingdom Department of Electrical Computer and Energy Engineering Materials Science and Engineering Program University of Colorado BoulderCO80309 United States Renewable and Sustainable Energy Institute National Renewable Energy Laboratory and University of Colorado BoulderCO80309 United States

Skyrmions are particle-like topological excitations, studied in various condensed matter systems and models of high-energy physics (HEP). They occur as stable spin textures in certain planar magnetic materials [1-4] and as configurations in chiral nematic liquid crystals [5], having been originally proposed as model of atomic nuclei [10]. Since magnetic Skyrmions can be accelerated with a current [6-8], they have the potential to encode bits in low-power magnetic storage devices [9]. Drawing on techniques from HEP, we demonstrate that magnetic and liquid crystal Skyrmions interact like orientation dependent, localised particles, explaining previously observed Skyrmion behaviour. This interaction motivates the construction of Skyrmion bags: Textures of high topological degree which we realise experimentally in liquid crystals, and in magnetic materials by computer simulations. These Skyrmion bags configurations are nested multiple Skyrmions, which act like single Skyrmions in pairwise interaction, and under the inuence of a current in magnetic materials. These results emphasize equivalent Skyrmion behaviour in different physical systems, and suggest new, high-density magnetic memory storage devices based on Skyrmion bags. Copyright © 2018, The Authors. All rights reserved.

关键词： Magnetic storage

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Antimicrobial Potential of Linear Low-Density Polyethylene Food Packages with Ag Nanoparticles in Different Carriers (Sio2 and Hap)

SSRN

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SSRN 2023年

作者： da Costa brito, Sabrina Pereira, Vinicius Alex Cano Prado, Ana Carolina Figueiredo Tobias, Thais Juliana Paris, Elaine Cristina Ferreira, Marcos David São Paulo State University "Julio de Mesquita Filho" Rod. Araraquara Jaú Km 01 SP Araraquara14800-903 Brazil Embrapa Instrumentação Rua XV de Novembro 1452 SP São Carlos13560-970 Brazil Biotechnology Graduate Program Federal University of São Carlos Rod. Washington Luís Km 235 – C. P.676 SP São Carlos13.565-905 Brazil Postgraduate Program in Materials Science and Engineering Federal University of São Carlos Rod. Washington Luís Km 235 – C. P.676 SP São Carlos13.565-905 Brazil Chemistry Graduate Program University of Sao Paulo Av. Trabalhador São-carlense 400 SP São Carlos13.560-970 Brazil Postgraduate Program in Chemistry Federal University of São Carlos Rod. Washington Luís Km 235 – C. P.676 SP São Carlos13.565-905 Brazil

This study intended to verify the antimicrobial efficacy of linear low-density polyethylene films incorporated with silver nanoparticles dispersed in silica and hydroxyapatite carriers at different concentrations. The silver nanoparticles showed a superior inhibitory action on S. aureus and hydroxyapatite was more effective, being this a potential for use in food packaging. © 2023, The Authors. All rights reserved.

关键词： Polymer films

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