1,963 research outputs found

    Remanufacturing as a potential means of attaining sustainable industrial development in Indonesia

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    Remanufacturing industries account for a considerable share of small medium enterprises (SMEs) in both developed and developing countries. There is an urgent need for a sustainable manufacturing strategy for remanufacturing SMEs in developing countries in order for them to gain global market competitiveness through minimizing environmental impact while maximizing the economic and social benefits of SME manufacturing activities. This research uses Indonesian remanufacturing SMEs as a case study for sustainable manufacturing in developing countries

    Technical Institute, Kevin Street : Prospectus, 1940- 41

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    Technical Institute, Kevin Street : Prospectus, 1941- 42

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    Electric systems

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    Postprint (published version

    CONTROL OF GAS METAL ARC WELDING USING PROCESS SENSING AND LASER ARC STABILIZATION FOR ADDITIVE MANUFACTURING

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    The goal of the present research was to bridge the gap between powder-based and wire-based additive manufacturing (AM) processes using gas metal arc welding (GMAW). Powder-based AM processes typically can produce components with high geometric resolution (small features), but at low deposition rates. Wire-based AM processes typically can produce components with low geometric resolution, but at high deposition rates. AM with GMAW is a wire-based AM process in the wire arc additive manufacturing (WAAM) category of AM. To bridge the gap between powder-based and wire-based AM processes, GMAW’s deposition rate has to be reduced, allowing small features to be built. The method proposed to build small features with GMAW was to develop a system, called GLADiS (GMAW laser assisted deposition integrated system), to perform an improved metal deposition strategy. The improved metal deposition strategy was composed of four components: single droplet deposition (SiDD), noncontact arc starting, electrode extension minimization, and laser arc stabilization. SiDD would allow single molten metal droplets to be deposited anywhere on a build plane rather than running continuous weld beads. SiDD would only be possible using an alternative, noncontact arc starting technique. Minimizing the electrode extension would allow the deposition rate to be reduced, while still maintaining sufficient current for droplet/substrate coalescence. Using a laser to stabilize the arc would ensure that individual droplets would be transferred to the correct location on the substrate. Results showed that GLADiS was capable of building extremely thin walls using SiDD. In addition, minimizing the electrode extension was found to improve droplet/substrate coalescence. The final system used a 532nm laser to assist in arc starting and to stabilize the arc. Linear wall specimens made of steel could be produced at a 0.1lb/hr deposition rate and with a wall thickness of 0.1in or less. Weld metal deposits produced by the SiDD process were found to have a microstructure composed of extremely small grains, indicating that it would have excellent strength and toughness. In addition, only a small number of voids were found in the deposits

    “No powers, man!”: A student perspective on designing university smart building interactions

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    Smart buildings offer an opportunity for better performance and enhanced experience by contextualising services and interactions to the needs and practices of occupants. Yet, this vision is limited by established approaches to building management, delivered top-down through professional facilities management teams, opening up an interaction-gap between occupants and the spaces they inhabit. To address the challenge of how smart buildings might be more inclusively managed, we present the results of a qualitative study with student occupants of a smart building, with design workshops including building walks and speculative futuring. We develop new understandings of how student occupants conceptualise and evaluate spaces as they experience them, and of how building management practices might evolve with new sociotechnical systems that better leverage occupant agency. Our findings point to important directions for HCI research in this nascent area, including the need for HBI (Human-Building Interaction) design to challenge entrenched roles in building management

    Technical Institute, Kevin Street : Prospectus, 1936-37

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    Extending starter motor life via optimization of commutation system parmeters

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    Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994, and Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1994.Includes bibliographical references (p. 60).by G. Johann R. Ochoco.M.S

    Corrosion Control in Industry

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    The economic development of any region, state or country, depends not only on its natural reâ sources and productive activities, but also on the infrastructure that account for the exploitaâ tion, processing and marketing of goods. Irrigation systems, roads, bridges, airports, maritime, land and air transport, school buildings, offices and housing, industrial installations are affectâ ed by corrosion and therefore susceptible to deterioration and degradation processes
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