The Experts below are selected from a list of 15948 Experts worldwide ranked by ideXlab platform
Thomas Lenigas - One of the best experts on this subject based on the ideXlab platform.
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rock paper scissors reflective practice for Design process in the novice landscape architect
Creative Industries Faculty, 2013Co-Authors: Jennifer Seevinck, Thomas LenigasAbstract:We describe a pedagogical approach that addresses challenges in Design education for novices. These include an inability to frame new problems and limited-to-no Design capability or domain knowledge. Such challenges can reduce student engagement with Design practice, cause derivative Design solutions as well as the inappropriate Simplification of Design assignments and assessment criteria by educators. We argue that a curriculum that develops the student’s Design process will enable them to deal with the uncertain and dynamic situations that characterise Design. We describe how this may be achieved and explain our pedagogical approach in terms of methods from Reflective Practice and theories of abstraction and creativity. We present a landscape architecture unit, recently taught, as an example. It constitutes Design exercises that require little domain or Design expertise to support the development of conceptual thinking and a Design rationale. We show how this approach (a) leveraged the novice’s existing spatial and thinking skills while (b) retaining contextually-rich Design situations. Examples of the Design exercises taught are described along with samples of student work. The assessment rationale is also presented and explained. Finally, we conclude by reflecting on how this approach relates to innovation, sustainability and other disciplines.
Jennifer Seevinck - One of the best experts on this subject based on the ideXlab platform.
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rock paper scissors reflective practice for Design process in the novice landscape architect
Creative Industries Faculty, 2013Co-Authors: Jennifer Seevinck, Thomas LenigasAbstract:We describe a pedagogical approach that addresses challenges in Design education for novices. These include an inability to frame new problems and limited-to-no Design capability or domain knowledge. Such challenges can reduce student engagement with Design practice, cause derivative Design solutions as well as the inappropriate Simplification of Design assignments and assessment criteria by educators. We argue that a curriculum that develops the student’s Design process will enable them to deal with the uncertain and dynamic situations that characterise Design. We describe how this may be achieved and explain our pedagogical approach in terms of methods from Reflective Practice and theories of abstraction and creativity. We present a landscape architecture unit, recently taught, as an example. It constitutes Design exercises that require little domain or Design expertise to support the development of conceptual thinking and a Design rationale. We show how this approach (a) leveraged the novice’s existing spatial and thinking skills while (b) retaining contextually-rich Design situations. Examples of the Design exercises taught are described along with samples of student work. The assessment rationale is also presented and explained. Finally, we conclude by reflecting on how this approach relates to innovation, sustainability and other disciplines.
Baldev Raj - One of the best experts on this subject based on the ideXlab platform.
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Unification of reactor elastomeric sealing based on material
European Nuclear Society, 2012Co-Authors: Sinha N. K., Baldev RajAbstract:The unification of elastomeric sealing applications of Indian nuclear reactors based on a few qualified fluoroelastomer/perfluoroelastomer compounds and standardized approaches for finite element analysis (FEA) based Design, manufacturing process and antifriction coatings is discussed. It is shown that the advance polymer architecture based Viton® formulation developed for inflatable seals of 500 MWe Prototype Fast Breeder Reactor (PFBR) and its four basic variations can encompass other sealing applications of PFBR with minimum additional efforts on development and validation. Changing the blend ratio of Viton® GBL 200S and 600S in inflatable seal formulation could extend its use to Pressurized Heavy Water Reactors (PHWRs). The higher operating temperature of Advanced Heavy Water Reactor (AHWR) seals expands the choice to perfluoroelastomers. FEA based on plane-strain/axisymmetric modeling (with Mooney–Rivlin as the basic constitutive model), seal manufacture by cold feed extrusion and injection molding as well as plasma Teflon-like coating belonging to two variations obtained from the development of inflatable seals provide the necessary standardization for unification. The gains in Simplification of Design, development and operation of seals along with the enhancements of safety and reliability are expected to be substantial
Sinha N. K. - One of the best experts on this subject based on the ideXlab platform.
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Unification of reactor elastomeric sealing based on material
European Nuclear Society, 2012Co-Authors: Sinha N. K., Baldev RajAbstract:The unification of elastomeric sealing applications of Indian nuclear reactors based on a few qualified fluoroelastomer/perfluoroelastomer compounds and standardized approaches for finite element analysis (FEA) based Design, manufacturing process and antifriction coatings is discussed. It is shown that the advance polymer architecture based Viton® formulation developed for inflatable seals of 500 MWe Prototype Fast Breeder Reactor (PFBR) and its four basic variations can encompass other sealing applications of PFBR with minimum additional efforts on development and validation. Changing the blend ratio of Viton® GBL 200S and 600S in inflatable seal formulation could extend its use to Pressurized Heavy Water Reactors (PHWRs). The higher operating temperature of Advanced Heavy Water Reactor (AHWR) seals expands the choice to perfluoroelastomers. FEA based on plane-strain/axisymmetric modeling (with Mooney–Rivlin as the basic constitutive model), seal manufacture by cold feed extrusion and injection molding as well as plasma Teflon-like coating belonging to two variations obtained from the development of inflatable seals provide the necessary standardization for unification. The gains in Simplification of Design, development and operation of seals along with the enhancements of safety and reliability are expected to be substantial
T M Carlson - One of the best experts on this subject based on the ideXlab platform.
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multi application small light water reactor final report
Other Information: PBD: 1 Dec 2003, 2003Co-Authors: S M Modro, J E Fisher, K D Weaver, J N Reyes, J T Groome, P Babka, T M CarlsonAbstract:The Multi-Application Small Light Water Reactor (MASLWR) project was conducted under the auspices of the Nuclear Energy Research Initiative (NERI) of the U.S. Department of Energy (DOE). The primary project objectives were to develop the conceptual Design for a safe and economic small, natural circulation light water reactor, to address the economic and safety attributes of the concept, and to demonstrate the technical feasibility by testing in an integral test facility. This report presents the results of the project. After an initial exploratory and evolutionary process, as documented in the October 2000 report, the project focused on developing a modular reactor Design that consists of a self-contained assembly with a reactor vessel, steam generators, and containment. These modular units would be manufactured at a single centralized facility, transported by rail, road, and/or ship, and installed as a series of self-contained units. This approach also allows for staged construction of an NPP and ''pull and replace'' refueling and maintenance during each five-year refueling cycle. Development of the baseline Design concept has been sufficiently completed to determine that it complies with the safety requirements and criteria, and satisfies the major goals already noted. The more significant features of the baseline single-unit Design concept include: (1) Thermal Power--150 MWt; (2) Net Electrical Output--35 MWe; (3) Steam Generator Type--Vertical, helical tubes; (4) Fuel UO{sub 2}, 8% enriched; (5) Refueling Intervals--5 years; (6) Life-Cycle--60 years. The economic performance was assessed by Designing a power plant with an electric generation capacity in the range of current and advanced evolutionary systems. This approach allows for direct comparison of economic performance and forms a basis for further evaluation, economic and technical, of the proposed Design and for the Design evolution towards a more cost competitive concept. Applications such as cogeneration, water desalination or district heating were not addressed directly in the economic analyses since these depend more on local conditions, demand and economy and can not be easily generalized. Current economic performance experience and available cost data were used. The preliminary cost estimate, based on a concept that could be deployed in less than a decade, is: (1) Net Electrical Output--1050 MWe; (2) Net Station Efficiency--23%; (3) Number of Power Units--30; (4) Nominal Plant Capacity Factor--95%; (5) Total capital cost--$1241/kWe; and (6) Total busbar cost--3.4 cents/kWh. The project includes a testing program that has been conducted at Oregon State University (OSU). The test facility is a 1/3-height and 1/254.7 volume scaled Design that will operate at full system pressure and temperature, and will be capable of operation at 600 kW. The Design and construction of the facility have been completed. Testing is scheduled to begin in October 2002. The MASLWR conceptual Design is simple, safe, and economical. It operates at NSSS parameters much lower than for a typical PWR plant, and has a much simplified power generation system. The individual reactor modules can be operated as on/off units, thereby limiting operational transients to startup and shutdown. In addition, a plant can be built in increments that match demand increases. The ''pull and replace'' concept offers automation of refueling and maintenance activities. Performing refueling in a single location improves proliferation resistance and eliminates the threat of diversion. Design certification based on testing is simplified because of the relatively low cost of a full-scale prototype facility. The overall conclusion is that while the efficiency of the power generation unit is much lower (23% versus 30%), the reduction in capital cost due to Simplification of Design more than makes up for the increased cost of nuclear fuel. The Design concept complies with the safety requirements and criteria. It also satisfies the goals for modularity, standard plant Design, certification before construction, construction schedule, refueling schedule, operation and maintenance, long plant life-cycle, and economics.