6,816 research outputs found

    Antenna grout replacement system

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    An epoxy grout suitable for use in mounting and positioning bearing runner plates used in hydrostatic bearing assemblies for rotatably mounting large radio telescope structures to stationary support pedestals is described. The epoxy grout may be used in original mountings or may be used as part of a replacement system for repairing cavities in existing grout resulting from grout deterioration. The epoxy grout has a relatively short work life and cure time even in the presence of hydraulic oil. The epoxy grout cures without shrinking or sagging to form a grout which is sufficiently strong and durable to provide a grout especially well suited for use under the high pressure loading and close tolerance requirements of large hydrostatic bearing assemblies

    Direct Laser Sintering of Borosilicate Glass

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    Despite the advantages that selective laser sintering (SLS) offers in terms of material availability, many materials have yet to be explored for feasibility and even fewer are available on a commercial basis. This paper presents initial investigations for one such material, borosilicate glass, which could be of particular interest to filter manufacturers because it presents an attractive alternative to the conventional, time-consuming way of producing filters of various porosity classes. Process results are presented including a determination of the optimal parameter window and the effect of processing parameters on the density and surface quality. The effects of thermal post-processing and the inclusion of an additive are also discussed.Mechanical Engineerin

    Profit Limitation Controls Prior to the Present War

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    In March 2014, four organisations, the Global School (Den Globala Skolan), the Swedish International Centre of Education for Sustainable Development (SWEDESD) at Uppsala University, the Swedish National Commission for UNESCO (Svenska UnescorĂ„det) and WWF-Sweden commissioned Anders Jidesjö, senior lecturer and researcher at Linköping University, to undertake a study of the Swedish experience in the domain of Education for Sustainable Development (ESD) over the last 10 years by analysing relevant background documentation and reports as well as information gathered through interviews with key informants. This report presents the result of this study. An earlier version served as background document for the "ESD – Call for Action" event on 3 June 2014 (see also below). The current version has benefited from incorporating factual information and insights presented during that event. The report was commissioned in view of the UNESCO World Conference on Education for Sustainable Development, scheduled for 11-12 November in Aichi-Nagoya, Japan. This conference will mark the end of the UN Decade on Education for Sustainable Development, 2005-2014. The four organisations considered that the official Swedish position at the Nagoya Conference would be strengthened if informed by the experiences and insights of Swedish pre-schools, schools, universities, municipalities and public, private and non-governmental organizations that over the last ten years and longer have engaged in education and learning for sustainable development. The official Swedish position would also be bolstered by having politicians, policy makers and experts reflect on these experiences and formulate recommendations for reinforced policy and accelerated and effective practice and research in the ESD domain. To this effect, the four organizations organized the event "ESD – Call for Action", on 3 June at BlĂ„senhus, Uppsala University. It brought together 120 representatives of Swedish ESD-related practitioners, researchers and policy makers who together formulated an extensive set of recommendations that are meant to support the Swedish delegation attending the Nagoya Conference. The report and the 3 June recommendations will be made available to the participants of a second event "Making ESD Action Possible", scheduled for 27 August, 2014 at Rosenbad Conference Centre, Stockholm. This event is expected to assemble 140 Swedish ESD-related politicians, policy makers, researchers and practitioners. The combined recommendations formulated by the participants during the two events will be submitted to the official Swedish delegation to the Nagoya Conference. August 2014 Den Globala Skolan (the Global School), Svenska UnescorĂ„det (Swedish National Commission for UNESCO), Swedish International Centre of Education for Sustainable Development (SWEDESD) at Uppsala University, WWF-Swede

    A methodology to allow avalanche forecasting on an information retrieval system

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    This paper presents adaptations and tests undertaken to allow an information retrieval (IR) system to forecast the likelihood of avalanches on a particular day. The forecasting process uses historical data of the weather and avalanche conditions for a large number of days. A method for adapting these data into a form usable by a text-based IR system is first described, followed by tests showing the resulting system’s accuracy to be equal to existing ‘custom built’ forecasting systems. From this, it is concluded that the adaptation methodology is effective at allowing such data to be used in a text-based IR system. A number of advantages in using an IR system for avalanche forecasting are also presented
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