3,818 research outputs found

    The improved management of small-scale cage culture in Asia: final technical report

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    The purpose of the project is to develop sustained small-scale cage fish culture in inland and coastal waters through improved understanding of the social, institutional and resource environment of resource poor groups. Two Asian countries, Bangladesh (inland systems) and Vietnam (marine), were studied with this workshop bringing together both sides of the project together with representatives of collaborative institutions, government departments and universities. Addressing the overall aim of producing guidelines for the planning and extension of cage aquaculture in Asia a combination of group work and plenary discussion was conducted producing the following outputs. 1) An assessment of cage aquaculture potential, 2) Development options for small-scale cage culture, 3) A review of tools and methodologies and 4) Policy initiatives for sustainable cage culture development. Key issues raised were the use of outputs as a guide to be adapted to regional circumstances to facilitate farmer and extension worker discussion and not as a rigid methodology. The degree of linkage between development, research and government institutions was also considered a crucial factor in benefiting the research and development of cage culture at the local, regional and national level and vital in affecting the future policies by both development and government institutions. [PDF contains 242 pages

    A control volume based formulation of the discrete Kirchoff triangular thin plate bending element

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    A control volume method is presented for predicting the displacement and rotation of thin transversely loaded flat plates. The new procedure uses discrete Kirchoff triangle (DKT) elements but introduces a dual mesh of interconnected control volumes (CVs) centred on the finite element (FE) vertices. Discrete equations for the unknown degrees of freedom are subsequently derived by enforcing equilibrium on these CVs; as such this implementation is a quadrature free routine. To allow a comparison, a quadrature free implementation of the DKT element, using the standard finite element procedure, was developed using symbolic methematics. The CV based procedure is validated by patch tests for a state of pure bending and twist. Convergence tests for various loading types show enhanced performance for coarse meshes over the equivalent FE method

    Magnetosome vesicles are present before magnetite formation, and MamA is required for their activation

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    Bacterial magnetosomes are intracellular compartments that house highly ordered magnetite crystals. By using Magnetospirillum sp. AMB-1 as a model system, we show that magnetosome vesicles exist in the absence of magnetite, biomineralization of magnetite proceeds simultaneously in multiple vesicles, and biomineralization proceeds from the same location in each vesicle. The magnetosome-associated protein, MamA, is required for the formation of functional magnetosome vesicles and displays a dynamic subcellular localization throughout the growth cycle of magnetotactic bacteria. Together, these results suggest that the magnetosome precisely coordinates magnetite biomineralization and can serve as a model system for the study of organelle biogenesis in noneukaryotic cells

    The Young Man and the World (Part Two)

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    This book of advice, comprised of articles originally published in The Saturday Evening Post, is primarily directed toward young men, but also includes advice for men of all ages. In this second section of the book, Beveridge gives advice to young men considering a career as a lawyer or as a the leader of a church, and discusses public speaking and the history of the great speakers. Beveridge asserts that there are great things left for young men to do, expounding upon the virtues of the American and British governments. He also argues that a man who drinks too much, talks too much, or who thinks he can get along without the ennobling influence of women will not be successful (312), and that a young man\u27s highest glory is being American. Beveridge devotes the final chapters to discussing the world\u27s attitude toward the young man and the young man\u27s future in facing the world at fifty.https://openworks.wooster.edu/motherhomeheaven/1052/thumbnail.jp

    The Young Man and the World (Part One)

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    This book, comprised of articles originally published in The Saturday Evening Post, is primarily directed toward young men, but also includes advice for men of all ages. This first part of the book includes a chapter of general advice to young men, specifically a chapter devoted to the relationship of the young man to his home and especially his mother. Beveridge also devotes a chapter to whether young men should attend college and what young men who go to college ought to do versus what young men who do not attend college ought to do. In the final chapter of this section, Beveridge encourages young men to have families and create their own new home rather than devoting themselves single-mindedly to their careers.https://openworks.wooster.edu/motherhomeheaven/1051/thumbnail.jp

    Bantam System Technology Project Ground System Requirements Document

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    The Low Cost Booster Project (LCBP), also known as Bantam, is an element of the Advanced Space Transportation Program focused on Low Cost Booster Technologies. During FY 99 flight demonstrations are planned to demonstrate the feasibility of producing a booster capable of inserting a 150 kg payload into low earth orbit. The ground support system is an element of the full launch system. The ground support system provides for integration of the payload with the launch vehicle, preparation of the vehicle for launch (including maintenance, integration and test of the vehicle flight software), monitor and control of the launch sequence, range safety during launch, and collection of telemetry during the flight up to payload release. The ground support system is intended to make the maximum possible use of Government Off-the-Shelf (GOTS) or Commercial Off-the-Shelf (COTS) hardware and software to obtain the best value in terms of development operations support and ultimate life cycle cost for the launch system
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