3,134 research outputs found

    Space Shuttle payload handling on the launch pad

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    A payload change-out room developed to provide a controlled environment and the structural platform for a payload ground handling mechanism (PGHM), which performs the actual installation or removal of the payload is described. Design efforts to develop a PGHM compatible with the free-standing launch vehicle and the payload change-out room housing are discussed. Requirements of the PGHM considered include compensation for structural deflections resulting from wind forces and the transfer of the payload weight and protection for the payload, the orbiter, and the PGHM itself against damaging impacts that could occur during such deflections

    An examination of the potential applications of automatic classification techniques to Georgia management problems

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    Automatic classification techniques are described in relation to future information and natural resource planning systems with emphasis on application to Georgia resource management problems. The concept, design, and purpose of Georgia's statewide Resource AS Assessment Program is reviewed along with participation in a workshop at the Earth Resources Laboratory. Potential areas of application discussed include: agriculture, forestry, water resources, environmental planning, and geology

    On the Factorization of Graphs with Exactly One Vertex of Infinite Degree

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    AbstractWe give a necessary and sufficient condition for the existence of a 1-factor in graphs with exactly one vertex of infinite degree

    Note on a theorem of J. Folkman on transversals of infinite families with finitely many infinite members

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    In this note we show by a simple direct proof that Folkman's necessary and sufficient condition for an infinite family of sets with finitely many infinite members to have a transversal implies Woodall's condition. A short proof of Folkman's theorem results by combining with Woodall's proof

    A Stylised Model for Extreme Shocks: Four Moments of the Apocalypse

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    We present a method for calculating the extreme tail quantiles, over arbitrary holding periods, of a continuous-time stochastic volatility model of the form proposed by Scott (1987) with correlation between the processes for volatility and price. The fat tails of this model enable a consistent, tuneable, stylised representation of non-normality in extreme moves of prices across diering markets. Because the model is analytically intractable, four moments are derived by numeric integration and matched to a one-period version of the model, whose quantiles are then found by further numeric integration. We also present a novel Monte-Carlo simulation scheme, which we have used to confirm the accuracy of the moment-matching approximation for quantiles as extreme as one-millionth. Two methods for calibrating the model to market data are also proposed. The model is used in production stress testing at nabCapital to define consistent real-world probabilities for extreme shocks over heterogeneous holding periods.

    Reconciling quality and quantity

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    "In FEAST’s previous Discussion Papers we have demonstrated a series of bibliometric methodologies useful for policy-makers to quickly attain a grasp of their country’s international research positioning and relative performance. This paper extends these concepts by applying several measures at once in order to demonstrate more clearly, from a broad country-level perspective, those countries with which Australia gains a comparative advantage by collaborating. This technique allows for policy-makers to target only those countries that provide a clear justification for doing so, in particular by combining quality measures with output volumes." - page 2Australian National Universit

    PANGEA - Attività fisica e nutrizione per un invecchiamento di qualità

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    Kitapçılığımızın gelişmesi etrafında:B. Vecihi Görk editörlerin raporlarındaki noksanlara işaret ediyor

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    Taha Toros Arşivi, Dosya No: 111-Kütüphanelerİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033
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