189,506 research outputs found

    Design Guide for glass fiber reinforced metal pressure vessel

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    Design Guide has been prepared for pressure vessel engineers concerned with specific glass fiber reinforced metal tank design or general tank tradeoff study. Design philosophy, general equations, and curves are provided for safelife design of tanks operating under anticipated space shuttle service conditions

    Heather Landes and friends

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    Jean-Michel Damase, arr. Michael KocourPaul HindemithGary SchockerBen MilesVictor YoungMichael KocourGeorge Gershwi

    DEVELOPING COUNTRIES AND THE URUGUAY ROUND NEGOTIATIONS ON AGRICULTURE

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    International Relations/Trade,

    Some t-tests for N-of-1 trials with serial correlation

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    N-of-1 trials allow inference between two treatments given to a single individual. Most often, clinical investigators analyze an individual's N-of-1 trial data with usual t-tests or simple nonparametric methods. These simple methods do not account for serial correlation in repeated observations coming from the individual. Existing methods accounting for serial correlation require simulation, multiple N-of-1 trials, or both. Here, we develop t-tests that account for serial correlation in a single individual. The development includes effect size and precision calculations, both of which are useful for study planning. We then evaluate and compare their Type I and II errors and interval estimators to those of usual t-tests analogues via Monte Carlo simulation. The serial t-tests clearly outperform the usual t-tests commonly used in reporting N-of-1 results. Examples from N-of-1 clinical trials in fibromyalgia patients and from a behavioral health setting exhibit how accounting for serial correlation can change inferences. These t-tests are easily implemented and more appropriate than simple methods commonly used; however, caution is needed when analyzing only a few observations. Keywords: Autocorrelation; Cross-over studies; Repeated measures analysis; Single-case experimental design; Time-seriesComment: 23 pages, 6 figures, 6 table

    Analysis of filament reinforced metal-shell pressure vessels

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    Computer program analyzes design requirements and computes designs for metal-lined filament-wound pressure vessels with either geodesic /helical/ or in-plane filament winding patterns on the cylindrical portion and over the ends, reinforced by circumferential windings on the cylindrical portion

    Wideband wattmeter for instant measurement of real power

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    Portable, solid state wattmeter with wideband (dc to 1 MHz) linear multiplier which provides true four quadrant operation permitting instantaneous indication of real power as oscilloscope display is described

    Übersicht der nach Naturschutzrecht geschützten Gebiete und Objekte Sachsen-Anhalts und Informationen zu den Änderungen bei den Schutzgebieten sowie im Bestand der NATURA 2000-Gebiete im Jahr 2004

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    Im Landesamt für Umweltschutz wird gemäß §42 des Naturschutzgesetzes des Landes Sachsen-Anhalt das zentrale Naturschutzregister des Landes geführt. Alljährlich zum Jahresende findet mit den zuständigen Naturschutzbehörden ein Abgleich der jeweiligen Schutzgebiete und -objekte aller Schutzgebietskategorien statt; ein Resultat ist die vorliegende Schutzgebietsstatistik des Landes. Angaben zur Anzahl und zu den Flächen der Gebiete und Objekte sind zusammengefasst

    Reliability: an introduction

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    none3openBonzio S.; Landes J.; Osimani B.Bonzio, S.; Landes, J.; Osimani, B
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