802 research outputs found

    Impact of remote sensing upon the planning, management, and development of water resources

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    A survey of the principal water resource users was conducted to determine the impact of new remote data streams on hydrologic computer models. The analysis of the responses and direct contact demonstrated that: (1) the majority of water resource effort of the type suitable to remote sensing inputs is conducted by major federal water resources agencies or through federally stimulated research, (2) the federal government develops most of the hydrologic models used in this effort; and (3) federal computer power is extensive. The computers, computer power, and hydrologic models in current use were determined

    Measurement of electromagnetic interference in time-domain

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    Time-domain EMI measurement systems allow measurement time to be reduced by several orders of magnitude. In this paper a novel real-time operating time-domain EMI measurement system is presented. By the use of several analog-to-digital converters the dynamic range requested by the international EMC standards is achieved. A real-time operating digital signal processing unit is presented. The frequency band that is investigated is subdivided into several sub-bands. A novel implementation of the 9 kHz IF filter for the frequency 150 kHz to 1 GHz is presented. By this way the measurement time has been reduced by a factor of 8000 in comparison to conventional EMI receivers. During emission measurements performed with a modelled IF-bandwidth of 9 kHz the noise floor is decreased to −19 dBµV in the average detector mode by the implemented low noise power splitter. Measurements have been performed with the improved measurement system in the frequency range 30 MHz–1 GHz

    Impact of remote sensing upon the planning, management and development of water resources, appendix

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    Lists are presented of water resource agencies from the federal, state, Water Resources Research Institute, university, local, and private sectors. Information is provided on their water resource activities, computers, and models used. For Basic doc., see N75-25263

    Impact of remote sensing upon the planning, management, and development of water resources

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    Principal water resources users were surveyed to determine the impact of remote data streams on hydrologic computer models. Analysis of responses demonstrated that: most water resources effort suitable to remote sensing inputs is conducted through federal agencies or through federally stimulated research; and, most hydrologic models suitable to remote sensing data are federally developed. Computer usage by major water resources users was analyzed to determine the trends of usage and costs for the principal hydrologic users/models. The laws and empirical relationships governing the growth of the data processing loads were described and applied to project the future data loads. Data loads for ERTS CCT image processing were computed and projected through the 1985 era

    Pädiatrisches stumpfes thorakoabdominales Trauma: Damage-Control-Resuscitation-Therapie

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    Zusammenfassung: Die Primärversorgung von Kindern mit schwerem stumpfem Bauchtrauma und begleitender Azidose, Koagulopathie und Hypothermie (letale Trias) erfordert ein effizientes multidisziplinäres Therapieregime zur Reduktion der Mortalität. Ein 5,5Jahre alter Junge wurde auf einem Bergbauernhof zwischen Traktorhinterrad und Hoftorumrandung im Torsobereich eingequetscht. Es kam zu einer Milzruptur Grad IV, einer Leberruptur Grad III, einer Pankreaslazeration Grad III, einer beidseitigen Lungenkontusion und einem begleitenden Weichteiltrauma mit Rhabdomyolyse. Aufgrund des schweren Traumas mit Auftreten einer Koagulopathie und einer kombinierten metabolisch-respiratorischen Azidose erfolgten die Gabe von Blutprodukten anstelle der von Kristalloiden, Akzeptanz einer permissiven Hypotension, Stabilisierung der Körpertemperatur im Sinne einer Damage-Control-Resuscitation-Strategie sowie eine Milz erhaltende operative Versorgung mittels Laparotomie. Es wird ein mögliches Therapieregime für das pädiatrische schwere Trauma mit Massentransfusion (MT) diskutier

    Nuclear magnetic resonance measurements reveal the origin of the Debye process in monohydroxy alcohols

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    Monohydroxy alcohols show a structural relaxation and at longer time scales a Debye-type dielectric peak. From spin-lattice relaxation experiments using different nuclear probes an intermediate, slower-than-structural dynamics is identified for n-butanol. Based on these findings and on diffusion measurements, a model of self-restructuring, transient chains is proposed. The model is demonstrated to explain consistently the so far puzzling observations made for this class of hydrogen-bonded glass forming liquids.Comment: 4 pages, 4 figure

    The application of remote sensing to the development and formulation of hydrologic planning models

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    Regional hydrologic planning models built upon remote sensing capabilities and suited for ungaged watersheds are developed. The effectiveness of such models is determined along with which parameters impact most the minimization of errors associated with the prediction of peak flow events (floods). Emphasis is placed on peak flood prediction because of its significance to users for the purpose of planning, sizing, and designing waterworks

    Valuation of scleroderma and psoriatic arthritis health states by the general public

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    <p>Abstract</p> <p>Objective</p> <p>Psoriatic arthritis (PsA) and scleroderma (SSc) are chronic rheumatic disorders with detrimental effects on health-related quality of life. Our objective was to assess health values (utilities) from the general public for health states common to people with PsA and SSc for economic evaluations.</p> <p>Methods</p> <p>Adult subjects from the general population in a Midwestern city (N = 218) completed the SF-12 Health Survey and computer-assisted 0-100 rating scale (RS), time trade-off (TTO, range: 0.0-1.0) and standard gamble (SG, range: 0.0-1.0) utility assessments for several hypothetical PsA and SSc health states.</p> <p>Results</p> <p>Subjects included 135 (62%) females, 143 (66%) Caucasians, and 62 (28%) African-Americans. The mean (SD) scores for the SF-12 Physical Component Summary scale were 52.9 (8.3) and for the SF-12 Mental Component Summary scale were 49.0 (9.1), close to population norms. The mean RS, TTO, and SG scores for PsA health states varied with severity, ranging from 20.2 to 63.7 (14.4-20.3) for the RS 0.29 to 0.78 (0.24-0.31) for the TTO, and 0.48 to 0.82 (0.24-0.34) for the SG. The mean RS, TTO, and SG scores for SSc health states were 25.3-69.7 (15.2-16.3) for the RS, 0.36-0.80 (0.25-0.31) for the TTO, and 0.50-0.81 (0.26-0.32) for the SG, depending on disease severity.</p> <p>Conclusion</p> <p>Health utilities for PsA and SSc health states as assessed from the general public reflect the severity of the diseases. These descriptive findings could have implications regarding comparative effectiveness research for tests and treatments for PsA and SSc.</p
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