10,550 research outputs found

    LSS reference platform control

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    The long range objective of this task is to develop basic technology in the design, mechanization, and analysis of control systems for large flexible space structures. The focus of the FY'81 platform control effort was on the pointing control problems associated with multiple independently controlled experiment packages operating simultaneously on a single platform. Particular emphasis was placed on obtaining a quantitative comparison of controller performance with and without base motion compensation

    Humidity Graph of Saddleback Biotic Succession

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    This document reflects the succession of growth in the Saddleback research station. The old forest, it shows, was eventually replaced by stages of regrowth after logging, but never fully recovered

    Notes for Problems of Ecology Presentation to the Linfield Research Institute

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    These notes were prepared by Dr. Jane Claire Dirks-Edmunds for a presentation she gave to a Linfield Research Institute (LRI) seminar at Linfield College on March 19, 1957 on the subject of ecology. LRI was established in 1955, and Dr. Dirks-Edmunds did research under its auspices, including receiving a federal grant which funded work on biotic succession

    Biotic Succession in a Douglas Fir Forest on Saddleback Mountain (Oregon Coast Range)

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    This grant proposal, submitted to the National Science Foundation in 1959 by Dr. Jane Claire Dirks-Edmunds, requested funding to continue an ecological study at Saddleback Mountain. Dirks-Edmunds requested $15,570.05 to fund weekly trips with students to the site in order to collect meteorological and synecological data on the forest; she anticipated the project would last two years. Dr. Dirks-Edmunds graduated from Linfield College in 1937; she returned to teach in the Biology department at Linfield from 1941-1974

    A robust method for investigating galactic evolution in the submillimetre waveband: II the submillimetre background and source counts

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    This is the second of two papers describing a model of galactic evolution in the submillimetre waveband. The model incorporates a self-consistent treatment of the evolution of dust and stars, is normalized to the submillimetre properties of galaxies in the local universe, and can be used to make predictions for both disk and elliptical galaxies and for `closed-box', `inflow', and `outflow' models of galactic evolution. In Paper I we investigated whether it is possible to explain the extreme dust masses of high-redshift quasars and radio galaxies by galactic evolution. In this paper we use the model to make predictions of the submillimetre background and source counts. All our disk-galaxy models exceed at short wavelengths the submillimetre background recently measured by Puget et al. (1996). We also find that it is possible to fit the background over the entire wavelength range with a elliptical model but not with a disk model. We make source count predictions at 190 μ\mum for the ISOPHOT instrument on ISO and at 850 μ\mum for SCUBA. We show that the shape of the 850 μ\mu m source counts depends almost entirely on the mass spectrum of the radiating objects. Finally, we consider the limitations of the models. We find that one of the biggest uncertainties in the model is our lack of information about the submillimetre properties of nearby galaxies, in particular the lack of a direct measurement of the submillimetre luminosity function.Comment: 17 pages, 9 postscript figures, TEX, accepted by MNRA

    Doing pedagogical research in engineering

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    This is a book