8,132 research outputs found

    Vocabulary knowledge and reading

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    Includes bibliographical references (p. 35-43)Supported in part by the National Institute of Education under contract no. US-NIE-C-400-76-011

    Word meanings

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    From present to future : beyond becoming a nation of readers

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    Includes bibliographical references (p. 13-19)The work upon which this publication was based was supported in part by the Office of Educational Research and Improvement under Cooperative Agreement No. OEG 0087-C100

    Sand and gravel resources of Champaign County, Illinois.

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    Cover title.Bibliography: p. 15

    The Contributions of J. A. Udden to an Understanding of Iowa Geology

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    Johan August Udden served on the faculty of Augustana College from 1888 until 1911. His research during that time was directed toward an understanding of the geology of areas close at hand, the region around Rock Island and nearby areas in Iowa and Illinois. Udden\u27s most significant contributions to Iowa geology were in his treatment of 1) Paleozoic, Cretaceous, and Quaternary stratigraphy; 2) subsurface geology, including information on bedrock elevations and topography; 3) characteristics and origin of the loess. Most of this information was included in the Annual Reports of the Iowa Geological Survey published between 1899 and 1903. He made important contributions to the study of the Devonian of eastern Iowa. He was the first to recognize cyclic sedimentation in Pennsylvanian strata. He compiled subsurface information on the thickness of Pennsylvanian rocks in Jefferson County and was probably among the first to present such information on a map. He prepared what may be the earliest maps of bedrock topography, in Muscatine and Louisa counties. He was an unwavering proponent of the eolian hypothesis for the origin of loess. He noted that modern wind deposits have the same particle-size distribution as does the loess, and in the process of making these analyses he devised a widely used size-grade scale

    Containerless high temperature property measurements

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    Containerless processing in the low gravity environment of space provides the opportunity to increase the temperature at which well controlled processing of and property measurements on materials is possible. This project was directed towards advancing containerless processing and property measurement techniques for application to materials research at high temperatures in space. Containerless high temperature material property studies include measurements of the vapor pressure, melting temperature, optical properties, and spectral emissivities of solid boron. The reaction of boron with nitrogen was also studied by laser polarimetric measurement of boron nitride film growth. The optical properties and spectral emissivities were measured for solid and liquid silicon, niobium, and zirconium; liquid aluminum and titanium; and liquid Ti-Al alloys of 5 to 60 atomic pct. titanium. Alternative means for noncontact temperature measurement in the absence of material emissivity data were evaluated. Also, the application of laser induced fluorescence for component activity measurements in electromagnetic levitated liquids was studied, along with the feasibility of a hybrid aerodynamic electromagnetic levitation technique

    Visualization of hydrogen injection in a scramjet engine by simultaneous PLIF imaging and laser holographic imaging

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    Flowfield characterization has been accomplished for several fuel injector configurations using simultaneous planar laser induced fluorescence (PLIF) and laser holographic imaging (LHI). The experiments were carried out in the GASL-NASA HYPULSE real gas expansion tube facility, a pulsed facility with steady test times of about 350 microsec. The tests were done at simulated Mach numbers 13.5 and 17. The focus of this paper is on the measurement technologies used and their application in a research facility. The HYPULSE facility, the models used for the experiments, and the setup for the LHI and PLIF measurements are described. Measurement challenges and solutions are discussed. Results are presented for experiments with several fuel injector configurations and several equivalence ratios

    What Makes a Movie

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    Perhaps when the conditions of film projection will change, through technical progresses which promise to allow us to have access at will to films, it may be possible to walk leisurely, to wander, to loaf about, stroll and loiter …delighted to explore the ordered depth of a film, to appreciate a thousand details in a sequence while experiencing the unique character of the whole. This quote from Baudry looked forward from the conclusion of our early piece “Access to Moving Image Documents,” published before the availability of digital computational tools. The digital environment has provided the stage for Baudry’s vision, as well as for the resolution of Bellour’s observation that film is ‘unattainable, in the sense of introuvable, by being literally and figuratively unquotable, everlastingly slipping through in the instance of being identified, seized for closer scrutiny.’ The digital environment enables access at the frame level, with idiosyncratic movements through a filmic text being now almost trivial. However, the mechanics of access to the smallest units of video documents does not, in and of itself, resolve the issues of just how to wander, loaf, and delight; nor does such access necessarily make obvious how we might make sense of videos

    An Integrated Surface Seismic/Seismic Profile Case Study: Simonette Area, Alberta

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    On the basis of conventional surface seismic data, the 13-15-63-25W5M exploratory well was drilled into a low-relief Leduc Formation reef (Devonian Wood-bend Group) in the Simonette area, west-central Alberta, Canada. The well was expected to intersect the crest of the reef and encounter about 50-60 m of pay; unfortunately it was drilled into a flank position and abandoned. The decision to abandon the well, as opposed to whipstocking in the direction of the reef crest, was made after the acquisition and interpretive processing of both near-and far-offset (252 and 524 m, respectively) vertical seismic profile (VSP) data, and after the reanalysis of existing surface seismic data
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