3,985 research outputs found

    Apparatus for producing high purity silicon carbide crystals Patent

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    Device for producing high purity silicon carbide on carbon base by hydrogen reduction of silicon tetrachlorid

    Method of coating carbonaceous base to prevent oxidation destruction and coated base Patent

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    Vapor deposited laminated nitride-silicon coating for corrosion prevention of carbonaceous surface

    Solventless LARC-160 Polyimide Matrix Resin

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    The addition polyimide, LARC-160, which was originally synthesized from low cost liquid monomers as a laminating resin in ethanol, was prepared as a solventless, high viscosity, neat liquid resin. The resin was processed by hot-melt coating techniques into graphite prepreg with excellent tack and drape. Comparable data on graphite reinforced laminates made from solvent-coated and various hot-melt coated prepreg were generated. LARC-160, because of its liquid nature, can be easily autoclave processed to produce low void laminates. Liquid chromatographic fingerprints indicate good reaction control on resin scale ups. Minor changes in monomer ratios were also made to improve the thermal aging performance of graphite laminates

    Gas Bubbles Emerging from a Submerged Granular Bed

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    This fluid dynamics video was submitted to the Gallery of Fluid Motion for the 2009 APS Division of Fluid Dynamics Meeting in Minneapolis, Minnesota. In this video we show some results from a simple experiment where air was injected by a single nozzle at known constant flow rates in the bottom of a granular bed submerged in water. The injected air propagates through the granular bed in one of two modes. Mode 1 emergence involves small discrete bubbles taking tortuous paths through the interstitial space of the bed. Multiple small bubbles can be emitted from the bed in an array of locations at the same time during Mode 1 emergence. Mode 2 emergence involves large discrete bubbles locally fluidizing the granular bed and exiting the bed approximately above the injection site. Bead diameter, bead density, and air flow rate were varied to investigate the change in bubble release behavior at the top of the granular bed. This system is a useful model for methane seeps in lakes. Methane bubbles are released from the decomposition of organic matter in the lake bed. The initial size of the bubble determines how much of the gas is absorbed into the lake and how much of the gas reaches the surface and is released into the atmosphere. The size and behavior of the emerging bubbles may also affect the amount of vertical mixing occurring in the lake, as well as the mixing from the lake bed into the benthic layer.Comment: 2009 APS DFD Gallery of Fluid Motion Submissio

    ADOLESCENTS\u27 GENDER TYPICALITY, PSYCHOLOGICAL WELL-BEING, AND EXPERIENCES WITH TEASING, BULLYING, AND REJECTION

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    The current study examined whether adolescents’ gender-based victimization experiences (i.e., teasing, bullying, and rejection) mediated the association between gender typicality and psychological well-being. The current study also investigated whether daily experiences with the three types of gender-based victimization negatively impacted adolescents’ immediate emotional reactions. Participants were 570 seventh and eighth grade students (49.5% boys, 50.5% girls). During four visits over the course of two weeks, participants completed surveys about their own gender typicality, their psychological well-being (i.e., depression, anxiety, self-esteem, and body image), their experiences with gender-based teasing, bullying, and rejection, and their emotional responses to experiencing this victimization. Results indicated that experiences with gender-based teasing, bullying, and rejection mediated the association between gender typicality and psychological well-being. In addition, adolescents with worse initial psychological well-being and who experienced more rejection reported experiencing more negative emotional responses after victimization. The implications of these findings are discussed

    The Effect of Volunteering on the Attitudes of Selected Parents toward the Regular School Program

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    An applied project submitted in partial fulfillment of the requirements for the degree of Education Specialist at Morehead State University by Jewell A. Cline on May 6, 1977

    Plan of Gardens and First Floor Chateau Pathe

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    A plan of Gardens and first floor of Chateau Pathe in Seine, France which details locations of military offices and facilities on the grounds.https://corescholar.libraries.wright.edu/special_ms53_ephemera/1006/thumbnail.jp

    New Possibilities for the ESL Classroom: Toward an Appreciation of Creative Writing

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    This article addresses the gap between ESL and creative writing in college-level ESL writing courses. In ESL classrooms, creative writing activities may be implemented sporadically, but rarely, if ever, prove part of a standard, long-term curriculum. However, the benefits of utilizing creative writing in ESL classrooms are manifold. Highlighted here are various short-term studies and personal accounts that examine smaller creative writing assignments used in college ESL classroom settings. Gloria Anzaldúa has provided a philosophical rationale and springboard for engaging in this pedagogy and its potential wider applications, especially through her bi-lingual approach to creative scholarship. Felicia Rose Chavez’s anti-racist workshop model has provided a means for practical implementation of creative writing activities in the ESL classroom. Multiple studies in the ESL field confirm what Anzaldúa has always known: creativity empowers language learners

    Birth Injury in Relation to Mental Deficiency

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    The study of birth injury as a major cause of non-hereditary feeble-mindedness and as a category of mental subnormality is comparatively new but rapidly progressing. Some of the major aims of such a study have been to use orthopedic diagnosis and treatment and to perfect evaluation of mental examination methods for these cases as well as to develop better standards of measurement. The mental growth of these children is known to begin later and continue longer than that of other groups of defective children. This would indicate that training of a special type should begin early and continue beyond the usual limits. The value of muscle training in the earlier years of these children\u27s lives seems to be proving its value as a means of opening windows for their intellectual growth. Outside of the value of such a study to the children involved, there is the point of view of scientific research which indicates the better understanding of the relation of all adjustment to cerebral structure
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