366 research outputs found

    Ground-water records of Flagler, Putnam, and St. Johns Counties, Florida

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    An investigation of the geology] and ground-water resources of Flagler, Putnam, and St. Johns counties, Florida, was made during the period November 1955 through 1958 by the U. S. Geological Survey in cooperation with the Florida Geological Survey. The results of this investigation have been published by the Florida Geological Survey in the following reports: Information Circular 13 entitled, "Interim Report on the Ground-Water Resources of Flagler County, Florida," by Boris J. Bermes; Information Circular 14 entitled, "Interim Report on the Ground- Water Resources of St. Johns County, Florida," by George R. Tarver; Information Circular 15 entitled, "Interim Report on the Ground-Water Resources of Putnam County, Florida," by Gilbert W. Leve; and Report of Investigations 32 entitled, "Geology and Ground-Water Resources of Flagler, Putnam, and St. Johns counties, Florida," by B. J. Bermes, G. W. Leve, and George R. Tarver. Report of Investigations 32 includes most of the information contained in the interim reports and in addition includes the results of the full period of investigation covering the entire area. The tabular material presented herewith contains all of the records that were not included in Report of Investigations 32. (Document contains 97 pages.

    Health Conditions of Negroes in Beaumont, Texas, and Their Implications for Health Education

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    The problem dealt with in this study is the status of health of Negroes in Beaumont, Texas; how these conditions may be improved and the extent to which these conditions and problems may be solved through health education. Suggested activities that the community might use, desired outcomes of the activities, agencies through which the program might work are set forth in this study. This study is a survey and examination of the habits and living conditions of Negroes of Beaumont, for the purpose of determining the nature and extent of the conditions and problems. The writer plans, in this study, to find out the health habits and practices of the families studied, the availability of community health services, the environmental conditions of Negroes, and to determine the extent to which health education can remedy these conditions. This study will be made of health conditions of Negroes in Beaumont, Texas, based on a survey of 100 Negro families in the city. The data is pertaining to a program of health education for the community, a study of work done and facilities of health for Negroes, and recommendations for better work with Negroes

    Development of turbines for use in oscillating water columns.

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    Bidirectional impulse turbines for oscillating water column wave power devices have the inherent problem of pressure losses associated with the outlet guide vane, adversely affecting the performance of the turbine. Two methods of guide vane design have been investigated with the aim of improving the performance of bidirectional impulse turbines by reducing these losses. These methods employ the use of optimisation, using computational fluid dynamics as a method of predicting the performance of the turbine. Numerical results are presented of the performance of the datum turbine, these have been validated using previous experimental data. These results are used as a baseline to measure performance improvements. An optimisation system has been adapted for the guide vanes of the datum turbine, allowing optimisation in bi-directional flows. Two novel guide vane design concepts were explored and the results of parameterisation studies investigating the effects of specific guide vane parameters are presented. The results of two global optimisation procedures, demonstrating the predicted performance improvements of the optimum guide vane configurations are presented. Both optimisation methods demonstrate reduced losses associated with the OGV of the turbine. The second concept, investigating guide vane profile optimisation in bi-directional flows, resulted in a respectable gain in turbine efficiency

    Screening of Multiple Potential Control Genes for use in Caste and Body Region Comparisons Using RT-qPCR in Coptotermes formosanus

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    Formosan subterranean termites, Coptotermes formosanus, are a significant worldwide pest. Molecular gene expression is an important tool for understanding the physiology of organisms. The recent advancement of molecular tools for Coptotermes formosanus is leading to the advancement of the understanding of termite physiology. One of the first steps in analyzing gene expression is the normalization to constant reference genes. Stable reference genes that have constant expression across multiple treatments are important for accurately comparing target genes' expression. The objective of this investigation was to analyze and validate a set of potential reference genes including 8SrRNA; Glyceraldehyde 3-phosphate dehydrogenase (Gadphd); ribosomal protein L7 (RPL); β-actin (BA1); α-tubulin (Atube); α-actin (Aactin); and elongation factor (Elong) as standards for analysis of transcriptional changes in the termite Coptotermes formosanus, across two phenotypic castes, body regions, and colonies. We also compared the expression of hexamerin-1 and 2 using stable and unstable reference genes to demonstrate the importance of consistent control genes. Our results demonstrate that 18S and RPL can serve as reliable expression standards when comparing these different castes and body regions, and we show that C. formosanus Hex-1 and Hex-2 have expression patterns similar to that previously described in R. flavipes

    Building a Framework of Metadata Change to Support Knowledge Management

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    Article defining ways that metadata records might change (addition, deletion, or modification) and describing a study to evaluate multiple versions of selected records in the UNT Libraries' Digital Collections to observe the types and frequency of various changes

    Orion Portable Fire Extinguisher Performance Testing Against a Laptop Lithium-Ion Battery Stored-Energy Fire-Method, Magnesium Fires, and Combustion By-Product Toxicity

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    As part of the qualification of the International Space Station (ISS) fine water mist portable fire extinguisher (PFE), several test methods were developed to determine firefighting capability against stored-energy sources. The most challenging of these devised stored-energy fire test methods proved to be the Lithium-ion (Li-ion) battery fire test scenario. The Orion crew capsule will utilize a different PFE technology from ISS (water spray rather than water mist), which spurred the need for the same type of evaluation focused on the sources of stored energy slated for use on Orion. Laptops were identified as a realistic source for stored-energy fires, requiring a modified Li-ion battery fire test scenario. In addition to open test cell (ambient oxygen concentration) testing to evaluate new proposed PFE performance, sealed chamber (20.9% and elevated oxygen concentration) testing was also performed. Chamber testing included combustion product sampling at various fire progression points for analysis and application to Orion emergency equipment design and response planning. The PFE stored-energy fire test methodology was modified and testing performed. Initial tests indicated ignition of the laptop magnesium laptop cases was possible. Additional tests were performed to characterize the laptop magnesium case fire behavior in various configurations. The new water spray PFE technology proved effective in extinguishing laptop stored-energy fires, and much was learned in the way these types of fires progressed. Findings indicate potential laptop magnesium case ignition mitigation strategies need to be further investigated

    Evidence Report: Risk of Spaceflight Associated Neuro-ocular Syndrome (SANS)

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    A subset of astronauts develop neuro-ocular structural and functional changes during prolonged periods of spaceflight that may lead to additional neurologic and ocular consequences upon return to Earth

    Atrial Arrhythmias and Their Implications for Space Flight - Introduction

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    This panel will discuss the implications of atrial arrhythmias in astronauts from a variety of perspectives; including historical data, current practices, and future challenges for exploration class missions. The panelists will present case histories, outline the evolution of current NASA medical standards for atrial arrhythmias, discuss the use of predictive tools, and consider potential challenges for current and future missions
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