56 research outputs found

    Engineering and Environmental Aspects of Recycled Materials for Highway Construction

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    DTFH61-93-C-00060This report presents an assessment of environmental aspects and engineering factors related to the utilization of recycled materials in highway construction. A basic overview and assessment of different technologies, processes, and methods for recycling of various material into highway appurtenances and for highway construction are presented with consideration of environmental/health risks

    Estimating loss of Brucella abortus antibodies from age-specific serological data in elk

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    Serological data are one of the primary sources of information for disease monitoring in wildlife. However, the duration of the seropositive status of exposed individuals is almost always unknown for many free-ranging host species. Directly estimating rates of antibody loss typically requires difficult longitudinal sampling of individuals following seroconversion. Instead, we propose a Bayesian statistical approach linking age and serological data to a mechanistic epidemiological model to infer brucellosis infection, the probability of antibody loss, and recovery rates of elk (Cervus canadensis) in the Greater Yellowstone Ecosystem. We found that seroprevalence declined above the age of ten, with no evidence of disease-induced mortality. The probability of antibody loss was estimated to be 0.70 per year after a five-year period of seropositivity and the basic reproduction number for brucellosis to 2.13. Our results suggest that individuals are unlikely to become re-infected because models with this mechanism were unable to reproduce a significant decline in seroprevalence in older individuals. This study highlights the possible implications of antibody loss, which could bias our estimation of critical epidemiological parameters for wildlife disease management based on serological data

    Geochemical processes and the effects of natural organic solutes on the solubility of selenium in coal-mine backfill samples from the Powder River Basin, Wyoming /

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    Shipping list no.: 96-0053-P.Includes bibliographical references (p. 53-55).Mode of access: Internet

    Alliance System and Policy Change

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    Thermal reactions of shale-oil components : methylpyrroles, butylpyrroles, and isopropylpyrroles /

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    Based upon work done in cooperation with the University of Wyoming.Bibliography: p. 37-38.Mode of access: Internet

    [Archaeological survey series]

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    no.1-3.Archaeological survey of eastern Colorado, 1930-32. 1931-33.--no.4.The archaeological survey of Colorado, 1933-34. 1935.--no.5.Archaeological survey of eastern Wyoming, 1931. 1932.--no.6.Archaeological survey of western Nebraska, 1933. 1934.--no.7-- The archaeological survey of the high western plains: no.7 Southern Wyoming and S.W. South Dakota, 1935. 1936. no.8 Pictographs and petroglyphs of the high western plains. 1936. no.9 Northeastern New Mexico, 1929, 1934-35. 1937. no. 10. The Black's Fork culture of southwest Wyoming, 1935-37. 1938. no.11. Petroglyphs of north central New Mexico. 1938. no.12. Further research work in the Black's Fork basin, southwest Wyoming, 1938-39. 1940.Mode of access: Internet
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