2,496 research outputs found

    Mosquitoes as Vectors of Disease in Minnesota

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    Diseases due to mosquito-borne viruses occur every summer in Minnesota. The incidence of Western encephalitis and LaCrosse encephalitis is usually low, but outbreaks of Western encephalitis have occurred in the past. Evidence of Jamestown Canyon virus activity has been found in Minnesota. This virus may represent a newly-recognized cause of central nervous system disease and encephalitis. The epidemiology of the mosquito-borne encephalitis viruses found in Minnesota and the methods of disease surveillance and control are discussed

    1965, June 12 - W. Wyan Washburn

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    Series 1.1.2 - Fay Webb Gardner; Personal Papers; Correspondence Correspondence from W. Wyan Washburn.https://digitalcommons.gardner-webb.edu/fay-webb-gardner-correspondence/1021/thumbnail.jp

    Wildlife in Airport Environments: Chapter 10 Managing Turfgrass to Reduce Wildlife Hazards at Airports

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    Multiple factors-including safety regulations, economic considerations, location, and attractiveness to wildlife recognized as hazardous to aviation- influence the choice of land cover at airports. The principal land covet at airports within North America has historically been turfgrass, usually coolseason perennial grass species native to Europe. However, recent research has determined that, from a wildlife perspective, not all turf grasses are alike. Some grasses are more palatable to herbivorous hazardous wildlife (e.g., Canada geese [Branta canadensis]) than others, and thus are more likely to increase the potential for wildlife-aircraft collisions when planted near critical airport operating areas. How turfgrasses are managed (e.g., by mowing or herbicide use) can also influence the degree of use by wildlife. In this chapter we (1) review the role of vegetation in the airport environment, (2) review traditional and current methods of vegetation management on airfields, (3) discuss selection criteria for plant materials in reseeding efforts, and (4) provide recommendations for future research

    Vitamin A potency of market milk

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    Letter from Catherine W. Chapman to Governor Washburn regarding state aid, November 10, 1861

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    https://digitalmaine.com/adj_gen_corr_town_acton/1002/thumbnail.jp

    A study of high-altitude manned research aircraft employing strut-braced wings of high-aspect-ratio

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    The effect of increased wing aspect ratio of subsonic aircraft on configurations with and without strut bracing. Results indicate that an optimum cantilever configuration, with a wing aspect ratio of approximately 26, has a 19% improvement in cruise range when compared to a baseline concept with a wing aspect ratio of approximately 10. An optimum strut braced configuration, with a wing aspect ratio of approximately 28, has a 31% improvment in cruise range when compared to the same baseline concept. This improvement is mainly due to the estimated reduction in wing weight resulting from use of lifting struts. All configurations assume the same mission payload and fuel. The drag characteristics of the wings are enhanced with the use of laminar flow airfoils. A method for determining the extent of attainable natural laminar flow, and methods for preliminary structural design and for aerodynamic analysis of wings lifting struts are presented
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