7,574 research outputs found

    A photographic method for measuring the field of view from within 1978 model automobiles

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    In this study conducted at Pacific University College of Optometry, thirty 1978 model cars are measured with a new bot simple photographic method to determine the field of view from the driver\u27s seat. The horizontal field through the windshield ranged from 78 to 103 degrees,with a mean at 92.2 degrees. Other aspects of the visual design of the autos were studied with the new method and the data presented

    B6: Devonian Granite Melt Transfer in Western Maine: Relations Between Deformation, Metamorphism, Melting and Pluton Emplacement at the Migmatite Front

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    Guidebook for field trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, p. 217-246

    Effect of Passive Integrated Transponder Tag Implantation Site on Tag Retention, Growth, and Survival of Two Sizes of Juvenile Bluegills and Yellow Perch

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    Passive integrated transponder (PIT) tags are commonly used to monitor growth, habitat use, activity rates, and survival of individual fish. However, for successful completion of research objectives, the tags must be retained and must not affect fish growth or survival. We compared the effects of PIT tagging location on tag retention, growth, and survival of juvenile bluegills Lepomis macrochirus and yellowperch Perca flavescens. In total, 80 bluegills and 80 yellow perch from two size-classes (75–101 and 128–162 mm total length) were randomly assigned to a control or to one of three tagging location treatments: isthmus, body cavity, or dorsal musculature. Fish received daily ad libitum rations and were monitored for survival. On days 14, 28, and 42, the fish were measured, weighed, and checked for tag retention. Use of the isthmus as a tagging location resulted in lower tag retention for both species and both size-classes relative to the body cavity and dorsal musculature locations. Tagging location had no detectable effect on growth or survival responses for either species or either size-class. Thus, PIT tags that are implanted in the dorsal musculature of large juvenile bluegills and yellow perch and in the body cavity of small juvenile bluegills and yellow perch can have high retention with minimal adverse effects

    The Social Architecture of Local Food Tourism: Challenges and Opportunities for Community Economic Development

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    Local food tourism—culinary tourism with an explicit emphasis on local food systems—is emerging as a “green” model for community economic development. However, do local food tourism networks constitute a net gain to community economies in all contexts? This article explores that question through surveys and interviews with farmers, restaurateurs, and food tourists in three Wisconsin counties. Framing our discussion using the community capitals framework, we argue that economic benefits do accrue to communities from participation in these networks, but the net gains are ambiguous. Specifically, involvement in local food tourism networks increases stocks of social and human capital, deepens marketing opportunities for participating enterprises, and confers a price premium for food marketed as local. However, there can be significant transaction costs associated with participation, certain types of natural and cultural capital must prefigure successful execution, and restaurateurs levy significant power over farmers within the local food network. These tradeoffs demonstrate that growth in particular community capitals may not always be unequivocally good for communities

    Ultraviolet Observations of Super-Chandrasekhar Mass Type Ia Supernova Candidates with Swift UVOT

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    Among Type Ia supernovae (SNe~Ia) exist a class of overluminous objects whose ejecta mass is inferred to be larger than the canonical Chandrasekhar mass. We present and discuss the UV/optical photometric light curves, colors, absolute magnitudes, and spectra of three candidate Super-Chandrasekhar mass SNe--2009dc, 2011aa, and 2012dn--observed with the Swift Ultraviolet/Optical Telescope. The light curves are at the broad end for SNe Ia, with the light curves of SN~2011aa being amongst the broadest ever observed. We find all three to have very blue colors which may provide a means of excluding these overluminous SNe from cosmological analysis, though there is some overlap with the bluest of "normal" SNe Ia. All three are overluminous in their UV absolute magnitudes compared to normal and broad SNe Ia, but SNe 2011aa and 2012dn are not optically overluminous compared to normal SNe Ia. The integrated luminosity curves of SNe 2011aa and 2012dn in the UVOT range (1600-6000 Angstroms) are only half as bright as SN~2009dc, implying a smaller 56Ni yield. While not enough to strongly affect the bolometric flux, the early time mid-UV flux makes a significant contribution at early times. The strong spectral features in the mid-UV spectra of SNe 2009dc and 2012dn suggest a higher temperature and lower opacity to be the cause of the UV excess rather than a hot, smooth blackbody from shock interaction. Further work is needed to determine the ejecta and 56Ni masses of SNe 2011aa and 2012dn and fully explain their high UV luminosities.Comment: 12 pages, 8 figures Accepted for publication in the Astrophysical Journal Data available on the Swift supernova website http://swift.gsfc.nasa.gov/docs/swift/sne/swift_sn.htm
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