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  • 1
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    Island biogeography reveals the deep history of SIV (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-18
    Description: Simian immunodeficiency virus (SIV) lineages have been identified that are endemic to Bioko Island. The time the island formed offers a geological time scale calibration point for dating the most recent common ancestor of SIV. The Bioko viruses cover the whole range of SIV genetic diversity, and each Bioko SIV clade is most closely related to viruses circulating in hosts of the same genus on the African mainland rather than to SIVs of other Bioko species. Our phylogeographic approach establishes that SIV is ancient and at least 32,000 years old. Our conservative calibration point and analyses of gene sequence saturation and dating bias suggest it may be much older.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Worobey, Michael -- Telfer, Paul -- Souquiere, Sandrine -- Hunter, Meredith -- Coleman, Clint A -- Metzger, Michael J -- Reed, Patricia -- Makuwa, Maria -- Hearn, Gail -- Honarvar, Shaya -- Roques, Pierre -- Apetrei, Cristian -- Kazanji, Mirdad -- Marx, Preston A -- 1R01AI27698/AI/NIAID NIH HHS/ -- 1R01AI44596/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 17;329(5998):1487. doi: 10.1126/science.1193550.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Arizona, Tucson, AZ 85721, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20847261" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cercopithecidae/*virology ; Cercopithecus/virology ; Colobus/virology ; Equatorial Guinea ; Evolution, Molecular ; Genes, pol ; Genetic Variation ; Geography ; Mandrillus/virology ; Molecular Sequence Data ; Phylogeny ; Simian Acquired Immunodeficiency Syndrome/*virology ; Simian Immunodeficiency Virus/*classification/*genetics/isolation & purification ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Do High Food Prices Increase Food Insecurity in the United States? (2013)
    Oxford University Press
    Details
    Publication Date: 2013-12-05
    Description: While research establishing the link between high food prices and increased food insecurity in developing countries is robust, similar research about the United States has been lacking. This has been due in part to a lack of suitable price data, but it has also been due to the assumption that prices matter less in the United States, where households spend a relatively small fraction of their income on food. In this article we examine the role that local food prices play in determining food insecurity in the United States by using newly-developed price data. We examine whether low-income households participating in the Supplemental Nutrition Assistance Program (SNAP, formerly Food Stamps) are more likely to be food insecure in areas where food prices are higher. We find that the average effect of food prices on the probability of food insecurity is positive and significant: a one-standard deviation increase in food prices is associated with increases of 2.7, 2.6, and 3.1 percentage points in household, adult, and child food insecurity, respectively. These marginal effects amount to 5.0%, 5.1%, and 12.4% increases in the prevalence of food insecurity for SNAP households, adults, and children, respectively. These results suggest that indexing SNAP benefits to local food prices could improve the ability of the program to reduce food insecurity and economic hardship more generally in areas with high food prices.
    Keywords: H53 - Government Expenditures and Welfare Programs, I31 - General Welfare, I32 - Measurement and Analysis of Poverty
    Print ISSN: 2040-5790
    Electronic ISSN: 2040-5804
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Economics
    Published by Oxford University Press
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  • 3
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    Correcting the beam centroid motion in an induction accelerator and reducing the beam breakup instability (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-09-16
    Description: Author(s): J. E. Coleman, C. A. Ekdahl, D. C. Moir, G. W. Sullivan, and M. T. Crawford Axial beam centroid and beam breakup (BBU) measurements were conducted on an 80 ns FWHM, intense relativistic electron bunch with an injected energy of 3.8 MV and current of 2.9 kA. The intense relativistic electron bunch is accelerated and transported through a nested solenoid and ferrite induction... [Phys. Rev. ST Accel. Beams 17, 092802] Published Mon Sep 15, 2014
    Keywords: Beam Control, Diagnostics, and Feedback
    Electronic ISSN: 1098-4402
    Topics: Physics
    Published by American Physical Society (APS)
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