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51.
Abstract The following is the Introduction from a published collection of articles edited by Lloyd C. Gardner and Marilyn B. Young, Iraq and the Lessons of Vietnam: Or, How Not to Learn from the Past (New York and London: The New Press, 2007. 322pp. 978-1-59558-149-5). The book's Table of Contents appears on p. 486 below. The specter of Vietnam has been buried forever in the desert sands of the Arabian Peninsula. — George H.W. Bush, 1991 相似文献
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Identification of 2‐(ethylamino)‐1‐(4‐methylphenyl)‐1‐pentanone (4‐MEAP), a New “Legal High” Sold by an Internet Vendor as 4‐Methyl Pentedrone
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Danielle Hamby M.Sc. Annessa Burnett B.S. Michael Jablonsky Ph.D. Brendan Twamley Ph.D. Pierce V. Kavanagh Ph.D. Elizabeth A. Gardner Ph.D. 《Journal of forensic sciences》2015,60(3):721-726
Online vendors are offering a new legal high, 4‐methylpentedrone (4‐MPD). Information for potential users provided by internet vendors of 4‐MPD includes incorrect structures and nonexistent CAS numbers. A sample of 4‐MPD was obtained and analyzed using GC‐MS, NMR, and LC‐EIS. The fragmentation data from the GC‐MS and LC‐EIS produced an M‐1 ion that suggested the molecular mass was 219 amu, rather than 205 amu as calculated for 4‐methylpentedrone. The difference in molecular mass corresponded to the addition of a methyl group. Based on the mass and fragmentation pattern, two standards were synthesized, 2‐(ethylamino)‐1‐(4‐methylphenyl)‐1‐pentanone and 1‐(4‐methylphenyl)‐2‐(propylamino)‐1‐butanone. The synthesis involved bromination of the appropriate ketone followed by the reaction with ethylamine or propylamine. Based on the NMR data and unique fragmentation patterns produced by these molecules, the sample was identified as 2‐(ethylamino)‐1‐(4‐methylphenyl)‐1‐pentanone, not 4‐methylpentedrone. 相似文献
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The international activities of Canadian provincesmainlyAlbert, British Columbia, Ontario, and Québecchallengeconventional concepts of sovereignty and the federal view ofa national monopoly in foreign policy. These provincial activitieshave become more important since the early 1970s and have yieldedoutcomes in the field of foreign policy that would not haveoccurred otherwise. Provinces engage in international activitiesfor a number of reasons. They have the capacity, jurisdictionalobligation, and political desire to do so. Economic necessity,especially the international economic environment, is importantmotivation. Both conflict and cooperation with Ottawa also encourageprovincial involvements in international activities. Occasionally,foreign governments invite such activity as well. Present trendscoupled with the constitutional division of responsibilitiesin Canada suggest that territorial transgovernmentalism willhave greater consequences for Canadian foreign policy, therebygiving to Canada's international presence a character similarto the complexities and contradictions of the country's domesticmosaic. 相似文献
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Roy Gardner 《Public Choice》1983,40(3):237-247
In the paradigm social choice problem, there is a fixed set of alternatives and a fixed set of voters. This essay considers variations of the electorate when some subset of voters has a special voice on some subset of alternatives. We formalized such a situation by means of the veto function. We focus on stable veto functions, exhibit a stable liberal social choice function and promotion mechanism, and investigate a notion of stability for groups whose membership itself is the social state. 相似文献