88,850 research outputs found

    Terricolous Spiders (Araneae) of Insecticide-Treated Spruce-Fir Forests in West-Central Maine

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    Spiders of 12 families, 42 genera, and at least 62 species were captured in linear-pitfall traps placed in insecticide-treated (Sevin-4-Oil®, Dipel 4L ®, Thuricide 16B®) and untreated spruce-fIr forests of west-central Maine. Species richness per family ranged from 1 (Theridiidae, Araneidae, Salticidae) to 19 (Erigonidae). Most trapped species were web-spinners (67.2%); most trapped individuals were hunters (75.2%). Lycosidae accounted for 66.1 % of all (n = 887) captured spiders. Total trapped spiders varied among insecticide treatments, sampling dates, and study sites. However, comparison of mean prespray and postspray trap catches indicated no significant reduction (ANOVA, ANCOVA, P 0.05) in terricolous spiders following insecticide treatments. Increases in spider abundance during postspray sampling periods may have masked detection of treatment effects

    Proton Decay and the Planck Scale

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    Even without grand unification, proton decay can be a powerful probe of physics at the highest energy scales. Supersymmetric theories with conserved R-parity contain Planck-suppressed dimension 5 operators that give important contributions to nucleon decay. These operators are likely controlled by flavor physics, which means current and near future proton decay experiments might yield clues about the fermion mass spectrum. I present a thorough analysis of nucleon partial lifetimes in supersymmetric one-flavon Froggatt-Nielsen models with a single U(1)_X family symmetry which is responsible for the fermionic mass spectrum as well as forbidding R-parity violating interactions. Many of the models naturally lead to nucleon decay near present limits without any reference to grand unification.Comment: 6 pages, 3 figures, talk given at PASCOS '04, to appear in the proceeding

    A Cubical Flat Torus Theorem and the Bounded Packing Property

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    We prove the bounded packing property for any abelian subgroup of a group acting properly and cocompactly on a CAT(0) cube complex. A main ingredient of the proof is a cubical flat torus theorem. This ingredient is also used to show that central HNN extensions of maximal free-abelian subgroups of compact special groups are virtually special, and to produce various examples of groups that are not cocompactly cubulated.Comment: 14 pages, 2 figures, submitted May 2015 Minor corrections and swapped sections 2 and 3 Corrected an unfortunate typo in Theorem 2.1 - the hypothesis that the cube complex be finite dimensional has now been adde

    Design, Financial Trends and On-Field Success

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    Since college athletic departments are considered non-profit organizations and it’s expected they spend revenue in support of their overall mission which can be considered as achieving on-field success. Previous literature has uncovered multiple relationships between expenditures and revenue in comparison to on-field success. The common theory is that athletic programs must increase spending to increase wins, and increase wins to increase revenue. The purpose of our research is to explore financial trends within the rank based competition structure of NCAA Division I college football’s top 25 football teams in the 2012-2015 seasons. We will also acknowledge the effects of the transition from the former Bowl Championship Series (BCS) post season structure in 2012 and 2013 in comparison to the 2014 and 2015 seasons under the playoff structure that allows the top four teams to compete for the spotlight in an additional national championship bowl game. Results from our study indicate that total expenditures are the strongest indicator of on-field success, or the final rank of an institution and supports findings in our literature that explores the financial trends within the highest level of competition within Division I College football\u27s rank based design

    Against Molinism: A Refutation of William Lane Craig\u27s Molinism

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    The debate concerning human free will, human moral culpability, and God’s sovereignty has raged for millennia within the Christian church. The recent rediscovery of the medieval philosophical theory known as Molinism brought Molinism to the fore of this debate. One major contemporary proponent of Molinism is William Lane Craig, the famous philosopher, theologian, and apologist. The purpose of this essay is to present a refutation of Craig\u27s brand of Molinism by arguing that Craig’s Molinism relies on a flawed view of human freedom and further fails to reconcile this flawed view of human freedom with God’s sovereignty
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