464 research outputs found

    Preface to Symposium on Kentucky Penal Code

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    Kentucky\u27s New Nuisance Statute

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    Election Law and Government Ethics

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    This article surveys developments in Virginia election and government ethics laws for 2014 and 2015, with an emphasis on legislative developments. The focus is on those statutory developments thathave significance or general applicability to the implementation of Virginia\u27s election and ethics laws

    Minimally classifying relative equilibria

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    Estimates on a minimal classification of relative equilibria in the planar n -body problem of celestial mechanics have been announced in [1], [2]. Our main theorem asserts that these estimates are actually met for any n ≧3 on an open set in IR inf+ sup n . For any n ≧4, this open set is proper.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/43205/1/11005_2005_Article_BF01793953.pd

    Rosette Central Configurations, Degenerate central configurations and bifurcations

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    In this paper we find a class of new degenerate central configurations and bifurcations in the Newtonian nn-body problem. In particular we analyze the Rosette central configurations, namely a coplanar configuration where nn particles of mass m1m_1 lie at the vertices of a regular nn-gon, nn particles of mass m2m_2 lie at the vertices of another nn-gon concentric with the first, but rotated of an angle π/n\pi/n, and an additional particle of mass m0m_0 lies at the center of mass of the system. This system admits two mass parameters μ=m0/m1\mu=m_0/m_1 and \ep=m_2/m_1. We show that, as μ\mu varies, if n>3n> 3, there is a degenerate central configuration and a bifurcation for every \ep>0, while if n=3n=3 there is a bifurcations only for some values of ϵ\epsilon.Comment: 16 pages, 6 figure

    Action minimizing orbits in the n-body problem with simple choreography constraint

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    In 1999 Chenciner and Montgomery found a remarkably simple choreographic motion for the planar 3-body problem (see \cite{CM}). In this solution 3 equal masses travel on a eight shaped planar curve; this orbit is obtained minimizing the action integral on the set of simple planar choreographies with some special symmetry constraints. In this work our aim is to study the problem of nn masses moving in \RR^d under an attractive force generated by a potential of the kind 1/rα1/r^\alpha, α>0\alpha >0, with the only constraint to be a simple choreography: if q1(t),...,qn(t)q_1(t),...,q_n(t) are the nn orbits then we impose the existence of x \in H^1_{2 \pi}(\RR,\RR^d) such that q_i(t)=x(t+(i-1) \tau), i=1,...,n, t \in \RR, where τ=2π/n\tau = 2\pi / n. In this setting, we first prove that for every d,n \in \NN and α>0\alpha>0, the lagrangian action attains its absolute minimum on the planar circle. Next we deal with the problem in a rotating frame and we show a reacher phenomenology: indeed while for some values of the angular velocity minimizers are still circles, for others the minima of the action are not anymore rigid motions.Comment: 24 pages; 4 figures; submitted to Nonlinearit

    Health Information Needs of the Pregnant Adolescent

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73151/1/j.1745-7599.1994.tb00906.x.pd

    Does wage rank affect employees' well-being?

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    How do workers make wage comparisons? Both an experimental study and an analysis of 16,000 British employees are reported. Satisfaction and well-being levels are shown to depend on more than simple relative pay. They depend upon the ordinal rank of an individual's wage within a comparison group. “Rank” itself thus seems to matter to human beings. Moreover, consistent with psychological theory, quits in a workplace are correlated with pay distribution skewness

    Relative Equilibria in the Four-Vortex Problem with Two Pairs of Equal Vorticities

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    We examine in detail the relative equilibria in the four-vortex problem where two pairs of vortices have equal strength, that is, \Gamma_1 = \Gamma_2 = 1 and \Gamma_3 = \Gamma_4 = m where m is a nonzero real parameter. One main result is that for m > 0, the convex configurations all contain a line of symmetry, forming a rhombus or an isosceles trapezoid. The rhombus solutions exist for all m but the isosceles trapezoid case exists only when m is positive. In fact, there exist asymmetric convex configurations when m < 0. In contrast to the Newtonian four-body problem with two equal pairs of masses, where the symmetry of all convex central configurations is unproven, the equations in the vortex case are easier to handle, allowing for a complete classification of all solutions. Precise counts on the number and type of solutions (equivalence classes) for different values of m, as well as a description of some of the bifurcations that occur, are provided. Our techniques involve a combination of analysis and modern and computational algebraic geometry

    Culture Shapes Efficiency of Facial Age Judgments

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    Background: Cultural differences in socialization can lead to characteristic differences in how we perceive the world. Consistent with this influence of differential experience, our perception of faces (e.g., preference, recognition ability) is shaped by our previous experience with different groups of individuals. Methodology/Principal Findings: Here, we examined whether cultural differences in social practices influence our perception of faces. Japanese, Chinese, and Asian-Canadian young adults made relative age judgments (i.e., which of these two faces is older?) for East Asian faces. Cross-cultural differences in the emphasis on respect for older individuals was reflected in participants ’ latency in facial age judgments for middle-age adult faces—with the Japanese young adults performing the fastest, followed by the Chinese, then the Asian-Canadians. In addition, consistent with the differential behavioural and linguistic markers used in the Japanese culture when interacting with individuals younger than oneself, only the Japanese young adults showed an advantage in judging the relative age of children’s faces. Conclusions/Significance: Our results show that different sociocultural practices shape our efficiency in processing facia
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