2,113 research outputs found

    Lifetime Measurement of the 6s Level of Rubidium

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    We present a lifetime measurements of the 6s level of rubidium. We use a time-correlated single-photon counting technique on two different samples of rubidium atoms. A vapor cell with variable rubidium density and a sample of atoms confined and cooled in a magneto-optical trap. The 5P_{1/2} level serves as the resonant intermediate step for the two step excitation to the 6s level. We detect the decay of the 6s level through the cascade fluorescence of the 5P_{3/2} level at 780 nm. The two samples have different systematic effects, but we obtain consistent results that averaged give a lifetime of 45.57 +- 0.17 ns.Comment: 10 pages, 9 figure

    Drip Paintings and Fractal Analysis

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    It has been claimed [1-6] that fractal analysis can be applied to unambiguously characterize works of art such as the drip paintings of Jackson Pollock. This academic issue has become of more general interest following the recent discovery of a cache of disputed Pollock paintings. We definitively demonstrate here, by analyzing paintings by Pollock and others, that fractal criteria provide no information about artistic authenticity. This work has also led to two new results in fractal analysis of more general scientific significance. First, the composite of two fractals is not generally scale invariant and exhibits complex multifractal scaling in the small distance asymptotic limit. Second the statistics of box-counting and related staircases provide a new way to characterize geometry and distinguish fractals from Euclidean objects

    Rural Health in Pharmacy Curricula

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    The 2010 Patient Protection and Affordable Care Act proposes strategies to address the workforce shortages of primary care practitioners in rural America. This review addresses the question, “What specialized education and training are colleges and schools of pharmacy providing for graduates who wish to enter pharmacy practice in rural health?” All colleges and schools accredited by the Accreditation Council for Pharmacy Education or those in precandidate status as of December 2011 were included in an Internet-based review of Web sites. A wide scope of curricular offerings were found, ranging from no description of courses or experiences in a rural setting to formally developed programs in rural pharmacy. Although the number of pharmacy colleges and schools providing either elective or required courses in rural health is encouraging, more education and training with this focus are needed to help overcome the unmet need for quality pharmacy care for rural populations

    'Mindless markers of the nation': The routine flagging of nationhood across the visual environment

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    The visual environment has increasingly been used as a lens with which to understand wider processes of social and economic change with studies employing in-depth qualitative approaches to focus on, for example, gentrification or trans-national networks. This exploratory paper offers an alternative perspective by using a novel method, quantitative photo mapping, to examine the extent to which a particular socio-cultural marker, the nation, is ‘flagged’ across three contrasting sites in Britain. As a multi-national state with an increasingly diverse population, Britain offers a particularly fruitful case study, drawing in debates around devolution, European integration and Commonwealth migration. In contributing to wider debates around banal nationalism, the paper notes the extent to which nations are increasingly articulated through commerce, consumption and market exchange and the overall significance of everyday markers (signs, objects, infrastructure) in naturalising a national view of the world

    Matrix geometries and Matrix Models

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    We study a two parameter single trace 3-matrix model with SO(3) global symmetry. The model has two phases, a fuzzy sphere phase and a matrix phase. Configurations in the matrix phase are consistent with fluctuations around a background of commuting matrices whose eigenvalues are confined to the interior of a ball of radius R=2.0. We study the co-existence curve of the model and find evidence that it has two distinct portions one with a discontinuous internal energy yet critical fluctuations of the specific heat but only on the low temperature side of the transition and the other portion has a continuous internal energy with a discontinuous specific heat of finite jump. We study in detail the eigenvalue distributions of different observables.Comment: 20 page

    The Real Combination Problem : Panpsychism, Micro-Subjects, and Emergence

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    Panpsychism harbors an unresolved tension, the seriousness of which has yet to be fully appreciated. I capture this tension as a dilemma, and offer panpsychists advice on how to resolve it. The dilemma, briefly, is as follows. Panpsychists are committed to the perspicuous explanation of macro-mentality in terms of micro-mentality. But panpsychists take the micro-material realm to feature not just mental properties, but also micro-subjects to whom these properties belong. Yet it is impossible to explain the constitution of a macro-subject (like one of us) in terms of the assembly of micro-subjects, for, I show, subjects cannot combine. Therefore the panpsychist explanatory project is derailed by the insistence that the world’s ultimate material constituents (ultimates) are subjects of experience. The panpsychist faces a choice of abandoning her explanatory project, or recanting the claim that the ultimates are subjects. This is the dilemma. I argue that the latter option is to be preferred. This needn’t constitute a wholesale abandonment of panpsychism, however, since panpsychists can maintain that the ultimates possess phenomenal qualities, despite not being subjects of those qualities. This proposal requires us to make sense of phenomenal qualities existing independently of experiencing subjects, a challenge I tackle in the penultimate section. The position eventually reached is a form of neutral monism, so another way to express the overall argument is to say that, keeping true to their philosophical motivations, panpsychists should really be neutral monists.Peer reviewedFinal Accepted Versio

    A new class of semiclassical wave function uniformizations

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    We present a new semiclassical technique which relies on replacing complicated classical manifold structure with simpler manifolds, which are then evaluated by the usual semiclassical rules. Under circumstances where the original manifold structure gives poor or useless results semiclassically the replacement manifolds can yield remarkable accuracy. We give several working examples to illustrate the theory presented here.Comment: 12 pages (incl. 12 figures

    Addressing Rural Health Disparities Through Pharmacy Curricula

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    Approximately 75% of the United States is rural.1 While 20% of the US population lives outside of urban areas, only 9% of physicians and 12% of pharmacists practice in rural areas.2,3 This lack of access to primary care is compounded by the significant need for primary care by citizens in rural areas. More than 1 in 3 adults living in rural America is in poor to fair health, with nearly half having at least 1 major chronic illness.4 Individuals in rural areas have higher rates of smoking as well as obesity, diabetes, and other chronic diseases.5 In its 2005 report on rural health care, the Institute of Medicine asserted that many of the challenges faced by those living in rural areas can be attributed to the lack of access to basic health care services. Furthermore, this report described 5 strategies to address the lack of care in rural areas, and 1 strategy was to increase the supply of primary care health professionals in rural areas through improved education and training.4 Although the report did not specify types of providers, specially trained pharmacists may be able to address the health care disparities found in rural areas

    Unusual Thermodynamics on the Fuzzy 2-Sphere

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    Higher spin Dirac operators on both the continuum sphere(S2S^2) and its fuzzy analog(SF2S^2_F) come paired with anticommuting chirality operators. A consequence of this is seen in the fermion-like spectrum of these operators which is especially true even for the case of integer-spin Dirac operators. Motivated by this feature of the spectrum of a spin 1 Dirac operator on SF2S_F^2, we assume the spin 1 particles obey Fermi-Dirac statistics. This choice is inspite of the lack of a well defined spin-statistics relation on a compact surface such as S2S^2. The specific heats are computed in the cases of the spin 12\frac{1}{2} and spin 1 Dirac operators. Remarkably the specific heat for a system of spin 12\frac{1}{2} particles is more than that of the spin 1 case, though the number of degrees of freedom is more in the case of spin 1 particles. The reason for this is inferred through a study of the spectrums of the Dirac operators in both the cases. The zero modes of the spin 1 Dirac operator is studied as a function of the cut-off angular momentum LL and is found to follow a simple power law. This number is such that the number of states with positive energy for the spin 1 and spin 12\frac{1}{2} system become comparable. Remarks are made about the spectrums of higher spin Dirac operators as well through a study of their zero-modes and the variation of their spectrum with degeneracy. The mean energy as a function of temperature is studied in both the spin 12\frac{1}{2} and spin 1 cases. They are found to deviate from the standard ideal gas law in 2+1 dimensions.Comment: 19 pages, 7 figures. The paper has been significantly modified. Main results are unchange
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