13,752 research outputs found

    Prevalence and Patterns of Injury-Related Mortality in Nevada

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    Too many lives are lost to injury in the United States and in Nevada. Nearly 200,000 people in our country die each year from injuries, which is equivalent to one death every three minutes (CDC 2017b). Each of these deaths not only extinguishes a life, but also affects the friends, family, and community of the deceased. And deaths from injury are costly: researchers estimate that costs from fatal injuries exceed $200 billion (CDC 2017b). Injury refers to damage to the body from some external force, such as from a car crash or a fall, including kinetic, chemical, electrical, thermal or other forces. There are multiple types of death from injury. Health researchers and policymakers classify injuries as unintentional or intentional, and if intentional, injury deaths are further classified as either suicide or homicide. Researchers and policymakers further categorize injuries by the mechanism or circumstances of the injury (such as motor vehicle crash, poisoning, or firearm)

    Trichobezoar in a 13 year old Male: a case report and review of literature

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    Case report of a trichobezoar occuring in the stomach of a 13 year old boy known to suffer from trichotillomania. 90% of trichobezoars occur in adolescent females and the occurrence in males is rarely documented. The clinical presentation and complications of trichobezoars are discussed. Differential diagnosis of epigastric masses in children and the investigations utilised to diagnose these intragastric hairballs together with possible hypothses on their pathogenesis are discussed.peer-reviewe

    Nuclear response functions with finite range Gogny force: tensor terms and instabilities

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    A fully-antisymmetrized random phase approximation calculation employing the continued fraction technique is performed to study nuclear matter response functions with the finite range Gogny force. The most commonly used parameter sets of this force, as well as some recent generalizations that include the tensor terms are considered and the corresponding response functions are shown. The calculations are performed at the first and second order in the continued fraction expansion and the explicit expressions for the second order tensor contributions are given. Comparison between first and second order continued fraction expansion results are provided. The differences between the responses obtained at the two orders turn to be more pronounced for the forces including tensor terms than for the standard Gogny ones. In the vector channels the responses calculated with Gogny forces including tensor terms are characterized by a large heterogeneity, reflecting the different choices for the tensor part of the interaction. For sake of comparison the response functions obtained considering a G-matrix based nuclear interaction are also shown. As first application of the present calculation, the possible existence of spurious finite-size instabilities of the Gogny forces with or without tensor terms has been investigated. The positive conclusion is that all the Gogny forces, but the GT2 one, are free of spurious finite-size instabilities. In perspective, the tool developed in the present paper can be inserted in the fitting procedure to construct new Gogny-type forces

    Harmonics of the AC susceptibility as probes to differentiate the various creep models

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    We measured the temperature dependence of the 1st and the 3rd harmonics of the AC magnetic susceptibility on some type II superconducting samples at different AC field amplitudes, hAC. In order to interpret the measurements, we computed the harmonics of the AC susceptibility as function of the temperature T, by integrating the non-linear diffusion equation for the magnetic field with different creep models, namely the vortex glass-collective creep (single-vortex, small bundle and large bundle) and Kim-Anderson model. We also computed them by using a non-linear phenomenological I-V characteristics, including a power law dependence of the pinning potential on hAC. Our experimental results were compared with the numerically computed ones, by the analysis of the Cole-Cole plots. This method results more sensitive than the separate component analysis, giving the possibility to obtain detailed information about the contribution of the flux dynamic regimes in the magnetic response of the analysed samples.Comment: 9 pages, 6 figures, submitted to Physica

    Magnetic relaxation of type II superconductors in a mixed state of entrapped and shielded flux

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    The magnetic relaxation has been investigated in type II superconductors when the initial magnetic state is realized with entrapped and shielded flux (ESF) contemporarily. This flux state is produced by an inversion in the magnetic field ramp rate due to for example a magnetic field overshoot. The investigation has been faced both numerically and by measuring the magnetic relaxation in BSCCO tapes. Numerical computations have been performed in the case of an infinite thick strip and of an infinite slab, showing a quickly relaxing magnetization in the first seconds. As verified experimentally, the effects of the overshoot cannot be neglected simply by cutting the first 10-100 seconds in the magnetic relaxation. On the other hand, at very long times, the magnetic states relax toward those corresponding to field profiles with only shielded flux or only entrapped flux, depending on the amplitude of the field change with respect to the full penetration field of the considered superconducting samples. In addition, we have performed numerical simulations in order to reproduce the relaxation curves measured on the BSCCO(2223) tapes; this allowed us to interpret correctly also the first seconds of the M(t)M(t) curves.Comment: 9 pages, 12 figures submit to PR

    Neutron electromagnetic form factors and inclusive scattering of polarized electrons by polarized 3^{3}He and 3^{3}H targets

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    The electromagnetic inclusive responses of polarized 3^{3}He and 3^{3}H are thoroughly investigated at the quasielastic peak for squared momentum transfers up to 2(GeV/c)22 (GeV/c)^2, within the plane wave impulse approximation. Great emphasys is put on the effects in the bound-state due to different two- and three-body nuclear forces, and to the Coulomb interaction as well. A careful analysis of the polarized responses allows to select possible experiments for minimizing the model dependence in the extraction of the neutron electromagnetic form factors. In particular, the relevant role played by the proton in the transverse-longitudinal response of polarized 3^{3}He, at low momentum transfer, can be utilized for obtaining valuable information on the proton contribution to the total polarized response and eventually on the neutron charge form factor.Comment: 27 pages, Latex, 9 Postscript figures. To appear in Phys. Rev. C (July '97
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