13,752 research outputs found
Prevalence and Patterns of Injury-Related Mortality in Nevada
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
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
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
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
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
curves.Comment: 9 pages, 12 figures submit to PR
Neutron electromagnetic form factors and inclusive scattering of polarized electrons by polarized He and H targets
The electromagnetic inclusive responses of polarized He and H are
thoroughly investigated at the quasielastic peak for squared momentum transfers
up to , 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 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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