8,400 research outputs found
Galerkin Trial Spaces and Davison-Maki Methods for the Numerical Solution of Differential Riccati Equations
Possible impact of CAP reform on Florida's citrus pulp industry
Agribusiness, Agricultural and Food Policy, International Relations/Trade,
An Overview of the Rotational Behavior of Metal--Poor Stars
The present paper describes the behavior of the rotational velocity in
metal--poor stars ([Fe/H]<-0.5 dex) in different evolutionary stages, based on
Vsini values from the literature. Our sample is comprised of stars in the field
and some Galactic globular clusters, including stars on the main sequence, the
red giant branch (RGB), and the horizontal branch (HB). The metal--poor stars
are, mainly, slow rotators, and their Vsini distribution along the HR diagram
is quite homogeneous. Nevertheless, a few moderate to high values of Vsini are
found in stars located on the main sequence and on the HB. We show that the
overall distribution of Vsini values is basically independent of metallicity
for the stars in our sample. In particular, the fast-rotating main sequence
stars in our sample present similar rotation rates as their metal-rich
counterparts, suggesting that some of them may actually be fairly young, in
spite of their low metallicity, or else that at least some of them would be
better classified as blue straggler stars. We do not find significant evidence
of evolution in Vsini values as a function of position on the RGB; in
particular, we do not confirm previous suggestions that stars close to the RGB
tip rotate faster than their less evolved counterparts. While the presence of
fast rotators among moderately cool blue HB stars has been suggested to be due
to angular momentum transport from a stellar core that has retained significant
angular momentum during its prior evolution, we find that any such transport
mechanisms must likely operate very fast as the star arrives on the zero-age HB
(ZAHB), since we do not find a link between evolution off the ZAHB and Vsini
values.
We present an extensive tabulation of all quantities discussed in this paper,
including rotation velocities, temperatures, gravitieComment: 22 pages, 10 figure
Evaluation of Impact of End-Of-Life Nursing Education Consortium (Elnec) Education On Registered Nurses
Seniors make up the fastest growing population in the United States. This population, with their multiple, chronic, progressive, ultimately terminal health conditions, is driving an urgent need to embed the knowledge and skills required to provide high-quality end-of-life (EOL) or palliative care within the education for nurses (Kelley & Meier, 2010). Although nurses routinely provide most of the care to patients at or near their EOL, studies report they feel unprepared for the challenge (Barrere, & Durkin, 2013). Regulatory and accrediting bodies have designated competencies for palliative care in the undergraduate nursing curriculum (Grant, 2013). Studies suggest that the EOL care receives even less attention in continuing education course work (Gillan, van der Riet, & Jeong, 2014). The recognition of the need for a skilled cadre of nurses committed to providing high-quality care for dying individuals and their families has led to adoption of the End Of Life Education Consortium (ELNEC) course for a volunteer group of nurses at a three hospital acute care system in an urban metropolitan area. ELNEC is international, evidence based, comprehensive program that utilizes mixed educational modalities (Grant et al., 2013). This study validated the findings of earlier work that administration of and ELNEC one day course demonstrated a statistically significant improvement in a volunteer sample of 29 nurses\u27 knowledge of palliative care. A limitation of this project is that it does not address nurses\u27 practice change resulting from knowledge acquisition. The greatest implication of this study is that with administrative support, the course would be expanded through the health care system, and promoted at the state wide level in order to acquire a critical mass of nurses able to practice excellent palliative care nursing
Prescription Drug Control Under the Federal Controlled Substances Act: A Web of Administrative, Civil, and Criminal Law Controls
This system of control seeks to limit the abuse of prescription medication in three ways through administrative, civil, and criminal restraints. First, it limits the quantity of prescription drugs that are produced each year. Annual quotas are established for the manufacture of controlled substances in Schedules I and II. Second, the system defines those situations in which such drugs can be legally prescribed or administered to persons in need. Third, the system attempts to deter individuals from obtaining such drugs from legitimate sources for other than legitimate needs
WDX-Analysis of the New Superconductors RO(1-x)F(x)FeAs and Its Consequences on the Electronic Phase Diagram
Polycrystalline samples of RO1-xFxFeAs (0 < x < 0.25) (R = La, Sm, Gd) were
investigated by wavelength-dispersive X-ray spectroscopy (WDX) in the electron
microscope to determine the composition of the samples, in particular the
fluorine content. It was found that the measured fluorine content can deviate
considerably from the initial weight. In the lanthanum compound LaO1-xFxFeAs,
we found good agreement mainly for x > 0.05, but for x < 0.05 the fluorine
hardly goes into the sample. For the samarium compound we measured less than
half the fluorine in the sample as initially weighed at all fluorine
concentrations. These measured values are taken into account when drawing the
electronic phase diagrams of LaO1-xFxFeAs and SmO1-xFxFeAs. This leads to a
more consistent picture of both of the diagrams in comparison to the plot of
the initial weight.Comment: 5 pages, 4 figures, Accepted for publication in Journal of
Superconductivity and Novel Magnetis
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A Comparison of Interpolation Methods for Sparse Data: Application to Wind and Concentration Fields
In order to produce gridded fields of pollutant concentration data and surface wind data for use in an air quality model, a number of techniques for interpolating sparse data values are compared. The techniques are compared using three data sets. One is an idealized concentration distribution to which the exact solution is known, the second is a potential flow field, while the third consists of surface ozone concentrations measured in the Los Angeles Basin on a particular day. The results of the study indicate that fitting a second-degree polynomial to each subregion (triangle) in the plane with each data point weighted according to its distance from the subregion provides a good compromise between accuracy and computational cost
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