1,277 research outputs found
Medicaid Expenditures and State Budgets: Past, Present, and Future
Rapid spending growth has made Medicaid a major element in state budgets; financial support from Federal matching grants is now a main component of state government revenues and of intergovernmental fiscal relations. We discuss recent, ongoing, and prospective reforms of intergovernmental finances and regulations, including the 1996 welfare reform, the introduction of Medicare Part D, Section 1115 waivers, SCHIP reauthorization, and a shift to block grants. Each would affect the assignment of responsibilities between the state and Federal governments, the viability of which is questionable due to current and future interstate demographic and policy variation, population aging, and Federal fiscal imbalances.
Bloch-type Domain Walls in Rhombohedral BaTiO3
Ferroelectric domain walls (FDWs) are usually considered to be of Ising type,
but there have been suggestions in recent years that Bloch-type FDWs are also
possible in some cases, e.g., in the rhombohedral phase of BaTiO3. The
mechanically compatible and electrically neutral FDWs in rhombohedral BaTiO3
are of 71-degree, 109-degree, and 180-degree type. We have investigated these
FDWs based both on first-principles calculations and on a
Ginzburg-Landau-Devonshire (GLD) model [P. Marton, I. Rychetsky, and J. Hlinka,
Phys. Rev. B 81, 144125 (2010)]. The results from both approaches confirm the
Ising nature of the 71-degree FDW and the Bloch nature of the 180-degree FDW,
and predict both Ising-type and Bloch-type FDWs are possible for the 109-degree
case. Considering the relatively small rhombohedral strain in BaTiO3, the
competition between the energies of Bloch and Ising FDWs can be discussed in
terms of a picture in which a Bloch wall is regarded as being composed of a
pair of smaller-angle Ising ones. A reduction by 40% in the parameters
describing the gradient term in the GLD model brings it into better agreement
with the first-principles results for detailed properties such as the energies
and widths of the FDWs.Comment: 9 pages, 10 figure
Integrating methods for determining length-at-age to improve growth estimates for two large scombrids
Fish growth is commonly estimated from length-at-age data
obtained from otoliths. There are several techniques for estimating length-at-age from otoliths including 1) direct observed counts of annual increments; 2) age adjustment based on a categorization of otolith margins; 3) age adjustment based on known periods of spawning and annuli formation; 4) back-calculation to all annuli, and 5) back-calculation to the last annulus only. In this study we
compared growth estimates (von Bertalanffy growth functions) obtained from the above five methods for estimating length-at-age from otoliths for two large scombrids: narrow-barred Spanish mackerel (Scomberomorus
commerson) and broad-barred king mackerel (Scomberomorus semifasciatus). Likelihood ratio tests revealed that the largest differences in growth occurred between the back-calculation methods and the observed and adjusted methods for both species of mackerel. The pattern, however, was
more pronounced for S. commerson than for S. semifasciatus, because of the pronounced effect of gear selectivity
demonstrated for S. commerson. We propose a method of substituting length-at-age data from observed or adjusted methods with back-calculated length-at-age data to provide
more appropriate estimates of population growth than those obtained with the individual methods alone, particularly when faster growing young fish are disproportionately
selected for. Substitution of observed or adjusted length-at-age data with back-calculated length-at-age data provided more realistic estimates of length for younger ages than observed or adjusted methods as well as more
realistic estimates of mean maximum length than those derived from backcalculation methods alone
Reflective Coating for Lightweight X-Ray Optics
X-ray reflective coating for next generation's lightweight, high resolution, optics for astronomy requires thin-film deposition that is precisely fine-tuned so that it will not distort the thin sub-mm substrates. Film of very low stress is required. Alternatively, mirror distortion can be cancelled by precisely balancing the deformation from multiple films. We will present results on metallic film deposition for the lightweight optics under development. These efforts include: low-stress deposition by magnetron sputtering and atomic layer deposition of the metals, balancing of gross deformation with two-layer depositions of opposite stresses and with depositions on both sides of the thin mirrors
SPIRE Point Source Catalog Explanatory Supplement
The Spectral and Photometric Imaging Receiver (SPIRE) was launched as one of
the scientific instruments on board of the space observatory Herschel. The
SPIRE photometer opened up an entirely new window in the Submillimeter domain
for large scale mapping, that up to then was very difficult to observe. There
are already several catalogs that were produced by individual Herschel science
projects. Yet, we estimate that the objects of only a fraction of these maps
will ever be systematically extracted and published by the science teams that
originally proposed the observations. The SPIRE instrument performed its
standard photometric observations in an optically very stable configuration,
only moving the telescope across the sky, with variations in its configuration
parameters limited to scan speed and sampling rate. This and the scarcity of
features in the data that require special processing steps made this dataset
very attractive for producing an expert reduced catalog of point sources that
is being described in this document. The Catalog was extracted from a total of
6878 unmodified SPIRE scan map observations. The photometry was obtained by a
systematic and homogeneous source extraction procedure, followed by a rigorous
quality check that emphasized reliability over completeness. Having to exclude
regions affected by strong Galactic emission, that pushed the limits of the
four source extraction methods that were used, this catalog is aimed primarily
at the extragalactic community. The result can serve as a pathfinder for ALMA
and other Submillimeter and Far-Infrared facilities. 1,693,718 sources are
included in the final catalog, splitting into 950688, 524734, 218296 objects
for the 250\mu m, 350\mu m, and 500\mu m bands, respectively. The catalog comes
with well characterized environments, reliability, completeness, and
accuracies, that single programs typically cannot provide
Development of a GEM-TPC prototype
The use of GEM foils for the amplification stage of a TPC instead of a con-
ventional MWPC allows one to bypass the necessity of gating, as the backdrift
is suppressed thanks to the asymmetric field configuration. This way, a novel
continuously running TPC, which represents one option for the PANDA central
tracker, can be realized. A medium sized prototype with a diameter of 300 mm
and a length of 600 mm will be tested inside the FOPI spectrometer at GSI using
a carbon or lithium beam at intermediate energies (E = 1-3AGeV). This detector
test under realistic experimental conditions should allow us to verify the
spatial resolution for single tracks and the reconstruction capability for
displaced vertexes. A series of physics measurement implying pion beams is
scheduled with the FOPI spectrometer together with the GEM-TPC as well.Comment: 5 pages, 4 figures, Proceedings for 11th ICATTP conference in como
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The influence of flow and thermal properties on injection pressure and cooling time prediction
Team-based learning in pharmacy: The faculty experience
yesAim
To assess faculty perceptions and experiences when implementing team-based learning (TBL) across a pharmacy curriculum.
Study design
A total of 19 faculty members participated in a series of individual semi-structured interviews that allowed freedom of discussion within a structured framework of inquiry. Data were transcribed, coded using NVivo, and analyzed to establish common themes. Participant quotations were chosen to reinforce the themes and give a voice to the participants.
Findings and discussion
The benefits of TBL were perceived to be enhanced student engagement, peer learning, increased faculty enjoyment of teaching, and student development of transferable skills. Challenges included increased initial workload, writing effective application exercises, and facilitating learner-centered classes. TBL may be useful in optimizing course content to ensure outcomes and activities focus on important concepts. Peer learning appears to benefit student learning. TBL may help equip students with valuable transferable skills. TBL requires an initial upfront investment in faculty development and time to prepare resources. A student-centered approach to learning may be daunting for faculty and require new skill sets.
Conclusions
Faculty described their support for TBL concluding that the pedagogical benefits of engaging students in active learning, the development of transferable skills for the workplace, and the personal satisfaction felt after a TBL class, outweigh the initial challenges of transitioning to TBL
Research productivity and academics’ conceptions of research
This paper asks the question: do people with different levels of research productivity
and identification as a researcher think of research differently? It discusses a
study that differentiated levels of research productivity among English and Australian
academics working in research-intensive environments in three broad discipline areas:
science, engineering and technology; social science and humanities; and medicine and
health sciences. The paper explores the different conceptions of research held by these
academics in terms of their levels of research productivity, their levels of research training,
whether they considered themselves an active researcher and a member of a research team,
and their disciplinary differences
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