2,059 research outputs found
Are U.S. Congregations Patching the Social Safety Net? Trends from 1998 to 2012
As social services become increasingly privatized amid a federal policy environment that provides a means-tested, temporary social safety net, there is potential for a larger contribution by congregations as social service providers. Using data from a nationally representative sample of religious congregations collected in 1998, 2006, and 2012, we examine whether congregations have increased service activity over time, and whether provision varies by the congregation’s community-level context. We find that post-Great Recession, congregations are more likely to engage in broad social services and in “core” services that address basic economic needs. Congregations in high-poverty neighborhoods were less likely to provide services in 1998 than congregations in low-poverty neighborhoods; after the recession, not only are significantly more congregations in high-poverty neighborhoods providing services than in 1998, they have closed the gap with congregations in low-poverty neighborhoods and are equally likely to be providing any services regardless of neighborhood poverty. Our findings highlight the importance of service measurement to determine the prevalence of congregation-level service provision and suggest that congregational service provision may be a substantial yet inadequate substitute for the public safety net
Finding Efficient Collective Variables: The Case of Crystallization
Several enhanced sampling methods such as umbrella sampling or metadynamics
rely on the identification of an appropriate set of collective variables.
Recently two methods have been proposed to alleviate the task of determining
efficient collective variables. One is based on linear discriminant analysis,
the other on a variational approach to conformational dynamics, and uses
time-lagged independent component analysis. In this paper, we compare the
performance of these two approaches in the study of the homogeneous
crystallization of two simple metals. We focus on Na and Al and search for the
most efficient collective variables that can be expressed as a linear
combination of X-ray diffraction peak intensities. We find that the
performances of the two methods are very similar. However, the method based on
linear discriminant analysis, in its harmonic version, is to be preferred
because it is simpler and much less computationally demanding
Visual Form of Alzheimer\u27s Disease and its Response to Anticholinesterase Therapy
In a 60-Year-Old Woman with the Visual Variant of Alzheimer\u27s Disease, Single Photon Emission Computed Tomography Abnormalities Were Most Marked in the Parieto-Occipital Regions of the Brain. after Treatment with Donepezil, Improvement is Noted on Neuropsychological Testing and on Brain SPECT, Including Increased Perfusion (Metabolism) in the Occipital Lobes
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Columbia River Hatchery Reform System-Wide Report.
The US Congress funded the Puget Sound and Coastal Washington Hatchery Reform Project via annual appropriations to the US Fish and Wildlife Service (USFWS) beginning in fiscal year 2000. Congress established the project because it recognized that while hatcheries have a necessary role to play in meeting harvest and conservation goals for Pacific Northwest salmonids, the hatchery system was in need of comprehensive reform. Most hatcheries were producing fish for harvest primarily to mitigate for past habitat loss (rather than for conservation of at-risk populations) and were not taking into account the effects of their programs on naturally spawning populations. With numerous species listed as threatened or endangered under the Endangered Species Act (ESA), conservation of salmon in the Puget Sound area was a high priority. Genetic resources in the region were at risk and many hatchery programs as currently operated were contributing to those risks. Central to the project was the creation of a nine-member independent scientific review panel called the Hatchery Scientific Review Group (HSRG). The HSRG was charged by Congress with reviewing all state, tribal and federal hatchery programs in Puget Sound and Coastal Washington as part of a comprehensive hatchery reform effort to: conserve indigenous salmonid genetic resources; assist with the recovery of naturally spawning salmonid populations; provide sustainable fisheries; and improve the quality and cost-effectiveness of hatchery programs. The HSRG worked closely with the state, tribal and federal managers of the hatchery system, with facilitation provided by the non-profit organization Long Live the Kings and the law firm Gordon, Thomas, Honeywell, to successfully complete reviews of over 200 hatchery programs at more than 100 hatcheries across western Washington. That phase of the project culminated in 2004 with the publication of reports containing the HSRG's principles for hatchery reform and recommendations for Puget Sound/Coastal Washington hatchery programs, followed by the development in 2005 of a suite of analytical tools to support application of the principles (all reports and tools are available at www.hatcheryreform.us). In 2005, Congress directed the National Oceanic and Atmospheric Administration-Fisheries (NOAA Fisheries) to replicate the Puget Sound and Coastal Washington Hatchery Reform Project in the Columbia River Basin. The HSRG was expanded to 14 members to include individuals with specific knowledge about the Columbia River salmon and steelhead populations. This second phase was initially envisioned as a one-year review, with emphasis on the Lower Columbia River hatchery programs. It became clear however, that the Columbia River Basin needed to be viewed as an inter-connected ecosystem in order for the review to be useful. The project scope was subsequently expanded to include the entire Basin, with funding for a second year provided by the Bonneville Power Administration (BPA) under the auspices of the Northwest Power and Conservation Council's (NPCC) Fish and Wildlife Program. The objective of the HSRG's Columbia River Basin review was to change the focus of the Columbia River hatchery system. In the past, these hatchery programs have been aimed at supplying adequate numbers of fish for harvest as mitigation primarily for hydropower development in the Basin. A new, ecosystem-based approach is founded on the idea that harvest goals are sustainable only if they are compatible with conservation goals. The challenge before the HSRG was to determine whether or not conservation and harvest goals could be met by fishery managers and, if so, how. The HSRG determined that in order to address these twin goals, both hatchery and harvest reforms are necessary. The HSRG approach represents an important change of direction in managing hatcheries in the region. It provides a clear demonstration that current hatchery programs can indeed be redirected to better meet both conservation and harvest goals. For each Columbia River Basin Environmentally Significant Unit (ESU), Distinct Population Segment (MPG) or Major Population Group (MPG) reviewed, the HSRG presents its findings and recommendations in the form of an HSRG solution. This package of recommended changes to current hatchery and harvest program design and operation is intended to demonstrate how the programs could be managed to significantly increase the likelihood of meeting the managers goals for both harvest and conservation of the ESU/DPS/MPG. The 'HSRG solution' also highlights the biological principles that the HSRG believes must form the foundation for successful use of hatcheries and fisheries as management tools
Voltage-independent SK-channel dysfunction causes neuronal hyperexcitability in the hippocampus of Fmr1 knock-out mice
Neuronal hyperexcitability is one of the major characteristics of fragile X syndrome (FXS), yet the molecular mechanisms of this critical dysfunction remain poorly understood. Here we report a major role of voltage-independent potassium (
Testate amoebae as palaeohydrological proxies in Sürmene Aǧaçbaşi Yaylasi Peatland (Northeast Turkey)
Testate amoebae as palaeohydrological proxies in sürmene ağaçbaşi yaylasi peatland (northeast Turkey) Testate amoebae are unicellular micro-organisms whose hydrological sensitivity and good preservation in peats make them valuable proxies for past peatland surface wetness, and therefore climate. Previous testate amoebae transfer functions have been spatially restricted with no studies from Asia. To derive a transfer function, a sequence of samples was extracted from an ombrotrophic peatland in Turkey and amoebae counted. The internal structure of the data was explored using principal components analysis and relationships with the environmental data tested by redundancy analyses. Transfer function models were developed using a variety of techniques. As in other regions, depth to water table is the most important control on amoebae community composition. Transfer function performance was initially poor, primarily due to the inclusion of samples from areas of the site that had been heavily affected by peat cutting and had distinctly different amoebae communities. Model performance is improved by selective sample exclusion, reducing jack-knifed root mean square error of prediction to 7.1 cm. The model was tested using an initial palaeoecological data-set. Overlap with the training set was limited, although a hydrological reconstruction using this model produces similar results to a transfer function derived from northern European peatlands. This study provides the first testate amoebae transfer function from Asia and demonstrates that hydrological preferences of many of the key taxa are consistent across a large area of the Northern Hemisphere. The transfer function will allow detailed palaeoclimate reconstruction from this peatland, adding to our knowledge of Holocene climatic change in southwest Asia
Isolated Wetlands - The Groundwater Connection
2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Managemen
Periodic optical variability and debris accretion in white dwarfs: a test for a causal connection
Recent Kepler photometry has revealed that about half of white dwarfs (WDs)
have periodic, low-level (~ 1e-4 - 1e-3), optical variations. Hubble Space
Telescope (HST) ultraviolet spectroscopy has shown that up to about one half of
WDs are actively accreting rocky planetary debris, as evidenced by the presence
of photospheric metal absorption lines. We have obtained HST ultraviolet
spectra of seven WDs that have been monitored for periodic variations, to test
the hypothesis that these two phenomena are causally connected, i.e. that the
optical periodic modulation is caused by WD rotation coupled with an
inhomogeneous surface distribution of accreted metals. We detect photospheric
metals in four out of the seven WDs. However, we find no significant
correspondence between the existence of optical periodic variability and the
detection of photospheric ultraviolet absorption lines. Thus the null
hypothesis stands, that the two phenomena are not directly related. Some other
source of WD surface inhomogeneity, perhaps related to magnetic field strength,
combined with the WD rotation, or alternatively effects due to close binary
companions, may be behind the observed optical modulation. We report the
marginal detection of molecular hydrogen in WD J1949+4734, only the fourth
known WD with detected H_2 lines. We also re-classify J1926+4219 as a
carbon-rich He-sdO subdwarf.Comment: MNRAS, in pres
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