3,274 research outputs found
DETERMINANTS OF THE HEALTH OF AMERICAN PRESCHOOL CHILDREN: ESTIMATED HEALTH DEMAND AND PRODUCTION FUNCTIONS
Health Economics and Policy,
ESTIMATING THE EFFECT OF THE SPECIAL SUPPLEMENTAL NUTRITION PROGRAM FOR WOMEN, INFANTS AND CHILDREN (WIC) ON CHILDREN'S HEALTH
Data from NHANES are used to analyze the effect of the WIC program on the health of U.S. preschool children's health. A household health production model shows that WIC does improve the health of children, along with a higher poverty income ratio. Region of the country or county is also significant.Food Consumption/Nutrition/Food Safety, Health Economics and Policy,
Resonance Region Structure Functions and Parity Violating Deep Inelastic Scattering
The primary motive of parity violating deep inelastic scattering experiments
has been to test the standard model, particularly the axial couplings to the
quarks, in the scaling region. The measurements can also test for the validity
of models for the off-diagonal structure functions in the resonance region. The off-diagonal structure functions are
important for the accurate calculation of the -box correction to the
weak charge of the proton. Currently, with no data to determine
directly, models are constructed by modifying
existing fits to electromagnetic data. We present the asymmetry value for
deuteron and proton target predicted by several different models, and demonstrate that there are notable disagreements.Comment: 6 pages, 3 figures. New version contains additional descriptions of
competing structure function model
New Physics and the Proton Radius Problem
Background: The recent disagreement between the proton charge radius
extracted from Lamb shift measurements of muonic and electronic hydrogen
invites speculation that new physics may be to blame. Several proposals have
been made for new particles that account for both the Lamb shift and the muon
anomalous moment discrepancies. Purpose: We explore the possibility that new
particles' couplings to the muon can be fine-tuned to account for all
experimental constraints. Method: We consider two fine-tuned models, the first
involving new particles with scalar and pseudoscalar couplings, and the second
involving new particles with vector and axial couplings. The couplings are
constrained by the Lamb shift and muon magnetic moments measurements while mass
constraints are obtained by kaon decay rate data. Results: For the
scalar-pseudoscalar model, masses between 100 to 200 MeV are not allowed. For
the vector model, masses below about 200 MeV are not allowed. The strength of
the couplings for both models approach that of electrodynamics for particle
masses of about 2 GeV. Conclusions: New physics with fine tuned couplings may
be entertained as a possible explanation for the Lamb shift discrepancy.Comment: 6 pages, 6 figures, v2 contains revised comment on competing model of
Lamb Shift discrepanc
M2 growth in 1995: a return to normalcy?
A discussion of M2's demise as a reliable indicator of financial conditions in the economy, and a look at recent evidence suggesting that even though the aggregate has been behaving more normally over the past year or so, it is unlikely to regain its status as a key policy guide any time soon.Economic indicators ; Money supply
Gamma-Z box contributions to parity violating elastic e-p scattering
Parity-violating (PV) elastic electron-proton scattering measures Q-weak for
the proton, . To extract from data, all radiative corrections
must be well-known. Recently, disagreement on the gamma-Z box contribution to
has prompted the need for further analysis of this term. Here, we
support one choice of a debated factor, go beyond the previously assumed
equality of electromagnetic and gamma-Z structure functions, and find an
analytic result for one of the gamma-Z box integrals. Our numerical evaluation
of the gamma-Z box is in agreement within errors with previous reports, albeit
somewhat larger in central value, and is within the uncertainty requirements of
current experiments.Comment: 4 pages, 4 figures, v2: reference added, typo fixe
Physical Activity and Functioning in Persons with Down Syndrome
The purpose of our research study was to examine if there was a relationship between PA and functioning in adults with DS. Our research study had 17 adults with Down syndrome participate. The functional performance of participants were measured with the Timed Up-and-Go test (TUG) and the 6-minute walk test (6MWT). After the testing session was completed, the physical activity of participants over seven days was measured. The main findings were that adults with DS had low levels of physical functioning and PA, and that physical functioning was associated with PA levels. Improving the functional profiles of adults with DS may aid these individuals in accumulating the amount of PA required for improving their health
FP-21-05 Median Age at Last Birth
Trends and differentials in the age at first birth are well-documented (FP-20-06). Given shifts and variation in completed family size (FP-20-04), it is also important to look at the age of last birth – that is, when do women stop having children – which has received very little attention. This profile investigates the median age at last birth among women at the end of their childbearing years, at 45-49 years old. Using the 2015-2019 cycles of the National Survey of Growth, this profile investigates the median age at last birth for mothers aged 45-49 by race/ethnicity, completed education, parity, and age at first birth
Results of a study of the stability of cointegrating relations comprised of broad monetary aggregates
There is strong evidence of a stable “money demand” relationship for MZM and M2 through the 1990s. Though the M2 relationship breaks down somewhere around 1990, evidence has been accumulating that the disturbance is well characterized as a permanent upward shift in M2 velocity that began around 1990 and was largely over by 1994. This paper’s results support the hypothesis that households permanently reallocated a portion of their wealth from time deposits to mutual funds. This reallocation may have been induced by depository restructuring, but it could also be explained by appropriately measured opportunity cost.Demand for money
Quantifying Undisturbed (Native) Lands in Eastern South Dakota: 2013
We employed simple GIS methods primarily utilizing the South Dakota Farm Service Agency’s Common Land Unit (CLU) data layers from 2013, along with 2012 US Department of Agriculture (USDA) National Agriculture Imagery Program (NAIP) county mosaic aerial imagery, to evaluate approximately 22.6 million acres of land in the 44 counties that comprise eastern South Dakota. Mapping of this total project area was done in three distinct project phases from 2014 through 2016. We utilized the CLU data layer, queried to show current and former cropland, to first identify and remove any areas with a cropping history, regardless of current land use. We then employed a step by step analysis to analyze the remaining land in approximately one mi2 sections in order to identify and remove additional historic or current land disturbances. The remaining land tracts were then categorized as potentially ‘undisturbed grassland’ or ‘undisturbed woodland’ by simple reason of deduction. Finally, we removed all known water bodies larger than 40 acres as defined by the South Dakota Department of Game, Fish, and Parks’ (SDGFP) Statewide Water Bodies layer in order to gain a more accurate interpretation of the remaining undisturbed grassland/wetland complex.
Overall, 5,488,025 acres (24.2%) of the approximately 22.6 million acres in eastern South Dakota were designated as potentially undisturbed. However, a small portion of the undisturbed acres did have certain indications suggesting historical disturbance, and thus were flagged as ‘go-back’ acres. A total of 214,981 acres of undisturbed land were flagged as potential go-back acres. The analysis of go-back acres varied between the three project phases.
Of the total approximately 22.6 million acre analysis area, approximately 14.9 million acres (65.9%) were deemed to have a cropping history according to the FSA CLU data, while approximately 1.6 million acres (6.9%) were found to have some type of land disturbance not indicated by a CLU crop code, for a total of 16.5 million acres (72.8%) of all lands with some type of proven disturbance history.
Within the total approximately 22.6 million acre evaluation area, approximately 1.4 million acres (6.1%) were found to have some sort of permanent protection from conversion (some of these acres have a disturbance history). Nearly 1 million acres of the approximately 5.5 million acres of undisturbed land (17.5%) had some level of permanent conservation protection status. In total, we identified 962,734 acres of undisturbed habitat that is protected from future conversion, representing only 4.3% of eastern South Dakota’s total land base.
Within eastern South Dakota we identified 531 wind turbines, of which 269 (50.7%) were located adjacent to potentially undisturbed areas. Only 41 (7.7%) were located adjacent to undisturbed lands permanently protected from land conversion.https://openprairie.sdstate.edu/data_land-easternSD/1000/thumbnail.jp
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