3,274 research outputs found

    ESTIMATING THE EFFECT OF THE SPECIAL SUPPLEMENTAL NUTRITION PROGRAM FOR WOMEN, INFANTS AND CHILDREN (WIC) ON CHILDREN'S HEALTH

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    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

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    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 F1,2,3γZ(x,Q2)F_{1,2,3}^{\gamma Z}(x,Q^2) in the resonance region. The off-diagonal structure functions are important for the accurate calculation of the γZ\gamma Z-box correction to the weak charge of the proton. Currently, with no data to determine F1,2,3γZ(x,Q2)F_{1,2,3}^{\gamma Z}(x,Q^2) 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 F1,2,3γZ(x,Q2)F_{1,2,3}^{\gamma Z}(x,Q^2) 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

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    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?

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    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

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    Parity-violating (PV) elastic electron-proton scattering measures Q-weak for the proton, QWpQ_W^p. To extract QWpQ_W^p from data, all radiative corrections must be well-known. Recently, disagreement on the gamma-Z box contribution to QWpQ_W^p 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

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    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

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    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

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    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

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    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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