15,526 research outputs found

    No Justice Given

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    I’ve spent a considerable amount of time analyzing privilege and looking at how systems in the United States often work to further oppress the vulnerable, while keeping the privileged in power. I have taken note of how my light skin, middle-class background, and young, abled body has given me opportunities and advantages others don’t have. But, I hadn’t thought too deeply about the privileges that come with being a natural born, American citizen. I’ve stood up to salute the flag every day in school, watched fireworks on the fourth of July, and generally felt proud to be an American; but, this doesn’t mean I really understood the advantages I’d been afforded based on where I happened to be born. After going on an immersion trip to the U.S.-Mexican border, I understand these benefits much more deeply. [excerpt

    The Space I Own

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    ***TRIGGER WARNING: Eating Disorders*** I don’t care what anyone says—being a woman is hard. Being a young woman has its own set of complications–we experience a lot of pressure to look a certain way, to act a certain way, to have a specific friend group; to act as social butterflies and to live up to a set of socially constructed beauty standards. And there are too many girls—myself included—who have fallen victim to this impossible set of expectations. [excerpt

    The Distributional Effects of the Tax Treatment of Child Care Expenses

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    Tax relief for child care expenses, encompassing the Child Care Tax Credit and Dependent Care Assistance Plans, is the largest federal government program in the United States aimed at helping families with child care. We examine the distributional effects of these policies among families with children using both the National Child Care Survey and tax return data. Among families that use tax relief, the benefits average 1.24 percent of family income. Benefits as a percentage of income vary systematically over the income distribution. Despite being regressive at low income levels (mainly due to the credit being non-refundable), tax relief is progressively distributed over most of the income distribution with the ratio of benefits to income falling above the bottom quintile of the income distribution. The benefits of tax relief also vary among families with the same income depending on a family's structure and its labor market and child care choices.

    The Basic Psychological Needs in Exercise Scale: Translation and Evidence for Cross-Cultural Validity

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    The present study reports on the psychometric evaluation and cross-cultural validity of the Basic Psychological Needs in Exercise Scale (BPNES; Vlachopoulos & Michailidou, 2006) translated from Greek into English. The data obtained from 346 British exercise participants supported the hypothesized 3-factor structure,showed satisfactory internal reliability coefficients, and offered evidence for the factor concurrent, discriminant, and nomological validity of the translated scale.Cross-cultural validity analyses across British and Greek participants supported configural invariance and partial metric, partial strong, and partial strict factorial invariance of the BPNES responses. The findings provide promising evidence for the validity and reliability of the translated BPNES and support the use of the scale in single-culture and cross-culture exercise-related motivational research within the self-determination theory framework

    An investigation of the basement complex aquifer system in Lofa county, Liberia, for the purpose of siting boreholes

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    Liberia is recovering from a 14 year civil war and only 51% of the rural population has access to safe drinking water. Little hydrogeological knowledge survives in Liberia, increasing the difficulty in successfully siting new boreholes. An understanding of the local hydrogeological environment is therefore needed to improve borehole site selection and increase success rates. This research provides a semi-quantitative characterization of the hydrogeological environment of the basement aquifer in Lofa county, Liberia. Based on literature review and analysis of borehole logs, the study has developed a conceptual hydrogeological model for the local conditions, which is further characterized using 2D geoelectrical sections. Groundwater is predominantly obtained from the saprolite and underlying fractured bedrock, but specific capacities (median 281 l h-1 m-1; 25th and 75th percentile of 179 and 490 l h-1 m-1, respectively) are constrained by the limited thickness of the saturated saprolite. This study has shown that the groundwater resources in the crystalline basement in this part of Liberia conform to the general conceptual model, allowing standard techniques used elsewhere for siting and developing groundwater to be used

    Reducing bias and quantifying uncertainty in watershed flux estimates: the R package loadflex

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    Many ecological insights into the function of rivers and watersheds emerge from quantifying the flux of solutes or suspended materials in rivers. Numerous methods for flux estimation have been described, and each has its strengths and weaknesses. Currently, the largest practical challenges in flux estimation are to select among these methods and to implement or apply whichever method is chosen. To ease this process of method selection and application, we have written an R software package called loadflex that implements several of the most popular methods for flux estimation, including regressions, interpolations, and the special case of interpolation known as the period-weighted approach. Our package also implements a lesser-known and empirically promising approach called the “composite method,” to which we have added an algorithm for estimating prediction uncertainty. Here we describe the structure and key features of loadflex, with a special emphasis on the rationale and details of our composite method implementation. We then demonstrate the use of loadflex by fitting four different models to nitrate data from the Lamprey River in southeastern New Hampshire, where two large floods in 2006–2007 are hypothesized to have driven a long-term shift in nitrate concentrations and fluxes from the watershed. The models each give believable estimates, and yet they yield different answers for whether and how the floods altered nitrate loads. In general, the best modeling approach for each new dataset will depend on the specific site and solute of interest, and researchers need to make an informed choice among the many possible models. Our package addresses this need by making it simple to apply and compare multiple load estimation models, ultimately allowing researchers to estimate riverine concentrations and fluxes with greater ease and accuracy
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