2,519 research outputs found

    Immigrants and Their Voting Power in Nevada

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    This Fact Sheet presents the number of both documented and undocumented immigrants in Nevada, synthesizing data provided by New American Economy (NAE), a bipartisan research non-profit organization. To estimate the total number of immigrants in the U.S. and across each of the 50 states, researchers reviewed various data sources including the U.S. Census, the American Community Survey, the Center for Migration Studies, and the United States Citizenship and Immigration Services (USCIS)

    Metro Monitor 2020: Las Vegas & Reno

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    This Fact Sheet presents changes in indicators of economic health for the State of Nevada using data provided by the Brookings Institution’s Metro Monitor analysis. Looking beyond gross domestic product (GDP) and job growth, researchers at Brookings’ Metropolitan Policy Program measure various indicators of economic well-being across 192 metropolitan statistical areas (MSAs) for a 1-year period (from 2017-2018) and a 10-year period (from 2008-2018). Metro areas are classified by size: midsized metros (with populations between 250,000 and 500,000), large metros (with populations between 500,000 and 1 million), and very large metros (with populations over 1 million). For the purpose of this Fact Sheet, data for the Las Vegas-Henderson-Paradise, NV MSA and the Reno, NV MSA are extracted and synthesized

    Profits, Costs, and the Changing Structure of Dairy Farming

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    U.S. dairy production is consolidating into fewer but larger farms. This report uses data from several USDA surveys to detail that consolidation and to analyze the financial drivers of consolidation. Specifically, larger farms realize lower production costs. Although small dairy farms realize higher revenue per hundredweight of milk sold, the cost advantages of larger size allow large farms to be profitable, on average, even while most small farms are unable to earn enough to replace their capital. Further survey evidence, as well as the financial data, suggest that consolidation is likely to continue.Dairy farming, economies of scale, economies of size, dairy farm structure, milk costs, Farm Management, Industrial Organization, Livestock Production/Industries,

    Negative correlation does not imply a tradeoff between growth and reproduction in California oaks

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    A tradeoff between growth and reproduction, often inferred from an inverse correlation between these two variables, is a fundamental paradigm of life-history evolution. Oak species provide a unique test of this relationship because different species mature acorns either in the year of pollination or in the year after pollination. This difference allows for an interspecific comparison testing whether the apparent tradeoff is causal or the result of confounding factors influencing growth and reproduction independently. Based on 13 years of data on five California oak species, we found significant negative correlations between radial growth and seed production in the three species that produce acorns the same year in which pollination occurs, but not in two species that mature acorns the year after pollination. Rainfall, which correlates positively with radial growth and correlates negatively with acorn production (based on the year of pollination), appears to be driving this pattern. We conclude that the observed negative correlations are not causal, but rather a consequence of growth and reproduction being dependent, in opposite ways, on environmental conditions. Thus, contrary to the current consensus, growth and reproduction in these species are apparently largely independent of each other. In contrast, tradeoffs between current and future reproduction appear to be much more important in the life-history evolution of these long-lived plants. We also conclude that a negative correlation does not necessarily imply a causal mechanism and should not be used as the only evidence supporting a tradeoff

    Testing the Terminal Investment Hypothesis in California Oaks

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    The terminal investment hypothesis—which proposes that reproductive investment should increase with age-related declines in reproductive value—has garnered support in a range of animal species but has not been previously examined in long-lived plants, such as trees. We tested this hypothesis by comparing relative acorn production and radial growth among 1,0001 mature individuals of eight species of California oaks (genus Quercus) followed for up to 37 years, during which time 70 trees died apparently natural deaths. We found no significant differences in the radial growth, acorn production, or index of reproductive effort, taking into consideration both growth and reproduction among dying trees relative to either conspecific trees at the same site that did not die or growth and reproduction from earlier years for the focal trees that did eventually die. Furthermore, we found no consistent trade-off between growth and reproduction among trees that died, nor did dying trees significantly alter their relative investment in reproduction even as they underwent physical decline. Trees approaching the end of their lives are often in poor physical condition but do not appear to differentially invest more of their diminished resources in reproduction compared with healthy trees

    Tax Levy Financing for Local Public Health: Relationships between Fiscal Allocation, Fiscal Effort and Fiscal Capacity

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    This study examines property tax levy (local tax levy) as a source of local health department (LHD) funding during a five year period (2006-2010) in all Minnesota counties by assessing fiscal effort, fiscal allocation and fiscal capacity. Local health departments rely on pluralistic funding from local, state, federal and private sources. However, local tax levy funding is unexplored and little is known regarding the extent of fiscal allocation (tax levy used for LHD), fiscal effort (potential amount of tax levy available for LHD), and fiscal capacity (wealth of community). More important it is not known to what extent variation between local jurisdictions fluctuated over time, how they are offset by declining funding from other sources, or whether other sources supplement total tax levy reductions. It is essential to explore these issues to provide a basic understanding of fiscal drivers for ongoing services. Our findings indicate that from 2006 to 2010 the local tax levy for public health as a percent of total local health department expenditures decreased 6.7%, while local tax levy for public health as a percent of total tax levy decreased 14.6%. However, during this time period the total per capita tax levy for all services increased 25.2%

    Proximity induced time-reversal topological superconductivity in Bi2Se3 films without phase tuning

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    Many proposals to generate a time-reversal invariant topological superconducting phase are based on imposing a π phase difference between the superconducting leads proximitizing a nanostructure. We show that this phase can be induced on a thin film of a topological insulator like Bi2Se3 in proximity to a single s-wave superconductor. In our analysis we take into account the parity degree of freedom of the electronic states which is not included in effective Dirac-like surface theories. We find that the topological phase can be reached when the induced interparity pairing dominates over the intraparity one. Application of an electric field perpendicular to the film extends the range of parameters where the topological phase occurs.Fil: Casas, Oscar E.. Universidad Nacional de Colombia; Colombia. Universidad Autónoma de Madrid; EspañaFil: Arrachea, Liliana del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; ArgentinaFil: Herrera, William J.. Universidad Nacional de Colombia; ColombiaFil: Levy Yeyati, Alfredo. Universidad Autónoma de Madrid; Españ

    DNA Methylation Arrays as Surrogate Measures of Cell mixture Distribution

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    There has been a long-standing need in biomedical research for a method that quantifies the normally mixed composition of leukocytes beyond what is possible by simple histological or flow cytometric assessments. The latter is restricted by the labile nature of protein epitopes, requirements for cell processing, and timely cell analysis. In a diverse array of diseases and following numerous immune-toxic exposures, leukocyte composition will critically inform the underlying immuno-biology to most chronic medical conditions. Emerging research demonstrates that DNA methylation is responsible for cellular differentiation, and when measured in whole peripheral blood, serves to distinguish cancer cases from controls
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