3,404 research outputs found

    12-Month Continuous Eligibility in Medicaid: Impact on Service Utilization

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    Summarizes findings on how allowing Medicaid enrollees to remain enrolled without reapplying for twelve months affected the number of Medi-Cal-enrolled children's emergency room visits and physician visits compared with those with discontinuous coverage

    Number of Uninsured Jumped to More Than Eight Million from 2007 to 2009

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    Updates 2007 California Health Interview Survey data with estimates for 2009 population growth and changes in insurance status among the non-elderly. Examines trends by source of coverage and explores contributing factors

    Age-related shifts in bacterial diversity in a reef coral

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    This study investigated the relationship between microbial communities in differently sized colonies of the massive coral Coelastrea aspera at Phuket, Thailand where colony size could be used as a proxy for age. Results indicated significant differences between the bacterial diversity (ANOSIM, R = 0.76, p = 0.001) of differently sized colonies from the same intertidal reef habitat. Juvenile and small colonies (28 cm mean diam). Bacterial diversity increased in a step-wise pattern from juvenilessmallmedium colonies, which was then followed by a slight decrease in the two largest size classes. These changes appear to resemble a successional process which occurs over time, similar to that observed in the ageing human gut. Furthermore, the dominant bacterial ribotypes present in the tissues of medium and large sized colonies of C. aspera, (such as Halomicronema, an Oscillospira and an unidentified cyanobacterium) were also the dominant ribotypes found within the endolithic algal band of the coral skeleton; a result providing some support for the hypothesis that the endolithic algae of corals may directly influence the bacterial community present in coral tissues.Barbara Brown recieved funding from the Leverhulme Trust [www.leverhulme.ac.uk]; Grant number: EM-2013-058. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript

    The Absolute Magnitude Distribution of Kuiper Belt Objects

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    Here we measure the absolute magnitude distributions (H-distribution) of the dynamically excited and quiescent (hot and cold) Kuiper Belt objects (KBOs), and test if they share the same H-distribution as the Jupiter Trojans. From a compilation of all useable ecliptic surveys, we find that the KBO H-distributions are well described by broken power-laws. The cold population has a bright-end slope, α1=1.50.2+0.4\alpha_{\textrm{1}}=1.5_{-0.2}^{+0.4}, and break magnitude, HB=6.90.2+0.1H_{\textrm{B}}=6.9_{-0.2}^{+0.1} (r'-band). The hot population has a shallower bright-end slope of, α1=0.870.2+0.07\alpha_{\textrm{1}}=0.87_{-0.2}^{+0.07}, and break magnitude HB=7.70.5+1.0H_{\textrm{B}}=7.7_{-0.5}^{+1.0}. Both populations share similar faint end slopes of α20.2\alpha_2\sim0.2. We estimate the masses of the hot and cold populations are 0.01\sim0.01 and \sim3\times10^{-4} \mbox{ M_{\bigoplus}}. The broken power-law fit to the Trojan H-distribution has α1=1.0±0.2\alpha_\textrm{1}=1.0\pm0.2, α2=0.36±0.01\alpha_\textrm{2}=0.36\pm0.01, and HB=8.3H_{\textrm{B}}=8.3. The KS test reveals that the probability that the Trojans and cold KBOs share the same parent H-distribution is less than 1 in 1000. When the bimodal albedo distribution of the hot objects is accounted for, there is no evidence that the H-distributions of the Trojans and hot KBOs differ. Our findings are in agreement with the predictions of the Nice model in terms of both mass and H-distribution of the hot and Trojan populations. Wide field survey data suggest that the brightest few hot objects, with Hr’3H_{\textrm{r'}}\lesssim3, do not fall on the steep power-law slope of fainter hot objects. Under the standard hierarchical model of planetesimal formation, it is difficult to account for the similar break diameters of the hot and cold populations given the low mass of the cold belt.Comment: Accepted to the Astrophysical Journa

    The State of Health Insurance in California: Findings From the 2003 California Health Interview Survey

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    Provides an overview of the shift from job-based health insurance to enrollment in public insurance programs, and discusses the advantages and disadvantages of key public policy options to extend coverage to California's uninsured residents
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