6,708 research outputs found

    How We Can Pay for Health Care Reform

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    Describes savings and revenue sources and policies to reduce healthcare spending that could finance comprehensive reform with a public option, such as reducing physician and hospital payments, investing in prevention programs, and capping tax exclusions

    Characteristics of smallholdings in New Zealand : results from a nationwide survey

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    This research investigated land use and the social and environmental effects of smallholding. The research was designed to provide a comprehensive understanding of smallholders and smallholdings by means of a nationwide survey. To conduct the survey a sample of 3,934 cases was randomly selected from the smallholding population of 0.04 to 40 hectares in size. The survey derived 947 usable responses with a revised response rate of 28 per cent. Analysis of the survey data was undertaken using three categories of smallholder. This analysis showed some differences between the lifestyler, hobby/smallfarmer and farmer/horticulturalist. There were noticeable differences, for example, in size, number of years of residence and amount of farm experience. However, there were no differences in terms of engagement in productive activities such as livestock and plant production. In further analysis it was found that almost all smallholders intend to plant trees for landscaping or commercial purposes. However, the analysis also showed that smallholders do not voluntarily engage in environmental monitoring and environmentally friendly practices to the same extent as other farmers and growers. In addition, the use of, and intentions to use, organic methods were not as prevalent as that for other farmers and growers. Nevertheless, it was also found that smallholders valued the merits of country life including peace and quiet and clean air. In discussion of the results emphasis is given to production and it is shown that while there appears to be high levels of production on some of the smallholdings the result is skewed by a small number of smallholders with high production income, while a sizable proportion did not report any income. Lack of difference between self declared lifestylers and other smallholders is discussed in terms of the common assumption that lifestylers engage less in farming activities. A discussion of environmental impacts predicts a 'greening' of the landscape due to smallholders' intending to plant various tree varieties

    Landsat Data Continuity Mission - Launch Fever

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    The year 2013 will be an exciting period for those that study the Earth land surface from space, particularly those that observe and characterize land cover, land use, and the change of cover and use over time. Two new satellite observatories will be launched next year that will enhance capabilities for observing the global land surface. The United States plans to launch the Landsat Data Continuity Mission (LDCM) in January. That event will be followed later in the year by the European Space Agency (ESA) launch of the first Sentinel 2 satellite. Considered together, the two satellites will increase the frequency of opportunities for viewing the land surface at a scale where human impact and influence can be differentiated from natural change. Data from the two satellites will provide images for similar spectral bands and for comparable spatial resolutions with rigorous attention to calibration that will facilitate cross comparisons. This presentation will provide an overview of the LDCM satellite system and report its readiness for the January launch

    Exhaustive enumeration unveils clustering and freezing in random 3-SAT

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    We study geometrical properties of the complete set of solutions of the random 3-satisfiability problem. We show that even for moderate system sizes the number of clusters corresponds surprisingly well with the theoretic asymptotic prediction. We locate the freezing transition in the space of solutions which has been conjectured to be relevant in explaining the onset of computational hardness in random constraint satisfaction problems.Comment: 4 pages, 3 figure

    Electron Transfer by Excited Benzoquinone Anions: Slow Rates for Two-Electron Transitions

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    Electron transfer (ET) rate constants from the lowest excited state of the radical anion of benzoquinone, BQ−•*, were measured in THF solution. Rate constants for bimolecular electron transfer reactions typically reach the diffusion-controlled limit when the free-energy change, ΔG°, reaches −0.3 eV. The rate constants for ET from BQ−•* are one-to-two decades smaller at this energy and do not reach the diffusion-controlled limit until −ΔG° is 1.5−2.0 eV. The rates are so slow probably because a second electron must also undergo a transition to make use of the energy of the excited state. Similarly, ET, from solvated electrons to neutral BQ to form the lowest excited state, is slow, while fast ET is observed at a higher excited state, which can be populated in a transition involving only one electron. A simple picture based on perturbation theory can roughly account for the control of electron transfer by the need for transition of a second electron. The picture also explains how extra driving force (−ΔG°) can restore fast rates of electron transfer

    Household food insecurity positively associated with increased hospital charges for infants

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    Objective: To test whether household food insecurity (HFI) was associated with total annual hospitalization charges, annual days hospitalized, and charges per day, among low-income infants (months) with any non-neonatal hospital stays. Methods: Administrative inpatient hospital charge data were matched to survey data from infants\u27 caregivers interviewed 1998-2005 in emergency departments in Boston and Little Rock. All study infants had been hospitalized at least once since birth; infants whose diagnoses were not plausibly related to nutrition were excluded from both groups. Log-transformed hospitalization charges were analyzed, controlling for site fixed effects. Results: 24% of infants from food-insecure households and 16% from food-secure households were hospitalized \u3e2 times (P=0.02). Mean annual inpatient hospital charges (6,707vs6,707 vs 5,735; P Conclusion: HFI was positively associated with annual inpatient charges among hospitalized low income infants. Average annual inpatient charges were almost $2,000 higher (inflation adjusted) for infants living in food-insecure households. Reducing or eliminating food insecurity could reduce health services utilization and expenditures for infants in low-income families, most of whom are covered by public health insurance

    Simple guide to starting a research group

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    Conducting cutting-edge research and scholarship becomes more complicated with each passing year; forming a collaborative research group offers a way to navigate this increasing complexity. Yet many individuals whose work might benefit from the formation of a collaborative team may feel overwhelmed by the prospect of attempting to build and maintain a research group. We propose this simple guide for starting and maintaining such an enterprise
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