147 research outputs found

    Test results of the DOE/Sandia 17 meter VAWT

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    A review is given of the test program of a 17 meter Vertical Axis Wind Turbine VAWT. Performance test results are discussed including difficulties encountered during the VAWT operation along with ways of solving these problems

    Comparative physiological reactions of European and Indian cattle to changing temperature

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    "January, 1953.

    Effect of humidity on insensible weight loss, total vaporized moisture, and surface temperature in cattle.

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    Missouri Agricultural Experiment Station and the United States Department of Agriculture cooperating assisted by the Office of Naval Research."This bulletin is a report from the Department of Dairy Husbandry, research project No. 100, and Agricultural Engineering, research project No. 66 entitled 'Influence of climate factor on productivity'"--P. [2].Includes bibliographical references

    The Lowest Order Hadronic Contribution to the Muon g−2g-2 Value with Systematic Error Correlations

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    We have performed a new evaluation of the hadronic contribution to aμ=(g−2)/2a_{\mu}=(g-2)/2 of the muon with explicit correlations of systematic errors among the experimental data on σ(e+e−→hadrons)\sigma( e^+e^- \to hadrons ). Our result for the lowest order hadronic vacuum polarization contribution is aμhad=702.6(7.8)(14.0)×10−10 a_{\mu}^{had} = 702.6(7.8)(14.0) \times 10^{-10} where the the first error is statistical and the second is systematic. The total systematic error contributions from below and above s=1.4\sqrt{s} = 1.4 GeV are (13.1)×10−10(13.1) \times 10^{-10} and (5.1)×10−10(5.1) \times 10^{-10} respectively, and are hence dominated by the low energy region. Therefore, new measurements on σ(e+e−→hadrons)\sigma( e^+e^- \to hadrons ) below 1.4 GeV can significantly reduce the total error on aμhada_{\mu}^{had}. In particular, the effect on the total errors of new hypothetical data with 3 \% statistical and 0.5 - 1.0 \% systematic errors is presented.Comment: LaTeX with REVTeX style and options: multicol,aps,psfig. 18 pages, postscript figures included after text. Accepted in Phys. Rev. D (~ Sept 1996

    SEARCH FOR SLOWLY MOVING MAGNETIC MONOPOLES WITH THE MACRO DETECTOR

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    A search for slowly moving magnetic monopoles in the cosmic radiation was conducted from October 1989 to November 1991 using the large liquid scintillator detector subsystem of the first supermodule of the MACRO detector at the Gran Sasso underground laboratory. The absence of candidates established an upper limit on the monopole flux of 5.6 x 10(-15) cm-2 sr-1 s-1 at 90% confidence level in the velocity range of 10(-4) less than or similar to beta < 4 x 10(-3). This result places a new constraint on the abundance of monopoles trapped in our solar system

    Coronavirus disease 2019 (COVID-19) pandemic across Africa : current status of vaccinations and implications for the future

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    The introduction of effective vaccines in December 2020 marked a significant step forward in the global response to COVID-19. Given concerns with access, acceptability, and hesitancy across Africa, there is a need to describe the current status of vaccine uptake in the continent. An exploratory study was undertaken to investigate these aspects, current challenges, and lessons learnt across Africa to provide future direction. Senior personnel across 14 African countries completed a self-administered questionnaire, with a descriptive analysis of the data. Vaccine roll-out commenced in March 2021 in most countries. COVID-19 vaccination coverage varied from low in Cameroon and Tanzania and up to 39.85% full coverage in Botswana at the end of 2021; that is, all doses advocated by initial protocols versus the total population, with rates increasing to 58.4% in Botswana by the end of June 2022. The greatest increase in people being fully vaccinated was observed in Uganda (20.4% increase), Botswana (18.5% increase), and Zambia (17.9% increase). Most vaccines were obtained through WHO-COVAX agreements. Initially, vaccination was prioritised for healthcare workers (HCWs), the elderly, adults with co-morbidities, and other at-risk groups, with countries now commencing vaccination among children and administering booster doses. Challenges included irregular supply and considerable hesitancy arising from misinformation fuelled by social media activities. Overall, there was fair to reasonable access to vaccination across countries, enhanced by government initiatives. Vaccine hesitancy must be addressed with context-specific interventions, including proactive programmes among HCWs, medical journalists, and the public

    Search for slowly moving magnetic monopoles with the MACRO detector

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