8,246 research outputs found

    Sterilization Assembly Development Laboratory - Monitoring plan

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    Monitoring plan with test requirements and procedures for sterilization assembly development laborator

    THE VALUE OF THE VIEW: VALUING SCENIC QUALITY USING CHOICE AND CONTINGENT VALUATION MODELS

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    Scenic beauty contributes to residents' quality of life and also serves to attract visitors to recreational areas. Because of the dynamic relationship between people, land, and rural development, there is an increasing interest in estimating the value of scenic quality using nonmarket valuation techniques. This study estimates the value of scenic quality to Blue Ridge Parkway visitors using choice and contingent valuation models. Results suggest that further research into respondent perceptions of CM and CVM models, and the conditions under which they yield comparable estimates, is warranted.Institutional and Behavioral Economics,

    Development of electrical test procedures for qualification of spacecraft against EID. Volume 2: Review and specification of test procedures

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    A combined experimental and analytical program to develop system electrical test procedures for the qualification of spacecraft against damage produced by space-electron-induced discharges (EID) occurring on spacecraft dielectric outer surfaces is described. A review and critical evaluation of possible approaches to qualify spacecraft against space electron-induced discharges (EID) is presented. A variety of possible schemes to simulate EID electromagnetic effects produced in spacecraft was studied. These techniques form the principal element of a provisional, recommended set of test procedures for the EID qualification spacecraft. Significant gaps in our knowledge about EID which impact the final specification of an electrical test to qualify spacecraft against EID are also identified

    In Re Retirement of Judges Litz and Woods

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    The Virginia Code of Professional Responsibility

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    The purposes of my comments are to: (1) outline the historical development of the Code of Professional Responsibility (CPR) in the organized bar in the United States; (2) summarize the important differences between the Virginia Code of Professional Responsibility (Virginia CPR) and its predecessor in Virginia; (3) discuss the reasons for the most significant of those changes; and (4) compare the important differences between the American Bar Association model adopted in August 1983 (the Kutak Model) and the Virginia CPR. For the sake of brevity, I will make no reference to the multiple editorial revisions in the Virginia CPR which do not involve changes of substance

    Environmental risk factors associated with bovine tuberculosis among cattle in high-risk areas (article)

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    This is the author accepted manuscript. The final version is available from the Royal Society via the DOI in this record.The associated datasets are in ORE at http://hdl.handle.net/10871/20666Our research shows that environmental features are important predictors of bovine tuberculosis (bTB) in British cattle herds in high-prevalence regions. Data from 503 case and 808 control farms included in the randomized badger culling trial (RBCT) were analysed. bTB risk increased in larger herds and on farms with greater areas of maize, deciduous woodland and marsh, whereas a higher percentage of boundaries composed of hedgerows decreased the risk. The model was tested on another case-control study outside RBCT areas, and here it had a much smaller predictive power. This suggests that different infection dynamics operate outside high-risk areas, although it is possible that unknown confounding factors may also have played a role.B.W. held a Daphne Jackson Fellowship and was supported by the BBSRC and the University of Exeter

    Effects of Line-tying on Magnetohydrodynamic Instabilities and Current Sheet Formation

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    An overview of some recent progress on magnetohydrodynamic stability and current sheet formation in a line-tied system is given. Key results on the linear stability of the ideal internal kink mode and resistive tearing mode are summarized. For nonlinear problems, a counterexample to the recent demonstration of current sheet formation by Low \emph{et al}. [B. C. Low and \AA. M. Janse, Astrophys. J. \textbf{696}, 821 (2009)] is presented, and the governing equations for quasi-static evolution of a boundary driven, line-tied magnetic field are derived. Some open questions and possible strategies to resolve them are discussed.Comment: To appear in Phys. Plasma

    Model Independent Primordial Power Spectrum from Maxima, Boomerang, and DASI Data

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    A model-independent determination of the primordial power spectrum of matter density fluctuations could uniquely probe physics of the very early universe, and provide powerful constraints on inflationary models. We parametrize the primordial power spectrum As2(k)A_s^2(k) as an arbitrary function, and deduce its binned amplitude from the cosmic microwave background radiation anisotropy (CMB) measurements of Maxima, Boomerang, and DASI. We find that for a flat universe with As2(k)=1A_s^2(k)=1 (scale-invariant) for scales k<0.001k<0.001 h/Mpc, the primordial power spectrum is marginally consistent with a scale-invariant Harrison-Zeldovich spectrum. However, we deduce a rise in power compared to a scale-invariant power spectrum for 0.001 h/{Mpc} \la k \la 0.01 h/{Mpc}. Our results are consistent with large-scale structure data, and seem to suggest that the current observational data allow for the possibility of unusual physics in the very early universe.Comment: substantially revised and final version, accepted by Ap

    The Division of the Lemniscate

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    Acute aortic dissection in a young healthy athlete with androgenic anabolic steroid use: A case report

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    Background: Acute aortic dissection can occur at the time of intense physical exertion in strength-trained athletes like weight lifters, bodybuilders, throwers, and wrestlers. Rapid rise in blood pressure and history of hypertension are the most common causes of aortic dissection in athletes. It is a very tragic event because of its high mortality rate of about 32% in young patients. We report a case of aortic dissection in a young weightlifter with a history of anabolic steroid usage with an extensive intimal tear of the aorta at Sino tubular junction and arch. All athletes must be assessed for predisposing factors for aortic dissection, and all patients should be encouraged to undergo appropriate diagnostic studies, like echocardiography and blood pressure monitoring while weightlifting to recognize possible predisposing factors for aortic dissection. Athletes who do have a problem should be encouraged to avoid or limit their exercise or activity by their cardiologist. It is vital that this disastrous event be prevented in young people. In conclusion, although a rare occurrence, AD should be considered in symptomatic patients with any family history of early cardiac deaths, a history suggestive of a connective tissue disorder (that is, multiple joint surgeries) or who practice weightlifting
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