14,662 research outputs found

    Muck and Magic: A Resilience Lens on Organic Conversions as Transformation

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    This is the final version. Available on open access from Taylor & Francis via the DOI in this recordTransformation creates space to consider the profound changes necessary for society to pursue just and sustainable social-ecological systems. Transformation involves profound and complex change, yet there are few empirical studies that analyze transformation across multiple spheres of a social-ecological system. This article aims to address this gap by applying a resilience lens to analyze transformation as a component of UK farmers’ conversions of farmland from conventional to organic status. Transformation is identified as profound shifts in farmer understanding and management of soil fertility. The analysis finds that these transformations involve interplay between changes and scalar processes across political, practical, and personal spheres of transformation. Changes in the political sphere contradictorily drive, enable, and constrain transformation across political, practical, and personal spheres. We conclude that the empirical resilience analysis of transformation across spheres of a social-ecological system generates insights into the critical processes and changes necessary for society to pursue sustainable futures.Economic and Social Research Council (ESRC

    Pre-Eclampsia: Renal and Hepatic Factors in Relation to Proteins

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    Abstract Not Provided

    Applications of CFD and visualization techniques

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    In this paper, three applications are presented to illustrate current techniques for flow calculation and visualization. The first two applications use a commercial computational fluid dynamics (CFD) code, FLUENT, performed on a Cray Y-MP. The results are animated with the aid of data visualization software, apE. The third application simulates a particulate deposition pattern using techniques inspired by developments in nonlinear dynamical systems. These computations were performed on personal computers

    PET and P300 Relationships in Early Alzheimer\u27s Disease

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    The P300 (P3) wave of the auditory brain event-related potential was investigated in patients with probable Alzheimer\u27s disease to determine whether P300 latency discriminated these patients from controls and whether prolonged P300 latency correlated with rates of brain glucose metabolism as measured by Positron Emission Tomography. P300 latency was prolonged by more than 1.5 standard deviations from age expectancy in 14 of 18 patients, but none of 17 controls. In these subjects P300 latency was shown to be inversely correlated with relative metabolic rates of parietal and, to a lesser extent, temporal and frontal association areas, but not with subcortical areas

    Thought Experiments: State of the Art

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    Positivity of Entropy in the Semi-Classical Theory of Black Holes and Radiation

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    Quantum stress-energy tensors of fields renormalized on a Schwarzschild background violate the classical energy conditions near the black hole. Nevertheless, the associated equilibrium thermodynamical entropy ΔS\Delta S by which such fields augment the usual black hole entropy is found to be positive. More precisely, the derivative of ΔS\Delta S with respect to radius, at fixed black hole mass, is found to vanish at the horizon for {\it all} regular renormalized stress-energy quantum tensors. For the cases of conformal scalar fields and U(1) gauge fields, the corresponding second derivative is positive, indicating that ΔS\Delta S has a local minimum there. Explicit calculation shows that indeed ΔS\Delta S increases monotonically for increasing radius and is positive. (The same conclusions hold for a massless spin 1/2 field, but the accuracy of the stress-energy tensor we employ has not been confirmed, in contrast to the scalar and vector cases). None of these results would hold if the back-reaction of the radiation on the spacetime geometry were ignored; consequently, one must regard ΔS\Delta S as arising from both the radiation fields and their effects on the gravitational field. The back-reaction, no matter how "small",Comment: 19 pages, RevTe

    Medical Technology Transfer

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    The Biomedical Applications Team program sponsored by the National Aeronautics and Space Administration is an effective means for transferring aerospace technology to applications in medicine. A conceptual framework for medical technology transfer is presented to describe the transfer process in medicine and to supply a rationale for the Biomedical Applications Team methodology. Examples illustrate medical technology transfer at the material, design, and capacity levels. The roles of donor, recipient, and transfer agent are illustrated and factors essential to the success of medical technology transfer are summarized

    Summary of Archeological Investigations Conducted Under Texas Antiquities Permit No. 4207 for the Texas Department of Transportation, Gonzales, Caldwell, Williamson, Bastrop, and Hill Counties, Texas

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    In July 2006, the Texas Department of Transportation contracted TRC Environmental Corporation to conduct four surveys without geological evaluation under Contract #575XXSA008. All four investigations were subsumed under Texas Antiquities Permit No. 4207, with J. Michael Quigg serving as Principal Investigator. Fieldwork for all four investigations was performed by Dana Anthony and David O. Brown. All field work was conducted between July 2006 and October 2006. The projects were located in Gonzales and Caldwell County, Williamson County, Bastrop County, and Hill County. Final preparation of this report was performed by Marisol Espino and James Abbott, based upon drafts provided by TRC Environmental, with James T. Abbott assuming the role of Principal Investigator. Task 1 – This project consisted of improvements to US 183, from IH10 to a point 0.29 miles north of Business 183 in Gonzales (Gonzales and Caldwell County). The project would widen the roadway to construct an auxiliary lane at five locations. The completed project would provide three 12-foot travel lanes with 10-foot shoulders. A 100% survey of the seven bridge crossings and the 3,000-foot section was conducted, and 10 shovel tests, 6 auger tests and 18 backhoe trenches were excavated, during this project. A total of 28.52 acres were examined between July 26, 2006 and August 4, 2007. Six new archeological sites were recorded. These include one site each at the Plum Creek tributary (41CW102), Mule Creek (41GZ213), the 3000-foot section at the unnamed creek (41GZ216), and Canoe Creek (41GZ217), and two sites (41GZ214 and 41GZ215) at the Artesia Creek crossing. None of the sites was judged to retain sufficient integrity to merit additional work. The SHPO concurred with this recommendation on September 28, 2006. Task 2 – This project entailed replacing the bridge and approaches on FM 619 at Dry Brushy Creek in Williamson County. The existing bridge would be replaced by a longer and wider bridge aligned several m to the east of the existing roadway, and the approaches would be reworked to meet the new bridge. About 4.6 acres of new ROW would be required. A total of 12 acres were examined between August 17, 2006 and August 31, 2006 by Dana Anthony and David O. Brown. The pedestrian survey did not identify any intact cultural materials on the surface or in the cut banks of Dry Brushy Creek. No further work was recommended. The SHPO concurred with this recommendation on October 12, 2006. Task 3 – This project entailed replacing a bridge and approaches on County Road 143 (also known as Stockdale Ranch Road) at West Yegua Creek in Bastrop County, Texas. The existing bridge was replaced by a longer and wider bridge that was aligned several m to the east. A total of 2 acres were surveyed on October 24, 2006 by Dana Anthony and David O. Brown. The surface inspection of the project area was negative as were the four trenches excavated. No prehistoric or historic archeological remains were identified. Based on the negative survey, the project was placed on TxDOT’s weekly list of projects requiring no further work on December 7, 2006. Task 4 – This project entailed improvements to 8.7 mi of SH31 in Hill County, including constructing a new 5.4 mi bypass south of the town of Hubbard on new location. The overall project consisted of 277 acres of ROW. TxDOT identified four areas totaling approximately 50 acres with reasonable potential to contain archeological sites with sufficient integrity to qualify as historic properties under NHPA or for listing as a State Archeological (now Antiquities) Landmark (SAL). A total of 50 acres were examined between September 27 – 29, 2006 and then again between October 5 – 6, 2006 by Dana Anthony and David O. Brown. No prehistoric archeological remains were identified. Historic archeological remains consisting of some standing farm outbuildings were recorded as site 41HI295. No associated subsurface deposits were located at the site, and aerial photography suggested that the farmhouse was outside the project area of potential effect (APE). Accordingly, the portion of the site in the APE was judged to require no further work. The SHPO concurred with this finding on November 3, 2006
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