230 research outputs found

    The Southern Appalachian Mountains: An Example of 6000 Years of Earth History

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    The geology of the Southern Appalachians Is better explained within a creation week (c. 4100 B.C.) /flood year (2500 B.C.) /post-flood, residual catastrophic model of earth history rather than one requiring billions of years. Six divisions of historical geology are proposed. It Is also suggested that the Flood had three phases

    Explanation for Anomalous Shock Temperatures Measured by Neutron Resonance Spectroscopy

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    Neutron resonance spectrometry (NRS) has been used to measure the temperature inside Mo samples during shock loading. The temperatures obtained were significantly higher than predicted assuming ideal hydrodynamic loading. The effect of plastic flow and non-ideal projectile behavior were assessed. Plastic flow was calculated self-consistently with the shock jump conditions: this is necessary for a rigorous estimate of the locus of shock states accessible. Plastic flow was estimated to contribute a temperature rise of 53K compared with hydrodynamic flow. Simulations were performed of the operation of the explosively-driven projectile system used to induce the shock in the Mo sample. The simulations predicted that the projectile was significantly curved on impact, and still accelerating. The resulting spatial variations in load, including radial components of velocity, were predicted to increase the apparent temperature that would be deduced from the width of the neutron resonance by 160K. These corrections are sufficient to reconcile the apparent temperatures deduced using NRS with the accepted properties of Mo, in particular its equation of state.Comment: near-final version, waiting for final consent from an autho

    Incommensurate magnetism near quantum criticality in CeNiAsO

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    Two phase transitions in the tetragonal strongly correlated electron system CeNiAsO were probed by neutron scattering and zero field muon spin rotation. For T<TN1T <T_{N1} = 8.7(3) K, a second order phase transition yields an incommensurate spin density wave with wave vector k=(0.44(4),0,0)\textbf{k} = (0.44(4), 0, 0). For T<TN2T < T_{N2} = 7.6(3) K, we find co-planar commensurate order with a moment of 0.37(5) μB0.37(5)~\mu_B, reduced to 30%30 \% of the saturation moment of the ±12|\pm\frac{1}{2}\rangle Kramers doublet ground state, which we establish by inelastic neutron scattering. Muon spin rotation in CeNiAs1xPxO\rm CeNiAs_{1-x}P_xO shows the commensurate order only exists for x \le 0.1 so the transition at xcx_c = 0.4(1) is from an incommensurate longitudinal spin density wave to a paramagnetic Fermi liquid

    A very conscientious brand: A case study of the BBC's current affairs series Panorama

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    The reputation of British current affairs and documentary series such as the BBC's Panorama, Channel 4’s Dispatches or the now defunct Granada series World in Action have rested on an image of conscientious ‘public service’. These popular, long running series have, at various points in their history, acted as the ‘conscience of the nation’, seeking to expose social injustice, investigate misdemeanours by the powerful and take on venal or corrupt vested interest. The BBC’s flagship current affairs series Panorama is Britain’s longest running television programme and, according to the Panorama website, ‘the world’s longest running investigative TV show’. It has provided a template for other current affairs series both in Britain, Europe and around the world while undergoing several transformations in form and style since its launch in 1953, the latest and arguably most dramatic being in 2007. This article will chart the development of Panorama as a distinctive, ‘flagship' current affairs series over six decades. It will attempt to answer why the Panorama brand has survived so long, while so many other notable current affairs series have not. Using research and material from Bournemouth University’s Panorama Archive, the Video Active website, the BFI and other European archives this article explores the development of an iconic current affairs series that has, at different stages in its history, proved a template for other news and current affairs programmes. Various breaks and continuities are highlighted in Panorama’s history and identity, and an attempt will be made to characterise and specify the Panorama ‘brand’ and pinpoint the series’ successes and failures in reinventing itself in a rapidly changing media context

    Self-Affirmation Improves Problem-Solving under Stress

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    High levels of acute and chronic stress are known to impair problem-solving and creativity on a broad range of tasks. Despite this evidence, we know little about protective factors for mitigating the deleterious effects of stress on problem-solving. Building on previous research showing that self-affirmation can buffer stress, we tested whether an experimental manipulation of self-affirmation improves problem-solving performance in chronically stressed participants. Eighty undergraduates indicated their perceived chronic stress over the previous month and were randomly assigned to either a self-affirmation or control condition. They then completed 30 difficult remote associate problem-solving items under time pressure in front of an evaluator. Results showed that self-affirmation improved problem-solving performance in underperforming chronically stressed individuals. This research suggests a novel means for boosting problem-solving under stress and may have important implications for understanding how self-affirmation boosts academic achievement in school settings. © 2013 Creswell et al

    The Wnt inhibitory factor 1 restoration in prostate cancer cells was associated with reduced tumor growth, decreased capacity of cell migration and invasion and a reversal of epithelial to mesenchymal transition

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    <p>Abstract</p> <p>Background</p> <p>Aberrations in the Wnt pathway have been reported to be involved in the metastasis of prostate cancer (PCa) to bone. We investigated the effect and underlying mechanism of a naturally-occurring Wnt inhibitor, WIF1, on the growth and cellular invasiveness of a bone metastatic PCa cell line, PC3.</p> <p>Results</p> <p>The WIF1 gene promoter was hypermethylated and its expression down-regulated in the majority (7 of 8) of PCa cell lines. Restoration of WIF1 expression in PC-3 cells resulted in a decreased cell motility and invasiveness via up-regulation of epithelial markers (E-cadherin, Keratin-8 and-18), down-regulation of mesenchymal markers (N-cadherin, Fibronectin and Vimentin) and decreased activity of MMP-2 and -9. PC3 cells transfected with WIF1 consistently demonstrated reduced expression of Epithelial-to-Mesenchymal Transition (EMT) transcription factors, Slug and Twist, and a change in morphology from mesenchymal to epithelial. Moreover, WIF1 expression significantly reduced tumor growth by approximately 63% in a xenograft mouse model. This was accompanied by an increased expression of E-cadherin and Keratin-18 and a decreased expression of vimentin in tumor tissues.</p> <p>Conclusion</p> <p>These data suggest that WIF1 regulates tumor invasion through EMT process and thus, may play an important role in controlling metastatic disease in PCa patients. Blocking Wnt signaling in PCa by WIF1 may represent a novel strategy in the future to reduce metastatic disease burden in PCa patients.</p

    Cost-Effectiveness of Asthma Step-Up Therapy as an Increased Dose of Extrafine-Particle Inhaled Corticosteroid or Add-On Long-Acting Beta2-Agonist

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    The analyses were funded by an unrestricted grant from Teva Pharmaceuticals Limited of Petach Tikva, Israel. Access to data from the Optimum Patient Care Research Database was co-funded by Research in Real-Life Ltd (RiRL), Cambridge, UK. All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this manuscript, take responsibility for the integrity of the work as a whole, and have given final approval to the version to be published. The authors thank Julie von Ziegenweidt for assistance with data extraction.Peer reviewedPublisher PD
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