4,107 research outputs found

    Thermal Dileptons from Hot and Dense Strongly Interacting Matter

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    The NA60 experiment at the CERN SPS has studied muon-pair production in 158A GeV In-In collisions. The unprecedented precision of the data has allowed to isolate a strong excess of pairs above the known sources in the whole invariant mass region 0.2<M<2.6 GeV. The (mostly) Planck-like shape of the mass spectra, exponential m_T spectra, zero polarization and the general agreement with thermal-model results allow for a consistent interpretation of the excess dimuons as thermal radiation from a randomized system. For M<1 GeV, the process pi+pi- -> rho -> mu+mu- dominates. The associated space-time averaged rho spectral function shows a nearly diverging width in approaching chiral symmetry restoration, but essentially no shift in mass. Some in-medium effects are also seen for the omega, but not for the phi. For M>1 GeV, the average temperature associated with the mass spectrum is about 200 MeV, considerably above T_c=170 MeV, implying a transition to dominantly partonic emission sources in this region. The transition itself is mirrored by a large jump-like drop in the inverse slope of the transverse mass spectra around 1 GeV.Comment: 10 pages, 6 figures, Proceedings of Chiral 2010 (Valencia, June 21-24, 2010

    Experimental Conference Summary

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    Experimental summary talk given at International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (QM2001), Stony Brook, New York, 15-20 Jan 2001.Comment: Proceedings of a summary talk given at International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (QM2001), Stony Brook, New York, 15-20 Jan 200

    Teaching vicarious trauma in the journalism classroom: an examination of educational provision in UK Universities

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    The connections between vicarious trauma and the viewing of violent User-Generated Content are becoming an increasingly important topic in journalism. As more journalist work begins to rely, or at least incorporate UGC, the risks to journalists have been shown to increase. This can lead to short, unpleasant careers, and in some cases, serious, long lasting mental health risks. Yet while this discussion is beginning to unfold in the newsroom, universities are lagging behind in their understanding of the topic. This paper, through content analysis of undergraduate course materials, and through interviews with lecturers and journalists, found that almost no course in the UK is teaching the risks of vicarious trauma or UGC. It was found that while some educators wish to make more of the topic, a number of institutional factors, such as lack of training and time, worries over duty of care, and available resources make this a difficult, if not impossible task. The paper recommends a new emphasis is placed on vicarious trauma, coupled with training and interdepartmental support

    Helminth infections: enabling the World Health Organization road map

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    Helminthiases are considered among the most persistent public health problems. Control and/or elimination remains a global health challenge and the World Health Organization Road Map highlights critical gaps and actions required to reach the 2030 targets, among them the need for new and more effective treatment options. Stronger collaborations across different fields are required to reach these goals. The helminth elimination platform is one example of how knowledge of two different disease areas can be aligned to fuse expertise and break disease silos

    Research Notes: Evaluation of some soybean isolines in irrigation culture

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    About 9% of the total soybean acreage and about 50% of the total corn acreage in Nebraska was irrigated at least once during the growing season in 1975. The 1975 state averages for irrigated soybeans and irrigated corn were 2220 and 7605 kg/ha respectively. Obviously, this yield differential (in relation to the price and production cost differentials) accounts for the reason most farmers utilize their irrigated acreage for corn rather than soybeans

    Local texture and percolative paths for long-range conduction in high critical current density TlBa₂Ca₂Cu₃O₈₊ₓ deposits

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    ©1994 American Institute of Physics. The electronic version of this article is the complete one and can be found online at: http://link.aip.org/link/?APPLAB/64/106/1DOI:10.1063/1.110908A possible microstructural origin of the high critical current densities which have been obtained in c-axis-aligned, polycrystalline TlBa₂Ca₂Cu₃O₈₊ₓdeposits has been identified. The results of x-ray diffraction determinations of basal plane texture of Tl-1223 deposits prepared by spray pyrolysis are observed to depend on the size of the x-ray beam. Furthermore, most grain boundaries were found from transmission electron microscopy to have small misorientation angles. It is concluded that although overall the basal plane orientations are nearly random, there is a high degree of local texture indicative of colonies of similarly oriented grains. The spread in a-axis orientation within a colony is ~10°–15°. Intercolony conduction, it is suggested, may be enhanced by a percolative network of small-angle grain boundaries at colony interfaces

    Photon-Photon Entanglement with a Single Trapped Atom

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    An experiment is performed where a single rubidium atom trapped within a high-finesse optical cavity emits two independently triggered entangled photons. The entanglement is mediated by the atom and is characterized both by a Bell inequality violation of S=2.5, as well as full quantum-state tomography, resulting in a fidelity exceeding F=90%. The combination of cavity-QED and trapped atom techniques makes our protocol inherently deterministic - an essential step for the generation of scalable entanglement between the nodes of a distributed quantum network.Comment: 5 pages, 4 figure

    The Septuagint vs. The Masoretic Text … A Statistical Perspective

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    Introduction (Background): This paper continues the discussion on whether the Hebrew Masoretic Text (MT) or the Greek Septuagint (LXX) more accurately preserves the original chronology of the patriarchs. For context, the LXX indicates we are approximately 7,500 years Anno Mundi (year after creation or AM) while the MT indicates we are approximately 6,000 years AM. This paper focuses on post flood chronology (Noah to Moses) due to the opportunity to use the concept of biological decay curves and statistical comparison. Additional chronologies or historical data points are provided for additional insight. Methods: Assuming the concept of a genetic biological decay curve in the post flood chronology (length of patriarch’s life) is legitimate, both the MT and LXX chronologies are used with Microsoft Excel curve fitting to data function to generate power curves that best fit their respective data. A statistical approach using the R-squared coefficient of determination (a confidence measure of data to curve) for both the MT and LXX should provide an indication which text more accurately captures the concept of post flood biological genetic decay and hence which text more accurately preserves the original chronology. This indication may also be supported by Benford’s law of anomalous numbers, and visual comparison to provide additional context on the legitimacy of the R-squared comparative results. Macro comparison of chronologies alluded to in various other text and flood stories (preferably separate from Greek and Hebrew influence) are examined for additional insight providing they cluster around LXX or MT chronological data points. Results: The R-Squared comparison shows that the MT curve has a 7% higher confidence measure of data to curve as compared to the LXX. Visual inspection of the curves identifies anomalous deltas (LXX vs MT lifespan) consistent with a lower R-square confidence measure. Macro comparison of chronologies from various other historical texts does show a clustering of chronology data points that inclines toward the MT. Conclusions: The statistical comparison and analysis suggest that the Masoretic Text may contain the more accurate preservation of the original chronology of the patriarchs. Examination of others chronologies supports the statistical results
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