8,796 research outputs found

    Production at High pTp_T in Central Au+Au and p+pp+p collisions at sNN=200\sqrt{s_{_{NN}}} = 200 GeV in STAR

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    he ρ0\rho^0 production at high-pTp_T (5.0 pT\leq p_T \leq 10.0 GeV/cc) measured in minimum bias p+pp+p, Au+Au and central Au+Au collisions in the STAR detector are presented. The ρ0/π\rho^0/\pi ratio measured in p+pp+p is compared to PYTHIA calculations as a test of perturbative quantum chromodynamics (pQCD) that describes reasonably well particle production from hard processes. The ρ0\rho^0 nuclear modification factor are also presented. In p+pp+p collisions, charged pions and (anti-)protons are measured in the range 5.0 pT\leq p_T \leq 15.0 GeV/cc and the anti-particle to particle ratio and the baryon to meson ratios of these hadrons are discussed.Comment: 4 pages, 8 figures, proccedings for QM200

    Spectroscopy of the 1S03P0^1S_0-{}^3P_0 Clock Transition of 87^{87}Sr in an Optical Lattice

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    We report on the spectroscopy of the 5s21S0(F=9/2)5s5p3P0(F=9/2)5s^2 {}^1S_0 (F=9/2) \to 5s5p {}^3P_0 (F=9/2) clock transition of 87Sr{}^{87}{\rm Sr} atoms (natural linewidth of 1 mHz) trapped in a one-dimensional optical lattice. Recoilless transitions with a linewidth of 0.7 kHz as well as the vibrational structure of the lattice potential were observed. By investigating the wavelength dependence of the carrier linewidth, we determined the magic wavelength, where the light shift in the clock transition vanishes, to be 813.5±0.9813.5\pm0.9 nm.Comment: 4 pages, 4 figures, submitted to Phys. Rev. Lett. (09/May/2003

    Frank Kenneth Ramsey - A Tribute

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    In the midmorning of Thursday, January 9, there was a routine cataract removal, an uneventful postoperative period, and the drive home. He lay down for a nap in the early afternoon, but he never awoke. The impact of the loss of Dr. Frank Ramsey is widely and keenly felt in the College of Veterinary Medicine, across the university, and in uncountable veterinary offices around the world. As evidence of what he\u27had meant to the college, he was named Clarence Covault Distinguished Professor, and he carried numerous other honors, such as Cardinal Key and Professor of the Year. As evidence of his impact on the international scene, he had been invited to visit in several countries on most of the continents to share his expertise on veterinary education and bovine mucosal disease. For several days after his death, flags in front of the College of Veterinary Medicine were flying at half-mast, because the college mourned the loss of one of her most illustrious sons

    CAMERA – Mobility Report 3

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    The EU-funded CAMERA (Coordination and Support Action for Mobility in Europe: Research and Assessment) project is coordinated by The Innaxis Foundation and Research Institute (Spain), in partnership with the University of Westminster (UK), Bauhaus Luftfahrt (Germany), EUROCONTROL (France-Belgium) and DeepBlue (Italy). It was launched in November 2017 for a duration of 48 months. The project investigates research initiatives into the European transport system from 2007, with a special focus on air travel, its integration with other transport modes, and passenger experience. Each year CAMERA assesses projects from different research programmes to deliver a European view of the state of aviation and mobility-related research activities. For this, the team relies on two main corner stones to its project approach: 1) the systematic development of a Performance Framework to provide a means of measuring; and 2) state-of-the-art algorithms for an automated analysis of the research projects

    DATASET2050 D3.2 - Future Passenger Demand Profile

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    The FlightPath 2050 goal of enabling 90 per cent of European passengers to complete their door-to-door journey within four hours is a very challenging task. A major objective of the DATASET2050 project is to deliver insight into both current and future processes relating to the European transport system in this context. The deliverable D3.2 "Future Passenger Demand Profile" focuses on the future demand side of European (air) transport. Namely, the first goal is to develop a range of passenger profiles for the year 2035 and to provide implications for passenger profiles for 2050. For this purpose, the development of passenger characteristics - including demographic, geographic, socio-economic and behavioural aspects as well as particular mobility patterns - is analysed using available European data and forecasts. Based on this analysis, on specific mobility behaviour of the different member states (EU28 and EFTA countries) as well as on a high-level-factor identification, six different passenger profiles for 2035 are developed. These six profiles differ by main travel purpose (private, business and leisure, which is the combination of business and leisure trips), predominant age group, income level (low, medium, high) and several other characteristics. Furthermore, a demand model is applied showing the high relevance of gross domestic product (GDP) and education for a steady growth of passenger traffic volume in the EU28 and EFTA countries until 2050. The outcomes of the current deliverable will be put in contrast with those coming from D4.2 (Future supply profile), enabling thus a comprehensive assessment on the European door-to-door mobility in the future. Specifically, the deliverable results will be used in D5.1 (Mobility assessment), D5.2 (Assessment execution) and D5.3 (Novel concept foundations for European mobility)

    Atypical Interstitial Pneumonia in the Bovine

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    On August 5, 1980, a dead 950 pound steer was submitted to the Iowa Veterinary Diagnostic Laboratory for necropsy (IVDL Case 18274). The history included acute dyspnea, raspy cough, a temperature of 40.5-41.7 C (105-107 F) in 20 out of 125 animals and two death.s These cattle had been purchased on July 17, 1980 and first noticed sick on August 4, 1980. The tentative diagnoses were Hemophilus pneumonia and viral pneumonia. Treatment included intravenous tetrayccline and intramuscular penicillin and resulted in a fairly good response

    Diffusion and jump-length distribution in liquid and amorphous Cu33_{33}Zr67_{67}

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    Using molecular dynamics simulation, we calculate the distribution of atomic jum ps in Cu33_{33}Zr67_{67} in the liquid and glassy states. In both states the distribution of jump lengths can be described by a temperature independent exponential of the length and an effective activation energy plus a contribution of elastic displacements at short distances. Upon cooling the contribution of shorter jumps dominates. No indication of an enhanced probability to jump over a nearest neighbor distance was found. We find a smooth transition from flow in the liquid to jumps in the g lass. The correlation factor of the diffusion constant decreases with decreasing temperature, causing a drop of diffusion below the Arrhenius value, despite an apparent Arrhenius law for the jump probability

    Ultrastable Optical Clock with Neutral Atoms in an Engineered Light Shift Trap

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    An ultrastable optical clock based on neutral atoms trapped in an optical lattice is proposed. Complete control over the light shift is achieved by employing the 5s21S05s5p3P05s^2 {}^1S_0 \to 5s5p {}^3P_0 transition of 87Sr{}^{87}{\rm Sr} atoms as a "clock transition". Calculations of ac multipole polarizabilities and dipole hyperpolarizabilities for the clock transition indicate that the contribution of the higher-order light shifts can be reduced to less than 1 mHz, allowing for a projected accuracy of better than 1017 10^{-17}.Comment: 4 pages, 2 figures, accepted for publication in Phys. Rev. Let

    Standardized Assessment of Concussion in football players

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    This is the publisher's version, also available electronically from http://www.neurology.org/content/48/3/586.Article abstract-The recent formulation of guidelines for the management of concussion in sports adopted by the American Academy of Neurology specifically calls for the development of a standardized, systematic sideline evaluation for the immediate assessment of concussion in athletes. The present study involved the preliminary investigation of the feasibility and clinical validity of a standardized version of a brief sideline examination complied in accordance with these guidelines. This examination, intended for use by athletic trainers, was administered by three trainers to 141 nonconcussed high school football players at three separate schools. All players suspected of suffering a concussion (N = 6) during the fall 1995 season were also tested immediately following their injury. The examination was easily administered and scored. The concussed players as a group scored significantly below the nonconcussed controls and below their own baseline (pre-injury) performance, despite their all having been considered by the trainers to have suffered mild, grade 1 concussions. Although preliminary, these data suggest that a standardized sideline examination of this type can be useful in detecting concussion and determining fitness to return to play
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