14,392 research outputs found

    Temperature dependence of the spin and orbital magnetization density in Sm1xGdxAl2Sm_{1-x}Gd_{x} Al_{2} around the spin-orbital compensation point

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    Non-resonant ferromagnetic x-ray diffraction has been used to separate the spin and orbital contribution to the magnetization density of the proposed zero-moment ferromagnet Sm0.982Gd0.018Al2Sm_{0.982}Gd_{0.018} Al_{2}. The alignment of the spin and orbital moments relative to the net magnetization shows a sign reversal at 84K, the compensation temperature. Below this temperature the orbital moment is larger than the spin moment, and vice versa above it. This result implies that the compensation mechanism is driven by the different temperature dependencies of the 4f4f spin and orbital moments. Specific heat data indicate that the system remains ferromagnetically ordered throughout

    Phenomenological Analysis of pppp and pˉp\bar{p}p Elastic Scattering Data in the Impact Parameter Space

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    We use an almost model-independent analytical parameterization for pppp and pˉp\bar{p}p elastic scattering data to analyze the eikonal, profile, and inelastic overlap functions in the impact parameter space. Error propagation in the fit parameters allows estimations of uncertainty regions, improving the geometrical description of the hadron-hadron interaction. Several predictions are shown and, in particular, the prediction for pppp inelastic overlap function at s=14\sqrt{s}=14 TeV shows the saturation of the Froissart-Martin bound at LHC energies.Comment: 15 pages, 16 figure

    Estimating Threshold Effects of Generic Fluid Milk and Cheese Advertising

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    Replaced with revised version of paper 08/01/06.Livestock Production/Industries, Marketing,

    New distributed offline processing scheme at Belle

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    The offline processing of the data collected by the Belle detector has been recently upgraded to cope with the excellent performance of the KEKB accelerator. The 127/fb of data (120 TB on tape) collected between autumn 2003 and summer 2004 has been processed in 2 months, thanks to the high speed and stability of the new, distributed processing scheme. We present here this new processing scheme and its performance.Comment: 4 pages, 8 figures, uses CHEP2004.cl

    Numerical Study of Velocity Statistics in Steady Counterflow Quantum Turbulence

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    We investigate the velocity statistics by calculating the Biot--Savart velocity induced by vortex filaments in steady counterflow turbulence investigated in a previous study [Phys. Rev. B {\bf 81}, 104511 (2010)]. The probability density function (PDF) obeys a Gaussian distribution in the low-velocity region and a power-law distribution v3v^{-3} in the high-velocity region. This transition between the two distributions occur at the velocity characterized by the mean inter-vortex distance. Counterflow turbulence causes anisotropy of the vortex tangle, which leads to a difference in the PDF for the velocities perpendicular to and parallel to the counterflow.Comment: 4 pages, 7 figure

    Chemisorption and reactions on clusters of nickel atoms

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    The nucleation and growth of metallic clusters on a substantially amorphous substrate are discussed with emphasis on the geometrical and electronic structure of the clusters. Several clusters of different symmetry containing five to nine nickel atoms were studied. It was found that the energy range of primary d-like states is not significantly different from the width of the d-band states in nickel metal, as long as the interatomic distance is comparable to that in the bulk metal. The approach of one or more molecules to the cluster is examined using at the hydrogenation of acetylene and the dehydrogenation of ethylene as examples

    Technical Efficiency in Bangladesh Rice Production: Are There Threshold Effects in Farm Size?

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    Replaced with revised version of poster 07/21/10.Data Envelopment Analysis, Threshold Estimation, technical efficiency, total factor productivity, rice, farm size, Bangladesh, Community/Rural/Urban Development, International Development, Productivity Analysis,

    Crack initiation at notches in low cycle fatigue Final report, 1 Aug. 1968 - 15 Mar. 1969

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    Crack initiation at notches in low cycle fatigue determined by plastic strain distributio
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