2,717 research outputs found

    QCD on a transverse lattice

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    We present results from a transverse lattice study of low lying mesons. Special emphasis is put on the issue of Lorentz invariant energy-momentum dispersion relations for these mesons. The light-cone wave function for the π\pi obtained in this framework is very close to its asymptotic shape.Comment: 10 pages, sprocl.sty, invited talk given at 5th International Workshop on Particle Phyiscs Phenomenology, Chi-Pen, Taitung, Taiwan, 8-11 Nov 200

    A Study of Heavy-Light Mesons on the Transverse Lattice

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    We present results from a study of meson spectra and structure in the limit where one quark is infinitely heavy. The calculations, based on the framework of light-front QCD formulated on a transverse lattice, are the first non-perturbative studies of B-mesons in light-front QCD. We calculate the Isgur-Wise form factor, light-cone distribution amplitude, the heavy-quark parton distribution function and the leptonic decay constant of B-mesons.Comment: 5 pages, 3 figures, Revtex, corrected typos, added references, included moment

    Unofficial Detours : Guidelines for LPA\u27s

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    Responding to the crisis: Economic stabilisation grants

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    This article reviews some of the mainstream policies proposed to tackle the economic crisis of 2008-09 and its aftermath, and goes on to advocate a policy of economic stabilisation grants (ESGs). It argues that ESGs, which would be paid to every citizen at a rate that could be varied according to the severity of the crisis, would be more effective in boosting aggregate demand and more efficient in terms of resource allocation. Unlike the alternatives, ESGs would also address directly two key issues deriving from the process of globalisation, namely the growth of systemic uncertainty and rising inequality

    Salient Object Detection Techniques in Computer Vision-A Survey.

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    Detection and localization of regions of images that attract immediate human visual attention is currently an intensive area of research in computer vision. The capability of automatic identification and segmentation of such salient image regions has immediate consequences for applications in the field of computer vision, computer graphics, and multimedia. A large number of salient object detection (SOD) methods have been devised to effectively mimic the capability of the human visual system to detect the salient regions in images. These methods can be broadly categorized into two categories based on their feature engineering mechanism: conventional or deep learning-based. In this survey, most of the influential advances in image-based SOD from both conventional as well as deep learning-based categories have been reviewed in detail. Relevant saliency modeling trends with key issues, core techniques, and the scope for future research work have been discussed in the context of difficulties often faced in salient object detection. Results are presented for various challenging cases for some large-scale public datasets. Different metrics considered for assessment of the performance of state-of-the-art salient object detection models are also covered. Some future directions for SOD are presented towards end

    B-Mesons on the Transverse Lattice

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    We present results from a first study of BB-mesons that is based on a transverse lattice formulation of light-front QCD. The shape of the Isgur-Wise form factor is in very good agreement with experimental data. However, the calculations yield rather large values for fBf_B and Λˉ\bar{\Lambda} compared to contemporary calculations based on other techniques.Comment: invited talk given at CSSM workshop on `Lattice Hadron Physics', Cairns, July 2001 and at ECT* workshop on `Light-cone Physics: Particles and String', Trento, Sept. 200

    Studies on a fusarium disease of corn and sorghum (Preliminary)

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    A new fusarium disease of corn made its appearance in Iowa, during the season of 1914, seriously injuring the corn crop 01\u27 the state and causing a loss estimated at more than $15,000,000. It was not confined to Iowa, for reports of a similar disease were sent to the Iowa Agricultural Experiment station by H. B. Clark of Blair, Neb., who found an abundance of it there and elsewhere in that state. One of the authors observed the fusarium that same season in western I Illinois and northern Missouri and Dr. E. C. Stakman reported that it occurred in Minnesota. In the following year, 1915, the disease was again abundant, tho not as severe as in 1914
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