987 resultados para Sections 10


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This draft final assessment report presents an assessment of the Development Account project Improving the Management of Resources for the Environment in Latin America and the Caribbean. commissioned by the Economic Commission for Latin America and the Caribbean (ECLAC). The report is made up of the following sections: Introduction, assessment management,findings and analysis. and lessons learnt, best practices and recommendations.

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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Fundao de Amparo Pesquisa do Estado de So Paulo (FAPESP)

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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)

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A measurement of differential cross sections for the production of a pair of isolated photons in proton-proton collisions at root s = 7 TeV is presented. The data sample corresponds to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector. A data-driven isolation template method is used to extract the prompt diphoton yield. The measured cross section for two isolated photons, with transverse energy above 40 and 25 GeV respectively, in the pseudorapidity range vertical bar eta vertical bar < 2.5, vertical bar eta vertical bar (sic) [1.44, 1.57] and with an angular separation Delta R > 0.45, is 17.2 +/-0.2 (stat) +/-1.9 (syst) +/- 0.4 (lumi) pb. Differential cross sections are measured as a function of the diphoton invariant mass, the diphoton transverse momentum, the azimuthal angle difference between the two photons, and the cosine of the polar angle in the Collins-Soper reference frame of the diphoton system. The results are compared to theoretical predictions at leading, next-to-leading, and next-to-next-to-leading order in quantum chromodynamics.

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A time reversal symmetric regularized electron exchange model was used to elastic scattering, target elastic Ps excitations and target inelastic excitation of hydrogen in a five state coupled model. A singlet Ps-H-S-wave resonance at 4.01 eV of width 0.15 eV and a P-wave resonance at 5.08 eV of width 0.004 eV were obtained using this model. The effect on the convergence of the coupled-channel scheme due to the inclusion of the excited Ps and H states was also analyzed.