2,179 research outputs found

    Mastite bovina: causas e consequências na produção e qualidade do leite do gado mestiço da microrregião de Juiz de Fora - MG.

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    São apresentados, resumidamente, resultados de três experimentos visando ao controle da mastite bovina nas condições da Zona da Mata de Minas Gerais, componentes da programação de pesquisa do Centro Nacional de Pesquisa de Gado de Leite.bitstream/item/81870/1/Mastite-bovina.pd

    Local Anomalies, Local Equivariant Cohomology and the Variational Bicomplex

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    The locality conditions for the vanishing of local anomalies in field theory are shown to admit a geometrical interpretation in terms of local equivariant cohomology, thus providing a method to deal with the problem of locality in the geometrical approaches to the study of local anomalies based on the Atiyah-Singer index theorem. The local cohomology is shown to be related to the cohomology of jet bundles by means of the variational bicomplex theory. Using these results and the techniques for the computation of the cohomology of invariant variational bicomplexes in terms of relative Gel'fand-Fuks cohomology introduced in [6], we obtain necessary and sufficient conditions for the cancellation of local gravitational and mixed anomalies.Comment: 36 pages. The paper is divided in two part

    Cellular Basis of Phase 2 in Mouse Ventricular Action Potentials

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    Territory and solidarity: the European Union territorial cohesion policy and the role of local institutions

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    This paper analyses the evolution of the notion of territorial cohesion in the European Union, with an emphasis on the importance given to the processes of participation and to the specificities of local realities. Despite space and territory has always received attention from the economic theories of development, only recently the territorial dimension was considered fundamental by the European Union. Even though the European Rural Development Policy has always had a greater territorial focus than other European policies, the real relevance of participatory models and the involvement of local actors within this policy has been questioned and must be scrutinized. The reference to a Portuguese cooperative financial institution illustrates this assessment by providing evidence on the role that a local institution can play in rural development.FC

    Multiplicity fluctuations in the string clustering approach

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    We present our results on multiplicity fluctuations in the framework of the string clustering approach. We compare our results --with and without clustering formation-- with CERN SPS NA49 data. We find a non-monotonic behaviour of these fluctuations as a function of the collision centrality, which has the same origin as the observed fluctuations of transverse momentum: the correlations between the produced particles due to the cluster formation.Comment: 16 pages, 4 figures, revte

    Cartas al director

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    Heavy-ion Physics at a Fixed-Target Experiment Using the LHC Proton and Lead Beams (AFTER@LHC): Feasibility Studies for Quarkonium and Drell-Yan Production

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    We outline the case for heavy-ion-physics studies using the multi-TeV lead LHC beams in the fixed-target mode. After a brief contextual reminder, we detail the possible contributions of AFTER@LHC to heavy-ion physics with a specific emphasis on quarkonia. We then present performance simulations for a selection of observables. These show that Υ(nS)\Upsilon(nS), J/ψJ/\psi and ψ(2S)\psi(2S) production in heavy-ion collisions can be studied in new energy and rapidity domains with the LHCb and ALICE detectors. We also discuss the relevance to analyse the Drell-Yan pair production in asymmetric nucleus-nucleus collisions to study the factorisation of the nuclear modification of partonic densities and of further quarkonia to restore their status of golden probes of the quark-gluon plasma formation.Comment: 18 pages, 7 figure
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