3,476 research outputs found

    ProduĆ§Ć£o integrada de manga: manejo pĆ³s-colheita e rastreabilidade.

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    CritƩrios para colheita; Rastreabilidade.bitstream/CPATSA-2009-09/40395/1/CTE89.pd

    Local roughness exponent in the nonlinear molecular-beam-epitaxy universality class in one-dimension

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    We report local roughness exponents, Ī±loc\alpha_{\text{loc}}, for three interface growth models in one dimension which are believed to belong the non-linear molecular-beam-epitaxy (nMBE) universality class represented by the Villain-Lais-Das Sarma (VLDS) stochastic equation. We applied an optimum detrended fluctuation analysis (ODFA) [Luis et al., Phys. Rev. E 95, 042801 (2017)] and compared the outcomes with standard detrending methods. We observe in all investigated models that ODFA outperforms the standard methods providing exponents in the narrow interval Ī±locāˆˆ[0.96,0.98]\alpha_{\text{loc}}\in[0.96,0.98] consistent with renormalization group predictions for the VLDS equation. In particular, these exponent values are calculated for the Clarke-Vvdensky and Das Sarma-Tamborenea models characterized by very strong corrections to the scaling, for which large deviations of these values had been reported. Our results strongly support the absence of anomalous scaling in the nMBE universality class and the existence of corrections in the form Ī±loc=1āˆ’Ļµ\alpha_{\text{loc}}=1-\epsilon of the one-loop renormalization group analysis of the VLDS equation

    Avaliacao da qualidade dos frutos de quatro acessos de tamareiras (Phoenix dactylifera L.) do BAG da Embrapa Semi-Arido.

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    O objetivo do presente trabalho foi a avaliaĆ§Ć£o da qualidade comercial dos frutos de quatro acessos do BAG da Embrapa Semi-Ɓrido

    Experimental Observation of Quantum Correlations in Modular Variables

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    We experimentally detect entanglement in modular position and momentum variables of photon pairs which have passed through DD-slit apertures. We first employ an entanglement criteria recently proposed in [Phys. Rev. Lett. {\bf 106}, 210501 (2011)], using variances of the modular variables. We then propose an entanglement witness for modular variables based on the Shannon entropy, and test it experimentally. Finally, we derive criteria for Einstein-Podolsky-Rosen-Steering correlations using variances and entropy functions. In both cases, the entropic criteria are more successful at identifying quantum correlations in our data.Comment: 7 pages, 4 figures, comments welcom

    Holonomy Transformation in the FRW Metric

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    In this work we investigate loop variables in Friedman-Robertson-Walker spacetime. We analyze the parallel transport of vectors and spinors in several paths in this spacetime in order to classify its global properties. The band holonomy invariance is analysed in this background.Comment: 8 page
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