Enraizamento in vitro de brotações de Eucalyptus dunnii utilizando altas concentrações de auxinas.

bitstream/item/104310/1/48EnraizamentoInVitro0001.pd

General CMB and Primordial Bispectrum Estimation I: Mode Expansion, Map-Making and Measures of f_NL

We present a detailed implementation of two bispectrum estimation methods which can be applied to general non-separable primordial and CMB bispectra. The method exploits bispectrum mode decompositions on the domain of allowed wavenumber or multipole values. Concrete mode examples constructed from symmetrised tetrahedral polynomials are given, demonstrating rapid convergence for known bispectra. We use these modes to generate simulated CMB maps of high resolution (l > 2000) given an arbitrary primordial power spectrum and bispectrum or an arbitrary late-time CMB angular power spectrum and bispectrum. By extracting coefficients for the same separable basis functions from an observational map, we are able to present an efficient and general f_NL estimator for a given theoretical model. The estimator has two versions comparing theoretical and observed coefficients at either primordial or late times, thus encompassing a wider range of models, including secondary anisotropies, lensing and cosmic strings. We provide examples and validation of both f_NL estimation methods by direct comparison with simulations in a WMAP-realistic context. In addition, we show how the full bispectrum can be extracted from observational maps using these mode expansions, irrespective of the theoretical model under study. We also propose a universal definition of the bispectrum parameter F_NL for more consistent comparison between theoretical models. We obtain WMAP5 estimates of f_NL for the equilateral model from both our primordial and late-time estimators which are consistent with each other, as well as with results already published in the literature. These general bispectrum estimation methods should prove useful for the analysis of nonGaussianity in the Planck satellite data, as well as in other contexts.Comment: 41 pages, 17 figure

Avaliação do florescimento e do potencial de produção de sementes de Eucalyptus dunnii Maid. no Brasil.

O florescimento e o potencial para a produção de sementes foram avaliados em populações de Eucalyptus dunnii Maid., em idade prevista de florescimento, implantadas em 18 localidades do Brasil. Foram coletados parâmetros geográficos e climáticos das populações, bem como, para cada povoamento, as seguintes informações: área, natureza, idade, procedências e densidade. Para as árvores que se encontravam no estágio reprodutivo, determinaram-se a ontogenia, a localização e a intensidade de florescimento e/ou frutificação. A localização geográfica influenciou no florescimento. Houve uma tendência de maior florescimento para os locais de latitudes mais elevadas, com temperaturas médias do mês mais frio mais baixas. Devido às árvores das populações amostradas estarem ontogenicamente adultas, não se verificaram diferenças entre as idades, em relação ao florescimento. Da mesma forma, o florescimento não foi influenciado pela localização das árvores no povoamento. Entretanto, observou-se que, as árvores de povoamentos desbastados precocemente, floresceram mais do que aquelas de povoamentos desbastados tardiamente. Observou-se, ainda, que as árvores de bordadura apresentaram um florescimento maior do que aquelas situadas no interior dos povoamentos. Observações desses efeitos associados sugerem que a eliminação da competição pela luz é fator fundamental para o florescimento dessa espécie

Untangling the immune basis of disease susceptibility

© 2020 Copyright Ribeiro and Graca. This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are creditedInteractions between immune cell receptors and proteins that determine disease susceptibility shed light on how different arms of the immune system are involved in three viral infections and Crohn's disease.info:eu-repo/semantics/publishedVersio

Enraizamento de estacas de Eucalyptus dunnii Maiden.

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Dilepton distributions at backward rapidities

The dilepton production at backward rapidities in $pAu$ and $pp$ collisions at RHIC and LHC energies is investigated in the dipole approach. The results are shown through the nuclear modification ratio $R_{pA}$ considering transverse momentum and rapidity spectra. The dilepton modification ratio presents interesting behavior at the backward rapidities when compared with the already known forward ones, since it is related with the large $x$ kinematical region that is being probed. The rapidity dependence of the nuclear modification ratio in the dilepton production is strongly dependent on the Bjorken $x$ behavior of the nuclear structure function ratio $R_{F_{2}}=F_{2}^{A}/F_{2}^{p}$. The $R_{pA}$ transverse momentum dependence at backward rapidities is modified due to the large $x$ nuclear effects: at RHIC energies, for instance, the ratio $R_{pA}$ is reduced as $p_T$ increases, presenting an opposite behavior when compared with the forward one. It implies that the dilepton production at backward rapidities should carry information of the nuclear effects at large Bjorken $x$, as well as that it is useful to investigate the $p_T$ dependence of the observables in this kinematical regime.Comment: 15 pages, 6 figures. Version published in the Phys. Rev.

A Sturm-Liouville equation on the crossroads of continuous and discrete hypercomplex analysis

The paper studies discrete structural properties of polynomials that play an important role in the theory of spherical harmonics in any dimensions. These polynomials have their origin in the research on problems of harmonic analysis by means of generalized holomorphic (monogenic) functions of hypercomplex analysis. The Sturm-Liouville equation that occurs in this context supplements the knowledge about generalized Vietoris number sequences Vn, first encountered as a special sequence (corresponding to n=2) by Vietoris in connection with positivity of trigonometric sums. Using methods of the calculus of holonomic differential equations, we obtain a general recurrence relation for Vn, and we derive an exponential generating function of Vn expressed by Kummer's confluent hypergeometric function.This work was supported by Portuguese funds through the CMAT—Research Centre of Mathematics of University of Minho—and through the CIDMA-Center of Research and Development in Mathematics and Applications (University of Aveiro) and the Portuguese Foundation for Science and Technology (“FCT - Fundação para a Ciência e Tecnologia”), within projects UIDB/00013/2020, UIDP/00013/2020, UIDB/04106/2020 , and UIDP/04106/2020

Estaquia de erva-mate.

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