Localização de espécies florestais nativas em fragmentos da Floresta Ombrófila Mista no território centro-sul do Paraná.

EVINCI. Resumo

Wilson Fermions and Axion Electrodynamics in Optical Lattices

The formulation of massless relativistic fermions in lattice gauge theories is hampered by the fundamental problem of species doubling, namely, the rise of spurious fermions modifying the underlying physics. A suitable tailoring of the fermion masses prevents such abundance of species, and leads to the so-called Wilson fermions. Here we show that ultracold atoms provide us with the first controllable realization of these paradigmatic fermions, thus generating a quantum simulator of fermionic lattice gauge theories. We describe a novel scheme that exploits laser-assisted tunneling in a cubic optical superlattice to design the Wilson fermion masses. The high versatility of this proposal allows us to explore a variety of interesting phases in three-dimensional topological insulators, and to test the remarkable predictions of axion electrodynamics.Comment: RevTex4 file, color figures, slightly longer than the published versio

Estudo da fenologia reprodutiva da guabiroba (Campomanesia Xanthocarpa Berg.) na floresta nacional de Irati.

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Elaboração de um mapa índice e um sistema de informação geográfica das espécies de interesse.

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Fenologia reprodutiva de Maytenus ilicifolia (Celastraceae) na Floresta Nacional de Irati, Paraná, Brasil.

(Reproductive phenology of Maytenus ilicifolia (Celastraceae) in the Irati National Forest, Paraná, Brazil). The present study investigates the reproductive phenology of a natural population of Maytenus ilicifolia Mart. ex Reissek from the Mixed Ombrophylous Forest (Araucaria Forest). The phenological study was carried out from April 2003 to March 2005, on 78 adult trees. The intensity of phenological events was estimated based on the scale of Fournier. The population showed seasonal behavior. A significant correlation was observed between temperature, day length and flowering. Two floral types were identified, one pistillate and the other staminate, and together with the phenology patterns results a dioecious characteristic for the species is suggested

O uso e o potencial da pitanga (Eugenia uniflora L.).

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