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A Bacia Lusitaniana : estratigrafia, paleogeografia e tectónica

The national inventory of geosites in Portugal

During the last three years geoscientists of various institutions have developed a project aiming the setup of a geoconservation strategy in Portugal (Brilha, 2009). One of the main goals of the project was the establishment of an inventory of the most important Portuguese geosites, under the scientific point of view. In a near future, national authorities will consider this inventory as a technical support for...

Somatotype and body composition in portuguese youth soccer players

An Application of Hough Transform to Identify Breast Cancer in Images

The present work focus on the identification of malignant neoplasias in breast by using the Hough Transform in digital images. A detector of circumference was implemented based on the Hough Transform once the pattern to identify is circular. The detector presented here was developed using MatLab, and was applied to detect circumferences in tomography images.

Is polaron effect important for resonant Raman scattering in self-assembled qua...

While the diagonal (or intra-level) interaction of a confined exciton with optical phonons in selfassembled quantum dots (SAQD’s) is rather weak, the non-diagonal one can lead to a considerable change of the exciton spectrum and the formation of a polaron. An impact of this effect on resonant inelastic light scattering is studied theoretically. The polaron spectrum is obtained by numerical diagonalisation of th...

Polaron effect on Raman scattering in semiconductor quantum dots

Strong coupling of a confined exciton to optical phonons in semiconductor quantum dots (QDs) leading to the formation of a polaron is considered for a model system including two lowest exciton states and several optical phonon modes. Both intra- and inter-level terms are taken into account. The Hamiltonian has been exactly diagonalized including a finite number of phonons allowed for each mode, large enough to ...

Mixed optical phonon modes in semiconductor nanocrystals synthesized in porous ...

This work is devoted to experimental and theoretical studies of optical phonons confined in CdS nanocrystals grown inside a porous alumina matrix. The complete sets of phonon modes, confined in a spherical quantum dot and in a cylindrical quantum wire, are considered in the framework of a continuum model, which allows the mixing of all the expected types of vibrations. It is shown that the calculated phonon-rel...

Finite-size scaling study of the ballistic deposition model in (1+1)-dimensions

We performed extensive Monte Carlo simulations of the ballistic deposition model in (1 + 1)-dimensions for several system sizes up to 1280 lattice constants, on the square lattice. Though the ballistic deposition model is generally accepted to belong to the Kardar Parisi-Zhang (KPZ) universality class, strong corrections to scaling prevent numerical estimates of the exponents close to the asymptotic values. We ...

Estudo comparativo entre número de perfilhos no cultivo da pupunheira sem espin...

Dois diferentes numeros de perfilhos de pupunheira foram estudados para producao de palmito nas condicoes edafoclimaticas do municio de Rio Preto da Eva (AM). O Espacamento utilizado foi de 2,5m x 1m, deixando-se dois perfilhos por cova. O que apresentou melhores resultados foi de dois perfilhos/cova, que produziu 713kg/ha/ano de palmito comestivel de primeira (tambem denominado creme), dos quais foram aproveit...

Territórios multifuncionais em patologia humana