Potencialidades das rochas graníticas no concelho de Nisa

O presente texto visa dar a conhecer os resultados obtidos a respeito das potencialidades das rochas graníticas existentes na área do município. Estes resultados foram obtidos no âmbito de um trabalho mais vasto de inventariação, caracterização e avaliação das potencialidades em recursos minerais do concelho de Nisa, o qual foi objecto de um protocolo de colaboração com carácter pioneiro entre a autarquia e o LNEG

Relevance of pseudospin symmetry in proton-nucleus scattering

The manifestation of pseudospin-symmetry in proton-nucleus scattering is discussed. Constraints on the pseudospin-symmetry violating scattering amplitude are given which require as input cross section and polarization data, but no measurements of the spin rotation function. Application of these constraints to p-58Ni and p-208Pb scattering data in the laboratory energy range of 200 MeV to 800 MeV, reveals a significant violation of the symmetry at lower energies and a weak one at higher energies. Using a schematic model within the Dirac phenomenology, the role of the Coulomb potential in proton-nucleus scattering with regard to pseudospin symmetry is studied. Our results indicate that the existence of pseudospin-symmetry in proton-nucleus scattering is questionable in the whole energy region considered and that the violation of this symmetry stems from the long range nature of the Coulomb interaction.Comment: 22 pages including 9 figures, correction of 1 reference, revision of abstract and major modification of chapter 4, Fig. 6, and Fig. 7; addition of Fig. 8 and Fig.

Resposta a NPK por seringueiras em viveiros nas condicoes do estado de Rondonia.

Procurou-se verificar as resposta a adubacao e definir niveis mais adequados nitrogenio, fosforo e potassio para viveiros de seringueira em Rondonia. Os experimentos foram instalados em alguns solos representativos nos municipios de Porto Velho e Ariquemes: Latossolo Amarelo textura pesada; Ouro Preto D'Oeste: Podzolicos. Os delineamentos foram do tipo fatorial incompleto em blocos ao acaso, com tres repeticoes. Utilizou-se: ureia com 45% de N, superfosfato triplo com 46% de P2O5 e cloreto de potassio com 60% de K2O.Mediu-se o diametro do caule a 5cm do solo consideradosos diametros de 1,2cm para plantas de 7 meses e de 2cm para plantas de 12 meses de idade no calculo da porcentagem de plantas aptas a enxertia. Resultados demonstram que nao ha resposta significativa a adubacao de ate 90kg de N, 250kg P2O5 e 120kg K2O/ha. O manejo adequado da materia organica, calagem e adubacao de testituicao, deverao ser praticas observadas para a garantia da producao de viveiros de seringueira. Sugere-se que enquanto nao se tem determinacao segura de teores exportados palas plantas em diversos locais do Estado, a aplicacao de 1,0g de P2O5 e K2O por planta deve ser suficiente para a produçãobitstream/item/23946/1/11-jul88.pd

The "Alpalhão Granite" (Alentejo, Portugal) as a potential ornamental stone

“Alpalhão granite”, also called SPI, is used as a high quality ornamental stone for interior and exterior applications. It is fine grained and equigranular, and has disseminated feldspar phenocrysts showing a homogeneous bluish grey colour. The SPI was mapped and scanlines (14) and drill cores (4) were carried out for lithofacies and joints characterization, besides petrographical study. Three of the 5 granite outcrops were studied regarding their potential for ornamental blocks exploitation (Carvalhal, Pinheiral and Ribeira de Sor). The Carvalhal area has generally no potential, due to intense fracturing and frequent heterogeneities except for drill core SCA1 area. The Pinheiral area has been exploited in all its extent, but still assures 368,800m3 estimated resources of good granite at depth. Ribeira de Sor area presents a good potentiality for commercial blocks in the eastern zone and a limited potential in the western area due to subsurface fracturing and chromatic changes.</jats:p

Supervised wavelet method to predict patient survival from gene expression data.

In microarray studies, the number of samples is relatively small compared to the number of genes per sample. An important aspect of microarray studies is the prediction of patient survival based on their gene expression profile. This naturally calls for the use of a dimension reduction procedure together with the survival prediction model. In this study, a new method based on combining wavelet approximation coefficients and Cox regression was presented. The proposed method was compared with supervised principal component and supervised partial least squares methods. The different fitted Cox models based on supervised wavelet approximation coefficients, the top number of supervised principal components, and partial least squares components were applied to the data. The results showed that the prediction performance of the Cox model based on supervised wavelet feature extraction was superior to the supervised principal components and partial least squares components. The results suggested the possibility of developing new tools based on wavelets for the dimensionally reduction of microarray data sets in the context of survival analysis

Associação da seringueira com a cultura do café, no município de Ouro Preto D'Oeste em Rondônia.

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