Structural Flyby Characterization of Nanoporosity

Recently, Ferreira da Silva et al. [3] have performed a gradient pattern analysis of a canonical sample set (CSS) of scanning force microscopy (SFM) images of p-Si. They applied the so-called Gradient Pattern Analysis to images of three typical p-Si samples distinguished by different absorption energy levels and aspect ratios. Taking into account the measures of spatial asymmetric fluctuations they interpreted the global porosity not only in terms of the amount of roughness, but rather in terms of the structural complexity (e.g., walls and fine structures as slots). This analysis has been adapted in order to operate in a OpenGL flyby environment (the StrFB code), whose application give the numerical characterization of the structure during the flyby real time. Using this analysis we compare the levels of asymmetric fragmentation of active porosity related to different materials as p-Si and "porous diamond-like" carbon. In summary we have shown that the gradient pattern analysis technique in a flyby environment is a reliable sensitive method to investigate, qualitatively and quantitatively, the complex morphology of active nanostructures

Eccentric geophysical-observatory satellite S-49 with interpretation of the radio- beacon experiment Technical report no. 1

Evaluation of radio beacon data from satellite observation of earth exosphere - data scaling technique

Dark matter spikes in the vicinity of Kerr black holes

The growth of a massive black hole will steepen the cold dark matter density at the center of a galaxy into a dense spike, enhancing the prospects for indirect detection. We study the impact of black hole spin on the density profile using the exact Kerr geometry of the black whole in a fully relativistic adiabatic growth framework. We find that, despite the transfer of angular momentum from the hole to the halo, rotation increases significantly the dark matter density close to the black hole. The gravitational effects are still dominated by the black hole within its influence radius, but the larger dark matter annihilation fluxes might be relevant for indirect detection estimates.Comment: Published version plus corrected typo in Fig 1

Numerical methods for computing Casimir interactions

We review several different approaches for computing Casimir forces and related fluctuation-induced interactions between bodies of arbitrary shapes and materials. The relationships between this problem and well known computational techniques from classical electromagnetism are emphasized. We also review the basic principles of standard computational methods, categorizing them according to three criteria---choice of problem, basis, and solution technique---that can be used to classify proposals for the Casimir problem as well. In this way, mature classical methods can be exploited to model Casimir physics, with a few important modifications.Comment: 46 pages, 142 references, 5 figures. To appear in upcoming Lecture Notes in Physics book on Casimir Physic

Protonospheric electron concentration profiles Final report

Protonospheric electron concentration profiles based on Doppler and Faraday effect

Perfilhamento e produção de massa de forragem de capins urochloa spp submetidos a duas alturas de manejo

TCC (graduação)- Universidade Federal de Santa Catarina. Campus Curitibanos. Agronomia.No Brasil a bovinocultura de corte e de leite são de estrema importância para o setor econômico do país, a base de alimentação deste rebanho são as pastagens, a área coberta por pastagens é de aproximadamente 180 milhões de hectares e desse total praticamente 80% são cultivadas por espécies do gênero Urochloa ssp. O presente trabalho objetivou avaliar a produção de perfilhos e de massa de forragem (MS) de capins Urochloa spp (Urochloa brizantha cv. Marandu e Urochloa ruziziensis cv. Ruziziensis) submetidos a duas alturas de corte (20 e 30 cm) e crescimento livre. O trabalho foi realizado com intuito de saber se as Urochloa spp poderiam servir de pastagem alternativa para bovinos na região de Curitibanos SC durante o verão. O experimento foi implantado na Fazenda Agropecuária da Universidade Federal de Santa Catarina, no município de Curitibanos-SC, onde o clima do local é classificado como temperado, mesotérmico úmido e verão ameno e o solo é classificado como Cambissolo Háplico de textura argilosa (550 g.kg-1 de argila). O experimento foi analisado em parcelas subdivididas no tempo, com seis tratamentos e três repetições em delineamento inteiramente casualizado totalizando em 18 parcelas. Quem apresentou resultados superiores, foi a cv. Ruziziensis que produziu média de 746,518 perfilhos/m2 e 10890,890 kg/ha-1 de MS. O melhor manejo de altura para produção de perfilhos é o de 20 cm que produziram média de 832,888 perfilhos/m2. A maior produção de MS ocorreu no manejo de 30 cm de altura que produziu 6429,495 kg/ha-1 de média. O mês de avaliação com maior produção de perfilhos e MS foi o mês de fevereiro, produzindo media de 785,555 perfilhos/m2 e 11409,190 kg/ha-1 de MS. Portanto as duas cultivar de Urochloa spp podem ser uma boa alternativa de pastagens para os produtores da região de curitibanos durante o verão, pois apresentam características produtivas semelhantes ao local de origem. Sendo que a cv. Ruziziensis é mais produtiva que a cv. Marandu.In Brazil, cutting cattle and milk are of extreme importance for the economic sector of the country, this flock power base are the pastures, the area covered by pasture is approximately 180 million hectares and nearly 80% of this total are grown by species of the genus Urochloa ssp. This study aimed to evaluate the production of tillers and herbage mass (MS) of grasses Urochloa spp (Urochloa brizantha cv. Marandu and Urochloa ruziziensis cv. Ruziziensis) submitted to two cutting heights (20 and 30 cm) and free growth. The work was performed in order to know if the Urochloa spp could serve as an alternative for cattle pasture in Curitibanos SC region during the summer. The experiment was established in the Treasury Agricultural Federal University of Santa Catarina, in the municipality of Curitibanos-SC, where the local climate is classified as temperate, humid mesothermal and mild summer and the soil is classified as Cambisol clayey (550 g .kg-1 clay). The experiment was analyzed in split plot, with six treatments and three replicates in a randomized design totaling 18 installments. Who showed superior results was cv. Ruziziensis which produced an average of 746.518 tillers / m2 and 10,890.890 kg / ha-1 MS. The better time management for production tiller is 20 cm which produced an average of 832.888 tillers / m2. The greater MS occurred in the management of 30 cm which produced 6429.495 kg / ha-1 medium. The month of evaluation with greater production of tillers and MS was the month of February, producing average of 785.555 tillers / m2 and 11,409.190 kg / ha-1 MS. So the two cultivar Urochloa spp can be a good alternative pastures for producers of Curitiba region during the summer, since they have production characteristics similar to the original location. Since the cv. Ruziziensis is more productive than the cv. Marandu