Gravitational Collapse of Massless Scalar Field with Negative Cosmological Constant in (2+1) Dimensions

The 2+1-dimensional geodesic circularly symmetric solutions of Einstein-massless-scalar field equations with negative cosmological constant are found and their local and global properties are studied. It is found that one of them represents gravitational collapse where black holes are always formed.Comment: no figure

Perturbed Self-Similar Massless Scalar Field in the Spacetimes with Circular Symmetry in 2+1 Gravity

We present in this work the study of the linear perturbations of the 2+1-dimensional circularly symmetric solution, obtained in a previous work, with kinematic self-similarity of the second kind. We have obtained an exact solution for the perturbation equations and the possible perturbation modes. We have shown that the background solution is a stable solution.Comment: no figure

Evaluation of de novo RNA-Seq assemblers in differential expression experiments.

The objective of this study is to evaluate methodologies applied on de novo transcriptomics studies, proposing criteria for ranking the data, in order to maximize the chance of correctly identifying a differentially expressed transcript.X-meeting 2015

OPTIMIZATION APPLIED TO ENERGY EFFICIENCY AND THERMAL COMFORT OF BUILDINGS: BIBLIOMETRIC ANALYSIS ON TECHNIQUES AND APPLICATIONS

The world's energy demand has raised concerns about supply difficulties, depletion of natural resources and environmental impacts such as destruction of ozone layer, global warming, climate change, among others. Recent studies indicate that energy consumption in buildings represents more than 40% of the world's energy consumption, with more than half of that attributed to air conditioning systems. Specific regulations and control strategies for heating, ventilation and air-conditioning (HVAC) systems should provide acceptable thermal comfort and reasonable indoor air quality. The evolution of researches in these areas can be evaluated by the organization of scientific production up to now. The objective of this study is to analyze quantitatively what was produced in terms of optimization associated to both energy savings and thermal comfort in buildings. This bibliometric analysis, based on Science Direct and IEEE Xplore databases, correlates common adopted terms to quantify how optimization, especially those associated to computational intelligence, are influencing building projects where thermal comfort and energy saving are taken into account. This research assumes a sample of 76 articles, and provided a statistical evaluation considering authors identification, and both articles and journals that were more cited by researchers in this area

Spin-orbit mode transfer via a classical analog of quantum teleportation

We translate the quantum teleportation protocol into a sequence of coherent operations involving three degrees of freedom of a classical laser beam. The protocol, which we demonstrate experimentally, transfers the polarisation state of the input beam to the transverse mode of the output beam. The role of quantum entanglement is played by a non-separable mode describing the path and transverse degrees of freedom. Our protocol illustrates the possibility of new optical applications based on this intriguing classical analogue of quantum entanglement.Comment: 5 pages, 7 figure

Implementação e modelagem do MyReview para administração web do 2° Simpósio de Geotecnologia no Pantanal.

A realização do 2° Simpósio de Geotecnologia no Pantanal [1] gera uma grande quantidade de informações a serem armazenadas e administradas, como por exemplo: nome dos artigos, nome dos autores, nome das instituições, nome das cidades, nome dos estados, resumindo o perfil completo dos participantes. A criação de ambiente Web ou uma ferramenta computacional, foi a solução que continha flexibilidade para administrar os dados e arquivos relacionados ao projeto.Poster. Trabalho apresentado na V Mostra de Trabalhos de Estagiários e Bolsistas, Campinas, out. 2009

Reclassificação de polígonos no formato vetorial.

O processo de reclassificação (agregação ou desagregação) é necessário quando se quer gerar um novo mapa a partir de um já existente. Aqui não se trata de dados na forma matricial, mas de dados vetoriais exigidos para elaboração de mapas temáticos com certa precisão cartográfica, onde os contornos precisam possuir a foram de linha. Sendo assim o objetivo deste trabalho é desenvolver uma aplicação que possibilite a reclassificação de polígonos (classe temáticas) em outros mapas vetoriais