The identification of physical close galaxy pairs

A classification scheme for close pairs of galaxies is proposed. The scheme is motivated by the fact that the majority of apparent close pairs are in fact wide pairs in three-dimensional space. This is demonstrated by means of numerical simulations of random samples of binary galaxies and the scrutiny of the resulting projected and spatial separation distributions. Observational strategies for classifying close pairs according to the scheme are suggested. As a result, physical (i.e., bound and spatially) close pairs are identified.Comment: 16 pages, 5 figures, accepted for publication in The Astronomical Journal, added text corrections on proof

Drop deformation in stokes flow through converging channels

This work presents an application of a direct BEM formulation for drop deformation and interaction in Stokes flows through converging channels. Parametric studies are conducted to investigate the effect, on drop deformation, of the channel’s convergence ratio, the drop-fluid viscosity ratio, the interfacial tension and the initial relative position of the drops

Projeto valoriza bioma cerrado.

Os objetivos almejados foram propor sistemas agroflorestais agroecológicos temáticos; alternativas econômicas e sociais viáveis e participativas e de recuperação de áreas degradadas com espécies nativas e potencialmente utilizáveis para exploração econômica e sustentável. Estudar e desenvolver conhecimento ecológico, bioquímico e molecular e o manejo fitotécnico de espécies nativas componentes do sistema agroflorestal e desenvolver estudos fisiológicos, bioquímicos, ecológicos, econômicos e sociais. E também promover a educação ambiental participativa de crianças, jovens e adultos.bitstream/item/46248/1/projetobc.pd