Simplicial minisuperspace models in the presence of a massive scalar field with arbitrary scalar coupling

We extend previous simplicial minisuperspace models to account for arbitrary scalar coupling \eta R\phi^2.Comment: 24 pages and 9 figures. Accepted for publication by Classical and Quantum Gravit

Anisotropic simplicial minisuperspace model

The computation of the simplicial minisuperspace wavefunction in the case of anisotropic universes with a scalar matter field predicts the existence of a large classical Lorentzian universe like our own at late timesComment: 19 pages, Latex, 6 figure

On the Nonrelativistic Limit of the phi^4 Theory in 2+1 Dimensions

We study the nonrelativistic limit of the quantum theory of a real scalar field with quartic self-interaction. The two body scattering amplitude is written in such way as to separate the contributions of high and low energy intermediary states. From this result and the two loop computation of the self energy correction, we determine an effective nonrelativistic action.Comment: 15 pages, 2 figures, revte

Avanços tecnol6gicos e processos voltados para produção agricola e preservação ambiental.

bitstream/item/58254/1/6-avancos-tecnolog-Centeno-2011.pd

Régua para medir profundidade da lâmina de água na lavoura de arroz.

bitstream/item/32591/1/Regua.para.medir.profundidade.pd

Ricecheck: sistema australiano de extensão rural estudo de caso.

bitstream/item/30350/1/boletim-49.pd