Running Gluon Mass from Landau Gauge Lattice QCD Propagator

The interpretation of the Landau gauge lattice gluon propagator as a massive type bosonic propagator is investigated. Three different scenarios are discussed: i) an infrared constant gluon mass; ii) an ultraviolet constant gluon mass; iii) a momentum dependent mass. We find that the infrared data can be associated with a massive propagator up to momenta $\sim 500$ MeV, with a constant gluon mass of 723(11) MeV, if one excludes the zero momentum gluon propagator from the analysis, or 648(7) MeV, if the zero momentum gluon propagator is included in the data sets. The ultraviolet lattice data is not compatible with a massive type propagator with a constant mass. The scenario of a momentum dependent gluon mass gives a decreasing mass with the momentum, which vanishes in the deep ultraviolet region. Furthermore, we show that the functional forms used to describe the decoupling like solution of the Dyson-Schwinger equations are compatible with the lattice data with similar mass scales.Comment: Version to appear in J. Phys. G. New version include some rewriting and new analysis. In particular, the section on the running mass is ne

Regeneration in felling gaps during the first two years after logging in Acre state, West Amazon.

This paper studies the regeneration in felling gaps during the first two years after logging in Acre state, West Amazon

Sustainable forest management for small farmers in Acre state in the Brazilian Amazon.

This paper has the aim of presenting a forest management system to be applied on small farms, especially in the settlement projects of the Brazilian Amazon

Forest growth dynamics of managed forests in the Southwestern Brazilian Amazon.

The objective of this work was to present the growth forest dynamics results obtained in two sites located in Acre and Amazonas states in the southwestern Brazilian Amazon.Abstracts of the XXV IUFRO World Congress

Estudo da dinâmica da floresta manejada no projeto de manejo florestal comunitário do PC Pedro Peixoto na Amazônia Ocidental.

Neste trabalho são apresentados resultados do estudo da dinâmica da floresta em um sistema de manejo florestal voltado para a pequena propriedade. O sistema prescreve ciclo de corte de 10 anos e taxa de corte de 10 m3.ha-1 e tração animal para o arraste. O crescimento da floresta de 1 m3.ha-1.ano-1 foi compatível com o ciclo e taxa de corte adotados. Os danos causados pela exploração representaram 5 % da área basal total, e a taxa de mortalidade quatro anos após a exploração foi 3,2 %

Roteiro dos participantes do curso: Custo de produção de café e leite.

Esta publicação é resultado de um trabalho de elaboração de curso de capacitação para agentes dinamizadores do desenvolvimento do território Vale do Jamari. A Secretaria de Desenvolvimento Territorial (SDT) estabeleceu dentre as diretrizes para a implantação do Programa de Desenvolvimento Territorial, promover a aquisição de capacidades, o desenvolvimento de capital social e a participação das populações territoriais, de modo a apoiar o processo de construção e implementação de planos territoriais de desenvolvimento. Nesse contexto, o objetivo do curso de Custo de produção de Café e Leite foi capacitar os agentes dinamizadores do desenvolvimento do território Vale do Jamari para atuarem como multiplicadores dos procedimentos de levantamento de custos de produção de café e leite.bitstream/CPAF-RO-2010/14323/1/doc110-curso-custodeproducaocafeeleite.pd

Scaling Invariance in a Time-Dependent Elliptical Billiard

We study some dynamical properties of a classical time-dependent elliptical billiard. We consider periodically moving boundary and collisions between the particle and the boundary are assumed to be elastic. Our results confirm that although the static elliptical billiard is an integrable system, after to introduce time-dependent perturbation on the boundary the unlimited energy growth is observed. The behaviour of the average velocity is described using scaling arguments

Reduction of damage to tropical moist forest through planned harvesting.

The damage occasioned by harvesting in a planned manner is assessed. The main features of the approach to damage reduction were: previous surveying and careful construction of roads and skidding trails, climber cutting and directional felling. Harvested volume was 20m3 ha-1. The number of damaged trees over 10cm diameter was 5.3 pper tree logged and the volume of damage was 0.27m3 per cubic meter extracted. Damage caused to the canopy by road and trail cutting, provision of landings and felling damage amounted to a maximum canopy opening of 15%

Ising Ferromagnet: Zero-Temperature Dynamic Evolution

The dynamic evolution at zero temperature of a uniform Ising ferromagnet on a square lattice is followed by Monte Carlo computer simulations. The system always eventually reaches a final, absorbing state, which sometimes coincides with a ground state (all spins parallel), and sometimes does not (parallel stripes of spins up and down). We initiate here the numerical study of ``Chaotic Time Dependence'' (CTD) by seeing how much information about the final state is predictable from the randomly generated quenched initial state. CTD was originally proposed to explain how nonequilibrium spin glasses could manifest equilibrium pure state structure, but in simpler systems such as homogeneous ferromagnets it is closely related to long-term predictability and our results suggest that CTD might indeed occur in the infinite volume limit.Comment: 14 pages, Latex with 8 EPS figure