A study was carried out in Canela, RS, including the application of instruments which evaluated the characteristics of the receiving region, the tourist profile, Canela s National Forest evaluation by the tourists the ...

This study was conducted at an experimental area at Aroeira Farm, belonging to Votorantim Celulose e Papel company, under the geographic coordinates 31° 45 50.7 S e 53° 50 34.9 W, located in Candiota county. In the ...

The Tectona grandis Linn F. was introduced in Mato Grosso in the end of the sixties and new planting is made each year in the State with the aim of replacing native woods of noble use. Beyond the expectation of great future ...

This Ph.D. Dissertation presents contributions to the study of hybrid multilevel systems, analyzing several issues that compose this system, such as: topological variations of the output inverter stage and input rectifier ...

The distribution system is an extremely important part of the energy supply. At the same time, distribution networks, most of them with radial configuration, are much more vulnerable elements compared with transmission and ...

This Thesis presents a distributed generation system, which works as a Microgrid, suitable to integrate alternative energy sources, using a high frequency AC link (HFAC) as a means of connecting sources and loads. The ...

The proposed work aimed to investigate the entomological aspects in homogeneous stands of Acacia mearnsii (black wattle). It was considered: insects identification and damage quantification on seeds; treatment effect of ...

In the last decade, disturbances in the electrical system have been increased, mainly due to proliferation of nonlinear loads. As a result harmonic distortion, voltage unbalance and frequency variations are becoming a ...

The present doctoral thesis concentrate efforts in the consolidation of the benefits introduced by the plug-in repetitive action in the performance of pulse-width modulated voltage source inverters. The work is focused in ...

This work presents the study on a linear ultrasonic motor with tubular geometry for linear displacements. Similar topologies, reported elsewhere, are conceived for producing rotary motions. Due to some particular characteristics ...