Rafael Rosa da Rocha

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
Software project management (SPM) has increasingly become an essential task in many organizations, especially with the increase in size, complexity of current software systems. However, software projects often change during development time and there is a lack of models and supporting tools to support the SPM process, especially when it comes to simulations(More)
—This paper presents a universal active filter for harmonic and reactive power compensation for single-phase systems applications. The proposed system is a combination of parallel and series active filters without transformer. It is suitable for applications where size and weight are critical factors. The model of the system is derived and it is shown that(More)
Strong, extensive magnetic fringe fields are a significant problem with magnetic resonance imaging magnets. This is particularly acute with 4-T, whole-body research magnets. To date this problem has been addressed by restricting an extensive zone around the unshielded magnet or by placing external unsaturated iron shielding around the magnet. This paper(More)
Resumo— O uso de antenas direcionais em redes IEEE 802.11 pode aumentar a capacidade agregada da rede. Esta tecnologia possibilita a reutilização do espaço, aumentando o n ´ umero de comunicações simultâneas em uma rede. Este artigo identifica um problema, a " surdez intrínseca " , na utilização de ante-nas direcionais em redes IEEE 802.11 no modo ad hoc em(More)
  • 1