R4F Tecnologia (Brazil)

Propósito – O principal objetivo é analisar a atuação da ICANN, uma entidade privada sem fins lucrativos, que exerce papel regulatório, sob a luz de uma teoria específica da regulação.
 Metodologia/abordagem/design – A metodologia inclui a análise do material publicado pela ICANN durante o programa de expansão do gTLD, em especial sobre o nome de domínio “.amazon”.
 Resultados – O artigo demonstra a possibilidade de analisar as atividades da ICANN sob a perspectiva da teoria processual administrativa da regulação.
 Originalidade/relevância do texto – O artigo inova na análise de uma entidade privada – apesar de seus vínculos com o governo norte-americano – a partir da teoria processual administrativa da regulação.

We treat surface-acoustic wave (SAW) devices as an arbitrary multielement system. To describe it, a modified form of the chain matrix (E-matrix) is introduced. The E-matrix has a property of turning the calculation of the transfer matrix of this system into a simple multiplication procedure. This allows one to perform computation of electrical response of almost any type of SAW device since the total transfer matrix could be reduced to a Y-matrix. Examples and simulation results confirming the method described are shown.

The key discriminatory agent for competition among the public telecommunication operating companies lies in the technological innovation in network evolution and the diverse offered services. The generation of innovation by means of technological research and development has now been concentrated on the operating companies in contrast with yesterday's approach when technology generation was strongly in the hands of the industries. In this paper the TELEBRAS Research and Development Center offers its experience in technological innovation in the area of telecommunications by reporting the transformation taking place in its operational approach born from the changes in the scenarios of the governmental and entrepreneurial policies.

We investigate δ-doped GaAs samples grown by molecular-beam epitaxy with different silicon areal concentration and cap layer thickness, using photoreflectance spectroscopy. The features observed on the high-energy side of the fundamental gap are attributed to transitions involving electronic sub-bands in the δ-doped potential well that take into account the diffusion of the dopants.

Al desarrollo obtenido por las telecomunicaciones en Brasil, desde los anos setenta, despues de decadas de virtual paralizacion, se refiere Marsiaj en este ensayo. Senala que el sistema Telebras, tiene como mision empresarial el proporcionar a la sociedad brasilena servicios de telecomunicaciones adecuados a las necesidades de su desarrollo politico y economico y su bienestar social.