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Sistema de Visão Para Robots Móveis: o Caso do Robot CharrUA
Alexandre Santos; Pedro Leite; Ricardo Marau; Ana Sargento; José Luís Azevedo; Bernardo Cunha; Pedro Fonseca; Luís AlmeidaIn this paper we describe a robot that has been developed to participate in the Portuguese Robotics National Contest - ROBÓTICA 2003 – Festival Nacional de Robótica, with a particular emphasis on the vision system.This work stands out as the current top evolutionary phase of a continuous effort in the area of mobile robotics that has been carried out by the DET since...
Temporal behavior of Ethernet communications: Impact of the operating system an...
Pedro Silva; Luis Almeida; Mário de Sousa; Ricardo MarauEthernet is currently the most widely used networking technology, spanning across many application domains including embedded systems. In this particular case, Ethernet is even used in many time-critical applications in which the delay induced by communication must be short and bounded. It is thus very important to understand the entire transmission process and assess its temporal behavior. There are a number o...
Implementing Server-Based Communication within Ethernet Switches
Rui Santos; Alexandre Vieira; Ricardo Marau; Paulo Pedreiras; Arnaldo Oliveira; Luis Almeida; Thomas NolteReal-Time Ethernet (RTE) protocols have difficulties in attaining a bandwidth efficient support of aperiodic message streams in scenarios where strict timeliness requirements have to be met. To overcome such difficulties, the authors proposed recently the Server-SE protocol that deploys server-based traffic scheduling over switched Ethernet using the FTT-SE protocol and COTS switches as platform. This paper ext...
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