A insidiosa corrosão dos sistemas de proteção social europeus

Um Mecanismo de Seleção de Pares Baseado no Tempo de Vida dos Participantes em Sistemas de Vı́deo Par-a-Par

In peer-to-peer video-on-demand systems, peers interact with the system stopping, jumping forward, and jumping back the video during its playback. Thus, each peer can be playing a given interval of the video and, consequently, the number of partners from which a peer can require video chunks varies and in some cases a few partners can be selected. In this paper, we propose a novel peer selectio...

Uma análise comparativa dos métodos de avaliação de sistemas colaborativos fundamentados na engenharia semiótica

Collaborative systems are growing more and more popular. However, evaluating this type of systems is still a difficult task. Many evaluation methods have been proposed to deal with this challenge, but most of them are not yet consolidated. Semiotic Engineering is an explanatory theory about HCI that proposes three different methods that can be applied to evaluate collaborative systems: MIS, MAC...

Metodologia Para Rastreamento Com Modificação Dos Zeros E Rejeição De Distúrbio Aplicada a Sistemas Incertos

The methodology for tracking system and disturbance rejection considering polytopic uncertainties in the plant is proposed in this work. The process of disturbance rejection is make though of the dynamic feedback of the system using a controller Kp(s) that minimize the H2-norm guaranteed cost from w(t) para z(t), where w(t) is the disturbance signal and z(t) is the output of the system. And so,...

Ciclo de Vida das Capacidades de Tecnologia da Informação na Trajetória dos Sistemas Integrados de uma Universidade Brasileira

Uma análise comparativa dos modelos de sistemas colaborativos fundamentados na engenharia semiótica

There are two models based on Semiotic Engineering aimed to assist designers in modeling the interface: Manas and MoLIC. This work shows the result of the application of these models in two collaborative systems and contrasts the results between models and within each model, assessing which aspects were represented by each model and in what level of abstraction, as well as the possibility of a ...