O facto de grande percentagem da energia consumida derivar de recursos naturais não renováveis, cuja exploração e produção tem grandes impactos económicos e ambientais, despertou a consciência global da necessidade de procurar soluções que permitam um uso racional da energia, a optimização da eficiência dos processos de conversão energética e mesmo soluções que incorporem fontes alternativas de energia mais eco...
The increasing demand for real-time multimedia applications for groups of users, together with the need for assuring high quality support for end-to-end content distribution is motivating the scientific community and industry to develop novel control, management and optimization mechanisms with Quality of Service (QoS) and Quality of Experience (QoE) support. In this context, this paper introduces Q-OSys (QoS-r...
With the foreseen major increase in video traffic over the coming years, the current Internet’s design is being perceived as inefficient for handling the demanding flow of video over wireless access networks, populated by an ever increasing number of mobile terminals. The MEDIEVAL project aims to evolve the current Internet architecture to provide an optimized video support in all layers of the protocol stack. ...
Medicina ; Medicine
Generic Path (GP) is a new connectivity paradigm proposed to facilitate the inclusion of new applications and services abstracting communications between entities, regardless of their location or architectural layer. This paper enhances the GP architecture with a new mechanism integrating QoS-Routing and Resource Control (QoS-RRC) strategies to dynamically control GP session requirements regarding QoS and conne...
The FP7 4WARD clean-slate Project envisions overcoming the limitations of current Internet by redefining it to efficiently support complex value-added sessions and services, such as location-based, health-care, critical-mission, and geo processing. The list of networking innovations from 4WARD’s Future Internet (FI) proposal includes a new connectivity paradigm called Generic Path (GP), a common representation ...
This paper tackles the need for a Resource Management Database under the scope of the Generic Path (GP) architecture, as a result of the 4WARD 7th FP project clean-slate approach. GP is a concept for generalizing data transport and/or transformation across a network facility, allowing for instance route identification and path classification. Though, the GP notion by itself misses a way to efficiently track ava...
A crescente globalização da Internet e consequente procura de largura de banda nas redes IP existentes fez emergir a necessidade de um melhor planeamento das redes de telecomunicações. Tendo em vista esse fim foram criadas ferramentas aptas a auxiliar a gestão de redes, como software de monitorização, e em particular os simuladores de redes. Estes permitem a obtenção de resultados preciosos sem a consumo de rec...
Dissertação (mestrado)—Universidade de Brasília, Centro de Desenvolvimento Sustentável, 2006. ; Se o desenvolvimento depende da capacidade de um país em pesquisar, desenvolver e difundir inovações tecnológicas, o atual estágio de desenvolvimento do Brasil reflete a falta de um Sistema de Inovação Tecnológica, conforme análises de Freeman (1997) e Viotti (2002). O caso do carro a álcool, entretanto, constitui...
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