Franco Robledo

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In this paper we present the GoalBit platform. GoalBit is the first open source peer-to-peer system for the distribution of real-time video streams through the Internet. The main advantage of a P2P architecture is the possibility of exploiting the available bandwidth unused by the set of user' hosts connected to the network. The main difficulty is that(More)
This paper explores the design of a P2P architecture that sends real-time video over the Internet. The aim is to provide good quality levels in a highly dynamic P2P topology, where the frequent connections/disconnections of the nodes makes it difficult to offer the Quality-of-Experience (QoE) needed by the client. We study a multi-source streaming approach(More)
The Generalized Steiner Problem with Node-Connectivity constraints (GSPNC) consists of determining of a minimum cost subnetwork of a given network where some pairs of nodes are required to satisfy node-connectivity requirements. The GSPNC has applications to the design of low-cost communications networks which can survive failures in the servers as well as(More)
This work presents a metaheuristic approach to solve the Capacitated m-Ring Star Problem (CmRSP), a problem introduced by Baldacci et al. [1] which models the design of telecommunication networks with survivability properties. The CmRSP consists of finding a set of m cycles (rings), each of them including the central depot (the central telephone office), a(More)
BACKGROUND Debate as to whether surgery in severe necrotizing pancreatitis (SNP) should be done early or late has been present ever since the disease was described. There are no prospective, randomized studies addressing this specific issue. METHODS Patients with SNP, documented clinically, with Ranson's criteria, and dynamic pancreatography (DP) findings(More)
This paper introduces a Combinatory Optimization Problem (COP) which captures the performance in cooperation of a P2P Streaming Network, considered at the buffer level. A new family of strategies of cooperation is defined, which represents the order of query of pieces in a communication between peers. We define a measure of quality for each strategy, based(More)
In this paper, we present an algorithm based on the GRASP meta-heuristic for solving a dynamic assignment problem in a P2P network designed for sending real-time video over the Internet. In a highly dynamic P2P topology, the frequent connections and disconnections of nodes are the main obstacle we face when trying to offer a high quality-of-experience (QoE)(More)