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Massively Multiuser Virtual Environments (MMVEs) are attracting millions of players from all over the world. Currently used Client/Server infrastructures and technologies are reaching their limits of flexibility and scalability. We propose an approach that combines the technological advantages of two different paradigms, namely P2P networking and Cloud(More)
Distributed Virtual Environments (DVEs), like Massively Multiplayer Online Games (MMOG) are attracting millions of users from all over the world. However, as the number of simultaneous users keeps growing, the current used Client/Server infrastructure technologies are showing their limits on the side of the practicality and applicability. As a consequence,(More)
A fundamental problem for the development of Massively Multiplayer Online Games (MMOGs) is the definition of a mechanism supporting interest management, i.e. determining all the entities of the virtual world that are relevant for a given peer. To this end, we propose a hybrid architecture combining centralized and P2P solutions. Our proposal exploits a P2P(More)
In this paper, we propose a new method, called Convergent Scheduling, for scheduling a continuous stream of batch jobs on the machines of large-scale computing farms. This method exploits a set of heuristics that guide the scheduler in making decisions. Each heuristics manages a specific problem constraint, and contributes to carry out a value that measures(More)
P2P overlays based on Delaunay triangulations have been recently exploited to implement systems providing efficient routing and data broadcast solutions. Several applications such as Distributed Virtual Environments and geographical nearest neighbours selection benefit from this approach. This paper presents a novel distributed algorithm for the incremental(More)
Cloud computing infrastructures support dynamical and flexible access to computational, network and storage resources. To date, several disjoint industrial and academic technologies provide infrastructure level access to Clouds. Especially for industrial platforms, the evolution of de-facto standards goes together with worries about user lock-in to a(More)
A neonate with deficiency of branching enzyme (glycogenosis type IV) presented symptoms of severe hypotonia pre- and postnatally, and dilated cardiomyopathy in early infancy. The classical clinical manifestation of liver cirrhosis was not present, although amylopectin-like inclusions were found in the hepatocytes. In contrast to a previous report, the(More)
Gossip-based Peer-to-Peer protocols proved to be very efficient for supporting dynamic and complex information exchange among distributed peers. They are useful for building and maintaining the network topology itself as well as to support a pervasive diffusion of the information injected into the network. This is very useful in a world where there is a(More)
This paper presents a set of strategies for scheduling a stream of batch jobs on the machines of a heterogeneous computational farm. Our proposal is based on a flexible backfilling, which schedules jobs according to a priority assigned to each jobs submitted for the execution. Priority values are computed as a result of a set of heuristics whose main goal(More)