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In this paper we investigate the problem of counting the size of a network where processes are anonymous (i.e, they share the same identifier) and the network topology constantly changes controlled by an adversary able to look internal process states and add and remove edges in order to contrast the convergence of the algorithm to the correct count. It is(More)
Counting is a fundamental problem of every distributed system as it represents a basic building block to implement high level abstractions. In anonymous dynamic networks, counting is far from being trivial as nodes have no identity and the knowledge about the network is limited to the local perception of the process itself. Moreover , nodes have to cope(More)
This paper considers the Approximate Agreement problem in presence of mobile Byzantine agents. We prove lower bounds on the number of correct processes to solve such problem. To do that we prove that the existing solutions tolerant to Byzantine agents still holds in such case and under which conditions.
Glutamatergic dysfunction is one of the major hypotheses for the pathogenesis of schizophrenia. The GRIA1 gene encodes for one (GluR1) of the four (GluR1-4) ionotropic AMPA receptor subunits. GRIA1 is a good candidate gene for susceptibility to schizophrenia since it maps in 5q33, a region where the presence of susceptibility loci has been suggested by(More)
Eleven international jumpers and throwers engaged in year round training were divided into experimental (n=6) and control (n=5) groups. The experimental group was tested before and after a 3 weeks simulated hypergravity period, and again 4 weeks after the hypergravity period. The high gravity condition was created by wearing a vest weighing about 13% of the(More)
Providing distributed processes with concurrent objects is a fundamental service that has to be offered by any distributed system. The classical shared read/write register is one of the most basic ones. Several protocols have been proposed that build an atomic register on top of an asyn- chronous message-passing system prone to process crashes. In the same(More)
There is emerging evidence that psychosis in Alzheimer Disease (AD) represents a clinically relevant phenotype with a distinct biological process. It has been reported that a functional polymorphism of the catechol-O-methyltransferase (COMT) gene predisposes to an increased risk for schizophrenia and likely to psychosis susceptibility. Aim of this study was(More)
An overlay network is formed on top of - and generally independently from - the underlying physical computer network, by the peers (nodes) of a P2P system. The dynamics of peers is taken into account by devising appropriate overlay maintenance protocols that are able to join and leave peers from the overlay. Due to the need for scaling in the number of(More)