Articolele autorului Gabriel Istrate
Link la profilul stiintific al lui Gabriel Istrate

Software-generated paper accepted at IEEE Conference

http://entertainment.slashdot.org/article.pl?sid=08/12/23/2321242

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Bifurcatii. ISI. Articol in „Observator Cultural” (autor Liviu Ornea)

http://www.observatorcultural.ro/BIFURCATII.-ISI*articleID_20846-articles_details.html

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On the dynamics of Social Balance on general networks (with an application to XOR-SAT)

We study nondeterministic and probabilistic versions of a discrete dynamical system (due to T. Antal, P. L. Krapivsky, and S. Redner) inspired by Heider's social balance theory. We investigate the convergence time of this dynamics on several classes of graphs. Our contributions include: 1. We point out the connection between the triad dynamics and a generalization of annihilating walks to hypergraphs. In particular, this connection allows us to completely

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The Peculiar Phase Structure of Random Graph Bisection

The mincut graph bisection problem involves partitioning the n vertices of a graph into disjoint subsets, each containing n/2 vertices, while minimizing the number of "cut" edges with an endpoint in each subset. When considered over sparse random graphs, the phase structure of the graph bisection problem displays certain familiar properties, but also some surprises. It is known that when the mean degree is below the critical value of 2 log 2, the

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Reconnecting the Science of the New EU Members to the World/European Science – The Case of Romania

http://jeruccs2008.org/node/672

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Effectiveness of Journal Ranking Schemes as a Tool for Locating Information

http://www.plosone.org/article/info:doi/10.1371/journal.pone.0001683

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Einstein Versus the Physical Review – A great scientist can benefit from peer review, even while refusing to have anything to do with it.

http://scitation.aip.org/journals/doc/PHTOAD-ft/vol_58/iss_9/43_1.shtml

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Dissecting the Artificial: The Adversarial Scheduling approach to validating Game-Theoretic models and Social Simulations

We describe the scope of Adversarial Scheduling Analysis, an approach to validating game-theoretic models and Social Simulations. We discuss a couple of examples showing that this approach is feasible (at least in a couple of cases) and can lead to nontrivial mathematical results. A preliminary version can be downloaded freely from http://www.ieat.ro:8080/IeAT/researchreports/essa08-istrate.doc/download

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Grammatical Inference and Symbolic Dynamics

[Published only as an abstract on the conference website. Full-length paper to follow] We show that Lindenmayer systems can be learned in polynomial time from membership and equivalence queries (that is queries are syntax trees of the corresponding grammar). The result is directly motivated by (and can be applied to) the problem of learning the symbolic representations associated to dynamical systems induced by unimodal (and several classes of multimodal)

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A report by the International Mathematical Union on citation statistics

http://www.mathunion.org/fileadmin/IMU/Report/CitationStatistics.pdf

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