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Marek Cieplak (Institute of Physics, Polish Academy of Sciences)26/05/2010, 17:00A method based on the principle of entropy maximization is used to identify the gene interaction network with the highest probability of giving rise to experimentally observed transcript profiles [1]. In its simplest form, the method yields the pairwise gene interaction network, but it can also be extended to deduce higher order correlations. Analysis of microarray data from genes in...Go to contribution page
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Matteo Marsili (ICTP)26/05/2010, 18:30
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Pradeep Ravikumar (University of Texas, Austin)27/05/2010, 09:15
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Venkat Chandrasekaran (MIT)27/05/2010, 10:30
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Samuel Kaski (Aalto University)27/05/2010, 11:15
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Bert Kappen (Radboud University Nijmegen)27/05/2010, 14:30To compute a course of actions in the presence of uncertainty is the topic of stochastic optimal control theory. Such computations require the solution of complex partial differential equations and these computations become intractable for most problems. I will introduce a class of control problems that can be expressed as a KL divergence and that can be mapped onto a graphical model...Go to contribution page
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Silvio Franz (Université Paris-Sud)27/05/2010, 15:15Influenza viruses evolve at a high speed to escape acquired immunity and infect the same host several time. Contrary to naive expectation, this does not lead to a large diversity in the viral population. Phylogenetic studies show that the viral population display the characters of an "evolving quasispecies" with reduced instantaneous diversity. In this talk I will discuss a simple...Go to contribution page
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Angelo Vulpiani (Università di Roma "La Sapienza")27/05/2010, 16:30As first we discuss as the Fluctuation Dissipation Relations (FDRs) hold in a generalized form for any systems with a stationary probability distribution. One can say that the essence of the FDRs is the possibility to establish a bridge between equilibrium and non equilibrium properties. We show how FDRs are useful tools to understand the statistical behaviour of complex...Go to contribution page
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Shaomeng Qin (Aalto University)27/05/2010, 17:15
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Enzo Marinari (Università di Roma "La Sapienza")28/05/2010, 09:15Abstract. We analyze the limits inherent to the inverse reconstruction of a pairwise Ising spin glass based on susceptibility propagation. We establish the conditions under which the susceptibility propagation algorithm is able to reconstruct the characteristics of the network given first- and second-order local observables, evaluate eventual errors due to various types of noise in the...Go to contribution page
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Riccardo Zecchina (Politecnico di Torino)28/05/2010, 10:30Optimization under uncertainty deals with the problem of optimizing stochastic cost functions given some partial information on their inputs. These problems are extremely difficult to solve and yet pervade all areas of technological and natural sciences. We propose a general approach to solve such large-scale stochastic optimization problems and a Survey Propagation based algorithm...Go to contribution page
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Yasser Roudi (Nordita)28/05/2010, 11:15Recent advances in recording technology allow simultaneous measurement of the activity of many elements in a biological system, e.g. many neurons, genes etc. This has inspired people to study how this recorded data can be used to learn something about the connectivity between these elements. A useful and powerful platform for studying this problem is the inverse Ising problem: finding...Go to contribution page
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Simona Cocco (École Normale Supérieure)28/05/2010, 14:30I will introduce a procedure to infer the fields and the couplings of a spatially-distributed Ising model, given the magnetizations and pairwise correlations of spins. The algorithm is based on the recursive decomposition of the entropy into contributions coming from clusters of spins. I will explain and validate the procedure on synthetic data sets,and then apply it to experimental...Go to contribution page
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Simon Schultz (Imperial College)28/05/2010, 15:15New technologies such as high-density multi-electrode array recording and multiphoton calcium imaging allow the activity of large numbers of neurons to be monitored. However, analysis tools have lagged behind the experimental technology, with most approaches limited to very small population sizes. In the limit of short time windows, where neuronal activity can be binarized without loss...Go to contribution page
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Luca Dall'Asta (ICTP)28/05/2010, 16:30Game theoretic problems defined on graphs may admit many Nash equilibria, with very different properties. An example is provided by strategic substitutes game on network. Searching for (socially) optimal Nash equilibria in these games is a non-trivial task. I will discuss some algorithmic techniques based on Monte Carlo and Belief Propagation as well as learning methods by means of which...Go to contribution page
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28/05/2010, 17:15
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Martin Weigt (Institute for Scientific Interchange, Torino)29/05/2010, 09:15Experimental approaches to transient protein interactions are laborious and serendipitous, and our understanding of fundamental questions like the identification of interaction surfaces or the specificity of molecular recognition between interacting proteins is far from being complete. We propose a computational approach based on recent techniques from the statistical physics...Go to contribution page
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Mr WITOELAR, Aree (Comp. Science, University of Groningen)29/05/2010, 10:30
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Jaakko Hollmen (Aalto University)29/05/2010, 11:15DNA copy number aberrations, i.e. copy number amplifications and copy number deletions, are hallmarks of nearly all advanced tumors. We present the data collection of genome-wide DNA copy number amplification data consisting of data of over 4500 cases of human neoplasms. The data set has been gathered from scientific journal articles covering a period of ten years and is naturally...Go to contribution page
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Wilson Truccolo (Brown University)
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