Desenvolupar l'estudi de diversos sistemes complexos, caracteritzats per una dinàmica microscòpica senzilla que dóna lloc a un complex comportament macroscòpic. Les eines emprades són, per una banda, la simulació per ordinador fent servir: el mètode de la dinàmica molecular, el mètode de Montecarlo, els autòmats cel·lulars i els models discrets (IbM) basats en els elements biòtics i abiòtics que configuren el sistema. Per altra banda, també desenvolupem models teòrics, mitjançant teories de camp mitjà, equacions mestres, el grup de renormalització i altres temes de física fonamental. Els principals camps d'aplicació són: caracterització i modelització de xarxes complexes; criticalitat autoorganitzada; dany per radiació en aliatges; migració de fronteres i creixement de macles; modelització de sistemes microbians d'interès biotecnològic; microbiologia predictiva i seguretat alimentària; compostatge.

http://futur.upc.edu/SC-SIMBIO

The aim is to study complex systems characterised by simple microscopic dynamic rules that yield complex macroscopic behaviour. The tools employed for this purpose, which are based on computer simulation, include molecular dynamics and Monte Carlo methods, cellular automata, and individual-based models (IBMs), based on the biotic and abiotic elements of which a system is composed. Theoretical methods are also pursued, using mean-field theories, master equations, renormalisation groups and other fundamental tools in physics. The main fields of application are the characterisation and modelling of complex networks; self-organised criticality; radiation damage; boundary migration and twin growth; modelling of microbial systems for biotechnology; predictive microbiology and food safety; and the composting process.

http://futur.upc.edu/SC-SIMBIO

The aim is to study complex systems characterised by simple microscopic dynamic rules that yield complex macroscopic behaviour. The tools employed for this purpose, which are based on computer simulation, include molecular dynamics and Monte Carlo methods, cellular automata, and individual-based models (IBMs), based on the biotic and abiotic elements of which a system is composed. Theoretical methods are also pursued, using mean-field theories, master equations, renormalisation groups and other fundamental tools in physics. The main fields of application are the characterisation and modelling of complex networks; self-organised criticality; radiation damage; boundary migration and twin growth; modelling of microbial systems for biotechnology; predictive microbiology and food safety; and the composting process.

http://futur.upc.edu/SC-SIMBIO

Enviaments recents

  • Correlations in complex networks 

    Serrano Moral, Maria Angeles; Boguña Espinal, Marian; Pastor Satorras, Romualdo; Vespignani, Alessandro (2007-01-01)
    Capítol de llibre
    Accés restringit per política de l'editorial
    This book is the culmination of three years of research effort on a multidisciplinary project in which physicists, mathematicians, computer scientists and social scientists worked together to arrive at a unifying picture ...
  • Evolution and structure of the internet: a statistical physics approach 

    Pastor Satorras, Romualdo; Vespignani, Alessandro (Cambridge University Press, 2004-02-28)
    Llibre
    Accés restringit per política de l'editorial
    The talk will present an overview of the large-scale topological and dynamical properties of real Internet maps. First I will review the methodology used to obtain large scale maps of the Internet at the router and autonomous ...
  • Particle-cluster aggregation with dipolar interactions 

    Pastor Satorras, Romualdo; Rubí, J. Miguel (1995-06)
    Article
    Accés obert
    The properties of aggregates generated from an off-lattice, two-dimensional, particle-cluster aggregation model with dipolar interparticle interactions have been investigated. The fractal dimension seems to be a monotonically ...
  • Branch distribution in diffusion-limited aggregation: a maximum entropy approach 

    Pastor Satorras, Romualdo; Wagensberg, Jorge (1996-02-15)
    Article
    Accés restringit per política de l'editorial
    A new approach to the branching structure of diffusion-limited aggregation (DLA) clusters is proposed, in which the stress is laid not on the (traditionally used) order of the branches, but on their mass. The branch ...
  • Multifractal properties of power-law time sequences: application to rice piles 

    Pastor Satorras, Romualdo (1997-11)
    Article
    Accés obert
    We study the properties of time sequences extracted from a self-organized critical system, within the framework of the mathematical multifractal analysis. To this end, we propose a fixed-mass algorithm, well suited to deal ...
  • Fractal properties of cluster of colloidal magnetic particles 

    Pastor Satorras, Romualdo; Rubí Capaceti, José Miguel (1998-05)
    Article
    Accés restringit per política de l'editorial
    We have studied the properties of clusters of colloidal magnetic particles generated from a 2D aggregation model with dipolar interparticle interactions. Particles diffuse off-lattice, experiencing dipolar 1 with the already ...
  • Stochastic equation for the erosion of inclined topography 

    Pastor Satorras, Romualdo; Rothman, Daniel H. (American Institute of Physics (AIP), 1998-05-11)
    Article
    Accés obert
    We present a stochastic equation to model the erosion of topography with fixed inclination. The inclination causes the erosion to be anisotropic. A zero-order consequence of the anisotropy is the dependence of the prefactor ...
  • Long-range-interaction induced ordered structures in deposition processes 

    Pastor Satorras, Romualdo; Rubí Capaceti, José Miguel (American Institute of Physics (AIP), 1998-06-15)
    Article
    Accés obert
    We present a new model of sequential adsorption in which the adsorbing particles experience dipolar interactions. We show that in the presence of these long-range interactions, highly ordered structures in the adsorbed ...
  • The maximum entropy principle and the nature of fractals 

    Pastor Satorras, Romualdo; Wagensberg, Jorge (1998-06-19)
    Article
    Accés obert
    We apply the Principle of Maximum Entropy to the study of a general class of deterministic fractal sets. The scaling laws peculiar to these objects are accounted for by means of a constraint concerning the average content ...
  • Scaling of a slope: the erosion of tilted landscapes 

    Pastor Satorras, Romualdo; Rothman, Daniel H. (1998-11)
    Article
    Accés obert
    We formulate a stochastic equation to model the erosion of a surface with fixed inclination. Because the inclination imposes a preferred direction for material transport, the problem is intrinsically anisotropic. At zeroth ...
  • Kinetic growth of field-oriented chains in dipolar colloidal solutions 

    Miguel Lopez, M. Del Carmen; Pastor Satorras, Romualdo (1999-01)
    Article
    Accés obert
    Experimental studies on the irreversible growth of field-induced chains of dipolar particles suggest an asymptotic power-law behavior of several relevant quantities. We introduce a Monte Carlo model of chain growth that ...
  • Universality classes in directed sandpile models 

    Pastor Satorras, Romualdo; Vespignani, Alessandro (1999-07-27)
    Article
    Accés restringit per política de l'editorial
    We perform large-scale numerical simulations of a directed version of the two-state stochastic sandpile model. Numerical results show that this stochastic model defines a new universality class with respect to the Abelian ...

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