Ara es mostren els items 1-12 de 140

    • 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 Capaceti, José 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 Lubinski, 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 Lubinski, 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 ...