Ara es mostren els items 4-23 de 34

    • Characterization and modeling of weighted networks 

      Barthelemy, M; Barrat, A; Pastor Satorras, Romualdo; Vespignani, Alessandro (2005-01)
      Article
      Accés restringit per política de l'editorial
      We review the main tools which allow for the statistical characterization of weighted networks. We then present two case studies, the airline connection network and the scientific collaboration network which are representatives ...
    • Complex networks: patterns of complexity 

      Pastor Satorras, Romualdo; Vespignani, Alessandro (2010-07)
      Article
      Accés restringit per política de l'editorial
      The Turing mechanism provides a paradigm for the spontaneous generation of patterns in reaction–diffusion systems. A framework that describes Turing-pattern formation in the context of complex networks should provide a new ...
    • Corrections to scaling in the forest-fire model 

      Pastor Satorras, Romualdo; Vespignani, Alessandro (2000-05)
      Article
      Accés obert
      We present a systematic study of corrections to scaling in the self-organized critical forest-fire model. The analysis of the steady-state condition for the density of trees allows us to pinpoint the presence of these ...
    • 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 ...
    • Critical behavior and conservation in directed sandpiles 

      Pastor Satorras, Romualdo; Vespignani, Alessandro (2000-11)
      Article
      Accés obert
      We perform large-scale simulations of directed sandpile models with both deterministic and stochastic toppling rules. Our results show the existence of two distinct universality classes. We also provide numerical simulations ...
    • Critical load and congestion instabilities in scale-free networks 

      Moreno, Y; Pastor Satorras, Romualdo; Vázquez, A; Vespignani, Alessandro (2003-02-14)
      Article
      Accés obert
    • Cut-offs and finite size effects in scale-free networks 

      Boguña Espinal, Marian; Pastor Satorras, Romualdo; Vespignani, Alessandro (Springer, 2004-03-01)
      Article
      Accés obert
      We analyze the degree distribution’s cut-off in finite size scale-free networks. We show that the cut-off behavior with the number of vertices N is ruled by the topological constraints induced by the connectivity structure ...
    • Dynamical and correlation properties of the Internet 

      Pastor Satorras, Romualdo; Vázquez, A; Vespignani, Alessandro (American Institute of Physics (AIP), 2001-11)
      Article
      Accés obert
      The description of the Internet topology is an important open problem, recently tackled with the introduction of scale-free networks. We focus on the topological and dynamical properties of real Internet maps in a three-year ...
    • Dynamical patterns of epidemic outbreaks in complex heterogeneous networks 

      Barthelemy, M; Barrat, A; Pastor Satorras, Romualdo; Vespignani, Alessandro (2005-03-10)
      Article
      Accés obert
      We present a thorough inspection of the dynamical behavior of epidemic phenomena in populations with complex and heterogeneous connectivity patterns. We show that the growth of the epidemic prevalence is virtually instantaneous ...
    • Epidemic dynamics and endemic states in complex networks 

      Pastor Satorras, Romualdo; Vespignani, Alessandro (2001-05-22)
      Article
      Accés obert
      We study by analytical methods and large scale simulations a dynamical model for the spreading of epidemics in complex networks. In networks with exponentially bounded connectivity we recover the usual epidemic behavior ...
    • Epidemic dynamics in finite size scale-free networks 

      Pastor Satorras, Romualdo; Vespignani, Alessandro (American Institute of Physics (AIP), 2002-03)
      Article
      Accés obert
      Many real networks present a bounded scale-free behavior with a connectivity cutoff due to physical constraints or a finite network size. We study epidemic dynamics in bounded scale-free networks with soft and hard ...
    • Epidemic outbreaks in complex heterogeneous networks 

      Moreno, Y; Pastor Satorras, Romualdo; Vespignani, Alessandro (Springer, 2002-04)
      Article
      Accés obert
      We present a detailed analytical and numerical study for the spreading of infections with acquired immunity in complex population networks. We show that the large connectivity fluctuations usually found in these networks ...
    • Epidemic processes in complex networks 

      Pastor Satorras, Romualdo; Castellano, Claudio; Van Mieghem, Piet; Vespignani, Alessandro (2015-08-31)
      Article
      Accés obert
      In recent years the research community has accumulated overwhelming evidence for the emergence of complex and heterogeneous connectivity patterns in a wide range of biological and sociotechnical systems. The complex ...
    • Epidemic spreading in complex networks with degree correlations 

      Boguñá, Marian; Pastor Satorras, Romualdo; Vespignani, Alessandro (2003)
      Capítol de llibre
      Accés restringit per política de l'editorial
      We review the behavior of epidemic spreading on complex networks in which there are explicit correlations among the degrees of connected vertices.
    • Epidemic spreading in scale-free networks 

      Pastor Satorras, Romualdo; Vespignani, Alessandro (American Institute of Physics (AIP), 2001-04-02)
      Article
      Accés obert
      The Internet has a very complex connectivity recently modeled by the class of scale-free networks. This feature, which appears to be very efficient for a communications network, favors at the same time the spreading of ...
    • Epidemics and immunization in scale-free networks 

      Pastor Satorras, Romualdo; Vespignani, Alessandro (Wiley-VCH, 2003)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Complex interacting networks are observed in systems from such diverse areas as physics, biology, economics, ecology, and computer science. For example, economic or social interactions often organize themselves in complex ...
    • 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 ...
    • Field theory of absorbing phase transitions with a nondiffusive conserved field 

      Pastor Satorras, Romualdo; Vespignani, Alessandro (2000-11)
      Article
      Accés obert
      We investigate the critical behavior of a reaction-diffusion system exhibiting a continuous absorbing-state phase transition. The reaction-diffusion system strictly conserves the total density of particles, represented as ...
    • Immunization of complex networks 

      Pastor Satorras, Romualdo; Vespignani, Alessandro (2002-02)
      Article
      Accés obert
      Complex networks such as the sexual partnership web or the Internet often show a high degree of redundancy and heterogeneity in their connectivity properties. This peculiar connectivity provides an ideal environment for ...
    • Large-scale topological and dynamical properties of the Internet 

      Vázquez, A; Pastor Satorras, Romualdo; Vespignani, Alessandro (2002-06)
      Article
      Accés obert
      We study the large-scale topological and dynamical properties of real Internet maps at the autonomous system level, collected in a 3-yr time interval. We find that the connectivity structure of the Internet presents ...