Ara es mostren els items 1-20 de 37

  • Activity driven modeling of time varying networks 

    Perra, N.; Gonçalves, B.; Pastor Satorras, Romualdo; Vespignani, Alessandro (2012-06-25)
    Article
    Accés restringit per política de l'editorial
    Network modeling plays a critical role in identifying statistical regularities and structural principles common to many systems. The large majority of recent modeling approaches are connectivity driven. The structural ...
  • Aging and percolation dynamics in a Non-Poissonian temporal network model 

    Moinet, Antoine; Starnini, Michele; Pastor Satorras, Romualdo (2016-08-24)
    Article
    Accés obert
    We present an exhaustive mathematical analysis of the recently proposed Non-Poissonian Activity Driven (NoPAD) model [Moinet et al., Phys. Rev. Lett. 114, 108701 (2015)], a temporal network model incorporating the empirically ...
  • Analytic model for the ballistic adsorption of polydisperse mixtures 

    Pastor Satorras, Romualdo (1999-05)
    Article
    Accés obert
    We study the ballistic adsorption of a polydisperse mixture of spheres onto a line. Within a mean-field approximation, the problem can be analytically solved by means of a kinetic equation for the gap distribution. In the ...
  • Burstiness and aging in social temporal networks 

    Moinet, Antoine; Starnini, Michele; Pastor Satorras, Romualdo (2015-03-13)
    Article
    Accés obert
    The presence of burstiness in temporal social networks, revealed by a power-law form of the waiting time distribution of consecutive interactions, is expected to produce aging effects in the corresponding time-integrated ...
  • Collective versus hub activation of epidemic phases on networks 

    Ferreira, Silvio C.; Salvador, Renan; Pastor Satorras, Romualdo (AMER PHYSICAL SOC, 2016-03-14)
    Article
    Accés restringit per política de l'editorial
    We consider a general criterion to discern the nature of the threshold in epidemic models on scale-free (SF) networks. Comparing the epidemic lifespan of the nodes with largest degrees with the infection time between them, ...
  • Competing activation mechanisms in epidemics on networks 

    Castellano, Claudio; Pastor Satorras, Romualdo (2012-04-20)
    Article
    Accés restringit per política de l'editorial
    In contrast to previous common wisdom that epidemic activity in heterogeneous networks is dominated by the hubs with the largest number of connections, recent research has pointed out the role that the innermost, dense ...
  • Distinct types of eigenvector localization in networks 

    Pastor Satorras, Romualdo; Castellano, Claudio (Macmillan Publishers, 2016-01-12)
    Article
    Accés obert
    The spectral properties of the adjacency matrix provide a trove of information about the structure and function of complex networks. In particular, the largest eigenvalue and its associated principal eigenvector are crucial ...
  • Effects of local population structure in a reaction-diffusion model of a contact process on metapopulation networks 

    de Souza Mata, Angelica; Ferreira, Silvio C.; Pastor Satorras, Romualdo (2013-10-30)
    Article
    Accés obert
    We investigate the effects of local population structure in reaction-diffusion processes representing a contact process (CP) on metapopulations represented as complex networks. Considering a model in which the nodes of a ...
  • Effects of mobility on ordering dynamics 

    Baronchelli, Andrea; Pastor Satorras, Romualdo (2009-11)
    Article
    Accés restringit per política de l'editorial
    Models of ordering dynamics allow us to understand natural systems in which an initially disordered population homogenizes some traits via local interactions. The simplest of these models, with wide applications ranging ...
  • Entropy of form and hierarchic organization 

    Wagensberg Lubinski, Jorge; Pastor Satorras, Romualdo (1992)
    Capítol de llibre
    Accés restringit per decisió de l'autor
    The use of the Theory of Information as a mathematical tool for the understanding of complex systems allows the application of the MaxEnt Principle as a criterion for the prediction of the final stationary states. The ...
  • 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 thresholds of the susceptible-infected-susceptible model on networks: a comparison of numerical and theoretical results 

    Ferreira, Silvio C.; Castellano, Claudio; Pastor Satorras, Romualdo (2012-10-15)
    Article
    Accés obert
    Recent work has shown that different theoretical approaches to the dynamics of the susceptible-infected-susceptible (SIS) model for epidemics lead to qualitatively different estimates for the position of the epidemic ...
  • Evolution in a changing environment 

    Baronchelli, Andrea; Chater, Nick; Christiansen, M.H.; Pastor Satorras, Romualdo (2013-01-10)
    Article
    Accés obert
    We propose a simple model for genetic adaptation to a changing environment, describing a fitness landscape characterized by two maxima. One is associated with “specialist” individuals that are adapted to the environment; ...
  • Irrelevance of information outflow in opinion dynamics models 

    Castellano, Claudio; Pastor Satorras, Romualdo (2011-01-27)
    Article
    Accés obert
    The Sznajd model for opinion dynamics has attracted a large interest as a simple realization of the psychological principle of social validation. As its most salient feature, it has been claimed that the Sznajd model is ...
  • Lifespan method as a tool to study criticality in absorbing-state phase transitions 

    de Souza Mata, Angelica; Boguñá, Marian; Castellano, Claudio; Pastor Satorras, Romualdo (2015-05-12)
    Article
    Accés obert
    In a recent work, a new numerical method (the lifespan method) has been introduced to study the critical properties of epidemic processes on complex networks [M. Boguna, C. Castellano, and R. Pastor-Satorras, Phys. Rev. ...
  • Model reproduces individual, group and collective dynamics of human contact networks 

    Starnini, Michele; Baronchelli, Andrea; Pastor Satorras, Romualdo (2016-10-01)
    Article
    Accés restringit per política de l'editorial
    Empirical data on the dynamics of human face-to-face interactions across a variety of social venues have recently revealed a number of context-independent structural and temporal properties of human contact networks. This ...
  • Nature of the epidemic threshold for the susceptible-infected-susceptible dynamics in networks 

    Boguñá, Marian; Castellano, Claudio; Pastor Satorras, Romualdo (2013-08-07)
    Article
    Accés obert
    We develop an analytical approach to the susceptible-infected-susceptible epidemic model that allows us to unravel the true origin of the absence of an epidemic threshold in heterogeneous networks. We find that a delicate ...
  • Non-mean-field behavior of the contact process on scale-free networks 

    Castellano, Claudio; Pastor Satorras, Romualdo (2006)
    Article
    Accés obert
    We present an analysis of the classical contact process on scale-free networks. A mean-field study, both for finite and infinite network sizes, yields an absorbing-state phase transition at a finite critical value of the ...
  • Nonlinear q-voter model 

    Castellano, C; Muñoz, M A; Pastor Satorras, Romualdo (2009-10)
    Article
    Accés obert
    We introduce a nonlinear variant of the voter model, the q-voter model, in which q neighbors (with possible repetition) are consulted for a voter to change opinion. If the q neighbors agree, the voter takes their opinion; ...