Ara es mostren els items 1-20 de 22

  • Aging in language dynamics 

    Mukherjee, Animesh; Tria, Francesca; Baronchelli, Andrea; Puglisic, Andrea; Loreto, Vittorio (2011-02-17)
    Article
    Accés obert
    Human languages evolve continuously, and a puzzling problem is how to reconcile the apparent robustness of most of the deep linguistic structures we use with the evidence that they undergo possibly slow, yet ceaseless, ...
  • Bosonic reaction-diffusion processes on scale-free networks 

    Baronchelli, Andrea; Catanzaro, Michele; Pastor Satorras, Romualdo (2008-07-23)
    Article
    Accés obert
    Reaction-diffusion processes can be adopted to model a large number of dynamics on complex networks, such as transport processes or epidemic outbreaks. In most cases, however, they have been studied from a fermionic ...
  • Complex networks and glassy dynamics: walks in the energy landscape 

    Moretti, Paolo; Baronchelli, Andrea; Barrat, Alain; Pastor Satorras, Romualdo (Institute of Physics (IOP), 2010-03)
    Article
    Accés obert
    We present a simple mathematical framework for the description of the dynamics of glassy systems in terms of a random walk in a complex energy landscape pictured as a network of minima. We show how to use the tools developed ...
  • 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 ...
  • Effects of temporal correlations in social multiplex networks 

    Starnini, Michele; Baronchelli, Andrea; Pastor Satorras, Romualdo (Macmillan Publishers, 2017-08-17)
    Article
    Accés obert
    Multi-layered networks represent a major advance in the description of natural complex systems, and their study has shed light on new physical phenomena. Despite its importance, however, the role of the temporal dimension ...
  • Evolutionary dynamics of the cryptocurrency market 

    ElBahrawy, Abeer; Alessandretti, Laura; Kandler, Anne; Pastor Satorras, Romualdo; Baronchelli, Andrea (2017-11-15)
    Article
    Accés obert
    The cryptocurrency market surpassed the barrier of $100 billion market capitalization in June 2017, after months of steady growth. Despite its increasing relevance in the financial world, a comprehensive analysis of the ...
  • 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; ...
  • Generalized voter-like models on heterogeneous networks 

    Moretti, Paolo; Baronchelli, Andrea; Starnini, Michele; Pastor Satorras, Romualdo (Springer, 2013)
    Capítol de llibre
    Accés restringit per política de l'editorial
    This Chapter presents a generalized model of consensus formation, which is able to encompass all previous formulations of copy/invasion processes inspired by variations on the voter model and the Moran process. It considered ...
  • Glass transition and random walks on complex energy landscapes 

    Baronchelli, Andrea; Barrat, Alain; Pastor Satorras, Romualdo (2009-08)
    Article
    Accés obert
    We present a simple mathematical model of glassy dynamics seen as a random walk in a directed weighted network of minima taken as a representation of the energy landscape. Our approach gives a broader perspective to previous ...
  • Heterogenous mean-field analysis of a generalized voter-like model on networks 

    Moretti, Paolo; Liu, S.Y.; Baronchelli, Andrea; Pastor Satorras, Romualdo (Springer, 2012-03)
    Article
    Accés obert
    We propose a generalized framework for the study of voter models in complex networks at the heterogeneous mean-field (HMF) level that (i) yields a unified picture for existing copy/invasion processes and (ii) allows for ...
  • Mean-field diffusive dynamics on weighted networks 

    Baronchelli, Andrea; Pastor Satorras, Romualdo (2010-07-12)
    Article
    Accés obert
    Diffusion is a key element of a large set of phenomena occurring on natural and social systems modeled in terms of complex weighted networks. Here, we introduce a general formalism that allows to easily write down mean-field ...
  • Modeling human dynamics of face-to-face interaction networks 

    Starnini, Michele; Baronchelli, Andrea; Pastor Satorras, Romualdo (American Institute of Physics (AIP), 2013-04-15)
    Article
    Accés obert
    Face-to-face interaction networks describe social interactions in human gatherings, and are the substrate for processes such as epidemic spreading and gossip propagation. The bursty nature of human behavior characterizes ...
  • Model reproduces individual, group and collective dynamics of human contact networks 

    Starnini, Michele; Baronchelli, Andrea; Pastor Satorras, Romualdo (2016-10-01)
    Article
    Accés obert
    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 ...
  • Networks in cognitive science 

    Baronchelli, Andrea; Ferrer Cancho, Ramon; Pastor Satorras, Romualdo; Chatter, Nick; Christiansen, Morten H. (Springer, 2013-07-01)
    Article
    Accés obert
    Networks of interconnected nodes have long played a key role in Cognitive Science, from artificial neural networks to spreading activation models of semantic memory. Recently, however, a new Network Science has been ...
  • Ordering dynamics of the multi-state voter model 

    Starnini, Michele; Baronchelli, Andrea; Pastor Satorras, Romualdo (Institute of Physics (IOP), 2012-10-30)
    Article
    Accés obert
    The voter model is a paradigm of ordering dynamics. At each time step, a random node is selected and copies the state of one of its neighbors. Traditionally, this state has been considered as a binary variable. Here, we ...
  • Random walks and search in time-varying networks 

    Perra, N.; Baronchelli, Andrea; Mocanu, D.; Gonçalves, B.; Pastor Satorras, Romualdo; Vespignani, Alessandro (2012-12-04)
    Article
    Accés obert
    The random walk process underlies the description of a large number of real-world phenomena. Here we provide the study of random walk processes in time-varying networks in the regime of time-scale mixing, i.e., when the ...
  • Random walks on complex trees 

    Baronchelli, Andrea; Catanzaro, Michele; Pastor Satorras, Romualdo (2008-07-18)
    Article
    Accés obert
    We study the properties of random walks on complex trees. We observe that the absence of loops is reflected in physical observables showing large differences with respect to their looped counterparts. First, both the vertex ...
  • Random walks on temporal networks 

    Starnini, Michele; Baronchelli, Andrea; Barrat, Alain; Pastor Satorras, Romualdo (2012)
    Article
    Accés obert
    Many natural and artificial networks evolve in time. Nodes and connections appear and disappear at various time scales, and their dynamics has profound consequences for any processes in which they are involved. The first ...
  • Role of feedback and broadcasting in the naming game 

    Baronchelli, Andrea (2011)
    Article
    Accés obert
    The naming game (NG) describes the agreement dynamics of a population of agents that interact locally in a pairwise fashion, and in recent years statistical physics tools and techniques have greatly contributed to shed ...
  • Scale-free networks emerging from multifractal time series 

    Budroni, Marcello A.; Baronchelli, Andrea; Pastor Satorras, Romualdo (American Chemical Society (ACS), 2017-05-16)
    Article
    Accés obert
    Methods connecting dynamical systems and graph theory have attracted increasing interest in the past few years, with applications ranging from a detailed comparison of different kinds of dynamics to the characterization ...