Exploració per autor "Pastor Satorras, Romualdo"
Ara es mostren els items 92-111 de 134
-
Quantifying echo chamber effects in information spreading over political communication networks
Cota, Wesley; Ferreira, Silvio C.; Pastor Satorras, Romualdo; Starnini, Michele (2019-12-09)
Article
Accés obertEcho chambers in online social networks, in which users prefer to interact only with ideologically-aligned peers, are believed to facilitate misinformation spreading and contribute to radicalize political discourse. In ... -
Quasistationary analysis of the contact process on annealed scale-free networks
Ferreira, Silvio C.; Ferreira, Ronan S.; Pastor Satorras, Romualdo (2011)
Article
Accés obertWe present an analysis of the quasistationary (QS) state of the contact process (CP) on annealed scale-free networks using a mapping of the CP dynamics in a one-step process and analyzing numerically and analytically the ... -
Quasistationary simulations of the contact process on quenched networks
Ferreira, Silvio C.; Ferreira, Ronan S.; Castellano, Claudio; Pastor Satorras, Romualdo (2011)
Article
Accés obertWe present high-accuracy quasistationary (QS) simulations of the contact process in quenched networks, built using the configuration model with both structural and natural cutoffs. The critical behavior is analyzed in the ... -
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 obertThe 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 in non-Poissoinan activity driven temporal networks
Moinet, Antoine; Starnini, Michele; Pastor Satorras, Romualdo (2019-09-17)
Article
Accés obertThe interest in non-Markovian dynamics within the complex systems community has recently blossomed, due to a new wealth of time-resolved data pointing out the bursty dynamics of many natural and human interactions, manifested ... -
Random walks on complex trees
Baronchelli, Andrea; Catanzaro, Michele; Pastor Satorras, Romualdo (2008-07-18)
Article
Accés obertWe 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 obertMany 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 ... -
Rate equation approach for correlations in growing network models
Barrat, Alain; Pastor Satorras, Romualdo (2005-03-22)
Article
Accés obertWe propose a rate equation approach to compute two vertex correlations in scale-free growing network models based on the preferential attachment mechanism. The formalism, based on previous work of Szabó et al. [Phys. Rev. ... -
Reaction-diffusion processes and metapopulation models in heterogeneous networks
Colizza, V; Pastor Satorras, Romualdo; Vespignani, Alessandro (2007-03-04)
Article
Accés obertDynamical reaction–diffusion processes and metapopulation models are standard modelling approaches for a wide array of phenomena in which local quantities—such as density, potentials and particles—diffuse and interact ... -
Reaction-diffusion system with self-organized critical behavior
Pastor Satorras, Romualdo; Vespignani, Alessandro (Springer, 2001-01)
Article
Accés obertWe describe the construction of a conserved reaction-diffusion system that exhibits self-organized critical (avalanche-like) behavior under the action of a slow addition of particles. The model provides an illustration of ... -
Relating topological determinants of complex networks to their spectral properties: structural and dynamical effects
Castellano, Claudio; Pastor Satorras, Romualdo (2017-10-27)
Article
Accés obertThe largest eigenvalue of a network’s adjacency matrix and its associated principal eigenvector are key elements for determining the topological structure and the properties of dynamical processes mediated by it. We present ... -
Relevance of backtracking paths in recurrent-state epidemic spreading on networks
Castellano, Claudio; Pastor Satorras, Romualdo (American Institute of Physics (AIP), 2018-11-27)
Article
Accés obertThe understanding of epidemics on networks has greatly benefited from the recent application of message-passing approaches, which allow us to derive exact results for irreversible spreading (i.e., diseases with permanent ... -
Routes to thermodynamic limit on scale-free networks
Castellano, Claudio; Pastor Satorras, Romualdo (American Institute of Physics (AIP), 2008-04-08)
Article
Accés obertWe show that there are two classes of finite size effects for dynamic models taking place on a scale-free topology. Some models in finite networks show a behavior that depends only on the system size N. Others present an ... -
Sandpiles and absorbing-state phase transitions: recent results and open problems
Muñoz Martínez, Miguel Ángel; Dickman, Ronald; Pastor Satorras, Romualdo; Vespignani, Alessandro; Zapperi, Stefano (2001-06-13)
Capítol de llibre
Accés restringit per política de l'editorial -
Scalar model of flocking dynamics on complex social networks
Miguel Lopez, M. Del Carmen; Pastor Satorras, Romualdo (American Institute of Physics (AIP), 2019-10-14)
Article
Accés obertWe investigate the effects of long-range social interactions in flocking dynamics by studying the dynamics of a scalar model of collective motion embedded in a complex network representing a pattern of social interactions, ... -
Scale-free behavioral cascades and effective leadership in schooling fish
Múgica Gallart, Julia; Torrents Monegal, Jordi; Cristin, Javier; Puy Contreras, Andreu; Miguel Lopez, M. Del Carmen; Pastor Satorras, Romualdo (Nature, 2022-06-24)
Article
Accés obertBehavioral contagion and the presence of behavioral cascades are natural features in groups of animals showing collective motion, such as schooling fish or grazing herbivores. Here we study empirical behavioral cascades ... -
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 obertMethods 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 ... -
Scaling of a slope: the erosion of tilted landscapes
Pastor Satorras, Romualdo; Rothman, Daniel H. (1998-11)
Article
Accés obertWe 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 ... -
Self-organization of collaboration networks
Ramasco, J J; Dorogovtsev, S N; Pastor Satorras, Romualdo (2004-09-14)
Article
Accés obertWe study collaboration networks in terms of evolving, self-organizing bipartite graph models. We propose a model of a growing network, which combines preferential edge attachment with the bipartite structure, generic for ... -
Slow dynamics and rare-region effects in the contact process on weighted tree networks
Odor, G.; Pastor Satorras, Romualdo (2012-08-28)
Article
Accés obertWe show that generic, slow dynamics can occur in the contact process on complex networks with a tree-like structure and a superimposed weight pattern, in the absence of additional (nontopological) sources of quenched ...