Exploració per autor "Vespignani, Alessandro"
Ara es mostren els items 11-30 de 34
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Dynamical and correlation properties of the Internet
Pastor Satorras, Romualdo; Vázquez, A; Vespignani, Alessandro (American Institute of Physics (AIP), 2001-11)
Article
Accés obertThe 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 obertWe 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 obertWe 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 obertMany 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 obertWe 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 obertIn 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'editorialWe 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 obertThe 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'editorialComplex 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'editorialThe 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 obertWe 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 obertComplex 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 obertWe 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 ... -
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 ... -
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 ... -
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 -
Structure of cycles and local ordering in complex networks
Caldarelli, G; Pastor Satorras, Romualdo; Vespignani, Alessandro (Springer, 2004-03-01)
Article
Accés obertWe study the properties of quantities aimed at the characterization of grid-like ordering in complex networks. These quantities are based on the global and local behavior of cycles of order four, which are the minimal ... -
The architecture of complex weighted networks
Barrat, A; Barthelemy, M; Pastor Satorras, Romualdo; Vespignani, Alessandro (2004-03-16)
Article
Accés obertNetworked structures arise in a wide array of different contexts such as technological and transportation infrastructures, social phenomena, and biological systems. These highly interconnected systems have recently been ... -
Topology and correlations in structured scale-free networks
Vázquez, A; Boguña Espinal, Marian; Moreno, Y; Pastor Satorras, Romualdo; Vespignani, Alessandro (2003-04)
Article
Accés obertWe study a recently introduced class of scale-free networks showing a high clustering coefficient and nontrivial connectivity correlations. We find that the connectivity probability distribution strongly depends on the ...