relation: http://eprints.imtlucca.it/1239/
title: Robustness and assortativity for diffusion-like processes in scale-free networks
creator: D'Agostino, Gregorio
creator: Scala, Antonio
creator: Zlatic, Vinko
creator: Caldarelli, Guido
subject: GE Environmental Sciences
subject: QC Physics
description: By analysing the diffusive dynamics of epidemics and of distress in complex networks, we study the effect of the assortativity on the robustness of the networks. We first determine by spectral analysis the thresholds above which epidemics/failures can spread; we then calculate the slowest diffusional times. Our results shows that disassortative networks exhibit a higher epidemiological threshold and are therefore easier to immunize, while in assortative networks there is a longer time for intervention before epidemic/failure spreads. Moreover, we study by computer simulations the sandpile cascade model, a diffusive model of distress propagation (financial contagion). We show that, while assortative networks are more prone to the propagation of epidemic/failures, degree-targeted immunization policies increases their resilience to systemic risk.
publisher: IOPscience
date: 2012-03
type: Article
type: PeerReviewed
format: application/pdf
language: en
rights: cc_by_nc
identifier: http://eprints.imtlucca.it/1239/1/epl_97_6_68006.pdf
identifier:   D'Agostino, Gregorio and Scala, Antonio and Zlatic, Vinko and Caldarelli, Guido  Robustness and assortativity for diffusion-like processes in scale-free networks.  EPL (Europhysics Letters), 97 (6).  p. 68006.  ISSN 0295-5075      (2012)  
relation: http://dx.doi.org/10.1209/0295-5075/97/68006
relation: 10.1209/0295-5075/97/68006