eprintid: 1239
rev_number: 10
eprint_status: archive
userid: 6
dir: disk0/00/00/12/39
datestamp: 2012-03-26 07:46:36
lastmod: 2016-04-07 09:48:48
status_changed: 2012-03-26 07:46:36
type: article
metadata_visibility: show
creators_name: D'Agostino, Gregorio
creators_name: Scala, Antonio
creators_name: Zlatic, Vinko
creators_name: Caldarelli, Guido
creators_id: 
creators_id: 
creators_id: 
creators_id: guido.caldarelli@imtlucca.it
title: Robustness and assortativity for diffusion-like processes in scale-free networks
ispublished: pub
subjects: GE
subjects: QC
divisions: EIC
full_text_status: public
keywords: PACS: 87.23.Ge Dynamics of social systems; 89.75.Hc Networks and genealogical trees; 05.70.Ln Nonequilibrium and irreversible thermodynamics
abstract: 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.
date: 2012-03
date_type: published
publication: EPL (Europhysics Letters)
volume: 97
number: 6
publisher: IOPscience
pagerange: 68006
id_number: 10.1209/0295-5075/97/68006
refereed: TRUE
issn: 0295-5075
official_url: http://dx.doi.org/10.1209/0295-5075/97/68006
related_url_url: http://arxiv.org/abs/1105.3574
projects: EC FET Open Project “FOC” Nr. 255987
citation:   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)  
document_url: http://eprints.imtlucca.it/1239/1/epl_97_6_68006.pdf