TY  - JOUR
ID  - eprints1239
VL  - 97
IS  - 6
JF  - EPL (Europhysics Letters)
UR  - http://dx.doi.org/10.1209/0295-5075/97/68006
Y1  - 2012/03//
KW  - PACS: 87.23.Ge Dynamics of social systems; 89.75.Hc Networks and genealogical trees; 05.70.Ln Nonequilibrium and irreversible thermodynamics
TI  - Robustness and assortativity for diffusion-like processes in scale-free networks
AV  - public
N2  - 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.
PB  - IOPscience
SN  - 0295-5075
A1  - D'Agostino, Gregorio
A1  - Scala, Antonio
A1  - Zlatic, Vinko
A1  - Caldarelli, Guido
ER  -