Volume 79, Number 3, August 2007
Article Number 38002
Number of page(s) 5
Section Interdisciplinary Physics and Related Areas of Science and Technology
Published online 16 July 2007
EPL, 79 (2007) 38002
DOI: 10.1209/0295-5075/79/38002

Modular effects on epidemic dynamics in small-world networks

H. Zhao and Z. Y. Gao

State Key Laboratory of Rail Traffic Control and Safety, School of Traffic and Transportation, Beijing Jiaotong University - Beijing, 100044, PRC

received 28 April 2007; accepted in final form 14 June 2007; published August 2007
published online 16 July 2007

Many real-world networks are characterized by modular structure. In this letter, modular effects on epidemic spreading of susceptible-infected-refractory-susceptible (SIRS) model in small-world networks are investigated. Simulation results show that, together with the disorder of the inter-module connections and mean degree of the system the modular structure may affect the synchronization behavior in propagation. More importantly, it is found that the interplay between mean degree and modular structure may lead to a nonmonotone variation of the synchronization behavior in the system.

89.75.Hc - Networks and genealogical trees.
87.23.Ge - Dynamics of social systems.
87.19.Xx - Diseases.

© Europhysics Letters Association 2007