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| Content Provider | ACM Digital Library |
|---|---|
| Author | Banerjee, Siddhartha Shakkottai, Sanjay Krishnasamy, Subhashini |
| Abstract | We investigate the sensitivity of epidemic behavior to a bounded susceptibility constraint -- susceptible nodes are infected by their neighbors via the regular SI/SIS dynamics, but subject to a cap on the infection rate. Such a constraint is motivated by modern social networks, wherein messages are broadcast to all neighbors, but attention spans are limited. Bounded susceptibility also arises in distributed computing applications with download bandwidth constraints, and in human epidemics under quarantine policies. Network epidemics have been extensively studied in literature; prior work characterizes the graph structures required to ensure fast spreading under the SI dynamics, and long lifetime under the SIS dynamics. In particular, these conditions turn out to be meaningful for two classes of networks of practical relevance -- dense, uniform (i.e., clique-like) graphs, and sparse, structured (i.e., star-like) graphs. We show that bounded susceptibility has a surprising impact on epidemic behavior in these graph families. For the SI dynamics, bounded susceptibility has no effect on star-like networks, but dramatically alters the spreading time in clique-like networks. In contrast, for the SIS dynamics, clique-like networks are unaffected, but star-like networks exhibit a sharp change in extinction times under bounded susceptibility. Our findings are useful for the design of disease-resistant networks and infrastructure networks. More generally, they show that results for existing epidemic models are sensitive to modeling assumptions in non-intuitive ways, and suggest caution in directly using these as guidelines for real systems. |
| Starting Page | 263 |
| Ending Page | 275 |
| Page Count | 13 |
| File Format | |
| ISBN | 9781450327893 |
| DOI | 10.1145/2591971.2591977 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2014-06-16 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Bounded susceptibility Network epidemics Si/sis dynamics Non-linear dynamics |
| Content Type | Text |
| Resource Type | Article |
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