id author title date pages extension mime words sentences flesch summary cache txt cord-355393-ot7hztyk Yuan, Peiyan Community-based immunization in opportunistic social networks 2015-02-15 .txt text/plain 5983 467 66 More interestingly, we find that high local importance but non-central nodes play a big role in epidemic spreading process, removing them improves the immunization efficiency by 25% to 150% at different scenarios. To this end, we investigate the evolution of community structure in opportunistic social networks, and analyze the effect of community-based immunization strategy on epidemic spreading. We observe that the most efficient immunization strategy on epidemic spreading is to remove nodes with high local importance in communities. Although many random mobility models, such as Random Walk and Random Way Point, have been widely used in opportunistic social networks for evaluating routing performance or even the epidemic dynamics [30, 31] , they cannot reflect the main features of human mobility, including the truncated power-law flights and pause-times, the heterogeneously bounded mobility areas of different nodes, etc. ./cache/cord-355393-ot7hztyk.txt ./txt/cord-355393-ot7hztyk.txt