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Community Detection in a Large Real-World Social Network. Karsten Steinhaeuser Nitesh V. Chawla DIAL Research Group www.nd.edu/~dial University of Notre Dame. April 1, 2008. Cellular Phone Network. Real social network Represents actual interactions between individuals
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Community Detectionin a Large Real-World Social Network Karsten SteinhaeuserNitesh V. Chawla DIAL Research Group www.nd.edu/~dial University of Notre Dame April 1, 2008
Cellular Phone Network • Real social network • Represents actual interactions between individuals • Requires intent to communicate • Network dimensions • 1.3 million nodes (customers) • 1.2 million edges (aggregate of voice and text) • Contains a wealth of data • Communication Links • Customer Demographics • Temporal Data • Spatial Data
Input Graph Weight No Weighting Topology-Based Attribute-Based Weighted Graph Walk Clustering Using Random Walks Co-Association Matrix Combine Agglomerationwith EA Community Structure Community Detectionwith Random Walks
Experimental Results • Edge weighting based on topology • CCS = clustering coefficient similarity • CNS = common neighbor similarity • Real edge weights • Call frequency • Call duration • NAS = edgeweighting basedon node attributes
Future Work • Incorporate network dynamics • Spatial data • Temporal data