An important topic in complex network research is the temporal evolution of networks. Existing approaches aim at analyzing the evolution extracting properties of either the entire network or local patterns. In this paper, we focus on detecting clusters of temporal snapshots of a network, to be interpreted as eras of evolution. To this aim, we introduce a novel hierarchical clustering methodology, based on a dissimilarity measure between two temporal snapshots of the network. We devise a framework to discover and browse the eras, supporting the exploration of the evolution at any level of temporal resolution. We show how our approach applies to real networks, by detecting eras in an evolving co-authorship graph; we illustrate how the discovered temporal clustering highlights the crucial moments when the network had profound changes in its structure. Our approach is finally boosted by introducing a meaningful labeling of the obtained clusters, such as the characterizing topics of each discovered era, thus adding a semantic dimension to our analysis.
|Title of host publication||SEBD 2010 - Proceedings of the 18th Italian Symposium on Advanced Database Systems|
|Number of pages||8|
|Publication status||Published - 2010|
|Event||18th Italian Symposium on Advanced Database Systems, SEBD 2010 - Rimini, Italy|
Duration: 20 Jun 2010 → 23 Jun 2010
|Conference||18th Italian Symposium on Advanced Database Systems, SEBD 2010|
|Period||20/06/10 → 23/06/10|