Monitoring Network Evolution using MDL
Ferlez, J.; Faloutsos, C.; Leskovec, J.; Mladenic, D.; Grobelnik, M.
Data Engineering, 2008. ICDE 2008. IEEE 24th International Conference on
Volume , Issue , 7-12 April 2008 Page(s):1328 - 1330
Digital Object Identifier   10.1109/ICDE.2008.4497545
Summary:Given publication titles and authors, what can we say about the evolution of scientific topics and communities over time? Which communities shrunk, which emerged, and which split, over time? And, when in time were the turning points? We propose TimeFall, which can automatically answer these questions given a social network/graph that evolves over time. The main novelty of the proposed approach is that it needs no user-defined parameters, relying instead on the principle of minimum description length (MDL), to extract the communities, and to find good cut-points in time when communities change abruptly: a cut-point is good, if it leads to shorter data description. We illustrate our algorithm on synthetic and large real datasets, and we show that the results of the TimeFall agree with human intuition.

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