Connectivity and topology are known to yield information about networks, whose origin is self-organized, but the impact of {\it temporal dynamics} in a network is still mostly unexplored. Using an information theoretic approach to e-mail exchange, we show that an e-mail network allows for a separation of static and dynamic structures within it. The static structures are related to organizational units such as departments. The temporally linked structures turn out to be more goal-oriented, functional units such as committees and user groups.
@article{arxiv.cond-mat/0304433,
title = {Dialog in e-Mail Traffic},
author = {Jean-Pierre Eckmann and Elisha Moses and Danilo Sergi},
journal= {arXiv preprint arXiv:cond-mat/0304433},
year = {2007}
}