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***** To join INSNA, visit http://www.insna.org ***** The article Dr. Christopoulos mentions is freely available [from arXiv]. See: _http://arxiv.org/abs/physics/0507179_ (http://arxiv.org/abs/physics/0507179) _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.