Second conference on self-similarity and its applications. INSA, Toulouse, France; 20--24 June 2005.

Smith Institute workshop. Eindhoven, the Netherlands; 2--3 December 2004.

First international conference on Complex Systems, Intelligence and Modern Technology Applications. Cherbourg, France; 19--22 September 2004.

Research session at the Isaac Newton Institute for Mathematical Sciences, Cambridge, UK; 1 August -- 23 December 2005.

Genomics, Networks, and Finance Engineering. Annual Program at the IMA, University of Minnesota. September 2003 -- June 2004.