September 2007, ICNF 2007 Internat. Conf.~on Noise and Fluctuations, September 2007 Tokyo, Japan.
June 2007, SECON 2007 on Sensor, Mesh and Ad Hoc Communications and Networks, San Diego, CA.
May 2007, IEEE INFOCOM 2007 on Computer Communications and Networking, Anchorage, AL.
May 2007, 3rd Lehmann Symposium on Optimality, Houston, TX.
March 2007, Statistics Seminar, Los Alamos National Lab, NM.

August 2006, Summer School on Stochastic Control in Computer Science and Finance, TU Kaiserslautern, Germany
May 2006, International Workshop on Applied Probability, Univ. of Connecticut
February 2006, Colloquium, Dept. of Industrial and Systems Engineering, Texas A\&M University

September 2005, Workshop on Non-stationary and Non-linear Time-Series in Computational Finance. Kaiserslautern, Germany
August 2005, Joint Statistical Meeting of ASA and IMS, Minneapolis, MN
July 2005, Visiting, CCS-5 Basic and Applied Simulation Science, LANL, Los Alamos, NM
June 2005, Workshop on Statistics and Computing, Hailuoto, Finland
May 2005, Seminar, Division of Statistical Science, LANL, Los Alamos, NM
April 2005, Workshop on Heavy Tails and Long Range Dependence, Cornell, Ithaca, NY
March 2005, InfoCom2005, conference on Computer communications and networking, Miami, FL

November 2004, DARPA workshop on Network Management Systems, Monterey, CA
November 2004, Colloquium, Dept. of Statistics, Texas A&M, College Station, TX
October 2004, Colloquium, CAM, Cornell University, Ithaca, NY
July 2004, Summer School on Wavelet and Multifractal Analysis, Corsica, France
July 2004, Celebrating Statistics: Internat. Conf. in Honor of Sir David Cox, Univ. Neuchatel, Switzerland
July 2004, EPFL-I\&C Research Day on Self-organized Wireless Communication Systems, Switzerland
June 2004, Swiss Probability Seminar, Institute of Mathematical Statistics, University of Berne, Switzerland
June 2004, Seminar, Computer Communications Lab, I&C, EPFL, Lausanne, Switzerland
May 2004, Lehmann Symposium on Optimality, Rice University, Houston, TX
April 2004, Fractal 2004, Conference on Fractals and Complexity in Nature, Vancouver, Canada
March 2004, CoTS Conference of Texas Statisticians, Nacogdoches, TX
March 2004, CIRM Workshop on Powerlaws in probability and statistics, Luminy-Marseille, France
January 2004, DARPA workshop on Network Management Systems, Miami, FL