Koyak, R.A. “How should measurement error be accounted for in assessing the performance of X-ray fluorescence instruments?”   Seminar presented to the RAND Statistics Group, RAND Corporation, Santa Monica, CA, October 1999.

Ruth, D.M. and Koyak, R.A. “Applications of assignment algorithms to nonparametric tests for homogeneity.”  Seminar presented to the Operations Research Department, Naval Postgraduate School, Monterey, CA, April 2009.

Koyak, R.A. “Detecting change in multivariate data streams using minimum subgraphs.”  Seminar presented to the Applied Mathematics and Statistics Department, The Johns Hopkins University, Baltimore, MD, November 2011.