Professor Yuekai Sun and his coauthor Anil Damle are awarded the 2018 Youden Prize for Best Expository Paper for their paper  “A Geometric Approach to Archetypal Analysis and Nonnegative Matrix Factorization" published in Technometrics.  The award will be officially presented at the Fall Technical Conference (FTC), Oct. 3-5, 2018 in West Palm Beach, Florida.