JaxJUG, June 11, 2014: Monitoring Hadoop with Akka

JaxJUG, April 11, 2012:  Big Fast Data with MongoDB

JaxJUG, July 13, 2011:  Learning Scala through Open Source: regrest

JaxJUG, February 9, 2011:  Akka: High-Level Abstractions for Concurrency, Scalability, & Fault-Tolerance

Graph Drawing '93, Paris France:  An Automated Graph Drawing System Using Graph Decomposition (pp. 80-81)