Conference/Seminar Talks
 A One Parameter Family of Expanding Wave Solutions of the Einstein Equations that Induces an Anomalous Acceleration into the Standard Model of Cosmology,
Regensburg Germany, September 2010 (Conference on Quantum Gravity), University of Wyoming, June 2010 (Workshop on Conservation Laws); Invited Lectures 0810: Geometry Seminar Stanford, Applied Math Colloquiums at Cal Tech, Penn State, Naval PostGraduate School Monterey, Academia Sinica, Central University and National Taiwan University in Taiwan; Croucher Lab Seminar at University of Science and Technology, Hong Kong; Applied Math Seminars at UCBerkeley, Konstanz University in Germany, and UCDavis; Conference talks at KTH Sweden and at SIAM in Miami.
 Numerical Simulation of GR Shock Waves by a Locally Inertial Godunov Method with Dynamic Time Dilation, University of Wyoming, June 2010, (Workshop on Conservation Laws); Philadephia, August 2010 (SIAM Special Session on Numerical Relativity); Konstanz University, Germany October 2010 (Applied Math Seminar)
 Periodic Solutions of the Compressible Euler Equations, Gehring Professor, University of Michigan
Fall 2007 (2 seminar talks)
 Periodic Solutions of the Compressible Euler Equations, Gehring Professor, University of Michigan
Fall 2007 (Colloquium)
 Numerical ShockWave Cosmology,
New Orleans, January 2007
 ShockWave Cosmology  Inside a Black Hole,
Academy Public Lecture, Indian National Academy of Sciences, Bangalore, January 2006
 Locally Inertial Glimm Scheme for General Relativity,
Plenary Talk, Stonybrook, July 2004
 Introduction to ShockWaves and General Relativity,
Three Lectures, Cambridge University, July 2003
