"Punctured vs Rateless Codes for Hybrid ARQ," Tsinghua University, Beijing, China, October 2006.

"On Average Throughput Benefits in Network Coding" University of Southern California August 2006.

"Frames in Quantum and Classical Information Theory," Princeton-Rutgers Seminar Series in Information Sciences & Systems, March 2004.

"Network Coding: From Graph Theory to Algebraic Geometry," Columbia University, February 2004.

"Hybrid ARQ in Wireless Networks," presented at Wireless System Lab Seminar, Texas A&M University, April 2003, and DIMACS Workshop on Network Information Theory, March 2003.

"Algebra of LDPC Codes," presented AMS 2002 National Meeting, San Diego, CA, Jan. 2002, and DIMACS Workshop on Codes and Complexity, Dec. 2001.

"Quantum Data Compression," presented at MSRI Information Theory Workshop, Berkeley, CA, Feb. 2002, and AMS 2001 Regional Meeting, Hoboken, NJ, April 2001.