“Slurry Trench Design and Construction in Difficult Conditions,” Deep Foundations Institute Slurry Wall Committee Technical Lecture, St. Louis , MO , August 26, 2005 . “Cantilever Frozen Ground Structure to Support 18M Deep Excavation,” North American Tunneling,” April 17-22, 2004, Atlanta, GA , pp 251-258. (with Dong K. Chang, Hugh S. Lacy, & Peter A. van Dijk)

"Liquefaction Assessment Methodologies for Seismic Bridge Design and their Application to New York City Projects," 2nd International Bridge Conference, New York City, Bridge Engineering Association, October 20-21, 2003, in Recent Developments in Bridge Engineering, pp. 111-122 (with S. Nikolaou and P. Edinger). “Just the Facts: Investigation of the 1987 Collapse of the NYS Thruway Bridge Over Schoharie Creek,” Proceedings of the 2003 Forensic Engineering Seminar “Forensic Engineers' Role in the Determination and Resolution of Design Deficiencies,” ASCE Met Section Forensic Committee and Columbia University Department of Civil Engineering, June 16, 2003, pp. 35 - 49. "Seismic Pile-Soil-Structure Interaction for a Bridge Retrofit Project," Proceedings, 7th International Conference on Inspection, Appraisal, Repairs & Maintenance of Buildings & Structures, Nottingham, UK, September 11-13, 2001, pp. 499-506. (with S. Nikolaou ) "Caliper for Profiling the Width of Slurry-Supported Excavations," Geotechnical Instrumentation News, Volume 18, No. 3, September 2000, pp 21-23. (with D. R. Good) "Ground Freezing for Tunnel Face Stability," North American Tunneling Conference NAT 2000, Boston , MA , June 6 - 11, 2000 . (with H. S. Lacy and D. K. Chang) "Groundwater Cut-Off for Jacked Tunnel with Ground Freezing," Rapid Excavation and Tunneling Conference Proceedings June 21-23, 1999 , Orlando , FL (with H. S. Lacy, P. M. Rice, and P. Schmall) "Two Weight System for Measuring Depth and Sediment in Slurry-Supported Excavations," Field Instrumentation for Soil and Rock, ASTM No. STP 1358, 1998. (with D. R. Good) "Design and Construction of a Deep Slurry Trench Barrier," International Containment Technology Conference and Exhibition, St. Petersburg , FL , February, 1997.