Solving soil interaction problems through a
fundamental science-based inquiry approach in a
creative, collaborative, and interdisciplinary environment.
"Opportunities for Improving CPT Based Pile Design Methods", Transportation Research Board, Annual Meeting 1999, Washington, D.C., January 13, 1999.
"Improved Measurements of Side Friction Using Textured CPT Friction Sleeves", American Society of Civil Engineers, Geo-Institute, GeoDenver2000, Denver, Colorado, August, 5, 2000.
"The 'S-Shaped' Response of Soil Under Cyclic Shearing: a Micro-Mechanical Investigation", Center for Offshore Foundation Systems Workshop, University of Western Australia, Perth, Australia, November 13, 2001.
"Physical Evidence of Shear Banding at Granular-Continuum Interfaces", American Society of Civil Engineers, Engineering Mechanics Conference 2002 Conference, New York, New York, June 4, 2002.
"Detection of Soil Layering in Varved Clay using a Miniature Piezoprobe", Soil Rock America 2003 Conference, Boston, MA, June 23, 2003.
"Effect of Cementation on Cyclic Soil-Structure Interface Behavior", American Society of Civil Engineers, Engineering Mechanics Conference 2003 Conference, Seattle, WA, July 18, 2003.
"Evaluation of the Undrained Shear Strength Profile in Soft Layered Clay Using Full-Flow Probes", 2nd International Site Characterization Conference, Porto, Portugal, September 21, 2004.
"Role of Initial Specimen State and Particle Properties to the Breakage Potential of Granular Soils", Geo-Quebec Conference, Quebec City, Canada, October 25, 2004.
"Pore Pressure Characterization of Geotechnical Site Using Multi-Level Vibrating Wire Piezometers", Geo-Quebec Conference, Quebec City, Canada, October 27, 2004.
"Interface Critical State Measurements from Microscale PIV Analysis", NSF-EPSRC Workshop on Micro-Geomechanics Across Multiple Strain Scales, Cambridge, UK, March 21, 2005.
"Considerations in Determining the Remoulded Undrained Shear Strength from Full Flow Penetrometer Cycling", International Symposium on Frontiers in Offshore Geotechnics, Perth, Australia, September 21, 2005.
"Biologically Induced Improvement of Loose Sand", 8th National Conference on Earthquake Engineering, San Francisco, CA, April 21, 2006.
Convocation Speaker
"The Story We Find Ourselves In", University of Massachusetts Amherst, College of Engineering Graduation Faculty Speech, May 21, 2006.
Invited Presentations
"Improving CPT Based Pile Design Methods Through the Direct In-Situ Measurement of Interface Strength", American Society of Civil Engineers, Deep Foundations Short Course, Atlanta, GA, January 22, 2000.
"Investigation and Assessment of Interface Mechanisms in Geotechnical Engineering", GeoDelft, Delft, Netherlands, June, 16, 2000.
"Investigation of Particulate-Continuum Interface Mechanisms and Their Assessment Through a Multi-Friction Sleeve Penetrometer Attachment", University of Massachusetts, Amherst, Amherst, Massachusetts, April 26, 2001
"Laboratory and Field Investigations of Factors Affecting Interface Strength", Center for Offshore Foundation Systems, University of Western Australia, Perth, Australia, September 7, 2001.
"A New Multi-Friction Sleeve Penetrometer", University of Christchurch, Christchurch, New Zealand, December 3, 2001.
"Interface Load Transfer Degradation During Cyclic Loading", Northeastern University, March 28, 2003.
"Interface Load Transfer Degradation During Cyclic Loading", Massachusetts Institute of Technology, April 8, 2003.
"In Situ Detection of Stratigraphic Variations Using a Miniature Piezoprobe", University of California Davis, January 5, 2004.
"Multi-Scale Characterization and Analysis of Soil-Structure Interfaces", University of California Davis, April 4, 2005.
"Multi-Scale Characterization and Analysis of Soil-Structure Interfaces", University of California Davis, November 15, 2006.
Conference Session Moderator / Organizer
DeJong, J.T. (2005) "Field Methods for Detection of Stratigraphic Interfaces and Thin Layers", American Society of Civil Engineers, Geotechnical Special Publication, for the American Society of Civil Engineers, Geo-Institute, Geo-Frontiers 2005 Austin Conference
DeJong, J.T. and McDowell, G. (2005) "Session II: MicroGeomechanics from the Millistrain Perspective", NSF-EPSRC Workshop on Micro-Geomechanics Across Multiple Strain Scales, Cambridge, UK, March 21, 2005.
DeJong, J.T. (2006) Session on Dynamic Soil Properties, 8th National Conference on Earthquake Engineering, San Francisco, CA, April 19, 2006.
Conference Organizer
Organizing Committee - Technical Co-Chair, Program Co-Chair, Short Course, Workshop and Debate Chair, (2006) Geotechnical Engineering in the Information Technology Age, GeoCongress Atlanta 2006, February 26 – March 1, 2006.