1. "Optically
Activated
Photoconductive Switches: Basic Physics, the 'Lock-on'Effect,
and Some
Recent Theoretical Work," Center
for Solid State Electronics &
Department of Electrical Engineering, Arizona State University, Tempe,
AZ, January
28,
2000.
2."Molecular
Dynamics Study of
Defect Properties of Semiconductors," Department
of Physics, University of Texas-El Paso, El
Paso,
TX, February
2, 2000.
3. "Optically
Activated
Photoconductive Switches: Basic Physics, the 'Lock-on'
Effect, and Some
Recent Theoretical Work," Department of Physics & Center for Solid
State
Science, Arizona State University, Tempe, AZ, March 3, 2000.
4."Optically
Activated
Photoconductive Switches: Basic Physics, the 'Lock-on' Effect,
and Some
Recent Theoretical Work," Departments of Electrical
Engineering,
Materials Science, & Physics, University of Southern California,
Los
Angeles, CA, April
19, 2000.
5. "Structural,
Electronic,
and Vibrational Properties of Some Clathrate Materials," Department
of
Physics, Texas Tech University, Lubbock, TX, November 16, 2000.
6. "Clathrate
Materials:'New',
Open Framework, Crystalline Phases of the Group IV Elements,"Department
of Physics, University of Texas-Arlington,
Arlington, TX, October
17, 2001.
7. "Optically
Activated Photoconductive Switches: Basic
Physics, the 'Lock-on' Effect, and Some
Recent Theoretical Work," Department of Physics, Texas Tech
University, Lubbock,
TX,November
15, 2001
8. "Clathrate
Materials:'New',
Open Framework, Crystalline Phases of the Group IV Elements,"Department of Physics, University of Missouri-Rolla, Rolla,
MO, February
7,
2002.
9. "Optically
Activated Photoconductive Switches: Basic Physics, the 'Lock-on'
Effect, and Some
Recent Theoretical Work,"
Department of Physics, University
of
Missouri-Columbia, Columbia, MO, February 11, 2002.
10."Rattling
Atoms in Clathrate
Semiconductor Materials,"Department
of Physics, Texas Tech
University,
Lubbock, TX, March
13, 2003.
11. "Rattling Atoms in
Group
IV Clathrate Materials,"Department of Physics, Auburn
University,
Auburn, AL, April
4, 2003.
12. "Rattling'Guest'Atoms
in
Group IV Clathrate Materials,"
Department of Physics, University of South Florida,
Tampa, FL, August
22, 2003.
13. "Clathrate Semiconductors: “Novel
Crystalline Phases of the Group IV Elements," Department
of Physics, University of North Texas, Denton, TX, April 19, 2005.
14. "The
Clathrates: Novel Crystalline Phases of the Group IV Elements," Department
of Physics, University of New Mexico, Albuquerque, NM, April 20, 2006.
15. "The Clathrates:
Novel Crystalline Phases of the Group IV Elements,"
Department
of Physics, Texas Tech University, Lubbock, TX, February 22, 2007.
16. "Rattling
Atoms and Chemical Bonding Group IV Clathrates," Department
of Chemistry and Biochemistry, Texas Tech
University, Lubbock, TX, April 4, 2008.
17."The
Clathrates: Novel Crystalline Phases of the Group IV Elements," Department
of Physics, University of Texas-El Paso, El Paso, November 19, 2008.