United Technologies (1987); University of Rochester (1988); Syracuse University (1988); New Jersey Institute of Technology (1988); University of Hartford (1989, 1994); NASA Glen Research Center (1989,1990); University of Rhode Island (1989, 1993, 1997, 2000); University of Windsor (1990); USAF Phillips Lab (1991); Polytechnic University (1993); Boston University (1993); Stevens Institute of Technology (1995, 2003); Rutgers University (1997); The Pennsylvania State University (1998); University of New Haven (1999); Purdue University (2000); University of New Hampshire (2000); County College of Morris (2001); Fairleigh Dickinson University (2001); University of Maine at Orono (2001); Northeastern University (2002); Two at North Carolina State University (2003); University of Vermont (2004); Arkansas State University (2006, 2007); Arkansas Tech University (2006, 2007); John Brown University (2006, 2007); Oral Roberts University (2007, 2009).