TACOM, Warren Michigan, US Army TARDEC University, May 8, 2008.

Universiti Putra Malaysia, Department of Computer and Communications, organized by the IEEE Communications Society, Saturday January 5, 2008.

Electrical and Electronics Engineering Department, Nanyang Technological University, Singapore, September 11, 2007.

Computer Science Department, Yuan Ze University, Taiwan, September 14, 2007.

Division of Electrical and Electronic Engineering, Kwangwon National University, Chuncheon, Knangwon, 200-701, Republic of Korea, Wednesday, June 20, 2007.

Department of Computer Science and Engineering, Pohang University of Science and Technology (Postech), San31 Hyoja-Dong, Nam-Gu, Pohang, Kyungbuk, 790-784, Republic of Korea, Tuesday, June 19, 2007.

Sangju National University, Department of Computer Engineering, 386 Gajangdong Sangju-city, 742-711 Republic of Korea, Monday, June 18, 2007.

ERTI, 161 Gajeong-dong, Yuseong-gu, Daejeon, 305-700, Rep. of Korea, Thursday, June 14, 2007.

Myongji University, Department of Computer Science & Computer Engineering, San 38-2 Namdong, Yongin, Kyunggido, 449-728, Republic of Korea, Friday, June 8, 2007.

Sogang University, Department of Computer Science & Engineering, Sinsu-Dong, Mapo-Gu, Seoul 121-742, Republic of Korea, Saturday, June 2, 2007.

Carnegie Mellon University, Center for Wireless and Broadband Networking, Thursday, March 22, 2007.

Carnegie Mellon University, Center for Sensed Critical Infrastructure Research, Wednesday, March 21, 2007.

Bhabha Atomic Research Center, Mumbai, India, Thursday Dec. 28, 2006.

Nuclear Power Corporation of India Limited, Anusaktinagar, Mumbai, India, Thursday Dec. 28, 2006.

IEEE Tivandrum Section, India, Tuesday Dec. 26, 2006.

IEEE Communications Society Section, New Delhi, India, Saturday, Dec. 16, 2006.
Carnegie Mellon University, Center for Wireless and Broadband Networking, Friday, Dec. 1, 2006.

Ohio State University, Columbus, Distinguished Lecture, November 9, 2006

Bosch Corporation, Pittsburgh, Sept. 20, 2006.

Tsinghua University, Department of Computer Science and Technology, Aug. 4, 2006.

Shanghai Jiao Tong University, Department of Computer Science and Engineering, July 29, 2006.

The Honk Kong University of Science and Technology, July 26, 2006.

Chung Yuan Christian University, Chung Li, Taiwan, June 14, 2006.

National Taipei University of Technology, Taipei, Taiwan, June 13, 2006.

National Taiwan University of Science and Technology, Taipei, Taiwan, June 13, 2006.

Natonal Chiao Tung University, Hsin-Chu, Taiwan, June 12, 2006.

Yuan Ze University, Chuangli, Taiwan, June 9, 2006.

National Central University, June 7, 2006.

Invited Talk, Motorola Inc., Champaign, April 14, 2006.

Invited Distinguished Talk, The University of Akron, Feb. 16, 2006.

Invited Talk, Indira Ghandhi Centre for Atomic Research, Kalpakkam, Dec. 15, 2005.

Invited Talk, Indian Institute of Technology, Chennai, Dec. 14, 2005.

Invited Talk, Indian Institute of Technology, Kanpur, Dec. 13, 2005.

Invited Talk, Indian Institute of Technology, Gawhauti, Dec. 10, 2005.

Invited Talk, Assam University, Silcher, Dec. 8, 2005.

Invited Talk, Indian Institute of Technology, Roorkee, Dec. 5, 2005.

Invited Talks (2), Philips Research, Briarcliff Manor, NY, Aug. 11, 2005.

Invited Talk, Motorola Research Labs, USA, Plantation, FL, June 24, 2005.

Invited Talk, Florida Atlantic University, Boca Raton, FL, June 24, 2005.

Invited Talk, Science and Technology Lecture Series, University of Minnesota, April 28, 2005.

Ravishankar University, Raipur, Chattisgarh, India, Dec. 20, 2004.

International Institute of Information Technology, Pimpri, Pune, India, Dec. 10, 2004.

Center for Development of Advanced Computing, Pune University Campus, Pune, India, Dec. 10, 2004.

Axes Technologies (I) Pvt. Ltd., Bangalore, India, Dec. 9, 2004.

Indian Institute of Technology, Mumbai, Dec. 8, 2004.

Bhabha Atomic Research Center, Trombay, Mumbai, India, Dec. 7, 2004.

Tata Institute of Fundamental Research, Mumbai, India, Dec. 6, 2004.

Invited talk at SUNY Stony Brook, CEWIT 2004: Business without Boundaries at Crest Hollow Country Club at Woodbury, Nov. 9, 2004, .

Army Research Laboratory, Aberdeen Proving Ground, MD, Sept. 22, 2004.

TACOM, Warren, MI, May 19, 2004.

Lucent Technologies, SPS Department Education Council, Columbus, Ohio, March 26, 2004.

Purdue University, Center for Wireless Systems and Applications, March 23, 2004.

Microsoft Research, Seattle, WA, March 23, 2004, Feb. 13, 2004,

Indian Institute of Technology, New Delhi and IBM India, New Delhi, Dec. 29, 2003.

Indian Institute of Technology, Roorkee, Dec. 26, 2003.

Shri Sant Gajanan Maharaj College of Engineering, Shegaon, MS, India, Dec. 16, 203.

University of Illinois at Chicago, Nov. 24, 2003.

University of Texas at Austin, Nov. 7, 2003.

Kent State University, Kent, OH, Sept. 12, 2003, Distinguished Speaker series.

Air Force Institute of Technology, Dayton, Sept. 10, 2003.

UCLA Wireless Internet and Data Enterprise Applications, Los Angeles, CA, May 20, 2003.

Sun Microsystems, San Jose, CA, May 12, 2003.

Robert Bosch Research and Technology Center, Palo Alto, CA, May 12, 2003.

DoCoMo, San Jose, CA, May 9, 2003.

IEEE Chapter of Cincinnati, March 27, 2003.

University of Louisiana, Lafayelle, March 17, 2003.

Ohio University, Athens, OH, Oct. 25, 2002.

Pennsylvania State University, Department of Computer Science and Engineering, Sept. 23, 2002.

University of Maryland, Electrical & Computer Engineering, May 22, 2001.

Internet2 Technology Evaluation Center, Ohio, Windows of the Future meeting, Columbus, Ohio, March 29, 2001.

University of Kentucky, Department of Computer Science, Lexington, KY, April 20, 2000.

University of Illinois, Urbana-Champaign, IL, Computer Systems Research Laboratory, March 31, 2000.

Army Research Laboratory, Adelphi, MD, Oct. 21, 1999.

Space and Ballistic Missile Defense Command, Huntsville, AL, May 7, 1999.

University of Cincinnati, IEEE Students Chapter, Cincinnati, OH Spring 1999.

University of Cincinnati, Networking Group Seminar Series, Cincinnati, OH Spring 1999.

Mohawk Valley Chapter of the IEEE Computer Society and Rome-Utica ACM, Rome, NY Nov. 12, 1998.

University of Cincinnati, Theoretical Computing Seminar Series, Cincinnati, Ohio, Nov. 9, 1998.

University of Kansas, Lawrence, KS April 9, 1998.

University of Missouri, Rolla, MO April 7, 1998.

Virginia Polytechnic and State University, Blacksburg, VA, March 30, 1998.

University of Cincinnati, Cincinnati, Ohio, March 5, 1998.

Chung Buk National University, Chungbuk, Korea, Dec. 12, 1997.

Sogang University, Seoul, Korea, Dec. 11, 1997.

Case Western Reserve University, Cleveland, OH, May 19, 1997.

University of Southwestern Louisiana, Lafayette, LA, (Distinguished Lecture Series), April 16, 1997.

Washington University, Saint Louis, MO, April 1, 1997.

University of Kentucky, Lexington, KY, Feb. 24, 1997.

The Hong Kong University of Science & Technology, Hong Kong, Dec. 18, 1996.

NEC Research Institute, Princeton, NJ, Sept. 30, 1996.

Wayne State University, Detroit, MI, Sept. 12, 1996.

University of Texas at Dallas, Richardson, TX, Aug. 8, 1996.

University of Cincinnati, Cincinnati, OH, July 17, 1996.

Southern Methodist University, Dallas, TX, June 3, 1996.

Florida Atlantic University, Boca Raton, FL, May 28, 1996.

Elon College, Burlington, NC, April 16, 1996.

Tata Institute of Fundamental Research, Bombay, India, Jan. 9, 1996.

University of Roorkee, Roorkee, India, Dec. 23, 1995.

University of Texas, Austin, TX, Oct. 27, 1995.

U. S. Army Research Laboratory, Aberdeen Proving Ground, MD, Sept. 27, 1995.

University of Alabama, Huntsville, AL, May 8, 1995.

University of Roorkee, Roorkee, India, July 11, 1994.

Government Engineering College, Bilaspur, India, June 24, 1994.

University of Houston, Houston, TX, May 16, 1994.

University of South Carolina, Columbia, SC, May 13, 1994.

Fujitsu Network Switching of America, Inc., Raleigh, NC, March 10, 1994.

Army Research Laboratory, Fort Monmouth, NJ, 3 lectures on Feb. 7, 1994.

Mississippi State University, Starkville, MS, Oct. 20, 1993.

University of Alabama, Tuscaloosa, AL, Oct. 19, 1993.

University of South Alabama, Mobile, AL, Oct. 18, 1993.

University of Nevada, Las Vegas, ND, April 30, 1993.

University of Arkansas, Fayetteville, AK, April 12, 1993.

University of Louisville, Louisville, KY, April 8, 1993

Texas A & M University, College Station, TX, Dec. 15, 1992.

IBM Corporation, Research Triangle Park, NC, July 21, 1992.

Tata Institute of Fundamental Research, Bombay, India, May 26, 1992.

National Technological Institute, Singapore, May 25, 1992.

IBM Corporation, Research Triangle Park, NC, Dec. 13, 1991.

Indian Institute of Technology, New Delhi, India, 7 lectures, July 30- Aug. 5, 1991.

University of Roorkee, Roorkee, India, July 27, 1991.

Benaras Hindu University, Varanasi, India, 2 lectures, July 24-25, 1991.

Indian Statistical Institute, Calcutta, India, 6 lectures during July 10-22, 1991.

Jadavpur University, Calcutta, India, 2 lectures, July 20, 1991.

Computer Society of India, Calcutta, India, July 19, 1991.

Center for Development of Advanced Computers, Pune, India, June 28, 1991.

Center for Development of Advanced Computers, Bangalore, India, 5 lectures during June 18-25, 1991.

Bharat Electronics, Central Research Laboratory, Bangalore, India, June 26, 1991.

Institute of Engineers, Karnataka State Center, Bangalore, India, June 21, 1991.

University of Roorkee, Roorkee, India, Jan. 4, 1991.

Tata Institute of Fundamental Research, Bombay, India, Dec. 7, 1990.

U. S. Army Strategic Defense Command, Huntsville, AL, Oct. 24, 1989.

AT&T Bell Laboratories, Holmdel, NJ, Aug. 18, 1989.

U. S. Army Electronics Technology & Devices Lab., Fort Monmouth, NJ, Aug. 17, 1989.

Wright State University, Dayton, OH, March 10, 1989.

University of Kentucky, Lexington, KY, March 6, 1989.

Naval Postgraduate School, Monterey, CA, March 2, 1989.

Federal Institute of Technology, Lausanne, Switzerland, Aug. 29, 1988.

Tata Burroughs Consulting Co, Bombay, India, Aug. 23, 1988.

Tata Institute of Fundamental Research, Bombay, India, a series of 9 lectures on Parallel Processing during May 17 to Aug. 11, 1988.

Indian Institute of Technology, Powaii, Bombay, India, a series of 9 lectures on Parallel Processing, Aug. 1-5, 1988.

University of Rajasthan, Jaipur, India, July 23 and 26, 1988.

University of Roorkee, Roorkee, India, July 21, 1988.

Center for Development of Telemetrics, New Delhi, India, July 19, 1988.

I I T Bombay, India, Workshop on Parallel Processing, July 8, 1988.

Indian Institute of Science Bangalore, Bangalore, India, June 15, 1988.

Center for Development of Telemetrics, Bangalore, India, June 14, 1988.

Defense Research & Development Laboratory, Anurag, Hyderabad, India, June 6, 1988.

Army Institute for Research in Management, Information, Communications, and Computer Science, Atlanta, GA, a series of lectures on Distributed Processing during Jan.-April, 1988.

Bell Northern Research, Research Triangle Park, NC, Oct. 30, 1987.

Digital Equipment Corporation, Boxborough, MA, Oct. 23, 1987.

US Army Institute for Research in Management, Information, Communications, and Computer Science (AIRMICCS), Atlanta, GA, Oct. 2, 1987.

Southern Methodist University, Dallas, TX, April 3, 1987.

Syracuse University, Syracuse, NY, March 2, 1987.

NASA Langley Research Center, Hampton, VA, Feb. 11, 1987.

University of Southwestern Louisiana, Lafayette, LA, April 11, 1986.

George Washington University, Washington, DC, Sept. 25, 1985.

Sperry Corporation, Reston, VA, May 9, 1985.

University of Central Florida, Orlando, FL, May 9, 1985.

University of South Florida, Tampa, FL, April 5, 1985.

Microelectronics and Computer Technology Corporation (MCC), Austin, TX, March 19, 1985.

Microelectronics Center of North Carolina, Research Triangle Park, Inc. Semi-annual Research Review, Oct. 23, 1984.

Invited talk, IBM Corporation, Research Center, T. J. Watson Research Center, Yorktown Heights, NY, Aug. 7, 1984

Invited talk, Duke University, Durham, NC, Nov. 1983

Northwestern University, Evanston, IL, Nov. 10,1983

Invited talk, University of South Carolina, Columbia, SC, March 23, 1983

Invited talk, State University of New York, Stony Brook, NY, March 16, 1981

Invited talk, University of Roorkee, Roorkee, India, July 28, 1980

Invited talk, University of California, Santa Barbara, CA, Feb. 29, 1980

Invited technical talk on Computer Arithmetic, Virginia Polytechnic and State University, Blacksburg, VA Nov. 24, 1975