Gorden Research Conference on Liquid Crystals, June 19-24, 2007,Colby-Sawyer College, New London, New Hampshire, USA.
Ferroelectric Phenomena in Liquid Crystals , 2007 , held at Liquid Crystal Institute(LCI), Kent State University (KSU), organized by LCI and Department of Mathematical Sciences , KSU , Kent , Ohio , USA .
21st International Liquid Crystal Conference , July 2-7,2006, Keystone , Colorado , USA .
Sharing Conservation Science, June 8 – July 6, 2001, organized by ICCROM (The International Centre for The Study of The Preservation and Restoration of Cultural Property) held at Paris , FRANCE.
"Earthquake-Safe: Lessons To Be Learned From Traditional Construction " International Conference on the Seismic Performance of Traditional Buildings, November 16-18, 2000, Istanbul , TURKEY .
" Culture, Heritage Management & Tourism" A UNESCO conference /workshop for the enhancement of stakeholder cooperation in Asia and the Pacific, April 8 – 16 ,2000 , held at Bhaktapur Municipality, NEPAL.
ICTP-UNU-Microprocessor Laboratory Fifth Course on Basic VLSI Design Techniques, 9 Nov-4 Dec 1998, organized by ICTP, Trieste , ITALY .
Fifth College on Microprocessor-Based Real-Time Systems in Physics, 12 Oct - 6Nov 1998, organized by ICTP (the Abdu Salam International Centre for Theoretical Physics), Trieste , ITALY .
Workshop on Instrumentation and Research Methodology, 30 June – 9 July 1996, organized by Central Department of Physics and NPS held at Central Department of Physics T.U., Kirtipur, and Kathmandu , NEPAL
11 th National Symposium on Radiation Physics, 26 – 29 Oct, 1995 , held in Punjabi University Patiala, Punjab , India and jointly organized by Physics Dept. of Punjabi University, Patiala and Indian Society for Radiation Physics, INDIA .
10 th Symposium on Science and Technology of Plasma, 16-19th Oct.1995, held in Banaras Hindu University and organized by Physics Department of Banaras Hindu University, Varanasi , INDIA .
Second National Conference on Science and Technology, June 8 ,1994 , organized by Royal Nepal Academy of Science and Technology (RONAST), Kathmandu NEPAL.
Workshop on Physics Teaching at School & Higher Secondary Level , held in Bharatpur Multiple Campus on the occasion of 13 th Annual Convention of Nepal Physical Society, NEPAL .