3rd Annual National Conference and Seminar of Ancient Sciences and Archaelogical  Society of India, Mysore, 30-31, October 2007.

 9th International Symposium on "Cultural Heritage Symposium in Geosciences, Archaeology, Mining and Metallurgy : Libraries - Archives - Collection)", Laval University, Quebec City, Canada, Septermber 3-7, 2007. (Link)

International Seminar on "History of Science and Technology", 23-26 January 2007, Venue: Senate Hall, Swatantrata Bhawan, Banaras Hindu University.

6th International Conference on the "Beginnings of the Use of Metals and Alloys (BUMA-VI)", Beijing and Anyang, China, September 15-20, 2006.(Link)

INAE Discussion Meeting on Delhi Iron Pillar, March 11, 2005, INSA, New Delhi (Report)