Workshops Training Seminar on "Laboratory Management System in accordance with ISO 17025:2005 series", RWTUF, Tehran, Iran, 16 July 2005. Training Seminar on "Establishing and Implementation of Quality Management System in accordance with ISO 9000:2000 series", RWTUF, Tehran, Iran, 28 November 2004. Working Party on "Initiation and Growth of Cracks in Materials," The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy, 4-13 June, 1991 . Spring College on Materials Science on "Nucleation, Growth and Segregation in Materials Science and Engineering", The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy, 6 May-7 June, 1991 .