Mr  Seyed Amir Tabatabaei  will defend His ph.d dissertation with the title of “ Investigation of sand columns effect on stability of railway embankments overlaid on liquefiable foundations”  on 1/Octo/2019  at 8:00 AM , VIP hall of School of Railway Engineering. The advising professor is professor Javad Sadeghi and Morteza Esmaeili.