Mr  Jaber Mottahed  will defend His ph.d dissertation with the title of “ Investigation the Effect of Under Sleeper Pad on Dynamic Vibration of Bridge Decks Using Numerical Method and Field Study ”  on 25/June/2019  at 13:30 , amphitheatrr of School of Railway Engineering. The advising professor is professor Jabbar Ali Zakeri and professor Saeed Mohammadzadeh.