List of Articles Non-linear vibration Open Access Article Abstract Page Full-Text 1 - Nonlinear Vibration Analysis of the Beam Carrying a Moving Mass Using Modified Homotopy M Poorjamshidian J Sheikhi S Mahjoub-Moghadas M Nakhaie Open Access Article Abstract Page Full-Text 2 - Application of Single Unit Impact Dampers in Protective Systems Aref Afsharfard Mohammad Golmohammadi