List of Articles Discrete element method Open Access Article Abstract Page Full-Text 1 - Stability analysis and numerical modelling of toppling failure of discontinuous rock slope (A Case study) Shahrzad Nikoobakht Mohammad Azarafza Open Access Article Abstract Page Full-Text 2 - Seismic Reliability of Stone Arch Bridges Considering the Uncertainty of Material Properties Based on the Response Surface Method ََAmirhossein Mehrbod Farhad Behnamfar Armin Aziminejad Hamid Hashemol-Hosseini