List of Articles risk level Open Access Article Abstract Page Full-Text 1 - Determining of optimal risk level and optimal structure of capital based on logarithmic model of Border Operational Efficiency in Banks mir hamid sadat salmasi iman dadashi hasmidreza gholamnia roshan Open Access Article Abstract Page Full-Text 2 - Examining the Ergonomic Aspects of Sports Equipment Located in Open Spaces and Urban Parks with a Risk Management Approach Maryam Safdari Bagher Morsal Seyed Mostafa Tayebisani Sosan Sahami