List of Articles vibration damping Open Access Article Abstract Page Full-Text 1 - A Multi-supplier Inventory Model with Permissible Delay in Payment and Discount M. Farhangi E. Mehdizadeh Open Access Article Abstract Page Full-Text 2 - Developing and Solving two Level Lot Sizing Problem with Multi Production Methods using Vibration Damping Optimization Algorithm Mohammad Ebrahimi Maghsod Amiri Open Access Article Abstract Page Full-Text 3 - Three Metaheuristic Algorithms for Solving the Multi-item Capacitated Lot-sizing Problem with Product Returns and Remanufacturing Esmaeil Mehdizadeh Amir Fatehi Kivi Open Access Article Abstract Page Full-Text 4 - A New Hybrid Algorithm to Optimize Stochastic-fuzzy Capacitated Multi-Facility Location-allocation Problem Esmaeil Mehdizadeh Mohammad Reza Tavarroth Vahid Hajipour