List of Articles Markov Model Open Access Article Abstract Page Full-Text 1 - An availability-based design optimization by using a fuzzy goal programming approach zahra sobhani mahmoud Shahrokhi Alain bernard Open Access Article Abstract Page Full-Text 2 - Forecasting time and place of earthquakes using a Semi-Markov model (with case study in Tehran province) Ramin Sadeghian Open Access Article Abstract Page Full-Text 3 - Bi-product inventory planning in a three-echelon supply chain with backordering, Poisson demand, and limited warehouse space Maryam Alimardani Fariborz Jolai Hamed Rafiei