List of Articles الگوریتم سیمپل Open Access Article Abstract Page Full-Text 1 - A Primal Simplex Algorithm for Solving Linear Programming Problem with Grey Cost Coefficients S.H. Nasseri A. Yazdani D. Darvishi Salokolaei Open Access Article Abstract Page Full-Text 2 - Natural convection heat transfer analysis of nano-fluid in a F- shaped chamber Abdollah Khalesi Doost Amir Yadolahi Open Access Article Abstract Page Full-Text 3 - The effects of using two compound twisted tapes to enhance the performance of a parabolic trough solar collector mojtaba jamiati Hossein Pourmohamadian