List of Articles Open Access Article Abstract Page Full-Text 1 - use natural frequency to diagnose ankylosed teeth zavosh Amini ehsan jamshidi Faezeh Eslamipour Open Access Article Abstract Page Full-Text 2 - The Effect of Polyurethane Mandrels and NBR in the Bending Process of Steel Pipe with using the Numerical Simulation and Experimental Test Seyed Ali Poursayed Rezaee majid jabbari Open Access Article Abstract Page Full-Text 3 - Analytical models presented for the Penetration of metallic targets mohammad farahmand khodadad vahedi alireza nadaf rouholah hoseini Open Access Article Abstract Page Full-Text 4 - Multivariable Optimal Control of Fuel inlet and IGV Parameters of Gas Turbine via PID-PSO Controller in presence of Noise Mojtaba Hasanlu Open Access Article Abstract Page Full-Text 5 - Experimental study of dynamic viscosity of the fluid water-based nanofluids magnesium oxide محمد قویدل سیف الله سعدالدین Open Access Article Abstract Page Full-Text 6 - Drag reducing of Peogeut 405 using the vortex generator. Rouhollah Ghodsi Hamidreza Zomorodi Farhad Emamalizadeh Open Access Article Abstract Page Full-Text 7 - Critical velocity analysis of Fluid-containing Pipe with Non-Classical Boundary Conditions shahrokh shams Sajad Jangravi