List of Articles Design of experiments (DOE) Open Access Article Abstract Page Full-Text 1 - RSM in Analysis of Energy Absorption of thin-walled conical groove tubes filled with polyurethane foam بتول سرکبیری علی جهان محمد جواد رضوانی Open Access Article Abstract Page Full-Text 2 - Investigation of energy absorption in shock absorbers of grooved circular using response surface شیما شهروی محمد جواد رضوانی علی جهان Open Access Article Abstract Page Full-Text 3 - A Taguchi approach on optimal process control parameters for HDPE pipe extrusion process G. V. S. S . Sharma R. Umamaheswara Rao P. Srinivasa Rao