List of Articles Slippage Open Access Article Abstract Page Full-Text 1 - Optimal Design of Steppers in Single Step High Pressure Torsion (SIHPT) Process as a Novel SPD Method Mehdi Eskandarzadeh Ghader Faraji A. Masoumi Ali Kalaki Open Access Article Abstract Page Full-Text 2 - climate road (Semnan-Sari) razi mosavi foladi Open Access Article Abstract Page Full-Text 3 - The Effectiveness of Training Self-Encouragement on Cognitive Slippage and Fear of Negative Evaluation Zahra Sohrabi Fariborz Dortaj Esmaeil Sa’dipour