List of Articles Preform Open Access Article Abstract Page Full-Text 1 - Optimum Designing of Forging Preform Die for the H-shaped Parts Using Backward Deformation Method and Neural Networks Algorithm Afshin Naeimi Mohsen Loh Mousavi Ali Eftekhari Open Access Article Abstract Page Full-Text 2 - Investigation of the effect of using titanium dioxide polymer nanocompounds on the packaging characteristics of polyethylene terephthalate beverage containers Majid Khani Mehdi Pordel Abolghasem Davoodnia Afshin Tavasoli Farsheh Open Access Article Abstract Page Full-Text 3 - Effect of activated carbon additive on microstructure and phase composition of reaction bonded boron carbide ceramic Ahmad bayat Omid Mirzaee Hamidreza Baharvandi