List of Articles Open Access Article Abstract Page Full-Text 1 - Maximizing First Natural Frequency Of 2D Structures Using Bee Colony Optimization (BCO) and fuzzy logic esmail delfani ahmad delfani a ghoddosian Open Access Article Abstract Page Full-Text 2 - A Novel Study of Penetration into Concrete Targets by Ogive Nose Projectiles Ahmad Khoogar Mohamad Mohades Khodadad Vahedi Open Access Article Abstract Page Full-Text 3 - Study of Skin Friction in Channels by Lattice Boltzmann Method Ahad Zarghami Negar Ahmadi Open Access Article Abstract Page Full-Text 4 - Comparison of performances of air standard Atkinson, Diesel and Otto cycles with constant specific heats Alireza Hajipour Open Access Article Abstract Page Full-Text 5 - Design and Analysis of a New Dental Implant using Finite Element Method Sadegh Rahmati Hossein Kheirollahi Abbas Azari Open Access Article Abstract Page Full-Text 6 - Investigation of Variance of Roller Burnishing Parameters on Surface Quality by Taguchi Approach Mohammad Mahdieh Ehsan Rafati Samaneh Kargar Sichani Open Access Article Abstract Page Full-Text 7 - A New Method for Biomodelling and Rapid Prototyping of Human's Hard Tissues as Substituting Prostheses Kasra Karbaschi Open Access Article Abstract Page Full-Text 8 - Investigation of water balance in water recovery of closed steam injection gas turbine cycles Mohsen Ghazikhani Ali Mohammadian Iman Mirzaii Open Access Article Abstract Page Full-Text 9 - Effects of tool material on the machinability of titanium (Grade-5) alloy by using RSM kali Dass Open Access Article Abstract Page Full-Text 10 - Determining the Optimal Size and Operation Sensitivity Analysis of a CCHP System Implemented in a Residential unit in Tehran Adel Gholami Arman Fathi Open Access Article Abstract Page Full-Text 11 - A New Approach for Determining the Optimum Pressure–Time Diagram in Superplastic Forming Process Hamed Sheikhalishahi Mahmoud Farzin Reza Jafari Nedoushan Mohammad Ali Rasouli Masoud Aliheidar Open Access Article Abstract Page Full-Text 12 - Experimental Examination of Intact and CFRP Retrofitted RC Beams under Monotonic and High Cycle Fatigue Loadings Mohammad Zaman Kabir Ata HojjatKashani