List of Articles Open Access Article Abstract Page Full-Text 1 - Method of Evaluation of Efficiency Improvement Potential for District Heating Systems with Focus on Variable Speed Centrifugal Pumps Egils Dzelzitis Deniss Pilscikovs Open Access Article Abstract Page Full-Text 2 - Optimizing Rheological Behavior of Steel Feedstocks in Advanced Process of Alloying Powder Injection Molding حمید خورسند مژده فتحی دوست Open Access Article Abstract Page Full-Text 3 - Effect of HPT and CGP Processes on the Copper Me-chanical Properties ش. جعفرزاده H. Bisad ه. میانجی ع. زینعلی Open Access Article Abstract Page Full-Text 4 - Stress Field Analysis of V-Notches with Tip Cracks in a Polymer Material Using Digital Image Correlation ن. سلطانی م.ر. یادگاری ا. اشراقی Open Access Article Abstract Page Full-Text 5 - Comparison of Compressive Properties Between Va-cuum Infusion and Hand Lay-Up Method Toward Bal-sa Core Sandwich Composites م. نجفی ر. اسلامی فارسانی سید محمدرضا خلیلی Open Access Article Abstract Page Full-Text 6 - Load Controlled Fatigue of AZ31B E. کلاته مولایی ح. جاهد Open Access Article Abstract Page Full-Text 7 - Determination of Tensile Strength and Crack Growth of a Typical Polymer Concrete Using Circular Disc Samples م.ر.م علیها م. حیدری رارانی م.م. شکریه م.ر آیت اللهی Open Access Article Abstract Page Full-Text 8 - Characterization of Oxide Film Formed on Ck45 Steel by Plasma Electrolytic Oxidation Method S. Abuali Galedari م. موسوی خوئی