Preface Chapter 1: Structural Metals Processing Parameter Design of Sand Casting to Minimize Shrinkage Defects, Porosity Defects and Incomplete Defects Hardness and Microstructure of TiN Coating on Aluminum Alloy with DC Sputtering Optimizing Micro Friction Stir Spot Welding (mFSSW) of Aluminum Alloy AA1100 Using Neural Network Model The Effect of Friction Stir Weld (FSW) Process Parameters on Tensile Strength, Macro Structure, and Hardness in Results of AA7075 Butt Joints Optimizing Aluminum Melting with Sustainable Biomass Fuels: A Case Study of Ulin ( Eusideroxylon zwageri ) Wood and Galam ( Melaleuca cajuputi ) Wood Chapter 2: Corrosion The Effect of Solution Treatment Temperature on Hardness, Microstructure, and Corrosion Resistance of Ti-6Al-4V ELI Bee Wax Propolis Extract as Zinc Corrosion Inhibitor in 3.5% NaOH Chapter 3: Polymers and Composites Incorporating Graphene Nanofiller for the Improvement of Hydrophobic Properties of Cassava Peel Starch Bioplastic The Effect of Bleaching Variation on Schoutenia Ovata Korth Fiber as a Composite Reinforcement Microcrystalline Cellulose as Composite Reinforcement: Assessment and Future Prospects Effect of Silanized Zirconium Oxide (ZrO2) Filler on Hardness of Acrylic-Based Denture Teeth Chapter 4: Functional Materials Preparation and Characterization of Nickel Ferrite (NiFe2O4) Nanoparticles by Surfactant-Free Electrochemical Method The Effect of Modified Material in Screen-Printed Carbon Electrode for Oxalic Acid Detection Chapter 5: Materials and Technologies of Chemical and Environmental Engineering Effect of Sulfonating Agent on Esterification Reaction Using Aerogel Carbon Based Support Material Utilization of Adsorbent Based on Rice Straw ( Oryza sativa ) for Cr(VI) Ions Reduction in Aqueous Solutions Bilayer Solar Steam Generator by Co-Gelation Method Effect of Doping ZnO on Activated Carbon Prepared from Waste Paper for Photocatalytic Applications Highly Porous Ni Electrode Decorated with Fe3O4for Oxygen Evolution Reaction(OER) Chapter 6: Design Machines, Machine Parts and Equipment Simulation of Stress Intensity Factor and J-Integral on UIC 54 Railway Failure Using A Fracture Mechanics Approach The Behavior of Thin-Walled Cylinders with Ribs Regarding the Energy Absorption Capability on High-Velocity Impact Topology Optimization of Motorbike Footsteps Using Finite Element Method Analytical Prediction of Crushing Thin-Walled Square Tube with Static Axial Loads Using Elliptical Holes as Crush Initiators A Bibliometric Analysis of Suspension System Development for Enhancing Comfort in Family Passenger Vehicles Muffler Design for Noise Reduction and Pressure Loss Optimization Using Multiobjective Genetic Algorithm Development of Savonius Rotor Based on Bezier Curve for Vertical Axis Marine Current Turbine at Sunda Strait, Hindia Ocean The Effect of Deflector Angle on the Performance of Turbine Combination Darrieus-Savonius.