Preface Chapter 1: 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 2: Materials Physics and Computational Materials Science Non-Arrhenius Transport Properties of Glass-Forming Materials in a Wide Temperature Range: A Systematic Study Based on the BSCNF Model Defect and Thickness Optimization of Perovskite for High Efficiency Solar Cells Chapter 3: Materials for Energy Conversion and Storage Devices Low-Temperature Fabrication of Screen-Printed NiO-YSZ Thin Film Anodic Layer on Metal Substrate via Hot-Pressing for Metal-Supported Solid Oxide Fuel Cells Preparation of Electrospun Styrofoam Membranes for Hydrogen Fuel Cells Development and Characterization of Paraffin Wax Based Phase Change Material with Blacksmith Slag Snag Solid-State Synthesis and Characterization of LiNi0.75Co0.20Al0.05O2 Cathodes for Lithium-Ion Battery Applications Direct Regeneration of NMC622 Cathode Material from Spent Ev Li-Ion Batteries via Hydrothermal Relithiation Chapter 4: Heat and Mass Transfer in Engineering Objects Optimum Case Temperature for Appropriate Thermal Resistance to Obtain Minimum Junction Temperature in GaN-On-SiC Power Amplifiers Influence of Fuel Injection Timing and Hydrogen Enrichment on Waste Plastic Oil: Performance, Combustion, and Emissions Analysis Influence of Shape and Bubble Diameter on Marangoni Convection in Gold Nanoparticles Simulation of the Heat Transfer during the Casting Process by Mirror U-Net Models Investigation of Convective Heat Transfer of a Multi-Story Building and its Effect to the Comfort of Residents in Metro Manila.