Preface Chapter 1: Functional and Special Materials Rapid and Visual Detection of Vitamin C Based on Sodium Citrate-Stabilized Silver Nanoparticles Preparation of Polycurcumin-Modified Graphite Electrode via Electropolymerization and its Application for Determining Cd2+ Performance Optimization of Supercapbattery with Porous Modification on Silicon as Anode and Cathode Based on Al2O3/CuCrO2 Silver Nanowires (AgNWs) Post-Treatment Effect in Application of Flexible Transparent and Conductive Electrodes: A Mini Review Physical and Optical Properties of CeF3 Doped with Aluminium Fluorophosphate Glasses Chapter 2: Waste Treatment and Biomass Processing Catalytic Pyrolysis of Biomass Waste Mixture over Activated Carbon and Zeolite Catalyst for the Production Bio Oil Pyrolytic Plastic Oil Distillation Study of Five Mixed Plastic Waste Pyrolysis The Effect of Drying Temperature Variation on the Production of Porang Starch Bioplastics with Sorbitol Plasticizer on Mechanical and Thermal Properties Chapter 3: Structural Materials Study of Sensitization in Gas Tungsten Arc Welded 304 Stainless Steel Joints Using 308L Filler Metal Effect of Heat Treatment Process on the Microstructure and Hardness of Train Wheel Material Review of the Physical Properties of CLC Lightweight Concrete Using the Addition of Red Sand from Labuhan Batu Selatan Chapter 4: Data Processing and Computational Research in Geology and Geophysics The Effect of Earthquake Vibration on the Deformation of the Steel Structure of a Special Moment Frame System Landslide Mapping from the Cylcone Seroja in Kupang City Using Remote Sensing Hypocenter Relocation Using Fast Marching Method (FMM) in Tarutung Analysis DEM and Geological Observation Data for Study of the Potential Landslide National Street for Jantho - Lamno Optimizing the Gravity Data and Geological Observation for Mapping the Local Fault around the Jaboi Volcano Convex Relaxation for Solving Polynomial Programs through Quadratization Technique.