Selected peer-reviewed full text papers from the 5th International Conference on Science and Technology Applications (ICoSTA 2023) Selected peer-reviewed full text papers from the 5th International Conference on Science and Technology Applications (ICoSTA 2023), November 02, 2023, virtual

PrefaceChapter 1: Structural MaterialsStudy of Sensitization in Gas Tungsten Arc Welded 304 Stainless Steel Joints Using 308L Filler MetalEffect of Heat Treatment Process on the Microstructure and Hardness of Train Wheel MaterialReview of the Physical Properties of CLC Lightweight Concrete Using the Addition of Red Sand from Labuhan Batu SelatanChapter 2: Earthquake Resistance Planning and Computational Research in GeophysicsThe Effect of Earthquake Vibration on the Deformation of the Steel Structure of a Special Moment Frame SystemLandslide Mapping from the Cylcone Seroja in Kupang City Using Remote SensingHypocenter Relocation Using Fast Marching Method (FMM) in TarutungAnalysis DEM and Geological Observation Data for Study of the Potential Landslide National Street for Jantho - LamnoOptimizing the Gravity Data and Geological Observation for Mapping the Local Fault around the Jaboi VolcanoConvex Relaxation for Solving Polynomial Programs through Quadratization Technique