This collection honoring Professor Jiann-Yang Hwang focuses on characterization and processing development in minerals, metals, and materials. Topics include but are not limited to:. Characterization methodology of minerals, metals, and materials. Microwave-assisted material processes. Recycling and reuse of metallurgical byproducts. Materials for hydrogen storage. Wastewater treatment and environmental protection. Natural materials for value-added applications. Principles and interactions of material characterization and manufacturing processing