S.S. Nanda, PhD, is an Assistant Professor at Myongji University, South Korea. He earned a PhD in bionanotechnology at Gachon University.Jitendra Pal Singh, PhD, is a Professor in the Department of Sciences (Physics), Manav Rachna University, Faridabad, Haryana, India. He earned a PhD at Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand.Sanjeev Gautam, PhD, leads the Advanced Functional Materials Laboratory at the Dr. S.S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh, India. He earned a PhD in condensed matter physics at the Centre of Advanced Study in Physics, Panjab University.Dong Kee Yi, PhD, is a Professor in the Department of Chemistry, Myongji University, South Korea. He earned a PhD in materials science and engineering at the Gwangju Institute of Science and Technology, South Korea.

• 1. Overview of Calcium-Based Materials. 2. Calcium Phosphate. 3. Calcium-Based Magnetic Biochars. 4. Calcium-Based Metal-Organic Frameworks. 5. Calcium-Based Hydroxide. 6. Calcium Oxide. 7. Environment Application of Natural Materials. 8. X-ray Absorption Spectroscopy of Calcium-Based Natural Materials. 9. Calcium-Based Waste Material for Catalysis. 10. Integration of IoT and AI in Bioengineering of Natural Materials.