Chapter 1. The study of Cluster Based Energy Efficient Algorithms of Flying Ad-Hoc Networks -- Chapter 2. Current web development technologies: A Comparative Review -- Chapter 3. R-peak based Arrhythmia Detection as an impact of ovid-19 -- Chapter 4. IOT-Based Water Quality Monitoring and Detection System -- Chapter 5. A Comparative Analysis of Different Diagnostic Imaging Modalities -- Chapter 6. Uncovering the Usability Test Methods for Human-Computer Interaction -- Chapter 7. Study of Lipid concentration effects on Blood flow through stenosed tube with permeable walls using Homotopy Perturbation Method -- Chapter 8. Actual Facial Mask Recognition Utilizing YOLOv3 _ R-CNN -- Chapter 9. Real-Time Smart System For Marking Attendance That Uses Image Processing In a Saas Cloud Environment -- Chapter 10. Design of automatic clearance system for emergency transport and abused vehicle recognition -- Chapter 1. Securing Account Hijacking Security Threats in Cloud Environment using Artificial Neural Networks -- Chapter 12. Smart Pillbox And Voice Alert System -- Chapter 13. Early Identification of Plant Diseases by Image Processing using Integrated Development Environment -- Chapter 14. Usability Attributes and their Mapping in various phases of Software Development Life Cycle -- Chapter 15. Controlling Devices From Anywhere Using IOT including Voice Commands. etc.