主题词：Context-Aware Activity Recognition Systems; Mobile Ad Hoc Networks; Energy Efficient Wireless Sensor Networks; IoT and Edge/Fog Computing; Opportunistic and Delay-Tolerant Networks; Indoor and Outdoor Localization Technologies; Service-Oriented Architecture and Web Services; Caching and Content Delivery; Mobile Agent-Based Network Management; Wireless Networks and Protocols; Energy Harvesting in Wireless Networks; Human Mobility and Location-Based Analysis; Cloud Computing and Resource Management; Network Security and Intrusion Detection; Distributed systems and fault tolerance; User Authentication and Security Systems; Cryptography and Data Security; Vehicular Ad Hoc Networks (VANETs); Cooperative Communication and Network Coding; Peer-to-Peer Network Technologies; Privacy-Preserving Technologies in Data; Anomaly Detection Techniques and Applications; COVID-19 diagnosis using AI; Distributed and Parallel Computing Systems; Data Management and Algorithms