6th Workshop on "5G - Putting Intelligence to the Network Edge" (5G-PINE 2021) -- 5G Communications as "Enabler" for Smart Power Grids: The Case of the Smart5Grid Project -- 5G-VICTORI: Future Railway Communications Requirements Driving 5G Deployments in Railways -- 5G-VICTORI: Optimizing Media Streaming in Mobile Environments using mmWave, NBMP and 5G Edge Computing -- A Novel Architectural Approach for the Provision of Scalable and Automated Network Slice Management, in 5G and Beyond -- A prototype 5G/IoT implementation for transforming a legacy facility to a Smart Factory -- Advanced first responders' services by using FASTER project Architectural Solution -- High mobility 5G services for vertical industries - network operator's view -- Machine Learning-Based, Networking and Computing Infrastructure Resource Management -- Power Control in 5G Heterogeneous Cells considering User Demands using Deep Reinforcement Learning -- The Challenge of Security Breaches in the Era of 5G Networking -- Top Challenges in 5G Densification -- TYPHON: Hybrid Data Lakes for Real-time Big Data Analytics - An Evaluation Framework in the Telecom Industry -- V2X Communications for the Support of GLOSA and Intelligent Intersection Applications -- Artificial Intelligence in Biomedical Engineering and Informatics Workshop (AI-BIO 2021) -- A Machine Learning Approach for Recognition of Elders' Activities using Passive Sensors -- Analyzing Collective Knowledge towards Public Health Policy Making -- Evaluating mental patients utilizing video analysis of facial expressions -- An inception-based architecture for haemodialysis time series classification -- Workshop on Defense Applications of AI (DAAI 2021) -- A Lipschitz - Shapley Explainable Defense Methodology Against Adversarial Attacks -- A Multimodal AI-leveraged Counter-UAV Framework for Diverse Environments -- Cyber attack detection and trust management toolkit for defence-related microgrids -- On the potential of SDN enabled network deployment in tactical environments -- Distributed AI for Resource - Constrained Platforms Workshop (DARE 2021) -- A first sensitivity study of multi-object multi-camera tracking performance -- An Initial Analysis of the Shortcomings of Conventional AI and the Benefits of Distributed AI Approaches in Industrial Use Cases -- Distributed data compression for edge devices -- PFilter: Privacy-aware and secure data filtering at the edge for distributed edge analytics -- Towards a Distributed Learning Architecture for Securing ISP Home Customers -- Energy Efficiency and Artificial Intelligence Workshop (ΕΕΑΙ 2021) -- A Recommendation Specific Human Activity Recognition Dataset with Mobile Device's Sensor Data -- Explainable needn't be (much) less accurate: evaluating an explainable AI dashboard for energy forecasting -- Improving Energy Efficiency in Tertiary Buildings through user-driven Recommendations delivered on optimal Micro-moments -- Semantic modeling of trustworthy IoT entities in energy-efficient cultural spaces -- Short Term Net Imbalance Volume Forecasting through Machine and Deep Learning: A UK case study -- 10th Mining Humanistic Data Workshop (MHDW 2021) -- Community Detection Algorithms for Cultural and Natural Heritage Data in Social Networks -- Forecasting Air Flight Delays and Enabling Smart Airport Services in Apache Spark -- Movie Recommendation System based on Character Graph Embeddings -- Privacy-Preserving Text Labelling Through Crowdsourcing -- Recognition of epidemic cases in social web texts -- Active Bagging Ensemble Selection -- Applying Machine Learning to Predict Whether Learners will Start a MOOC after Initial Registration -- Self-supervised approach for Urban Tree Recognition on Aerial Images -- Visitor behavior analysis for an ancient Greek technology exhibition.