Presentation topics will be selected from the following list (tentative): Stream processing: * stream query languages * evaluation and optimization of stream queries * querying and programming sensor networks Architectures: * ECA systems * Publish/Subscribe systems * Peer-to-peer systems * temporal issues * workflows Privacy and security issues: * location privacy * context-sensitive authorization * profiles and policies Dealing with the physical world: * querying the world * actuators, control, feedback * uncertainty Context-awareness: * location awareness * user profiles * contextual mediation * context-aware preferences * context management systems (Gaia, Aura, Context Weaver, Context Toolkit) * communication context Applications: * smart homes * healthcare * environment * sports and recreation * business/manufacturing