Description in the CAPS 2008 call: “Proactive systems need to be able to understand the different contexts that apply in and for any given user/communication situation. Such context awareness is based on inference of sensor data to achieve knowledge on a users’ state, emotions, activities, goals, etc. and to proactively adjust the systems behavior. Deploying proactive systems in the increasingly embedded and ubiquitous environments further raises the need to make them context-aware.”