From Events to Awareness

We define "awareness" as information that is highly relevant to the needs of users and that is delivered in a timely manner. We advocate an event composition approach for computing awareness from various event sources and we describe the events to awareness architecture (E2A) as an embodiment of that approach. E2A is an event-driven publish/subscribe architecture that can be implemented using existing technologies and applied to various domains to provide awareness to users. We describe two different systems where the E2A has been employed to meet the awareness needs of different domains, specifically video surveillance for physical security and human coordination