Designed for complex event processing, DataCell is a research prototype database system in the area of sensor stream systems. Under development at CWI, it belongs to the MonetDB database system family. CWI researchers innovatively built a stream engine directly on top of a database kernel, thus exploiting and merging technologies from the stream world and the rich area of database literature. The results are very promising.
Data Stream Management Systems
Information (theme 2)
Database Architectures

Liarou, E, & Kersten, M.L. (2009). DataCell: Exploiting the Power of Relational Databases for Efficient Stream Processing. ERCIM News, (76).