Guy Sharon  IBM Haifa Labs, Haifa University Campus, Mount Carmel, Haifa, 31905, Israel (guyshil.ibm.com). Mr. Sharon is team leader for the IBM Active Middleware Technology™ at the IBM Research Laboratory in Haifa. He received B.S. and M.S. degrees in information systems engineering from the Technion–Israel Institute of Technology. His research focuses on active systems, CEP, active databases, and real-time systems.

Opher Etzion  IBM Haifa Labs, Haifa University Campus, Mount Carmel, Haifa, 31905, Israel (opheril.ibm.com). Dr. Etzion is an IBM Senior Technical Staff Member and lead architect for event-processing technologies in the IBM Software group, WebSphere^® division. Previously he was a senior manager in the IBM Research Division, managing a department that performed one of the pioneering projects that shaped the area of CEP. He is the chair of the Event Processing Technical Society. He has authored or coauthored about 70 papers in refereed journals and conference presentations on topics related to active databases, temporal databases, rule-based systems, CEP, and autonomic computing. He coauthored Temporal Database—Research and Practice (Springer-Verlag). He is an adjunct faculty member at the Technion–Israel Institute of Technology.