Hi all, Theodore Johnson will be visiting the department from ATT Labs on Wednesday, October 24. He'll be giving a talk about Data Stream Warehousing. The talk will be 12 noon to 1:30 pm, in Room 302. Abstract: Data stream processing is a well-studied area that has led to many commercial offerings. Stream processing systems typically store only a small history of a stream, and provide services such as real-time alerting and visualization, and data reduction for downstream processing. However many applications also require that long term (e.g. 2 year) histories as well as real-time data be provided to analysts. A stream warehouse combines aspects of data stream processing (continual data ingest) with data warehousing (long-term storage and materialized views). I will discuss special issues and opportunities that arise in stream warehousing, and stream warehouse applications within AT&T Labs - Research. Bio: Theodore Johnson received a PhD in Computer Science from New York University in 1990. From 1990 through 1996, he was an Associate Professor at the CISE department of the University of Florida. In 1996, Ted moved to the Database Research group of AT&T Labs - Research and has been there since. Ted has specialized in data steam management systems, being one of the principal authors of the GS Tool (previously, Gigascope) and of the DataDepot stream warehouse. Ted has written two books, Distributed Operating Systems and Algorithms (with Randy Chow) and Exploratory Data Mining and Data Cleaning (with Tamraparni Dasu). -- Ari Rabkin asrabkin@gmail.com Princeton Computer Science Department