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	Jensen, Christian S.     Options: All Media Types Journals Proceedings Div Books Whole Books Other Date Reviewed Title Author Publisher Published Date Descending Ascending Date Reviewed     1 - 2 of 2 reviews       Moving spatial keyword queries: formulation, methods, and analysis Wu D., Yiu M., Jensen C. ACM Transactions on Database Systems 38(1): 1-47, 2013.  Type: Article As the availability of spatial information increases and location-aware services and applications proliferate, the efficient processing of spatial queries is becoming more important. Keyword- or content-based querying introduces the ne...... Oct 4 2013     On the semantics of “now” in databases Clifford J., Dyreson C., Isakowitz T., Jensen C., Snodgrass R. ACM Transactions on Database Systems 22(2): 171-214, 1997.  Type: Article In many database applications, the ability to represent certain concepts of time, such as “this information is valid now” or “this information is valid until changed,” is important....... Sep 1 1997
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