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ICDE
1998
IEEE
139views Database» more  ICDE 1998»
14 years 17 hour ago
Cost and Imprecision in Modeling the Position of Moving Objects
Consider a database that represents the location of moving objects, such as taxi-cabs (typical query: retrieve the cabs that are currently within 1 mile of 33 Michigan Ave., Chica...
Ouri Wolfson, Sam Chamberlain, Son Dao, Liqin Jian...
GIS
2007
ACM
13 years 11 months ago
Pipelined spatial join processing for quadtree-based indexes
Spatial join is an important yet costly operation in spatial databases. In order to speed up the execution of a spatial join, the input tables are often indexed based on their spa...
Walid G. Aref
EMNLP
2008
13 years 9 months ago
Scaling Textual Inference to the Web
Most Web-based Q/A systems work by finding pages that contain an explicit answer to a question. These systems are helpless if the answer has to be inferred from multiple sentences...
Stefan Schoenmackers, Oren Etzioni, Daniel S. Weld
DGO
2003
139views Education» more  DGO 2003»
13 years 9 months ago
Better Public Policy Through Natural Language Information Access
Federal agencies implement laws passed by the Congress by creating rules and regulations that can be applied in practice. During this process, staffs at the various agencies may r...
Boris Katz, Roger Hurwitz, Jimmy J. Lin, Özle...
SIGMOD
1997
ACM
180views Database» more  SIGMOD 1997»
13 years 12 months ago
Online Aggregation
Aggregation in traditional database systems is performed in batch mode: a query is submitted, the system processes a large volume of data over a long period of time, and, eventual...
Joseph M. Hellerstein, Peter J. Haas, Helen J. Wan...