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SIGMOD
1998
ACM
13 years 12 months ago
1998
ACM
Query optimization is an integral part of relational database management systems. One important task in query optimization is selectivity estimation, that is, given a query P, we ...
EPS
1998
Springer
13 years 12 months ago
1998
Springer
We investigate the following question. Do populations of evolving agents adapt only to their recent environment or do general adaptive features appear over time? We find statistica...
CHI
1993
ACM
13 years 11 months ago
1993
ACM
An adaptive user interface relies, to a large extent, upon an adequate user model (e.g., a representationof user-expertise). However, building a user model may be a tedious and ti...
SIGMOD
1993
ACM
13 years 11 months ago
1993
ACM
The traditional focus of relational query optimization schemes has been on the choice of join methods and join orders. Restrictions have typically been handled in query optimizers ...
FOCS
1990
IEEE
13 years 11 months ago
1990
IEEE
Two of the most commonly used models in computational learning theory are the distribution-free model in which examples are chosen from a fixed but arbitrary distribution, and the ...