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VLDB
1997
ACM
97views Database» more  VLDB 1997»
15 years 8 months ago
The Complexity of Transformation-Based Join Enumeration
Query optimizers that explore a search space exhaustively using transformation rules usually apply all possible rules on each alternative, and stop when no new information is prod...
Arjan Pellenkoft, César A. Galindo-Legaria,...
VLDB
1997
ACM
126views Database» more  VLDB 1997»
15 years 8 months ago
Dynamic Memory Adjustment for External Mergesort
Sorting is a memory intensive operation whose performance is greatly affected by the amount of memory available as work space. When the input size is unknown or available memory s...
Weiye Zhang, Per-Åke Larson
ICDE
1993
IEEE
158views Database» more  ICDE 1993»
15 years 8 months ago
Unification of Temporal Data Models
To add time su port to the relational model, both first normal form (fNF and non-INF appmches have maining within 1NF when time support is added may introduce data redundancy. The...
Christian S. Jensen, Michael D. Soo, Richard T. Sn...
ICPP
1993
IEEE
15 years 8 months ago
Scalability Study of the KSR-1
Scalability of parallel architectures is an interesting area of current research. Shared memory parallel programming is attractive stemming from its relative ease in transitioning...
Umakishore Ramachandran, Gautam Shah, Ravi Kumar, ...
ICIP
1994
IEEE
15 years 8 months ago
Total Variation Based Image Restoration with Free Local Constraints
The two main plagues of image restoration are oscillations and smoothing. Traditional image restoration techniques prevent parasitic oscillations by resorting to smooth regulariza...
Leonid I. Rudin, Stanley Osher
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