Sciweavers

3921 search results - page 249 / 785
» Transforming Models with ATL
Sort
View
VLDB
2004
ACM
102views Database» more  VLDB 2004»
15 years 12 months ago
PIVOT and UNPIVOT: Optimization and Execution Strategies in an RDBMS
PIVOT and UNPIVOT, two operators on tabular data that exchange rows and columns, enable data transformations useful in data modeling, data analysis, and data presentation. They ca...
Conor Cunningham, Goetz Graefe, César A. Ga...
DL
1998
Springer
120views Digital Library» more  DL 1998»
15 years 10 months ago
Conjunctive Constraint Mapping for Data Translation
In this paper we present a mechanism for translating information in heterogeneous digital library environments. We model information as a set of conjunctive constraints that are s...
Kevin Chen-Chuan Chang, Hector Garcia-Molina
VLDB
1991
ACM
108views Database» more  VLDB 1991»
15 years 10 months ago
Management Of Schema Evolution In Databases
This paper presentsa version model which handlesdatabaseschemachangesandwhich takesevolution into account. Its originality is in allowing the development of partial schema version...
José Andany, Michel Léonard, Carole ...
PKC
2010
Springer
119views Cryptology» more  PKC 2010»
15 years 8 months ago
Efficient Set Operations in the Presence of Malicious Adversaries
We revisit the problem of constructing efficient secure two-party protocols for the problems of setintersection and set-union, focusing on the model of malicious parties. Our main...
Carmit Hazay, Kobbi Nissim
ECCV
2008
Springer
15 years 8 months ago
Shape-Based Retrieval of Heart Sounds for Disease Similarity Detection
Retrieval of similar heart sounds from a sound database has applications in physician training, diagnostic screening, and decision support. In this paper, we exploit a visual rende...
Tanveer Fathima Syeda-Mahmood, Fei Wang