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SIGMOD
2005
ACM
133views Database» more  SIGMOD 2005»
15 years 12 months ago
Semantics and Evaluation Techniques for Window Aggregates in Data Streams
A windowed query operator breaks a data stream into possibly overlapping subsets of data and computes results over each. Many stream systems can evaluate window aggregate queries....
Jin Li, David Maier, Kristin Tufte, Vassilis Papad...
STOC
2009
ACM
145views Algorithms» more  STOC 2009»
16 years 13 days ago
Differential privacy and robust statistics
We show by means of several examples that robust statistical estimators present an excellent starting point for differentially private estimators. Our algorithms use a new paradig...
Cynthia Dwork, Jing Lei
STOC
2007
ACM
128views Algorithms» more  STOC 2007»
16 years 4 days ago
Iteratively constructing preconditioners via the conjugate gradient method
We consider the problem of solving a symmetric, positive definite system of linear equations. The most well-known and widely-used method for solving such systems is the preconditi...
John Dunagan, Nicholas J. A. Harvey
OOPSLA
2009
Springer
15 years 6 months ago
Supporting model evolution through demonstration-based model transformation
Model evolution is often supported by writing model transformation rules in specialized languages. This presents challenges to those who are unfamiliar with model transformation l...
Yu Sun
OOPSLA
2005
Springer
15 years 5 months ago
Improving architecture testability with patterns
There is a critical need for approaches to support software testing. Our research exploits the information described at Architectural Patterns to drive the definition of tests. As...
Roberta Coelho, Uirá Kulesza, Arndt von Sta...