Sciweavers

2217 search results - page 362 / 444
» Rank-aware Query Optimization
Sort
View
126
Voted
IDEAS
2007
IEEE
135views Database» more  IDEAS 2007»
15 years 9 months ago
Bitmap Index Design Choices and Their Performance Implications
Historically, bitmap indexing has provided an important database capability to accelerate queries. However, only a few database systems have implemented these indexes because of t...
Elizabeth J. O'Neil, Patrick E. O'Neil, Kesheng Wu
131
Voted
CRYPTO
2007
Springer
134views Cryptology» more  CRYPTO 2007»
15 years 8 months ago
Domain Extension of Public Random Functions: Beyond the Birthday Barrier
A public random function is a random function that is accessible by all parties, including the adversary. For example, a (public) random oracle is a public random function {0, 1}â...
Ueli M. Maurer, Stefano Tessaro
EXPDB
2006
ACM
15 years 8 months ago
Pushing XPath Accelerator to its Limits
Two competing encoding concepts are known to scale well with growing amounts of XML data: XPath Accelerator encoding implemented by MonetDB for in-memory documents and X-Hive’s ...
Christian Grün, Alexander Holupirek, Marc Kra...
121
Voted
SSDBM
2005
IEEE
148views Database» more  SSDBM 2005»
15 years 8 months ago
A Fast Approximation Scheme for Probabilistic Wavelet Synopses
Several studies have demonstrated the effectiveness of Haar wavelets in reducing large amounts of data down to compact wavelet synopses that can be used to obtain fast, accurate a...
Antonios Deligiannakis, Minos N. Garofalakis, Nick...
131
Voted
CCS
2005
ACM
15 years 8 months ago
CPOL: high-performance policy evaluation
Policy enforcement is an integral part of many applications. Policies are often used to control access to sensitive information. Current policy specification languages give users ...
Kevin Borders, Xin Zhao, Atul Prakash