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SIGMOD
2010
ACM
204views Database» more  SIGMOD 2010»
15 years 6 months ago
Positional update handling in column stores
In this paper we investigate techniques that allow for on-line updates to columnar databases, leaving intact their high read-only performance. Rather than keeping differential str...
Sándor Héman, Marcin Zukowski, Niels...
IJFCS
2002
122views more  IJFCS 2002»
15 years 5 months ago
The Delaunay Hierarchy
We propose a new data structure to compute the Delaunay triangulation of a set of points in the plane. It combines good worst case complexity, fast behavior on real data, small me...
Olivier Devillers
TODS
2002
92views more  TODS 2002»
15 years 5 months ago
Searching in metric spaces with user-defined and approximate distances
Metric access methods (MAMs), such as the M-tree, are powerful index structures for supporting ty queries on metric spaces, which represent a common abstraction for those searchin...
Paolo Ciaccia, Marco Patella
SCHOLARPEDIA
2008
109views more  SCHOLARPEDIA 2008»
15 years 5 months ago
Latent semantic analysis
A new method for automatic indexing and retrieval is described. The approach is to take advantage of implicit higher-order structure in the association of terms with documents (&q...
Thomas K. Landauer, Susan T. Dumais
ECCC
2010
83views more  ECCC 2010»
15 years 3 months ago
Symmetric LDPC codes are not necessarily locally testable
Locally testable codes, i.e., codes where membership in the code is testable with a constant number of queries, have played a central role in complexity theory. It is well known t...
Eli Ben-Sasson, Ghid Maatouk, Amir Shpilka, Madhu ...