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GIS
2004
ACM
14 years 8 months ago
A novel improvement to the R*-tree spatial index using gain/loss metrics
The R*-tree is a state-of-the-art spatial index structure. It has already found its way into commercial systems. The most important improvement of the R*-tree over the original R-...
Donghui Zhang, Tian Xia
KDD
2006
ACM
159views Data Mining» more  KDD 2006»
14 years 8 months ago
Global distance-based segmentation of trajectories
This work introduces distance-based criteria for segmentation of object trajectories. Segmentation leads to simplification of the original objects into smaller, less complex primi...
Aris Anagnostopoulos, Michail Vlachos, Marios Hadj...
PODS
2007
ACM
171views Database» more  PODS 2007»
14 years 7 months ago
Monadic datalog over finite structures with bounded treewidth
Bounded treewidth and Monadic Second Order (MSO) logic have proved to be key concepts in establishing fixed-parameter tractability results. Indeed, by Courcelle's Theorem we ...
Georg Gottlob, Reinhard Pichler, Fang Wei
MOBISYS
2004
ACM
14 years 7 months ago
Tracking Moving Devices with the Cricket Location System
We study the problem of tracking a moving device under two indoor location architectures: an active mobile architecture and a passive mobile architecture. In the former, the infra...
Adam Smith, Hari Balakrishnan, Michel Goraczko, Ni...
TCC
2010
Springer
324views Cryptology» more  TCC 2010»
14 years 4 months ago
Leakage-Resilient Signatures
The strongest standard security notion for digital signature schemes is unforgeability under chosen message attacks. In practice, however, this notion can be insufficient due to â€...
Sebastian Faust, Eike Kiltz, Krzysztof Pietrzak, G...