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EDBT
2010
ACM
147views Database» more  EDBT 2010»
14 years 5 months ago
A simple (yet powerful) algebra for pervasive environments
Querying non-conventional data is recognized as a major issue in new environments and applications such as those occurring in pervasive computing. A key issue is the ability to qu...
Yann Gripay, Frédérique Laforest, Je...
PODS
2009
ACM
130views Database» more  PODS 2009»
14 years 11 months ago
Secondary indexing in one dimension: beyond b-trees and bitmap indexes
Let be a finite, ordered alphabet, and consider a string x = x1x2 . . . xn n . A secondary index for x answers alphabet range queries of the form: Given a range [al, ar] , retu...
Rasmus Pagh, Srinivasa Rao Satti
ICDT
2012
ACM
242views Database» more  ICDT 2012»
12 years 1 months ago
Win-move is coordination-free (sometimes)
In a recent paper by Hellerstein [15], a tight relationship was conjectured between the number of strata of a Datalog¬ program and the number of “coordination stages” require...
Daniel Zinn, Todd J. Green, Bertram Ludäscher
BMCBI
2008
75views more  BMCBI 2008»
13 years 10 months ago
Re-searcher: a system for recurrent detection of homologous protein sequences
Background: Sequence searches are routinely employed to detect and annotate related proteins. However, a rapid growth of databases necessitates a frequent repetition of sequence s...
Valdemaras Repsys, Mindaugas Margelevicius, Ceslov...
SIGMOD
2007
ACM
196views Database» more  SIGMOD 2007»
14 years 10 months ago
Adaptive location constraint processing
An important problem for many location-based applications is the continuous evaluation of proximity relations among moving objects. These relations express whether a given set of ...
Zhengdao Xu, Hans-Arno Jacobsen