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» Positional Grouping in XQuery
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ICDE
2004
IEEE
120views Database» more  ICDE 2004»
14 years 6 months ago
Minimization and Group-By Detection for Nested XQueries
We describe and evaluate a query minimization technique that applies to XQueries, which are nested, perform arbitrary joins, and freely mix bag and set semantics. These features c...
Alin Deutsch, Yannis Papakonstantinou, Yu Xu
SIGMOD
2001
ACM
93views Database» more  SIGMOD 2001»
14 years 5 months ago
XQuery Formal Semantics: State and Challenges
The XQuery formalization is an ongoing effort of the W3C XML Query working group to define a precise formal semantics for XQuery. This paper briefly introduces the current state o...
Peter Fankhauser
CRIWG
2003
13 years 6 months ago
Collaborative Scenarios to Promote Positive Interdependence among Group Members
Positive interdependence is the heart of collaborative activities that define collaboration and transform group work into teamwork. To achieve positive interdependence among studen...
César A. Collazos, Luis A. Guerrero, Jos&ea...
DM
2008
100views more  DM 2008»
13 years 5 months ago
Adaptive group testing for consecutive positives
Motivated from an application to DNA library screening, Balding and Torney [1] and Colbourn [4] studied the following group testing for consecutive positives. Suppose Vn = {v1 v2 ...
Justie Su-tzu Juan, Gerard J. Chang
SCIA
2009
Springer
118views Image Analysis» more  SCIA 2009»
13 years 9 months ago
Grouping of Semantically Similar Image Positions
Features from the Scale Invariant Feature Transformation (SIFT) are widely used for matching between spatially or temporally displaced images. Recently a topology on the SIFT featu...
Lutz Priese, Frank Schmitt, Nils Hering