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CIKM
2006
Springer
14 years 1 months ago
2006
Springer
This paper revisits the analysis of annotation propagation from source databases to views defined in terms of conjunctive (SPJ) queries. Given a source database D, an SPJ query Q,...
ECTEL
2006
Springer
14 years 1 months ago
2006
Springer
Abstract. Good teachers know their students, and exploit this knowledge to adapt or optimise their instruction. Teachers know their students because they interact with them face-to...
SPATIALCOGNITION
2000
Springer
14 years 1 months ago
2000
Springer
This paper posits the usefulness of mental shifts of scale and perspective in thinking and communicating about spatial relations, and describes two experimental techniques for res...
ER
1995
Springer
14 years 1 months ago
1995
Springer
We describe a (meta) formalism for defining a variety of (object oriented) data models in a unified framework based on a variation of first-order logic. As specific example we use...
VRML
1995
ACM
14 years 1 months ago
1995
ACM
Virtual environments (VEs) are a broad multidisciplinary research area that includes all aspects of computer science, virtual reality, virtual worlds, teleoperation and telepresenc...