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JACM
2010
120views more  JACM 2010»
15 years 1 months ago
The structure of inverses in schema mappings
A schema mapping is a specification that describes how data structured under one schema (the source schema) is to be transformed into data structured under a different schema (the...
Ronald Fagin, Alan Nash
IANDC
2006
82views more  IANDC 2006»
15 years 6 months ago
Recognizability, hypergraph operations, and logical types
We study several algebras of graphs and hypergraphs and the corresponding notions of equational sets and recognizable sets. We generalize and unify several existing results which ...
Achim Blumensath, Bruno Courcelle
CORR
2004
Springer
130views Education» more  CORR 2004»
15 years 6 months ago
Semantic Linking - a Context-Based Approach to Interactivity in Hypermedia
: The semantic Web initiates new, high level access schemes to online content and applications. One area of superior need for a redefined content exploration is given by on-line ed...
Michael Engelhardt, Thomas C. Schmidt
DCC
2010
IEEE
16 years 1 months ago
A Symbolic Dynamical System Approach to Lossy Source Coding with Feedforward
It is known that modeling an information source via a symbolic dynamical system evolving over the unit interval, leads to a natural lossless compression scheme attaining the entro...
Ofer Shayevitz
ITICSE
2006
ACM
16 years 21 days ago
Putting threshold concepts into context in computer science education
This paper describes Threshold Concepts, a theory of learning that distinguishes core concepts whose characteristics can make them troublesome in learning. With an eye to applying...
Anna Eckerdal, Robert McCartney, Jan Erik Mostr&ou...