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PODS
2007
ACM
107views Database» more  PODS 2007»
16 years 6 months ago
Polynomial time fragments of XPath with variables
Variables are the distinguishing new feature of XPath 2.0 which permits to select n-tuples of nodes in trees. It is known that the Core of XPath 2.0 captures n-ary first-order (FO...
Emmanuel Filiot, Joachim Niehren, Jean-Marc Talbot...
DCC
2003
IEEE
16 years 6 months ago
A Geometric Relationship Between Equivalent Spreads
By Andr`e theory, it is well known how to algebraically convert a spread in a projective space to an equivalent spread (representing the same translation plane) in a projective sp...
Keith E. Mellinger
155
Voted
SIGCSE
2010
ACM
166views Education» more  SIGCSE 2010»
16 years 1 months ago
Braided teaching in secondary CS education: contexts, continuity, and the role of programming
In this paper, we propose a new approach to thinking about and implementing Computer Science curricula in secondary education. The characteristic feature is to organize the items ...
Arno Pasternak, Jan Vahrenhold
ACSD
2009
IEEE
149views Hardware» more  ACSD 2009»
16 years 1 months ago
From Concurrent Multi-clock Programs to Deterministic Asynchronous Implementations
We propose a general method to characterize and synthesize correctness-preserving, asynchronous wrappers for synchronous processes on a globally asynchronous locally synchronous (...
Dumitru Potop-Butucaru, Robert de Simone, Yves Sor...
LICS
2009
IEEE
16 years 1 months ago
Wreath Products of Forest Algebras, with Applications to Tree Logics
—We use the recently developed theory of forest algebras to find algebraic characterizations of the languages of unranked trees and forests definable in various logics. These i...
Mikolaj Bojanczyk, Howard Straubing, Igor Walukiew...