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» Reminiscences related to graph theory
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PODS
2004
ACM
139views Database» more  PODS 2004»
15 years 12 months ago
On Preservation under Homomorphisms and Unions of Conjunctive Queries
Unions of conjunctive queries, also known as select-project-join-union queries, are the most frequently asked queries in relational database systems. These queries are definable b...
Albert Atserias, Anuj Dawar, Phokion G. Kolaitis
CSL
2009
Springer
15 years 6 months ago
Model Checking FO(R) over One-Counter Processes and beyond
Abstract. One-counter processes are pushdown processes over a singleton stack alphabet (plus a stack-bottom symbol). We study the problems of model checking asynchronous products o...
Anthony Widjaja To
HT
2003
ACM
15 years 5 months ago
HyperReal: a hypermedia model for mixed reality
This paper describes a generic hypermedia model that is used as a framework for building context aware and mixed reality applications. It can handle different media elements, and ...
Luís Romero, Nuno Correia
TIT
2010
174views Education» more  TIT 2010»
14 years 6 months ago
Toeplitz Compressed Sensing Matrices With Applications to Sparse Channel Estimation
Compressed sensing (CS) has recently emerged as a powerful signal acquisition paradigm. In essence, CS enables the recovery of high-dimensional sparse signals from relatively few ...
Jarvis Haupt, Waheed Uz Zaman Bajwa, Gil M. Raz, R...
115
Voted
DM
2006
128views more  DM 2006»
14 years 11 months ago
Non-trivial t-designs without repeated blocks exist for all t
A computer package is being developed at Bayreuth for the generation and investigation of discrete structures. The package is a C and C++ class library of powerful algorithms endow...
Luc Teirlinck