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SIGMOD
2002
ACM
112views Database» more  SIGMOD 2002»
16 years 2 months ago
Minimal probing: supporting expensive predicates for top-k queries
This paper addresses the problem of evaluating ranked top-? queries with expensive predicates. As major DBMSs now all support expensive user-defined predicates for Boolean queries...
Kevin Chen-Chuan Chang, Seung-won Hwang
EDOC
2005
IEEE
15 years 8 months ago
Semantics of UML 2.0 Activity Diagram for Business Modeling by Means of Virtual Machine
— The paper proposes a more formalized definition of UML 2.0 Activity Diagram semantics. A subset of activity diagram constructs relevant for business process modeling is conside...
Valdis Vitolins, Audris Kalnins
INFOCOM
2002
IEEE
15 years 7 months ago
Ultrafast Photonic Label Switch for Asynchronous Packets of Variable Length
- This paper describes new optical switching architectures supporting asynchronous variable-length packets. Output line contention is resolved by optical delay line buffers. By int...
Masayuki Murata, Ken-ichi Kitayama
BMCBI
2006
103views more  BMCBI 2006»
15 years 2 months ago
Meta-All: a system for managing metabolic pathway information
Background: Many attempts are being made to understand biological subjects at a systems level. A major resource for these approaches are biological databases, storing manifold inf...
Stephan Weise, Ivo Grosse, Christian Klukas, Dirk ...
PODS
2007
ACM
159views Database» more  PODS 2007»
16 years 2 months ago
Generalized hypertree decompositions: np-hardness and tractable variants
The generalized hypertree width GHW(H) of a hypergraph H is a measure of its cyclicity. Classes of conjunctive queries or constraint satisfaction problems whose associated hypergr...
Georg Gottlob, Thomas Schwentick, Zoltán Mi...