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ACL
1997
13 years 11 months ago
Fast Context-Free Parsing Requires Fast Boolean Matrix Multiplication
Valiant showed that Boolean matrix multiplication (BMM) can be used for CFG parsing. We prove a dual result: CFG parsers running in time O([Gl[w[3-e) on a grammar G and a string w...
Lillian Lee
COLING
2002
13 years 9 months ago
A Novel Disambiguation Method for Unification-Based Grammars Using Probabilistic Context-Free Approximations
We present a novel disambiguation method for unification-based grammars (UBGs). In contrast to other methods, our approach obviates the need for probability models on the UBG side...
Bernd Kiefer, Hans-Ulrich Krieger, Detlef Prescher
CONTEXT
2003
Springer
14 years 2 months ago
A Generic Framework for Context-Based Distributed Authorizations
In conventional security systems, protected resources such as documents, hardware devices and software applications follow an On/Off access policy. On, allows to grant access and ...
Ghita Kouadri Mostéfaoui, Patrick Bré...
IEEEARES
2008
IEEE
14 years 4 months ago
Context Ontology for Secure Interoperability
During interoperability exchanges, organizations are jointly conducting computation and sharing tasks. However, organizations can have different security policies. To guarantee g...
Céline Coma, Nora Cuppens-Boulahia, Fr&eacu...
EGPGV
2004
Springer
165views Visualization» more  EGPGV 2004»
14 years 3 months ago
Tuning of Algorithms for Independent Task Placement in the Context of Demand-Driven Parallel Ray Tracing
This paper investigates assignment strategies (load balancing algorithms) for process farms which solve the problem of online placement of a constant number of independent tasks w...
Tomas Plachetka