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» Associative Algebras Related to Conformal Algebras
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MMMACNS
2005
Springer
15 years 3 months ago
Foundation for a Time Interval Access Control Model
A new model for representing temporal access control policies is introduced. In this model, temporal authorizations are represented by time attributes associated with both subjects...
Francis B. Afinidad, Timothy E. Levin, Cynthia E. ...
AIML
2004
14 years 11 months ago
On Notions of Completeness Weaker than Kripke Completeness
We are going to show that the standard notion of Kripke completeness is the strongest one among many provably distinct algebraically motivated completeness properties, some of whic...
Tadeusz Litak
FSS
2006
140views more  FSS 2006»
14 years 10 months ago
Advances and challenges in interval-valued fuzzy logic
Among the various extensions to the common [0, 1]-valued truth degrees of "traditional" fuzzy set theory, closed intervals of [0, 1] stand out as a particularly appealin...
Chris Cornelis, Glad Deschrijver, Etienne E. Kerre
VLDB
1987
ACM
108views Database» more  VLDB 1987»
15 years 1 months ago
Translating and Optimizing SQL Queries Having Aggregates
is at least ae powerful as SQL. Two well known relational query languages that have a sound theoretical foundation are relational algebra and relational calculus. As SQL is more cl...
Günter von Bültzingsloewen
ISMIS
2005
Springer
15 years 3 months ago
A Data Model Based on Paraconsistent Intuitionistic Fuzzy Relations
Abstract. Paraconsistent intuitionistic fuzzy set is an extension of intuitionistic fuzzy set or interval-valued fuzzy set. It relaxes the requirement that t + f ≤ 1, where t is ...
Haibin Wang, Rajshekhar Sunderraman