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CSFW
1994
IEEE
15 years 10 months ago
One-Representative Safety Analysis in the Non-Monotonic Transform Model
We analyze the safety question for the Non-Monotonic Transform NMT model, an access control model that encompasses a wide variety of practical access control mechanisms. In genera...
Ravi S. Sandhu, Paul Ammann
IWCIA
2004
Springer
15 years 12 months ago
Convex Hulls in a 3-Dimensional Space
This paper describes a new algorithm of computing the convex hull of a 3-dimensional object. The convex hull generated by this algorithm stract polyhedron being described by a new ...
Vladimir Kovalevsky, Henrik Schulz
CRIWG
2007
15 years 8 months ago
Directions to Acknowledge Learners' Self-organization in CSCL Macro-scripts
Abstract. In this article we present a conceptual analysis of the notion of learners’ selforganization in CSCL macro-scripts. We highlight that taking into account selforganizati...
Pierre Tchounikine
APPML
2006
73views more  APPML 2006»
15 years 6 months ago
Threshold arrangements and the knapsack problem
We show that a combinatorial question which has been studied in connection with lower bounds for the knapsack problem by Brimkov and Dantchev (2001) is related to threshold graphs...
Günter Rote, André Schulz
IGPL
2007
149views more  IGPL 2007»
15 years 6 months ago
Logical and Philosophical Remarks on Quasi-Set Theory
Quasi-set theory is a theory for dealing with collections of indistinguishable objects. In this paper we discuss some logical and philosophical questions involved with such a theo...
Newton C. A. da Costa, Décio Krause