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» The Value Gap Model: Value-Based Requirements Elicitation
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FOCS
2009
IEEE
14 years 2 months ago
Symmetry and Approximability of Submodular Maximization Problems
Abstract— A number of recent results on optimization problems involving submodular functions have made use of the ”multilinear relaxation” of the problem [3], [8], [24], [14]...
Jan Vondrák
SACMAT
2003
ACM
14 years 22 days ago
An approach to engineer and enforce context constraints in an RBAC environment
This paper presents an approach that uses special purpose RBAC constraints to base certain access control decisions on context information. In our approach a context constraint is...
Gustaf Neumann, Mark Strembeck
MMS
2000
13 years 7 months ago
Dynamic Quota-Based Admission Control with Sub-Rating in Multimedia Servers
An admission control algorithm for a multimedia server is responsible for determining if a new request can be accepted without violating the Quality of Service (QoS) requirements o...
Sheng-Tzong Cheng, Chi-Ming Chen, Ing-Ray Chen
IJCSA
2007
143views more  IJCSA 2007»
13 years 7 months ago
Incremental Trade-Off Management for Preference-Based Queries
Preference-based queries often referred to as skyline queries play an important role in cooperative query processing. However, their prohibitive result sizes pose a severe challen...
Wolf-Tilo Balke, Ulrich Güntzer, Christoph Lo...
WEBI
2009
Springer
14 years 2 months ago
CCR: A Model for Sharing Reputation Knowledge Across Virtual Communities
Information sharing is a key objective in the age of Internet and virtual communities. Reputation information is an important part of a user’s identity and is both a sensitive a...
Tal Grinshpoun, Nurit Gal-Oz, Amnon Meisels, Ehud ...