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167
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COMPGEOM
2007
ACM
15 years 10 months ago
2007
ACM
The paper consists of two major parts. In the first part, we re-examine relative -approximations, previously studied in [12, 13, 18, 25], and their relation to certain geometric p...
164
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ATAL
2006
Springer
15 years 10 months ago
2006
Springer
Distributed constraint optimization (DCOP) has emerged as a useful technique for multiagent coordination. While previous DCOP work focuses on optimizing a single team objective, i...
172
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CCS
2006
ACM
15 years 10 months ago
2006
ACM
A high-level security policy states an overall requirement for a sensitive task. One example of a high-level security policy is a separation of duty policy, which requires a sensi...
183
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CCS
2006
ACM
15 years 10 months ago
2006
ACM
We introduce the notion of resiliency policies in the context of access control systems. Such policies require an access control system to be resilient to the absence of users. An...
185
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ALT
1995
Springer
15 years 10 months ago
1995
Springer
This paper characterizes the polynomial time learnability of TPk, the class of collections of at most k rst-order terms. A collection in TPk de nes the union of the languages de n...