666 search results - page 30 / 134 » A Practical Approach to Access Heterogeneous and Distributed... |
SIGMOD
1999
ACM
13 years 12 months ago
1999
ACM
The database query optimizer requires the estimation of the query selectivity to find the most efficient access plan. For queries referencing multiple attributes from the same rel...
POLICY
2005
Springer
14 years 1 months ago
2005
Springer
This paper presents a framework for representing and distributing access control policies in distributed heterogeneous systems. Access control polices follows the RBAC (Role Based...
EDBT
2006
ACM
14 years 7 months ago
2006
ACM
Scientific data in the life sciences is distributed over various independent multi-format databases and is constantly expanding. We discuss a scenario where a life science research...
TPDS
2008
13 years 7 months ago
2008
In this paper, we discuss and compare several policies to place replicas in tree networks, subject to server capacity and Quality of Service (QoS) constraints. The client requests ...
W4A
2009
ACM
14 years 2 months ago
2009
ACM
Persons with disabilities are often marginalised from economy and society due to the lack of access to disability related information and services. Through the use of assistive te...