4397 search results - page 691 / 880 » Relational Algebra Operations |
116
click to vote
SACMAT
2010
ACM
15 years 8 months ago
2010
ACM
The role-based access control (RBAC) has significantly simplified the management of users and permissions in computing systems. In dynamic environments, systems are usually unde...
138
click to vote
SIGMOD
2010
ACM
15 years 8 months ago
2010
ACM
We investigate the problem of creating and analyzing samples of relational databases to find relationships between string-valued attributes. Our focus is on identifying attribute...
143
click to vote
SIGMOD
2010
ACM
15 years 8 months ago
2010
ACM
Uncertain data streams, where data is incomplete, imprecise, and even misleading, have been observed in many environments. Feeding such data streams to existing stream systems pro...
131
click to vote
SIGMOD
2010
ACM
15 years 8 months ago
2010
ACM
Current relational databases require that a database schema exist prior to data entry and require manual optimization for best performance. We describe the query optimization tech...
115
click to vote
CDC
2009
IEEE
15 years 8 months ago
2009
IEEE
— This paper deals with the class of polynomially uncertain continuous-time linear time-invariant (LTI) systems whose uncertainties belong to a semi-algebraic set. The objective ...