560 search results - page 109 / 112 » A Grid Environment for Data Integration of Scientific Databa... |
SSDBM
2008
IEEE
14 years 1 months ago
2008
IEEE
Random sampling is a popular technique for providing fast approximate query answers, especially in data warehouse environments. Compared to other types of synopses, random sampling...
CCS
2007
ACM
14 years 1 months ago
2007
ACM
In this paper, we study the maintenance of role-based access control (RBAC) models in database environments using transitive closure relations. In particular, the algorithms that ...
ICDE
2006
IEEE
14 years 1 months ago
2006
IEEE
Users tend to use the Internet for “resource-hungry” applications (which involve content such as video, audio on-demand and distributed data) and at the same time, more and mo...
ICDE
2009
IEEE
14 years 9 months ago
2009
IEEE
XML streams, such as RSS feeds or complex event streams, are becoming increasingly pervasive as they provide the foundation for a wide range of emerging applications. An important...
JCDL
2003
ACM
14 years 23 days ago
2003
ACM
The National Science Digital Library (NSDL), launched in December 2002, is emerging as a center of innovation in digital libraries as applied to education. As a part of this exten...