9162 search results - page 1753 / 1833 » System and User Data Complexity |
IPPS
2009
IEEE
15 years 4 months ago
2009
IEEE
A well-known problem in P2P systems is freeriding, where users do not share content if there is no incentive to do so. In this paper, we distinguish lazy freeriders that are merel...
101
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IMC
2009
ACM
15 years 4 months ago
2009
ACM
With over half a billion users, Online Social Networks (OSNs) are the major new applications on the Internet. Little information is available on the network impact of OSNs, althou...
HICSS
2008
IEEE
15 years 4 months ago
2008
IEEE
In recent years, instant messaging (IM) has become a popular medium of online communication. While IM is expanding into the enterprise beyond personal use, it brings the convenien...
CCS
2007
ACM
15 years 4 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 ...
108
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VTC
2006
IEEE
15 years 3 months ago
2006
IEEE
Abstract—3GPP is in the process of defining the long-term evolution (LTE) for 3G radio access, sometimes referred to as Super3G, in order to maintain the future competitiveness o...