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Information systems have to be consistent and secure in presence of multiple conflicting transactions. The role-based access control model is widely used to keep information systems secure. Here, a role is a set of access rights, i.e. permissions. A subject is granted a family of roles, i.e. one or more than one role. A subject s is allowed to issue a method op to an object o only if an access right...
Multi-agent technology and constraint satisfaction techniques can be effectively combined and utilized to solve many real-world problems. This paper presents a multi-agent system based on Probabilistic Interval Algebra (PIA) networks to solve distributed scheduling problems. An IA network is a graph where nodes represent intervals and directed edges are labelled with temporal interval relations. A...
On-demand broadcast is an effective approach to disseminating real-time data to mobile clients in mobile environments. Recent studies mostly assume that clients request only a single data item. This assumption may not sufficiently support the increasingly sophisticated real-time applications in mobile environments. In this paper, we present three on-demand broadcast algorithms to cater for multi-item...
Grid technologies congregate numerous computers to provide powerful computing and massive storage. In data-intense applications, Data Grids are developed to cope with the efficiency of data access. Replication is one of the methods to elevate the access performance. When a file is replicated, it can be downloaded from all the nodes with that file in parallel, thus reducing the access latency. Therefore,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.