Most cooperative work takes place in information-rich environments. However, studies of "information work" tend to focus on the decontextualized access and retrieval pro...
SOFL (Structured-Object-Based-Formal Language) is a formal language and method for practical systems development. As a language, it integrates data ow diagrams, VDM-SL, and Petri ...
This paper presents CCDM, a new architecture for management of devices, which collect environmental information and give effects to the environment. CCDM provides easy management ...
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 ...
The anticipated deployment of IEEE 802.16-based wireless metropolitan area networks (WMANs) will usher a new era in broadband wireless communications. The adoption of the WiMAX te...
Pedro Neves, Ricardo Matos, Bruno Sousa, Giada Lan...