Abstract Role-Based Access Control (RBAC) is one of the most used models in designing
and implementation of security policies, in large networking systems. Basic RBAC model …

This paper introduces the APIA architecture for policy-aware intentional agents. These
agents, acting in changing environments, are driven by intentions and yet abide by domain …

Agents act in open and thus risky environments with limited or no human intervention.
Making the appropriate decision about who to trust in order to interact with is not only …

Medical diagnosis can be defined as the detection of a disease by examining a patient's
signs, symptoms and history. Diagnostic reasoning can be viewed as a process of testing …

In this paper, we propose a new intelligent, robust and adaptive digital watermarking
technique for colour images based on the combination of discrete wavelet transform (DWT) …

Although learning from data is effective and has achieved significant milestones, it has many
challenges and limitations. Learning from data starts from observations and then proceeds …

We aim in this paper to integrate a nonmonotonic rule system (defeasible logic) with
description logic-based ontologies. This can help us in building defeasible medical …

In this paper, we extend a temporal defeasible logic with a modal operator Committed to
formalize commitments that agents undertake as a consequence of communicative actions …

Confidentiality of information is an important aspect that developers should take into
consideration when building systems. One way to achieve confidentiality is to define access …

The Web service technology provides an environment in which heterogeneous components
can collaborate together to achieve a common goal. However, the opening of Web services …