This paper presents the tool developed and used during the first year of the European IST project SCALE 1 (Internet-Based intelligent tool for Supporting Collaborative Argumentation and Learning). This tool allows argumentative interactions across internet that can be used in pedagogical situations. In adjunction to regular collaborative tools (chat, white… (More)
Recent years witnessed an ever growing impact of trust in the decision-making process within virtual communities. The inherent decentralized and open nature of such environments produced new challenges that received, up to now, little attention. For example, the individual and collective trust co-influence remains an unexplored issue. In this paper we are… (More)
Making safe and consistent decisions is essential to geometric algorithms. Quite a few solutions to this problem have been suggested in the recent years, but they generally ask that drastic changes be made to algorithms. A simple and eecient paradigm is suggested here, which enables programmers to forget about precision issues altogether, whatever algorithm… (More)
83] W. Walter. FORTRAN-SC, a FORTRAN extension for engineer-ing/scientiic computation with access to ACRITH: Language descrioption with examples.ordinate measuring machines: a study of needs. a FORTRAN extension for engineer-ing/scientiic computation with access to ACRITH: Demonstration of the compiler and sample programs. A review of current geometric… (More)
Virtual communities (VCs) are open socio-technical structures wherein autonomous entities (i.e. agents) with common objectives join together to mutually satisfy their goals. The success of these communities relies on collaboration and resource sharing principals, making trust a critical issue for each member. Such environments motivate the need for more… (More)
We present here an approach for a hybrid model of trust. Our idea on the trust model is that all evidences on interactions could be used to measure the trust on required actions before taking the decision. We use the policy language proposed by Krukow et al., with some slight modifications to specify our trust model.
In this paper, we advocate the use of code polymorphism as an efficient means to improve security at several levels in electronic devices. We analyse the threats that polymorphism could help thwart, and present the solution that we plan to demonstrate in the scope of a collaborative research project called COGITO. We expect our solution to be effective to… (More)