In this paper, we describe the use of Piaget’s notion of cognitive development in the building of pre-tests that would allow improving a tutor’s reasoning ability. We are interested in finding individual differences that not only predict a student’s overall performance, but that can also be easily applied to actual tutoring decisions. Our hypothesis was that students with different levels of co...

Cognitive Radio (CR) operates in different fields as varied, one of these is cognitive radio networks. In this paper, we propose a new approach used CR, which aims to manage potential failures of computer systems and applications through the introduction of two aspects of autonomous networks to make systems capable of managing themselves with minimum human intervention. Keywords— Cognitive Radi...

Cognitive radio networks have been envisaged to improve efficiency in accessing the frequency spectrum. However, these networks are prone to different kind of attacks and failures that can compromise the security and performance of licensed and unlicensed users. This work presents a framework for security and resilience in cognitive radio networks. As a showcase, this framework is applied to sp...