If there exists no infrastructure, the Cognitive Ratios have to arrange the access to spectrum by themselves in a distributed manner mostly with partial knowledge. Each user has some information about the network, and with this incomplete knowledge, it aims to operate efficiently. To achieve that, the cognitive Ratio users need cooperation with each other. In the article, game theory and learni...

In this paper, a hybrid overlay/underlay cognitive radio system is modeled as an M/M/1 queue where the rate of arrival and the service capacity are subject to Poisson alternations. Each packet as a customer arriving at the queue makes a decision to join the queue or not. Upon arrival, the individual decision of each packet is optimized based on his observation about the queue length and the sta...

When reading current research, one is overwhelmed by the proliferation of “new” theories of the reading process. The purpose of this paper is to present the prevailing theories of reading comprehension, to examine their similarities and differences, and determine whether they are distinctly different or represent a general theory of cognitive development specifically applied to reading. THEORIE...

Within cognitive models, desires are often considered as functional concepts that play a role in efficient focusing of behaviour. In practice a desire often goes hand in hand with having certain feelings. In this paper by adopting neurological theories a model is introduced incorporating both cognitive and affective aspects in the dynamics of desiring and feeling. Example simulations are presen...

Helping students’ improve their metacognitive and self-regulation skills holds the potential to improve students’ ability to learn independently. Yet, to date, there are relatively few success stories of helping students enhance their metacognitive skills using interactive learning environments. In this paper we describe the Self-Assessment Tutor, an intelligent tutoring system for improving th...

In this study, a dynamic field theory (DFT) based cognitive model of a pilot performing pitch attitude control of a 3 degree of freedom aircraft model is presented. The cognitive model is validated by comparing the pilot model’s pitch attitude hold performance with real flight test results of a human pilot on a real aircraft. A high degree of similarity was observed between the behaviour of the...

For some time cognitive anthropology, and indeed cognitive science generally, hove been concerned with issues of conceptual representation. tnadequocies in classical ond more recent approaches, in particular. prototype theories, hove motivated a scorch for alternative accounts. We propose an approach to conceptuol representation thot requires the specification of domain theories, from which con...

Obesity is a concern worldwide with an increasing proportion of people overweight or obese. Research has focused on preventive programs with numerous health behaviour change interventions (e.g. Hardeman et al., 2000 and Noar et al., 2007), and the development of technologies promoting healthy living and supporting behaviour change (e.g. Consolvo et al., 2008 and Mattila et al., 2008). Intervent...

This paper uses a theoretical model of cooperative learning to examine the survivability of communities of learners. A primary assumption in this article is that individualbased learning tends to use local information to increase an individual’s “fitness” while collaborative learning, based on the sharing of information, knowledge, and resources, increases group fitness. We frame our discussion...

Cognitive science recognizes two kinds of systematicity: (1) as the property where certain cognitive capacities imply certain other related cognitive capacities (Fodor & Pylyshyn, 1988); and (2) as the principle that analogical mappings based on collections of connected relations are preferred over relations in isolation (Gentner, 1983). These two kinds of systematicity were shown to derive fro...