The problem investigated is that of a human observer having to distinguish between certain specified geometrical forms corrupted by speckle-an idealization of the problem of a scientist studying a synthetic aperture radar map. Specifically, the cases of two simple alternative forms and of two and four orientations of a simple form have been considered. A theoretical model is developed for the o...

eHealth is becoming an increasingly noteworthy domain in terms of public sector exploitation of information and communications technologies. Appro-priately identifying the users of electronic health systems is a major contem-porary challenge. The appropriate identification of eHealth systems’ and ser-vices’ users is one of its core areas of concern. This paper develops a particular problem stat...

This paper proposes several ways to extend the standard model for health and health services. Psychological aspects such as status seeking, identity seeking and health adaptation are modelled within the framework of the Grossman model. While the two first aspects may be important psychological mechanisms, the adaptation process seems to be the most relevant process to model within a theoretical...

Human texture vision has been modeled as a filter-rectify-filter (FRF) process, in which '2nd-order' filters detect changes in the rectified outputs of luminance-based '1st-order' filters. This study tested the validity of the two basic assumptions of the standard FRF model, namely (a) that the 2nd-order filters are sensitive to spatial modulations in both contrast and orientation, and (b) that...