O presente artigo evidencia a importância de tratar os conceitos de usabilidade no desenvolvimento de aplicações para TV interativa bem com a importância de se ter cautela nesse processo. Demonstra, outrossim, as principais etapas do processo de desenvolvimento de aplicações para TV interativa, afim de providenciar uma certa melhoria em relação à usabilidade desta tecnologia a ser implantada no...

In this paper, a robust controller for a Six Degrees of Freedom (6 DOF) coaxial trirotor helicopter control is proposed in presence of defects in the system. A control strategy based on the coupling of the interval type-2 fuzzy logic control and sliding mode control technique are used to design a controller. The main purpose of this work is to eliminate the chattering phenomenon and guaranteein...

It is stressed that the brain/mind complex constitutes a monolithic system that functions with emergent properties at several levels of hierarchical organization. These hierarchical levels are non-reducible to one another; they are at least three (neuronal, functional, and semantic), and they function within an interactional plan. From the epistemological view-point, the brain/mind complex uses...

In this paper we summarize some fundamental results on left-continuous t-norms. First we study the nilpotent minimum and related operations in considerable details. This is the very first example of a left-continuous but not continuous t-norm in the literature. Then we recall some recent extensions and construction methods.

J. R. Vázquez de Aldana, N. J. Kylstra, L. Roso, P. L. Knight, A. Patel, and R. A. Worthington Departamento de Fı́sica Aplicada, Universidad de Salamanca, E-37008 Salamanca, Spain Department of Physics, Science Laboratories, University of Durham, Durham DH1 3LE, United Kingdom Optics Section, Blackett Laboratory, Imperial College, London SW7 2BW, United Kingdom ~Received 20 December 2000; publis...