"Brecht atenção" (intradução) por André Vallias

The Office of the educational material’s approval is responsible for approving educational material. The approval process does not include use of the material by students. The productivity of educational products is unknown. The goal of this article is to find a way to calculate the productivity and efficiency of an educational product, to improve it in order to provide a truly effective tool. ...

Baud-rate blind equalization algorithms may converge to undesirable stable equi-libria due to diierent reasons. One is the use of FIR lter as an equalizer. It is proved in this paper that this kind of local minima exist for all blind equalization algorithms. The local minima generated by this mechanism are thus called unavoidable local minima. The other one is due to the cost function adopted b...

In this paper we propose for the real and two independent quadrature carrier cases, a closed-form approximated expression for the achievable residual Inter-Symbol Interference (ISI). The expression depends on the step-size parameter, equalizer’s tap length, equalized output gain, input signal statistics, channel power and SNR. This expression is valid for blind adaptive equalizers where the err...

s (Kohonen et al. 1999). Spring models are another popular category of dimensionality reduction techniques (Kamada and Kawai 1989, Skupin and Fabrikant 2003). Pathfinder network scaling (PFN) is a technique used for network visualization, with a preservation of the most salient links between input features. It is frequently applied to citation networks (Chen and Paul 2001). To illustrate this, ...

Introduction Inference ivolving (so-called counterfactual) conditionals is a well-understood variety of nonmonotonic modes of reasoning. There is, accordingly , some prospect that by establishing links between logics of con-ditionals and varieties of nonmonotonic reasoning our understanding of the latter will improve. The purpose of this paper is to exhibit a close relationship between familiar...

YES Dr St Godard argues1 that physician-assisted suicide and voluntary euthanasia (PASVE; I will avoid any suggestion of a euphemism) are not in anyone’s interest. Ultimately, his arguments rest on a subjective definition of compassion, and a personal view about the role of medicine and suffering. I respect his arguments, but I do not feel that any of them justify a societal ban on PASVE. Compa...