Agent supervision is a form of control/customization where a supervisor restricts the behavior of an agent to enforce certain requirements, while leaving the agent as much autonomy as possible. This is done in a setting based on the situation calculus and a variant of the ConGolog programming language that is situation-determined, i.e., the remaining program is a function of the action performe...

This paper introduces GLAM, a system based on situation calculus and meta-rules, which is able to provide adaptation by means of selection of actions. It is primarily designed to provide adaptive navigation. The different levels of conception, related to different aspects of the available metadata, are split in different layers in GLAM, in order to ease the conception of the adaptation system a...

Using data for 1991 to 1997 from the British Household Panel Survey we investigate the incidence of housing finance problems, evictions and repossessions. Previous research on repossessions and problematical housing debt has focused on cross-sectional data. This paper contributes uniquely to the literature by examining the sequence of household and individual events associated with housing arre...

Brain-computer interface technology has been a new communication option for individuals with Amyotrophic Lateral Sclerosis. However, due to the poor financial situation of a large part of the population, in Brazil, their access is hampered. Only patients selected for research or with reasonable purchasing power receive information and, consequently, can acquire new technologies. Although the co...

In this paper we derive nonparametric stochastic volatility models in discrete time. These models generalize parametric autoregressive random variance models, which have been applied quite successfully to financial time series. For the proposed models we investigate nonparametric kernel smoothers. It is seen that so-called nonparametric deconvolution estimators could be applied in this situatio...

One of the challenging issues for investors and professionals is appropriate models to evaluate financial situation of the firms. In this regard, many models have been extracted by researchers using different financial ratios to resolve these issues. However, choosing a model based on the conditions and users’ needs is complex. The main objective of this study is to identify the effect of conti...