The article describes semi-symbolic methods for the analysis of control and signal processing systems, including static and dynamic uncertainties. This above mentioned semi-symbolic description of uncertainties is based upon affine arithmetic. A short introduction to affine arithmetic is given. As affine arithmetic is only able to describe static uncertainties, an extension for effects of dynam...

A qualitative modelling approach is used into the description of lime-mash flow processes of an industrial lime transport machine in order to monitor and analyze its performance prior to its application. Realistic and reliable qualitative models of the lime transport system under investigation were produced offline. The results obtained from running the simulation of these models, in order to a...

Critical thinking skills are seen as one of the most important skills for researchers. Mash-Up Research Environments have the potential to activate these skills. While these environments already have their own value, this work provides a first step in answering the question of whether or not they activate thinking processes, and as a further step, what quality of thinking is activated. Consider...

The quality standards of the output, the features of delivery and the introduction of new services are becoming the most important factors to success in business performance. In this context, the application of new methodologies is essential to increase the business performance. Six Sigma can give an important solution for those companies that intend to highlight the customer satisfaction focus...

We compute the Bieri-Neumann-Strebel-Renz geometric invariants, Σn, of the lamplighter groups Lm by using the Diestel-Leader graph DL(m,m) to represent the Cayley graph of Lm.