This paper describes a shell that has been developed for the purpose of fuzzy qualitative reasoning. The relation among object predicates is defined by object trees that are fully capable of dynamic growth and maintenance. The qualitatively fuzzy inference engine and the developed expert system can then acquire a virtual-rule space that is exponentially (subject to machine implementation consta...

In The Netherlands, children are considered visually impaired, and therefore eligible for institutional support, if their functional vision is less than 3/10 and/or their visual field is less than 30 degrees. If the visual impairment is such that the child is unable to read print and must resort to Braille, he or she is considered to be blind. If, despite a reduced acuity or limited visual fiel...

Preference modelling and management has attracted considerable attention in the areas of Databases, Knowledge Bases and Information Retrieval Systems in recent years. This interest stems from the fact that a rapidly growing class of untrained lay users confront vast data collections, usually through the Internet, typically lacking a clear view of either content or structure, moreover, not even ...