Instant messaging (IM) is the term used to describe the technology through which 'users can set up a list of partners who will be able to receive notes that pop up on their screens the moment one of them writes and hits the send button'. While early use could be described as mainly for fun, IM today …

De kwakzalver Jan van der Noot en de dichter Jan van der Noot waren twee verschillende personen.

Fast and successful searching for an object in a multimedia database is a highly desirable functionality. Several approaches to content based retrieval for multimedia databases can be found in the literature [9,10,12,14,17]. The approach we consider is feature extraction. A feature can be seen as a way …

In the first part of this article we intend to indicate a traditional theory about the testability of economic theories. This theory is based on a rationality postulate: rationality is presupposed. The second part will deal with a second theory on economic theory formation, in which rationality occurs …