The widespreading of XML as a content-description language on the Web requires advanced processing and management techniques for huge XML databases. XPath is a standard language for extracting the specified elements from XML documents, and its efficient support is one of the key issues in the current XML database technology. In this paper, we propose an XPath query transformation method for the...

| The classical view of information processing in the cortex is that of a bottom-up process in a feed-forward hierarchy. However there is psychophysical, anatomical and physiological evidence that top-down eeects play a crucial role in the processing of input stimuli. Hardly anything is known about the neural mechanisms underlying these effects. Here we investigate a physiologically inspired mo...

Off-line compilation of logic grammars using Magic allows an incorporation of filtering into the logic underlying the grammar. The explicit definite clause characterization of filtering resulting from Magic compilation allows processor independent and logically clean optimizations of dynamic bottom-up processing with respect to goal-directedness. Two filter optimizations based on the program tr...

With the growing importance of XML in data exchange, much research has been done in proving flexible query mechanisms to extract data from structured XML documents. The semi-structured nature of XML data and the requirements on query flexibility pose unique challenges to database indexing methods. Recently, ViST that uses suffix tree and BTree was proposed to reduce the search time of the docum...

Statistical learning of patterns from perceptual input is an increasingly central topic in cognitive processing including human language acquisition. We present an unsupervised computational method for statistical word learning by analysis of transitional probabilities of subsequent phone pairs. Results indicate that word differentiation is possible with this type of approach and are in line wi...