Semantic relationships within knowledge bases are the links that connect concepts to one another. They are often used, for example, within information retrieval applications for search term expansion. The overall goal of this project was to manually identify the semantic relationships within health consumer question and physician-provided answer texts. We created a collection of manually identi...

This paper addresses questions about how the levels of causality (generic and single case causality) are related. One question is epistemological: can relationships at one level be evidence for relationships at the other level? We present three kinds of answer to this question, categorised according to whether inference is top-down, bottom-up, or the levels are independent. A second question is...

The phenomenon of quantum antiresonance (QAR), i.e., exactly periodic recurrences in quantum dynamics, is studied in a large class of nonintegrable systems, the modulated kicked rotors (MKRs). It is shown that asymptotic exponential localiza-tion generally occurs for η (a scaled ¯ h) in the infinitesimal vicinity of QAR points η 0. The localization length ξ 0 is determined from the analytical p...