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This paper extends traditional faceted search to support richer information discovery tasks over more complex data models. Our first extension adds flexible, dynamic business intelligence aggregations to the faceted application, enabling users to gain insight into their data that is far richer than just knowing the quantities of documents belonging to each facet. We see this capability as a step toward bringing OLAP capabilities, traditionally supported by databases over relational data, to the domain of free-text queries over metadata-rich content. Our second extension shows how one can efficiently extend a faceted search engine to support correlated facets -a more complex information model in which the values associated with a document across multiple facets are not independent. We show that by reducing the problem to a recently solved tree-indexing scenario, data with correlated facets can be efficiently indexed and retrieved.

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We use human mobility models, for which we are experts, and attach a virus infection dynamics to it, for which we are not experts but have taken it from the literature, including recent publications. This results in a virus spreading dynamics model. The results should be verified, but because of the current time pressure, we publish them in their current state. Recommendations for improvement are welcome. We come to the following conclusions:

ZnO powder heat treated in NH 3 atmosphere was investigated by electron paramagnetic resonance, photoluminescence, and Raman spectroscopy. We find that the treatment creates Zn interstitials ͑Zn i ͒ and complexes of Zn interstitials and nitrogen atoms substituting oxygen ͑Zn iN O ͒. A correlation between the Zn i and an exciton at 3.366 eV ͑I 3 ͒ can be stated by a comparison with the PL results; furthermore, the ͑Zn iN O ͒ complex seems to be related to a recombination at 3.193 eV.