In the semantic web architecture, Web ontology languages are built on top of RDF(S). However, serious difficulties have arisen when trying to layer expressive ontology languages, ...
We consider the problem of building a P2P-based search engine for massive document collections. We describe a prototype system called ODISSEA (Open DIStributed Search Engine Archi...
The World-Wide Web constitutes an activity space in which people set up and host places that are visited by others. To render web places such as homes, sites, and portals attracti...
This paper presents a case study of the NASA Ames Research Center HCI Group's design and development of a problem reporting system for NASA's next generation vehicle (to...
Collin Green, Irene Tollinger, Christian Ratterman...
We introduce a new EM framework in which it is possible not only to optimize the model parameters but also the number of model components. A key feature of our approach is that we...