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Bios Dr. Nancy Wiegand is at the University of Wisconsin-Madison working on the use and development of semantic technologies for the geospatial area. She also has a background in Database Management Systems. N. Wiegand, Dave Kolas, and Gary Berg-Cross organized the Terra Cognita workshops on geospatial semantics at both the 2008 and 2009 International Semantic Web Conferences. These workshops brought together people working on the Semantic Web with those interested in geospatial information. Dr. Gary Berg-Cross is a Cognitive Psychologist (SUNY Stony Brook) who has taught at several colleges (SUNY, Widener, Delaware GW, GMU) and whose professional life included R&D in applied knowledge engineering, collaboration and AI. Major thrusts of his work include reusable knowledge, vocabularies and semantic interoperability achieved through semantic analysis, formalization, capture in knowledge tools and access through Web Sites. For the last 10 years he has had a dual focus on the semantics needed to understand enterprise knowledge and on the advancement of general understanding of the developmental process for cognition. Mike Dean is a Principal Engineer at Raytheon BBN Technologies, where he has worked on Semantic Web standards, tools, and applications since 2000. He is co-author of a geospatial ontology trade study and a co-convener of the Open Ontology Repository initiative. Dr. Naijun Zhou is an assistant professor at the University of Maryland College Park. His research activities include geospatial data interoperability using semantic and ontological technologies, geospatial portals, and Web-based GIS. Dave Kolas is a Scientist at Raytheon BBN Technologies. He has authored many papers in the geospatial Semantic Web area and co-chaired the Terra Cognita workshop on geospatial semantics in 2008, 2009, and 2011. He is also the co-chair of the GeoSPARQL Standards Working Group in the Open Geospatial Consortium. Dr. James Wilson is an assistant professor in geography at James Madison University.
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