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B.A., Miami University, 1970; M.S., Miami University, 1972; Ph.D., °ÄÃÅÁùºÏ²ÊÔ¤²â, 1984Mobile computing, particularly techniques to effectively access location dependent data (LDD); Data mining, including development of algorithms to identify association rules that are adaptive to available main memory and are online; GIS databases, main memory databases, temporal databases, and environmental science