University of Sydney - Graph drawing, information visualization, software visualization, algorithms.

University of Salzburg - Artificial intelligence, automated theorem proving, proof calculi and their complexities, logic programming, theoretical computer science, and complexity theory .

University of Texas in Arlington - Temporal databases, conceptual modeling, object-oriented databases, systems integration, distributed and multi-database systems, database models and languages, DBMS system implemention, indexing techniques, software engineering environments, operating systems, programming languages.