2 0 1 2 Visiting Fellow at the University of Bielefeld, Germany
2 0 1 1 Visiting Fellow at the University of Bielefeld, Germany
2 0 0 5 Visiting Fellow at the Center for the Philosophy of Science, University of Pittsburgh PA, USA
2 0 0 3 Visiting Fellow at the University of Oslo, Norway
2 0 0 0 DAAD Visiting Fellowship at the University of Bielefeld, Germany
1 9 9 6 – p r e s e n t Member of the Center for the Philosophy of Science, University of Pittsburgh PA, USA
1 9 9 6 Visiting Fellow at the Center for Philosophy of Science, University of Pittsburgh, USA
1 9 9 4 – 1 9 9 6 Research Staff at the DFG project on Quantum Mechanics, Institute for Theoretical Physics,
University of Cologne, and University of Heidelberg, Germany
1 9 9 0 – 1 9 9 2 Alexander von Humboldt Visiting Fellowship at the Department of Philosophy, University of
Heidelberg, Germany
1 9 8 8 – p r e s e n t Member of Fitzwilliam College, Cambridge University, England
1 9 8 8 Visiting Fellow at Fitzwilliam College, Cambridge University, England