Professor of astrophysics, university of Geneva

Dist. Univ. Research Prof of Math and Physics, Univ. of Maryland

University of Maryland

Sixth Century Chair at University of Aberdeen

Professor for Theoretical Physics (em.), Potsdam University, Germany

Research Prof. University of Maryland

Distinguished Professor of Physics, University of California at Davis

Professor and Dean, R & D Centre, Vel Tech University, Chennai, INDIA

Professor of Theoretical Physics, Roma Sapienza

Professor of Physics, University of Wisconsin - Madison