Resident Faculty Member, Santa Fe Institute

Research Director, Institute for Complex Systems, Rome

CFTC, Departamento de Física, Faculdade de Ciências, Universidade de Lisboa

Assistant Professor, The Nordic Institute for Theoretical Physics

SSSUP, CNR, Cambridge, Duke, UNIPI, INFM, UNT, NIST

Stockholm University

professor, Institute of Physics, University of Opole

Memorial University of Newfoundland, St. John's, NL, Canada

Charles University

Institute for Theoretical Physics - University of Cologne