Founder of the Institute for Scientific Information

Centre for Science and Technology Studies, Leiden University

College of Computing and Informatics, Drexel University

Professor, University of Szeged, Óbuda University, Hungary, University of Novi Sad, Serbia

National Taiwan University of Science and Technology

Wise Lab, Dalian University of Technology（大连理工大学WISE实验室）

Hacettepe University Department of Information Management (Ret.)

Retired, Tenured, Full Professor

Professor, Drexel University

Leipzig University of Applied Sciences