researcher at the institute of environmental sciences, Leiden Iniversity

Professor of Resource Management, TU Wien (Vienna University of Technology)

Professor Emeritus, Vienna University of Technology

Chair Professor, Peking University; Adjunct Professor, University of Southern Denmark

Technical University of Denmark

Beijing Normal University

Chalmers University of Technology

Lecturer in Building Engineering, University of Lleida, Spain.

Massachusetts Institute of Technology

Fraunhofer Institute for Systems and Innovation Research ISI