Imam Khomeini International University, Iran.

University of Calgary, Canada.

Power & Water Institute of Technology, Iran.

Lahore University of Management Sciences, Pakistan.

University of Ghent, Belgium.

Ghent University, Belgium. Research project: intelligent information technologies for the internet.

Nagoya University, Japan.

Los Alamos National Laboratory, USA.

University of Magdeburg, Germany.

University of Southern Carolina, USA.

University of California - Berkeley, USA.