1. University of CologneCologneGermany
2. University of VaasaVaasaFinland
3. University of QueenslandBrisbaneAustralia
4. University of SalernoFiscianoItaly
5. Tsinghua UniversityBeijingPeople's Republic of China
6. Faculty of Engineering of the University of Porto and INESC TECPortoPortugal