The conference desk is located in the main conference venue, the Kármán-Auditorium of RWTH Aachen University (Eilfschornsteinstraße 15, here is a map). This is the central source of information and assistance for all participants; in particular you receive your conference material there.
Opening hours:
Telephone: +49 241 80-93381
Email: info@or2014.de
In addition, there will be a welcome desk in the entrance hall of the main train station (Aachen Hbf):