From this website you can register for all events organized by the JRC.
If this is your first time using the system, you first will need to create a personal account in the on-line European commission's system (EULogin/ECAS) in order to obtain an account. The system will guide you through this procedure (a step-by-step guide is also available in the registration page: it may help you, link to the guide).
Please contact EULogin/ECAS directly if you have lost/forgotten your password or if you have problem with your log-in: https://webgate.ec.europa.eu/cas/contact.html
For technical issues only: JRC-REM-ADMIN@ec.europa.eu