How to reach Lyon: if you fly to Lyon Saint Exupery airport, you can easily reach Lyon by taking the express train Rhonexpress to the central Lyon Part-Dieu train station. You should follow the signs "Lyon Express" at the airport. There are trains every 15 minutes and the journey takes 30 minutes. You can find more information about the timetable and prices at the Rhonexpress website.
How to reach the IPNL (conference venue): take the tram T1 direction IUT Feyssine or T4 direction La Doua Gaston Berger and get off at the stop Universite Lyon 1.
If you are coming directly to the conference from the airport, the T4 stop is just next to the Rhonexpress stop at Part-Dieu. To get T1, you have to enter the train station, cross it and go to the other side.
From the tram stop Universite Lyon 1, you can walk to the IPNL: follow the tram track in the same direction that the tram goes and turn on the first road on the left. The IPNL (Paul Dirac Building) is down the road (click on the link below to see a map). It is written "PHYSIQUE NUCLEAIRE" on the building and is the last building on the left, just after "Maison d'Hôtes".
The "Amphi Dirac" is on the ground floor in front of the main entrance, the "Salle du Conseil" on the first floor.
You can find more information here.