1. Each Contributed Session is 80 minutes long with three papers or 100 minutes long with four papers. 

2. Each presenter is given 25 minutes, which includes the time for Q&A from the audience. 

3. A session chair and presenters may decide at their discretion whether questions can be asked during a presentation or should be deferred to the end of it.

1. Each Invited Session is 50 minutes long.

2. Each invited speaker is given 50 minutes, which includes the time for Q&A from the audience. 

3. A session chair and an invited speaker may decide at their discretion whether questions can be asked during a presentation or should be deferred to the end of it.