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When the official session start time has been reached, start the session, great the audience, give some general instructions, make some announcements.Presenting authors are marked by the technical chair (P1 - presenting author of the first paper).Clarify how the discussion will take place (questions posted to the chat, people (virtually) raise their hands or the may ask directly on the audio channel - this is your decision, clarify it with you technical chairs and the presenting authors.Talk to presenting authors, get some information from them for their introduction, inform them about the timekeeping (how you will tell them how much time is left).
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As a session chair (or co-chair) you are responsible for a smooth session in a nice atmosphere.
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