When a scientist visits another university to give a seminar, someone
gets assigned as host who during the talk introduces the speaker,
makes sure the talk doesn't go too long and the post-talk questions
don't get out of hand.
So how do you introduce a speaker? I've seen everything from
"Let's start" to a reading of the speaker's CV. A few
memorable ones (names have been changed):
Jane Smith needs no introduction so I'll introduce myself
instead…
Last week we had a terrible talk on ABC, today we will
learn whether it was the speaker or the area.
John Doe is famous for proving the XYZ theorem. Today he will talk
about something far less interesting.
Often the host gets much more anxious about the introduction than the
speaker does about the talk. The host worries the speaker will get
insulted if given the wrong introduction. Just find a couple of nice
things to say and you'll be fine.
Don't ask the speaker how he would like to be introduced, as it puts
the speaker in an awkward position. Last time my host asked me, I
suggested he introduce me as "The person who put the 'W' in
AWPP,"
but he didn't bite.