A table for already-presented posters at ICASSP 2013.
A person or group of people devised a new process, a new way to apply math to a problem or a clever way to improve an existing solution to a problem. At least one of the people in the group spent time condensing six months of research (or more) onto a piece of shiny paper no bigger than four by six feet.
That then person flew from anywhere in the world to Vancouver, CA to stand in front of the shiny paper for around three hours and take potshots from passersby. Then the poster comes down to make room for the next and needs to go somewhere.
Welcome to academia! Throw your work on the pile.