Speakers: Guido Schaefer (PNA1) and Raphael Troncy (INS2)
Date: Thursday, April 2
Time: 13.00 - 14.00
Location: Euler Room (Z009)

Dear colleagues,

In next week's CWI Scientific Meeting we will have talks by Guido Schaefer and Raphael Troncy.
It is a lunchtime meeting, so sandwiches will be provided before the talk. We hope to see you there!

Best regards,

Ronald de Wolf and Willem Hundsdorfer


PROGRAM

Date: Thursday, April 2
Time: 13.00 - 14.00
Location: Euler Room (Z009)

Lecture 1: Guido Schaefer (PNA1),
"Soccer, Games and Computation"

Lecture 2: Raphael Troncy (INS2),
"Linked Media: Weaving multimedia objects into web applications using semantic annotations"


ABSTRACTS:
Lecture 1:
Game theory provides a tool-set of various models and solution concepts to study the effect of strategic behavior, but mostly neglects algorithmic issues such as computability, approximability, etc. These issues are taken into account additionally in algorithmic game theory, a rather new and flourishing research field that lies at the intersection of combinatorial optimization, algorithmics and game theory. In this talk, we will reconsider some classical game-theoretical examples and phenomena, but giving particular attention to computational issues.

Lecture 2 (tentative abstract):
Multimedia content is easy to produce but rather hard to find and to reuse on the Web. Digital photographs can be easily uploaded, communicated and shared in community portals such as Flickr, Picasa and Riya, while video are available on portals such as YouTube, DailyMotion, Metacafe or Vimeo to name a few. These systems allow their users to manually tag, comment and annotate the digital content, but they lack a general support for fine-grained semantic descriptions and look-up, especially when talking about things "inside" multimedia content, such as a sequence in a video or a person depicted in a still image.  In this talk, I will first describe ongoing work done within W3C for specifying a URI based-mechanism for addressing spatio-temporal fragments of multimedia content. I will then present formal models for annotating image and videos with concepts coming from controlled vocabularies or general background knowledge. I will finally show examples of an exploratory environment for searching and browsing collections of multimedia items that have been richly annotated at a fine-grain level.