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1. INTRODUCTION Recording live lectures has proven to be a fast and efficient way of creating content for e-learning (Lauer & Ottmann, 2002). This content can be used in a number of ways ranging from simply augmenting a lecture to profoundly changing its didactic setting. See (Mertens et al., 2004 a) for an overview. A number of application scenarios aim(More)
Vector graphics are an ideal content format for slide based lecture recordings. File sizes can be kept small and graphics can be displayed in superior quality. Information about text and slide objects is stored symbolically which allows texts to be searched and objects on slides to be used interactively, e.g. for navigation purposes. The use of vector(More)
Lecture recordings can be a powerful addition to traditional lectures and they can even serve as a main content source in a number of didactic scenarios. If users can quickly locate relevant passages in a recording, the recording combines the ease of search that comes with electronic text based media with the authenticity and wealth of information that is(More)
In this paper, we present results from the experimental evaluation for the TRECVID 2011 MED11 (Multimedia Event Detection) task as a part of Team SRI-Sarnoff's AURORA system being developed under the IARPA ALADDIN Program. Our approach employs two classes of content descriptions for describing videos depicting diverse events: (1) Low level features and(More)
Transit nodes are ac oncept that has provent os peed up pathfinding in roadnetworks considerably.T he main idea of transit nodes is to precompute paths for selected routes and use these as shortcuts during the search. While this method can be employed for road networks that remain static overaperiod of time, it can not be directly applied to complexfast(More)