Virtpresenter is a system for recording lectures and for re-using recorded contents in other didactic scenarios. Here we demonstrate how the interaction of earlier visitors in form of footprints can be used for extracting relevant passages in time based media. We illustrate how to extract online web lecture snippets for enriching static contents of a course… (More)
This paper describes an approach to integrate lecture recordings, based on the virtPresenter framework, within social networks. A lot of social networks have recently begun to provide application programming interfaces (APIs) for external applications, allowing access to users' profile information and their friendship relations. The project " social… (More)
This work presents a web lecture systems that allows its users to visualize and re-use aggregated actions taken from user's past interaction for enhanced content navigation and multimedia retrieval.
User awareness has become a popular feature in many social web applications. In classic text-based web-systems, user awareness features show how many users are online in a web application or how many users are accessing the same web page. When time based media like web lectures are concerned this approach comes to its limits since time-based media are… (More)
Im Folgenden soll zunächst ein Überblick über die grundlegenden Konzepte sozialer Netzwerke und die Voraussetzungen für die in dieser Arbeit verwendeten Vorlesungsaufzeichnungen gegeben werden.
The undersigned hereby certify that they have read and recommend to the Faculty of Aerospace Engineering for acceptance a thesis entitled " Aeroelastic Roll Control for High Aspect Ratio Wings " Summary Modern aircraft tend to be light and slender. The high aspect ratio reduces the induced drag, increase fuel efficiency, and provide enough lift at low… (More)