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Currently, two different solutions for filesystems on flash storage exist: Flash Translation Layers in combination with traditional filesys-tems and log-structured flash file systems. This paper analyzes the weaknesses of both approaches and derives a number of requirements that help avoiding these weaknesses. Finally the basic concept of a tree structured… (More)
Web lectures are a form of educational content that differs from classic hypertext in a number of ways. Web lectures are easier to produce and therefore large amounts of material become accumulated in a short time. The recordings are significantly less structured than traditional web based learning content and they are time based media. Both the lack of… (More)
This paper introduces a complete hypermedia navigation concept for lecture recordings, along with virtPresenter, a prototype software tool for automatic generation of hypermedia user interfaces for lecture recordings. A special focus is on how navigation concepts of hypertext have to be modified in order to work with continuous media.
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)
Given the exponential growth of videos published on the Internet, mechanisms for clustering, searching, and browsing large numbers of videos have become a major research area. More importantly, there is a demand for event detectors that go beyond the simple finding of objects but rather detect more abstract concepts, such as "feeding an animal" or a… (More)
—In the current trend toward portable applications, high-integrated inductors are gaining a lot of importance. Using thin-film multilayer or multichip-module-deposition technology, high-circular inductors for RF and microwave applications may be integrated efficiently. Their quality factors may go up to over 100. In this paper, an accurate analytical model… (More)
Recently, the potentials of mobile devices have stirred interest in the e-learning community. This paper explores how podcasts can be used to enhance " classic " e-learning technology as well as how content can be produced, distributed and edited in a collaborative fashion.