Michael Hartle

DLH/CLLS: An Open, Extensible System Design for Prosuming Lecture Recordings and Integrating Multimedia Learning Ecosystems

The production of lecture recordings is becoming increasingly important for university education and highly appreciated by students. However, those lecture recordings and corresponding systems are only a subset of different kinds of learning materials and learning tools that exist in learning environments. This demands for learning system designs that are easily accessible, extensible, and open for the integration with other environments, data sources, and user (inter-)actions. The contributions of this paper is as follows: we suggest a system that supports educators in presenting, recording, and providing their lectures as well as a system design following Linked Data principles to facilitate integration and users to interact with both each other and learning materials.

Perspectives for lecture videos

This article presents an architecture for automated multi-perspective lecture recordings. The implementation switches between several video streams showing different perspectives in order to make the recording more vivid and to reduce the tunnel vision effect of single-perspective recordings. Automatic switching can be based on time intervals or, at a later stage of development, via simple recording rules.

Evaluating how students would use a collaborative linked learning space

Personal interaction with learning materials, (re-)arranging learning resources in a semantically meaningful way is important for comprehension and personal knowledge construction. Current learning systems only enable learners to add simple digital ink or text notes. How would users work with a system for collaboratively augmenting and semantically connecting learning materials with related knowledge resources? This paper presents user studies conducted with both students and educators to elicit users acceptance, needs and preferences regarding such a learning system.

Read/Write Lectures: Fostering Active Participation and Increasing Student Engagement in the Lecture Hall

In technology-enhanced lectures, the support of student engagement during lectures is still rudimentary compared to that of educators. Yet, participation and active learning are key factors for learning success. By applying the Web 2.0 paradigm of active participation to lectures, students become actively involved as both consumers and producers of learning resources. Based on a survey of related work, we propose a system that facilitates active participation and contribution to increase student engagement.

Describing Data Format Exploits Using Bitstream Segment Graphs

Exploits based on data processing bugs are delivered through crafted data that seems to follow a data format, yet is altered in some way to trigger a specific bug during processing, eg. in order to execute contained malicious code. Decomposing crafted data according to the purported data format and the function of its components that are not format-compliant is a step towards understanding the delivery mechanism of an exploit and fixing the vulnerable application. This paper demonstrates the use of bitstream segment graphs for describing the structure of exploits on the example of the TIFF Jailbreak exploit for the Apple iPhone and iPod Touch with firmware 1.1.1.

A collaborative linked learning space

Current learning systems typically do not allow students to combine learning materials with additional content, for example materials found on the web. We present a system that enables both educators and students to augment learning resources by creating meaningful links between them. In this way, both students and educators can benefit from the augmentations of others, and relate them to personal knowledge.

Introducing a Java-Based Simple API for Binary REpresentations (SABRE)

This paper presents the simple API for binary representations (SABRE) in its initial version 1.0. SABRE defines observer-pattern interfaces for processing hierarchically structured, binary-oriented documents, comparable to the simple API for XML (SAX). By modularizing processing steps into separate stages of a streaming pipeline, SABRE facilitates parsing, transforming and serializing of large binary documents. Its applicability for multimedia documents is demonstrated through its use case, the generation of Apple QuickTime multimedia documents, and an example for a selected portion of such a document is given