Forest SaVR – A Virtual-Reality Application to Raise Awareness of Deforestation

in Proceedings of the 17th GI VR/AR Workshop (VAR) (in press)

7th International Workshop on Self-Optimisation in Autonomic and Organic Computing Systems

in ARCS 2019 Workshop Proceedings (2019)

Mixed Reality - Potential and Pitfalls for Representing History

Presentation (2019)

Ontology Coverage Tool and Document Browser for Learning Material Exploration

in 2018 Thirteenth International Conference on Digital Information Management (ICDIM) (2018, September)

Document collections in e-learning can cause issues to both learners and teachers. On one hand, inquiry from the vast corpus of available resources is non-trivial without adequate formulation support and ... [more ▼]

Document collections in e-learning can cause issues to both learners and teachers. On one hand, inquiry from the vast corpus of available resources is non-trivial without adequate formulation support and semantic information. Implicit links between documents are hardly understood without a proper visualization. On the other hand, it is difficult for teachers to keep track of the topics covered by a large collection. In this paper, we present an ontology coverage tool and document browser for learning material exploration. Both learners and teachers can benefit from a visualization of an ontology and the documents related to the comprised concepts, overcoming the limitations of traditional file explorers. Guiding users through a visual query process, learners can quickly pinpoint relevant learning material. The visualization, which has been implemented as a web application using the D3.js JavaScript library, can be integrated into different e-learning applications to further enhance the workflow of learners. Finally, teachers are provided an overview of topic coverage within the collection. [less ▲]

Self-Improving System Integration – Status and Challenges After Five Years of SISSY

in Proceedings of the 12th IEEE International Conference on Self-Adaptive and Self-Organizing Systems (SASO) (2018)

Scientific Research on Self-Organising Systems - an Overview

Presentation (2018)

Socially-Sensitive Systems Design

in IEEE Technology & Society Magazine (2017), 36(3), 72-80

Yactul: An Extensible Game-Based Student Response Framework for Active Learning

in Ponencias del XVIII Encuentro Internacional Virtual Educa, Colombia 2017 (2017)

Student response systems as an active learning strategy have shown to be useful in different study domains. With the advent of gamification, these environments have become very popular to improve student ... [more ▼]

Student response systems as an active learning strategy have shown to be useful in different study domains. With the advent of gamification, these environments have become very popular to improve student engagement. However, existing solutions only provide a static set of activity types and limit their use to classrooms. In this paper, we present Yactul, an extensible game-based student response framework for active learning. Our ecosystem fosters continuous learning both in the collaborative setting of the classroom and the private study environment of the student. Our modular architecture enables a seamless integration of activities from a broad and extensible set. In addition, a mobile app for offline learning extends the experience outside the classroom and allows to replay quizzes anywhere and anytime, track the progress of an individual learner and suggest activities on topics that require more studying. [less ▲]

Fifth International Workshop on Self-Adaptive and Self-Organising Socio-Technical Systems (SASO^ST 2017)

in Proceedings of the 9th IEEE International Conference on Self-Adaptive and Self-Organizing Systems (SASO) (2017)

Enabling Near Real-Time Collaboration in a Distributed Multimedia Editing Environment

in Proceedings of the 12th International Workshop on Multimedia Technologies for E-Learning in conjunction with IEEE ISM 2017 (2017)

Computer-supported collaborative learning scenarios provide an opportunity for the participants to develop their conceptual understanding of a topic in a shared e-learning environment. This requires the ... [more ▼]

Computer-supported collaborative learning scenarios provide an opportunity for the participants to develop their conceptual understanding of a topic in a shared e-learning environment. This requires the integration of collaborative and cooperative authoring functionality for a wide range of distinct types of data, including multimedia. However, restricting access to currently manipulated elements by the means of locks and requiring the user to manually initiate and manage the synchronization process are still common side-effects to this support. Allowing for predominantly unrestricted, interruption-free and non-destructive multimedia editing in a distributed collaborative learning environment thus still presents a challenge. We propose to address these issues by integrating a fine-grained data model, concurrency-based command processing, and a primarily autonomous consistency management approach. Distinct editing operations by individual participants define manipulations on data type-specific attributes, which form the basis for an up-to-date representation of the targeted multimedia assets. We utilize an advanced Compound Document System and accompanying data models to allow for a feature rich, yet responsive and unobtrusive collaboration environment. [less ▲]