Socially-Sensitive Systems Design – Working Group on "Understanding Social Concepts in Self-Organising Systems"

in Dagstuhl Reports (2016), 5(11), 142-147

Structural Balance and Optimized Connectivity in Peer-to-Peer Massively Multiuser Virtual Environments

in Proceedings of the 6th ACM Multimedia Systems Conference (MMSys) (2015)

Socio-Inspired Design Approaches for Self-Adaptive and Self-Organizing Collaborative Systems

in Proceedings of the 9th IEEE International Conference on Self-Adaptive and Self-Organizing Systems (SASO) (2015)

Reusable Functional Modules for the Support of Active Learning

in Proceedings of the World Conference on Educational Media, Hypermedia and Telecommunications (EdMedia) (2014)

Context-based Authoring and Management of Documents

in Proceedings of the World Conference on E-Learning (E-Learn) (2013)

A Native Approach to Semantics and Inference in Fine-Grained Documents

in Proceedings of the 2nd Joint International Semantic Technology Conference (JIST) (2012)

Snippets and Component-Based Authoring Tools for Reusing and Connecting Documents

in Journal of Digital Information Management (2012), 10(6), 399-409

Sociality and Self-Organisation in Next-Generation Distributed Environments

Doctoral thesis (2011)

The proliferation of computationally powerful, interconnected devices entails a new generation of networked applications and social utilities characterized by a strong growth in scale and dynamics.<br ... [more ▼]

The proliferation of computationally powerful, interconnected devices entails a new generation of networked applications and social utilities characterized by a strong growth in scale and dynamics.<br />Distributed virtual environments constitute a privileged example, involving a high degree of interactivity as well as tightened constraints and requirements. As a response to these issues, this dissertation explores and substantiates sociality as a fundamental principle both in and for the design of such systems.<br />A specialized, dual peer-to-peer architecture is introduced, combining a highly-structured backbone overlay with a loosely-structured geometric client overlay synergistically complementing each other. To enable a global-scale, single-instanced environment, it is imperative to include as many client-side resources as possible and unburden the backbone. The focus of this dissertation therefore lies upon the latter, geometric overlay.<br />By taking an interdisciplinary perspective and leveraging different aspects of sociality, a series of self-organized approaches addressing major problem areas are proposed: a collaborative filtering mechanism for the handling of information overload created from the soaring amounts of users and objects; a confidentiality framework for the protection of sensitive data more likely exposed due to an increased interactivity; and two resource allocation schemes for fairly distributing surplus capacities in the face of critical regional surges.<br />Detailed evaluations show that these decentralized algorithms operate robustly and effectively, while yielding well-converging results in comparison to optimal, global-knowledge scenarios. [less ▲]

CoDE - An Application-Layer Framework for Confidentiality in Distributed Environments

in Proceedings of the 7th International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom) (2011)

Distance-Aware Avatar Interaction in Online Virtual Environments

in Proceedings of the 2nd International Conference on Advances in Future Internet (AFIN) (2010)