David, K.; Lau, S. L. & Klein, B. N.: Social Link App. In: IEEE Vehicular Technology Magazine 6 (2011), Nr. 3, S. 80-87

In less than two decades, mobile communication has developed from a niche application to a mass-market high-tech product, having experienced an unprecedented growth never achieved by any other technology, whether radio, television, or even the Internet.

Klein, N.; Lau, S. L. & David, K.: Evaluation of the Influence of Time Synchronisation on Classification
arning Based Movement Detection with Accelerometers. The 11th IEEE/IPSJ International Symposium on Applications and the Internet. Munich, Germany: 2011

Klein, N. & David, K.: Basic Approach of Timing in Context Aware Architectures verified by concrete Advantages. Proceedings of The 10th Annual International Symposium on Applications and the Internet. 2010

Klein, N.; Sigg, S.; David, K. & Beigl, M.: DAG Based Context Reasoning: Optimised DAG Creation. Proceedings of Workshop on Context-Systems Design, Evaluation and Optimisation. ARCS 2010 - Architecture of Computing Systems. Hannover, Germany: 2010

Klein, N. & David, K.: Time Locality: A Novel Parameter for Quality of Context. Proceedings of Seventh International Conference on Networked Sensing Systems. 2010

Lau, S. L.; Klein, N.; Pirali, A.; Droegehorn, O. & David, K.: Evaluation of the Technology Agnostic Service Creation Approach. Selbstorganiserende, adaptive, kontextsensitive verteilte Systeme 2010 (SAKS2010). Electronic Communications of the EASST, 2010 (27)

Pirali, A.; Klein, N.; Lau, S. L. & David, K.: The context sensitive shopping list. Proceedings of Multikonferenz Wirtschaftsinformatik (MKWI 2010). Göttingen, Germany: 2010, S. 987-997

Lau, S. L.; Klein, N.; Pirali, A.; König, I. & David, K.: Implementation of a User-Centric Context-Aware Playground. Workshops der Wissenschaftlichen Konferenz Kommunikation in Verteilten Systemen 2009 (WowKiVS 2009). Electronic Communications of the EASST, 2009 (17)

Droegehorn, O.; Lau, S. L.; Klein, N.; Koenig, I. & Porras, J.: Service creation for end-users. In: Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on (2008), S. 1-5

The current computing and communication services are driven by various technologies. The creation of such services is however not an easy task. The different platforms lack openness that simplifies interoperability. Service development is still mainly technical oriented, where service creation tools are meant for serving and assisting the professional developers. Service creation is not seen as a task for end users right now. In this paper we will discuss how end users could be enabled to create new services, shown on the example within a mobile context-aware service platform. This is achieved by introducing the concept of the technology agnostic approach into the process. We present the conceptual architecture and explain the idea of end-user driven service creation that can provide a solution. Several tools were designed and implemented to prove that the concepts work. With the help of semantic service description, the end users can express their service wishes and create services using a graphical interface technology agnostically. The idea was implemented in two European projects and we have identified the next steps to improve the prototypes as well as the idea. Based on several tools and an underlying platform the ideas have been tested in a development environment for mobile context-aware services. Here end-users are able to design their own services or combine existing services, which can be shared and used by other users later on.

Klein, B. N.; Lau, S. L.; Pirali, A.; Löffler, T. & David, K.: DAGR - DAG Based Context Reasoning: An Architecture for Context Aware Applications. ASWN '08: Proceedings of the 2008 Eighth International Workshop on Applications and Services in Wireless Networks. Washington, DC, USA: IEEE Computer Society, 2008, S. 20-25

Lau, S. L.; Klein, N.; Pirali, A.; Koenig, I.; Droegehorn, O. & David, K.: Making Service Creation for (Almost) Everyone. ICT-Mobile Summit 2008. Stockholm: 2008

Böttcher, S.; Steinmetz, R. & Klein, N.: XML index compression by DTD subtraction. In: Cardoso, J.; Cordeiro, J. & Filipe, J. (Hrsg.): ICEIS (1). 2007, S. 86-94
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Klein, N.; Groppe, S.; Böttcher, S. & Gruenwald, L.: A Prototype for Translating XQuery Expressions into XSLT Stylesheets. In: Eder, J.; Haav, H.-M.; Kalja, A. & Penjam, J. (Hrsg.): ADBIS. Springer, 2005 (Lecture Notes in Computer Science 3631), S. 238-253
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