Jürgen Tacken

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This paper describes the hierarchical, graphical SEA Language. The SEA Language relies on extended Predicate Transition Nets that unambiguously deene the semantics of graphical system speciica-tions. These nets are also used as a basis for simulating/animating system speciications. The SEA Language allows to easily incorporate several user deened or(More)
—In the near future, the trend of user-generated content and services currently observable in the Internet domain will also affect the mobile environment: mobile users will become able to easily create content and small services while on the move and offer them to social communities. Mobile users will no longer be pure consumers, they will also become(More)
This paper addresses the specification of security modules in a Mobile Digital Rights Management (DRM) approach with a focus on copy detection mechanisms. The presented DRM approach aims at enhancing the latest DRM standard of the Open Mobile Alliance (OMA). In particular, we present a completed DRM infrastructure, introduce additional entities for billing(More)
Dasi nternationale Forschungsprojekt uService entwickelt Werkzeuge, mitd enen Nutzer über ihreH andysm obile Dienstef ür sich unda ndere Nutzer erstellenkönnen. Diedeutschen Projektpartner konzentrieren ihreArbeitenauf den Anwendungsbereichder individuellenG esundheitsvorsorge durchSport, insbeson-dere Laufen.E ss olle ineP lattforme ntwickeltw erden, überd(More)
This article presents the potential for new business models in the context of user-generated content and services in the mobile environment. The approach is based on the concept of a new platform that incorporates multiple (mobile) network providers as well as private and commercial third party content and service providers. The potential for gaining and(More)
In this article we present a new approach for the design of hybrid systems composed of discrete and continuous parts. In our approach the system designers can start their speciications with the discrete as well as with the continuous parts. Both paradigms can be used with there own methodology and Tools. There are integration mechanisms for both paradigms.(More)
Personalized and context-aware services are of high interest for Mobile Network Operators (MNOs) to keep existing and win new subscribers. Although such services are already available, they are frequently offered by third parties in a rather stand-alone manner. The challenge is to come up with appropriate interfaces that allow (a) third parties to offer(More)