Fraunhofer-Institut für Angewandte Informationstechnik FIT

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  • Publication
    Towards a framework for distributed user modelling for ubiquitous computing
    ( 2005)
    Specht, M.
    ;
    Lorenz, A.
    ;
    Zimmermann, A.
    This paper introduces a framework for distributed user modelling in ubiquitous computing. Regarding the requirements in ubiquitous computing, communication details are not fixed per se or even unknown during the system specification phase. Hiding the technology within specialized components allows for unique migration of information between the components and releases system developers from considering specific properties and protocols. Supporting efficient development of applications, the distributed components are able to react both to their environment and to messages received from neighbouring components.
  • Publication
    Personalization and context-management
    ( 2005)
    Zimmermann, A.
    ;
    Lorenz, A.
    ;
    Specht, M.
    Supporting the individual user in his working, learning, or information access is one of the main goals of user modeling. Personal or group user models make it possible to represent and use information about preferences, knowledge, abilities, emotional states, and many other characteristics of a user to adapt the user experience and support. Nowadays, the disappearing computer enables the user to access her information from a variety of personal and public displays and devices. To support a new generation of contextualized and personalized information and services, this paper addresses the problem of context management. Context management is a new approach to the design of context-aware systems in ubiquitous computing that combines personalization and contextualization. The presented framework for context management integrates user modeling and context modeling, which can benefit from each other and give rise to more valid models for personalized and contextualized information delivery. The paper will introduce a base framework and tools for designing context-aware applications and decompose the underlying framework into its foundational components. As two illustrative application cases, the paper discusses implementations of an intelligent advertisement board and an audio-augmented museum environment.
  • Publication
    Applications of a context-management system
    ( 2005)
    Zimmermann, A.
    ;
    Lorenz, A.
    ;
    Specht, M.
    In ubiquitous computing, the user will be interrupted in performing a task only if the information is relevant to the task or highly important in the situation to justify the interrupt. The information selection and presentation therefore should be adapted to the user and his current context of use. Nowadays, uncounted Content-Management Systems provide access to a large amount of information, but without context, information is just data. This paper introduces Context-Management as a new approach for the design of contextaware systems in ubiquitous computing. As a proof of concept we illustrate three prototypical implementations of contextualized information systems in different applications domains and decompose the underlying framework into its foundational components.
  • Publication
    Contextualized virtual science centers
    ( 2005)
    Zimmermann, A.
    ;
    Lorenz, A.
    ;
    Specht, M.
    Today it is not enough just to supply content without the consideration of the recipient, his/her current task and situation. Therefore the time, the location, the particular technical limitations, and the modality and style of reception are important parameters for contextualized interactions and information delivery. Context-sensitive content and information processing is especially an asset for the generation of added value in information delivery. This chapter describes how contextualization can be performed in virtual science centers. The demand for context-sensitive functionalities constitutes a crucial challenge for application developers, system integrators and product designers. This chapter furthermore offers a potentially substantive approach for development and maintenance of context-sensitive systems and services by adapting information brokering techniques.
  • Publication
    User modeling in adaptive audio-augmented Museum Environments
    ( 2003)
    Zimmermann, A.
    ;
    Lorenz, A.
    ;
    Specht, M.
    The paper illustrates approaches for making audio-augmented museum environments adaptive. Based on well-known user modeling techniques we present a combination of suitable components that adapt audio information to the interests, preferences and motion of a museum's visitor. The underlying environment, i.e. the carrier and transmitter of information, is provided by the LISTEN system, which enables the augmentation of everyday environments with audio information.
  • Publication
    The use of an information brokering tool in an electronic museum environment
    ( 2003)
    Zimmermann, A.
    ;
    Lorenz, A.
    ;
    Specht, M.
  • Publication
    Reasoning from contexts
    ( 2002)
    Zimmermann, A.
    ;
    Lorenz, A.
    ;
    Specht, M.