http://dl.gi.de/handle/20.500.12116/28337 2026-07-23T08:39:14Z 2026-07-23T08:39:14Z Kop, Christian Vöhringer, Jürgen Hölbling, Martin Horn, Thomas Mayr, Heinrich C. Irrasch, Christian http://dl.gi.de/handle/20.500.12116/28359 2019-10-11T08:54:17Z 2005-01-01T00:00:00Z

Tool supported extraction of behavior models Kop, Christian; Vöhringer, Jürgen; Hölbling, Martin; Horn, Thomas; Mayr, Heinrich C.; Irrasch, Christian Kaschek, Roland; Mayr, Heinrich C.; Liddle, Stephen Information system projects often suffer from incomplete or inadequate requirements specifications. In our opinion, which is supported by practical experience, these problems result from the fact that the models usually applied for requirements analysis are to abstract as to be easily understood and validated by the business owners, i.e. the end users. In addition to that, validation is often hampered by the fact that traditional modeling approaches do not relate the particular model elements to their corresponding requirements sources. We, therefore, propose an approach that uses a lean and thus more transparent requirements model, which is intermediate in the sense that it has to be mapped, after validation, to one of the traditional conceptual models. Clearly introducing such an additional step into the information system development process induces increased effort which has to be reduced by appropriate tool support. This paper concentrates on specific aspects and tool support for extracting behavior models out of requirements texts.

2005-01-01T00:00:00Z Georgievski, Mladen Sharda, Nalin http://dl.gi.de/handle/20.500.12116/28356 2019-10-11T08:54:17Z 2005-01-01T00:00:00Z

Enhancing user experience for networked multimedia systems Georgievski, Mladen; Sharda, Nalin Kaschek, Roland; Mayr, Heinrich C.; Liddle, Stephen As networked multimedia systems have evolved over the recent years, sophisticated multimedia applications have emerged. Through this, a revolution in the transmission of multimedia information over wired and wireless communication technologies has transpired. Society is now becoming more dependent on such technologies, and these are used in almost every aspect of our daily lives, including: communications, entertainment, education, marketing, research, health and medicine. To provide the user with effective experience in using these networked multimedia applications, it is imperative that optimum Quality of Service (QoS) is delivered. This requires innovative solutions for QoS management. These solutions need to employ better Human Computer Interaction (HCI) techniques and bridge the current gap between the user requirements and the system functionality. In our research, we have developed a Three Layer Quality of Service (TRAQS) model and defined a framework for QoS management of networked multimedia systems. A novel interface called the Quality Cost and Temporal Triangle (QCTT) has been implemented to provide the user with the ability to control the QoS in real-time. Furthermore, we have conducted a usability study in the application of the QCTT model for specifying and managing QoS. This paper articulates the need for developing novel QoS management models; presents the results of usability study carried out on one such model, i.e. the Quality Cost and Temporal Triangle; and discusses the benefits that can flow towards more effective deployment of networked multimedia applications.

2005-01-01T00:00:00Z Kirchberg, Markus Schewe, Klaus-Dieter Tretiakov, Alexei http://dl.gi.de/handle/20.500.12116/28358 2019-10-11T08:54:17Z 2005-01-01T00:00:00Z

Using XML to support media types Kirchberg, Markus; Schewe, Klaus-Dieter; Tretiakov, Alexei Kaschek, Roland; Mayr, Heinrich C.; Liddle, Stephen The eXtensible Markup Language (XML) has drawn significant attention in research and practice of databases and web-based information systems. At the same time, lots of work has been investigated in conceptual modelling for web-based information systems which is at most loosely coupled with XML. One such research direction has led to the theory of media types, which has proven itself to be useful for the design and development of large and maintainable web-based information systems. The research reported in this article investigates how XML and the theory of media types could be brought together, i.e. how XML could be used to support media types. It turns out that some of the striking features of media types are not yet well supported by XML. Therefore, severals extensions to XML such as subelements, update operations, schema updates, views, media elements and adaptivity will be suggested in this article in order to close this gap.

2005-01-01T00:00:00Z Hinze, Annika Junmanee, Saijai http://dl.gi.de/handle/20.500.12116/28357 2019-10-11T08:54:17Z 2005-01-01T00:00:00Z

Travel recommendations in a mobile tourist information system Hinze, Annika; Junmanee, Saijai Kaschek, Roland; Mayr, Heinrich C.; Liddle, Stephen An advanced mobile tourist information system delivers information about sights and events on a tourists travel route. The system should be personalized in its interaction with the tourist. Data that can be used for personalization are: the tourists interest profile, an analysis of their travel history, and the tourists feedback about sights. Existing mobile information systems for tourists do not tailor their information delivery to the tourists interests. In this paper, we propose the use of personalised recommendations that consider all of the personal information a tourist provides. We adopt and modify techniques from recommender systems to the new application area of mobile tourist information. We propose a number of methods for personalised recommendations; and select a subset of these for implementation. This paper then presents the implemented recommender component of our TIP system for mobile tourist information.

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