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Evaluation-oriented information provision is a function performed by many systems that serve as personal assistants, advisors, or sales assistants. Five general tasks are distinguished which need to be addressed by such systems. For each task, techniques employed in a sample of systems are discussed , and it is shown how the lessons learned from these(More)
For the last two decades, configuration systems relying on AI techniques have successfully been applied in industrial environments. These systems support the configuration of complex products and services in shorter time with fewer errors and, therefore, reduce the costs of a mass-customization business model. The European Union–funded project entitled(More)
Recent advances in user modeling technology have brought within reach the goal of having systems adapt to temporary limitations of the user's available time and working memory capacity. We first summarize empirical research by ourselves and others that sheds light on the causes and consequences of these (continually changing) resource limitations. We then(More)
Bayesian networks have been successfully applied to the assessment of user properties which remain unchanged during a session. However, many properties of a person vary over time, thus raising new questions of network modeling. In this paper we characterize different types of dependencies that occur in networks that deal with the modeling of temporally(More)
In this paper, we show that Multi-Attribute Utility Theory (MAUT), a prescription for evaluating objects, can be ascribed as evaluation process to a user when estimating the user's interests. Some rules are proposed for the application of MAUT. Estimation of a user's interests in recommender systems is very important, because these interests are the basis(More)
The modeling of noncooperative dialogs, as opposed to dialogs in which the goals of the participants coincide, presents novel challenges to a pragmatically oriented dialog system. PRACMA models noncooperative sales dialogs. In the role of the potential buyer of a used car, the system tries to arrive at a realistic evaluation of the unknown car in spite of(More)
Situationally determined limitations in users' " resources " (e.g., time and working memory) constitute an increasingly important challenge to adaptive interfaces—one which does not yield easily to straightforward solutions. This article gives an overview of a research program that emphasizes empirically based understanding of this problem and the use of an(More)
This paper emphasizes on the enhancement of web-based selling technology for complex products. The approach of the EC-funded CAWICOMS 1 project is twofold: provision of technologies both for customer-adaptive Web-interfaces for the configuration of mass-customized products as well as for the integration of configuration systems along the supply-chain.(More)
BACKGROUND Short-acting anesthetic agents are suitable and commonly used in ocular surgery. Propofol and remifentanil are known to reduce intraocular pressure (IOP), but no information is available regarding the effects of sevoflurane combined with remifentanil on IOP. METHODS Therefore, a prospective, randomized study was conducted to compare the effects(More)