Auflistung nach Autor:in "Krause, Daniel"
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- KonferenzbeitragAdaptive Portals: Adapting and Recommending Content and Expertise(16th Workshop on Adaptivity and User Modeling in Interactive Systems, 2008) Nauerz, Andreas; Bakalov, Fedor; König-Ries, Birgitta; Welsch, MartinToday, Portals provide users with a central point of access to companywide information. Initially they focused on presenting the most valuable and widely used information to users providing them with quick and efficient information access. But the amount of information accessible quickly grew and finding the right information became more and more complex and time consuming. In this paper, we illustrate options for adapting and recommending content based on user- and context models that reflect users’ interests and preferences and on annotations of resources provided by users. We additionally leverage the entire communitys’ interests, preferences and collective intelligence to perform group-based adaptation. We adapt a Portal’s structure (e.g. navigation) and provide recommendations to be able to reach content being of interest easier. We recommend background in- formation, experts and users with similar interests. We finally construct a Portal’s navigation structure entirely based on the communitys’ behavior. Our main concepts have been prototypically embedded within IBM’s WebSphere Portal.
- KonferenzbeitragAdaptive Reading Assistance for Dyslexic Students: Closing the Loop(15th Workshop on Adaptivity and User Modeling in Interactive Systems, 2007) Schmidt, Andreas; Schneider, MichaelAdaptive reading assistance can improve the reading performance of students, but current dyslexia pedagogical theories do not yet provide sound results on a micro-level. We want to provide a reading assistance solution that both helps the learner and the dyslexia researcher. In order to archive this, we encode adaptation knowledge in a descriptive way by making use of state-of-the-art ontology-based techniques. This enables a closed-loop approach of continuous improvement. In this paper, we want to present the overall approach as well as initial results of our work within the EU project AGENT-DYSL.
- KonferenzbeitragAdaptive Treemap Based Navigation Through Web Portals(16th Workshop on Adaptivity and User Modeling in Interactive Systems, 2008) Nauerz, Andreas; Schindler, Sirko; Bakalov, FedorToday, Portals most often present the navigation in form of tree-like structures to users. These trees follow a representation of data with a natural hierarchy. Single nodes are either parents or children. This representation style has several drawbacks: for reaching the leaves users have to traverse rather long paths. During the traversion of the tree users get often lost and, finally, the content relations remain unclear. It is not obvious where the ”most” content is located, too. We regard treemapping (a method for displaying tree-structured data using nested polygons) as a promising technology to overcome these draw- backs. We especially focus on adaptive treemaps displaying different treemaps to different users - always trying to satisfy each single users’ individual needs. Our main concepts have been prototypically embedded within IBM’s WebSphere Portal.
- KonferenzbeitragCapturing the needs of amateur web designers by means of examples(16th Workshop on Adaptivity and User Modeling in Interactive Systems, 2008) Hollink, Vera; de Boer, Victor; van Someren, MaartenMany sites are created by people who lack professional training in web design. We present ‘SiteGuide’, a tool that helps amateur web designers to decide which information will be included in a new web site and how the information will be organized. SiteGuide takes as input URLs of web sites from the same domain as the site the user wants to create. It automatically searches the pages of these example sites for common topics and common structural features. On the basis of these commonalities it creates a model of the user’s needs. The model can serve as a starting point for the new web site. Also, it can be used to check whether important elements are missing in a concept version of the new site and, if necessary, to adapt the initial design.
- KonferenzbeitragComputational Intelligence for Communication and Cooperation Guidance in Adaptive E-Learning Systems(16th Workshop on Adaptivity and User Modeling in Interactive Systems, 2008) Köck, MirjamAdaptivity has become a prominent research topic during the past decades. There is a variety of application areas where adaptation can add benefit to systems, reaching from shopping portals to e-learning platforms. Despite the large body of work, Computational Intelligence (CI) techniques have been under-explored and therefore also under-exploited within the area of useradaptive systems. This paper discusses the potential of employing CI approaches for the implementation of adaptivity within e-learning systems. Furthermore, it identifies scenarios where these techniques can improve the performance of an adaptive component. Specific focus is placed on the provision of guidance in e-learning systems, in particular with respect to communication/cooperation (as opposed to traditional focus on guiding learners through learning materials).
- KonferenzbeitragConcept of an adaptive training system for production(15th Workshop on Adaptivity and User Modeling in Interactive Systems, 2007) Odenthal, Barbara; Mayer, Marcel Ph.; Grandt, Morten; Schlick, Christopher M.
- KonferenzbeitragContext-adaptation based on Ontologies and Spreading Activation(15th Workshop on Adaptivity and User Modeling in Interactive Systems, 2007) Hussein, Tim; Westheide, Daniel; Ziegler, JürgenOntologies and spreading activation are known terms within the scope of information retrieval. In this paper we introduce SPREADR, an integrated adaptation mechanism for web applications that uses ontologies for representing the application domain as well as context information like location, user history and local time. Those context factors can be modeled in an ontology and be linked to certain domain nodes. In each session a Spreading Activation Network is build based on those ontologies and recognized con- text factors or user actions can trigger an activation flow through this network. A node’s resulting activation value then represents its importance according to the current circumstances. While identically in structure, the Spreading Activation Networks are personalized by automatically modifying link weights and activation levels of nodes. As a result the system learns about the user preferences and can adjust its adaptation mechanism for future runs through implicit feed- back.
- KonferenzbeitragDescribing User Actions in Adaptive Interfaces with Probabilistic Acceptors(16th Workshop on Adaptivity and User Modeling in Interactive Systems, 2008) Bezold, MatthiasAn important aspect of adaptive systems is the description of the user-system interaction, which can be used to derive new information about the user and to trigger adaptations, for instance by means of adaptation rules. In this paper, we present an approach that describes user actions by means of probabilistic deterministic finite- state automatons (PDFA), which are generated from an annotated corpus of user interactions. Based on a training set, different acceptors are created from recording data and can be employed by an adaptation framework to trigger adaptation rules. An evaluation of this approach with a prototype of an interactive TV system is presented.
- KonferenzbeitragEvaluating the Usability of Adaptive Recommendations(16th Workshop on Adaptivity and User Modeling in Interactive Systems, 2008) Weibelzahl, Stephan; Chihaia, DianaIn the design, development and evaluation of adaptive systems, usability aspects are largely ignored so far. A correct but badly designed adaptation decision might spoil the purpose. This paper provides an example of a usability evaluation with an adaptive collaborative system. The results suggest that the representation format of recommendations did not strongly affect standard usability measures. However, comparing different design versions helped users to identify strengths and weaknesses.
- KonferenzbeitragFine-grained user models by means of asynchronous web technologies(16th Workshop on Adaptivity and User Modeling in Interactive Systems, 2008) Hauger, DavidAlthough asynchronous HTTP technologies have grown in importance with the emergence of Web 2.0, most web-based Adaptive Hypermedia Systems (AHS) still exclusively use server- side monitoring of user behaviour to set up the user model. This paper discusses how asynchronous technologies and client-side observation may lead to more accurate and detailed user models, and how that might benefit next- generation AHS.