Burkhardt, Dirk; Stab, Christian; Steiger, Martin; Breyer, Matthias; Nazemi, Kawa
In: Kuijper, Arjan; Sourin, Alexei (Ed.): Proceedings of the 2012 International Conference on Cyberworlds (Cyberworlds 2012), pp. 261–267, IEEE, Piscataway, NJ, USA, 2012, ISBN: 978-0-7695-4814-2.
Nowadays a wide range of input devices are available to users of technical systems. Especially modern alternative interaction devices, which are known from game consoles etc., provide a more natural way of interaction. In parallel to that the research on visualization of large amount of data advances very quickly. This research was also influenced by the semantic web and the idea of storing data in a structured and linked form. The semantically annotated data gains more and more importance in information acquisition processes. Especially the Linked Open Data (LOD) format already experienced a huge growth. However, the user-interfaces of web-applications mostly do not reflect the added value of semantics data. This paper describes the conceptual design and implementation of an Interactive Exploration System that offers a user-centered graphical environment of web-based knowledge repositories, to support and optimize explorative learning, and the integration of a taxonomy-based approach to enable the use of more natural interaction metaphors, as they are possible with modern devices like Wii Mote or Microsoft Kinect. Therefore we introduce a different classification for interaction devices, and current approaches for supporting the added values in semantics visualizations. Furthermore, we describe the concept of our IES, including a strategy to organize and structure today's existing input devices, and a semantics exploration system driven by user-experience. We conclude the paper with a description of the implementation of the IES and an application scenario.
Nazemi, Kawa; Breyer, Matthias; Forster, Jeanette; Burkhardt, Dirk; Kuijper, Arjan
In: Smith, Michael J.; Salvendy, Gavriel (Ed.): Human Interface and the Management of Information. Interacting with Information, pp. 239–248, Springer Berlin Heidelberg, Berlin, Heidelberg, 2011, ISBN: 978-3-642-21793-7.
Semantically annotated data gain more and more importance in future information acquiring processes. Especially the Linked Open Data (LOD) format has already experienced a great growth. However, the user-interfaces of web-applications mostly do not reflect the added value of semantics data. The following paper describes a new approach of user-centered data-adaptive semantics visualization, which makes use of the advantages of semantics data combined with an adaptive composition of information visualization techniques. It starts with a related work section, where existing LOD systems and information visualization techniques are described. After that, the new approach will bridge the gap between semantically annotated data (LOD) and information visualization and introduces a visualization system that adapts the composition of visualizations based on the underlying data structure. A case study of an example case will conclude this paper.
Burkhardt, Dirk; Nazemi, Kawa; Breyer, Matthias; Stab, Christian; Kuijper, Arjan
In: Kurosu, Masaaki (Ed.): Human Centered Design, pp. 491–499, Springer, Berlin, Heidelberg, Germany, 2011, ISBN: 978-3-642-21753-1.
The Semantic Web is a powerful technology for organizing the data in our information based society. The collection and organization of information is an important step for showing important information to interested people. But the usage of such semantic-based data sources depends on effective and efficient information visualizations. Currently different kinds of visualizations in general and visualization metaphors do exist. Many of them are also applied for semantic data source, but often they are designed for semantic web experts and neglecting the normal user and his perception of an easy useable visualization. This kind of user needs less information, but rather a reduced qualitative view on the data. These two aspects of large amount of existing data and one for normal users easy to understand visualization is often not reconcilable. In this paper we create a concept for a visualization to show a bigger set of information to such normal users without overstraining them, because of layer-based data visualization, next to an integration of a Focus and Context metaphor.
Burkhardt, Dirk; Breyer, Matthias; Nazemi, Kawa; Kuijper, Arjan
In: Stephanidis, Constantine (Ed.): Universal Access in Human-Computer Interaction. Design for All and eInclusion, pp. 317–326, Springer, Berlin, Heidelberg, Germany, 2011, ISBN: 978-3-642-21672-5.
Searching information on web turned to a matter of course in the last years. The visualization and filtering of the results of such search queries plays a key-role in different disciplines and is still today under research.
In this paper a new approach for classifying the search intention of users’ is presented. The approach uses existing and easy parameters for a differentiation between explorative and targeted search. The results of the classification are used for a differentiated presentation based on graphical visualization techniques.
Nazemi, Kawa; Burkhardt, Dirk; Breyer, Matthias; Stab, Christian; Fellner, Dieter W.
In: Auer, Michael; Schreurs, Jeanne (Ed.): Proceedings of Interactive Computer Aided Learning (ICL 2010), pp. 163–173, International Association of Online Engineering (IAOE) Kassel University Press, Kassel, Germany, 2010, ISBN: 978-3-89958-541-4.
Semantic-Web and ontology-based information processing systems are established technologies and techniques, in more than only research areas and institutions. Different worldwide projects and enterprise companies identified already the added value of semantic technologies and work on different sub-topics for gathering and conveying knowledge. As the process of gathering and structuring semantic information plays a key role in the most developed applications, the process of transferring and adopting knowledge to and by humans is neglected, although the complex structure of knowledge-design opens many research-questions. The following paper describes a new approach for visualizing semantic information as a composition of different adaptable ontology-visualization techniques. We start with a categorized description of existing ontology visualization techniques and show potential gaps. After that the new approach will be described and its added value to existing systems. A case study within the greatest German program for semantic information processing will show the usage of the system in real scenarios.
Nazemi, Kawa; Breyer, Matthias; Burkhardt, Dirk; Fellner, Dieter W.
In: International Journal of Advanced Corporate Learning (iJAC), vol. 3, no. 4, pp. 26–34, 2010, ISSN: 1867-5565.
Semantic-Web technologies and ontology-based information processing systems are established techniques, in more than only research areas and institutions. Different worldwide projects and enterprise companies identified already the added value of semantic technologies, so they work on different sub-topics for gathering and conveying knowledge. As the process of gathering and structuring semantic information plays a key role in the most developed applications, the process of transferring and adopting knowledge to and by humans is neglected, although the complex structure of knowledge-design opens many research-questions. The customization of the presentation itself and the interaction techniques with these presentation artifacts is a key question for gainful and effective work with semantic information. The following paper describes a new approach for visualizing semantic information as a composition of different adaptable ontology-visualization techniques. We start with a categorized description of existing ontology visualization techniques and show potential gaps.
Stab, Christian; Breyer, Matthias; Nazemi, Kawa; Burkhardt, Dirk; Hofmann, Cristian Erik; Fellner, Dieter W.
In: Herrington, J.; Montgomerie, C. (Ed.): Proceedings of ED-MEDIA 2010 - World Conference on Educational Multimedia, Hypermedia & Telecommunications, pp. 911–919, Association for the Advancement of Computing in Education (AACE), Waynesville, NC, 2010, ISBN: 1-880094-81-9.
Ontologies have become an established data model for conceptualizing knowledge entities and describing semantic relationships between them. They are used to model the concepts of specific domains and are widespread in the areas of the semantic web, digital libraries and multimedia database management. To gain the most possible benefit from this data model, it is important to offer adequate visualizations, so that users can easily acquire the knowledge. Most ontology visualization techniques are based on hierarchical or graph-based visualization metaphors. This may result in information-loss, visual clutter, cognitive overload or context-loss. In this paper we describe a new approach of ontology visualization technique called SemaSun that is based on the sunburst visualization metaphor. We improved this metaphor, which is naturally designed for displaying hierarchical data, to the tasks of displaying multiple inheritance and semantic relations. This approach also offers incremental ontology exploring to reduce the cognitive load without losing the informational context.
Burkhardt, Dirk; Hofmann, Cristian Erik; Nazemi, Kawa; Stab, Christian; Breyer, Matthias; Fellner, Dieter W.
In: Herrington, J.; Montgomerie, C. (Ed.): Proceedings of ED-MEDIA 2010--World Conference on Educational Multimedia, Hypermedia & Telecommunications, pp. 860–869, Association for the Advancement of Computing in Education (AACE), Waynesville, NC, 2010, ISBN: 978-1-880094-81-5.
Ontologies are used to represent knowledge and their semantic information from different topics, to allow users a better way to explore knowledge and find information faster, because of the data-structuring. To achieve a well filled knowledgebase, editors have to be used, to enter new and to edit existing information. But most of the existing ontology-editors are designed for experienced ontology-experts. Experts from other topic fields e.g. physicians are often novices in the area of ontology-creating, they need adequate tools, which hide the complexity of ontology-structures. In the area of e-learning experts are also teachers as well. In this paper we will present a method, how the needs of domain-experts can be regarded and so an editor can designed, which allows an editing and adding of information by users without having experiences of creating ontologies. With such an editor domain-experts are able to commit their expert-knowledge into the ontology.
Dipl.-Inf. Dirk Burkhardt
Max-Planck-Str. 2, 64807 Dieburg
Building F16 / Office 1.21