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The Virgilio software system is a general purpose exploration tool for large collections of complex structured data. It generates visualisations of the results of a query to a database by the help of virtual reality objects, embedded into... more
The Virgilio software system is a general purpose exploration tool for large collections of complex structured data. It generates visualisations of the results of a query to a database by the help of virtual reality objects, embedded into predefined virtual reality scenarios. This document describes the design, specification, and implementation of the Metaphor Definition Tool. This component of the Virgilio software system has to identify the most suitable virtual worlds for representing the result of a query. This is achieved by considering the metaphor definition task as a general constraint satisfaction problem. The logical formalism adopted to describe interrelationships among the involved objects corresponds to that of the Prolog programming language, in order to take advantage from its built in backtracking strategy. This paper presents the overall Virgilio architecture, provides a brief introduction to the concept of metaphor and its use within the Virgilio environment, contains a description of the MDT as well as a description of the repositories, and explains how to integrate the MDT into the whole system. Two complex mapping examples are also introduced.
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In the domain of cultural heritage, a lot of archives and data collections already exist. Thus, one of the main challenges for curators and archivists in this domain consists of exchanging data with other archives and integrating similar... more
In the domain of cultural heritage, a lot of archives and data collections already exist. Thus, one of the main challenges for curators and archivists in this domain consists of exchanging data with other archives and integrating similar collections. Typical usage scenarios in this area can only be realized by semantically integrating all available data sources. Therefore, the main task of semantic integration consists of bridging the different levels of heterogeneity. Semantic Web technologies might be a solution for these challenges. Ontology Matching, for example, is already successfully applied for bridging some of the heterogeneity types. However, it is not suitable for dissolving heterogeneity conflicts at all levels due to unsatisfactory matching qualities. Still, matching is crucial for the semantic integration success of the distributed data sources. As a result, a main part in semantic integration is still done manually by domain experts. It would be preferable to support their work by at least semi-automatic techniques.
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This working paper is concerned with design, implementation, and initial evaluation of QBL4Moodle, a software solution for Qualifications-Based Learning (QBL) that has been developed as an extension for the open-source Learning Management... more
This working paper is concerned with design, implementation, and initial evaluation of QBL4Moodle, a software solution for Qualifications-Based Learning (QBL) that has been developed as an extension for the open-source Learning Management System Moodle. QBL is a Competence/Qualifications (CQ) based approach developed at the FernUniversitat in Hagen; a detailed introduction is given in chapter 2. Chapter 3 covers the integration/implementation concept consisting of a mapping between the QBL data model and Moodle’s database scheme, an architectural overview of QBL4Moodle, and an implementation plan. Section 4 presents the resulting prototype in form of an initial user manual; insights gained during early evaluation activities (live-demos, cognitive walkthroughs) are discussed in chapter 5. The concluding section 6 contains a brief summary and gives an outlook on future development cycles.
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Abstract: This paper recommends an approach to synchronize 3D Information Visualization (IVIS) and heterogeneous data sources based on the Mediator-Wrapper architectural pattern. In addition, a bidirectional extension of the IVIS... more
Abstract: This paper recommends an approach to synchronize 3D Information Visualization (IVIS) and heterogeneous data sources based on the Mediator-Wrapper architectural pattern. In addition, a bidirectional extension of the IVIS Reference Model, as proposed by Card et al. (1999), is introduced. Moreover, a prototypical implementation of the proposed IVIS infrastructure is presented utilizing the bidirectional WebSocket support of the open-source Spring framework. To establish an interactive 3D visual user interface, ISO standard X3D is embedded into an exemplary Web browser application with the help of the X3DOM JavaScript library.
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Die graduelle Zugehorigkeit, das Kernkonzept der unscharfen Logik, kann in der Datenvisualisierung genutzt werden, um Zusammenhange zwischen Merkmalen und Zielklassen darzustellen. Solche Zugehorigkeitsfunktionen konnen mit der... more
Die graduelle Zugehorigkeit, das Kernkonzept der unscharfen Logik, kann in der Datenvisualisierung genutzt werden, um Zusammenhange zwischen Merkmalen und Zielklassen darzustellen. Solche Zugehorigkeitsfunktionen konnen mit der IFC-Filter-Methode direkt aus den Daten extrahiert werden. Die Visualisierung dieser Zusammenhange leuchtet ein, und prasentiert den Entscheidungstragern eine leicht verstandliche Darstellung. In Smart Energy-Systemen kann diese angewendet werden, um komplexe Vorhersagemodelle nachvollziehbar zu machen, und fordert somit die Datenintelligenz. An einem Fallbeispiel einer Datenanalyse in der Energiewirtschaft wird aufgezeigt, wie die Datenvisualisierung mit dem IFC-Filter in der Praxis aussehen kann. Dieses Kapitel stellt zudem den Bezug zu Big Data Management her, indem es die Datenvisualisierung fur Smart Energy im groseren Zusammenhang eines Referenzmodells einordnet.
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Recent studies by Amgen and Bayer showed that only 11% and 25% respectively of reviewed cancer research projects produced scientifically valid results. The awareness of this fact is accompanied by increasingly stringent regulations, which... more
Recent studies by Amgen and Bayer showed that only 11% and 25% respectively of reviewed cancer research projects produced scientifically valid results. The awareness of this fact is accompanied by increasingly stringent regulations, which enforce compliance to ensure the ability to validate research results through its proper reproducibility. Furthermore, research undertakings in this field are expensive and the return on investment needs to be secured by research purchasers through proper management of the knowledge that is required for long term result reuse. For example, the provision of personalised medicine is tightly interwoven with the execution of laborious molecular diagnostic assays besides the comprehensive access to all constituents of it to enable full result reproducibility for its later validation. Hence, a key factor for successful utilization of assay findings is a comprehensive preservation support of assay results together with all relevant information that come into existence throughout the phases of an assay lifecycle. The provision of tools and services that provide comprehensive preservation functionalities will dramatically increase the effective support research of personalised medicine in cancer care through improved reproducibility capabilities for later validation.
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ABSTRACT Supporting collaborative multimedia content management activities, as e.g., image and video acquisition, exploration, and access dialogues between naive users and multi media information systems is a non-trivial task. Although a... more
ABSTRACT Supporting collaborative multimedia content management activities, as e.g., image and video acquisition, exploration, and access dialogues between naive users and multi media information systems is a non-trivial task. Although a wide variety of experimental and prototypical multimedia storage technologies as well as corresponding indexing and retrieval engines are available, most of them lack appropriate support for collaborative end-user oriented user interface front ends. The development of advanced user adaptable interfaces is necessary for building collaborative multimedia information-space presentations based upon advanced tools for information browsing, searching, filtering, and brokering to be applied on potentially very large and highly dynamic multi media collections with a large number of users and user groups. Therefore, the development of advanced and at the same time adaptable and collaborative computer graphical information presentation schemes that allow to easily apply adequate visual metaphors for defined target user stereotypes has to become a key focus within ongoing research activities trying to support collaborative information work with multimedia collections.
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ABSTRACT
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ABSTRACT
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Development of an educational game that can be integrated into a course within a Learning Management System (LMS) is a challenging task both from the didactic and from the technical point of view. A thorough evaluation of students'... more
Development of an educational game that can be integrated into a course within a Learning Management System (LMS) is a challenging task both from the didactic and from the technical point of view. A thorough evaluation of students' playing performance on LMS-side requires informative user-specific data that have to be collected during gameplay and then transferred to the LMS. Standardized interaction technologies like Learning Tools Interoperability (LTI) specify mechanisms that can be applied for implementing functionality to exchange students' competence profiles and traces. The KnowledgeManagement Eco-System Portal of the European funded RAGE (Realizing an Applied Gaming Ecosystem) Research and Innovation Action project provides capable components, assets and related utility packs for developing such functionality: besides a toolkit for creating competence based games that meet the requirements of Qualifications Based Learning (QBL), assets for storing individual player profiles and traces are available. Furthermore, tools for creating game-specific analytics are provided that can be embedded by LTI-compatible LMSs like Moodle. This paper is concerned with the integration of QBL-compliant competence based games into LMS-courses. A major topic is the description of an exemplar Moodle-plugin with its required functionality and interfaces to the above-mentioned RAGE assets. As the approach is not yet implemented, this paper remains on a conceptual level.
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LyberWorld is a prototype II? user interface. It implements visualizations of an abstract information space: fttlltext. The video demonstrates a visual user interface for the probabilistic fulltext retrieval system INQUERY. Visualizations... more
LyberWorld is a prototype II? user interface. It implements visualizations of an abstract information space: fttlltext. The video demonstrates a visual user interface for the probabilistic fulltext retrieval system INQUERY. Visualizations are usedto communicate information search and browsing activities in anatural way by applying metaphors of spatial navigation in abstract information spaces.Visualization tools for exploring information spaces and judging relevance of information items are introduced andan example session demonstrates the prototype. The presence of a spatial model in the user’s mind is regarded as an essential contribution towards natural interaction and reduction of cognitive costs during retrieval dialogues.