Publikationen

Hier finden Sie von Know-Center MitarbeiterInnen verfasste wissenschaftliche Publikationen

2015

Wesiak Gudrun, Al-Smadi Mohammad, Gütl Christian, Höfler Margit

CSCL in non-technological environments: Evaluation of a Wiki system with integrated self- and peer assessment.

Proceedings of InPACT 2015 (International Psychological Applications Conference and Trends 2015), Ljubljana, Slovenia Cite this publication Gudrun Wesiak, 2015

Konferenz
Computer-supported collaborative learning (CSCL) is already a central element of online learningenvironments, but is also gaining increasing importance in traditional classroom settings where coursework is carried out in groups. For these situations social interaction, sharing and construction ofknowledge among the group members are important elements of the learning process. The use ofcomputers and the internet facilitates such group work by allowing asynchronous as well as synchronouscontributions toto foster CSCL is the employment of Wiki systems, e.g. for collaboratively working on a writingassignment. We developed an enhanced Wiki system with self- and peer assessment, visualizations, and-science students showed its usefulness for collaborative course work. However, results from studies withtech-savvy participants, who are typically familiar with the benefits as well as drawbacks of such tools,are often limited regarding the generalizability to other populations. Thus, we introduced the Wiki in anon-technological environment and evaluated it with respect to usability, usefulness, and motivationalcomponents. Thirty psychology students used the co-writing Wiki to work collaboratively on a shortpaper. Besides providing an interface for generating and changing a document, the co-writing Wiki offerstools for formative assessment activities (integrated self-, peer-, and group assessment activities) as well-data(activity tracking) as well as questionnaire data gathered at before and after working with the Wiki.Additionally, the instructor evaluated the co-writing Wiki concerning its usefulness for CSCL activities inacademic settings. Despite technical problems and consequently low system usability scores, participantsperceived the offered functionalities as helpful to keep a good overview on the current status of theirpaper and the contributions of their group members. The integrated self-assessment tool helped them toget aware of their strengths and weaknesses. In addition, students showed a high intrinsic motivationwhile working with the co-Writing Wiki, which did not change over the course of the study. From the-writing Wiki allowed to effectively monitor the progress of the groups andenabled formative feedback by the instructor. Summarizing, the results indicate that using Wikis forCSCL is a promising way to also support students with no technological background.environments, but is also gaining increasing importance in traditional classroom settings where coursework is carried out in groups. For these situations social interaction, sharing and construction ofknowledge among the group members are important elements of the learning process. The use ofcomputers and the internet facilitates such group work by allowing asynchronous as well as synchronous contributions to a common learning object independent of student’s working time and location. One way to foster CSCL is the employment of Wiki systems, e.g. for collaboratively working on a writing assignment. We developed an enhanced Wiki system with self- and peer assessment, visualizations, and functionalities for continuous teacher feedback. First evaluations of this ‘co-writing Wiki’ with computer science students showed its usefulness for collaborative course work. However, results from studies with tech-savvy participants, who are typically familiar with the benefits as well as drawbacks of such tools, are often limited regarding the generalizability to other populations. Thus, we introduced the Wiki in a non-technological environment and evaluated it with respect to usability, usefulness, and motivational components. Thirty psychology students used the co-writing Wiki to work collaboratively on a short paper. Besides providing an interface for generating and changing a document, the co-writing Wiki offers tools for formative assessment activities (integrated self-, peer-, and group assessment activities) as well as monitoring the progress of the group’s collaboration. The evaluation of the tool is based on log-data (activity tracking) as well as questionnaire data gathered at before and after working with the Wiki. Additionally, the instructor evaluated the co-writing Wiki concerning its usefulness for CSCL activities in academic settings. Despite technical problems and consequently low system usability scores, participants perceived the offered functionalities as helpful to keep a good overview on the current status of their paper and the contributions of their group members. The integrated self-assessment tool helped them to get aware of their strengths and weaknesses. In addition, students showed a high intrinsic motivation while working with the co-Writing Wiki, which did not change over the course of the study. From the instructor’s perspective, the co-writing Wiki allowed to effectively monitor the progress of the groups and enabled formative feedback by the instructor. Summarizing, the results indicate that using Wikis for CSCL is a promising way to also support students with no technological background.
2010

Granitzer Michael, Lanthaler Markus, Gütl Christian

Semantic Web services: state of the art

Proceedings of the IADIS international conference-Internet technologies and society 2010, IADIS Press, 2010

Konferenz
Service-oriented architectures (SOA) built on Web services were a first attempt to streamline and automate business processes in order to increase productivity but the utopian promise of uniform service interface standards, metadata, and universal service registries, in the form of the SOAP, WSDL and UDDI standards has proven elusive. Furthermore, the RPC-oriented model of those traditional Web services is not Web-friendly. Thus more and more prominent Web service providers opted to expose their services based on the REST architectural style. Nevertheless there are still problems on formal describing, finding, and orchestrating RESTful services. While there are already a number of different approaches none so far has managed to break out of its academic confines. This paper focuses on an extensive survey comparing the existing state-of-the-art technologies for semantically annotated Web services as a first step towards a proposal designed specifically for RESTful services.
2007

Sabol Vedran, Gütl Christian, Neidhart T., Juffinger A., Klieber Hans-Werner, Granitzer Michael

Visualization Metaphors for Multi-modal Meeting

Workshop Multimedia Semantics - The Role of Metadata (WMSRM 07), Proceedings Band "Aachener Informatik Berichte", Aachen, 2007

Konferenz
The MISTRAL system, a service oriented architecture for semanticextraction of multimedia data from meeting recordings is described shortly. Itimproves on other similar systems by extracting a variety of semantic metadatafrom one media type and integrating it with concepts derived from other mediatypes, as well as by adding inference capabilities to resolve ambiguities and furtherenrich extracted data. On top of this state-of-the-art extraction functionality anumber of semantic-based, cross-modal visual applications for exploration andretrieval of extraction results were developed. Three selected applications,implemented upon the MISTRAL’s semantic application architecture, arepresented and described into detail in this paper.
2001

Andrews K., Gütl Christian, Moser J., Sabol Vedran, Lackner W.

Search Result Visualisation with xFIND

Proc. of Second International Workshop on User Interfaces to Data Intensive Systems (UIDIS 2001),, Zuric, Switzerland, 2001

Konferenz
The xFIND gatherer-broker architecture provides a wealth of metadata, which can be used to provide sophisticated search functionality. Local or remote documents are indexed and summaries and metadata are stored on an xFIND broker (server). An xFIND client can search a particular broker and access rich metadata for search result presentation, without having to fetch the original documents themselves. Search result sets are not only presented as a traditional ranked list, but also in an interactive scatterplot (Search Result Explorer) and using dynamic thematic clustering (VisIslands)
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