Publikationen

Hier finden Sie von Know-Center MitarbeiterInnen verfasste wissenschaftliche Publikationen

2008

Ghidini C., Rospocher M., Serafini L., Faatz A., Kump Barbara, Ley Tobias, Pammer-Schindler Viktoria, Lindstaedt Stefanie

Collaborative enterprise integrated modelling

Poster Session at the 16th International Conference on Knowledge Engineering and Knowledge Management Knowledge Patterns (EKAW 2008), 29th September-3rd October 2008 - Acitrezza, Catania, Italy, 2008

Konferenz
Enterprise modelling focuses on the construction of structured descriptions,the enterprise models, of sets of aspects relevant to the activity ofan enterprise. Nowadays, knowledge engineering provides powerful methodologiesand tools to support enterprise modeling in the production of formal models.These methods however present two main limitation: First, they are based ona waterfall process of transformation of informal knowledge into formal statements;Second, they tend to separate the modelling of the different aspects withoutproviding enough support to their final integration. In this paper we propose amore flexible framework that supports an agile collaboration between the actorsinvolved in the modelling activities, without sticking to a pre-defined protocolof interaction. In addition we propose an integrated meta-model that specifiesthe integration of single components of an articulated enterprise model as wellas their relations, and we report our experience of using the framework and themeta-model in the production of five enterprise models within the APOSDLEEU-project.
2008

Granitzer Gisela, Höfler Patrick

Learning With Social Semantic Technologies - Exploiting Latest Tools

Proceedings of Interactive Computer Aided Learning ICL 2008, September 24-26, 2008, 2008

Konferenz
2008

Kump Barbara, Kienreich Wolfgang, Granitzer Gisela, Granitzer Michael, Seifert C.

On the beauty and usability of tag clouds

Proceedings of the 12 International Conference on Information Visualization (IV2008), London, UK, July 9-11, 2008, IEEE Computer Society Press, 2008

Konferenz
2008

Jones S., Lynch P., Maiden N., Lindstaedt Stefanie

Use and Influence of Creative Ideas and Requirements for a Work-Integrated Learning System

proceedings of the RE08, 16th International Requirements Engineering Conference, Barcelona, Catalunya, Spain, September 8-12, IEEE Computer Society Press, 2008

Konferenz
In this paper, we describe a creativity workshop thatwas used in a large research project, called APOSDLE,to generate creative ideas and requirements for a workintegratedlearning system. We present an analysis ofempirical data collected during and after the workshop.On the basis of this analysis, we conclude that the workshopwas an efficient way of generating ideas for futuresystem development. These ideas, on average, were usedat least as much as requirements from other sources inwriting use cases, and 18 months after the workshop wereseen to have a similar degree of influence on the projectto other requirements. We make some observations aboutthe use of more and less creative ideas, and about thetechniques used to generate them. We end with suggestionsfor further work.
2008

Sabol Vedran, Scharl A.

Visualizing Temporal-Semantic Relations in Dynamic Information Landscapes

GeoVisualization of Dynamics, Movement and Change Workshop at the AGILE 2008 Conference, Spain, 2008

Konferenz
2008

The long way towards Workplace-integrated Learning

8th IEEE International Conference on Advanced Learning Technologies, Santander, Cantabria, Spain, 1-5 July 2008, 2008

Konferenz
2008

Stocker A., Höfler Patrick, Granitzer Gisela, Willfort R., Köck Anna Maria, Pammer-Schindler Viktoria

Towards a Framework for Social Web Platforms: The Neurovation Case

Proceedings of the Third International Conference on Internet and Web Applications and Services (ICIW 2008), IEEE Computer Society Press, 2008

Konferenz
Social web platforms have become very popular in the so-called Web 2.0, and there is no end in sight. However, very few systematic models for the constitution of such sociotechnical infrastructures exist in the scientific literature. We therefore present a generic framework for building social web platforms based on the creation of value for individuals, communities and social networks. We applied this framework in the Neurovation project, aiming to establish a platform for creative knowledge workers. This paper describes work in progress and the lessons we have learned so far.
2008

Stocker A., Us Saeed A., Höfler Patrick, Strohmaier M.

Stakeholder-Orientierung als Gestaltungsprinzip für Corporate Web 2.0: Eine explorative Analyse

Hrsg.: Martin Bichler, Thomas Hess, Helmut Krcmar, Ulrike Lechner, Florian Matthes, Arnold Picot, Benjamin Speitkamp, Petra Wolf. , 2008

Konferenz
2008

Granitzer Gisela, Pillmann W., Geiger W.

ICT-ENSURE: A 7th Framework Program Support Action for Building the European Research Area in the Field of ICT for Environmental Sustainability

Proceedings of EnviroInfo 2008, Lüneburg, Deutschland, 2008

Konferenz
2008

Strohmaier M., Horkoff Jennifer, Yu E., Aranda Jorge, Easterbrook Steve

Can Patterns improve Modeling? Two Exploratory Studies

International Working Conference on Requirements Engineering: Foundations for Software Quality (REFSQ'08), co-located with CAISE'08, Montpellier, France, 2008, 2008

Konferenz
A considerable amount of effort has been placed into the investigation of i* modeling as a tool for early stage requirements engineering. However, widespread adoption of i* models in the requirements process has been hindered by issues such as the effort required to create the models, coverage of the problem context, and model complexity. In this work, we explore the feasibility of pattern application to address these issues. To this end, we perform both an exploratory case study and initial experiment to investigate whether the application of patterns improves aspects of i* modeling. Furthermore, we develop a methodology which guides the adoption of patterns for i* modeling. Our findings suggest that applying model patterns can increase model coverage, but increases complexity, and may increase modeling effort depending on the experience of the modeler. Our conclusions indicate situations where pattern application to i* models may be beneficial.
2008

Lindstaedt Stefanie , , , Lokaiczyk R., Kump Barbara, Beham Günter, Pammer-Schindler Viktoria

Knowledge Services for Work-integrated Learning

Proceedings of the European Conference on Technology Enhanced Learning (ECTEL) 2008, Maastricht, The Netherlands, September 16-19, Springer, 2008

Konferenz
In order to support work-integrated learning scenarios task- andcompetency-aware knowledge services are needed. In this paper we introducethree key knowledge services of the APOSDLE system and illustrate how theyinteract. The context determination daemon observes user interactions andinfers the current work task of the user. The user profile service uses theidentified work tasks to determine the competences of the user. And finally, theassociative retrieval service utilizes both the current work task and the inferredcompetences to identify relevant (learning) content. All of these knowledgeservices improve through user feedback.
2008

Us Saeed A., Afzal M. T., Latif A., Stocker A.

Does Tagging Indicate Knowledge Diffusion? An Exploratory Case Study

Proceedings of the ICCIT 08 - International Conference on Convergence and hybrid Information Technology, Busan, Korea, 2008, 2008

Konferenz
2008

Stocker A.

Investigating Weblogs in Small and Medium Enterprises: An Exploratory Case Study

Proceedings of 11th International Conference on Business Information Systems – BIS ‘08 (2nd Workshop on Social Aspects of the Web), Innsbruck, May 5-7, 2008, 2008

Konferenz
2008

Granitzer Gisela, Höfler Patrick

Interne Soziale Netzwerke: Was bringen sie dem Unternehmen?

Computerzeitung, 2008

Konferenz
2008

Granitzer Gisela, Granitzer Michael

Die clevere Art der Suche

e-commerce magazin, Ausgabe 7, 2008, 2008

Konferenz
2008

Dickinger A., Scharl A., Stern Hermann, Weichselbraun A., Wöber K.

Acquisition and Relevance of Geotagged Information in Tourism

Information and Communication Technologies in Tourism 2008, Proceedings of the International Conference in Innsbruck, Austria., Frew, A., Springer, 2008

Konferenz
In the case of tourism applications, it is particularly evident that geography is emerging as a fundamental principle for structuring Web resources. Recent improvements in semantic and geographic Web technology, often referred to as the Geospatial Web, acknowledge the relevance of adding location metadata to existing databases and accessing the vast amounts of information stored in these databases via geospatial services. This paper outlines the acquisition of geospatial context information, describes usage scenarios and real-world applications in the tourism industry, and presents an automated software tool for annotating large collections of Web documents automatically. The quality of this tool is tested based upon Web pages from the Austrian National Tourism Organization. Initial results are encouraging and help define a roadmap for further improving the automated tagging of tourism resources.
2008

Scharl A., Stern Hermann, Weichselbraun A.

Annotating and Visualizing Location Data in Geospatial Web Applications

17th International World Wide Web Conference (WWW-2008), Proceedings of the First International Workshop on Location and the Web (LocWeb 2008), 2008

Konferenz
This paper presents the IDIOM Media Watch on Climate Change (www.ecoresearch.net/climate), a prototypical implementation of an environmental portal that emphasizes the importance of location data for advanced Web applications. The introductory section outlines the process of retrofitting existing knowledge repositories with geographical context information, a process also referred to as geotagging. The paper then describes the portal’s functionality, which aggregates, annotates and visualizes environmental articles from 150 Anglo-American news media sites. From 300,000 news media articles gathered in weekly intervals, the system selects about 10,000 focusing on environmental issues. The crawled data is indexed and stored in a central repository. Geographic location represents a central aspect of the application, but not the only dimension used to organize and filter content. Applying the concepts of location and topography to semantic similarity, the paper concludes with discussing information landscapes as alternative interface metaphor for accessing large Web repositories.
2008

Strohmaier M.

Purpose Tagging - Capturing User Intent to Assist Goal-Oriented Social Search

SSM'08 Workshop on Search in Social Media, 2008

Konferenz
2008

Strohmaier M., Prettenhofer P., Kröll Mark

Different Degrees of Explicitness in Intentional Artifacts - Studying User Goals in a Large Search Query Log

International Workshop on Agents and Data Mining Interaction ADMI'08, 2008

Konferenz
2008

Costa C., Beham Günter, Reinhardt R., Sillaots M.

Microblogging In Technology Enhanced Learning Conferences: A Use Case Inspection

Workshop at the European Conference on Technology Enhanced Learning (ECTEL) 2008, Maastricht, The Netherlands, September 16-19, 2008

Konferenz
2008

Pammer-Schindler Viktoria

How class axioms affect instance data

Doctoral Consortium of the 11th International Conference on Principles of Knolwedge Representation and Reasoning (KR 2008), 2008

Konferenz
2008

Ley Tobias, Kump Barbara, Ulbrich Armin, Scheir Peter, Lindstaedt Stefanie

A Competence-based Approach for Formalizing Learning Goals in Work-integrated Learning

Proceedings of the ED-Media 2008, Vienna, Austria, June 30-July 4, 2008,, Chesapeake, VA: AACE, 2008

Konferenz
The paper suggests a way to support work-integrated learning for knowledge workwhich poses a great challenge for current research and practice. We first present a WorkplaceLearning Context Model which has been derived by analyzing knowledge work and the knowledgesources used by knowledge workers. The model specifies an integrative view on knowledgeworkers’ work environment by connecting learning, work and knowledge spaces. We then focuson the part of the context which specifies learning goals and their interrelations to task and domainmodels. Our purpose is to support learning needs analysis which is based on a comparison of tasksperformed in the past to those tasks to be tackled in the future. A first implementation in theAPOSDLE project is presented including the models generated for five real world applications andthe software prototype. We close with an outlook on future work.
2008

Kienreich Wolfgang, Kraker Peter

Comparative Evaluation of Two Systems for the Visual Navigation of Encyclopedia Knowledge Spaces

DS08 - Eleventh International Conference on Discovery Science, Springer, 2008

Konferenz
2008

Lindstaedt Stefanie , Jones S.

A Multi-Activity Distributed Participatory Design Process for Stimulating Creativity in the Specification of requirements for a Work-Integrated Learning System

Workshop on Distributed Participatory Designat the 26th Computer Human Interaction Conference (CHI2008), Florence, Italy, 2008

Konferenz
We describe the approach to distributed participatorydesign taken within the APOSDLE project. The processincluded instances of both synchronous andasynchronous, distributed and non-distributed designactivities, and also integrated activities designed tostimulate creative inputs to requirements. We reportkey lessons learned.
2008

Aehnelt M., Ebert M., Beham Günter, Lindstaedt Stefanie , Paschen A.

A Socio-Technical Approach towards Supporting Intra-Organizational Collaboration

Proceedings of the European Conference on Technology Enhanced Learning (ECTEL) 2008, Maastricht, The Netherlands, September 16-19, Springer, 2008

Konferenz
Knowledge work in companies is increasingly carried out by teams of knowledge workers. They interact within and between teams with the common goal to acquire, apply, create and share knowledge. In this paper we propose a socio-technical model to support intra-organizational collaboration which specifically takes into account the social and collaborative nature of knowledge work. Our aim is to support in particular the efficiency of collaborative knowledge work processes through an automated recommendation of collaboration partners and collaboration media. We report on the theoretical as well as practical aspects of such a socio-technical model.
2008

Kump Barbara

A Validation Framework for Formal Models in Adaptive Technology-Enhanced Work-Integrated Learning

Adaptive Hypermedia and Adaptive Web-Based Systems, 5th International Conference, AH 2008, Hannover, Germany, July 29 - August 1, 2008, Nejdl, W., Kay, J., Pu, P., Herder, E., Springer, 2008

Konferenz
2008

Granitzer Michael, Kröll Mark, Seifer Christin, Rath Andreas S., Weber Nicolas, Dietzel O., Lindstaedt Stefanie

Analysis of Machine Learning Techniques for Context Extraction

Proceedings of 2008 International Conference on Digital Information Management (ICDIM08), IEEE Computer Society Press, 2008

Konferenz
’Context is key’ conveys the importance of capturing thedigital environment of a knowledge worker. Knowing theuser’s context offers various possibilities for support, likefor example enhancing information delivery or providingwork guidance. Hence, user interactions have to be aggregatedand mapped to predefined task categories. Withoutmachine learning tools, such an assignment has to be donemanually. The identification of suitable machine learningalgorithms is necessary in order to ensure accurate andtimely classification of the user’s context without inducingadditional workload.This paper provides a methodology for recording user interactionsand an analysis of supervised classification models,feature types and feature selection for automatically detectingthe current task and context of a user. Our analysisis based on a real world data set and shows the applicabilityof machine learning techniques.
2008

Kienreich Wolfgang, Lex Elisabeth, Seifert C.

APA Labs: An Experimental Web-Based Platform for the Retrieval and Analysis of News Articles

Proceedings of the first International Conference on the Applications and Digital Information and Web Technologies (ICADIWT08), 2008

Konferenz
2008

Moerzinger R., Sorschag R., Thallinger G., Lindstaedt Stefanie

Automatic Image Annotation using Visual Content and Folksonomies

Proceedings of the Metadata Mining for Image Understanding Workshop at VISAPP2008 in Funchal, Portugal, 22-25 January 2008, 2008

Konferenz
Automatic image annotation is an important and challengingtask when managing large image collections. This paper describestechniques for automatic image annotation by taking advantage of collaborativelyannotated image databases, so called visual folksonomies.Our approach applies two techniques based on image analysis: Classificationannotates images with a controlled vocabulary while tag propagationuses user generated, folksonomic annotations and is thereforecapable of dealing with an unlimited vocabulary. Experiments with apool of Flickr images demonstrate the high accuracy and efficiency ofthe proposed methods in the task of automatic image annotation.
2008

Ghidini C., Rospocher M., Serafini L., Kump Barbara, Pammer-Schindler Viktoria, Faatz A., Zinnen A., Guss J., Lindstaedt Stefanie

Collaborative Knowledge Engineering via Semantic MediaWiki

Proceedings of the I-Semantics 2008, Graz, Austria, Sep. 3-5 2008, 2008

Konferenz
Formal modelling is a challenging and expensive task, especially for people not familiarwith design techniques and formal languages. In this paper we present the modelling experiencewithin the APOSDLE EU-project, and we describe the methodology we have developedto support an integrated modelling process of the ontologies and workflows inside APOSDLE.Our approach is based on two main pillars: (i) the usage of Semantic MediaWiki (SMW) forthe collaborative development of informal models to be created, and (ii) a tight, and as much aspossible automatic, integration of the SMW with tools for formal modelling, in order to reuse theinformal models for formal models creation.
2008

Schmidt A., Hinkelmann K., Lindstaedt Stefanie , Ley Tobias, Maier R., Riss U.

Conceptual Foundations for a Service-Oriented Knowledge and Learning Architecture: Supporting Content, Process, and Ontology Maturing

Proceedings of I-Know 08 and I-Media 08, Graz, Austria, September 3-5, 2008, 2008

Konferenz
2008

Juffinger A., Kern Roman, Granitzer Michael

Exploiting Cooccurrence on Corpus and Document Level for Fair Crosslanguage Retrieval

Working Notes for the CLEF 2008 Workshop, 17-19 September, Aarhus, Denmark, 2008

Konferenz
2008

Granitzer Michael, Seifert C., Zechner Mario

Context Resolution Strategies for Automatic Wikipedia Linking

INEX 2008 pre-proceedings, Dagstuhl, Germany, Geva, S., Kamps, J., Trotman, A., Shlomo Geva and Jaap Kamps and Andrew Trotman (Eds.), 2008

Konferenz
2008

Rath Andreas S., Weber Nicolas, Kröll Mark, Granitzer Michael, Dietzel O., Lindstaedt Stefanie

Context-Aware Knowledge Services

Workshop on Personal Information Management (PIM2008) at the 26th Computer Human Interaction Conference (CHI2008), Florence, Italy, 2008

Konferenz
Improving the productivity of knowledge workers is anopen research challenge. Our approach is based onproviding a large variety of knowledge services which takethe current work task and information need (work context)of the knowledge worker into account. In the following wepresent the DYONIPOS application which strives toautomatically identify a user’s work task and thencontextualizes different types of knowledge servicesaccordingly. These knowledge services then provideinformation (documents, people, locations) both from theuser’s personal as well as from the organizationalenvironment. The utility and functionality is illustratedalong a real world application scenario at the Ministry ofFinance in Austria.
2008

Juffinger A., Kern Roman, Granitzer Michael

Crosslanguage Retrieval based on Wikipedia Statistics

Proc. of 8th Workshop of the Cross-Language Evaluation Forum, CLEF 2008, 17-19 September, Aarhus, Denmark, 2008

Konferenz
2008

Zinnen A., Hambach S., Faatz A., Lindstaedt Stefanie , Beham Günter, Godehardt E., Goertz M., Lokaiczyk R.

Datenschutzfragen bei der Etablierung einer Arbeitsprozess-integrierten e-Learning-Lösung

Gesellschaft für Informatik (GI): DeLFI 2008 : Die 6. e-Learning Fachtagung Informatik der Gesellschaft für Informatik e.V.Bonn : Köllen, 2008, Seehusen, S., Gesellschaft für Informatink eV, 2008

Konferenz
2008

Christl C., Ghidini C. , Guss J., Lindstaedt Stefanie , Pammer-Schindler Viktoria, Scheir Peter, Serafini L.

Deploying semantic web technologies for work integrated learning in industry. A comparison: SME vs. large sized company

Proceedings of the ISWC 2008, 7th International Semantic Web Conference, Karlsruhe, Germany, Oct 26-30, 2008 , Springer, 2008

Konferenz
Modern businesses operate in a rapidly changing environment.Continuous learning is an essential ingredient in order to stay competitivein such environments. The APOSDLE system utilizes semanticweb technologies to create a generic system for supporting knowledgeworkers in different domains to learnwork. Since APOSDLE relies onthree interconnected semantic models to achieve this goal, the questionon how to efficiently create high-quality semantic models has become oneof the major research challenges. On the basis of two concrete examplesnamelydeployment of such a learning system at EADS, a large corporation,and deployment at ISN, a network of SMEs-we report in detail theissues a company has to face, when it wants to deploy a modern learningenvironment relying on semantic web technology.
2008

Strohmaier M., Prettenhofer P., Lux M.

Different Degrees of Explicitness in Intentional Artifacts - Studying User Goals in a Large Search Query Log

proceedings of CSKGOI 08 International Workshop on Commonsense Knowledge and Goal Oriented Interfaces, 2008

Konferenz
On the web, search engines represent a primary instrument through which users exercise their intent. Understanding the specific goals users express in search queries could improve our theoretical knowledge about strategies for search goal formulation and search behavior, and could equip search engine providers with better descriptions of users’ information needs. However, the degree to which goals are explicitly expressed in search queries can be suspected to exhibit considerable variety, which poses a series of challenges for researchers and search engine providers. This paper introduces a novel perspective on analyzing user goals in search query logs by proposing to study different degrees of intentional explicitness. To explore the implications of this perspective, we studied two different degrees of explicitness of user goals in the AOL search query log containing more than 20 million queries. Our results suggest that different degrees of intentional explicitness represent an orthogonal dimension to existing search query categories and that understanding these different degrees is essential for effective search. The overall contribution of this paper is the elaboration of a set of theoretical arguments and empirical evidence that makes a strong case for further studies of different degrees of intentional explicitness in search query logs.
2008

Weichselbraun A., Wohlgenannt G., Scharl A., Granitzer Michael, Neidhart T., Juffinger A.

Discovery and evaluation of non-taxonomic relations in domain ontologies

International Journal of Metadata, Semantics and Ontologies, 2008

Konferenz
The identification and labelling of non-hierarchical relations are among the most challenging tasks in ontology learning. This paper describes a bottom-up approach for automatically suggesting ontology link types. The presented method extracts verb vectors from semantic relations identified in the domain corpus, aggregates them by computing centroids for known relation types and stores the centroids in a central Knowledge Base (KB). Comparing verb vectors extracted from unknown relations with the stored centroids yields link-type suggestions. Domain experts evaluate these suggestions, refining the KB and constantly improving the components accuracy. Using four sample ontologies on ’energy sources’, this paper demonstrates how link-type suggestion aids the ontology design process. It also provides a statistical analysis on the accuracy and average ranking performance of Batch Learning (BL) vs. Online Learning (OL).
2008

Granitzer Michael, Zechner Mario, Kolbitsch J., Kemper P., In't Velt R.

Evaluation of Automatic Linking Strategies for Wikipedia Pages

Proceedings of the IADIS WWW/Internet Conference 2008, IADIS, 2008

Konferenz
2008

Lindstaedt Stefanie , Pammer-Schindler Viktoria, Mörzinger Roland, Kern Roman, Mülner Helmut, Wagner Claudia

Recommending tags for pictures based on text, visual content and user context

Third International Conference on Internet and Web Applications and Services (ICIW), IEEE, 2008

Konferenz
Imagine you are member of an online social systemand want to upload a picture into the community pool. In currentsocial software systems, you can probably tag your photo, shareit or send it to a photo printing service and multiple other stuff.The system creates around you a space full of pictures, otherinteresting content (descriptions, comments) and full of users aswell. The one thing current systems do not do, is understandwhat your pictures are about.We present here a collection of functionalities that make a stepin that direction when put together to be consumed by a tagrecommendation system for pictures. We use the data richnessinherent in social online environments for recommending tags byanalysing different aspects of the same data (text, visual contentand user context). We also give an assessment of the quality ofthus recommended tags.
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