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  • 1. Bonanni, L.
    et al.
    Ebner, Hannes
    School of Computer Science and Communication (CSC), Centres, KTH, School of Architecture and the Built Environment (ABE), Centres, Centre for Sustainable Communications, CESC. KTH, School of Computer Science and Communication (CSC), Media technology and interaction design, MID.
    Hockenberry, M.
    Sayan, B.
    Brandt, Nils
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology.
    Csikszentmihàlyi, N.
    Ishii, H.
    Turpeinen, Marko
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Young, S.
    Zapico Lamela, Jorge Luis
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology. School of Computer Science and Communication (CSC), Centres, KTH, School of Architecture and the Built Environment (ABE), Centres, Centre for Sustainable Communications, CESC.
    Sourcemap.org: First Application of Linked and Open LCA Data to Support Sustainability2011Conference paper (Refereed)
  • 2. Dietze, Stefan
    et al.
    Sanchez-Alonso, Salvador
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Yu, Hong Qing
    Giordano, Daniela
    Marenzi, Ivana
    Nunes, Bernardo Pereira
    Interlinking educational resources and the web of data A survey of challenges and approaches2013In: Program, ISSN 0033-0337, E-ISSN 1758-7301, Vol. 47, no 1, p. 60-91Article in journal (Refereed)
    Abstract [en]

    Purpose - Research in the area of technology-enhanced learning (TEL) throughout the last decade has largely focused on sharing and reusing educational resources and data. This effort has led to a fragmented landscape of competing metadata schemas, or interface mechanisms. More recently, semantic technologies were taken into account to improve interoperability. The linked data approach has emerged as the de facto standard for sharing data on the web. To this end, it is obvious that the application of linked data principles offers a large potential to solve interoperability issues in the field of TEL. This paper aims to address this issue. Design/methodology/approach - In this paper, approaches are surveyed that are aimed towards a vision of linked education, i.e. education which exploits educational web data. It particularly considers the exploitation of the wealth of already existing TEL data on the web by allowing its exposure as linked data and by taking into account automated enrichment and interlinking techniques to provide rich and well-interlinked data for the educational domain. Findings - So far web-scale integration of educational resources is not facilitated, mainly due to the lack of take-up of shared principles, datasets and schemas. However, linked data principles increasingly are recognized by the TEL community. The paper provides a structured assessment and classification of existing challenges and approaches, serving as potential guideline for researchers and practitioners in the field. Originality/value - Being one of the first comprehensive surveys on the topic of linked data for education, the paper has the potential to become a widely recognized reference publication in the area.

  • 3.
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID. School of Computer Science and Communication (CSC), Centres, KTH, School of Architecture and the Built Environment (ABE), Centres, Centre for Sustainable Communications, CESC.
    Supporting loose forms of collaboration: Using Linked Data to realize an architecture for collective knowledge construction2014Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis is driven by the motivation to explore a way of working collaboratively that closely reflects the World Wide Web (WWW), more specifically the potential of the Web architecture built on Semantic Web technologies and Linked Data. The goal is to describe a generic approach and architecture that satisfies the needs for loose collaboration and collective knowledge construction as exemplified by the applications described in this thesis. This thesis focuses on a contribution-centric architecture which allows for flexible applications that support loose forms of collaboration.

    The first research question deals with how Web-based collective knowledge construction can be supported. The second research question explores the characteristics of collective knowledge construction with respect to the Open World Assumption (OWA). The OWA implies that complete knowledge about a subject cannot be assumed at any time, which is one of the most fundamental properties of the WWW. The third research question investigates how Semantic Web technologies be used in order to support such a contribution-centric architecture.

    The thesis and its underlying publications are of a technical character and are always grounded in theoretical models and considerations that have led to functional implementations. The research has evolved in iterative development processes and was explicitly directed at building applications that can be used in collaborative settings and that are based on standardized Web technologies. One of the main outcomes, an information model, was developed together with such an application and provides a number of novel approaches in the context in which it was designed.

    The validity of the presented research is supported by evaluations from different perspectives: a list of implemented applications and showcases, results from structured interviews that have investigated the suitability for various resource annotation processes, as well as scalability aspects.

    The thesis concludes that it is ultimately up to the application how "loose" the collaboration should be and to which extent the OWA is incorporated. The presented architecture provides a toolkit to support the development of loosely collaborative applications. The showcased applications allow the construction of collaborative conceptual models and to collaboratively annotate educational resources. They show the potential of the used technology stack and the introduced contribution-centric architecture that sits on top if it.

  • 4.
    Ebner, Hannes
    et al.
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Manouselis, Nikos
    Palmér, Matthias
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Enoksson, Fredrik
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Palavitsinis, Nikos
    Kastrantas, Kostas
    Naeve, Ambjörn
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Learning Object Annotation for Agricultural Learning Repositories2009In: ICALT: 2009 IEEE INTERNATIONAL CONFERENCE ON ADVANCED LEARNING TECHNOLOGIES, New York, USA: IEEE , 2009, p. 438-442Conference paper (Refereed)
    Abstract [en]

    This paper introduces a Web-based tool that has been developed to facilitate learning object annotation in agricultural learning repositories with IEEE LOM-compliant metadata. More specifically, it presents how an application profile of the IEEE LOM standard has been developed for the description of learning objects on organic agriculture and agroecology. Then, it describes the design and prototype development of the Organic.Edunet repository tool: a Web-based for annotating learning objects on organic agriculture and agroecology, organizing them in using a portfolio-like user interface in a learning repository, and then federating this repository with a network of agricultural learning repositories.

  • 5.
    Ebner, Hannes
    et al.
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231). School of Computer Science and Communication (CSC), Centres, KTH, School of Architecture and the Built Environment (ABE), Centres, Centre for Sustainable Communications, CESC.
    Palmér, Matthias
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    A Mashup-friendly Resource and Metadata Management Framework2008In: Mash-Up Personal Learning Environments (MUPPLE'08): Workshop in Conjunction with the 3rd European Conference on Technology-Enhanced Learning (ECTEL'08): Times of Convergence / [ed] Wild, Kalz, Palmér, 2008, p. 48-56Conference paper (Refereed)
    Abstract [en]

    Mashups and mashed up Personal Learning Environments require easy to use frameworks to support the ease of creation of effective services.

    The focus of this paper1 lies on establishing a generic and mashup-friendly resource and metadata management. The assumption is that if we can find an appropriate level of generic functionality, the development of targeted tools (e.g. e-portfolios, PLEs, etc) will become a matter of user interface design and specialization. We hope that such a framework does not result in a single implementation but rather a wide variety of interoperable systems that leverage plenty of functionality. In this paper we look at already existing standards and initiatives and show why they are not sufficiently generic. We propose a framework and take recent developments into consideration. We also show an implementation and introduce a tangible use case.

     

  • 6.
    Ebner, Hannes
    et al.
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Palmér, Matthias
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    An information model for managing resources and their metadata2014In: Semantic Web, ISSN 1570-0844, E-ISSN 2210-4968, Vol. 5, no 3, p. 237-255Article in journal (Refereed)
    Abstract [en]

    Today information is managed within increasingly complicated Web applications which often rely on similar information models. Finding a reusable and sufficiently generic information model for managing resources and their metadata would greatly simplify development of Web applications. This article presents such an information model, namely the Resource and Metadata Management Model (ReM3). The information model builds upon Web architecture and standards, more specifically the Linked Data principles when managing resources together with their metadata. It allows to express relations between metadata and to keep track of provenance and access control. In addition to this information model, the architecture of the reference implementation is described along with a Web application that builds upon it. To show the taken approach in practice, several real-world examples are presented as showcases. The information model and its reference implementation have been evaluated from several perspectives, such as the suitability for resource annotation, a preliminary scalability analysis and the adoption in a number of projects. This evaluation in various complementary dimensions shows that ReM3 has been successfully applied in practice and can be considered a serious alternative when developing Web applications where resources are managed along with their metadata.

  • 7.
    Ebner, Hannes
    et al.
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Palmér, Matthias
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    LDCache - A cache for linked data-driven web applications2014In: CEUR Workshop Proceedings, 2014, p. 67-73Conference paper (Refereed)
    Abstract [en]

    Modern Web applications that make use of external data sources, be it Linked Data (LD) or not, usually run into the same problems; if a data source performs badly or is offline, the user experience is affected negatively. In some cases this may result in long response times, whereas in more extreme cases the application becomes unusable. This paper presents LDCache [4], a caching service that ensures that Linked Data-driven Web applications remain functional with good user experience regardless of the status of the external data sources they eventually integrate. First, some requirements are defined that typically occur when data from disparate sources are integrated. Then the features of the implemented solution are summarized together with documentation on how the service can be taken advantage of. This is followed by a description of the architecture. The authors conclude with a road map for future development and a short summary of the work carried out.

  • 8.
    Ebner, Hannes
    et al.
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media.
    Palmér, Matthias
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media.
    Naeve, Ambjörn
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media.
    Collaborative Construction of Artifacts2007Conference paper (Refereed)
    Abstract [en]

    This paper describes an approach for collaborative construction of artifacts, such as e.g. graphical maps and annotatable text documents, without requiring write-access to a common single file. Our approach is applicable to any kind of artifacts that can be divided into separate contributions, where each one is authored and stored independently, and, on request, merged into the artifact. The goal is to move collaboration issues from the files where artifacts are expressed, to an information directory. This information directory manages information around artifacts and keeps track of existing contributions to artifacts. Our prototype of such an information directory, named Collaborilla, is designed to be a flexible service, which can be updated by anyone in a wiki-style manner. With this approach, viewing a collaboratively constructed artifact gives each viewer the control of including or excluding various contributions. Moreover, each viewer can easily choose to participate and provide a new contribution to the artifact without the other authors being aware of this. If information about this new contribution is published in the Collaborilla directory, the contribution will also be seen by others.

  • 9. Grebner, Olaf
    et al.
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Collaborative Tasks using Metadata Conglomerates - The Social Part of the Semantic Desktop2008In: Proceedings of I-SEMANTICS ’08Graz, 2008Conference paper (Refereed)
    Abstract [en]

    This paper presents an application that enables loose and ad-hoc task collaboration for knowledge work and explicitly integrates task metadata into the collaboration process. With the increasing availability of semantic desktop technology, knowledge workers (KWers) can organize their personal information in a formalized way, including tasks. In an organization, KWers need to collaboratively access task-related information and to collaboratively work on it. In such a scenario, today’s available collaboration support applications, e.g. enterprise collaboration systems like wikis, either sacrifice end-user experience or semantic richness when dealing with structured knowledge. The presented collaborative task management (TM) application circumvents this trade-off by showing how the Kasimir TM client and the Collaborilla collaboration server interact closely. The TM client supports the KWer’s personal TM and incorporates collaborative tasks. It invokes the collaboration server which centrally manages the collaborative tasks. It implements elaborated methods for metadata sharing and collaborative editing of this shared metadata. We present the detailed proposal for an underlying architecture of the application, review related work and conclude this paper by pointing out future work.

  • 10. Klerxk, Joris
    et al.
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231). School of Computer Science and Communication (CSC), Centres, KTH, School of Architecture and the Built Environment (ABE), Centres, Centre for Sustainable Communications, CESC.
    Contextual Open Educational Resources for Future Recommender Scenarios2011In: dataTEL workshop – Data Sets for Technology Enhanced Learning, 2011Conference paper (Refereed)
  • 11. Manouselis, Nikos
    et al.
    Abian, Alberto
    Soto, Jesus
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Palmér, Matthias
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Naeve, Ambjörn
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    A Semantic Infrastructure to Support a Federation of Agricultural Learning Repositories2008In: Proceedings - The 8th IEEE International Conference on Advanced Learning Technologies, ICALT 2008 / [ed] Diaz, P; Ignacio, A; Mora, E, 2008, p. 117-119Conference paper (Refereed)
    Abstract [en]

    This paper discusses how Semantic Web technologies are being adopted, specialized, and put in practice in order to set up a technical infrastructure that will facilitate sharing and reusing of learning resources. The case study is a federation of learning repositories with learning resources on agricultural topics, which is being developed in the context of the Organic.Edunet European initiative.

  • 12. Manouselis, Nikos
    et al.
    Kastrantas, Kostas
    Abian, Alberto
    Sanchez, Salvador
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media.
    Palmér, Matthias
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media.
    Naeve, Ambjörn
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media.
    Architectural Design of a Federation of Agricultural Learning Repositories2008Conference paper (Refereed)
  • 13. Manouselis, Nikos
    et al.
    Kastrantas, Kostas
    Sanchez-Alonso, Salvador
    Caceres, Jesus
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Palmér, Matthias
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Naeve, Ambjörn
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231).
    Architecture of the Organic.Edunet Web Portal2009In: International Journal of Web Portals, ISSN 1938-0194, Vol. 1, no 1, p. 71-91Article in journal (Refereed)
    Abstract [en]

    The use of Semantic Web technologies in educational Web portals has been reported to facilitate users 'search, access, and retrieval of learning resources. To achieve this, a number of different architectural components and services need to be harmonically combined and implemented. This article presents how this issue is dealt with in the context of a large-scale case study. More specifically, it describes the architecture behind the Organic. Edunet Web portal that aims to provide access to a federation of repositories with learning resources on agricultural topics. The various components of the architecture are presented and the supporting technologies are explained. In addition, the article focuses on how Semantic Web technologies are being adopted, specialized, and put in practice in order to facilitate ontology-aided sharing and reusing of learning resources.

  • 14. Palavitsinis, Nikos
    et al.
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media.
    Manouselis, Nikos
    Sanchez-Alonso, Salvador
    Using E-Learning technologies and standards to make educational content available: The Organic.Edunet approach2011In: Journal of Information Technology in Agriculture, ISSN 1546-959X, Vol. 4, no 1Article in journal (Refereed)
  • 15. Palavitsinis, Nikos
    et al.
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media.
    Manouselis, Nikos
    Sanchez-Alonso, Salvador
    Naeve, Ambjörn
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media.
    Evaluating Metadata Application Profiles Based on Usage Data: The Case of a Metadata Application Profile for Agricultural Learning Resources2009In: Proceedings of the International Conference on Digital Libraries and the Semantic Web, 2009Conference paper (Refereed)
  • 16. Sicilia, Miguel-Angel
    et al.
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Graphic Arts, Media (closed 20111231). School of Computer Science and Communication (CSC), Centres, KTH, School of Architecture and the Built Environment (ABE), Centres, Centre for Sustainable Communications, CESC.
    Sanchez-Alonso, Salvador
    Alvarez, F.
    Abian, Alberto
    Garcia-Barriocanal, Elena
    Navigating learning resources through linked data: A preliminary report on the re-design of organic.edunet2011In: Linked Learning 2011 eLearning Approaches for the Linked Data Age: Proceedings of Linked Learning 2011: the 1st International Workshop on eLearning Approaches for the Linked Data Age, Rheinisch-Westfaelische Technische Hochschule Aachen , 2011, p. 1-8Conference paper (Refereed)
    Abstract [en]

    Learning objects repositories have grown and matured in the last years, being currently a cornerstone for open education. Several current systems are offering metadata openly through mainstream harvesting protocols or providing standardized query interfaces. Also, the use of standardized vocabularies or ontologies is becoming more common to provide a degree of semantic interoperability. However, learning object metadata is typically not linked across repositories, and it is not providing a way to navigate by using other sources of data available on the Web. The linked open data (LOD) approach provides the framework for the evolution of learning object repositories into a more flexible system of sharing learning resource metadata. This paper describes how linked data has been integrated in the design and redesign of the export mechanisms of Organic.Edunet, a federation of learning repositories in the domain of organic agriculture that uses an RDF store and several ontologies to browse and search resources. The paper focuses on how the existing search and semantic browsing mechanisms can benefit from the use of LOD across repositories.

  • 17.
    Zapico Lamela, Jorge Luis
    et al.
    School of Computer Science and Communication (CSC), Centres, KTH, School of Architecture and the Built Environment (ABE), Centres, Centre for Sustainable Communications, CESC. KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology. KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Pargman, Daniel
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Ebner, Hannes
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Eriksson, Elina
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Hacking sustainability: Broadening participation through Green Hackathons2013Conference paper (Refereed)
    Abstract [en]

    Green Hackathon is an international series of coding events withsustainability purpose. Developers, researchers, environmental practitioners,and anyone else who is interested, work for a limited amount of time to createinnovative software solutions for sustainability. These events have explicitlyaimed to invite a broad spectrum of expertise besides technical expertise. Thisarticle presents the experiences and tensions of including these end users at amostly technically oriented event, and discusses how end-user developmentcould be used to encourage more reflective practices and as well as broadeningthe participation and the interdisciplinary collaboration in these events – withhigher-quality as a prospective outcome.

1 - 17 of 17
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