Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 28. April 2022)
1Gaona-García, P.A. ; Stoitsis, G. ; Sánchez-Alonso, S. ; Biniari, K.: ¬An exploratory study of user perception in visual search interfaces based on SKOS.
In: Knowledge organization. 43(2016) no.4, S.217-238.
Abstract: Repositories are web portals that provide access to learning objects. Resources can be easily located through the use of metadata, an important factor to increase the ease of searching for digital resources in repositories. However, there are as yet no similarly effective methods in order to increase access to learning objects. The main goal of this paper is to offer an alternative search system to improve access to academic learning objects and publications for several repositories through the use of information visualisation and Simple Knowledge Organization Schemes (SKOS). To this end, we have developed a visual framework and have used the Organic.Edunet and AGRIS as case studies in order to access academic and scientific publication resources respectively. In this paper, we present the results of our work through a test aimed at evaluating the whole visual framework, and offer recommendations on how to integrate this type of visual search into academic repositories based on SKOS.
Themenfeld: Semantische Interoperabilität
Objekt: SKOS ; AGRIS
2Martín-Moncunill, D. ; García-Barriocanal, E. ; Sicilia, M.-A. ; Sánchez-Alonso, S.: Evaluating the practical applicability of thesaurus-based keyphrase extraction in the agricultural domain : insights from the VOA3R project.
In: Knowledge organization. 42(2015) no.2, S.76-89.
Abstract: The use of Knowledge Organization Systems (KOSs) in aggregated metadata collections facilitates the implementation of search mechanisms operating on the same term or keyphrase space, thus preparing the ground for improved browsing, more accurate retrieval and better user profiling. Automatic thesaurus-based keyphrase extraction appears to be an inexpensive tool to obtain this information, but the studies on its effectiveness are scattered and do not consider the practical applicability of these techniques compared to the quality obtained by involving human experts. This paper presents an evaluation of keyphrase extraction using the KEA software and the AGROVOC vocabulary on a sample of a large collection of metadata in the field of agriculture from the AGRIS database. This effort includes a double evaluation, the classical automatic evaluation based on precision and recall measures, plus a blind evaluation aimed to contrast the quality of the keyphrases extracted against expert-provided samples and against the keyphrases originally recorded in the metadata. Results show not only that KEA outperforms humans in matching the original keyphrases, but also that the quality of the keyphrases extracted was similar to those provided by humans.
Inhalt: Vgl.: http://www.ergon-verlag.de/isko_ko/downloads/ko_42_2015_2_b.pdf.
Themenfeld: Konzeption und Anwendung des Prinzips Thesaurus
3Palavitsinis, N. ; Manouselis, N. ; Sanchez-Alonso, S.: Metadata quality in digital repositories : empirical results from the cross-domain transfer of a quality assurance process.
In: Journal of the Association for Information Science and Technology. 65(2014) no.6, S.1202-1216.
Abstract: Metadata quality presents a challenge faced by many digital repositories. There is a variety of proposed quality assurance frameworks applied in repositories that are deployed in various contexts. Although studies report that there is an improvement of the quality of the metadata in many of the applications, the transfer of a successful approach from one application context to another has not been studied to a satisfactory extent. This article presents the empirical results of the application of a metadata quality assurance process that has been developed and successfully applied in an educational context (learning repositories) to 2 different application contexts to compare results with the previous application and assess its generalizability. More specifically, it reports results from the adaptation and application of this process in a library context (institutional repositories) and in a cultural context (digital cultural repositories). Initial empirical findings indicate that content providers seem to be gaining a better understanding of metadata when the proposed process is put in place and that the quality of the produced metadata records increases.
4Rajabi, E. ; Sanchez-Alonso, S. ; Sicilia, M.-A.: Analyzing broken links on the web of data : An experiment with DBpedia.
In: Journal of the Association for Information Science and Technology. 65(2014) no.8, S.1721-1727.
Abstract: Linked open data allow interlinking and integrating any kind of data on the web. Links between various data sources play a key role insofar as they allow software applications (e.g., browsers, search engines) to operate over the aggregated data space as if it was a unique local database. In this new data space, where DBpedia, a data set including structured information from Wikipedia, seems to be the central hub, we analyzed and highlighted outgoing links from this hub in an effort to discover broken links. The paper reports on an experiment to examine the causes of broken links and proposes some treatments for solving this problem.
Themenfeld: Semantic Web
5Rajabi, E. ; Sicilia, M.-A. ; Sanchez-Alonso, S.: Research objects interlinking : the case of Dryad repository.
In: Metadata and semantics research: 8th Research Conference, MTSR 2014, Karlsruhe, Germany, November 27-29, 2014, Proceedings. Eds.: S. Closs et al. Cham : Springer, 2014. S.14-21.
(Communications in computer and information science; 478)
Abstract: Interlinking research objects using the RDF links facilitates sharing and data discovery on the Web of Data. This works toward enriching the research repositories by linking their research artifacts to various scientific or even general data on the Web. In this paper, we experiment on an interlinking approach over Dryad, a research object repository, to a digital library dataset in the Linked Open Data cloud. We fetch data from both targets in different steps, run an interlinking tool and report as well as analyze the results. The generated outputs and assessed matched links show that interlinking a research dataset like Dryad to Web of Data brings an added value to the repository, as it connects its research artefacts to scientific objects of other datasets.
6Garcia-Barriocanal, E. ; Sicilia, M.A. ; Sanchez-Alonso, S.: Usability evaluation of ontology editors.
In: Knowledge organization. 32(2005) no.1, S.1-9.
Abstract: Ontology editors are software tools that allow the creation and maintenance of ontologies through a graphical user interface. As the semantic web effort grows, a larger community of users for this kind of tool is expected. New users include people not specifically skilled in the use of ontology formalisms. In consequence, the usability of ontology editors can be viewed as a key adoption precondition for semantic web technologies. In this paper, the usability evaluation of several representative ontology editors is described. This evaluation is carried out by combining a heuristic pre-assessment with a subsequent usertesting phase. The target population is comprised of people with no specific ontology-creation skills that have a general knowledge about domain modelling. For this kind of user, current editors are adequate for the creation and maintenance of simple ontologies. Also, there is room for improvement, especially in browsing mechanisms, help systems, and visualization metaphors.
Objekt: Protégé 2000 1.6.2 ; OntoEdit 2.0 ; OILEd 2.2a ; KSL Ontology Editor ; WebOde 1.1 ; WebOnto ; KADS22