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Abstract

Research Data repositories are growing in terms of volume rapidly and exponentially. Their main goal is to provide scientists the essential mechanism to store, share, and re-use datasets generated at various stages of the research process. Despite the fact that metadata play an important role for research data management in the context of these repositories, several factors - such as the big volume of data and its complex lifecycles, as well as operational constraints related to financial resources and human factors - may impede the effectiveness of several metadata elements. The aim of the research reported in this paper was to perform a descriptive analysis of the DC.Subject metadata element and to identify its data quality problems in the context of the Dryad research data repository. In order to address this aim a total of 4.557 packages and 13.638 data files were analysed following a data-preprocessing method. The findings showed emerging trends about the subject coverage of the repository (e.g. the most popular subjects and the authors that contributed the most for these subjects). Also, quality problems related to the lack of controlled vocabulary and standardisation were very common. This study has implications for the evaluation of metadata and the improvement of the quality of the research data annotation process.

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Abstract

The authors report on the findings of a usability test conducted to evaluate the usability of the VeriaGrid online system. The VeriaGrid (www.theveriagrid.org) is a prototype virtual map that focuses on the provision of information related to the cultural heritage of the city of Veria (Greece). It has been developed under the Light Project by the Central Public Library of Veria (www.libver.gr). It is an interactive application that includes various functional or thematic areas such as an interactive digital map of Veria, image gallery, videoclips, panoramic site photos, and general information about the city of Veria. The findings of the usability test revealed that users had some difficulties in using novel features of the digital map (such as the Recommended Points and the Routes functions) and finding textual information about cultural heritage of the city of Veria. Users, however, were satisfied with the overall usability of the system. In light of these findings, some recommendations for improving the usability of the system are made.