[article] Perustieteiden korkeakoulu / SCI

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Browsing [article] Perustieteiden korkeakoulu / SCI by Department "Department of Computer Science and Engineering"

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  • Computational method for supporting learning with cumulative vocabularies, conceptual networks and Wikipedia linkage
    (2014) Lahti, Lauri
     School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
    In this research paper we propose a new educational framework based on guided exploration in scale-free small-world networks relying on hyperlink network of the Wikipedia online encyclopedia in which hyperlinks between articles define conceptual relationships. Educational material is presented to student with cumulative conceptual networks based on hyperlink network of the Wikipedia connecting concepts of vocabulary about current learning topic. Personalization of educational material is carried out by alternating the distribution of enabled hyperlinks connecting concepts belonging to current vocabulary according to requirements of learning objective, learning context and learner’s knowledge. Besides developing a computational method to manage educational material with conceptual networks and to explore the shortest paths between concepts of vocabulary (especially highest-ranking hyperlinked concepts and strongly rising hyperlinked concepts), we have also experimentally estimated properties of conceptual networks generated based on hyperlink network of the Wikipedia between concepts retrieved from English Vocabulary Profile for cumulatively vocabularies of six language ability levels and from Oxford Wordlist for partially cumulative vocabularies of five school levels.
  • Understanding the Usage and Requirements of the Photo Tagging System
    (2014) Malik, Aqdas; Marko, Nieminen
     School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
    The amount of personal photos is massively increasing and managing them effectively and efficiently requires new approaches and practices. This study analyses the users’ needs and their behaviour towards photo tagging in the context of a personal photo repository. Our results are from a qualitative study with 15 users. Study methods include a questionnaire and a task analy-sis approach in which we analyse and evaluate practices around semi-automated photo tagging. In the task analysis, we describe and use a photo tagging application called SmartImages for studying the actual tagging expe-rience. The results from the study indicate that photo tagging in personal collections is rarely used as it is considered too laborious. The task analysis with SmartImages made users consider tagging worthwhile and beneficial. The results propose changes to the implementation of tagging functionality in photo management applications. We conclude that better visibility of the tagging feature and introducing social elements would improve the usage and benefit of tagging. Providing automated tag suggestions that are comprehen-sible, conceptually relevant and the relation between the displayed tags and the photo is clear would make users more willing to engage with tagging ac-tivities. Addressing the mentioned issues would help the users in managing the increasing number of personal photos.