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Downscaling information systems for education

Downscaling information systems for education



Invited talk given during a meeting of the LinkedUp project, in Amsterdam on February 19.

Invited talk given during a meeting of the LinkedUp project, in Amsterdam on February 19.



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    Downscaling information systems for education Downscaling information systems for education Presentation Transcript

    • Data Archiving and Networked Services Downscaling information systems for education Christophe Guéret (@cgueret)DANS is een instituut van KNAW en NWO
    • What do you mean "Downscaling" ?● Alternative to up/out scaling platforms when the cost of doing it becomes too high● "Cost" in the wide sense ○ Loss of expressivity via harmonization ○ Loss of privacy ○ Loss of consistency / incompatible semantics ○ Hardware costs ○ Infrastructural costs ○ Cultural incompatibility ○ ...
    • Up / out scaling● Get more and more data into one system● Scale vertically (up) or horizontally (out)
    • Down scaling● Instead of one big (cluster) system, use a swarm of smaller systems● Aim at highest meaningful granularity
    • 2 downscaled systems for education● Information system for researchers willing to study Worldwide academic activity● ~2M young learners willing to go social with digital media, but without Internet
    • Diversity aware publication ofactivity of research institutions
    • Context● Millions of researchers active Worldwide● Represents lot of information about ○ Positions ○ Teaching activities ○ Equipment ○ Discoveries ○ ...● Potential high value in sharing all that data and mining it
    • Problems● Lots of name-centric, thus highly ambiguous, data sets● Different conceptual spaces● Different positions that not always correspond ○ "Maître de conférences" ~ "Universitair Docent" ~ "Assistant professor" ?
    • Towards THE information system (?)● Try to be the "Facebook for researchers"● Eventual focus on sub-parts of the data
    • or THE ontology (?)● Focus on the terminology, allow for different data stack (including non Web based)
    • Users end-up with a tough choice● Do you prefer too specific or too generic ?● Workaround: formats roundtripping
    • But data does not travel well...● Publications from Frank van Harmelen● Decreasing number from system to system 148 38 13
    • Downscaling RIS● Some of the harmonization high costs ○ Large ontologies are hard to design ○ Tradeoff coverage VS expressivity ○ Large amount of data ○ Lack of incentives to update one platform + branding and reporting issues playing against● Alternative ○ Rely on a data ecosystem ○ Use several, layered ontologies
    • A research information ecosystem
    • Core ontology + national extensions● Global scale insights and low level details● Take advantage of reasoning
    • Cloud-less social interaction
    • Context● XO laptop given to 2M kids aged 6-12● Low-end hardware (~ old smartphone)● Educational software based on constructivism● Communication via Mesh-networking
    • The environment "Sugar"
    • Activities in Sugar● A Sugar activity combines the concepts of “document” and “application” into a single object● Activities can be easily shared between neighbouring computers● Activity instances are associated with the document they let the user work on
    • Sharing activities
    • Journal of activity usage
    • Limitations of current data stack● Data sharing limited to synchronous interaction● Data isolated in silos● No remote access to data created within a Sugar instance● Social activity bounded by the classroom
    • Lets improve this, Web 2.0 way !● Create a central server on the Cloud and define an API● Create activities interacting via the API● Add a Web frontend for authentication and adjust ACLs for the API + + =
    • Wont work because...● Lack of stable, cheap, connection to Internet● Lack of relevant content on the Web to justify getting a connection● Issues with having kids on social networks● (Besides, potentially hard to find a business model for sharing kids work)
    • Downscaled alternative● Turn every XO into a self-contained data publisher/consumer● Apply Linked Data principles to achieve decentralised data integration
    • More information● Collection of presentation about this and other topics ○ http://www.slideshare.net/cgueret● Blog about making data sharing a reality for everyone ○ https://worldwidesemanticweb.wordpress.com/● christophe.gueret@dans.knaw.nl