Open Data & Education Seminar, ITMO, St Petersburg, March 2014
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Transcript of Open Data & Education Seminar, ITMO, St Petersburg, March 2014
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Motivation Data on the Web
Some eyecatching opener illustrating growth and or diversity of web data
Learning & Education with the Web of Data
Stefan Dietze (L3S Research Center, DE,
@stefandietze, http://purl.org/dietze)
Stefan Dietze 10/03/14
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Research areas
Web science, Information Retrieval, Semantic Web & Linked Data, data & knowledge integration (mapping, classification, interlinking)
Application domains: education/TEL, Web archiving, …
Some projects
Introduction
http://www.l3s.de/
Stefan Dietze 10/03/14 2
See also: http://purl.org/dietze
(Linked) Web data & education
Early activities in the field: tutorials, workshops, competitions (LILE – Linked Learning, LAK Data Challenge…)
http://linkededucation.org & http://linkeduniversities.org
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5
Open Education requires Open Data
(Open) Educational Resources
World
Wide
Web
Distance Universities
Linked Open Data
MOOCs
Stefan Dietze 10/03/14
http://linkededucation.org &
http://linkeduniversities.org
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Actually, how “open” is open educational data? Just a short while ago...
Educational Data on the Web
Open Educational Resource (OER) metadata & MOOC collections (e.g. OCW, OpenLearn, Merlot, Coursera)
Competing Web interfaces (e.g. OAI-PMH, SOAP, REST)
Competing metadata standards (e.g. IEEE LOM, ADL SCORM, DC…) & taxonomies & exchange formats (JSON, RDF, XML)
Issues: heterogeneity & lack of interoperability
Stefan Dietze 10/03/14
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Actually, how “open” is open educational data? Just a short while ago...
Linked (Open) Data
Vision: well connected graph of open Web data
W3C standards (RDF, SPARQL) to expose data, URIs to interlink datasets => cloud of interconnected datasets
32 billion triples (2011), crossing all sorts of domains
Other incarnations: Google Knowledge Graph, schema.org, FB Open Graph…
Educational Data on the Web
Open Educational Resource (OER) metadata & MOOC collections (e.g. OCW, OpenLearn, Merlot, Coursera)
Competing Web interfaces (e.g. OAI-PMH, SOAP, REST)
Competing metadata standards (e.g. IEEE LOM, ADL SCORM, DC…) & taxonomies & exchange formats (JSON, RDF, XML)
Issues: heterogeneity & lack of interoperability
Pictures (c) by Paul Miller
Stefan Dietze 10/03/14
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A shorter while ago Bringing OER into the LOD landscape
http://datahub.io/dataset/meducator
Manually curated and automatically exported & enriched OER from variety of sources
> 35000 triples so far
> enrichments to DBpedia & Bioportal ontologies
APIs used by several applications
Automated data lifting & enrichment
Stefan Dietze 10/03/14
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Using LD in (medical) educational applications Recommending educational resources across repositories
http://metamorphosis.med.duth.gr
Using LD for integrating educational resources from range of universities and OER repositories (eg Open Learn, Open Courseware etc)
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“Structured” descriptions of OER? http://metamorphosis.med.duth.gr
Metadata of educational resource (virtual patient) lifted into RDF
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?
Making sense of (medical) educational data
Stefan Dietze 10/03/14
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?
?
?
?
Making sense of (medical) educational resources
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!
!
Entity recognition (NER) & disambiguation, via
Stefan Dietze 10/03/14
Adding semantics to OER descriptions
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!
Disease
Life Sciences
Medicine
ofType
One simple link – lots of knowledge/semantics
Stefan Dietze 10/03/14
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before
vs
after
Embedding educational repositories into a joint graph
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Linked Data for Learning – How is it useful?
Stefan Dietze
1. Linked Data for data sharing, enrichment and interpretation
RDF, SPARQL & shared vocabularies to improve interoperability of learning/user data
facilitate OER reuse vision across isolated platforms
2. Linked Data as body of knowledge for learning & education
Vast amount of publicly available resources and data
Dedicated OER and university data + „knowledge resources“ (from DBpedia to Slideshare)
Interlinking educational Resources and the Web of Data – a Survey of Challenges and Approaches, Stefan Dietze, Salvador Sanchez-Alonso, Hannes Ebner, Hong Qing Yu, Daniela Giordano, Ivana Marenzi, Bernardo Pereira Nunes, Emerald Program: electronic Library and Information Systems, Volume 47, Issue 1 (2013).
Linked Data for Open and Distance Learning, Mathieu d’Aquin, report for the Common Wealth of Learning,
„HTTP-accessibility“ (SPARQL, URI-dereferencing)
„Structure“ & „Semantics“ (=> shared/linked vocabularies)
„Interlinked“
„Persistent“
10/03/14
http://linkededucation.org &
http://linkeduniversities.org
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Success models: data & applications
Stefan Dietze 10/03/14 18
LinkedUp Challenge to identify innovative tools & applications
Evaluation methods and approaches
“LinkedUp” – Linking Web Data for Education L
Data curation
Technology transfer & community-building
Collecting & exposing open data of educational relevance => LinkedUp Data Catalog
Profiling and linking of Web Data for education => educational data graph
Disseminating knowledge & building communities (educators, computer scientists, data engineers)
Gathering stakeholder feedback: use cases, and requirements
European project aimed at advancing take-up of open data and related technologies
http://linkedup-challenge.org/#usecases
http://linkedup-project.eu/events
http://www.linkedup-challenge.org/
http://data.linkededucation.org
http://linkedup-project.eu
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LinkedUp Network LinkedUp Consortium
LinkedUp Advisory Board
Stefan Dietze 10/03/14
“LinkedUp” – Linking Web Data for Education L
European project aimed at advancing take-up of open data and related technologies
http://linkedup-project.eu
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Too many/diverse datasets, too little information
Stefan Dietze 10/03/14
? ? ?
Which datasets are useful & trustworthy for case XY (eg „learning about the solar system“) ?
Which topics (eg „Astronomy“) are covered by dataset X?
Which datasets offer videos (slides, publications, statistics etc)?
? ? ?
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Data curation and dataset profiling
LinkedUp
Dataset Catalog
Stefan Dietze 10/03/14
Catalog of data (LinkedUp Catalog): classification of datasets according to resource types, disciplines/topics, data quality, accessability, etc
Infrastructure for distributed/federated querying
describes
Which datasets are useful & trustworthy for case XY (eg „learning about the solar system“) ?
Which topics (eg „Astronomy“) are covered by dataset X?
Which datasets offer videos (slides, publications, statistics etc)?
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LinkedUp Data Catalog in a nutshell
http://datahub.io/group/linked-education
http://data.linkededucation.org/linkedup/catalog/
RDF (VoID) dataset catalog: browse & query distributed datasets
Live information about endpoint accessibility
Federated queries using type mappings
Stefan Dietze 10/03/14
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What’s all the data about? - exploring topics/disciplinesll
Stefan Dietze 10/03/14
Exploring of dataset-topic-graph (datasets, topics, relationships)
More during demo session
http://data-observatory.org/lod-profiles/
A Scalable Approach for Efficiently Generating Structured Dataset Topic Profiles, Fetahu, B., Dietze, S., Nunes, B.P., Cassanova M., Nejdl, W. (2014), 11th Extended Semantic Web Conference, ESWC2014, Greece, May 2014.
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LinkedUp Challenge: using open data for learning
Open Data Competition to promote tools and applications that analyse / integrate (Linked) Web data
Organised by LinkedUp project over 2 years (“Veni”, “Vidi”, “Vici”) with 40.000 EUR awards
Veni Competition - 22 submissions, 8 shortlisted for presentation at Open Knowledge Conference (17 September, Geneva Switzerland)
Vici competition to be announced soon
http://linkedup-challenge.org
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“Veni” shortlist & winners
DataConf.
KnowNodes
Mismuseos
ReCredible
YourHistory
10/03/14
http://www.globe-town.org/
WeShare - 3rd price / people‘s choice
GlobeTown - 2nd price
http://seek.cloud.gsic.tel.uva.es/weshare/
http://www.polimedia.nl/
PoliMedia – 1st price
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Open educational data - some more resources
LinkedUp Challenge – Vici Competition (http://www.linkedup-challenge.org)
Calls coming soon
Learning Analytics & Knowledge Dataset (http://lak.linkededucation.org)
+ associated annual challenge
data.l3s.de – the L3S DataHub (http://data.l3s.de)
Pointers to several of the mentioned datasets
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Linked Data as enabler for educational resources sharing
Interpretation of user & resource (meta)data
Understanding of learning contexts
Tools & data for data disambiguation and integration
Cross-platform recommendations and analytics
Linked Data as body of knowledge for learning
Dedicated educational/learning content
Repurposing of knowledge resources (social media etc)
Challenge (=> LinkedUp)
Noise & diversity
Vici calls to be announced soon
Conclusions
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Thank you!
WWW See also (data)
http://datahub.io/group/linked-education
http://data.linkededucation.org
http://data.l3s.de
http://data.linkededucation.org/linkedup/catalog/
http://lak.linkededucation.org
See also (general)
http://linkedup-project.eu
http://linkedup-challenge.org
http://linkededucation.org
http://linkeduniversities.org
http://purl.org/dietze
10/03/14 32 Stefan Dietze
PROFILES workshop @ ESWC2014 (http://keystone-cost.eu/profiles2014)
Deadline: 14 March
Linking User Data 2014 at UMAP2014 (http://liud.linkededucation.org)
Deadline: 1 April
Online Learning & LD Tutorial at WWW2014 (http://www2014.kr/)
07 April, Seoul