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Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University Library Erasmus University Rotterdam,NL
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Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

May 12, 2015

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Page 1: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Thesaurus driven semantic search applied to structuring Electronic Learning Environments

London, ILI, October 17 2006

Jan Jüngen, Liesbeth MantelUniversity LibraryErasmus University

Rotterdam,NL

Page 2: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Meet Wilco(Assistant Prof. Educational & Cognitive Psychology) Problem Based Learning (PBL)

PsyWeb Learning Environment

Strong Views on search strategies

Strong Views on UL supportive role

Page 3: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Problem Based Learning (PBL)

Self-study system ‘Closed curriculum’: series of Theme Blocks ‘Starting Problem’ or - assignment ‘Task Manual’: all process information Tutorial Group (8-10) meetings once a week Tutor: only guides group process

Finding your own way is essential

Page 4: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

PsyWeb Learning Environment

Supports PBL-system Contains e-books, e-journals, video

fragments, curriculum information, links to UL licenced content

Enables students to learn by Searching and retrieving information Conducting experiments Realising team efforts Receiving comments

Page 5: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Search strategies & PBL

Sequence of Blocks: changing roles Novice => Expert => Novice => Expert Dialectic learning process Novice needs Associative search Expert needs Expert search Novice + Expert need Graphic

Representation

Searching is NOT finding information Searching = Learning

Page 6: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Learning process supporters & PBL

Tutor Supports learning processes of individuals Applies curriculum metadata to PsyWeb

learning content University Library

Provides access to all curriculum relevant learning content

Provides search and retrieval facilities Provides information skills support

Page 7: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

The PBL-people expect us to deliver more Total integration UL content in PsyWeb All curriculum relevant content (UL licenced

+ PsyWeb) searchable as one entity A semantic tool for associative searching A semantic tool for expert searching A feature that allows tutor metadata to be

included in obtaining semantic search results

Graphic representation of semantic search results

Page 8: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Our offer: Semantic Engine ‘Collexis’

Search Engine Collexis Fingerprint Thesaurus “Proposed concepts” Fully web enabled

Page 9: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

What is a fingerprint?

A profile of a text, person or organization in concepts (keywords) each with its relative weight

Concepts in a fingerprint are selected by comparing the data set with a thesaurus which contains all relevant concepts

A complex set of algorithms determines the selection and weight of each concept in the fingerprint

Fingerprints are created from both the search texts as the texts in the database(s)

Page 10: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Fingerprints… the Collexis concept

Word-basedSearching

What? Why?How? Who?

indexing

(thesaurus)

indexing

(thesaurus)

Conceptmatching√

Page 11: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Fingerprints... Creation

Publication / Text

Excerpt from a Fingerprint

2 - Free text

Thesaurus1 - Thesauri

Page 12: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Enige jaren geleden verscheen het rapport Grond voor Grondgebondenheid van de noordelijke milieufederaties en Groningen Tegen Bio-industrie (GTB). Zij lieten zien, dat de veestapel van de drie noordelijke provincies anno 1996 al meer mest produceerde dan in de landbouw kan worden afgezet bij een min of meer ecologisch verantwoord mestbeleid. Zie ook kaart van mestoverschot naar regio. Het teveel aan mest is niet het gevolg van de intensieve veehouderij, maar komt van de melkveehouderijen. Als de mest van 1998 met een volpropstrategie en de fosfaatnormen van 2005 over al het bouw- en grasland wordt verdeeld, is er in Groningen en Drenthe nog steeds een "tekort" aan fosfaat, maar dat wordt ruimschoots goedgemaakt door de overproductie uit Friesland. Op een totaal van 34,7 miljoen kilo geproduceerd fosfaat had Noord Nederland anno 1998 een mestoverschot van 0,6 miljoen kilo fosfaat. Bij een realistischer afzetscenario (zonder alle gewassen met mest vol te proppen) wordt het overschot nog groter. Verplaatsing van vee naar het Noorden.In 1999 werd voorgesteld om ter ontlasting van andere, zwaar met ammoniak overbelaste provincies 500 bedrijven met rundvee naar de noordelijke provincies te verplaatsen. Die zouden er dan in het Oldambt in de provincie Groningen bij kunnen, want daar is een lokaal mesttekort. Een "lokaal" mesttekort betekent alleen maar dat er in een bepaalde gemeente meer landbouw dan veeteelt wordt bedreven.

Average search = 1.6 words

Page 13: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Collexis demo

Page 14: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Search

Page 15: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Thesaurus Search

Page 16: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Advanced Search

Page 17: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Results, Discussion Semantic techniques: promising appoach for

library services => Learning Environments Much to be desired, though Needed, a long term library investment in:

Professionalizing library staff Raising (far more) funds for development Securing (lasting) support from university teaching

staff Securing (lasting) support from university governors Connecting to private enterprise Seeking university-wide agreement on business

models

Page 18: Thesaurus driven semantic search applied to structuring Electronic Learning Environments London, ILI, October 17 2006 Jan Jüngen, Liesbeth Mantel University.

Colofon & Acknowledgements Erasmus University Rotterdam (EUR), Library

www.eur.nl/ub www.eurlib.nl (EURlib project) [email protected] / [email protected]

(projectmanagement)

Erasmus University Rotterdam, Institute of Psychology [email protected] (Wilco te Winkel) www.psyweb.nl

Collexis [email protected] (Yuri de Lugt) www.collexis.com