the physics departments and documents network eunis conference, bled, june 29 th -july 2 nd 2004...
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EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker: schlenker@isn-oldenburg.de
the physics departments and documents network
Dynamic Thesaurus and Dynamic Discovery of
DistributedeLearning Materials
Michael Schlenker
Eberhard R. Hilf
Julika Mimkes
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Institute for Science Networking GmbH Develop new concepts and services
for the management of information in science
Develop and operate Internet portals for science and its subject areas
Develop tools for networking of and access to scientific information
Offer services around the learnmangement system Campus Virtuell
Plays an active role in national, international and interdisciplinary boards and initiatives concerning standardization and information services for sciences
http://www.isn-oldenburg.de
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Overview PhysNet and physik multimedial The web crawler system Adapting the crawler to eLearning First Tests
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
• Distributed service
• Catalogue style link lists of institutions, publication repositories and educational collections
• HARVEST search engine
• Search in LiLi , database
P h ysD epP h ys ics D e p artm e n ts
P h ysD ocP h ys ics D o cum e n ts
E d uca tion
www.PhysNet.ne t
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
physik multimedial Learning Platform
Course Management
Module Collection
Exercises Collection
Links to eLearning material in Physics
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
SHRIMPS
Simple HTTP Robot to IMprove Physnet Services
Specialized web crawler developed to find publications on personal or institutional webpages
Increases coverage and reduces noise in contrast to general purpose search engines
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
SHRIMPS for Publications Tested on European
part of PhysDep (1810 links)
Using part of a physics thesaurus generated from ArXiv and IOP metadata for classification
Tests show an 28% increase in the number of objects collected by HARVEST
The resulting relative amount of relevant objects was improved
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Publications vs. eLearning material
Digital libraries
Publications deposited at personal or institutional repositories
SHRIMPS finds publications in personal or institutional repositories
Learning management systems
Material deposited at personal or institutional repositories
Can SHRIMPS find eLearning material ?
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Resource discovery From LM Systems Resources can typically be
discovered only with cooperation of the LMS
Resources in LMS are typically structured and annotated with metadata (LOM, DC, others).
Resource discovery from LMS is complex, requiring standardized metadata and interfaces.
From Webpages Resources can be
discovered without cooperation
Resources are typically unstructured and lack metadata
Resource discovery from the web is a problem of identifying resources.
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.deAuthors Institutional, Workgroup or
Personal Websites
Users
HARVEST
HTTP
SHRIMPS and HARVEST
SHRIMPS
UIDB
SOAP
HTTP
Operator/Reviewer
URLs
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
How SHRIMPS works Crawl over a webserver
by following links Only follow links that
appear like they could lead to relevant data
Pages reached are classified as relevant, if their trail of links or their content appearance suggests their relevance
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
SHRIMPS Implementation Based on the highly portable and
mature Tcl (Tool Command Language) language
TclHttpd application server provides Web GUI and job control
Tcl based tuplespace with TclSOAP provides communication between components
Tclkit helps with easy deployment
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
SHRIMPS User InterfaceWeb browser based user interface provides access to:
User management
Job management
Review of result sets
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Browser based review ToolA fast and efficient XML SOAP based tool for rating web pages, usually with a single mouseclick, is under development.
Current version is implemented using the Mozilla XUL technology.
Support for other browsers could be developed if requested by our operators.
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Adapting SHRIMPS on Learning Material
Create new list of terms characteristic for eLearning
Examine typical webservers to understand where eLearning material is ‚hidden‘.
Refine the lists and exclusion patterns
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Test Setup 82 Institutions from the UK and Germany
listed in the PhysDep list of physics departments
Physics term list from former publications search used, enhanced with some field specific terms
Filter lists created by hand from examination of some servers
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Results of Test Run924
540
217
35
Irrelevant
eLearningrelevant
Personalhomepages
Scientificpublications
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Examining the results About 30% relevant URLs Ratio of relevant to irrelevant is better than for
brute-force indexing Results are more heterogeneous for
eLearning material than for publications
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Looking at staff homepages Publications are very often linked Learning material is only seldom linked
Hypothesis:(External) reputation is primarily gained by publications today. The increasing visibility of teaching through eLearning will create a reputation for teaching.
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
Future Work Promote the use of open interfaces for LMS
(OAI-PMH) Integrate the SHRIMPS results into the
Education part of PhysNet Adjust the system with the gained experience
the physics departments and documents network
www.physnet.net
EUNIS Conference, Bled, June 29th-July 2nd 2004
Michael Schlenker schlenker@isn-oldenburg.de
LinksPhysNet
http://www.physnet.net
physik multimedial http://www.physik-multimedial.de
Institute for Science Networking Oldenburg GmbHhttp://www.isn-oldenburg.de
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