1. the physics departments and documents network CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de Distributed Portals for Physics

2. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 1 What are Distributed Portals?  Knowledge in Physics is produced spread all over the world, even away form earth.  Information is published in a distributed way -Institutional Webserver -Online Journals -Print-only Journals  Information is available in different genres -Refereed articles -Peer-reviewed online-publications -Software -Datasets

3. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 2 What are Distributed Portals?  Portals collect existing information form different sources  Portals present information in a common desktop -Separation of content and layout  Distributed Portals -Collect existing content from distributed sources (web-server) -Extract content from layout Meta-information required

4. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 3 Distributed Workforce  Distributed Content -Biggest example is the Web...  Distributed Workforce -Much more complicate Quality-problem Problem of continuity Problem of politics and interests -Charter Define common goals

5. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 4 Distributed vs. Centralised  Centralised -High information structure -Common layout -Easy navigation through the information  Distributed -Up to date information -Low budget implementation -Good information coverage

6. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 5 Portal Collector Distributed Portals – a technical view  Collecting module  Content extractor  Portal  Mirror system Source ASource BSource C Content extractor Portal ?

7. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 6 XML-Query Distributed Search-Engines Search-Engine A Search-Engine B Search-Engine C Search-Engine D Common Search SINN-Project by DFN e.V. http://www.isn-oldenburg.de/projects/SINN/

8. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 7 Examples of Portals in Physics  PhysNet (distributed portal)  ProPhysik.de (centralised portal)  Fachwelt-Physik (distributed portal)

9. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 8 PhysNet www.physics-network.org

10. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 9 PhysNet www.physics-network.org  Over 5.300 links of Physics Departments and Document-Collections  Service maintained in 8 countries on 4 continents  Web-Sites mirrored on 10 servers all over the world  Approx. 25.000 users every month  16 members ((inter)national Physical Societies)

11. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 10 ProPhysik.de

12. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 11 Fachwelt-Physik www.fachportal-physik.de

13. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 12 Fachwelt-Physik  Bilingual: English and German  Views: -Mozilla-based browser -Print-out version -Text-only version -Robot-optimised version with metadata  Maintained at numerous sites

14. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 13 Future Focuses in this Field  Development and implementation of interfaces for distributed search-engines  Development of new services  Continuous maintenance of running portals

15. the physics departments and documents network www.physics-network.org CRIS2002, Kassel, 29-31 Aug 2002 Thomas Severiens, severiens@isn-oldenburg.de 14 Many thanks for your attention! For additional information please visit www.isn-oldenburg.de