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4th Int. Alexandria Workshop (19./20. October 2017)

Foundations for Temporal Retrieval, Exploration and Analytics in Web Archives

19./20. October 2017

Significant parts of our cultural heritage are produced on the Web, yet only insufficient opportunities exist for accessing and exploring the past of the Web. While the easy accessibility to the current Web is a good baseline, optimal access to Web archives requires new models and algorithms for retrieval, exploration, and analytics which go far beyond what is needed to access the current state of the Web. This includes taking into account the unique temporal dimension of Web archives, structured semantic information already available on the Web, as well as social media and network information.

The workshop aims at bringing together communities involved in information retrieval, social network analysis and NLP to encourage a closer dialogue between researchers..

Workshop Program

Thursday, 19.10.2017   

9:30 – 10:00 Opening Coffee


10:00 – 10:15 Alexandria Workshop
  • Opening Remarks: Wolfgang Nejdl: 

10:15 – 11:45 Session 1 – Collaborative Exploration and Analytics


11:45 – 13:00  Lunch with Posters/Demo Session

13:00 – 14:30 Session 2 – Entity-based Enrichments

  • Roberto Navigli (La Sapienza, Rome)- Multilinguality for free, or why you should care about linking to (BabelNet) synsets
  • Pavlos Fafalios (L3S) – Building and Querying Semantic Layers for Web Archives
  • Simon Gottschalk (L3S) – Events beyond Languages and Schema Constraints: Detection, Representation and Perception

14:30 – 15:00  Coffee Break


15:00 – 16:30 Session 3 – Temporal and Entity-based Retrieval

  • Bhaskar Mitra – (Microsoft Research/UCL) : Neural Models for Document Ranking
  • Helge Holzmann (L3S) – Exploring Web Archives Through Temporal Anchor Texts
  • Matthias Hagen (Bauhaus Uni. ) : Axiomatic Result Re-Ranking


16:30 – 17:30 : Keynote by Arjen De Vries (Radboud University) – Web Archives and the dream of the Personal Search Engine


Friday, 20.10.2017  


10:00 – 11:30   Session 4 – Social Networks and Streams
  • Vinay Setty (Uni. Stavanger) – Neural models for news events
  • Tuan Ahn Hoang (L3S) – Modeling Topics and Behaviors of Microbloggers: An Integrated Approach
  • Eirini Ntoutsi (Uni. Hannover) — Learning with limited labels (over streams).


11:30 – 13:00 Lunch with Posters/Demo Session


13:00 – 14:30 Session 5 – Testbeds (Wikipedia, News, Politics, Academic Web, crowdsourcing for evaluation)
  • Arunav Mishra – (MPI, Saarbruecken) : Connecting Wikipedia to News
  • Besnik Fetahu (L3S)- Citation span detection
  • Markus Rokicki (L3S)- Crowd Sourcing at Scale


14:30 – 15:00  Coffee Break


15:00 – 15:30  Panel Discussion “Ideas for Future Research”


Since the capacities of the room is limited we like to ask to register as soon as possible by sending an email  with the subject “Alexandria WS Registration” to



L3S Research Center
Appelstrasse 9a, 15th Floor, Multimedia Room
30167 Hannover / Germany



We recommend hotel rooms in the Hotel Schlafgut (nearby L3S) and the  Concorde Hotel Am Leineschloss (Old City Center).

Further Question & Information

For further questions and information please contact alexandria-info@L3S.de.