Jun.-Prof. Dr. rer. nat. Robert Jäschke
- Leibniz Universität Hannover, Fakultät
für Elektrotechnik und Informatik,
Fachgebiet Wissensbasierte Systeme (KBS)
- Appelstraße 4
- 30167 Hannover
- Room: 203
- Phone.: +49 511 762-17775
- Fax: +49 511 762-19712
- Email: (no Word attachments!)
- For Spammers:
- PGP-Key: 0x58E3F166 (F953 73B6 7308 63AC AC38 F393 6CDA 833D 58E3 F166)
Research
My research is focused on the development and integration of algorithms for
community detection,
ranking and
recommendations into
collaborative tagging systems.
Further topics of interest include
citation and link analysis,
entity matching and resolution, and
social network analysis.
Furthermore, I am leading the development of our own system, BibSonomy, which is used as test-bed for our
methods and results.
Publications
- My top publications:
- L. Balby Marinho, A. Hotho, R. Jäschke, A. Nanopoulos, S. Rendle, L. Schmidt-Thieme, G. Stumme, and P. Symeonidis, Recommender Systems for Social Tagging Systems. SpringerBriefs in Electrical and Computer Engineering, Springer, Feb. 2012.
- L. Balby Marinho, A. Nanopoulos, L. Schmidt-Thieme, R. Jäschke, A. Hotho, G. Stumme, and P. Symeonidis, "Social tagging recommender systems,” in Recommender Systems Handbook (F. Ricci, L. Rokach, B. Shapira, and P. B. Kantor, eds.), pp. 615–644, Springer, 2011.
- D. Benz, A. Hotho, R. Jäschke, B. Krause, F. Mitzlaff, C. Schmitz, and G. Stumme, "The social bookmark and publication management system BibSonomy," The VLDB Journal, vol. 19, pp. 849–875, Dec. 2010. PDF
- R. Jäschke, A. Hotho, C. Schmitz, B. Ganter, and G. Stumme, "Discovering Shared Conceptualizations in Folksonomies," Web Semantics: Science, Services and Agents on the World Wide Web, vol. 6, pp. 38–53, Feb. 2008. PDF
- My PhD thesis: R. Jäschke, Formal Concept Analysis and Tag Recommendations in Collaborative Tagging Systems, vol. 332 of Dissertationen zur Künstlichen Intelligenz. Akademische Verlagsgesellschaft AKA, Jan. 2011.
- My diploma thesis: R. Jäschke, "Die Struktur der Monoide binärer Relationen auf endlichen Mengen," (English: The structure of monoids of binary relations on finite sets), Technische Universität Dresden, Apr. 2005. PDF (25.04.2005, German)
Events
PC/Workshop Chair
- ECML PKDD Discovery Challenge 2013, September 23 - 27, 2013, Prague, Czech Republic
- 9th International Conference on Formal Concept Analysis (ICFCA 2011), May 2 - 6, 2011, Nicosia, Cyprus
- ECML PKDD Discovery Challenge 2009, September 7, 2009, Bled, Slovenia
- Workshop "Knowledge Discovery, Data Mining, Maschinelles Lernen 2008" der Fachgruppe KDML, 6. - 8. Oktober 2008, Würzburg
- ECML PKDD Discovery Challenge 2008, September 15, 2008, Antwerp, Belgium
- Third Conceptual Structures Tool Interoperability Workshop (CS-TIW 2008), July 7, 2008, Toulouse, France (Proceedings)
PC Member
- European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD), September 23 - 27, 2013, Prague, Czech Republic
- ESWC PhD Symposium, May 26 - 30, 2013, Montpellier, France
- Seventh International Conference on Knowledge Capture K-CAP, June 23 - 26, 2013, Banff, Canada
- 11th International Conference on Formal Concept Analysis (ICFCA 2013), May 21 - 24, 2013, Dresden, Germany
- Making Sense of Microposts Workshop (#MSM2013) at WWW 2013, May 13, 2013, Rio de Janeiro, Brazil
- Hypertext 2013: 24th ACM Conference on Hypertext and Hypermedia, May 1 - 3 2013, Paris, France
- Formal Concept Analysis meets Information Retrieval Workshop (FCAIR) at ECIR, March 24, 2013, Moscow, Russia
- 6th ACM International Conference on Recommender Systems - RecSys 2012, September 9th - 13th, 2012, Dublin, Ireland
- 13th International Conference on Electronic Commerce and Web Technologies - EC-Web 2012, September 3 - 7, 2012, Vienna, Austria
- First Workshop on the Social Web of Intelligent Things & People (SWITP 2012) at ECAI, August 27 - 31, 2012, Montpellier, France
- 10th International Conference on Formal Concept Analysis (ICFCA 2012), May 6 - 10, 2012, Leuven, Belgium
- 21st World Wide Web Conference - WWW 2012, April 16th - 20th, 2012, Lyon, France
- 5th ACM International Conference on Recommender Systems - RecSys 2011, October 23rd - 27th, 2011, Chicago, Illinois
- 2nd Challenge on Context-aware Movie Recommendation, October 27, Chicago, Illinois
- 12th International Conference on Electronic Commerce and Web Technologies - EC-Web 2011, August 29 - September 2, 2011, Toulouse, France
- Sixth International Conference on Knowledge Capture K-CAP, June 25th - 29th, 2011, Banff, Canada
- Hypertext 2011: 22nd ACM Conference on Hypertext and Hypermedia, June 6th - June 9th 2011, Eindhoven, The Netherlands
- Making Sense of Microposts Workshop (#MSM2011) at ESWC 2011, May 29/30, 2011, Heraklion, Crete
- Workshop "Knowledge Discovery, Data Mining, Maschinelles Lernen 2010" der Fachgruppe KDML, 4.-6. Oktober 2010, Kassel, Germany
- Personal Semantic Data Workshop, October 2010, Lisbon, Portugal
- Challenge on Context-aware Movie Recommendation, September 30, 2010, Barcelona, Spain
- 34th Annual Conference of the German Classification Society (GfKl 2010), July 21 - 23, 2010, Karlsruhe
- Extended Semantic Web Conference, May 30 - June 3 2010, Heraklion, Greece
- Workshop "Knowledge Discovery, Data Mining, Maschinelles Lernen 2009" der Fachgruppe KDML (21. - 23. September 2009, Darmstadt)
- K-CAP 2009: The Fifth International Conference on Knowledge Capture, September 1 – 4, 2009, Redondo Beach, California
- Hypertext 2009: 20th ACM Conference on Hypertext and Hypermedia, June 29th - July 1st 2009, Torino, Italy
- AAAI-SSS-09: Social Semantic Web: Where Web 2.0 Meets Web 3.0, 23 - 25 March 2009, Stanford, California
- Viszards Session at Sunbelt 2009, 10 - 15 March 2009, San Diego, California
- Mining Social Data (MSoDa), a satellite Workshop of the 18th European Conference on Artificial Intelligence (ECAI 2008)
Talks
- Tutorial "Ontology Learning from Folksonomies" held at
- Euro-NF Summer School on Modeling and Analysis of Novel Mechanisms in Future Internet Applications, March 28th - April 4th, 2012, Wuerzburg, Germany
- 9th International Conference on Formal Concept Analysis (ICFCA 2011), May 2 - 6, 2011, Nicosia, Cyprus (PDF)
- 6. Konferenz Professionelles Wissensmanagement, February 21 - 23, 2011, Innsbruck, Austria
- EKAW 2010 - Knowledge Engineering and Knowledge Management by the Masses, October 11 - 15, 2010, Lisbon, Portugal
Projects
BibSonomy
Much of our research is focused around our social bookmark and
publication sharing system BibSonomy. The system is online
since 2006 with me being the main developer since 2005. If you are
interested in a cooperation, just let me know.
Together with the University Library Kassel we are extending the BibSonomy platform in the DFG-funded PUMA project for academic publication management.
Fun
- I am currently playing around with an Arduino and built a book lending system for our group's library.
- Based on the Perl module HTTP::Proxy, the Black & White HTTP Proxy converts HTML pages into black & white, including images.
Teaching / Lehre
Bachelor- und Masterarbeiten
Themen
- Verarbeitung großer Datenmengen mit Hadoop
- Informationsextraktion aus Webseiten
- Visualisierung von Tri-Verbänden
- Improving Information Extraction with Collective Intelligence
Des weiteren biete ich folgende Themen für Projektarbeiten im Rahmen des Labors Web-Technologien an:
- Import von Publikationsmetadaten
- Gruppenkonzept für BibSonomy
- Community-Posts für BibSonomy
- Projektarbeitsthemen rund um BibSonomy
Ablauf
Eine Woche nach der Annahme des Themas geben Sie eine einseitige Beschreibung der Aufgabe, sowie einen Arbeitsplan für das Semester ab. Zur besseren Koordination und Kommunikation wird erwartet, dass Sie regelmäßig an einem Tag in der Softwarewerkstatt anwesend ist. Der genaue Tag ist in Absprache mit dem Betreuer festzulegen.
Masterarbeiten: In der Regel sollte die Arbeit mit Semesterbeginn begonnen werden. Nach 4-6 Wochen findet eine Zwischenpräsentation statt, in der der Stand der Arbeit vorgestellt wird. In der Regel in der ersten Vorlesungswoche des folgenden Semesters werden dann die Endergebnisse vorgestellt.
Als Richtlinie für die Erstellung einer guten Ausarbeitung wird das Buch
Deininger, Markus; Lichter, Horst; Ludewig, Jochen; Schneider, Kurt: Studien-Arbeiten: ein Leitfaden zur Vorbereitung, Durchführung und Betreuung von Studien-, Diplom- Abschluss- und Doktorarbeiten am Beispiel Informatik. 5. Auflage, Zürich: vdf Hochschulverlag, 2005. – ISBN 3-7281-3012-5
empfohlen, welches in der Bibliothek in einigen Exemplaren ausleihbar ist. Ich empfehle die Anschaffung dieses Buchs (9,50 €), da es Sie bis zur Masterarbeit (und weiter) begleiten kann. Die Bewertung der Arbeit erfolgt auf Grundlage des Schemas auf Seite 77 des Buches.
Alle verwendeten Referenzen sind zusätzlich zum Literaturverzeichnis der Ausarbeitung in BibSonomy einzugeben und mit sinnvollen Tags zu versehen.
Sommersemester 2013
Informationen und Material zur Vorlesung Künstliche Intelligenz I finden Sie in Stud.IP.
Wintersemester 2012/2013
- Lecture Formal Concept Analysis (slides and exercises)
Source Code
Some of my source code is available on GitHub, other code is linked here.
- FolkRank
- FolkRank is an algorithm for search and ranking in collaborative tagging systems. It has been integrated into the community support architecture of the social semantic desktop developed by the NEPOMUK project. The source code is available from the project's SVN repository.
- Trias
- Trias is an algorithm for computing triadic concepts which fulfill minimal support constraints. The source code is available on the project page.
- BibSonomy
- Some of the modules which BibSonomy is based on are available in a Maven repository. There is also a project page which contains an issue tracker. Examplary code snippets can be found in the bibsonomy-tools project on GitHub.
Data Sets
We publish regular
snapshots of the BibSonomy database. There you can also find the
datasets of the ECML PKDD Discovery Challenges 2008 and 2009.
More recently, we made available a dataset
of FCA-related publications including their citations.
Interesting Links
- International Conference on Conceptual Structures (ICCS)
- Conceptual Structures - central page for friends of Conceptual Graphs (CG), Formal Concept Analysis (FCA) and ICCS
- my old homepage at the University of Kassel
- my (really) old homepage
- Building 041 (former headquarter of AGFA/ORWO film factory Wolfen)
- Anleitung zur Deaktivierung der LCD-Beleuchtung einer Canon EOS 600 (english version: Instruction on deactivating the LCD-backlight of a Canon EOS 600, also available on this server)
- myBibSonomy