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Dipl.-Math. Stephan Doerfel

  • Universität Kassel, Fachgebiet Wissensverarbeitung
  • Wilhelmshöher Allee 73
  • 34121 Kassel (Germany)
  • Raum 0445F
  • Telefon: +49 (0)561 804-6252
  • Fax: +49 (0)561 804-6259
  • Email:
Stephan Doerfel

about me

My research at Kassel University includes the investigation of scientometrics and webometrics, correlations thereof and their possible applications for recommendations and rankings. Further interests include formal concept analysis, social network analysis, and machine learning in general.
I am also a senior developer of the blue social bookmark and publication sharing system BibSonomy.



You can also find all my publications in BibSonomy.

How Social is Social Tagging?. Proceedings of the Companion Publication of the 23rd International Conference on World Wide Web Companion, 251--252, International World Wide Web Conferences Steering Committee, Republic and Canton of Geneva, Switzerland, 2014. [BibSonomy: 2014 WWW analyis behavior log myown social tagging user] URL

Description-oriented community detection using exhaustive subgroup discovery. Information Sciences, 0:-, 2015. [BibSonomy: community discovery estimate inpress myown optimistic subgroups] URL

Evaluating Assumptions about Social Tagging - A Study of User Behavior in BibSonomy. In Thomas Seidl, Marwan Hassani, and Christian Beecks (Eds.), Proceedings of the 16th LWA Workshops: KDML, IR and FGWM, Aachen, Germany, September 8-10, 2014., 18--19, CEUR-WS.org, 2014. [BibSonomy: 2014 behavior lwa myown navigation tagging] PDF

Mining Social Links for Ubiquitous Knowledge Engineering. In Klaus David, Kurt Geihs, Jan Marco Leimeister, Alexander Roßnagel, Ludger Schmidt, Gerd Stumme, and Arno Wacker (Eds.), Socio-technical Design of Ubiquitous Computing Systems, 109-129, Springer International Publishing, 2014. [BibSonomy: 2014 book localization myown social venus] URL

Ubicon and its applications for ubiquitous social computing. New Review of Hypermedia and Multimedia, (20)1:53-77, 2014. [BibSonomy: 2014 computing framework myown recommender social ubicon] URL

ECML PKDD Discovery Challenge - Recommending Given Names. In Stephan Doerfel, Andreas Hotho, Robert Jäschke, Folke Mitzlaff, and Juergen Mueller (Eds.), (1120)CEUR-WS, 2014. [BibSonomy: 2014 ECMLPKDD editor myown nameling proceedings] URL

Summary of the 15th Discovery Challenge: Recommending Given Names. 15th Discovery Challenge of the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases, ECML PKDD 2013, Prague, Czech Republic - Sctober 27, 2013. Proceedings, (1120):7--24, CEUR-WS, Aachen, Germany, 2014. [BibSonomy: 2014 ECMLPKDD KDE RecSys inproceedings myown nameling summary workshop] URL

Of course we share! Testing Assumptions about Social Tagging Systems. 2014. [BibSonomy: 2014 analysis assumptions bibsonomy data folksonomy log myown share social tagging testing weblog] URL

Deeper Into the Folksonomy Graph: FolkRank Adaptations and Extensions for Improved Tag Recommendations. cs.IR, (1310.1498)2013. [BibSonomy: 2013 bookmarking collaborative folkrank folksonomy graph myown] URL

Tag Recommendations for SensorFolkSonomies. Recommender Systems and the Social Web Workshop at 7th ACM Conference on Recommender Systems, RecSys 2013, Hong Kong, China -- October 12-16, 2013. Proceedings, New York, NY, USA, ACM, 2013. [BibSonomy: 2013 RecSys everyaware folksonomy myown recommendation rsweb sensor tag widenoise]

Informationelle Selbstbestimmung Im Web 2.0 Chancen Und Risiken Sozialer Verschlagwortungssysteme. Vieweg + Teubner Verlag, 2013. [BibSonomy: 2013 info20 info20pub informationelle itegpub myown selbstbestimmung web] URL

An Analysis of Tag-Recommender Evaluation Procedures. Proceedings of the 7th ACM conference on Recommender systems, 343--346, ACM, New York, NY, USA, 2013. [BibSonomy: 2013 BibSonomy core evaluation myown recsys tag] URL

Ubicon: Observing Social and Physical Activities. Proc. 4th IEEE Intl. Conf. on Cyber, Physical and Social Computing (CPSCom 2012), 2012. [BibSonomy: 2012 activities itegpub myown observing physical social ubicon venus venuspub]

Face-to-Face Contacts at a Conference: Dynamics of Communities and Roles. Modeling and Mining Ubiquitous Social Media, (7472)Springer Verlag, Heidelberg, Germany, 2012. [BibSonomy: 2012 conference contacts dynamics face intelligence itegpub kde mining myown social ubiquitous venus venuspub]

Extending FolkRank with content data. Proceedings of the 4th ACM RecSys workshop on Recommender systems and the social web, 1--8, ACM, New York, NY, USA, 2012. [BibSonomy: 2012 content extending folkrank info20pub itegpub myown] URL

Leveraging Publication Metadata and Social Data into FolkRank for Scientific Publication Recommendation. Proceedings of the 4th ACM RecSys workshop on Recommender systems and the social web, 9--16, ACM, New York, NY, USA, 2012. [BibSonomy: 2012 data info20pub itegpub itemRecommendation leveraging metadata myown publication reco recsys social] URL

Publication Analysis of the Formal Concept Analysis Community. In F. Domenach, D.I. Ignatov, and J. Poelmans (Eds.), ICFCA 2012, (7278):77--95, Springer, Berlin/Heidelberg, 2012. [BibSonomy: 2012 analysis community concept fca home info20pub itegpub myown scientometrics] PDF

Face-to-Face Contacts during LWA 2010 - Communities, Roles, and Key Players. Working Notes of the LWA 2011 - Learning, Knowledge, Adaptation, 2011. [BibSonomy: 2011 analysis contacts face itegpub kde lwa myown venus venuspub]

Face-to-Face Contacts during a Conference: Communities, Roles, and Key Players. Proc. Workshop on Mining Ubiquitous and Social Environments (MUSE 2011) at ECML/PKDD 2011, 2011. [BibSonomy: 2011 analysis communities community discovery face itegpub knowledge mining myown rfid venus venuspub]

Resource-Aware On-line RFID Localization Using Proximity Data. ECML/PKDD (3), 129-144, 2011. [BibSonomy: 2011 classification itegpub localization myown prediciton proximity resource-aware rfid room-level venus venuspub] URL

Privatsphären- und Datenschutz in Community-Plattformen: Gestaltung von Online-Bewertungsportalen. In Hans-Ulrich Heiß, Peter Pepper, Holger Schlingloff, and Jörg Schneider (Eds.), Informatik 2011 - Informatik schafft Communities - Proceedings der 41. GI-Jahrestagung, (192):412, Bonner Köllen Verlag, October 2011. [BibSonomy: 2011 community gi info20 info20pub itegpub myown privat] URL

Enhancing Social Interactions at Conferences. it - Information Technology, (53)3:101--107, Oldenbourg Wissenschaftsverlag GmbH, May 2011. [BibSonomy: 2011 conferator conference enhancing interaction itegpub journal myown social talkradar venus venuspub] URL

A Context-Based Description of the Doubly Founded Concept Lattices in the Variety Generated by M_3. In Petko Valtchev, and Robert Jäschke (Eds.), Formal Concept Analysis, (6628):93-106, Springer, Berlin / Heidelberg, 2011. [BibSonomy: 2011 characterization context da itegpub modular myown variety] URL

The Scaffolding of a Formal Context. In Marzena Kryszkiewicz, and Sergei Obiedkov (Eds.), Concept Lattices and Their Applications 2010, (672):283-293, CEUR-WS, November 2010. [BibSonomy: 2010 cla cla2010 context da fca itegpub myown scaffolding] PDF


pc chair

pc member




Sommersemester 2015

Information on previous courses can be found here at BibSonomy. In each term we offer several student projects in the context of the web 2.0 and of knowledge discovery.