@book{doerfel2013informationelle,
  author = {Doerfel, Stephan and Hotho, Andreas and Kartal-Aydemir, Aliye and Roßnagel, Alexander and Stumme, Gerd},
  interhash = {f72d297ba42797ca66baba052c846b7a},
  intrahash = {2bb934c0ff3652843fd0aff97d8d7324},
  isbn = {9783642380556 3642380557},
  publisher = {Vieweg + Teubner Verlag},
  refid = {857973438},
  title = {Informationelle Selbstbestimmung Im Web 2.0 Chancen Und Risiken Sozialer Verschlagwortungssysteme},
  url = {http://www.worldcat.org/search?qt=worldcat_org_all&q=9783642380556},
  year = 2013
}

@inproceedings{atzmueller2012ubicon,
  author = {Atzmueller, Martin and Becker, Martin and Doerfel, Stephan and Kibanov, Mark and Hotho, Andreas and Macek, Bj\"orn-Elmar and Mitzlaff, Folke and Mueller, Juergen and Scholz, Christoph and Stumme, Gerd},
  booktitle = {Proc. 4th IEEE Intl. Conf. on Cyber, Physical and Social Computing (CPSCom 2012)},
  interhash = {a2695fd9fe6e76b252edbd42d72b34ad},
  intrahash = {5ff39a371dadedefd3abba84b26fd0e7},
  title = {Ubicon: Observing Social and Physical Activities},
  year = 2012
}

@incollection{atzmueller2012facetoface,
  address = {Heidelberg, Germany},
  alteditor = {Editor},
  author = {Atzmueller, Martin and Doerfel, Stephan and Hotho, Andreas and Mitzlaff, Folke and Stumme, Gerd},
  booktitle = {{Modeling and Mining Ubiquitous Social Media}},
  interhash = {4f1f4b515b01cc448a91b3e368deabad},
  intrahash = {d81d6f6ccdf3ff6572898d39c90e6354},
  publisher = {Springer Verlag},
  series = {LNAI},
  title = {Face-to-Face Contacts at a Conference: Dynamics of Communities and Roles},
  volume = 7472,
  year = 2012
}

@inproceedings{landia2012extending,
  abstract = {Real-world tagging datasets have a large proportion of new/ untagged documents. Few approaches for recommending tags to a user for a document address this new item problem, concentrating instead on artificially created post-core datasets where it is guaranteed that the user as well as the document of each test post is known to the system and already has some tags assigned to it. In order to recommend tags for new documents, approaches are required which model documents not only based on the tags assigned to them in the past (if any), but also the content. In this paper we present a novel adaptation to the widely recognised FolkRank tag recommendation algorithm by including content data. We adapt the FolkRank graph to use word nodes instead of document nodes, enabling it to recommend tags for new documents based on their textual content. Our adaptations make FolkRank applicable to post-core 1 ie. the full real-world tagging datasets and address the new item problem in tag recommendation. For comparison, we also apply and evaluate the same methodology of including content on a simpler tag recommendation algorithm. This results in a less expensive recommender which suggests a combination of user related and document content related tags.</p> <p>Including content data into FolkRank shows an improvement over plain FolkRank on full tagging datasets. However, we also observe that our simpler content-aware tag recommender outperforms FolkRank with content data. Our results suggest that an optimisation of the weighting method of FolkRank is required to achieve better results.},
  acmid = {2365936},
  address = {New York, NY, USA},
  author = {Landia, Nikolas and Anand, Sarabjot Singh and Hotho, Andreas and Jäschke, Robert and Doerfel, Stephan and Mitzlaff, Folke},
  booktitle = {Proceedings of the 4th ACM RecSys workshop on Recommender systems and the social web},
  doi = {10.1145/2365934.2365936},
  interhash = {7400e35f8d412d15722fe3399aba14a3},
  intrahash = {200a05b24a08dd33e377838ae5bdcf71},
  isbn = {978-1-4503-1638-5},
  location = {Dublin, Ireland},
  numpages = {8},
  pages = {1--8},
  publisher = {ACM},
  series = {RSWeb '12},
  title = {Extending FolkRank with content data},
  url = {http://doi.acm.org/10.1145/2365934.2365936},
  year = 2012
}

@inproceedings{doerfel2012leveraging,
  abstract = {The ever-growing flood of new scientific articles requires novel retrieval mechanisms. One means for mitigating this instance of the information overload phenomenon are collaborative tagging systems, that allow users to select, share and annotate references to publications. These systems employ recommendation algorithms to present to their users personalized lists of interesting and relevant publications. In this paper we analyze different ways to incorporate social data and metadata from collaborative tagging systems into the graph-based ranking algorithm FolkRank to utilize it for recommending scientific articles to users of the social bookmarking system BibSonomy. We compare the results to those of Collaborative Filtering, which has previously been applied for resource recommendation.},
  acmid = {2365937},
  address = {New York, NY, USA},
  author = {Doerfel, Stephan and Jäschke, Robert and Hotho, Andreas and Stumme, Gerd},
  booktitle = {Proceedings of the 4th ACM RecSys workshop on Recommender systems and the social web},
  doi = {10.1145/2365934.2365937},
  interhash = {beb2c81daf975eeed6e01e1b412196b1},
  intrahash = {d3e6fa8023b173228a959914affc8d73},
  isbn = {978-1-4503-1638-5},
  location = {Dublin, Ireland},
  numpages = {8},
  pages = {9--16},
  publisher = {ACM},
  series = {RSWeb '12},
  title = {Leveraging Publication Metadata and Social Data into FolkRank for Scientific Publication Recommendation},
  url = {http://doi.acm.org/10.1145/2365934.2365937},
  year = 2012
}

@inproceedings{doerfel2012publication,
  abstract = {We present an analysis of the publication and citation networks of all previous editions of the three conferences most relevant to the FCA community: ICFCA, ICCS and CLA. Using data mining methods from FCA and graph analysis, we investigate patterns and communities among authors, we identify and visualize influential publications and authors, and we give a statistical summary of the conferences’ history.
},
  address = {Berlin/Heidelberg},
  author = {Doerfel, Stephan and Jäschke, Robert and Stumme, Gerd},
  booktitle = {ICFCA 2012},
  editor = {Domenach, F. and Ignatov, D.I. and Poelmans, J.},
  interhash = {f34f31e8dd1e07b1b0a5ab688f10084a},
  intrahash = {0ac1296af204a499490bf61a48d03e48},
  pages = {77--95},
  publisher = {Springer},
  series = {Lecture Notes in Artificial Intelligence},
  title = {Publication Analysis of the Formal Concept Analysis Community},
  url = {https://www.kde.cs.uni-kassel.de/pub/pdf/doerfel2012publication.pdf},
  volume = 7278,
  year = 2012
}

@inproceedings{atzmueller2011facetoface,
  author = {Atzmueller, Martin and Doerfel, Stephan and Hotho, Andreas and Mitzlaff, Folke and Stumme, Gerd},
  booktitle = {Working Notes of the LWA 2011 - Learning, Knowledge, Adaptation},
  interhash = {0b17cc97fd8ae45161a926da9363c4b2},
  intrahash = {84840e0e94320b5742df381f2ec033b7},
  title = {Face-to-Face Contacts during LWA 2010 - Communities, Roles, and Key Players},
  year = 2011
}

@inproceedings{atzmueller2011facetoface,
  author = {Atzmueller, Martin and Doerfel, Stephan and Hotho, Andreas and Mitzlaff, Folke and Stumme, Gerd},
  booktitle = {Proc. Workshop on Mining Ubiquitous and Social Environments (MUSE 2011) at ECML/PKDD 2011},
  interhash = {49e97def917e352ca21ab2e3eb7bd88a},
  intrahash = {1fe037ea2712b205c564243d67840059},
  title = {Face-to-Face Contacts during a Conference: Communities, Roles, and Key Players},
  year = 2011
}

@inproceedings{scholz2011resourceaware,
  author = {Scholz, Christoph and Doerfel, Stephan and Atzmueller, Martin and Hotho, Andreas and Stumme, Gerd},
  bibsource = {DBLP, http://dblp.uni-trier.de},
  booktitle = {ECML/PKDD (3)},
  crossref = {DBLP:conf/pkdd/2011-3},
  ee = {http://dx.doi.org/10.1007/978-3-642-23808-6_9},
  interhash = {d81c55cdcdf8ee331595bbb4d6fd51d6},
  intrahash = {d50c1d2d3edd0a41313cb25eebef0849},
  pages = {129-144},
  title = {Resource-Aware On-line RFID Localization Using Proximity Data},
  url = {http://dx.doi.org/10.1007/978-3-642-23808-6_9},
  year = 2011
}

@inproceedings{kartal2011privatsphren,
  abstract = {Aufgrund der mittlerweile unüberschaubaren Vielfalt von Anwendungsmöglichkeiten des Web 2.0, findet man fast zu jedem Lebensbereich eine passende Community im Netz. Dabei steigt auch die Anzahl der Bewertungsportale stetig und
betrifft längst nicht mehr nur die Bewertung von Waren, sondern erstreckt sich unterdessen auch auf Beurteilungen von Leistungen und Eigenschaften von zu bestimmten Berufsgruppen gehörenden Personen. Diese Entwicklung birgt die Gefahr, dass die
dadurch gewonnenen persönlichen Daten durchaus geeignet sind, wahrheitswidrig ein übermäßig positives oder übermäßig negatives Persönlichkeitsbild des Betroffenen zu konstruieren und dadurch sein Ansehen zu beeinflussen. Im Hinblick auf Fragen im
Zusammenhang mit dem Persönlichkeits- und Datenschutz soll der folgende Beitrag Maßstäbe an eine verfassungs- und datenschutzkonforme technische Gestaltung von Online-Bewertungsportalen aufzeigen.},
  author = {Kartal, Aliye and Doerfel, Stephan and Roßnagel, Alexander and Stumme, Gerd},
  booktitle = {Informatik 2011 - Informatik schafft Communities - Proceedings der 41. GI-Jahrestagung },
  editor = {Heiß, Hans-Ulrich and Pepper, Peter and Schlingloff, Holger and Schneider, Jörg},
  interhash = {cf589401116bfad4980467e68b67d173},
  intrahash = {25c89c0f9e4149da87e5212dd12481f0},
  month = {10},
  organization = {Gesellschaft für Informatik e.V. (GI)},
  pages = 412,
  publisher = {Bonner Köllen Verlag},
  series = {Lecture Notes in Informatics},
  title = {Privatsphären- und Datenschutz in Community-Plattformen: Gestaltung von Online-Bewertungsportalen},
  url = {http://www.informatik2011.de/541.html},
  vgwort = {32},
  volume = 192,
  year = 2011
}

@article{atzmueller2011enhancing,
  author = {Atzmueller, Martin and Benz, Dominik and Doerfel, Stephan and Hotho, Andreas and Jäschke, Robert and Macek, Bjoern Elmar and Mitzlaff, Folke and Scholz, Christoph and Stumme, Gerd},
  booktitle = {it - Information Technology},
  comment = {doi: 10.1524/itit.2011.0631},
  doi = {10.1524/itit.2011.0631},
  interhash = {e57bff1f73b74e6f1fe79e4b40956c35},
  intrahash = {1dc34c1620c45a9bbd548bb73f989aea},
  issn = {16112776},
  journal = {it - Information Technology},
  month = may,
  number = 3,
  pages = {101--107},
  publisher = {Oldenbourg Wissenschaftsverlag GmbH},
  title = {Enhancing Social Interactions at Conferences},
  url = {http://dx.doi.org/10.1524/itit.2011.0631},
  volume = 53,
  year = 2011
}

@inproceedings{doerfel2011contextbased,
  abstract = {In universal algebra and in lattice theory the notion of varieties is very prominent, since varieties describe the classes of all algebras (or of all lattices) modeling a given set of equations. While a comprehensive translation of that notion to a similar notion of varieties of complete lattices – and thus to Formal Concept Analysis – has not yet been accomplished, some characterizations of the doubly founded complete lattices of some special varieties (e.g. the variety of modular or that of distributive lattices) have been discovered. In this paper we use the well-known arrow relations to give a characterization of the formal contexts of doubly founded concept lattices in the variety that is generated by M 3 – the smallest modular, non-distributive lattice variety.},
  address = {Berlin / Heidelberg},
  affiliation = {Knowledge &amp; Data Engineering Group, Department of Mathematics and Computer Science, University of Kassel, Wilhelmshöher Allee 73, 34121 Kassel, Germany},
  author = {Doerfel, Stephan},
  booktitle = {Formal Concept Analysis},
  doi = {10.1007/978-3-642-20514-9_9},
  editor = {Valtchev, Petko and Jäschke, Robert},
  interhash = {05f9bbf79efdce60316e0dc25528ea1c},
  intrahash = {5cee560a10f3cb4ad3cb3726b6a18ff4},
  pages = {93-106},
  publisher = {Springer},
  series = {Lecture Notes in Computer Science},
  title = {A Context-Based Description of the Doubly Founded Concept Lattices in the Variety Generated by M_3},
  url = {http://dx.doi.org/10.1007/978-3-642-20514-9_9},
  vgwort = {23},
  volume = 6628,
  year = 2011
}

@inproceedings{doerfel2010scaffolding,
  abstract = {The scaffolding of a complete lattice L of finite length was introduced by Rudolf Wille in 1976 as a relative subsemilattice of L that can be constructed using subdirect decomposition. The lattice is uniquely defined by its scaffolding and can be reconstructed from it. Using bonds, we demonstrate how the scaffolding can be constructed from a given formal context and thereby extend the notion of the scaffolding to doubly founded lattices. Further, we explain the creation of a suitable graphical representation of the scaffolding from the context.},
  author = {Doerfel, Stephan},
  booktitle = {Concept Lattices and Their Applications 2010},
  editor = {Kryszkiewicz, Marzena and Obiedkov, Sergei},
  interhash = {b654c8f4b9c1604e0ec842a7db47a08b},
  intrahash = {2584354f8e496d5747eb1025478c31ec},
  month = {November},
  pages = {283-293},
  publisher = {CEUR-WS},
  title = {The Scaffolding of a Formal Context},
  url = {http://ceur-ws.org/Vol-672/paper25.pdf},
  vgwort = {18},
  volume = 672,
  year = 2010
}