{"id":145,"date":"2016-03-02T11:58:18","date_gmt":"2016-03-02T10:58:18","guid":{"rendered":"https:\/\/www.kde.cs.uni-kassel.de\/?page_id=145"},"modified":"2019-03-04T16:57:06","modified_gmt":"2019-03-04T15:57:06","slug":"doerfel","status":"publish","type":"page","link":"https:\/\/www.kde.cs.uni-kassel.de\/en\/doerfel","title":{"rendered":"Dr. Stephan Doerfel"},"content":{"rendered":"\n<p><img loading=\"lazy\" decoding=\"async\" class=\"img-responsive alignright\" src=\"\/doerfel\/img\/doerfelBild.jpg\" alt=\"Stephan Doerfel\" width=\"200\" height=\"288\"><a href=\"http:\/\/www.uni-kassel.de\/\"><\/a><br>Hinweis: Stephan Doerfel ist seit dem 30.04.2016 nicht mehr im Fachgebiet besch\u00e4ftigt.<\/p>\n<p>Email: <a href=\"mailto:doerfel@cs.uni-kassel.de\"><u><span style=\"color: #0066cc;\">doerfel@cs.uni-kassel.de<\/span><\/u><\/a><\/p>\n<p id=\"social-networks\"><a class=\"icon\" href=\"https:\/\/scholar.google.com\/citations?user=F4UuNMcAAAAJ\"><img decoding=\"async\" src=\"\/doerfel\/img\/logo.google.scholar.svg\" alt=\"Google Scholar\"><\/a> <a class=\"icon\" href=\"http:\/\/www.bibsonomy.org\/cv\/user\/sdo\"><img decoding=\"async\" src=\"\/doerfel\/img\/logo.bibsonomy.svg\" alt=\"BibSonomy\"><\/a> <a class=\"icon\" href=\"http:\/\/www.linkedin.com\/in\/doerfel\"><img decoding=\"async\" src=\"\/doerfel\/img\/logo.linkedin.svg\" alt=\"LinkedIn\"><\/a><\/p>\n<div class=\"col-md-6\"><\/div>\n<h2 id=\"research\">about me<\/h2>\n<p>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.<br>I am also a senior developer of the blue social bookmark and publication sharing system <a href=\"http:\/\/www.bibsonomy.org\/\"><u><span style=\"color: #0066cc;\">BibSonomy. <\/span><\/u><\/a><\/p>\n<h2 id=\"publications\">publications<\/h2>\n<p><a href=\"\/doerfel\/publications\"><u><span style=\"color: #0066cc;\">Full list<\/span><\/u><\/a> of my publications and posters.<\/p>\n<h3>top publications<\/h3>\n<div>\n<ol class=\"publist\">\n<li>\n<div>\n<div class=\"csl-bib-body\">\n<div class=\"csl-entry\">Zoller, D., Doerfel, S., J\u00e4schke, R., Stumme, G., Hotho, A.: <span class=\"citeproc-title\">Posted, visited, exported: Altmetrics in the social tagging system BibSonomy.<\/span> <span class=\"citeproc-container-title\">Journal of Informetrics .<\/span> <span class=\"citeproc-volume\">10,<\/span> <span class=\"citeproc-page\">732 &#8211; 749<\/span> (2016).<\/div>\n<\/div>\n<\/div>\n<ul class=\"list-inline\">\n<li><a class=\"bibsonomy\" href=\"http:\/\/bibsonomy.org\/bibtex\/285ead278b2d7057d97906fc20b7199a1\/sdo\">BibSonomy<\/a><\/li>\n<li><a class=\"download\" rel=\"download-85ead278b2d7057d97906fc20b7199a1sdo\" href=\"https:\/\/www.kde.cs.uni-kassel.de\/pub\/pdf\/zoller2016posted.pdf\">PDF<\/a><\/li>\n<li><a class=\"puburl\" href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S1751157715300936\">URL<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div>\n<div class=\"csl-bib-body\">\n<div class=\"csl-entry\">Doerfel, S., J\u00e4schke, R., Stumme, G.: <span class=\"citeproc-title\">The Role of Cores in Recommender Benchmarking for Social Bookmarking Systems.<\/span> <span class=\"citeproc-container-title\">ACM Transactions on Intelligent Systems and Technology.<\/span> <span class=\"citeproc-volume\">7,<\/span> <span class=\"citeproc-page\">40:1-40:33<\/span> (2016).<\/div>\n<\/div>\n<\/div>\n<ul class=\"list-inline\">\n<li><a class=\"bibsonomy\" href=\"http:\/\/bibsonomy.org\/bibtex\/2bd08732fd4924af3b4add3f0a98b3682\/sdo\">BibSonomy<\/a><\/li>\n<li><a class=\"download\" rel=\"download-bd08732fd4924af3b4add3f0a98b3682sdo\" href=\"https:\/\/www.kde.cs.uni-kassel.de\/pub\/pdf\/doerfel2016cores.pdf\">PDF<\/a><\/li>\n<li><a class=\"puburl\" href=\"http:\/\/doi.acm.org\/10.1145\/2700485\">URL<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div>\n<div class=\"csl-bib-body\">\n<div class=\"csl-entry\">Doerfel, S., Zoller, D., Singer, P., Niebler, T., Hotho, A., Strohmaier, M.: <span class=\"citeproc-title\">What Users Actually do in a Social Tagging System: A Study of User Behavior in BibSonomy.<\/span> <span class=\"citeproc-container-title\">ACM Transactions on the Web.<\/span> <span class=\"citeproc-volume\">10,<\/span> <span class=\"citeproc-page\">14:1&#8211;14:32<\/span> (2016).<\/div>\n<\/div>\n<\/div>\n<ul class=\"list-inline\">\n<li><a class=\"bibsonomy\" href=\"http:\/\/bibsonomy.org\/bibtex\/295dafc17ef731ee387c6ea52edc01615\/sdo\">BibSonomy<\/a><\/li>\n<li><a class=\"download\" rel=\"download-95dafc17ef731ee387c6ea52edc01615sdo\" href=\"https:\/\/www.kde.cs.uni-kassel.de\/pub\/pdf\/doerfel2016users.pdf\">PDF<\/a><\/li>\n<li><a class=\"puburl\" href=\"http:\/\/dl.acm.org\/citation.cfm?id=2896821\">URL<\/a><\/li>\n<\/ul>\n<a class=\"puburl\" href=\"http:\/\/dx.doi.org\/10.1145\/2567948.2577301\"><u><span style=\"color: #0066cc;\"><\/span><\/u><\/a><\/li>\n<li>\n<div>\n<div class=\"csl-bib-body\">\n<div class=\"csl-entry\">Doerfel, S., J\u00e4schke, R.: <span class=\"citeproc-title\">An Analysis of Tag-Recommender Evaluation Procedures.<\/span> <span class=\"citeproc-container-title\">Proceedings of the 7th ACM conference on Recommender systems (RecSys 2013)<\/span>. <span class=\"citeproc-page\">pp. <span class=\"citeproc-page\">343-346<\/span><\/span>. <span class=\"citeproc-publisher\">ACM, Hong Kong, China<\/span> (2013).<\/div>\n<\/div>\n<\/div>\n<ul class=\"list-inline\">\n<li><a class=\"bibsonomy\" href=\"http:\/\/bibsonomy.org\/bibtex\/2a99609c92ca818a046b6ead92c7c5d5a\/sdo\">BibSonomy<\/a><\/li>\n<li><a class=\"download\" href=\"\/pub\/pdf\/doerfel2013analysis.pdf\" rel=\"download-a99609c92ca818a046b6ead92c7c5d5asdo\">PDF<\/a><\/li>\n<li><a class=\"puburl\" href=\"http:\/\/doi.acm.org\/10.1145\/2507157.2507222\">URL<\/a><\/li>\n<\/ul>\n<div class=\"toogleableFields\"><\/div>\n<\/li>\n<li>\n<div>\n<div class=\"csl-bib-body\">\n<div class=\"csl-entry\">Doerfel, S., Hotho, A., Kartal-Aydemir, A., Ro\u00dfnagel, A., Stumme, G.: <span class=\"citeproc-title\">Informationelle Selbstbestimmung Im Web 2.0 &#8211; Chancen Und Risiken Sozialer Verschlagwortungssysteme.<\/span> <span class=\"citeproc-publisher\">Vieweg + Teubner Verlag<\/span> (2013).<\/div>\n<\/div>\n<\/div>\n<ul class=\"list-inline\">\n<li><a class=\"bibsonomy\" href=\"http:\/\/bibsonomy.org\/bibtex\/2b7e6aad4cb12edde5a17b11cd4ef9974\/sdo\">BibSonomy<\/a><\/li>\n<li><a class=\"download\" rel=\"download-b7e6aad4cb12edde5a17b11cd4ef9974sdo\" href=\"https:\/\/www.kde.cs.uni-kassel.de\/pub\/pdf\/doerfel2013informationelle.pdf\">PDF<\/a><\/li>\n<li><a class=\"puburl\" href=\"http:\/\/www.springer.com\/us\/book\/9783642380556\">URL<\/a><\/li>\n<\/ul>\n<br>\n<div class=\"toogleableFields\"><\/div>\n<\/li>\n<\/ol>\n<\/div>\n<h2 id=\"projects\">projects<\/h2>\n<p>These are the projects I have mainly worked on. Through my research, I have further been involved with the projects <a href=\"http:\/\/www.uni-kassel.de\/eecs\/en\/iteg\/venus\/venus.html\"><u><span style=\"color: #0066cc;\">Venus<\/span><\/u><\/a>, <a href=\"http:\/\/www.everyaware.eu\/\"><u><span style=\"color: #0066cc;\">EveryAware<\/span><\/u><\/a>, and <a href=\"http:\/\/www.is.informatik.uni-wuerzburg.de\/dmir_forschungsgruppe\/projects\/\"><u><span style=\"color: #0066cc;\">PoSTs<\/span><\/u><\/a>.<\/p><\/br>\n<ul id=\"projectList\">\n<li>\n<div class=\"project row\">\n<div class=\"col-md-2\"><img loading=\"lazy\" decoding=\"async\" class=\"img-responsive project-logo alignleft\" src=\"\/doerfel\/img\/puma_logo.png\" alt=\"\" width=\"148\" height=\"157\"><\/div>\n<div class=\"col-md-10\">\n<h4>PUMA<\/h4>\n<p>In the DFG funded project &#8220;Akademisches Publikationsmanagement&#8221; (PUMA), we used and extended the BibSonomy software to create a new web portal that is run locally at an institution (library, university, etc.) and that integrates there with the existing eco system by connecting to the local open access repository, the publication discovery service or the eLearning platform.<\/p>\n<ul class=\"list-inline\">\n<li><a href=\"http:\/\/www.academic-puma.de\/\"><u><span style=\"color: #0066cc;\">About<\/span><\/u><\/a><\/li>\n<li><a href=\"http:\/\/gepris.dfg.de\/gepris\/projekt\/226801949\"><u><span style=\"color: #0066cc;\">DFG<\/span><\/u><\/a><\/li>\n<li><a href=\"https:\/\/bitbucket.org\/bibsonomy\/puma\"><u><span style=\"color: #0066cc;\">Open Source Repo<\/span><\/u><\/a><\/li>\n<li><a href=\"https:\/\/twitter.com\/academicpuma\"><u><span style=\"color: #0066cc;\">Twitter<\/span><\/u><\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"project row\">\n<div class=\"col-md-2\"><img decoding=\"async\" class=\"img-responsive project-logo alignleft\" src=\"\/doerfel\/img\/info20.jpg\" alt=\"\"><\/div>\n<div class=\"col-md-10\">\n<h4>Info 2.0<\/h4>\n<p>In the DFG funded Project &#8220;Informationelle Selbstbestimmung im Web 2.0&#8221; (Info 2.0), we analyzed opportunities and risks in Web 2.0 systems, regarding issues of privacy. A second aspect that was investigated were consequences of user-generated ratings and reviews of products and particularly of scholarly publications. The project&#8217;s results have been published as a book.<\/p>\n<ul class=\"list-inline\">\n<li><a href=\"http:\/\/www.uni-kassel.de\/fb07\/fileadmin\/datas\/fb07\/5-Institute\/IWR\/Ro%C3%9Fnagel\/projekte_abgeschlossen\/projekt_Info20.pdf\"><u><span style=\"color: #0066cc;\">About<\/span><\/u><\/a><\/li>\n<li><a href=\"http:\/\/www.springer.com\/us\/book\/9783642380556\"><u><span style=\"color: #0066cc;\">Book<\/span><\/u><\/a><\/li>\n<li><a href=\"http:\/\/gepris.dfg.de\/gepris\/projekt\/81671824\"><u><span style=\"color: #0066cc;\">DFG<\/span><\/u><\/a><\/li>\n<li><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"project row\">\n<div class=\"col-md-2\"><img decoding=\"async\" class=\"img-responsive project-logo alignleft\" src=\"\/doerfel\/img\/bibsonomy.png\" alt=\"\"><\/div>\n<div class=\"col-md-10\">\n<h4>BibSonomy<\/h4>\n<p>BibSonomy is a scholarly social bookmarking system where researchers manage their collections of publications and web pages. BibSonomy is an open source project, continously developed by researchers in Kassel, W\u00fcrzburg, and Hannover. Functioning as a test bed for recommendation and ranking algorithms, as well as through the publicly available datasets, containing traces of user behavior on the Web, BibSonomy has been the subject of various scientific studies.<\/p>\n<ul class=\"list-inline\">\n<li><a href=\"http:\/\/bibsonomy.bitbucket.org\/\"><u><span style=\"color: #0066cc;\">About<\/span><\/u><\/a><\/li>\n<li><a href=\"http:\/\/www.bibsonomy.org\/\"><u><span style=\"color: #0066cc;\">BibSonomy<\/span><\/u><\/a><\/li>\n<li><a href=\"http:\/\/blog.bibsonomy.org\/\"><u><span style=\"color: #0066cc;\">Blog<\/span><\/u><\/a><\/li>\n<li><a href=\"https:\/\/bitbucket.org\/bibsonomy\/bibsonomy\/wiki\/Home\"><u><span style=\"color: #0066cc;\">Open Source Repo<\/span><\/u><\/a><\/li>\n<li><a href=\"https:\/\/twitter.com\/BibSonomyCrew\"><u><span style=\"color: #0066cc;\">Twitter<\/span><\/u><\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/li>\n<\/ul>\n<h2 id=\"activities\">activities<\/h2>\n<p><a href=\"\/doerfel\/activities\"><u><span style=\"color: #0066cc;\">Full list<\/span><\/u><\/a> of my reviewing and teaching activities.<\/p>\n<h3>recent activities<\/h3>\n<ul>\n<li>Subreviewer: <a href=\"http:\/\/ijcai-16.org\/\"><u><span style=\"color: #0066cc;\">25th International Joint Conference on Artificial Intelligence (IJCAI 2016)<\/span><\/u><\/a>, July 9 &#8211; 15, 2016, New York City, USA.<\/li>\n<li>PC Member: <a href=\"http:\/\/www.taosciences.it\/mod\/\"><u><span style=\"color: #0066cc;\">2nd International Workshop on Machine learning, Optimization and Big Data (MOD 2016)<\/span><\/u><\/a>, August 26 &#8211; 29, 2016, Volterra, Italy.<\/li>\n<li>PC Member: <a href=\"http:\/\/cla2016.hse.ru\/\"><u><span style=\"color: #0066cc;\">13th International Conference on Concept Lattices and their Applications (CLA 2016)<\/span><\/u><\/a>, July 11 &#8211; 15, 2016, Moscow, Russia.<\/li>\n<li>PC Member: <a href=\"\/ws\/msm2016\/\"><u><span style=\"color: #0066cc;\">7th International Workshop on Modeling Social Media (MSM 2016) &#8211; Behavioral Analytics in Social Media, Big Data and the Web<\/span><\/u><\/a>, May 12th, 2016, Montreal, Canada.<\/li>\n<li>Journal Reviewer: <a href=\"http:\/\/www.computer.org\/web\/tsc\"><u><span style=\"color: #0066cc;\">IEEE Transactions on Services Computing<\/span><\/u><\/a> (2015)<\/li>\n<li>PC Member: <a href=\"http:\/\/lwa2015.wi2.uni-trier.de\/\"><u><span style=\"color: #0066cc;\">Workshop &#8220;Knowledge Discovery, Data Mining, Maschinelles Lernen 2015&#8221; der Fachgruppe KDML (KDML 2015)<\/span><\/u><\/a>, October 7 &#8211; 9, 2015, Trier, Germany.<\/li>\n<li>PC Member: <a href=\"http:\/\/www.ecmlpkdd2015.org\/\"><u><span style=\"color: #0066cc;\"> European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML\/PKDD 2015)<\/span><\/u><\/a>, September 7 &#8211; 11, 2015, Porto, Portugal.<\/li>\n<li>PC Member: <a href=\"http:\/\/www.matap.uma.es\/icfca2015\/index.html\"><u><span style=\"color: #0066cc;\">13th International Conference on Formal Concept Analysis (ICFCA 2015)<\/span><\/u><\/a>, June 23 &#8211; 26, 2015, Nerja (M\u00e1laga), Spain.<\/li>\n<li>Subreviewer: <a href=\"http:\/\/iswc2015.semanticweb.org\/\"><u><span style=\"color: #0066cc;\">14th International Semantic Web Conference (ISWC 2015)<\/span><\/u><\/a>, October 11 &#8211; 15, 2015, Bethlehem, Pennsylvania.<\/li>\n<\/ul>\n<h2 id=\"teaching\">teaching<\/h2>\n<dl>\n<dt>Sommersemester 2015<\/dt>\n<dd>\n<ul>\n<li><a href=\"https:\/\/moodle.uni-kassel.de\/moodle\/course\/view.php?id=1429\"><u><span style=\"color: #0066cc;\">Einf\u00fchrung in das Schreiben wissenschaftlicher Texte (im Bereich Informatik)<\/span><\/u><\/a><\/li>\n<\/ul>\n<\/dd>\n<\/dl>\n<p>Information on previous courses can be found <a href=\"http:\/\/www.bibsonomy.org\/user\/sdo\/teaching+myown\"><u><span style=\"color: #0066cc;\"> here at BibSonomy<\/span><\/u><\/a>. In each term we offer several <a href=\"\/lehre\/ws2011-12\/projekt\"><u><span style=\"color: #0066cc;\">student projects<\/span><\/u><\/a> in the context of the web 2.0 and of knowledge discovery.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hinweis: Stephan Doerfel ist seit dem 30.04.2016 nicht mehr im Fachgebiet besch\u00e4ftigt. Email: doerfel@cs.uni-kassel.de about me My research at Kassel University includes the investigation of scientometrics and webometrics, correlations thereof and their possible applications for<a class=\"moretag\" href=\"https:\/\/www.kde.cs.uni-kassel.de\/en\/doerfel\"> Read more&hellip;<\/a><\/p>\n","protected":false},"author":18,"featured_media":0,"parent":0,"menu_order":52,"comment_status":"closed","ping_status":"closed","template":"employee_template.php","meta":{"footnotes":""},"class_list":["post-145","page","type-page","status-publish","hentry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"en","enabled_languages":["de","en"],"languages":{"de":{"title":true,"content":true,"excerpt":false},"en":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/www.kde.cs.uni-kassel.de\/en\/wp-json\/wp\/v2\/pages\/145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kde.cs.uni-kassel.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.kde.cs.uni-kassel.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.kde.cs.uni-kassel.de\/en\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kde.cs.uni-kassel.de\/en\/wp-json\/wp\/v2\/comments?post=145"}],"version-history":[{"count":43,"href":"https:\/\/www.kde.cs.uni-kassel.de\/en\/wp-json\/wp\/v2\/pages\/145\/revisions"}],"predecessor-version":[{"id":8528,"href":"https:\/\/www.kde.cs.uni-kassel.de\/en\/wp-json\/wp\/v2\/pages\/145\/revisions\/8528"}],"wp:attachment":[{"href":"https:\/\/www.kde.cs.uni-kassel.de\/en\/wp-json\/wp\/v2\/media?parent=145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}