finding their way into everyday life, there is a rapidly growing amount of user
generated content yielding explicit and implicit network structures. We
consider social activities and phenomena as proxies for user relatedness. Such
activities are represented in so-called social interaction networks or evidence
networks, with different degrees of explicitness. We focus on evidence networks
containing relations on users, which are represented by connections between
individual nodes. Explicit interaction networks are then created by specific
user actions, for example, when building a friend network. On the other hand,
more implicit networks capture user traces or evidences of user actions as
observed in Web portals, blogs, resource sharing systems, and many other social
services. These implicit networks can be applied for a broad range of analysis
methods instead of using expensive gold-standard information.
In this paper, we analyze different properties of a set of networks in social
media. We show that there are dependencies and correlations between the
networks. These allow for drawing reciprocal conclusions concerning pairs of
networks, based on the assessment of structural correlations and ranking
interchangeability. Additionally, we show how these inter-network correlations
can be used for assessing the results of structural analysis techniques, e.g.,
community mining methods. ER - TY - JOUR AU - Mitzlaff, Folke AU - Atzmueller, Martin AU - Benz, Dominik AU - Hotho, Andreas AU - Stumme, Gerd T1 - User-Relatedness and Community Structure in Social Interaction Networks JO - CoRR/abs PY - 2013/ VL - 1309.3888 IS - SP - EP - UR - M3 - KW - 2013 KW - data KW - iteg KW - itegpub KW - l3s KW - mining KW - myown KW - social KW - ubiquitous KW - venus KW - web L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Atzmueller, Martin AU - Becker, Martin AU - Kibanov, Mark AU - Scholz, Christoph AU - Doerfel, Stephan AU - Hotho, Andreas AU - Macek, Bjoern-Elmar AU - Mitzlaff, Folke AU - Mueller, Juergen AU - Stumme, Gerd T1 - Ubicon and its Applications for Ubiquitous Social Computing JO - New Review of Hypermedia and Multimedia PY - 2014/03 VL - 1 IS - 20 SP - 53 EP - 77 UR - http://dx.doi.org/10.1080/13614568.2013.873488 M3 - 10.1080/13614568.2013.873488 KW - 2014 KW - applications KW - computing KW - myown KW - social KW - ubicon KW - ubiquitous L1 - SN - N1 - N1 - AB - The combination of ubiquitous and social computing is an emerging
research area which integrates different but complementary methods,
techniques and tools. In this paper, we focus on the Ubicon platform,
its applications, and a large spectrum of analysis results.
Ubicon provides an extensible framework for building and hosting applications
targeting both ubiquitous and social environments. We summarize the
architecture and exemplify its implementation using four real-world
applications built on top of Ubicon. In addition, we discuss several
scientific experiments in the context of these applications in order
to give a better picture of the potential of the framework, and discuss
analysis results using several real-world data sets collected utilizing
Ubicon. ER - TY - CONF AU - Atzmueller, Martin AU - Hilgenberg, Katy A2 - T1 - Towards Capturing Social Interactions with SDCF: An Extensible Framework for Mobile Sensing and Ubiquitous Data Collection T2 - Proc. 4th International Workshop on Modeling Social Media (MSM 2013), Hypertext 2013 PB - ACM Press CY - New York, NY, USA PY - 2013/ M2 - VL - IS - SP - EP - UR - M3 - KW - 2013 KW - collection KW - data KW - interaction KW - iteg KW - itegpub KW - l3s KW - mobile KW - sensing KW - social KW - venus L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Mitzlaff, Folke AU - Atzmueller, Martin AU - Hotho, Andreas AU - Stumme, Gerd T1 - The social distributional hypothesis: a pragmatic proxy for homophily in online social networks JO - Social Network Analysis and Mining PY - 2014/ VL - 4 IS - 1 SP - EP - UR - http://dx.doi.org/10.1007/s13278-014-0216-2 M3 - 10.1007/s13278-014-0216-2 KW - 2014 KW - distributional KW - hypothesis KW - itegpub KW - myown KW - sitc KW - social L1 - SN - N1 - The social distributional hypothesis: a pragmatic proxy for homophily in online social networks - Springer N1 - AB - Applications of the Social Web are ubiquitous and have become an integral part of everyday life: Users make friends, for example, with the help of online social networks, share thoughts via Twitter, or collaboratively write articles in Wikipedia. All such interactions leave digital traces; thus, users participate in the creation of heterogeneous, distributed, collaborative data collections. In linguistics, the ER - TY - CHAP AU - Atzmueller, Martin A2 - Chin, Alvin A2 - Zhang, Daqing T1 - Social Behavior in Mobile Social Networks: Characterizing Links, Roles and Communities T2 - Mobile Social Networking: An Innovative Approach PB - Springer Verlag CY - Heidelberg, Germany PY - 2013/ VL - IS - SP - EP - UR - M3 - KW - 2013 KW - analysis KW - iteg KW - itegpub KW - l3s KW - media KW - network KW - social KW - venus L1 - SN - N1 - N1 - AB - ER - TY - CHAP AU - Mitzlaff, Folke AU - Atzmueller, Martin AU - Stumme, Gerd AU - Hotho, Andreas A2 - Ghoshal, Gourab A2 - Poncela-Casasnovas, Julia A2 - Tolksdorf, Robert T1 - Semantics of User Interaction in Social Media T2 - Complex Networks IV PB - Springer Verlag CY - Heidelberg, Germany PY - 2013/ VL - 476 IS - SP - EP - UR - M3 - 10.1007/978-3-642-36844-8_2 KW - 2013 KW - interaction KW - iteg KW - itegpub KW - l3s KW - media KW - myown KW - social KW - user KW - venus L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Schulz, Thomas AU - Skistims, Hendrik AU - Zirfas, Julia AU - Atzmueller, Martin AU - Scholz, Christoph T1 - Rechtliche Ausgestaltung sozialer Konferenzplattformen JO - ZD PY - 2013/ VL - 2 IS - SP - 60 EP - 65 UR - M3 - KW - 2013 KW - analysis KW - conferator KW - iteg KW - itegpub KW - l3s KW - media KW - social KW - venus L1 - SN - N1 - N1 - AB - ER - TY - BOOK AU - A2 - Roth-Berghofer, Thomas A2 - Oussena, Samia A2 - Atzmueller, Martin T1 - Proceedings of the 2013 International Smart University Workshop (SmartU 2013) PB - CONTEXT 2013 AD - Annecy, France PY - 2013/ VL - IS - SP - EP - UR - M3 - KW - 2013 KW - iteg KW - itegpub KW - l3s KW - mining KW - smart KW - social KW - ubiquitous KW - university KW - workshop L1 - SN - N1 - N1 - AB - ER - TY - GEN AU - A2 - Chin, Alvin A2 - Atzmueller, Martin A2 - Helic, Denis T1 - Proceedings MSM 2012: Workshop on Modeling Social Media -- Collective Intelligence in Social Media JO - PB - ACM Press AD - New York, NY, USA PY - 2012/ VL - IS - SP - EP - UR - M3 - KW - 2012 KW - collective KW - data KW - intelligence KW - itegpub KW - media KW - mining KW - modeling KW - msm KW - proceedings KW - social KW - ubiquitous KW - venus L1 - N1 - N1 - AB - ER - TY - CONF AU - Mitzlaff, Folke AU - Atzmueller, Martin AU - Stumme, Gerd AU - Hotho, Andreas A2 - T1 - On the Semantics of User Interaction in Social Media (Extended Abstract, Resubmission) T2 - Proc. LWA 2013 (KDML Special Track) PB - University of Bamberg CY - Bamberg, Germany PY - 2011/ M2 - VL - IS - SP - EP - UR - M3 - KW - 2013 KW - data KW - iteg KW - itegpub KW - l3s KW - mining KW - myown KW - social KW - ubiquitous KW - venus KW - web L1 - SN - N1 - N1 - AB - ER - TY - CONF AU - Kibanov, Mark AU - Atzmueller, Martin AU - Scholz, Christoph AU - Stumme, Gerd A2 - T1 - On the Evolution of Contacts and Communities in Networks of Face-to-Face Proximity T2 - Proc. IEEE CPSCom 2013 PB - IEEE Computer Society CY - Boston, MA, USA PY - 2013/ M2 - VL - IS - SP - EP - UR - M3 - KW - 2013 KW - community KW - conferator KW - face-to-face KW - iteg KW - itegpub KW - l3s KW - mining KW - myown KW - sna KW - social KW - venus L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Atzmueller, Martin T1 - Mining Social Media JO - Informatik Spektrum PY - 2012/ VL - 35 IS - 2 SP - 132 EP - 135 UR - M3 - KW - 2012 KW - analysis KW - community KW - data KW - itegpub KW - media KW - sentiment KW - social KW - socialnetworks L1 - SN - N1 - N1 - AB - ER - TY - CONF AU - Scholz, Christoph AU - Atzmueller, Martin AU - Kibanov, Mark AU - Stumme, Gerd A2 - T1 - How Do People Link? Analysis of Contact Structures in Human Face-to-Face Proximity Networks T2 - ASONAM PB - CY - PY - 2013/ M2 - VL - IS - SP - EP - UR - M3 - KW - 2013 KW - analysis KW - iteg KW - itegpub KW - l3s KW - link KW - myown KW - network KW - prediction KW - social L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Atzmueller, Martin AU - Lemmerich, Florian T1 - Exploratory Pattern Mining on Social Media using Geo-References and Social Tagging Information JO - International Journal of Web Science (Special Issue on Social Web Search and Mining) PY - 2013/ VL - 2 IS - 1/2 SP - EP - UR - M3 - KW - 2013 KW - analysis KW - exploratory KW - iteg KW - itegpub KW - l3s KW - media KW - mining KW - pattern KW - social KW - venus L1 - SN - N1 - N1 - AB - ER - TY - CONF AU - Kibanov, Mark AU - Atzmueller, Martin AU - Scholz, Christoph AU - Stumme, Gerd A2 - T1 - Evolution of Contacts and Communities in Networks of Face-to-Face Proximity (Extended Abstract, Resubmission) T2 - Proc. LWA 2013 (KDML Special Track) PB - University of Bamberg CY - Bamberg, Germany PY - 2013/ M2 - VL - IS - SP - EP - UR - M3 - KW - 2013 KW - conferator KW - data KW - iteg KW - itegpub KW - l3s KW - mining KW - myown KW - social KW - ubiquitous KW - venus L1 - SN - N1 - N1 - AB - ER - TY - CHAP AU - Lemmerich, Florian AU - Atzmueller, Martin A2 - T1 - Describing Locations using Tags and Images: Explorative Pattern Mining in Social Media T2 - Modeling and Mining Ubiquitous Social Media PB - Springer Verlag CY - Heidelberg, Germany PY - 2012/ VL - 7472 IS - SP - EP - UR - http://www.kde.cs.uni-kassel.de/atzmueller/paper/lemmerich-explorative-pattern-mining-socia-media-lnai-2012.pdf M3 - KW - 2012 KW - collective KW - data KW - describing KW - explorative KW - images KW - intelligence KW - itegpub KW - locations KW - media KW - mining KW - social KW - tags KW - ubiquitous KW - venus L1 - SN - N1 - N1 - AB - ER - TY - JOUR AU - Landia, Nikolas AU - Doerfel, Stephan AU - Jäschke, Robert AU - Anand, Sarabjot Singh AU - Hotho, Andreas AU - Griffiths, Nathan T1 - Deeper Into the Folksonomy Graph: FolkRank Adaptations and Extensions for Improved Tag Recommendations JO - cs.IR PY - 2013/ VL - 1310.1498 IS - SP - EP - UR - http://arxiv.org/abs/1310.1498 M3 - KW - 2013 KW - bookmarking KW - collaborative KW - folkrank KW - folksonomy KW - graph KW - iteg KW - itegpub KW - l3s KW - recommender KW - social KW - tagging L1 - SN - N1 - N1 - AB - The information contained in social tagging systems is often modelled as a graph of connections between users, items and tags. Recommendation algorithms such as FolkRank, have the potential to leverage complex relationships in the data, corresponding to multiple hops in the graph. We present an in-depth analysis and evaluation of graph models for social tagging data and propose novel adaptations and extensions of FolkRank to improve tag recommendations. We highlight implicit assumptions made by the widely used folksonomy model, and propose an alternative and more accurate graph-representation of the data. Our extensions of FolkRank address the new item problem by incorporating content data into the algorithm, and significantly improve prediction results on unpruned datasets. Our adaptations address issues in the iterative weight spreading calculation that potentially hinder FolkRank's ability to leverage the deep graph as an information source. Moreover, we evaluate the benefit of considering each deeper level of the graph, and present important insights regarding the characteristics of social tagging data in general. Our results suggest that the base assumption made by conventional weight propagation methods, that closeness in the graph always implies a positive relationship, does not hold for the social tagging domain. ER - TY - GEN AU - Atzmueller, Martin AU - Kibanov, Mark AU - Scholz, Christoph AU - Stumme, Gerd A2 - T1 - Conferator - a Social System for Conference and Contact Management JO - PB - INFORMATIK 2013 AD - PY - 2013/ VL - IS - SP - EP - UR - M3 - KW - 2013 KW - conferator KW - data KW - iteg KW - itegpub KW - l3s KW - mining KW - myown KW - social KW - ubiquitous KW - venus L1 - N1 - N1 - AB - ER - TY - CONF AU - Doerfel, Stephan AU - Jäschke, Robert A2 - T1 - An analysis of tag-recommender evaluation procedures T2 - Proceedings of the 7th ACM conference on Recommender systems PB - ACM CY - New York, NY, USA PY - 2013/ M2 - VL - IS - SP - 343 EP - 346 UR - https://www.kde.cs.uni-kassel.de/pub/pdf/doerfel2013analysis.pdf M3 - 10.1145/2507157.2507222 KW - 2013 KW - bibsonomy KW - bookmarking KW - collaborative KW - core KW - evaluation KW - folkrank KW - folksonomy KW - graph KW - iteg KW - itegpub KW - l3s KW - recommender KW - social KW - tagging L1 - SN - 978-1-4503-2409-0 N1 - N1 - AB - Since the rise of collaborative tagging systems on the web, the tag recommendation task -- suggesting suitable tags to users of such systems while they add resources to their collection -- has been tackled. However, the (offline) evaluation of tag recommendation algorithms usually suffers from difficulties like the sparseness of the data or the cold start problem for new resources or users. Previous studies therefore often used so-called post-cores (specific subsets of the original datasets) for their experiments. In this paper, we conduct a large-scale experiment in which we analyze different tag recommendation algorithms on different cores of three real-world datasets. We show, that a recommender's performance depends on the particular core and explore correlations between performances on different cores. ER -