Sunbelt XXXI International Network for Social Network ... - INSNA

Structure And Consistency: Assessment Of Social Bookmarking CommunitiesMitzlaff, Folke; Atzmueller, Martin; Benz, Dominik; Hotho, Andreas; Stumme, GerdOnline Social NetworksCommunity Detection, Evaluation, Folksonomies, Online NetworksTHURS.PM1The growing amount of user generated content in the “Web 2.0” entails an increasing need for personalized access to the wealth of information available inorder to prevent the user from getting “lost in data”. Community detection and user recommendation techniques, for example, allow for presenting onlycontent which was provided by “relevant” users. But how to judge whether a group of users forms a relevant community is still difficult, withoutapplying gold‐standard data which is rarely available. Focussing on the evaluation of user communities, this paper provides the basis for an appropriateevaluation framework. It tackles the problem by analyzing so‐called evidence networks that encompass evidences for user relationships in social bookmarkingsystems. Our findings suggest that these networks exhibit common community structure. Furthermore, standard evaluation metrics are applied for assessingthe contained community structure, giving new insights concerning the networks as well as the metrics. The provided results motivate an approach forassessing communities using such networks.Structures Of Collaboration Among Movie TechniciansVernet, AntoineCollaboration, coordination and cooperationCulture, Collaboration, Large‐scale Networks, TeamSAT.AM2The aims of this study is to better understand the process of reproduction of work teams over time. The study describes relationships between the core teamof technicians (cinematographer, editor, set designer, costume designer), producers and directors. It aims at understanding the influence of recurringcollaborations on career outcomes. Using descriptive statistics on large networks and extraction of subnetworks from this network of collaboration (using theinformation collected during an extensive qualitative research on the careers of movie technicians conducted in France and the US for my PhD, to assure thatthe subnetworks are meaningful) we study how careers unfold in time and how enduring work teams are constituted. This allows us to investigate the impactof recurring relationships on the duration of one's career and on one's success.