Social Informatics [electronic resource] : 4th International Conference, SocInfo 2012, Lausanne, Switzerland, December 5-7, 2012. Proceedings / edited by Karl Aberer, Andreas Flache, Wander Jager, Ling Liu, Jie Tang, Christophe Guéret.

A System for Web Widget Discovery Using Semantic Distance between User Intent and Social Tags -- An Automated Multiscale Map of Conversations: Mothers and Matters -- How Influential Are You: Detecting Influential Bloggers in a Blogging Community -- A Simulation Model Using Transaction Cost Economics to Analyze the Impact of Social Media on Online Shopping -- Predicting Group Evolution in the Social Network -- Interpolating between Random Walks and Shortest Paths: A Path Functional Approach -- Dynamic Targeting in an Online Social Medium -- Connecting with Active People Matters: The Influence of an Online Community on Physical Activity Behavior -- Detecting Overlapping Communities in Location-Based Social Networks -- CrowdLang: A Programming Language for the Systematic Exploration of Human Computation Systems -- Experiments in Cross-Lingual Sentiment Analysis in Discussion Forums -- Quality Assessment of User Comments on Mobile Platforms Considering Channel of Activation and Platform Design -- A Method Based on Congestion Game Theory for Determining Electoral Tendencies -- A Model to Represent Human Social Relationships in Social Network Graphs -- C4PS - Helping Facebookers Manage Their Privacy Settings -- Dynamic "Participative Rules" in Serious Games, New Ways for Evaluation? -- Mobile Phones, Family and Personal Relationships: The Case of Indonesian Micro-entrepreneurs -- An Analysis of Topical Proximity in the Twitter Social Graph -- A Foresight Support System to Manage Knowledge on Information Society Evolution -- How Many Answers Are Enough? Optimal Number of Answers for Q&A Sites -- Analysis and Support of Lifestyle via Emotions Using Social Media -- A Computational Analysis of Joint Decision Making Processes -- Collaboratively Constructing a VDL-Based Icon System for Knowledge Tagging -- A Multi-dimensional and Event-Based Model for Trust Computation in the Social Web -- On Recommending Hashtags in Twitter Networks -- A Framework for the Design and Synthesis of Coordinated Social Systems -- Swayed by Friends or by the Crowd? -- Are Twitter Users Equal in Predicting Elections? A Study of User Groups in Predicting 2012 U.S. Republican Presidential Primaries.-Web Page Recommendation Based on Semantic Web Usage Mining -- Scalable Analysis for Large Social Networks: The Data-Aware Mean-Field Approach -- A Survey of Recommender Systems in Twitter -- Multi-view Content-Based User Recommendation Scheme for Following Users in Twitter -- Spam Fighting in Social Tagging Systems -- The Multidimensional Study of Viral Campaigns as Branching Processes -- Models of Social Groups in Blogosphere Based on Information about Comment Addressees and Sentiments -- Dark Retweets: Investigating Non-conventional Retweeting Patterns.-Studying Paths of Participation in Viral Diffusion Process -- Paradox of Proximity - Trust and Provenance within the Context of Social Networks and Policy -- Namelings: Discover Given Name Relatedness Based on Data from the SocialWeb -- SocialTrends: A Web Application for Monitoring and Visualizing Users in Social Media -- Demonstration of Dynamic Targeting in an Online Social Medium -- Navigating between Chaos and Bureaucracy: Backgrounding Trust in Open-Content Communities.-.