ICWSM-16 Technical Program

The ICWSM-16 technical program will be held in the Maternusaal Room of Maternushaus, May 18-20.

Wednesday, May 18

09:00 - 09:15: Awards and Opening Remarks

Markus Strohmaier / Krishna Gummadi, General Chairs, ICWSM-16

09:15 - 10:30 : Keynote Address

Suresh Venkatasubramanian (University of Utah)

Algorithmic Fairness: From social good to mathematical framework

Machine learning has taken over our world, in more ways than we realize. You might get book recommendations, or an efficient route to your destination, or even a winning strategy for a game of Go. But you might also be admitted to college, granted a loan, or hired for a job based on algorithmically enhanced decision-making. We believe machines are neutral arbiters: cold, calculating entities that always make the right decision, that can see patterns that our human minds can't or won't. But are they? Or is decision-making-by-algorithm a way to amplify, extend and make inscrutable the biases and discrimination that is prevalent in society? To answer these questions, we need to go back — all the way to the original ideas of justice and fairness in society. We also need to go forward — towards a mathematical framework for talking about justice and fairness in machine learning. Dr. Venkatasubramanian will talk about the growing landscape of research in algorithmic fairness: how we can reason systematically about biases in algorithms, and how we can make our algorithms fair(er).

10:30 - 11:00 : Coffee Break

11:00 - 12:30: Session I : Biases and Inequalities

Power Imbalance and Rating Systems
Bogdan State, Bruno Abrahao, Karen S. Cook

"Will Check-in for Badges": Understanding Bias and Misbehavior on Location-Based Social Networks
Gang Wang, Sarita Y. Schoenebeck, Haitao Zheng, Ben Y. Zhao

Shirtless and Dangerous: Quantifying Linguistic Signals of Gender Bias in an Online Fiction Writing Community
Ethan Fast, Tina Vachovsky, Michael S. Bernstein

Twitter's Glass Ceiling: The Effect of Perceived Gender on Online Visibility
Shirin Nilizadeh, Anne Groggel, Peter Lista, Srijita Das, Yong-Yeol Ahn, Apu Kapadia, Fabio Rojas

Identifying Platform Effects in Social Media Data
Momin M. Malik, Jürgen Pfeffer

12:30 - 14:00 : Lunch Break

14:00 - 15:30 : Session II: Politics and News

When a Movement Becomes a Party: Computational Assessment of New Forms of Political Organization in Social Media
Pablo Aragón, Yana Volkovich, David Laniado, Andreas Kaltenbrunner

Changing Names in Online News Comments at the New York Times
Simranjit Singh Sachar, Nicholas Diakopoulos

Lost in Propagation? Unfolding News Cycles from the Source
Chenhao Tan, Adrien Friggeri, Lada A. Adamic

Journalists and Twitter: A Multidimensional Quantitative Description of Usage Patterns
Mossaab Bagdouri

User Migration in Online Social Networks: A Case Study on Reddit during a Period of Community Unrest
Edward Newell, David Jurgens, Haji Mohammad Saleem, Hardik Vala, Jad Sassine, Caitrin Armstrong, Derek Ruths

15:30 - 16:00: Coffee Break

16:00 - 18:00 : Session III: Recommendations and Popularity

Cross Social Media Recommendation
Xiaozhong Liu, Tian Xia, Yingying Yu, Chun Guo, Yizhou Sun

Aligning Popularity and Quality in Online Cultural Markets
Pascal Van Hentenryck, Andrés Abeliuk, Franco Berbeglia, Felipe Maldonado, Gerardo Berbeglia

Sequential Voting Promotes Collective Discovery in Social Recommendation Systems
L. Elisa Celis, Peter M. Krafft, Nathan Kobe

Power of Earned Advertising on Social Network Services: A Case Study of Friend Tagging on Facebook
Jaimie Y. Park, Yunkyu Sohn, Sue Moon

"Blissfully Happy" or "Ready to Fight": Varying Interpretations of Emoji
Hannah Miller, Jacob Thebault-Spieker, Shuo Chang, Isaac Johnson, Loren Terveen, Brent Hecht

Measuring the Efficiency of Charitable Giving with Content Analysis and Crowdsourcing
Ceren Budak, Justin M. Rao

Predictability of Popularity: Gaps between Prediction and Understanding
Benjamin Shulman, Amit Sharma, Dan Cosley

19:00 - 21:00 : ICWSM-16 Opening Reception

Chocolate Museum, Am Schokoladenmuseum, 50678, Cologne

(28 minute walk or 19 minute bus ride, 1,4 mile from GESIS and Maternushaus)

Thursday, May 19

09:00 - 10:00 : Keynote Address

Amir Goldberg (Stanford Graduate School of Business)

Decoding Culture from Digital Traces

Culture is one of the least understood concepts in the social sciences. We all know it exists, but disagree on how to define and measure it. In this talk, I will discuss how the web and online communication open a window into understanding and measuring culture in ways that were unimaginable until recently. In particular, I will focus on language-based algorithms drawn from organizational email communication that measure individual cultural fit, and can predict promotion, dismissal and voluntary turnover. This work improves significantly on existing methods for measuring cultural alignment between individuals and groups, and provides new insights into how culture operates and affects individual and group processes.

10:00 - 10:35 : Session IV: Best Paper Candidates

Who Did What: Editor Role Identification in Wikipedia - Honorable Mention
Diyi Yang, Aaron Halfaker, Robert Kraut, Eduard Hovy

Understanding Communities via Hashtag Engagement: A Clustering Based Approach
Orianna DeMasi, Douglas Mason, Jeff Ma

10:35 - 11:00 : Coffee Break

11:00 - 12:30 : Session V: Users, Opinions and Attitudes 1

Understanding Anti-Vaccination Attitudes in Social Media
Tanushree Mitra, Scott Counts, James W. Pennebaker

Emotions, Demographics and Sociability in Twitter Interactions
Kristina Lerman, Megha Arora, Luciano Gallegos, Ponnurangam Kumaraguru, David Garcia

On Unravelling Opinions of Issue Specific-Silent Users in Social Media
Wei Gong, Ee-Peng Lim, Feida Zhu, Pei Hua Cher

Are You Charlie or Ahmed? Cultural Pluralism in Charlie Hebdo Response on Twitter
Jisun An, Haewoon Kwak, Yelena Mejova, Sonia Alonso Saenz De Oger, Braulio Gomez Fortes

Discovering Response-Eliciting Factors in Social Question-Answering: A Reddit Inspired Study
Danish, Yogesh Dahiya, Partha Talukdar

12:30 - 14:00: Lunch Break

14:00 - 15:30: Session VI: Users, Opinions and Attitudes 2

The Status Gradient of Trends in Social Media
Rahmtin Rotabi, Jon Kleinberg

Your Age Is No Secret: Inferring Microbloggers' Ages via Content and Interaction Analysis
Jinxue Zhang, Xia Hu, Yanchao Zhang, Huan Liu

Analyzing Personality through Social Media Profile Picture Choice
Leqi Liu, Daniel Preotiuc-Pietro, Zahra Riahi Samani, Mohsen E. Moghaddam, Lyle Ungar

Predicting Perceived Brand Personality with Social Media
Anbang Xu, Haibin Liu, Liang Gou, Rama Akkiraju, Jalal Mahmud, Vibha Sinha, Yuheng Hu, Mu Qiao

What the Language You Tweet Says about Your Occupation
Tianran Hu, Haoyuan Xiao, Jiebo Luo, Thuy-vy Thi Nguyen

15:30 - 16:00: Coffee Break

16:00 - 18:00 : Session VII: Privacy, Networks and Diffusion

Tracking Secret-Keeping in Emails
Yla R. Tausczik, Cindy K. Chung, James W. Pennebaker

Distinguishing between Topical and Non-Topical Information Diffusion Mechanisms in Social Media
Przemyslaw A. Grabowicz, Niloy Ganguly, Krishna P. Gummadi

Investigating the Observability of Complex Contagion in Empirical Social Networks
Clay Fink, Aurora Schmidt, Vladimir Barash, John Kelly, Christopher Cameron, Michael Macy

Networks of Gratitude: Structures of Thanks and User Expectations in Workplace Appreciation Systems
Emma S. Spiro, J. Nathan Matias, Andrés Monroy-Hernández

Bad Apples Spoil the Fun: Quantifying Cheating Influence in Online Gaming
Xiang Zuo, Clayton Gandy, John Skovertz, Adriana Iamnitchi

TiDeH: Time-Dependent Hawkes Process for Predicting Retweet Dynamics
Ryota Kobayashi, Renaud Lambiotte

On the Behaviour of Deviant Communities in Online Social Networks
Mauro Coletto, Luca Maria Aiello, Claudio Lucchese, Fabrizio Silvestri

18:15 - 20:30 : ICWSM-16 Poster/Demo Session

Foyer, Maternushaus

Friday, May 20

09:00 - 10:00 : Keynote Address

Lise Getoor (University of California, Santa Cruz)

Scalable Collective Reasoning for Richly Structured Socio-Behavioral Data

Online data from weblogs and social media provide richly structured socio-behavioral data. However, using noisy and incomplete data from social media often requires inferring unobserved attributes of individuals and their relationships. And doing this correctly requires complex collective reasoning about dependencies among those individuals. In this talk, I will describe some common inference patterns needed for socio-behavioral networks including: collective classification (predicting missing labels for nodes), link prediction (predicting edges), and entity resolution (determining when two nodes refer to the same underlying entity). I will then describe in detail a highly scalable open-source probabilistic programming language being developed within my group to solve these challenges.

10:00 - 10:35 : Session VIII: Best Paper Candidates

Social Media Participation in an Activist Movement for Racial Equality - Best Paper
Munmun De Choudhury, Shagun Jhaver, Benjamin Sugar, Ingmar Weber

Mining Pro-ISIS Radicalisation Signals from Social Media Users
Matthew Rowe, Hassan Saif

10:35 - 11:00 : Coffee Break

11:00 - 12:30 : Session IX: Big Data and Well Being

Dynamic Data Capture from Social Media Streams: A Contextual Bandit Approach
Thibault Gisselbrecht, Sylvain Lamprier, Patrick Gallinari

Pub Crawling at Scale: Tapping Untappd to Explore Social Drinking
Martin J. Chorley, Luca Rossi, Gareth Tyson, Matthew J. Williams

Fetishizing Food in Digital Age: #foodporn around the World
Yelena Mejova, Sofiane Abbar, Hamed Haddadi

#PrayForDad: Learning the Semantics behind Why Social Media Users Disclose Health Information
Zhijun Yin, You Chen, Daniel Fabbri, Jimeng Sun, Bradley Malin

The Dynamics of Emotions in Online Interaction
David Garcia, Arvid Kappas, Dennis Küster and Frank Schweitzer

12:30 - 13:00: Lunch Break

13:00 - 14:00: Townhall Meeting

14:00 - 15:30 : Session X: Sentiment and Text Analysis

CrowdLens: Experimenting with Crowd-Powered Recommendation and Explanation
Shuo Chang, F. Maxwell Harper, Lingfei He, Loren G. Terveen

Sentiment-Based Topic Suggestion for Micro-Reviews
Ziyu Lu, Nikos Mamoulis, Evaggelia Pitoura, Panayiotis Tsaparas

Science, AskScience, and BadScience: On the Coexistence of Highly Related Communities
Jack Hessel, Chenhao Tan, Lillian Lee

TweetGrep: Weakly Supervised Joint Retrieval and Sentiment Analysis of Topical Tweets
Satarupa Guha, Tanmoy Chakraborty, Samik Datta, Mohit Kumar, Vasudeva Varma

Theme-Relevant Truth Discovery on Twitter: An Estimation Theoretic Approach
Dong Wang, Jermaine Marshall, Chao Huang

Message Impartiality in Social Media Discussions
Muhammad Bilal Zafar, Krishna P. Gummadi, Cristian Danescu-Niculescu-Mizil

15:45 - 16:00: Coffee Break

16:00 - 17:05 : Session XI: Places and Spaces

The Emotional and Chromatic Layers of Urban Smells
Daniele Quercia, Luca Maria Aiello, Rossano Schifanella

EigenTransitions with Hypothesis Testing: The Anatomy of Urban Mobility
Ke Zhang, Yu-Ru Lin, Konstantinos Pelechrinis

Space Collapse: Reinforcing, Reconfiguring and Enhancing Chinese Social Practices through WeChat
Yang Wang, Yao Li, Bryan Semaan, Jian Tang

17:05 - 17:20 : Closing Remarks

Markus Strohmaier / Krishna Gummadi, General Chairs, ICWSM-16