Fifth International AAAI Conference on Weblogs and Social Media
17-21 July 2011, Barcelona, Spain


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ICWSM-11 Preliminary Conference Program

Time 17 Jul 18 Jul 19 Jul 20 Jul 21 Jul
8:00 - 9:00   Opening Remarks: General Chais, ICWSM-11 [Starting at 8:30 AM]    

2 Full-Day Workshops [FOSW11|SMW11] + 1 Half-Day Workshop [SISOM11]

9:00 - 10:00 Tutorials [SA1|SA2] Opening Keynote: Manuel Castells Industrial Keynote: Jimmy Lin Opening Keynote: Sinan Aral
10:00 - 10:30      
10:30 - 12:10 25 Technical Paper Oral Presentations over 3 days
12:10 - 13:00   Hosted Lunch Hosted Lunch    
13:00 - 13:30 Tutorial [SP1]        
13:30 - 14:15 Invited Talk: Foster Provost Invited Talk: Joel Seligstein Invited Talk: Duncan Watts

Cont. Full Day Workshops + Data Challenge Workshop

14:15 - 15:30 28 Technical Paper Poster Presentations over 2 days  
16:00 - 17:15   25 Technical Paper Oral Presentations over 3 days
17:30 - 18:00   Panel Discussion: Is Social Media Making News Generation and Consumption Better?      
18:00 - 19:00   Poster/Demo Reception    
20:00 - 22:00   IJCAI-11/ICWSM-11 Opening Reception      
  17 Jul 18 Jul 19 Jul 20 Jul 21 Jul

Sunday, July 17: ICWSM-11 Tutorials Day

9:00 AM - 12:00 PM
Tutorial SA1: How to use Mechanical Turk for Behavioral Research
Winter Mason and Siddharth Suri

Tutorial SA2: Text Mining from User Generated Content
Lyle Ungar and Ronen Feldman

1:00 - 4:00 PM
Tutorial SP1: Exploratory Network Analysis with Gephi
Sebastien Heymann and Julian Bilcke

Monday, July 18

8:30 - 9:00 AM
Opening Remarks: James G. Shanahan and Nicolas Nicolov, General Chairs, ICWSM-11

9:00 – 10:00 AM
Keynote Address: Manuel Castells (Director of the Internet Interdisciplinary Institute, Open University of Catalonia (UOC), Spain) Social Media and Wiki-Revolutions: The New Frontier of Political Change

10:00 – 10:30 AM
Coffee Break

10:30 AM – 12:10 PM
Session: Location, Emergency, and Health

134: Natural Language Processing to the Rescue? Extracting “Situational Awareness” Tweets during Mass Emergency
Sudha Verma, Sarah Vieweg, William J. Corvey, Leysia Palen, James H. Martin, Martha Palmer, Aaron Schram, Kenneth M. Anderson

212: Socio-Spatial Properties of Online Location-Based Social Networks
Salvatore Scellato, Renaud Lambiotte, Anastasios Noulas, Cecilia Mascolo

282: Exploring Millions of Footprints in Location Sharing Services
Zhiyuan Cheng, James Caverlee, Kyumin Lee, Daniel Z. Sui

133: You Are What You Tweet: Analyzing Twitter for Public Health
Michael J. Paul, Mark Dredze

12:10 – 1:30 PM
Lunch Break

1:30 – 2:15 PM
Invited Talk: Foster Provost (New York University)
Social Targeting for Privacy-Friendly On-line Advertising

2:15 – 2:30 PM
Full Paper Poster Spotlight Session (1 minute each)

2:30 – 3:30 PM
Full Paper Poster Session

Bias and Politics
75: More Voices than Ever? Quantifying Media Bias in Networks
Yu-Ru Lin, James P. Bagrow, David Lazer

187: Classifying the Political Leaning of News Articles and Users from User Votes
Daniel Xiaodan Zhou, Paul Resnick, Qiaozhu Mei

59: Detecting and Tracking Political Abuse in Social Media
Jacob Ratkiewicz, Michael D. Conover, Mark Meiss, Bruno Gonçalves, Alessandro Flammini, Filippo Menczer

Information Propagation
352: Insights into Internet Memes
Christian Bauckhage

64: Memes Online: Extracted, Subtracted, Injected, and Recollected
Matthew P. Simmons, Lada A. Adamic, Eytan Adar

16: Timing Tweets to Increase Effectiveness of Information Campaigns
Onkar Dabeer, Prachi Mehendale, Aditya Karnik, Atul Saroop

142: Modelling Action Cascades in Social Networks
Kushal Dave, Rushi Bhatt, Vasudeva Varma

Social Filtering
49: Social Lens: Personalization around User Defined Collections for Filtering Enterprise Message Streams
Elizabeth M. Daly, Michael Muller, David R. Millen, Liang Gou

221: Just a Click Away: Social Search and Metadata in Predicting File Discovery
N. Sadat Shami, Michael Muller, David R. Millen

78: Rating Friends without Making Enemies
Lada A. Adamic, Debra Lauterbach, Chun-Yuen Teng, Mark S. Ackerman

Textual and Network Analysis
333: Latent Set Models for Two-Mode Network Data
Christopher DuBois, James Foulds, Padhraic Smyth

79: Generate Adjective Sentiment Dictionary for Social Media Sentiment Analysis Using Constrained Nonnegative Matrix Factorization
Wei Peng, Dae Hoon Park

154: Event Summarization Using Tweets
Deepayan Chakrabarti, Kunal Punera

172: Scalable Event-Based Clustering of Social Media Via Record Linkage Techniques
Timo Reuter, Philipp Cimiano, Lucas Drumond, Krisztian Buza, Lars Schmidt-Thieme

3:30 – 4:00 PM
Coffee Break

4:00 – 5:15 PM
Session: Diffusion

143 What Stops Social Epidemics?
Greg Ver Steeg, Rumi Ghosh, Kristina Lerman

136: Differential Adaptive Diffusion: Understanding Diversity and Learning Whom to Trust in Viral Marketing
Hossam Sharara, William Rand, Lise Getoor

66: Participation Maximization Based on Social Influence in Online Discussion Forums
Tao Sun, Wei Chen, Zhenming Liu, Yajun Wang, Xiaorui Sun, Ming Zhang, Chin-Yew Lin

5:30 - 7:00 PM
Invited Panel: Is Social Media Making News Generation and Consumption Better?
Moderator: Sihem Amer-Yahia, Principal Research Scientist at QCRI
Panelists: Marcus Mabry (The International Herald Tribune and The New York Times), Catherine Quayle (, Krishna Gummadi, (MPI), Mor Naaman (Rutgers University), Jimmy Lin (Twitter), and Gilad Lotan (SocialFlow)

8:00 – 10:00 PM
ICWSM-11 / IJCAI-11 Joint Opening Reception
Palau de la Música

Tuesday, July 19

9:00 – 10:00 AM
Industrial Keynote Speaker: Jimmy Lin (Twitter and The iSchool - College of Information Studies, University of Maryland)
Twitter and Data Science

10:00 – 10:30 AM
Coffee Break

10:30 AM – 12:10 PM
Session: Politics

58: Political Polarization on Twitter
Michael D. Conover, Jacob Ratkiewicz, Matthew Francisco, Bruno Gonçalves, Alessandro Flammini, Filippo Menczer

46: The Party Is Over Here: Structure and Content in the 2010 Election
Avishay Livne, Matthew P. Simmons, Eytan Adar, Lada A. Adamic

70: The Prevalence of Political Discourse in Non-Political Blogs
Sean A. Munson, Paul Resnick

25: Media landscape in Twitter: A world of new conventions and political diversity
Jisun An, Meeyoung Cha, Krishna P. Gummadi, Jon Crowcroft

12:10 – 1:30 PM
Lunch Break

1:30 – 2:15 PM
Invited Talk: Joel Seligstein (Facebook)
Trends in Facebook Messages

2:15 – 2:30 PM
Full Paper Poster Spotlight Session (1 minute each)

2:30 – 3:30 PM
Full Paper Poster Session

Content Consumption
267: Taking It All In? Visual Attention in Microblog Consumption
Scott Counts, Kristie Fisher

87: Why Do People Retweet? Anti-Homophily Wins the Day!
Sofus A. Macskassy, Matthew Michelson

48: How Does Social Capital Affect Retweets?
Raquel Recuero, Ricardo Araujo, Gabriela Zago

Content Diversity
253: Find Me the Right Content! Diversity-Based Sampling of Social Media Spaces for Topic-Centric Search
Munmun De Choudhury, Scott Counts, Mary Czerwinski

179: Diversity Measurement of Recommender Systems under Different User Choice Models
Z. Szlávik, W. Kowalczyk, Martijn C. Schut

123: Exploiting User Interest on Social Media for Aggregating Diverse Data and Predicting Interest
Nozomi Nori, Danushka Bollegala, Mitsuru Ishizuka

Structural Analysis of Interactions
47: Identifying Representative Textual Sources in Blog Networks
Karen Wade, Derek Greene, Conrad Lee, Daniel Archambault, Pádraig Cunningham

203: Two Paths of Glory Structural Positions and Trajectories of Websites within their Topical Territory
Dominique Cardon, Guilhem Fouetillou, Camille Roth

102: Reconstruction of Threaded Conversations in Online Discussion Forums
Erik Aumayr, Jeffrey Chan, Conor Hayes

277: Seven Months with the Devils: A Long-Term Study of Content Polluters on Twitter
Kyumin Lee, Brian David Eoff, James Caverlee

User Sourcing
165: An Assessment of Intrinsic and Extrinsic Motivation on Task Performance in Crowdsourcing Markets
Jakob Rogstadius, Vassilis Kostakos, Aniket Kittur, Boris Smus, Jim Laredo, Maja Vukovic

239: Culture Matters: A Survey Study of Social Q&A Behavior
Jiang Yang, Meredith Ringel Morris, Jaime Teevan, Lada A. Adamic, Mark S. Ackerman

71: The Effect of Mobile Platforms on Twitter Content Generation
Mathieu Perreault, Derek Ruths

307: Location3: How Users Share and Respond to Location-Based Data on Social Networking Sites
Jonathan Chang, Eric Sun

3:30 – 4:00 PM
Coffee Break

4:00 – 5:15 PM
Session: Natural Language Processing

271: Extracting Meta Statements from the Blogosphere
Filipe Mesquita, Denilson Barbosa

43: Searching Twitter: Separating the Tweet from the Chaff
Jonathan Hurlock, Max L. Wilson

98: Event Detection in Twitter
Jianshu Weng, Bu-Sung Lee

6:00 - 8:00 PM
ICWSM-11 Poster/Demo Session

Wednesday, July 20

9:00 – 10:00 AM
Keynote Address: Sinan Aral (NYU, Stern School of Business and MIT)
Content and Causality in Influence Networks

10:00 – 10:30 AM
Coffee Break

10:30 AM – 12:10 PM
Session: Interactions

243: What’s in a @name? How Name Value Biases Judgment of Microblog Authors
Aditya Pal, Scott Counts

266: Dimensions of Self-Expression in Facebook Status Updates
Adam D. I. Kramer, Cindy K. Chung

128: Center of Attention: How Facebook Users Allocate Attention across Friends
Lars Backstrom, Eytan Bakshy, Jon Kleinberg, Thomas M. Lento, Itamar Rosenn

204: Escaping Information Poverty through Internet Newsgroups
Laura Hasler, Ian Ruthven

12:10 – 1:30 PM
Lunch Break

1:30 – 2:15 PM
Invited Talk: Duncan Watts (Yahoo! Research)
The Virtual Lab

2:15 – 3:55 PM
Session: Collaboration and Participation

231: Task Specialization in Social Production Communities: The Case of Geographic Volunteer Work
Mikhil Masli, Reid Priedhorsky, Loren Terveen

33: When the Wikipedians Talk: Network and Tree Structure of Wikipedia Discussion Pages
David Laniado, Riccardo Tasso, Yana Volkovich, Andreas Kaltenbrunner

113: Technology-Mediated Citizen Science Participation: A Motivational Model
Oded Nov, Ofer Arazy, David Anderson

262: 4chan and /b/: An Analysis of Anonymity and Ephemerality in a Large Online Community
Michael S. Bernstein, Andrés Monroy-Hernández, Drew Harry, Paul André, Katrina Panovich, Greg Vargas

3:55 – 4:15 PM
Coffee Break

4:15 – 5:30 PM
Session: User Classification

295: A Machine Learning Approach to Twitter User Classification
Marco Pennacchiotti, Ana-Maria Popescu

109: Trust Amongst Rogues? A Hypergraph Approach for Comparing Clandestine Trust Networks in MMOGs
Muhammad Aurangzeb Ahmad, Brian Keegan, Dmitri Williams, Jaideep Srivastava, Noshir Contractor

330: Can the Ambiance of a Place be Determined by the User Profiles of the People Who Visit It?
Lindsay T. Graham, Samuel D. Gosling

Thursday, July 21

ICWSM-11 Workshop Program 8:00 – 12:00
Social Innovation and Social Media (SISOM-11)
Organizers: Ricard Ruiz De Querol, Fundació Barcelona Media, Spain; Fausto Giunchiglia, University of Trento, Italy; Imma Tubella i Casadevall, Universitat Oberta de Catalunya, Spain; Mario Diani, Universitat Pompeu Fabra, Spain

8:00 AM – 5:00 PM
Social Mobile Web Workshop (SMW-11)
Organizers: Karen Church, Telefonica Research, Spain; Josep M. Pujol, Telefonica Research, Spain; Barry Smyth, University College Dublin, Ireland; Noshir Contractor, Northwestern University, USA

8:00 AM – 5:00 PM
The Future of the Social Web (FOSW-11)
Organizers: Alejandro Jaimes, Yahoo! Research, Spain; Carlos Castillo, Yahoo! Research, Spain; Ricardo Baeza-Yates, Yahoo! Research, Spain; Sandra Gonzalez-Bailon, University of Oxford, UK

1:00 – 5:00 PM
Data Challenge Workshop
Cochairs: Ian Soboroff, NIST and Niels Kasch, UMBC