WWW '11 Companion Table of Contents

Message from the Chair of IW3C2
Mary Ellen Zurko (IBM Software Group)

Message from the General Chairs
S. Sadagopan (IIIT Bangalore)
Arun Kumar (IBM Research-India)
Krithi Ramamritham (IIT Bombay)
P. Ravindra (Infosys E & R)

WWW 2011 Program Chairs' Welcome
Elisa Bertino (Purdue University)
Ravi Kumar (Yahoo! Research)

PhD Symposium Welcome
Vasudeva Varma (IIIT Hyderabad)
Xiaofang Zhou (University of Queensland)

WWW 2011 Conference Organization

WWW 2011 Papers, Posters & Demo Program Committee

WWW 2011 Additional Reviewers

WWW 2011 Sponsors, Supporters, Hosts & Organizers 

WWW 2011 Author Index

Poster Presentations

Toward Optimal Vaccination Strategies for Probabilistic Models (Page 1)
Zeinab Abbassi (Columbia University)
Hoda Heidari (Sharif University of Technology)

Timestamp-Based Cache Invalidation for Search Engines (Page 3)
Sadiye Alici (Bilkent University)
Ismail Sengor Altingovde (Bilkent University)
Rifat Ozcan (Bilkent University)
B. Barla Cambazoglu (Yahoo! Research)
Özgür Ulusoy (Bilkent University)

Towards Automatic Quality Assurance in Wikipedia (Page 5)
Maik Anderka (Bauhaus-Universität Weimar)
Benno Stein (Bauhaus-Universität Weimar)
Nedim Lipka (Bauhaus-Universität Weimar)

Measuring the Effectiveness of Display Advertising: A Time Series Approach (Page 7)
Joel Barajas (University of California, Santa Cruz)
Ram Akella (University of California, Santa Cruz)
Marius Holtan (AOL Research)
Jaimie Kwon (AOL Research))
Brad Null (AOL Research)

A Middleware for Securing Mobile Mashups (Page 9)
Florent Batard (University of Nice Sophia Antipolis)
Karima Boudaoud (University of Nice Sophia Antipolis)
Michel Riveill (University of Nice Sophia Antipolis)

Language Independent Identification of Parallel Sentences Using Wikipedia (Page 11)
Rohit G. Bharadwaj (International Institute of Information Technology, Hyderabad)
Vasudeva Varma (International Institute of Information Technology, Hyderabad)

From Actors, Politicians, to CEOs: Domain Adaptation of Relational Extractors Using a Latent Relational Mapping (Page 13)
Danushka Bollegala (The University of Tokyo)
Yutaka Matsuo (The University of Tokyo)
Mitsuru Ishizuka (The University of Tokyo)

Recommendations for the Long Tail by Term-Query Graph (Page 15)
Francesco Bonchi (Yahoo! Research)
Raffaele Perego (ISTI-CNR)
Fabrizio Silvestri (ISTI-CNR)
Hossein Vahabi (IMT)
Rossano Venturini (ISTI-CNR)

Efficient Diversification of Search Results Using Query Logs (Page 17)
Gabriele Capannini (ISTI-CNR)
Franco Maria Nardini (ISTI-CNR)
Raffaele Perego (ISTI-CNR)
Fabrizio Silvestri (ISTI-CNR)

EntityTagger: Automatically Tagging Entities with Descriptive Phrases (Page 19)
Kaushik Chakrabarti (Microsoft Research)
Surajit Chaudhuri (Microsoft Research)
Tao Cheng (Microsoft Research)
Dong Xin (Microsoft Research)

Web-Scale Entity-Relation Search Architecture (Page 21)
Soumen Chakrabarti (IIT Bombay)
Devshree Sane (IIT Bombay)
Ganesh Ramakrishnan (IIT Bombay)

Survivability-Oriented Self-Tuning of Web Systems (Page 23)
Bihuan Chen (Fudan University)
Xin Peng (Fudan University)
Yijun Yu (The Open University)
Wenyun Zhao (Fudan University)

Learning Facial Attributes by Crowdsourcing in Social Media (Page 25)
Yan-Ying Chen (National Taiwan University)
Winston H. Hsu (National Taiwan University)
Hong-Yuan Mark Liao (Academia Sinica)

Generating Summaries for Ontology Search (Page 27)
Gong Cheng (Nanjing University)
Weiyi Ge (Nanjing University)
Yuzhong Qu (Nanjing University)

Enhancing Web Search with Entity Intent (Page 29)
Na Dai (Lehigh University)
Xiaoguang Qi (Lehigh University)
Brian D. Davison (Lehigh University)

Query Completion without Query Logs for Song Search (Page 31)
Nitin Dua (Indian Institute of Technology)
Kanika Gupta (Microsoft Research Lab India)
Monojit Choudhury (Microsoft Research Lab India)
Kalika Bali (Microsoft Research Lab India)

OntoWiki Mobile - Knowledge Management in Your Pocket (Page 33)
Timofey Ermilov (University of Leipzig)
Norman Heino (University of Leipzig)
Sören Auer (University of Leipzig)

HyLiEn: A Hybrid Approach to General List Extraction on the Web (Page 35)
Fabio Fumarola (Università degli Studi di Bari)
Tim Weninger (University of Illinois at Urbana-Champaign)
Rick Barber (University of Illinois at Urbana-Champaign)
Donato Malerba (Università degli Studi di Bari)
Jiawei Han (University of Illinois at Urbana-Champaign)

WonderWhat: Real-Time Event Determination from Photos (Page 37)
Mingyan Gao (University of California, Irvine)
Xian-Sheng Hua (Microsoft Research, Asia)
Ramesh Jain (University of California, Irvine)

Identifying Overlapping Communities in Folksonomies or Tripartite Hypergraphs (Page 39)
Saptarshi Ghosh (Indian Institute of Technology Kharagpur)
Pushkar Kane (Indian Institute of Technology Kharagpur)
Niloy Ganguly (Indian Institute of Technology Kharagpur)

Spammers' Networks Within Online Social Networks: A Case-Study on Twitter (Page 41)
Saptarshi Ghosh (Indian Institute of Technology Kharagpur)
Gautam Korlam (Indian Institute of Technology Kharagpur)
Niloy Ganguly (Indian Institute of Technology Kharagpur)

Networked Hierarchies for Web Directories (Page 43)
Nazli Goharian (Georgetown University)
Saket S. R. Mengle (Dataxu Inc.)

A Study on the Impact of Product Images on User Clicks for Online Shopping (Page 45)
Anjan Goswami (eBay Inc.)
Naren Chittar (eBay Inc.)
Chung H. Sung (eBay Inc.)

CELF++: Optimizing the Greedy Algorithm for Influence Maximization in Social Networks (Page 47)
Amit Goyal (University of British Columbia)
Wei Lu (University of British Columbia)
Laks V. S. Lakshmanan (University of British Columbia)

Rolling Boles, Optimal XML Structure Integrity for Updating Operations (Page 49)
Sebastian Graf (University of Konstanz)
Sebastian Belle (University of Konstanz)
Marcel Waldvogel (University of Konstanz)

SmartInt: Using Mined Attribute Dependencies to Integrate Fragmented Web Databases (Page 51)
Ravi Gummadi (Arizona State University)
Anupam Khulbe (Arizona State University)
Aravind Kalavagattu (Arizona State University)
Sanil Salvi (Arizona State University)
Subbarao Kambhampati (Arizona State University)

Trust Analysis with Clustering (Page 53)
Manish Gupta (University of Illinois at Urbana-Champaign)
Yizhou Sun (University of Illinois at Urbana-Champaign)
Jiawei Han (University of Illinois at Urbana-Champaign)

Automatic Sanitization of Social Network Data to Prevent Inference Attacks (Page 55)
Raymond Heatherly (The University of Texas at Dallas)
Murat Kantarcioglu (The University of Texas at Dallas)

Predicting Popular Messages in Twitter (Page 57)
Liangjie Hong (Lehigh University)
Ovidiu Dan (Lehigh University)
Brian D. Davison (Lehigh University)

Automatically Generating Labels Based on Unified Click Model (Page 59)
Guichun Hua (Tsinghua University)
Min Zhang (Tsinghua University)
Yiqun Liu (Tsinghua University)
Shaoping Ma (Tsinghua University)
Liyun Ru (Tsinghua University)

Allocating Inverted Index into Flash Memory for Search Engines (Page 61)
Bojun Huang (Microsoft Research Asia)
Zenglin Xia (Microsoft Research Asia)

Domain-Independent Entity Extraction from Web Search Query Logs (Page 63)
Alpa Jain (Yahoo!)
Marco Pennacchiotti (Yahoo!)

Ranking in Context-Aware Recommender Systems (Page 65)
Minsuk Kahng (Seoul National University)
Sangkeun Lee (Seoul National University)
Sang-goo Lee (Seoul National University)

Ranking Related Entities for Web Search Queries (Page 67)
Changsung Kang (Yahoo! Labs)
Srinivas Vadrevu (Yahoo! Labs)
Ruiqiang Zhang (Yahoo! Labs)
Roelof van Zwol (Yahoo! Labs)
Lluis Garcia Pueyo (Yahoo! Labs)
Nicolas Torzec (Yahoo! Labs)
Jianzhang He (Yahoo! Labs)
Yi Chang (Yahoo! Labs)

GeoVisualRank: A Ranking Method of Geotagged Images Considering Visual Similarity and Geo-Location Proximity (Page 69)
Hidetoshi Kawakubo (The University of Electro-Communications, Tokyo)
Keiji Yanai (The University of Electro-Communications, Tokyo)

Anytime Algorithm for QoS Web Service Composition (Page 71)
Hyunyoung Kil (Korea Advanced Institute of Science and Technology)
Wonhong Nam (Konkuk University)

Smart News Feeds for Social Networks Using Scalable Joint Latent Factor Models (Page 73)
Himabindu Lakkaraju (IBM Research - India)
Angshu Rai (IBM Research - India)
Srujana Merugu (IBM Research - India)

Finding Influential Mediators in Social Networks (Page 75)
Cheng-Te Li (National Taiwan University)
Shou-De Lin (National Taiwan University)
Man-Kwan Shan (National Chengchi University)

Hypergraph-Based Inductive Learning for Generating Implicit Key Phrases (Page 77)
Decong Li (Peking University)
Sujian Li (Peking University)

Open and Decentralized Access Across Location-Based Services (Page 79)
Yiming Liu (University of California, Berkeley)
Rui Yang (The Chinese University of Hong Kong)
Erik Wilde (University of California, Berkeley)

Personalized Search on Flickr Based on Searcher's Preference Prediction (Page 81)
Dongyuan Lu (Institute of Automation, Chinese Academy of Sciences)
Qiudan Li (Institute of Automation, Chinese Academy of Sciences)

A Classification Based Framework for Concept Summarization (Page 83)
Dhruv Mahajan (Yahoo Labs)
S. Sundararajan (Yahoo Labs)
Subhajit Sanyal (Yahoo Labs)
Amit Madaan (Yahoo Labs)

A Feature-Pair-Based Associative Classification Approach to Look-Alike Modeling for Conversion-Oriented User-Targeting in Tail Campaigns (Page 85)
Ashish Mangalampalli (IIIT)
Adwait Ratnaparkhi (33Across Inc.)
Andrew O. Hatch (Yahoo! Labs)
Abraham Bagherjeiran (Yahoo! Labs)
Rajesh Parekh (Groupon Inc.)
Vikram Pudi (IIIT)

Casting a Web of Trust Over Wikipedia: An Interaction-Based Approach (Page 87)
Silviu Maniu (Télécom ParisTech - LTCI)
Talel Abdessalem (Télécom ParisTech - LTCI)
Bogdan Cautis (Télécom ParisTech - LTCI)

Mobile Topigraphy: Large-Scale Tag Cloud Visualization for Mobiles (Page 89)
Tatsushi Matsubayashi (NTT Corporation)
Katsuhiko Ishiguro (NTT Corporation)

Unsupervised Query Segmentation Using Only Query Logs (Page 91)
Nikita Mishra (Indian Institute of Technology Kharagpur)
Rishiraj Saha Roy (Indian Institute of Technology Kharagpur)
Niloy Ganguly (Indian Institute of Technology Kharagpur)
Srivatsan Laxman (Microsoft Research India)
Monojit Choudhury (Microsoft Research India)

Detecting Group Review Spam (Page 93)
Arjun Mukherjee (University of Illinois at Chicago)
Bing Liu (University of Illinois at Chicago)
Junhui Wang (University of Illinois at Chicago)
Natalie Glance (Google Inc.)
Nitin Jindal (Google Inc.)

A Self-Organizing Document Map Algorithm for Large Scale Hyperlinked Data Inspired by Neuronal Migration (Page 95)
Kotaro Nakayama (The University of Tokyo)
Yutaka Matsuo (The University of Tokyo)

Collaborative Classification Over P2P Networks (Page 97)
Odysseas Papapetrou (L3S Research Center, University of Hannover)
Wolf Siberski (L3S Research Center, University of Hannover)
Stefan Siersdorfer (L3S Research Center, University of Hannover)

Generalized Fact-Finding (Page 99)
Jeff Pasternack (University of Illinois)
Dan Roth (University of Illinois)

Investigating Topic Models for Social Media User Recommendation (Page 101)
Marco Pennacchiotti (Yahoo! Labs)
Siva Gurumurthy (Yahoo! Labs)

On Using the Real-Time Web for News Recommendation & Discovery (Page 103)
Owen Phelan (University College Dublin)
Kevin McCarthy (University College Dublin)
Mike Bennett (University College Dublin)
Barry Smyth (University College Dublin)

Extracting Events and Event Descriptions from Twitter (Page 105)
Ana-Maria Popescu (Yahoo! Labs)
Marco Pennacchiotti (Yahoo! Labs)
Deepa Arun Paranjpe (Yahoo! Labs)

Understanding the Functions of Business Accounts on Twitter (Page 107)
Ana-Maria Popescu (Yahoo! Labs)
Alpa Jain (Yahoo! Labs)

A Framework for Evaluating Network Measures for Functional Importance (Page 109)
Tieyun Qian (Wuhan University)
Qing Li (City University of Hong Kong)
Jaideep Srivastava (University of Minnesota, Twin Cities)

Comparative Study of Clustering Techniques for Short Text Documents (Page 111)
Aniket Rangrej (IIT Madras)
Sayali Kulkarni (consultant)
Ashish V. Tendulkar (IIT Madras)

Influence and Passivity in Social Media (Page 113)
Daniel M. Romero (Cornell University)
Wojciech Galuba (École Polytechnique Fédérale de Lausanne)
Sitaram Asur (HP Labs)
Bernardo A. Huberman (HP Labs)

Web Information Extraction Using Markov Logic Networks (Page 115)
Sandeepkumar Satpal (Microsoft)
Sahely Bhadra (CSA, Indian Institute of Science)
S. Sundararajan (Yahoo! Labs)
Rajeev Rastogi (Yahoo! Labs)
Prithviraj Sen (Yahoo! Labs)

Towards Identifying Arguments in Wikipedia Pages (Page 117)
Hoda Sepehri Rad (University of Alberta)
Denilson Barbosa (University of Alberta)

How to Choose Combinations in a Join of Search Results (Page 119)
Mirit Shalem (Technion)
Yaron Kanza (Technion)

REACTOR: A Framework for Semantic Relation Extraction and Tagging Over Enterprise Data (Page 121)
Wei Shen (Tsinghua University)
Jianyong Wang (Tsinghua University)
Ping Luo (HP Labs China)
Min Wang (HP Labs China)
Conglei Yao (HP Labs China)

Harnessing the Wisdom of Crowds: Video Event Detection Based on Synchronous Comments (Page 123)
Xingtian Shi (The University of Tokyo)
Zhenglu Yang (The University of Tokyo)
Masashi Toyoda (The University of Tokyo)
Masaru Kitsuregawa (The University of Tokyo)

ReadAlong: Reading Articles and Comments Together (Page 125)
Dyut Kumar Sil (IISc)
Srinivasan H. Sengamedu (Yahoo! Labs)
Chiranjib Bhattacharyya (IISc)

Effective Summarization of Large Collections of Personal Photos (Page 127)
Pinaki Sinha (University of California, Irvine)
Sharad Mehrotra (University of California, Irvine)
Ramesh Jain (University of California, Irvine)

Learning to Tokenize Web Domains (Page 129)
Sriram Srinivasan (Yahoo! Software Development India)
Sourangshu Bhattachaya (Yahoo! Labs India)

Coverage Patterns for Efficient Banner Advertisement Placement (Page 131)
S. Bhargav (International Institute of Information Technology)
P. Krishna Reddy (International Institute of Information Technology)
R. Uday Kiran (International Institute of Information Technology)

Using Complex Network Features for Fast Clustering in the Web (Page 133)
Jintao Tang (National University of Defense Technology)
Ting Wang (National University of Defense Technology)
Ji Wang (National Laboratory for Parallel and Distributed Processing)
Qin Lu (Hong Kong Polytechnic University)
Wenjie Li (Hong Kong Polytechnic University)

Identifying Primary Content From Web Pages and Its Application to Web Search Ranking (Page 135)
Srinivas Vadrevu (Yahoo! Labs)
Emre Velipasaoglu (Yahoo! Labs)

A Non-Syntactic Approach for Text Sentiment Classification with Stopwords (Page 137)
Venkatasubramanian Suresh (Indian Institute of Science)
Ashok Veilumuthu (Indian Institute of Science)
Avanthi Krishnamurthy (Indian Institute of Science)
C. E. Veni Madhavan (Indian Institute of Science)
Kaushik Nath (SAP Research)
Sunil Arvindam (SAP Research)

Evaluation of Valuable User Generated Content on Social News Web Sites (Page 139)
Yana Volkovich (Barcelona Media - Centre d'Innovació)
Andreas Kaltenbrunner (Barcelona Media - Centre d'Innovació)

Is Pay-Per-Click Efficient? An Empirical Analysis of Click Values (Page 141)
Dakan Wang (Stanford University)
Gang Wang (Microsoft Research Asia)
Pinyan Lu (Microsoft Research Asia)
Yajun Wang (Microsoft Research Asia)
Zheng Chen (Microsoft Research Asia)
Botao Hu (Tsinghua University)

Scalable Spatio-Temporal Knowledge Harvesting (Page 143)
Yafang Wang (Max-Planck-Institut für Informatik)
Bin Yang (Max-Planck-Institut für Informatik)
Spyros Zoupanos (Max-Planck-Institut für Informatik)
Marc Spaniol (Max-Planck-Institut für Informatik)
Gerhard Weikum (Max-Planck-Institut für Informatik)

Growing Parallel Paths for Entity-Page Discovery (Page 145)
Tim Weninger (University of Illinois at Urbana-Champaign)
Fabio Fumarola (Università degli Studi di Bari)
Cindy Xide Lin (University of Illinois at Urbana-Champaign)
Rick Barber (University of Illinois at Urbana-Champaign)
Jiawei Han (University of Illinois at Urbana-Champaign)
Donato Malerba (Università degli Studi di Bari)

Finding Our Way on the Web: Exploring the Role of Waypoints in Search Interaction (Page 147)
Ryen W. White (Microsoft Research)
Adish Singla (Microsoft Bing)

An Adaptive Ontology-Based Approach to Identify Correlation Between Publications (Page 149)
Huayu Wu (National University of Singapore)
Hideaki Takeda (National Institute of Informatics)
Masahiro Hamasaki (National Institute of Advanced Industrial Science and Technology)
Tok Wang Ling (National University of Singapore)
Liang Xu (National University of Singapore)

Mining Collective Local Knowledge from Google MyMaps (Page 151)
Shaomei Wu (Cornell University)
Shenwei Liu (Cornell University)
Dan Cosley (Cornell University)
Michael W. Macy (Cornell University)

A Kernel Approach to Addressing Term Mismatch (Page 153)
Jun Xu (Microsoft Research Asia)
Wei Wu (Peking University)
Hang Li (Microsoft Research Asia)
Gu Xu (Microsoft Research Asia)

A Probabilistic Model for Opinionated Blog Feed Retrieval (Page 155)
Xueke Xu (Chinese Academy of Sciences)
Tao Meng (Chinese Academy of Sciences)
Xueqi Cheng (Chinese Academy of Sciences)
Yue Liu (Chinese Academy of Sciences)

A FineGrained Digestion of News Webpages Through Event Snippet Extraction (Page 157)
Rui Yan (Peking University)
Liang Kong (Peking University)
Yu Li (Beihang University)
Yan Zhang (Peking University)
Xiaoming Li (Peking University)

Caching Intermediate Result of SPARQL Queries (Page 159)
Mengdong Yang (Southeast University)
Gang Wu (Northeastern University)

Autopedia: Automatic Domain-Independent Wikipedia Article Generation (Page 161)
Conglei Yao (HP Labs China)
Xu Jia (Renmin University of China)
Sicong Shou (Peking University)
Shicong Feng (HP Labs China)
Feng Zhou (Beijing University of Technology)
Hongyan Liu (Tsinghua University)

Location Relevance Classification for Travelogue Digests (Page 163)
Mao Ye (The Pennsylvania State University)
Rong Xiao (Microsoft Research Asia)
Wang-Chien Lee (The Pennsylvania State University)
Xing Xie (Microsoft Research Asia)

Mobile Search Pattern Evolution: The Trend and the Impact of Voice Queries (Page 165)
Jeonghe Yi (Yahoo! inc.)
Farzin Maghoul (Yahoo! Inc.)

Exploiting Session-Like Behaviors in Tag Prediction (Page 167)
Dawei Yin (Lehigh University)
Liangjie Hong (Lehigh University)
Brian D. Davison (Lehigh University)

On Computing Text-Based Similarity in Scientific Literature (Page 169)
Seok-Ho Yoon (Hanyang University)
Sang-Wook Kim (Hanyang University)
Ji-Soo Kim (Hanyang University)
Won-Seok Hwang (Hanyang University)

Hierarchical Organization of Unstructured Consumer Reviews (Page 171)
Jianxing Yu (National University of Singapore)
Zheng-Jun Zha (National University of Singapore)
Meng Wang (National University of Singapore)
Tat-Seng Chua (National University of Singapore)

The Freshman Handbook: A Hint for the Server Placement of Social Networks (Page 173)
Ying Zhang (Ericsson Research)
Mallik Tatipamula (Ericsson Research)

Leveraging Auxiliary Text Terms for Automatic Image Annotation (Page 175)
Ning Zhou (University of North Carolina at Charlotte)
Yi Shen (University of North Carolina at Charlotte)
Jinye Peng (Northwestern Polytechnical University)
Xiaoyi Feng (Northwestern Polytechnical University)
Jianping Fan (University of North Carolina at Charlotte)

Demonstrations

OntoTrix: A Hybrid Visualization for Populated Ontologies (Page 177)
Benjamin Bach (Université Paris-Sud & CNRS)
Emmanuel Pietriga (Université Paris-Sud & CNRS)
Ilaria Liccardi (Université Paris-Sud & CNRS)
Gennady Legostaev (St Petersburg State University)

Factal: Integrating Deep Web Based on Trust and Relevance (Page 181)
Raju Balakrishnan (Arizona State University)
Subbarao Kambhampati (Arizona State University)

Automatically Building Probabilistic Databases from the Web (Page 185)
Lorenzo Blanco (Università degli Studi Roma Tre)
Mirko Bronzi (Università degli Studi Roma Tre)
Valter Crescenzi (Università degli Studi Roma Tre)
Paolo Merialdo (Università degli Studi Roma Tre)
Paolo Papotti (Università degli Studi Roma Tre)

Exploratory Search in Multi-Domain Information Spaces with Liquid Query (Page 189)
Alessandro Bozzon (Politecnico di Milano)
Marco Brambilla (Politecnico di Milano)
Stefano Ceri (Politecnico di Milano)
Piero Fraternali (Politecnico di Milano)
Salvatore Vadacca (Politecnico di Milano)

LivePulse: Tapping Social Media for Sentiments in Real-Time (Page 193)
Malu Castellanos (Hewlett-Packard Laboratories)
Riddhiman Ghosh (Hewlett-Packard Laboratories)
Yue Lu (Hewlett-Packard Laboratories)
Lei Zhang (Hewlett-Packard Laboratories)
Perla Ruiz (Hewlett-Packard Laboratories)
Mohamed Dekhil (Hewlett-Packard Laboratories)
Umeshwar Dayal (Hewlett-Packard Laboratories)
Meichun Hsu (Hewlett-Packard Laboratories)

Filtering Microblogging Messages for Social TV (Page 197)
Ovidiu Dan (Lehigh University)
Junlan Feng (AT&T Labs Research)
Brian Davison (Lehigh University)

T-RecS: Team Recommendation System Through Expertise and Cohesiveness (Page 201)
Anwitaman Datta (Nanyang Technological University)
Jackson Tan Teck Yong (Nanyang Technological University)
Anthony Ventresque (Nanyang Technological University)

Accelerating Instant Question Search with Database Techniques (Page 205)
Takeharu Eda (NTT Corporation)
Toshio Uchiyama (NTT Corporation)
Katsuji Bessho (NTT Corporation)
Norifumi Katafuchi (NTT Corporation)
Alice Chen (NTT Corporation)
Ryoji Kataoka (NTT Corporation)

CoSi: Context-Sensitive Keyword Query Interpretation on RDF Databases (Page 209)
Haizhou Fu (North Carolina State University)
Sidan Gao (North Carolina State University)
Kemafor Anyanwu (North Carolina State University)

Blognoon: Exploring a Topic in the Blogosphere (Page 213)
Maria Grineva (ETH Zürich)
Maxim Grinev (ETH Zürich)
Dmitry Lizorkin (Google)
Alexander Boldakov (Semantic Dimension Inc.)
Denis Turdakov (ISP RAS)
Andrey Sysoev (ISP RAS)
Alexander Kiyko (ISP RAS)

Visual Query System for Analyzing Social Semantic Web (Page 217)
Jinghua Groppe (University of Lübeck)
Sven Groppe (University of Lübeck)
Andreas Schleifer (University of Lübeck)

Embedding MindMap as a Service for User-Driven Composition of Web Applications (Page 221)
Adnene Guabtni (National ICT Australia)
Stuart Clarke (The University of New South Wales)
Boualem Benatallah (The University of New South Wales)

Helix: Online Enterprise Data Analytics (Page 225)
Oktie Hassanzadeh (IBM T.J. Watson Research Center & University of Toronto)
Songyun Duan (IBM T.J. Watson Research Center)
Achille Fokoue (IBM T.J. Watson Research Center)
Anastasios Kementsietsidis (IBM T.J. Watson Research Center)
Kavitha Srinivas (IBM T.J. Watson Research Center)
Michael J. Ward (IBM T.J. Watson Research Center)

YAGO2: Exploring and Querying World Knowledge in Time, Space, Context, and Many Languages (Page 229)
Johannes Hoffart (Max Planck Institute for Informatics)
Fabian M. Suchanek (INRIA Saclay)
Klaus Berberich (Max Planck Institute for Informatics)
Edwin Lewis-Kelham (Max Planck Institute for Informatics)
Gerard de Melo (Max Planck Institute for Informatics)
Gerhard Weikum (Max Planck Institute for Informatics)

A Demo Search Engine for Products (Page 233)
Beibei Li (New York University)
Anindya Ghose (New York University)
Panagiotis G. Ipeirotis (New York University)

DIDO: A Disease-Determinants Ontology from Web Sources (Page 237)
Victoria Nebot (Universitat Jaume I)
Jae-Hong Eom (Max-Planck Institute Computer Science)
Min Ye (Max-Planck Institute Computer Science)
Gehard Weikum (Max-Planck Institute Computer Science)

A Tool for Fast Indexing and Querying of Graphs (Page 241)
Dipali Pal (University of Missouri, Kansas City)
Praveen R. Rao (University of Missouri, Kansas City)

A User-Tunable Approach to Marketplace Search (Page 245)
Nish Parikh (eBay Research Labs)
Neel Sundaresan (eBay Research Labs)

Truthy: Mapping the Spread of Astroturf in Microblog Streams (Page 249)
Jacob Ratkiewicz (Indiana University)
Michael Conover (Indiana University)
Mark Meiss (Indiana University)
Bruno Gonçalves (Indiana University)
Snehal Patil (Indiana University)
Alessandro Flammini (Indiana University)
Filippo Menczer (Indiana University)

VoiSTV: Voice-Enabled Social TV (Page 253)
Bernard Renger (AT&T Labs - Research)
Junlan Feng (AT&T Labs - Research)
Ovidiu Dan (Lehigh University)
Harry Chang (AT&T Labs - Research)
Luciano Barbosa (AT&T Labs - Research)

Adapting a Map Query Interface for a Gesturing Touch Screen Interface (Page 257)
Hanan Samet (University of Maryland)
Benjamin E. Teitler (University of Maryland)
Marco D. Adelfio (University of Maryland)
Michael D. Lieberman (University of Maryland)

OXPath: Little Language, Little Memory, Great Value (Page 261)
Andrew Sellers (University of Oxford)
Tim Furche (University of Oxford)
Georg Gottlob (University of Oxford)
Giovanni Grasso (University of Oxford)
Christian Schallhart (University of Oxford)

CONQUER: A System for Efficient Context-Aware Query Suggestions (Page 265)
Christian Sengstock (University of Heidelberg)
Michael Gertz (University of Heidelberg)

CATE: Context-Aware Timeline for Entity Illustration (Page 269)
Tran Anh Tuan (Max-Planck Institute for Informatics)
Shady Elbassuoni (Max-Planck Institute for Informatics)
Nicoleta Preda (Laboratoire PRiSM Université de Versailles)
Gerhard Weikum (Max-Planck Institute for Informatics)

Einstein: Physicist or Vegetarian? Summarizing Semantic Type Graphs for Knowledge Discovery (Page 273)
Tomasz Tylenda (Max-Planck Institute for Informatics)
Mauro Sozio (Max-Planck Institute for Informatics)
Gerhard Weikum (Max-Planck Institute for Informatics)

Tutorials

Social Media Analytics: Tracking, Modeling and Predicting the Flow of Information Through Networks (Page 277)
Jure Leskovec (Stanford University)

Distributed Web Retrieval (Page 279)
Ricardo Baeza-Yates (Yahoo! Research)

WWW 2011 Invited Tutorial Overview: Latent Variable Models on the Internet (Page 281)
Amr Ahmed (Carnegie Mellon University)
Alexander J. Smola (Yahoo! Research)

Social Recommender Systems (Page 283)
Ido Guy (IBM Research Lab)
David Carmel (IBM Research Lab)

Ranking on Large-Scale Graphs with Rich Metadata (Page 285)
Bin Gao (Microsoft Research Asia)
Taifeng Wang (Microsoft Research Asia)
Tie-Yan Liu (Microsoft Research Asia)

Managing Crowdsourced Human Computation (Page 287)
Panagiotis G. Ipeirotis (New York University)
Praveen K. Paritosh (Google, Inc.)

Citizen Sensor Data Mining, Social Media Analytics and Development Centric Web Applications (Page 289)
Meena Nagarajan (IBM Almaden Research Center)
Amit Sheth (Wright State University)
Selvam Velmurugan (eMoksha and Kiirti)

Game Theoretic Models for Social Network Analysis (Page 291)
Yadati Narahari (Indian Institute of Science)
Ramasuri Narayanam (IBM India Research Lab)

Speech and Multimodal Interaction in Mobile Search (Page 293)
Junlan Feng (AT&T Labs Research)
Michael Johnston (AT&T Labs Research)
Srinivas Bangalore (AT&T Labs Research)

Scalable Integration and Processing of Linked Data (Page 295)
Andreas Harth (Karlsruhe Institute of Technology)
Aidan Hogan (National University of Ireland, Galway)
Spyros Kotoulas (Vrije Universiteit Amsterdam)
Jacopo Urbani (Vrije Universiteit Amsterdam)

Web-Based Open-Domain Information Extraction (Page 297)
Marius Paşca (Google Inc.)

The Web of Things (Page 299)
Carolina Fortuna (Jozef Stefan Institute)
Marko Grobelnik (Jozef Stefan Institute)

Workshop Summaries

Eighth Workshop on Information Integration on the Web (IIweb 2011) (Page 301)
Ullas B. Nambiar (IBM Research India)
L. Venkata Subramaniam (IBM Research India)

4th Linked Data on the Web Workshop (LDOW2011) (Page 303)
Christian Bizer (Freie Universität Berlin)
Tom Heath (Talis Systems Ltd.)
Tim Berners-Lee (W3C/MIT)
Michael Hausenblas (National University of Ireland, Galway)

USEWOD2011 - 1st International Workshop on Usage Analysis and the Web of Data (Page 305)
Bettina Berendt (Katholieke Universiteit Leuven)
Laura Hollink (Delft University of Technology)
Vera Hollink (Centre for Mathematics and Computer Science)
Markus Luczak-Rösch (Freie Unversität Berlin)
Knud Möller (National University of Ireland)
David Vallet (Universidad Autónoma de Madrid)

The 1st Temporal Web Analytics Workshop (TWAW) (Page 307)
Ricardo Baeza-Yates (Yahoo! Research)
Julien Masanès (Internet Memory Foundation)
Marc Spaniol (Max-Planck-Institut für Informatik)

First International Workshop on Social Media Engagement (SoME 2011) (Page 309)
Alejandro Jaimes (Yahoo! Research)
Mounia Lalmas (Yahoo! Research)
Yana Volkovich (Barcelona Media)

Second International Workshop on RESTful Design (WS-REST 2011) (Page 311)
Cesare Pautasso (University of Lugano)
Erik Wilde (University of California, Berkeley)
Rosa Alarcon (Pontificia Universidad Catolica)

Joint WICOW/AIRWeb Workshop on Web Quality (WebQuality 2011) (Page 313)
Carlos Castillo (Yahoo! Research)
Zoltan Gyongyi (Google Research)
Adam Jatowt (Kyoto University)
Katsumi Tanaka (Kyoto University)

SemSearch'11 - the 4th Semantic Search Workshop (Page 315)
Thanh Tran (KIT)
Peter Mika (Yahoo! Research)
Haofen Wang (Shanghai Jiao Tong University)
Marko Grobelnik (Jozef Stefan Institute)

Second International Workshop on Web Science and Information Exchange in the Medical Web (MedEx 2011) (Page 317)
Kerstin Denecke (L3S Research Center)
Peter Dolog (Aalborg University)

DiversiWeb 2011: First International Workshop on Knowledge Diversity on the Web (Page 319)
Elena Simperl (KIT)
Devika P. Madalli (Indian Statistical Institute)
Denny Vrandečić (KIT)
Enrique Alfonseca (Google)

Workshop on Online Reputation: Context, Privacy, and Reputation Management (Page 321)
Judd Antin (Yahoo! Research)
Elizabeth F. Churchill (Yahoo! Research)
Bee-Chung Chen (Yahoo! Research)

PlayIt 2011: First International Workshop on Games for Knowledge Acquisition (Page 323)
Katharina Siorpaes (University of Innsbruck)
Elena Simperl (KIT)
Arpita Ghosh (Yahoo! Research)
Michael Fink (Google)

Panel Sessions

The Computer Is the New Sewing Machine: Benefits and Perils of Crowdsourcing (Page 325)
Praveen Paritosh (Google & Northwestern University)
Matt Cooper (oDesk)
Panos Ipeirotis (New York University)
Siddharth Suri (Yahoo! Research)

Social Media: Source of Information or Bunch of Noise (Page 327)
Amr El Abaddi (University of California, Santa Barbara)
Lars Backstrom (Facebook)
Jure Leskovec (Stanford)
Soumen Chakrabarti (IIT Bombay)
Andrew Tomkins (Google)
Alejandros Jaimes (Yahoo! Research Barcelona)

Connecting the Next Billion Web Users (Page 329)
Rajeev Rastogi (Yahoo! Labs Bangalore)
Ed Cutrell (Microsoft Research India)
Manish Gupta (IBM Research India)
Ashok Jhunjhunwala (IIT Madras)
Ramkumar Narayan (Yahoo! India)
Rajeev Sanghal (IIIT Hyderabad)

PhD Symposium

Addressing the RDFa Publishing Bottleneck (Page 331)
Xi Bai (University of Edinburgh)

Towards Liquid Service Oriented Architectures (Page 337)
Daniele Bonetta (University of Lugano)
Cesare Pautasso (University of Lugano)

Analysis and Tracking of Emotions in English and Bengali Texts: A Computational Approach (Page 343)
Dipankar Das (Jadavpur University)

Computational Advertising: Leveraging User Interaction & Contextual Factors for Improved Ad Retrieval & Ranking (Page 349)
Kushal Dave (International Institute of Information Technology)

Standing on the Shoulders of Ants: Stigmergy in the Web (Page 355)
Aiden Dipple (Queensland University of Technology)

Ranked Answer Graph Construction for Keyword Queries on RDF Graphs without Distance Neighbourhood Restriction (Page 361)
K. Parthasarathy (Indian Space Research Organisation)
P. Kumar Sreenivasa (Indian Institute of Technology, Madras)
Dominic Damien (Indian Space Research Organisation)

A Politeness Recognition Tool for Hindi: With Special Emphasis on Online Texts (Page 367)
Ritesh Kumar (Jawaharlal Nehru University)

Measurement and Analysis of Cyberlocker Services (Page 373)
Aniket Mahanti (University of Calgary)

Fuzzy Associative Rule-Based Approach for Pattern Mining and Identification and Pattern-Based Classification (Page 379)
Ashish Mangalampalli (International Institute of Information Technology)

Performance Enhancement of Scheduling Algorithms in Clusters and Grids Using Improved Dynamic Load Balancing Techniques (Page 385)
Hemant Kumar Mehta (Devi Ahilya University)
Priyesh Kanungo (Patel Group of Institutions)
Manohar Chandwani (Devi Ahilya University)

Wikipedia Vandalism Detection (Page 391)
Santiago M. Mola-Velasco (Universidad Politécnica de Valencia)

Dynamic Learning-Based Mechanism Design for Dependent Valued Exchange Economies (Page 397)
Swaprava Nath (Indian Institute of Science)

Sentence-Level Contextual Opinion Retrieval (Page 403)
Sylvester Olubolu Orimaye (Monash University)

The Oxpath to Success in the Deep Web (Page 409)
Andrew Sellers (University of Oxford)

Cooperative Anti-Spam System Based on Multilayer Agents (Page 415)
Wenxuan Shi (University of Nankai)
Maoqiang Xie (University of Nankai)
Yalou Huang (University of Nankai)

Summarization of Archived and Shared Personal Photo Collections (Page 421)
Pinaki Sinha (University of California, Irvine)

Application of Semantic Web Technologies for Multimedia Interpretation (Page 427)
Ruben Verborgh (Ghent University)

Web for Emerging Regions

The Lwazi Community Communication Service: Design and Piloting of a Voice-Based Information Service (Page 433)
Aditi Sharma Grover (CSIR Meraka Institute)
Etienne Barnard (CSIR Meraka Institute & North-West University)

Analyzing and Accelerating Web Access in a School in Peri-Urban India (Page 443)
Jay Chen (New York University)
David Hutchful (Microsoft Research India)
William Thies (Microsoft Research india)
Lakshminarayanan Subramanian (New York University)

Design and Implementation of Contextual Information Portals (Page 453)
Jay Chen (New York University)
Russell Power (New York University)
Lakshminarayanan Subramanian (New York University)
Jonathan Ledlie (Nokia Research Center)

Location Specific Summarization of Climatic and Agricultural Trends (Page 463)
Sunandan Chakraborty (New York University)
Lakshminarayanan Subramanian (New York University)

Low-Infrastructure Methods to Improve Internet Access for Mobile Users in Emerging Regions (Page 473)
Sibren Isaacman (Princeton University)
Margaret Martonosi (Princeton University)

Identifying Enrichment Candidates in Textbooks (Page 483)
Rakesh Agrawal (Microsoft Corp)
Sreenivas Gollapudi (Microsoft Corp)
Anitha Kannan (Microsoft Corp)
Krishnaram Kenthapadi (Microsoft Corp)

Traffic Characterization and Internet Usage in Rural Africa (Page 493)
David L. Johnson (University of California, Santa Barbara)
Veljko Pejovic (University of California, Santa Barbara)
Elizabeth M. Belding (University of California, Santa Barbara)
Gertjan van Stam (Linknet)

Two-Stream Indexing for Spoken Web Search (Page 503)
Jitendra Ajmera (IBM Research)
Anupam Joshi (University of Maryland, Baltimore County)
Sougata Mukherjea (IBM Research)
Nitendra Rajput (IBM Research)
Shrey Sahay (IBM Research)
Mayank Shrivastava (Indian Institute of Technology)
Kundan Srivastava (IBM Research)

Assistive Technology for Vision-Impairments: An Agenda for the ICTD Community (Page 513)
Joyojeet Pal (University of Michigan, Ann Arbor)
Manas Pradhan (Polytechnic Institute of New York University)
Mihir Shah (Polytechnic Institute of New York University)
Rakesh Babu (University of North Carolina, Greensboro)