Proceedings – wwwconference org

Proceedings of the 17th International World Wide Web Conference
(WWW2008)
April 21-25, 2008
Beijing, China

Session: Browsers and UI

Session Chair: Xing Xie (Microsoft Research Asia)

Personalized Web Exploration with Task Models 1
Jae-wook Ahn, Peter Brusilovsky, Daqing He, Jonathan Grady, Qi Li (University of Pittsburgh)
Validating the Use and Role of Visual Elements of Web Pages in Navigation with an Eye-Tracking Study 11
Yeliz Yesilada, Caroline Jay, Robert Stevens, Simon Harper (University of Manchester)
Improving Relevance Judgment of Web Search Results with Image Excerpts 21
Zhiwei Li, Shuming Shi, Lei Zhang (Microsoft Research Asia)
KeySurf: A Character Controlled Browser for People with Physical Disabilities 31
Leo Spalteholz, Kin Fun Li, Nigel Livingston, Foad Hamidi (University of Victoria)

Session: Data Mining – Log Analysis

Session Chair: Masaru Kitsuregawa (University of Tokyo)

Query-Sets: Using Implicit Feedback and Query Patterns to Organize Web Documents 41
Barbara Poblete (University Pompeu Fabra), Ricardo Baeza-Yates (Yahoo! Research & Barcelona Media Innovation Center)
Mining the Search Trails of Surfing Crowds: Identifying Relevant Websites From User Activity 51
Mikhail Bilenko, Ryen W. White (Microsoft Research)
Using the Wisdom of the Crowds for Keyword Generation 61
Ariel Fuxman, Panayiotis Tsaparas, Kannan Achan, Rakesh Agrawal (Microsoft Research)

Session: Data Mining – Learning

Session Chair: Alex Ntoulas (Microsoft Research)

FloatCascade Learning for Fast Imbalanced Web Mining 71
Xiaoxun Zhang (IBM China Research Lab), Xueying Wang (Peking University),
Honglei Guo, Zhili Guo, Xian Wu, Zhong Su (IBM China Research Lab)
Recommending Questions Using the MDL-based Tree Cut Model 81
Yunbo Cao (Shanghai Jiao Tong University and Microsoft Research Asia), Huizhong Duan (Shanghai Jiao Tong University),
Chin-Yew Lin (Microsoft Research Asia),
Yong Yu (Shanghai Jiao Tong University),
Hsiao-Wuen Hon (Microsoft Research Asia)
Learning to Classify Short and Sparse Text & Web with Hidden Topics from Large-scale Data Collections 91
Xuan-Hieu Phan (Tohoku University),
Le-Minh Nguyen (Japan Advanced Institute of Science & Technology),
Susumu Horiguchi (Tohoku University)

Session: Data Mining – Modeling

Session Chair: Kunal Punera (Yahoo! Research)

Topic Modeling with Network Regularization 101
Qiaozhu Mei, Deng Cai, Duo Zhang, ChengXiang Zhai (University of Illinois at Urbana-Champaign)
Modeling Online Reviews with Multi-grain Topic Models 111
Ivan Titov (University of Illinois at Urbana-Champaign),
Ryan McDonald (Google Inc.)
Opinion Integration Through Semi-supervised Topic Modeling 121
Yue Lu, Cheng Xiang Zhai (University of Illinois at Urbana-Champaign)

Session: Data Mining – Algorithms

Session Chair: Ravi Kumar (Yahoo! Research)

Efficient Similarity Joins for Near Duplicate Detection 131
Chuan Xiao, Wei Wang, Xuemin Lin, JeffreyXu Yu (Chinese University of Hong Kong)
Learning Multiple Graphs for Document Recommendations 141
Ding Zhou (Facebook Inc.),
Shenghuo Zhu, Kai Yu (NEC Labs America),
Xiaodan Song (Google Inc),
Belle L. Tseng (Yahoo! Inc.),
Hongyuan Zha (Georgia Institute of Technology),
C. Lee Giles (The Pennsylvania State University)
Enhanced Hierarchical Classification via Isotonic Smoothing 151
Kunal Punera (Yahoo! Research),
Joydeep Ghosh (University of Texas at Austin)

Session: Internet Monetization – Online Advertising

Session Chair: Ying Li (Microsoft AdCenter)

Externalities in Online Advertising 161
Arpita Ghosh, Mohammad Mahdian (Yahoo! Research)
A Combinatorial Allocation Mechanism With Penalties For Banner Advertising 169
Ureil Feige (Weizmann Institute),
Nicole Immorlica (Centrum voor Wiskunde en Informatica),
Vahab S. Mirrokni (Microsoft Research),
Hamid Nazerzadeh (Stanford University)
Dynamic Cost-Per-Action Mechanisms and Applications to Online Advertising 179
Hamid Nazerzadeh, Amin Saberi (Stanford University),
Rakesh Vohra (Northwestern University)

Session: Internet Monetization – Recommendation and Security

Session Chair: Nicole Immorlica (Northwestern University)

Optimal Marketing Strategies over Social Networks 189
Jason Hartline (Northwestern University),
Vahab Mirrokni (Microsoft Resarch),
Mukund Sundararajan (Stanford University)
Trust-Based Recommendation Systems: An Axiomatic Approach 199
Reid Andersen, Christian Borgs, Jennifer Chayes (Microsoft Research),
Uriel Feige (Weizmann Institute of Science),
Abraham Flaxman (Microsoft Research),
Adam Kalai (Georgia Institute of Technology),
Vahab Mirrokni (Microsoft Research),
Moshe Tennenholtz (Technion-Israel Institute of Technology)
Secure or Insure? A Game-Theoretic Analysis of Information Security Games 209
Jens Grossklags (University of California at Berkeley),
Nicolas Christin (Carnegie Mellon University),
John Chuang (University of California at Berkeley)

Session: Internet Monetization – Sponsored Search

Session Chair: Amin Saberi (Stanford University)

Analyzing Search Engine Advertising: Firm Behavior and Cross-Selling in Electronic Markets 219
Anindya Ghose (New York University),
Sha Yang (New York University)
Online Learning from Click Data for Sponsored Search 227
Massimiliano Ciaramita, Vanessa Murdock, Vassilis Plachouras (Yahoo! Research)

Session: Mobility

Session Chair: Wang-Chien Lee (Pennsylvania State University)

Supporting Anonymous Location Queries in Mobile Environments with PrivacyGrid 237
Bhuvan Bamba, Ling Liu, Peter Pesti, Ting Wang (Georgia Institute of Technology)
Learning Transportation Mode from Raw GPS Data for Geographic Applications on the Web 247
Yu Zheng, Like Liu, Longhao Wang, Xing Xie (Microsoft Research Asia)
Deciphering Mobile Search Patterns: A Study of Yahoo! Mobile Search Queries 257
Jeonghee Yi, Farzin Maghoul, Jan Pedersen (Yahoo! Inc.)

Session: Performance and Scalability

Session Chair: Anirban Mahanti (Indian Institute of Technology Delhi)

Service-Oriented Data Denormalization for Scalable Web Applications 267
Zhou Wei, Jiang Dejun (Tsinghua University),
Guillaume Pierre (Vrije Universiteit),
Chi-Hung Chi (Tsinghua University),
Maarten van Steen (Vrije Universiteit)
Anycast CDNs Revisited 277
Hussein A. Alzboubi (Case Western Reserve University),
Seungjoon Lee (AT&T Labs – Research),
Michael Rabinovich (Case Western Reserve University),
Oliver Spatscheck, Jacobus Van der Merwe (AT&T Labs – Research)
A Comparative Analysis of Web and Peer-to-Peer Traffic 287
Naimul Basher, Aniket Mahanti (University of Calgary),
Anirban Mahanti (Indian Institute of Technology),

Session: Rich Media

Session Chair: Edward Chang (Google)

Generating Diverse and Representative Image Search Results for Landmarks 297
Lyndon Kennedy (Columbia University),
Mor Naaman (Yahoo! Inc.)
PageRank for Product Image Search 307
Yushi Jing (Georgia Institute of Technology and Google, Inc.),
Shumeet Baluja (Google Inc.)
Graph Theoretical Framework for Simultaneously Integrating Visual and Textual Features for Efficient Web Image Clustering 317
Manjeet Rege, Ming Dong, Jing Hua (Wayne State University)
Flickr Tag Recommendation based on Collective Knowledge 327
Börkur Sigurbjörnsson, Roelof van Zwol (Yahoo! Research)

Session: Search – Query Analysis

Session Chair: Nick Craswell (Microsoft Research)

Modeling Anchor Text and Classifying Queries to Enhance Web Document Retrieval 337
Atsushi Fujii (University of Tsukuba)
Unsupervised Query Segmentation Using Generative Language Models and Wikipedia 347
Bin Tan (University of Illinois at Urbana-Champaign),
Fuchun Peng (Yahoo! Inc.)
Spatial Variation in Search Engine Queries 357
Lars Backstrom, Jon Kleinberg (Cornell University),
Ravi Kumar, Jasmine Novak (Yahoo! Research)

Session: Search – Corpus Characterization & Search Performance

Session Chair: Hongyuan Zha (Georgia Institute of Technology)

Genealogical Trees on the Web: A Search Engine User Perspective 367
Ricardo Baeza-Yates, Álvaro Pereira, Nivio Ziviani (Federal University of Minas Gerais)
A Graph-Theoretic Approach to Webpage Segmentation 377
Deepayan Chakrabarti, Ravi Kumar, Kunal Punera (Yahoo! Research)
Performance of Compressed Inverted List Caching in Search Engines 387
Jiangong Zhang (Polytechnic University),
Xiaohui Long (Microsoft Corporation),
Torsten Suel (Polytechnic University)

Session: Search – Ranking and Retrieval Enhancement

Session Chair: Ricardo Baeza-Yate (Yahoo!)

Ranking Refinement and Its Application to Information Retrieval 397
Rong Jin (Michigan State University),
Hamed Valizadegan (Michigan State University),
Hang Li (Microsoft Research Asia)
Learning to Rank Relational Objects and Its Application to Web Search 407
Tao Qin (Tsinghua University),
Tie-Yan Liu (Microsoft Research Asia),
Xu-Dong Zhang, De-Sheng Wang (Tsinghua University),
Wen-Ying Xiong (Peking University),
Hang Li (Microsoft Research Asia)
Contextual Advertising by Combining Relevance with Click Feedback 417
Deepayan Chakrabarti, Deepak Agarwal, Vanja Josifovski (Yahoo! Research)

Session: Search – Crawlers

Session Chair: Hang Li (Microsoft Research Asia)

IRLbot: Scaling to 6 Billion Pages and Beyond 427
Hsin-Tsang Lee, Derek Leonard, Xiaoming Wang, Dmitri Loguinov (Texas A&M University)
Recrawl Scheduling Based on Information Longevity 437
Christopher Olston (Yahoo! Research),
Sandeep Pandey (Carnegie Mellon University)
iRobot: An Intelligent Crawler for Web Forums 447
Rui Cai, Jiang-Ming Yang, Wei Lai, Yida Wang, Lei Zhang (Microsoft Research, Asia)

Session: Search – Applications

Session Chair: Ronny Lempel (Yahoo! Research)

Automatic Online News Issue Construction in Web Environment 457
Canhui Wang, Min Zhang, Shaoping Ma, Liyun Ru (Tsinghua University)
Finding the Right Facts in the Crowd: Factoid Question Answering over Social Media 467
Jiang Bian (Georgia Institute of Technology),
Yandong Liu, Eugene Agichtein (Emory University),
Hongyuan Zha (Georgia Institute of Technology)
Personalized Interactive Faceted Search 477
Jonathan Koren, Yi Zhang (University of California, Santa Cruz),
Xue Liu (McGill University)

Session: Security I – Misc

Session Chair: Collin Jackson (Stanford University)

Privacy-Enhanced Sharing of Personal Content on the Web 487
Mohammad Mannan, Paul C. van Oorschot (Carleton University)
Detecting Image Spam using Visual Features and Near Duplicate Detection 497
Bhaskar Mehta (Google Inc.),
Saurabh Nangia, Manish Gupta (IIT Guwahati),
Wolfgang Nejdl (L3S Forschungszentrum)
Better Abstractions for Secure Server-Side Scripting 507
Dachuan Yu, Ajay Chander, Hiroshi Inamura, Igor Serikov (DoCoMo Communications Laboratories USA, Inc.)

Session: Security II – Web Client Security

Session Chair: Mary Ellen Zurko (IBM)

SessionLock: Securing Web Sessions against Eavesdropping 517
Ben Adida (Harvard University)
ForceHTTPS: Protecting High-Security Web Sites from Network Attacks 525
Collin Jackson, Adam Barth (Stanford University)
SMash: Secure Component Model for Cross-Domain Mashups on Unmodified Browsers 535
Frederik De Keukelaere (IBM Tokyo Research Laboratory),
Sumeer Bhola, Michael Steiner, Suresh Chari (IBM T.J. Watson Research Center),
Sachiko Yoshihama (IBM Tokyo Research Laboratory)
CompoWeb: A Component-Oriented Web Architecture 545
Rui Guo (Beihang University),
Bin B. Zhu, Min Feng, Aimin Pan (Microsoft Research Asia),
Bosheng Zhou (Beihang University)

Session: Semantic Web I

Session Chair: R V Guha (Google)

Structured Objects in OWL: Representation and Reasoning 555
Boris Motik, Bernardo Cuenca Grau (University of Oxford),
Ulrike Sattler (University of Manchester)
Computing Minimum Cost Diagnoses to Repair Populated DL-based Ontologies 565
Jianfeng Du, Yi-Dong Shen (Chinese Academy of Sciences)
Scalable Querying Services over Fuzzy Ontologies 575
Jeff Z. Pan (University of Aberdeen),
Giorgos Stamou, Giorgos Stoilos (NTUA),
Stuart Taylor, Edward Thomas (University of Aberdeen)

Session: Semantic Web II

Session Chair: Juanzi Li (Tsinghua University)

Networked Graphs: A Declarative Mechanism for SPARQL Rules, SPARQL Views and RDF Data Integration on the Web 585
Simon Schenk, Steffen Staab (University of Koblenz-Landau)
SPARQL Basic Graph Pattern Optimization Using Selectivity Estimation 595
Markus Stocker, Andy Seaborne (HP Laboratories),
Abraham Bernstein, Christoph Kiefer (University of Zurich),
Dave Reynolds (HP Laboratories)
Saling RDF with Time 605
Andrea Pugliese, Octavian Udrea, V. S. Subrahmanian (University of Maryland)

Session: Semantic Web III

Session Chair: Riichiro Mizoguchi (Osaka University)

Wiki Content Templating 615
Angelo Di Iorio, Fabio Vitali, Stefano Zacchiroli (University of Bologna)
Querying for Meta Knowledge 625
Bernhard Schueler, Sergej Sizov, Steffen Staab, Duc Thanh Tran (University of Karlsruhe)
Automatically Refining the Wikipedia Infobox Ontology 635
Fei Wu, Daniel S. Weld (University of Washington)

Session: Social Networks – Analysis of Social Networks & Online Interactive Spaces

Session Chair: Yutaka Matsuo (University of Tokyo)

Statistical Analysis of the Social Network and Discussion Threads in Slashdot 645
Vicenç Gómez (Barcelona Media Centre d’Innovació),
Andreas Kaltenbrunner (Universitat Pompeu Fabra),
Vicente López (Barcelona Media Centre d’Innovació)
Yes, There is a Correlation – From Social Networks to Personal Behavior on the Web 655
Parag Singla (University of Washington),
Matthew Richardson (Microsoft Research)
Knowledge Sharing and Yahoo Answers: Everyone Knows Something 665
Lada A. Adamic, Jun Zhang, Eytan Bakshy, Mark S. Ackerman (University of Michigan)

Session: Social Networks – Discovery & Evolution of Communities

Session Chair: Matthew Hurst (Microsoft)

Tag-based Social Interest Discovery 675
Xin Li, Lei Guo, Yihong Eric Zhao (Yahoo! Inc.)
FacetNet: A Framework for Analyzing Communities and Their Evolutions in Dynamic Networks 685
Yu-Ru Lin (Arizona State University),
Yun Chi, Shenghuo Zhu (NEC Laboratories America),
Hari Sundaram (Arizona State University),
Belle L. Tseng (Yahoo! Inc.)
Statistical Properties of Community Structure in Large Social & Information Networks 695
Jure Leskovec (Carnegie Mellon University),
Kevin J. Lang, Anirban Dasgupta, Michael W. Mahoney (Yahoo! Research)

Session: Social Networks – Applications and Infrastructures for Web 2.0

Session Chair: Lada Adamic (University of Michigan)

Why Web 2.0 is Good for Learning and for Research: Principles and Prototypes 705
Carsten Ullrich (Shanghai Jiao Tong University),
Kerstin Borau (SJTU Network Education College),
Heng Luo, Xiaohong Tan, Liping Shen, Ruimin Shen (Shanghai Jiaotong University)
Exploring Social Annotations for Information Retrieval 715
Ding Zhou (Facebook Inc.),
Jiang Bian (Georgia Institute of Technology),
Shuyi Zheng (The Pennsylvania State University),
Hongyuan Zha (Georgia Institute of Technology),
C. Lee Giles (The Pennsylvania State University)
Lock-Free Consistency Control for Web 2.0 Applications 725
Jiangming Yang (Fudan University and Microsoft Research Asia),
Hai-xun Wang (IBM T. J. Watson Research Center),

Session: Web Engineering – Applications

Session Chair: Daniel Schwabe (Catholic University)

Mining, Indexing, and Searching for Textual Chemical Molecule Information on the Web 735
Bingjun Sun, Prasenjit Mitra, C. Lee Giles (The Pennsylvania State University)
Value-Driven Design for “Infosuasive” Web Applications 745
Davide Bolchini (University College London and University of Lugano),
Franca Garzotto (Politecnico di Milano),
Paolo Paolini (Politecnico di Miano and University of Lugano)
Organizing and Sharing Distributed Personal Web-Service Data 755
Roxana Geambasu, Cherie Cheung, Alexander Moshchuk, Steven D. Gribble, Henry M. Levy (University of Washington)

Session: Web Engineering – Web Service Composition

Session Chair: Martin Gaedke (Chemnitz University of Technology)

Matching Independent Global Constraints for Composite Web Services 765
Nalaka Gooneratne, Zahir Tari (RMIT University)
Wishful Search: Interactive Composition of Data Mashups 775
Anton V. Riabov, Eric Bouillet, Mark D. Feblowitz, Zhen Liu, Anand Ranganathan (IBM T. J. Watson Research Center)
Extending the Compatibility Notion for Abstract WS-BPEL Processes 785
Dieter König (IBM Böblingen Laboratory),
Niels Lohmann (Universität Rostock),
Simon Moser (IBM Böblingen Laboratory),
Christian Stahl (Humboldt-Universität zu Berlin),
Karsten Wolf (Universität Rostock)

Session: Web Engineering – Web Service Deployment

Session Chair: Geert-Jan Hoube (Vrije Universiteit Brussel)

Investigating Web Services on the World Wide Web 795
Eyhab Al-Masri, Qusay H. Mahmoud (University of Guelph)
RESTful Web Services vs. “Big” Web Services: Making the Right Architectural Decision 805 Cesare Pautasso (University of Lugano),
Olaf Zimmermann (IBM Zurich Research Laboratory),
Frank Leymann (University of Stuttgart)
Non-Intrusive Monitoring and Service Adaptation for WS-BPEL 815
Oliver Moser, Florian Rosenberg, Schahram Dustdar (Technical University Vienna)

Session: XML I

Session Chair: Andrea Pugliese (University of Calabria)

Learning Deterministic Regular Expressions for the Inference of Schemas from XML Data 825
Geert Jan Bex, Wouter Gelade, Frank Neven, Stijn Vansummeren (Hasselt University/Transnational University of Limburg)
Efficient Evaluation of Generalized Path Pattern Queries on XML Data 835
Xiaoying Wu (NJIT),
Stefanos Souldatos (NTUA),
Dimitri Theodoratos (NJIT),
Theodore Dalamagas, Timos Sellis (NTUA)
On Incremental Maintenance of 2-hop Labeling of Graphs 845
Ramadhana Bramandia, Byron Choi, Wee Keong Ng (Nanyang Technological University)

Session: XML II

Session Chair: Geert-Jan Bex (Hasselt University/Transnational University of Limburg, Belgium)

XML Data Dissemination using Automata on Top of Structured Overlay Networks 865
Iris Miliaraki, Zoi Kaoudi, Manolis Koubarakis (National and Kapodistrian University of Athens)
Utility-driven Load Shedding for XML Stream Processing 855
Mingzhu Wei, Elke A. Rundensteiner, Murali Mani (Worcester Polytechnic Institute)
SewNet – A Framework for Creating Services Utilizing Telecom Functionality 875
Sumit Mittal, Dipanjan Chakraborty, Sunil Goyal, Sougata Mukherjea (IBM India Research Laboratory)

Session: Industrial Track Session

Session Chair: Jayavel Shanmugasundaram (Yahoo! Research)

Characterizing Typical and Atypical User Sessions in Clickstreams 885
Narayanan Sadagopan (Yahoo!),
Jie Li (Yahoo!)
Video Suggestion and Discovery for YouTube: Taking Random Walks Through the View Graph 895
Shumeet Baluja, Rohan Seth, D. Sivakumar, Yushi Jing, Jay Yagnik, Shankar Kumar, Deepak Ravichandran (Google Inc.),
Mohamed Aly (University of Pittsburgh)
How People Use the Web on Mobile Devices 905
Yanqing Cui, Virpi Roto (Nokia Research Center)
Planetary-Scale Views on a Large Instant-Messaging Network 915
Jure Leskovec (Carnegie Mellon University),
Eric Horvitz (Microsoft Research)
Online Auctions Efficiency: A Survey of eBay Auctions 925
Hu Wenyan, Alvaro Bolivar (eBay Inc.)

Session: Technology for Developing Regions

Session Chair: Lakshminarayanan Subramanian (New York University)

Organizing the Unorganized – Employing IT to Empower the Under-privileged 935
Arun Kumar, Nitendra Rajput, Sheetal Agarwal, Dipanjan Chakraborty, Amit Anil Nanavati (IBM India Research Laboratory)
DTWiki: A Disconnection and Intermittency Tolerant Wiki 945
Bowei Du, Eric A. Brewer (University of California, Berkeley)
Action Science Approach to Nonprofit Housing Services using Web 2.0 Mapping Tools 953
Yao-Jen Chang, Hsin-Yu Hsu (Chung Yuan Christian University),
Tsen-Yung Wang (National Yanh Ming University)

Session: WWW in China – Mining the Chinese Web

Session Chair: Zaiqing Nie (Microsoft Research Asia)

Hidden Sentiment Association in Chinese Web Opinion Mining 959
Qi Su, Xinying Xu (Peking University),
Honglei Guo, Zhili Guo, Xian Wu, Xiaoxun Zhang (IBM China Research Laboratory),
Bin Swen (Peking University),
Zhong Su (IBM China Research Laboratory)
Can Chinese Web Pages be Classified with English Data Source? 969
Xiao Ling, Gui-Rong Xue, Wenyuan Dai, Yun Jiang (Shanghai Jiao Tong University),
Qiang Yang (Hong Kong University of Science and Technology),
Yong Yu (Shanghai Jiao Tong University)
Substructure Similarity Measurement in Chinese Recipes 979
Liping Wang, Qing Li, Na Li (City University of Hong Kong),
Guozhu Dong (Wright State University),
Yu Yang (City University of Hong Kong)

Session: WWW in China – Chinese Web Innovations

Session Chair: Qing Li (City University of Hong Kong)

Efficient Multi-keyword Search over P2P Web 989
Hanhua Chen, Hai Jin, Jiliang Wang, Lei Chen, Yunhao Liu, Lionel M. Ni (Hong Kong University of Science and Technology)
Towards a Global Schema for Web Entities 999
Conglei Yao, Yongjian Yu, Sicong Shou, Xiaoming Li (Peking University)
Web Video Topic Discovery and Tracking via Bipartite Graph Reinforcement Model 1009
Lu Liu, Lifeng Sun, Yong Rui, Yao Shi, Shiqiang Yang (Tsinghua University)

Poster Session

The Seamless Browser: Enhancing the Speed of Web Browsing by Zooming and Preview Thumbnails 1019
Byung In Yoo, Jong Ho Lea, Yeun Bae Kim (Samsung Advanced Institute of Technology)
What Do They Think? Aggregating Local Views about News Events and Topics 1021
Jiahui Liu, Larry Birnbaum (Northwestern University)
Personalized View-Based Search and Visualization as a Means for Deep/Semantic Web Data Access 1023
Michal Tvarožek, Mária Bieliková (Slovak University of Technology)
Personalized Multimedia Web Summarizer for Tourist 1025
Xiao Wu, Jintao Li, Yongdong Zhang, Sheng Tang (Chinese Academy of Sciences),
Shi-Yong Neo (National University of Singapore)
A Generic Framework for Collaborative Multi-perspective Ontology Acquisition 1027
Maayan Zhitomirsky-Geffet, Judit Bar-Ilan, Yitzchak Miller, Snunith Shoham (Bar-Ilan University)
As We May Perceive: Finding the Boundaries of Compound Documents on the Web 1029
Pavel Dmitriev (Cornell University)
Personalized Search and Exploration with MyTag 1031
Max Braun, Klaas Dellschaft, Thomas Franz, Dominik Hering, Peter Jungen, Hagen Metzler, Eugen Müller , Alexander Rostilov, Carsten Saathoff (University Koblenz-Landau)
Emergence of Terminological Conventions as an Author-Searcher Coordination Game 1033
David Bodoff, Sheizaf Rafaeli (University of Haifa)
System: A Hypergraph Based Native RDF Repository 1035
Gang Wu, Juanzi Li, Kehong Wang (Tsinghua University)
Efficient Vectorial Operators for Processing XML Twig Queries 1037
Guoliang Li, Jianhua Feng, Jianyong Wang, Feng Lin, Lizhu Zhou (Tsinghua University)
User Behavior Oriented Web Spam Detection 1039
Yiqun Liu, Min Zhang, Shaoping Ma, Liyun Ru (Tsinghua University)
Feature Weighting in Content Based Recommendation System Using Social Network Analysis 1041
Souvik Debnath, Niloy Ganguly, Pabitra Mitra (Indian Institute of Technology)
Extracting Spam Blogs with Co-citation Clusters 1043
Kazunari Ishida (The University of Shimane)
RACE: Finding and Ranking Compact Connected Trees for Keyword Proximity Search over XML Documents 1045
Guoliang Li, Jianhua Feng, Jianyong Wang (Tsinghua University),
Bei Yu (National University of Singapore),
Yukai He (Tsinghua University)
The Scale-Free Nature of Semantic Web Ontology 1047
Hongyu Zhang (Tsinghua University)
Asymmetrical Query Recommendation Method Based on Bipartite Network Resource Allocation 1049
Zhiyuan Liu, Maosong Sun (Tsinghua University)
Efficient Mining of Frequent Sequence Generators 1051
Chuancong Gao, Jianyong Wang, Yukai He, Lizhu Zhou (Tsinghua University)
Efficiently Querying RDF Data in Triple Stores 1053
Ying Yan (Fudan University),
Chen Wang (IBM China Research Laboratory),
Aoying Zhou (Fudan University, East China Normal University),
Weining Qian (East China Normal University),
Li Ma, Yue Pan (IBM China Research Laboratory)
Collaborative Knowledge Semantic Graph Image Search 1055
Jyh-Ren Shieh, Yang-Ting Yeh, Chih-Hung Lin (National Taiwan University),
Ching-Yung Lin (IBM T. J. Watson Research Center),
Ja-Ling Wu (National Taiwan University)
A Logical Framework for Modeling and Reasoning about Semantic Web Services Contract 1057
Hai Liu (University of Science and Technology of China and City University of Hong Kong),
Qing Li (City University of Hong Kong),
Naijie Gu (University of Science and Technology of China and City University of Hong Kong),
An Liu (University of Science and Technology of China)
Dissemination of Heterogeneous XML Data 1059
Yuan Ni (IBM China Research Laboratory),
Chee-Yong Chan (National University of Singapore)
SAILER: An Effective Search Engine for Unified Retrieval of Heterogeneous XML and Web Documents 1061
Guoliang Li, Jianhua Feng, Jianyong Wang, Xiaoming Song, Lizhu Zhou (Tsinghua University)
Personalized Tag Suggestion for Flickr 1063
Nikhil Garg, Ingmar Weber (Ecole Polytechnique Fédérale de Lausanne)
Larger is Better: Seed Selection in Link-based Anti-spamming Algorithms 1065
Qiancheng Jiang, Lei Zhang, Yizhen Zhu, Yan Zhang (Peking University)
Using Subspace Analysis for Event Detection from Web Click-through Data 1067
Ling Chen, Yiqun Hu, Wolfgang Nejdl (L3S Research Center)
A Domain-specific Language for the Model-driven Construction of Advanced Web-based Dialogs 1069
Patrick Freudenstein, Martin Nussbaumer, Florian Allerding (University of Karlsruhe (TH)),
Martin Gaedke (Chemnitz University of Technology)
Web People Search: Results of the first evaluation and plan for the second 1071
Javier Artiles (UNED NLP&IR Group),
Satoshi Sekine (New York University),
Julio Gonzalo (UNED NLP&IR Group)
Context-Based Page Unit Recommendation for Web-Based Sensemaking Tasks 1073
Wen-Huang Cheng (National Taiwan University),
David Gotz (IBM T.J. Watson Research Center)
Web Page Rank Prediction with Markov Models 1075
Michalis Vazirgiannis (INRIA Futurs),
Dimitris Drosos (Athens University of Economics and Business),
Pierre Senellart (INRIA Futurs & Université Paris-Sud),
Akrivi Vlachou (Athens University of Economics and Business)
Ajax for Mobility: MobileWeaver Ajax Framework 1077
Louenas Hamdi, Huaigu Wu (SAP Research, SAP Labs Canada),
Serhan Dagtas (University of Arkansas Little Rock),
Abdel Benharref (SAP Research, SAP Labs Canada)
CM-PMI: Improved Web-based Association Measure with Contextual Label Matching 1079
Xiaojun Wan (Peking University)
- Web User De-Identification in Personalization 1081
  Jiaqian Zheng, Jing Yao, Junyu Niu (Fudan University)
- A Systematic Approach for Cell-phone Worm Containment 1083
  Liang Xie, Hui Song, Trent Jaeger, Sencun Zhu (The Pennsylvania State University)
Information Retrieval and Knowledge Discovery on the Semantic Web of Traditional Chinese Medicine 1085
Zhaohui Wu, Tong Yu, Huajun Chen, Xiaohong Jiang, Yi Feng, Yuxin Mao, Heng Wang, Jingming Tang, Chunying Zhou (Zhejiang University)
Topigraphy: Visualization for Large-scale Tag Clouds 1087
Ko Fujimura, Shigeru Fujimura (NTT Cyber Solutions Laboratories),
Tatsushi Matsubayashi, Takeshi Yamada (NTT Communication Science Laboratories),
Hidenori Okuda (NTT Cyber Solutions Laboratories)
GSP-ExR: GSP Protocol with an Exclusive Right for Keyword Auctions 1089
Yuko Sakurai, Atsushi Iwasaki, Yasumasa Saito, Makoto Yokoo (Kyushu University)
Finding Similar Pages in a Social Tagging Repository 1091
Alex Penev, Raymond K. Wong (NICTA and University of New South Wales)
FolksoViz: A Subsumption-based Folksonomy Visualization Using Wikipedia Texts 1093
Kangpyo Lee, Hyunwoo Kim, Chungsu Jang, Hyoung-Joo Kim (Seoul National University)
Size Matters: Word Count as a Measure of Quality on Wikipedia 1095
JoshuaE. Blumenstock (University of California at Berkeley)
Understanding Internet Video Sharing Site Workload: A View from Data Center Design 1097
Xiaozhu Kang (Columbia University),
Hui Zhang, Guofei Jiang, Haifeng Chen, Xiaoqiao Meng, Kenji Yoshihira (NEC Laboratories America)
Representing a Web Page as Sets of Named Entities of Multiple Types – A Model and Some Preliminary Applications 1099
Nan Di, Conglei Yao, Mengcheng Duan (Peking University),
Jonathan J. H. Zhu (City University of Hong Kong),
Xiaoming Li (Peking University)
Falcons: Searching and Browsing Entities on the Semantic Web 1101
Gong Cheng, Weiyi Ge, Yuzhong Qu (Southeast University)
Influencers and Their Barriers to Technology 1103
Ann Hsieh, Todd Hausman, Nerija Titus (Yahoo, Inc.)
A Semantic Layer for Publishing and Localizing XML Data for a P2P XQuery Mediator 1105
Florin Dragan, Georges Gardarin, Laurent Yeh (Université de Versailles Saint-Quentin-en-Yvelines)
Mining for Personal Name Aliases on the Web 1107
Danushka Bollegala, Taiki Honma, Yutaka Matsuo, Mitsuru Ishizuka (The University of Tokyo)
Application of Bitmap Index to Information Retrieval 1109
Kengo Fujioka, Yukio Uematsu, Makoto Onizuka (NTT CyberSpace Laboratories, NTT Corporation)
PivotBrowser: A Tag-Space Image Searching Prototype 1111
Xiaoyan Li, Lidan Shou, Gang Chen, Xiaolong Zhang, Tianlei Hu, Jinxiang Dong (Zhejiang University)
Measuring Extremal Dependencies in Web Graphs 1113
Yana Volkovich, Nelly Litvak (University of Twente),
Bert Zwart (Georgia Institute of Technology)
Determining User’s Interest in Real Time 1115
Sanasam Ranbir Singh, Hema A. Murthy, Timothy A. Gonsalves (Indian Institute of Technology Madras)
How to Influence My Customers? The Impact of Electronic Market Design 1117
Nan Hu (Singapore Management University),
Ling Liu (University of Texas at Dallas),
Bin Chen, Jialie Shen (Singapore Management University)
Improving Web Spam Detection with Re-Extracted Features 1119
Guang-Gang Geng, Chun-Heng Wang, Qiu-Dan Li (Chinese Academy of Sciences)
The World Wide Telecom Web Browser 1121
Sheetal Agarwal, Arun Kumar, Amit Anil Nanavati, Nitendra Rajput (IBM India Research Lab)
VoiKiosk: Increasing Reachability of Kiosks in Developing Regions 1123
Sheetal Agarwal, Arun Kumar, Amit Anil Nanavati, Nitendra Rajput (IBM India Research Lab)
Semantic Similarity Based on Compact Concept Ontology 1125
Ce Zhang, Yu-Jing Wang, Bin Cui (Peking University),
Gao Cong (Microsoft Research Asia)
Layman Tuning of Websites: Facing Change Resilience 1127
Oscar Díaz, Cristóbal Arellano, Jon Iturrioz (University of the Basque Country)
Model Bloggers’ Interests Based on Forgetting Mechanism 1129
Yuan Cheng, Guang Qiu, Jiajun Bu, Kangmiao Liu, Ye Han, Can Wang, Chun Chen (Zhejiang University)
Temporal Views Over RDF Data 1131
Geetha Manjunath, R. Badrinath, Craig Sayers, Venugopal K. S (Hewlett-Packard Company)
A Teapot Graph and Its Hierarchical Structure of the Chinese Web 1133
Jonathan J. H. Zhu (City University of Hong Kong),
Tao Meng, Zhengmao Xie, Geng Li, Xiaoming Li (Peking University)
Collaborative Filtering on Skewed Datasets 1135
Somnath Banerjee, Krishnan Ramanathan (Hewlett-Packard Laboratories)
2LIP: The Step Towards The Web3D 1137
Jacek Jankowski, Sebastian Ryszard Kruk (National University of Ireland)
Protecting Web Services from Remote Exploit code: A Static Analysis Approach 1139
Xinran Wang, Yoon-chan Jhi, Sencun Zhu, Peng Liu (Pennsylvania State University)
Composing and Optimizing Data Providing Web Services 1141
Mahmoud Barhamgi, Djamal Benslimane (Claude Bernard University),
Aris M. Ouksel (The University of Illinois)
- PSST: A Web-Based System for Tracking Political Statements 1143
  Samantha Kleinberg, Bud Mishra (New York University)
Exploiting Semantic Web Technologies to Model Web Form Interactions 1145
Wolfgang Holzinger, Bernhard Krüpl (TU Wien),
Robert Baumgartner (Lixto Software Gmbh)
GroupMe! — Where Information Meets 1147
Fabian Abel, Nicola Henze, Daniel Krause (Leibniz University Hannover)
Microscale Evolution of Web Pages 1149
Carrie Grimes, Sean O’Brien (Google)
Web Page Sectioning Using Regex-based Template 1151
Rupesh R. Mehta, Amit Madaan (Yahoo! R&D)
Towards a Programming Language for Services Computing 1153
Arun Kumar (IBM India Research Lab),
D Janakiram (Indian Institute of Technology Madras)
HisTrace: Building a Search Engine of Historical Events 1155
Lian’en Huang (Peking University),
Jonathan J. H. Zhu (City University of Hong Kong),
Xiaoming Li (Peking University)
Online Change Detection in Individual Web User Behaviour 1157
Peter I. Hofgesang, Jan Peter Patist (VU University Amsterdam)
WebAnywhere: Enabling a Screen Reading Interface for the Web on Any Computer 1159
Jeffrey P. Bigham, Craig M. Prince, Richard E. Ladner (University of Washington)
Guanxi in the Chinese Web – A Study of Mutual Linking 1161
Valerie King, Louis Lei Yu, Yan Zhuang (University of Victoria)
Towards Robust Trust Establishment in Web-Based Social Networks with SocialTrust 1163
James Caverlee (Texas A&M University),
Ling Liu, Steve Webb (Georgia Institute of Technology)
Plurality: A Context-Aware Personalized Tagging System 1165
Robert Graham, Brian Eoff, James Caverlee (Texas A&M University)
Web Graph Similarity for Anomaly Detection (Poster) 1167
Panagiotis Papadimitriou (Stanford University),
Ali Dasdan (Yahoo! Inc.),
Hector Garcia-Molina (Stanford University)
Static Query Result Caching Revisited 1169
Rifat Ozcan, Ismail Sengor Altingovde, Özgür Ulusoy (Bilkent University)
A Larger Scale Study of Robots.txt 1171
Santanu Kolay, Paolo D’Alberto, Ali Dasdan, Arnab Bhattacharjee (Yahoo! Inc.)
Defection Detection: Predicting Search Engine Switching 1173
Allison P. Heath (Rice University),
Ryen W. White (Microsoft Corporation)
Algorithm for Stochastic Multiple-Choice Knapsack Problem and Application to Keywords Bidding 1175
Yunhong Zhou (HP Labs),
Victor Naroditskiy (Brown University)
Simrank++: Query Rewriting through Link Analysis of the ClickGraph (Poster) 1177
Ioannis Antonellis, Hector Garcia-Molina (Stanford University),
Chi-Chao Chang (Yahoo!)
An Initial Investigation on Evaluating Semantic Web Instance Data 1179
Li Ding, Jiao Tao, Deborah L. McGuinness (Rensselaer Polytechnic Institute)
Mining Tag Clouds and Emoticons behind Community Feedback 1181
Kavita A. Ganesan, Neelakantan Sundaresan, Harshal Deo (eBay Inc)
Investigation of Partial Query Proximity in Web Search 1183
Jing Bai, Yi Chang, Hang Cui, Zhaohui Zheng, Gordon Sun, Xin Li (Yahoo! Inc.)
Identifying Regional Sensitive Queries in Web Search 1185
Srinivas, Ya Zhang, Belle Tseng, Gordon Sun, Xin Li (Yahoo! Inc.)
Offline Matching Approximation Algorithms in ExchangeMarkets 1187
Zeinab Abbassi, Laks V. S. Lakshmanan (University of British Columbia)
An Efficient Two-Phase Service Discovery Mechanism 1189
Shuiguang Deng, Zhaohui Wu, Jian Wu, Ying Li (Zhejiang University)
User Oriented Link Function Classification 1191
Mingliang Zhu, Weiming Hu, Ou Wu, Xi Li, Xiaoqin Zhang (Chinese Academy of Sciences)
Extraction and Mining of an Academic Social Network 1193
Jie Tang, Jing Zhang, Limin Yao, Juanzi Li (Tsinghua University)
Keyword Extraction for Contextual Advertisement 1195
Xiaoyuan Wu, Alvaro Bolivar (eBay Research Labs)
Which “Apple” Are You Talking About? 1197
Mandar A. Rahurkar, Dan Roth, Thomas S. Huang (University of Illinois)
Making BPEL Flexible – Adapting in the Context of Coordination Constraints Using WS-BPEL 1199
Yunzhou Wu, Prashant Doshi (University of Georgia)
Speeding Up Web Service Composition with Volatile External Information 1201
John F. Harney, Prashant Doshi (University of Georgia)
Context-Sensitive QoS Model: A Rule-Based Approach to Web Service Composition 1203
Tao Zhou, Xiaolin Zheng (Zhejiang University),
William Wei Song, Xiaofeng Du (Durham University),
Deren Chen (Zhejiang University)
A Unified Framework for Name Disambiguation 1205
Jie Tang, Jing Zhang (Tsinghua University),
Duo Zhang (University of Illinois at Urbana Champaign),
Juanzi Li (Tsinghua University)
Low-load Server Crawler: Design and Evaluation 1207
Katsuko T. Nakahira, Tetsuya Hoshino, Yoshiki Mikami (Nagaoka University of Technology)
KC3 Browser: Semantic Mash-up and Link-free Browsing 1209
Michiaki Iwazume, Ken Kaneiwa, Koji Zettsu, Takafumi Nakanishi, Yutaka Kidawara (National Institute of Information and Communication Technology),
Yssushi Kiyoki (Keio University)
Generating Hypotheses from the Web 1211
Wei Jin, Rohini Srihari, Abhishek Singh (State University of New York at Buffalo)
Using Graphics Processors for High-Performance IR Query Processing 1213
Shuai Ding, Jinru He, Hao Yan, Torsten Suel (Polytechnic University)
A Framework for Fast Community Extraction of Large-Scale Networks 1215
YutakaI. Leon-Suematsu, Kikuo Yuta (NiCT/ATR)
Enabling Secure Digital Marketplace 1217
Hongxia Jin, Vladimir Zbarsky (IBM Almaden Research Center)
Extracting XML Schema from Multiple Implicit XML Documents Based on Inductive Reasoning 1219
Masaya Eki, Tadachika Ozono, Toramatsu Shintani (Nagoya Institute of Technology)
Visualizing Historical Content of Web Pages 1221
Adam Jatowt (Kyoto University),
Yukiko Kawai (Kyoto Sangyo University),
Katsumi Tanaka (Kyoto University)
Integrating the IAC Neural Network in Ontology Mapping 1223
Ming Mao (SAP Research),
Yefei Peng (Yahoo!),
Michael Spring (University of Pittsburgh)
Fast Algorithms for Top-k Personalized PageRank Queries 1225
Manish Gupta, Amit Pathak, Soumen Chakrabarti (IIT Bombay)
Reasoning about Similarity Queries in Text Retrieval Tasks 1227
Xiaohui Yu, Yang Liu (York University)
Mashups for Semantic User Profiles 1229
Riddhiman Ghosh, Mohamed Dekhil (Hewlett-Packard Laboratories)
Using CEP Technology to Adapt Messages Exchanged by Web Services 1231
Yehia Taher (Claude Bernard Lyon1 University and University of Grenoble),
Marie-Christine Fauvet (University of Grenoble),
Marlon Dumas (University of Tartu),
Djamal Benslimane (Claude Bernard Lyon1 University)
Finding Core Members in Virtual Communities 1233
Haiqiang Chen, Xueqi Cheng, Yue Liu (Institute of Computing Technology)
Improving Personalized Services in Mobile Commerce by a Novel Multicriteria Rating Approach 1235
Qiudan Li, Chunheng Wang, Guanggang Geng (Chinese Academy of Sciences)
Automatic Web Image Selection with a Probabilistic Latent Topic Model 1237
Keiji Yanai (The University of Electro-Communications)
R-U-In? : Doing What You Like, With People Whom You Like 1239
Nilanjan Banerjee, Dipanjan Chakraborty, Koustuv Dasgupta, Sumit Mittal, Seema Nagar (IBM India Research Laboratory)
Behavioral Classification on the Click Graph 1241
Martin Szummer, Nick Craswell (Microsoft Research Cambridge)
Budget Constrained Bidding in Keyword Auctions and Online Knapsack Problems 1243
Yunhong Zhou (Hewlett-Packard Laboratories),
Deeparnab Chakrabarty (Georgia Institute of Technology),
Rajan Lukose (Hewlett-Packard Laboratories)
Social and Semantics Analysis Via Non-negative Matrix Factorization 1245
Zhi-li Wu, Chi-Wa Cheng, Chun-hung Li (Hong Kong Baptist University)
Incremental Web Page Template Detection 1247
Yu Wang, Bingxing Fang, Xueqi Cheng, Li Guo, Hongbo Xu (Chinese Academy of Sciences)
Rogue Access Point Detection Using Segmental TCP Jitter 1249
Gaogang Xie, Tingting He, Guangxing Zhang (Chinese Academy of Sciences)

Panel Sessions

Towards the Policy-Aware Web: The Real Web 3.0? 1251
Renato Iannella (NICTA),
Elisa Bertino (Purdue University),
Piero Bonatti (Universitá di Napoli Federico II),
Marco Casassa-Mont (Hewlett-Packard),
Lalana Kagal (Massachusetts Institute of Technology),
Irene Pollach (University of Aarhus),
Thomas Roessler (W3C)
Protecting the Web: Phishing, Malware, and Other Security Threats 1253
Greg Aaron (Afilias),
Katharine A. Bostik (Microsoft Corporation),
Rod Rasmussen (Internet Identity),
Edmon Chung (DotASIA Organisation)
The Future of Online Social Interactions: What to Expect in 2020 1255
Ajita John (Avaya Labs),
Lada Adamic (University of Michigan),
Marc Davis (Yahoo Inc.),
Frank Nack (University of Amsterdam),
David A. Shamma (Yahoo Inc.),
Doree D. Seligmann (Avaya Laboratories)
Information “Uptrieval”: Exploring Models for Content Assimilation and Aggregation for Developing Regions 1257
Sheetal K. Agarwal, Arun Kumar, Sougata Mukherjea, Amit Anil Nanavati, Nitendra Rajput (IBM India Research Lab)
Rich Media and Web 2.0 1259
Edward Chang (Google Research, China),
Ken Ong (Google Inc.),
Susanne Boll (University of Oldenburg),
Wei-Ying Ma (Microsoft Research, Asia)

Workshops

Location and the Web (LocWeb 2008) 1261
Susanne Boll (University of Oldenburg),
Christopher Jones (Cardiff University),
Eric Kansa (University of California, Berkeley),
Puneet Kishor (University of Wisconsin-Madison),
Mor Naaman (Yahoo! Inc.),
Ross Purves (University of Zurich),
Arno Scharl (MODUL University Vienna),
Erik Wilde (University of California, Berkeley)
International Workshop on Context-Enabled Source and Service Selection, Integration and Adaptation (CSSSIA 2008) 1263
Quan Z. Sheng (The University of Adelaide),
Ullas Nambiar (IBM India Research Lab),
Amit P. Sheth (Wright State University),
Biplav Srivastava (IBM India Research Lab),
Zakaria Maamar (Zayed University),
Said Elnaffar (UAE University)
Linked Data on the Web (LDOW2008) 1265
Christian Bizer (Freie Universität Berlin),
Tom Heath (Talis),
Kingsley Idehen (OpenLink Software),
Tim Berners-Lee (W3C)
- Fourth International Workshop on Adversarial Information Retrieval on the Web (AIRWeb 2008) 1267
  Carlos Castillo (Yahoo! Research),
  Kumar Chellapilla (Microsoft Live Labs),
  Dennis Fetterly (Microsoft Research)
First Workshop on Targeting and Ranking for Online Advertising 1269
Ewa Dominowska (Microsoft Corporation),
Vanja Josifovski (Yahoo! Research)
MobEA VI: Personal Rich Social Media 1271
Rittwik Jana (AT&T Labs Research),
Daniel Appelquist (Vodafone Group R&D),
Galit Zadok (MilkMore Ltd),
Bin Wei (AT&T Labs Research)
Report on Semantic Web for Health Care and Life Sciences Workshop 1273
Huajun Chen (Zhejiang University),
Kei Cheung (Yale University),
Michel Dumontier (Carleton University),
Eric Prud’hommeaux (World Wide Web Consortium),
Alan Ruttenberg (Science Commons),
Susie Stephens (Eli Lilly and Company),
Yimin Wang (University of Karlsruhe)
International Workshop on Question Answering on the Web (QAWeb2008) 1275
Liu Wenyin, Qing Li (City University of Hong Kong),
Xuedong Huang (Microsoft Corporation)
WWW 2008 Workshop: NLPIX2008 Summary 1277
Hiroshi Nakagawa (The University of Tokyo),
Kentaro Torisawa (Japan Advanced Institute of Science & Technology),
Marasu Kitsuregawa (The University of Tokyo)
WS10A – Workshop on Social Web and Knowledge Management (SWKM2008) 1279
Peter Dolog (Aalborg University),
Markus Kroetzsch (Universitaet Karlsruhe (TH)),
Sebastian Schaffert (Salzburg Research),
Denny Vrandecic (Universitaet Karlsruhe (TH))
WWW 2008 Workshop on Social Web Search and Mining 1281
Juanzi Li (Tsinghua University),
Gui-rong Xue (Shanghai Jiaotong University),
Jie Tang (Tsinghua University),
Ying Ding (University of Innsbruck)

Proceedings of the 17th International World Wide Web Conference(WWW2008)April 21-25, 2008Beijing, China