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Advances in Information Retrieval - 33rd European Conference on IR Research, ECIR 2011, Dublin, Ireland, April 18-21, 2011. Proceedings

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IR Research: Systems, Interaction, Evaluation and Theories
Kalervo Järvelin

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Ad Retrieval Systems in vitro and in vivo: Knowledge-Based Approaches to Computational Advertising
Evgeniy Gabrilovich

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The Value of User Feedback
Thorsten Joachims

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Text Classification for a Large-Scale Taxonomy Using Dynamically Mixed Local and Global Models for a Node
Heung-Seon Oh | Yoonjung Choi | Sung-Hyon Myaeng

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User-Related Tag Expansion for Web Document Clustering
Peng Li | Bin Wang | Wei Jin | Yachao Cui

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A Comparative Experimental Assessment of a Threshold Selection Algorithm in Hierarchical Text Categorization
Andrea Addis | Giuliano Armano | Eloisa Vargiu

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Improving Tag-Based Recommendation by Topic Diversification
Christian Wartena | Martin Wibbels

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A Joint Model of Feature Mining and Sentiment Analysis for Product Review Rating
Jorge Carrillo de Albornoz | Laura Plaza | Pablo Gervás | Alberto Díaz

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Modeling Answerer Behavior in Collaborative Question Answering Systems
Qiaoling Liu | Eugene Agichtein

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Clash of the Typings - Finding Controversies and Children's Topics Within Queries
Karl Gyllstrom | Marie-Francine Moens

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Are Semantically Related Links More Effective for Retrieval?
Marijn Koolen | Jaap Kamps

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Caching for Realtime Search
Edward Bortnikov | Ronny Lempel | Kolman Vornovitsky

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Enhancing Deniability against Query-Logs
Avi Arampatzis | Pavlos S. Efraimidis | George Drosatos

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On the Contributions of Topics to System Evaluation
Stephen Robertson

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A Methodology for Evaluating Aggregated Search Results
Jaime Arguello | Fernando Diaz | Jamie Callan | Ben Carterette

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Design and Implementation of Relevance Assessments Using Crowdsourcing
Omar Alonso | Ricardo Baeza-Yates

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In Search of Quality in Crowdsourcing for Search Engine Evaluation
Gabriella Kazai

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Summarizing a Document Stream
Hiroya Takamura | Hikaru Yokono | Manabu Okumura

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A Link Prediction Approach to Recommendations in Large-Scale User-Generated Content Systems
Nitin Chiluka | Nazareno Andrade | Johan A. Pouwelse

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Topic Classification in Social Media Using Metadata from Hyperlinked Objects
Sheila Kinsella | Alexandre Passant | John G. Breslin

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Peddling or Creating? Investigating the Role of Twitter in News Reporting
Ilija Subasic | Bettina Berendt

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Latent Sentiment Model for Weakly-Supervised Cross-Lingual Sentiment Classification
Yulan He

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Fractional Similarity: Cross-Lingual Feature Selection for Search
Jagadeesh Jagarlamudi | Paul N. Bennett

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Is a Query Worth Translating: Ask the Users!
Ahmed Hefny | Kareem Darwish | Ali Alkahky

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Balancing Exploration and Exploitation in Learning to Rank Online
Katja Hofmann | Shimon Whiteson | Maarten de Rijke

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ReFER: Effective Relevance Feedback for Entity Ranking
Tereza Iofciu | Gianluca Demartini | Nick Craswell | Arjen P. de Vries

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The Limits of Retrieval Effectiveness
Ronan Cummins | Mounia Lalmas | Colm O'Riordan

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Learning Conditional Random Fields from Unaligned Data for Natural Language Understanding
Deyu Zhou | Yulan He

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Subspace Tracking for Latent Semantic Analysis
Radim Rehurek

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Text Retrieval Methods for Item Ranking in Collaborative Filtering
Alejandro Bellogín | Jun Wang | Pablo Castells

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Classifying with Co-stems - A New Representation for Information Filtering
Nedim Lipka | Benno Stein

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Interactive Trademark Image Retrieval by Fusing Semantic and Visual Content
Marçal Rusiñol | David Aldavert | Dimosthenis Karatzas | Ricardo Toledo | Josep Lladós

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Dynamic Two-Stage Image Retrieval from Large Multimodal Databases
Avi Arampatzis | Konstantinos Zagoris | Savvas A. Chatzichristofis

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Comparing Twitter and Traditional Media Using Topic Models
Wayne Xin Zhao | Jing Jiang | Jianshu Weng | Jing He | Ee-Peng Lim | Hongfei Yan | Xiaoming Li

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Exploiting Thread Structures to Improve Smoothing of Language Models for Forum Post Retrieval
Huizhong Duan | Chengxiang Zhai

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Incorporating Query Expansion and Quality Indicators in Searching Microblog Posts
Kamran Massoudi | Manos Tsagkias | Maarten de Rijke | Wouter Weerkamp

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Discovering Fine-Grained Sentiment with Latent Variable Structured Prediction Models
Oscar Täckström | Ryan T. McDonald

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Combining Global and Local Semantic Contexts for Improving Biomedical Information Retrieval
Duy Dinh | Lynda Tamine

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Smoothing Click Counts for Aggregated Vertical Search
Jangwon Seo | W. Bruce Croft | Kwang Hyun Kim | Joon Ho Lee

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Automatic People Tagging for Expertise Profiling in the Enterprise
Pavel Serdyukov | Mike Taylor | Vishwa Vinay | Matthew Richardson | Ryen W. White

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Text Classification: A Sequential Reading Approach
Gabriel Dulac-Arnold | Ludovic Denoyer | Patrick Gallinari

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Domain Adaptation for Text Categorization by Feature Labeling
Cristina Kadar | José Iria

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TEMPER: A Temporal Relevance Feedback Method
Mostafa Keikha | Shima Gerani | Fabio Crestani

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Terms of a Feather: Content-Based News Recommendation and Discovery Using Twitter
Owen Phelan | Kevin McCarthy | Mike Bennett | Barry Smyth

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Topical and Structural Linkage in Wikipedia
Kelly Y. Itakura | Charles L. A. Clarke | Shlomo Geva | Andrew Trotman | Wei Chi Huang

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An Analysis of Time-Instability in Web Search Results
Jin Young Kim | Vitor R. Carvalho

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Rules of Thumb for Information Acquisition from Large and Redundant Data
Wolfgang Gatterbauer

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Bringing Why-QA to Web Search
Suzan Verberne | Lou Boves | Wessel Kraaij

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The Power of Peers
Nick Craswell | Dennis Fetterly | Marc Najork

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Introducing the User-over-Ranking Hypothesis
Benno Stein | Matthias Hagen

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Second Chance: A Hybrid Approach for Dynamic Result Caching in Search Engines
Ismail Sengör Altingövde | Rifat Ozcan | Berkant Barla Cambazoglu | Özgür Ulusoy

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Learning Models for Ranking Aggregates
Craig Macdonald | Iadh Ounis

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Efficient Compressed Inverted Index Skipping for Disjunctive Text-Queries
Simon Jonassen | Svein Erik Bratsberg

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Within-Document Term-Based Index Pruning with Statistical Hypothesis Testing
Sree Lekha Thota | Ben Carterette

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SkipBlock: Self-indexing for Block-Based Inverted List
Stéphane Campinas | Renaud Delbru | Giovanni Tummarello

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Weight-Based Boosting Model for Cross-Domain Relevance Ranking Adaptation
Peng Cai | Wei Gao | Kam-Fai Wong | Aoying Zhou

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What Makes Re-finding Information Difficult? A Study of Email Re-finding
David Elsweiler | Mark Baillie | Ian Ruthven

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A User-Oriented Model for Expert Finding
Elena Smirnova | Krisztian Balog

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Simulating Simple and Fallible Relevance Feedback
Feza Baskaya | Heikki Keskustalo | Kalervo Järvelin

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AutoEval: An Evaluation Methodology for Evaluating Query Suggestions Using Query Logs
M-Dyaa Albakour | Udo Kruschwitz | Nikolaos Nanas | Yunhyong Kim | Dawei Song | Maria Fasli | Anne N. De Roeck

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To Seek, Perchance to Fail: Expressions of User Needs in Internet Video Search
Christoph Kofler | Martha A. Larson | Alan Hanjalic

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Passage Reranking for Question Answering Using Syntactic Structures and Answer Types
Elif Aktolga | James Allan | David A. Smith

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An Iterative Approach to Text Segmentation
Fei Song | William M. Darling | Adnan Duric | Fred W. Kroon

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Improving Query Focused Summarization Using Look-Ahead Strategy
Rama Badrinath | Suresh Venkatasubramaniyan | C. E. Veni Madhavan

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A Generalized Method for Word Sense Disambiguation Based on Wikipedia
Chenliang Li | Aixin Sun | Anwitaman Datta

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Representing Document Lengths with Identifiers
Raffaele Perego | Fabrizio Silvestri | Nicola Tonellotto

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Free-Text Search versus Complex Web Forms
Kien-Tsoi T. E. Tjin-Kam-Jet | Dolf Trieschnigg | Djoerd Hiemstra

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Multilingual Log Analysis: LogCLEF
Giorgio Maria Di Nunzio | Johannes Leveling | Thomas Mandl

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A Large-Scale System Evaluation on Component-Level
Jens Kürsten | Maximilian Eibl

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Should MT Systems Be Used as Black Boxes in CLIR?
Walid Magdy | Gareth J. F. Jones

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Video Retrieval Based on Words-of-Interest Selection
Lei Wang | Dawei Song | Eyad Elyan

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Classic Children's Literature - Difficult to Read?
Dolf Trieschnigg | Claudia Hauff

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Applying Machine Learning Diversity Metrics to Data Fusion in Information Retrieval
David Leonard | David Lillis | Lusheng Zhang | Fergus Toolan | Rem W. Collier | John Dunnion

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Reranking Collaborative Filtering with Multiple Self-contained Modalities
Yue Shi | Martha A. Larson | Alan Hanjalic

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How Far Are We in Trust-Aware Recommendation?
Yue Shi | Martha A. Larson | Alan Hanjalic

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Re-ranking for Multimedia Indexing and Retrieval
Bahjat Safadi | Georges Quénot

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Combining Query Translation Techniques to Improve Cross-Language Information Retrieval
Benjamin Herbert | György Szarvas | Iryna Gurevych

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Back to the Roots: Mean-Variance Analysis of Relevance Estimations
Guido Zuccon | Leif Azzopardi | Keith van Rijsbergen

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A Novel Re-ranking Approach Inspired by Quantum Measurement
Xiaozhao Zhao | Peng Zhang | Dawei Song | Yuexian Hou

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Simple vs. Sophisticated Approaches for Patent Prior-Art Search
Walid Magdy | Patrice Lopez | Gareth J. F. Jones

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Towards Quantum-Based DB+IR Processing Based on the Principle of Polyrepresentation
David Zellhöfer | Ingo Frommholz | Ingo Schmitt | Mounia Lalmas | Keith van Rijsbergen

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ATTention: Understanding Authors and Topics in Context of Temporal Evolution
Nasir Naveed | Sergej Sizov | Steffen Staab

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Role of Emotional Features in Collaborative Recommendation
Yashar Moshfeghi | Joemon M. Jose

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The Importance of the Depth for Text-Image Selection Strategy in Learning-To-Rank
David Buffoni | Sabrina Tollari | Patrick Gallinari

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Personal Blog Retrieval Using Opinion Features
Shima Gerani | Mostafa Keikha | Mark James Carman | Fabio Crestani

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Processing Queries in Session in a Quantum-Inspired IR Framework
Ingo Frommholz | Benjamin Piwowarski | Mounia Lalmas | Keith van Rijsbergen

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Towards Predicting Relevance Using a Quantum-Like Framework
Emanuele Di Buccio | Massimo Melucci | Dawei Song

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Fusion vs. Two-Stage for Multimodal Retrieval
Avi Arampatzis | Konstantinos Zagoris | Savvas A. Chatzichristofis

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Combination of Feature Selection Methods for Text Categorisation
Robert Neumayer | Rudolf Mayer | Kjetil Nørvåg

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Time-Surfer: Time-Based Graphical Access to Document Content
Hector Llorens | Estela Saquete | Borja Navarro | Robert J. Gaizauskas

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ARES: A Retrieval Engine Based on Sentiments - Sentiment-Based Search Result Annotation and Diversification
Gianluca Demartini

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Web Search Query Assistance Functionality for Young Audiences
Carsten Eickhoff | Tamara Polajnar | Karl Gyllstrom | Sergio Duarte Torres | Richard Glassey

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Conversation Retrieval from Twitter
Matteo Magnani | Danilo Montesi | Gabriele Nunziante | Luca Rossi

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Finding Useful Users on Twitter: Twittomender the Followee Recommender
John Hannon | Kevin McCarthy | Barry Smyth

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Visual Exploration of Health Information for Children
Frans van der Sluis | Sergio Duarte Torres | Djoerd Hiemstra | Betsy van Dijk | Frea Kruisinga