Evaluation of multilingual and multi-modal information retrieval : 7th Workshop of the Cross-Language Evaluation Forum, CLEF 2006, Alicante, Spain, September 20-22, 2006 : revised selected papers

This book constitutes the thoroughly refereed postproceedings of the 7th Workshop of the Cross-Language Evaluation Forum, CLEF 2006, held in Alicante, Spain, September 20-22, 2006. The revised papers presented together with an introduction were carefully reviewed and selected for inclusion in the book. The papers are organized in topical sections on Multilingual Textual Document Retrieval, Domain-Specifig Information Retrieval, i-CLEF, QA@CLEF, ImageCLEF, CLSR, WebCLEF and GeoCLEF. Front Matter....Pages - What Happened in CLEF 2006....Pages 1-10 Scientific Data of an Evaluation Campaign: Do We Properly Deal with Them?....Pages 11-20 CLEF 2006: Ad Hoc Track Overview....Pages 21-34 Hindi, Telugu, Oromo, English CLIR Evaluation....Pages 35-42 Amharic-English Information Retrieval....Pages 43-50 The University of Lisbon at CLEF 2006 Ad-Hoc Task....Pages 51-56 Query and Document Translation for English-Indonesian Cross Language IR....Pages 57-61 Passage Retrieval vs. Document Retrieval in the CLEF 2006 Ad Hoc Monolingual Tasks with the IR-n System....Pages 62-65 The PUCRS NLP-Group Participation in CLEF2006: Information Retrieval Based on Linguistic Resources....Pages 66-73 NLP-Driven Constructive Learning for Filtering an IR Document Stream....Pages 74-82 ENSM-SE at CLEF 2006 : Fuzzy Proxmity Method with an Adhoc Influence Function....Pages 83-90 A Study on the Use of Stemming for Monolingual Ad-Hoc Portuguese Information Retrieval....Pages 91-98 Benefits of Resource-Based Stemming in Hungarian Information Retrieval....Pages 99-106 Statistical vs. Rule-Based Stemming for Monolingual French Retrieval....Pages 107-110 A First Approach to CLIR Using Character N -Grams Alignment....Pages 111-118 SINAI at CLEF 2006 Ad Hoc Robust Multilingual Track: Query Expansion Using the Google Search Engine....Pages 119-126 Robust Ad-Hoc Retrieval Experiments with French and English at the University of Hildesheim....Pages 127-128 Comparing the Robustness of Expansion Techniques and Retrieval Measures....Pages 129-136 Experiments with Monolingual, Bilingual, and Robust Retrieval....Pages 137-144 Local Query Expansion Using Terms Windows for Robust Retrieval....Pages 145-152 Dublin City University at CLEF 2006: Robust Cross Language Track....Pages 153-156 JHU/APL Ad Hoc Experiments at CLEF 2006....Pages 157-162 The Domain-Specific Track at CLEF 2006: Overview of Approaches, Results and Assessment....Pages 163-169 Reranking Documents with Antagonistic Terms....Pages 170-173 Domain Specific Retrieval: Back to Basics....Pages 174-177 Monolingual Retrieval Experiments with a Domain-Specific Document Corpus at the Chemnitz University of Technology....Pages 178-185 iCLEF 2006 Overview: Searching the Flickr WWW Photo-Sharing Repository....Pages 186-194 Are Users Willing to Search Cross-Language? An Experiment with the Flickr Image Sharing Repository....Pages 195-204 Providing Multilingual Access to FLICKR for Arabic Users....Pages 205-216 Trusting the Results in Cross-Lingual Keyword-Based Image Retrieval....Pages 217-222 Overview of the CLEF 2006 Multilingual Question Answering Track....Pages 223-256 Overview of the Answer Validation Exercise 2006....Pages 257-264 Overview of the WiQA Task at CLEF 2006....Pages 265-274 Re-ranking Passages with LSA in a Question Answering System....Pages 275-279 Question Types Specification for the Use of Specialized Patterns in Prodicos System....Pages 280-289 Answer Translation: An Alternative Approach to Cross-Lingual Question Answering....Pages 290-299 Priberam’s Question Answering System in a Cross-Language Environment....Pages 300-309 LCC’s PowerAnswer at QA@CLEF 2006....Pages 310-317 Using Syntactic Knowledge for QA....Pages 318-327 A Cross-Lingual German-English Framework for Open-Domain Question Answering....Pages 328-338 Cross Lingual Question Answering Using QRISTAL for CLEF 2006....Pages 339-350 CLEF2006 Question Answering Experiments at Tokyo Institute of Technology....Pages 351-361 Quartz: A Question Answering System for Dutch....Pages 362-371 Experiments on Applying a Text Summarization System for Question Answering....Pages 372-376 N -Gram vs. Keyword-Based Passage Retrieval for Question Answering....Pages 377-384 Cross-Lingual Romanian to English Question Answering at CLEF 2006....Pages 385-394 Finding Answers in the Œdipe System by Extracting and Applying Linguistic Patterns....Pages 395-404 Question Answering Beyond CLEF Document Collections....Pages 405-414 Using Machine Learning and Text Mining in Question Answering....Pages 415-423 Applying Dependency Trees and Term Density for Answer Selection Reinforcement....Pages 424-431 Interpretation and Normalization of Temporal Expressions for Question Answering....Pages 432-439 Relevance Measures for Question Answering, The LIA at QA@CLEF-2006....Pages 440-449 Monolingual and Cross–Lingual QA Using AliQAn and BRILI Systems for CLEF 2006....Pages 450-453 The Bilingual System MUSCLEF at QA@CLEF 2006....Pages 454-462 MIRACLE Experiments in QA@CLEF 2006 in Spanish: Main Task, Real-Time QA and Exploratory QA Using Wikipedia (WiQA)....Pages 463-472 A First Step to Address Biography Generation as an Iterative QA Task....Pages 473-482 The Effect of Entity Recognition on Answer Validation....Pages 483-489 A Knowledge-Based Textual Entailment Approach Applied to the AVE Task....Pages 490-493 Automatic Answer Validation Using COGEX....Pages 494-501 Paraphrase Substitution for Recognizing Textual Entailment....Pages 502-509 Experimenting a “General Purpose” Textual Entailment Learner in AVE....Pages 510-517 Answer Validation Through Robust Logical Inference....Pages 518-521 University of Alicante at QA@CLEF2006: Answer Validation Exercise....Pages 522-525 Towards Entailment-Based Question Answering: ITC-irst at CLEF 2006....Pages 526-536 Link-Based vs. Content-Based Retrieval for Question Answering Using Wikipedia....Pages 537-540 Identifying Novel Information Using Latent Semantic Analysis in the WiQA Task at CLEF 2006....Pages 541-549 A Bag-of-Words Based Ranking Method for the Wikipedia Question Answering Task....Pages 550-553 University of Alicante at WiQA 2006....Pages 554-560 A High Precision Information Retrieval Method for WiQA....Pages 561-568 QolA: Fostering Collaboration Within QA....Pages 569-578 Overview of the ImageCLEF 2006 Photographic Retrieval and Object Annotation Tasks....Pages 579-594 Overview of the ImageCLEFmed 2006 Medical Retrieval and Medical Annotation Tasks....Pages 595-608 Text Retrieval and Blind Feedback for the ImageCLEFphoto Task....Pages 609-612 Expanding Queries Through Word Sense Disambiguation....Pages 613-616 Using Visual Linkages for Multilingual Image Retrieval....Pages 617-624 Approaches of Using a Word-Image Ontology and an Annotated Image Corpus as Intermedia for Cross-Language Image Retrieval....Pages 625-632 Dublin City University at CLEF 2006: Experiments for the ImageCLEF Photo Collection Standard Ad Hoc Task....Pages 633-637 Image Classification with a Frequency–Based Information Retrieval Scheme for ImageCLEFmed 2006....Pages 638-643 Grayscale Radiograph Annotation Using Local Relational Features....Pages 644-651 MorphoSaurus in ImageCLEF 2006: The Effect of Subwords On Biomedical IR....Pages 652-659 Medical Image Retrieval and Automated Annotation: OHSU at ImageCLEF 2006....Pages 660-669 MedIC at ImageCLEF 2006: Automatic Image Categorization and Annotation Using Combined Visual Representations....Pages 670-677 Medical Image Annotation and Retrieval Using Visual Features....Pages 678-685 Baseline Results for the ImageCLEF 2006 Medical Automatic Annotation Task....Pages 686-689 A Refined SVM Applied in Medical Image Annotation....Pages 690-693 Inter-media Concept-Based Medical Image Indexing and Retrieval with UMLS at IPAL....Pages 694-701 UB at ImageCLEFmed 2006....Pages 702-705 Translation by Text Categorisation: Medical Image Retrieval in ImageCLEFmed 2006....Pages 706-710 Using Information Gain to Improve the ImageCLEF 2006 Collection....Pages 711-714 CINDI at ImageCLEF 2006: Image Retrieval & Annotation Tasks for the General Photographic and Medical Image Collections....Pages 715-724 Image Retrieval and Annotation Using Maximum Entropy....Pages 725-734 Inter-media Pseudo-relevance Feedback Application to ImageCLEF 2006 Photo Retrieval....Pages 735-738 ImageCLEF 2006 Experiments at the Chemnitz Technical University....Pages 739-743 Overview of the CLEF-2006 Cross-Language Speech Retrieval Track....Pages 744-758 Benefit of Proper Language Processing for Czech Speech Retrieval in the CL-SR Task at CLEF 2006....Pages 759-765 Applying Logic Forms and Statistical Methods to CL-SR Performance....Pages 766-769 XML Information Retrieval from Spoken Word Archives....Pages 770-777 Experiments for the Cross Language Speech Retrieval Task at CLEF 2006....Pages 778-785 CLEF-2006 CL-SR at Maryland: English and Czech....Pages 786-793 Dublin City University at CLEF 2006: Cross-Language Speech Retrieval (CL-SR) Experiments....Pages 794-802 Overview of WebCLEF 2006....Pages 803-819 Improving Web Pages Retrieval Using Combined Fields....Pages 820-825 A Penalisation-Based Ranking Approach for the Mixed Monolingual Task of WebCLEF 2006....Pages 826-829 Index Combinations and Query Reformulations for Mixed Monolingual Web Retrieval....Pages 830-833 Multilingual Web Retrieval Experiments with Field Specific Indexing Strategies for WebCLEF 2006 at the University of Hildesheim....Pages 834-837 Vocabulary Reduction and Text Enrichment at WebCLEF....Pages 838-843 Experiments with the 4 Query Sets of WebCLEF 2006....Pages 844-847 Applying Relevance Feedback for Retrieving Web-Page Retrieval....Pages 848-851 GeoCLEF 2006: The CLEF 2006 Cross-Language Geographic Information Retrieval Track Overview....Pages 852-876 MIRACLE’s Ad-Hoc and Geographical IR Approaches for CLEF 2006....Pages 877-880 GIR Experimentation....Pages 881-888 GIR with Geographic Query Expansion....Pages 889-892 Monolingual and Bilingual Experiments in GeoCLEF2006....Pages 893-900 Experiments on the Exclusion of Metonymic Location Names from GIR....Pages 901-904 The University of New South Wales at GeoCLEF 2006....Pages 905-912 GEOUJA System. The First Participation of the University of Jaén at GEOCLEF 2006....Pages 913-917 R2D2 at GeoCLEF 2006: A Combined Approach....Pages 918-925 MSRA Columbus at GeoCLEF 2006....Pages 926-929 Forostar: A System for GIR....Pages 930-937 NICTA I2D2 Group at GeoCLEF 2006....Pages 938-945 Blind Relevance Feedback and Named Entity Based Query Expansion for Geographic Retrieval at GeoCLEF 2006....Pages 946-953 A WordNet-Based Indexing Technique for Geographical Information Retrieval....Pages 954-957 University of Twente at GeoCLEF 2006: Geofiltered Document Retrieval....Pages 958-961 TALP at GeoCLEF 2006: Experiments Using JIRS and Lucene with the ADL Feature Type Thesaurus....Pages 962-969 GeoCLEF Text Retrieval and Manual Expansion Approaches....Pages 970-977 UB at GeoCLEF 2006....Pages 978-985 The University of Lisbon at GeoCLEF 2006....Pages 986-994 Back Matter....Pages -