Experimental IR Meets Multilinguality, Multimodality, and Interaction

This book constitutes the refereed proceedings of the 10th International Conference of the CLEF Association, CLEF 2019, held in Lugano, Switzerland, in September 2019.The conference has a clear focus on experimental information retrieval with special attention to the challenges of multimodality, multilinguality, and interactive search ranging from unstructured to semi structures and structured data. The 7 full papers and 8 short papers presented in this volume were carefully reviewed and selected from 30 submissions. This year, many contributions tackle the social networks with the detection of stances or early identi cation of depression signs on Twitter in a cross-lingual context.

Further this volume presents 7 "best of the labs" papers which were reviewed as a full paper submission with the same review criteria. The labs represented scientific challenges based on new data sets and real world problems in multimodal and multilingual information access. In addition to this, 9 benchmarking labs reported results of their yearlong activities in overview talks and lab sessions.

Inhalt

What Happened in CLEF... For a While?.- Crosslingual depression detection in Twitter using bilingual word alignments.- Studying the Variability of System Setting E ectiveness by Data Analytics and Visualization.- Stance Detection in Web and Social Media : A Comparative Study.- TwitCID: a Collection of Data Sets for Studies on Information Di usion on Social Networks.- Sonny, Cerca! Evaluating the Impact of Using a Vocal Assistant to Search at School.- Generating Cross-Domain Text Corpora from Social Media Comments.- E cient Answer-Annotation for Frequent Questions.- Improving Ranking for Systematic Reviews Using Query Adaptation.- Analyzing the adequacy of readability indicators to a non-English language.- How many labels? Determining the Number of Labels in Multi-Label Text Classi cation.- Using Audio Transformations to Improve Comprehension in Voice Question Answering.- A User Modeling Shared Challenge Proposal.- How Lexical Gold Standards Have E ects On The Usefulness Of Text Analysis Tools For Digital Scholarship.- Personality facets recognition from text.- Unsupervised System Combination for Set-based Retrieval with Expectation Maximization.- An Ensemble Approach to Cross-Domain Authorship Attribution.- Evaluation of Deep Species Distribution Models using Environment and Co-occurrences.- Interactive Learning-based Retrieval Technique for Visual Lifelogging.- An E ective Deep Transfer Learning and Information Fusion Framework for Medical Visual Question Answering.- Language Modeling in Temporal Mood Variation Models for Early Risk Detection on The Internet.- Medical Image Labeling and Semantic Understanding for Clinical Applications.- To Check or not to Check: Syntax, Semantics, and Context in the Language of Check-worthy Claims.- Overview of CENTRE@CLEF 2019: Sequel in the Systematic Reproducibility Realm.- Overview of the CLEF-2019 CheckThat!: Automatic Identi cation and Veri cation of Claims.- Overview of the CLEF eHealth Evaluation Lab 2019.- Overview of eRisk 2019: Early Risk Prediction on the Internet.- ImageCLEF 2019: Multimedia Retrieval in Medicine, Lifelogging, Security and Nature.- Overview of LifeCLEF 2019: Identi cation of Amazonian Plants, South & North American Birds, and Niche Prediction.- Overview of PAN 2019: Bots and Gender Pröling, Celebrity Pröling, Cross-domain Authorship Attribution and Style Change Detection.- Overview of the CLEF 2019 Personalised Information Retrieval Lab (PIR-CLEF 2019).- Overview of CLEF 2019 Lab ProtestNews: Extracting Protests from News in a Cross-context Setting.