Experimental IR Meets Multilinguality, Multimodality, and Interaction

What Happened in CLEF... For a While?.- Crosslingual depression detection in Twitter using bilingual word alignments.- Studying the Variability of System Setting Eectiveness 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 Diusion 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.- Ecient 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 Classication.- Using Audio Transformations to Improve Comprehension in Voice Question Answering.- A User Modeling Shared Challenge Proposal.- How Lexical Gold Standards Have Eects 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 Eective 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 Identication and Verication 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: Identication of Amazonian Plants, South & North American Birds, and Niche Prediction.- Overview of PAN 2019: Bots and Gender Proling, Celebrity Proling, 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.