CEUR-WS.org/Vol-2936 - Working Notes of CLEF 2021 - Conference and Labs of the Evaluation Forum (CLEF-WN 2021)

CEUR-WS.org/Vol-2936 - Working Notes of CLEF 2021 - Conference and Labs of the Evaluation Forum (CLEF-WN 2021)
Vol-2936
urn:nbn:de:0074-2936-0
Copyright © 2021 for
the individual papers by the papers' authors.
Copyright ©
2021
for the volume
as a collection by its editors.
This volume and its papers are published under the
Creative Commons License Attribution 4.0 International
CC BY 4.0
CLEF-WN 2021
CLEF 2021 Working Notes
Proceedings of the Working Notes of CLEF 2021 - Conference and Labs of the Evaluation Forum
Bucharest, Romania
September 21st
to
24th, 2021
Edited by
Guglielmo Faggioli
, University of Padova, Department of Information Engineering, Via Gradenigo 6/b, Padova, Italy
Nicola Ferro
, University of Padova, Department of Information Engineering, Via Gradenigo 6/b, Padova, Italy
Alexis Joly
, University of Montpellier, LIRMM, Inria ZENITH team 161 rue Ada, 34095, Montpellier
Cedex 5, France
Maria Maistro
, University of Copenhagen, Department of Computer Science, Universitetsparken 1, 2100
København Ø, Denmark
Florina Piroi
, TU WIEN, Institute of Information Systems Engineering Favoritenstrasse 9-11/188, A-1040
Vienna, Austria
Table of Contents
Preface
Guglielmo Faggioli
Nicola Ferro
Alexis Joly
Maria Maistro
Florina Piroi
ARQMath: Answer Retrieval for Questions on Math
Overview of ARQMath-2 (2021): Second CLEF Lab on Answer Retrieval for Questions on
Math (Working Notes Version)
24
Behrooz Mansouri
Richard Zanibbi
Douglas W. Oard
Anurag Agarwal
XY-PHOC Symbol Location Embeddings for Math Formula Retrieval and Autocompletion
25
35
Robin Avenoso
Behrooz Mansouri
Richard Zanibbi
BERT-Based Embedding Model for Formula Retrieval
36
46
Pankaj Dadure
Partha Pakray
Sivaji Bandyopadhyay
DPRL Systems in the CLEF 2021 ARQMath Lab: Sentence-BERT for Answer Retrieval, Learning-to-Rank
for Formula Retrieval
47
62
Behrooz Mansouri
Douglas W. Oard
Richard Zanibbi
Dowsing for Answers to Math Questions: Ongoing Viability of Traditional MathIR
63
81
Yin Ki Ng
Dallas Fraser
Besat Kassaie
Frank Tompa
Ensembling Math Information Retrieval Systems: MIRMU and MSM at ARQMath 2021
82
106
Vít Novotný
Michal Štefánik
Dávid Lupták
Martin Geletka
Petr Zelina
Petr Sojka
TU_DBS in the ARQMath Lab 2021, CLEF
107
124
Anja Reusch
Maik Thiele
Wolfgang Lehner
Ranked List Fusion and Re-ranking with Pre-trained Transformers for ARQMath Lab
125
132
Shaurya Rohatgi
Jian Wu
C Lee Giles
Approach Zero and Anserini at the CLEF-2021 ARQMath Track: Applying Substructure Search
and BM25 on Operator Tree Path Tokens
133
156
Wei Zhong
Xinyu Zhang
Ji Xin
Richard Zanibbi
Jimmy Lin
BioASQ: Large-scale biomedical semantic indexing and question answering
Overview of BioASQ Tasks 9a, 9b and Synergy in CLEF2021
157
164
Anastasios Nentidis
Georgios Katsimpras
Eirini Vandorou
Anastasia Krithara
Georgios Paliouras
Overview of BioASQ 2021-MESINESP track. Evaluation of advance hierarchical classification
techniques for scientific literature, patents and clinical trials.
165
187
Luis Gasco
Anastasios Nentidis
Anastasia Krithara
Darryl Estrada-Zavala
Renato Toshiyuki Murasaki
Elena Primo-Peña
Cristina Bojo-Canales
Georgios Paliouras
Martin Krallinger
BioASQ Synergy: A strong and simple baseline rooted in relevance feedback
188
195
Tiago Almeida
Sérgio Matos
Universal Passage Weighting Mecanism (UPWM) in BioASQ 9b
196
212
Tiago Almeida
Sérgio Matos
Large Biomedical Question Answering Models with ALBERT and ELECTRA
213
220
Sultan Alrowili
Vijay Shanker
Vicomtech at MESINESP2: BERT-based Multi-label Classification Models for Biomedical
Text Indexing
221
230
Aitor García-Pablos
Naiara Perez
Montse Cuadros
MDS_UNCC Question Answering System for Biomedical Data with Preliminary Error Analysis
231
240
Seethalakshmi Gopalakrishnan
Swathi Padithala
Hilmi Demirhan
Wlodek Zadrozny
PIDNA at BioASQ MESINESP: Hybrid Semantic Indexing for Biomedical Articles in Spanish
241
246
Yi Huang
Buse Giledereli
Abdullatif Koksal
Arzucan Ozgur
Elif Ozkirimli
Transformer-based Language Models for Factoid Question Answering at BioASQ9b
247
257
Urvashi Khanna
Diego Molla
Post-processing BioBERT And Using Voting Methods for Biomedical Question Answering
258
273
Margarida M. Campos
Francisco M. Couto
Query-Focused Extractive Summarisation for Finding Ideal Answers to Biomedical and
COVID-19 Questions
274
285
Diego Molla
Urvashi Khanna
Dima Galat
Vincent Nguyen
Maciej Rybinski
End-to-end Biomedical Question Answering via Bio-AnswerFinder and Discriminative Language
Representation Models
286
301
Ibrahim Burak Ozyurt
A Neural Text Ranking Approach for Automatic MeSH Indexing
302
312
Alastair Rae
James Mork
Dina Demner-Fushman
COLE and LYS at BioASQ MESINESP Task: large scale multilabel text categorization with
sparse and dense indices
313
323
Francisco J. Ribadas-Pena
Shuyuan Cao
Elmurod Kuriyozov
LASIGE-BioTM at MESINESP2: entity linking with semantic similarity and extreme multi-label
classification on Spanish biomedical documents
324
334
Pedro Ruas
Vitor D. T. Andrade
Francisco M. Couto
NLM at BioASQ Synergy 2021: Deep Learning-based Methods for Biomedical Semantic Question
Answering about COVID-19
335
350
Mourad Sarrouti
Deepak Gupta
Asma Ben Abacha
Dina Demner-Fushman
KU-DMIS at BioASQ 9: Data-centric and model-centric approaches for biomedical question
answering
351
359
Wonjin Yoon
Jaehyo Yoo
Sumin Seo
Mujeen Sung
Minbyul Jeong
Gangwoo Kim
Jaewoo Kang
NCU-IISR/AS-GIS: Results of Various Pre-trained Biomedical Language Models and Linear
Regression Model in BioASQ Task 9b Phase B
360
368
Yu Zhang
Jen-Chieh Han
Richard Tzong-Han Tsai
CheckThat!: Lab on Detecting Check-Worthy Claims, Previously Fact-Checked Claims, and Fake News
Overview of the CLEF-2021 CheckThat! Lab Task 1 on Check-Worthiness Estimation in
Tweets and Political Debates
369
392
Shaden Shaar
Maram Hasanain
Bayan Hamdan
Zien Sheikh Ali
Fatima Haouari
Alex Nikolov
Mucahid Kutlu
Yavuz Selim Kartal
Firoj Alam
Giovanni Da San Martino
Alberto Barrón-Cedeño
Ruben Miguez
Javier Beltrán
Tamer Elsayed
Preslav Nakov
Overview of the CLEF-2021 CheckThat! Lab Task 2 on Detecting Previously Fact-Checked
Claims in Tweets and Political Debates
393
405
Shaden Shaar
Fatima Haouari
Watheq Mansour
Maram Hasanain
Nikolay Babulkov
Firoj Alam
Giovanni Da San Martino
Tamer Elsayed
Preslav Nakov
Overview of the CLEF-2021 CheckThat! Lab: Task 3 on Fake News Detection
406
423
Gautam Kishore Shahi
Julia Maria Struß
Thomas Mandl
QMUL-SDS at CheckThat! 2021: Enriching Pre-Trained Language Models for the Estimation
of Check-Worthiness of Arabic Tweets
424
429
Amani S. Abumansour
Arkaitz Zubiaga
SCUoL at CheckThat! 2021: An AraBERT Model for Check-Worthiness of Arabic Tweets
430
434
Saud Althabiti
Mohammad Alsalka
Eric Atwell
M82B at CheckThat! 2021: Multiclass Fake News Detection Using BiLSTM
435
445
Sohel Siddique Ashik
Abdur Rahman Apu
Nusrat Jahan Marjana
Md. Sanzidul Islam
Md. Arid Hassan
CIC at CheckThat! 2021: Fake News detection Using Machine Learning And Data Augmentation
446
454
Noman Ashraf
Sabur Butt
Grigori Sidorov
Alexander Gelbukh
MUCIC at CheckThat! 2021: FaDo-Fake News Detection and Domain Identification using
Transformers Ensembling
455
464
Fazlourrahman Balouchzahi
Hosahalli Lakshmaiah Shashirekha
Grigori Sidorov
UPV at CheckThat! 2021: Mitigating Cultural Differences for Identifying Multilingual
Check-worthy Claims
465
475
Ipek Baris Schlicht
Angel Felipe Magnossão de Paula
Paolo Rosso
SU-NLP at CheckThat! 2021: Check-Worthiness of Turkish Tweets
476
483
Buse Carik
Reyyan Yeniterzi
Aschern at CLEF CheckThat! 2021: Lambda-Calculus of Fact-Checked Claims
484
493
Anton Chernyavskiy
Dmitry Ilvovsky
Preslav Nakov
UAICS at CheckThat! 2021: Fake news detection
494
507
Ciprian Gabriel Cusmuliuc
Matei Alexandru Amarandei
Ioana Pelin
Vlad-Iulian Cociorva
Adrian Iftene
University of Regensburg at CheckThat! 2021:Exploring Text Summarization for Fake
News Detection
508
519
Philipp Hartl
Udo Kruschwitz
CIVIC-UPM at CheckThat! 2021: Integration of Transformers in Misinformation Detection
and Topic Classification
520
530
Álvaro Huertas-García
Javier Huertas-Tato
Alejandro Martín
David Camacho
Classifier for fake news detection and Topical Domain of News Articles
531
536
William Kana Tsoplefack
Nkovachevich at CheckThat! 2021: BERT fine-tuning approach to fake news detection
537
544
Ninko Kovachevich
NLP&IR@UNED at CheckThat! 2021: Check-worthiness estimation and fake news detection
using transformer models
545
557
Juan R. Martinez-Rico
Juan Martinez-Romo
Lourdes Araujo
DIPS at CheckThat! 2021: Verified Claim Retrieval
558
571
Simona Mihaylova
Iva Borisova
Dzhovani Chemishanov
Preslav Hadzhitsanev
Momchil Hardalov
Preslav Nakov
NLytics at CheckThat! 2021: Multi-class fake news detection of news articles and domain
identification with RoBERTa - a baseline model
572
581
Albert Pritzkau
NLytics at CheckThat! 2021: Detecting Previously Fact-Checked Claims by Measuring
Semantic Similarity
582
591
Albert Pritzkau
NLytics at CheckThat! 2021: Check-Worthiness Estimation as a Regression Problem on
Transformers
592
602
Albert Pritzkau
NITK_NLP at CheckThat! 2021: Ensemble Transformer Model for Fake News Classification
603
611
Hariharan RamakrishnaIyer LekshmiAmmal
Anand Kumar Madasamy
Team Sigmoid at CheckThat!2021 Task 3a: Multiclass fake news detection with Machine
Learning
612
618
Abdullah Al Mamun Sardar
Shahalu Akter Salma
Md. Sanzidul Islam
Md. Arid Hasan
Touhid Bhuiyan
Qword at CheckThat! 2021: An Extreme Gradient Boosting Approach for Multiclass Fake
News Detection
619
627
Rudra Sarker Utsha
Mumenunnessa Keya
Md. Arid Hasan
Md. Sanzidul Islam
GPLSI team at CheckThat! 2021: Fine-tuning BETO and RoBERTa
628
638
Robiert Sepúlveda-Torres
Estela Saquete
BeaSku at CheckThat! 2021: Fine–Tuning Sentence BERT with Triplet Loss and Limited
Data
639
647
Beata Skuczyńska
Shaden Shaar
Jennifer Spenader
Preslav Nakov
BlackOps at CheckThat! 2021: User Profiles Analyze of Intelligent Detection on Fake
Tweets Notebook for PAN
648
658
S. M. Sohan
Sharun Akter Khusbu
Md. Sanzidul Islam
Md. Arid Hasan
Accenture at CheckThat! 2021: Interesting claim identification and ranking with contextually
sensitive lexical training data augmentation
659
669
Evan Williams
Paul Rodrigues
Sieu Tran
TOBB ETU at CheckThat! 2021: Data Engineering for Detecting Check-Worthy Claims
670
680
Muhammed Said Zengin
Yavuz Selim Kartal
Mucahid Kutlu
Fight for 4230 at CheckThat! 2021: Domain-Specific Preprocessing and Pretrained Model
for Ranking Claims by Check-Worthiness
681
692
Xinrui Zhou
Bohuai Wu
Pascale Fung
ChEMU: Cheminformatics Elsevier Melbourne University lab
Extended Overview of ChEMU 2021: Reaction Reference Resolution and Anaphora Resolution
in Chemical Patents
693
709
Yuan Li
Biaoyan Fang
Jiayuan He
Hiyori Yoshikawa
Saber A Akhondi
Christian Druckenbrodt
Camilo Thorne
Zubair Afzal
Zenan Zhai
Timothy Baldwin
Karin Verspoor
A pipelined approach to Anaphora Resolution in Chemical Patents
710
719
Ritam Dutt
Sopan Khosla
Carolyn Rose
HUKB at ChEMU 2021 Task 2: Anaphora Resolution
720
731
Kojiro Machi
Masaharu Yoshioka
eHealth: CLEFeHealth
Overview of CLEF eHealth Task 1 - SpRadIE: A challenge on information extraction from
Spanish Radiology Reports
732
750
Viviana Cotik
Laura Alonso Alemany
Darío Filippo
Franco Luque
Roland Roller
Jorge Vivaldi
Ammer Ayach
Fernando Carranza
Lucas Defrancesca
Antonella Dellanzo
Macarena Fernández Urquiza
Consumer Health Search at CLEF eHealth 2021
751
769
Lorraine Goeuriot
Hanna Suominen
Gabriella Pasi
Elias Bassani
Nicola Brew-Sam
Gabriela Nicole González Sáez
Liadh Kelly
Philippe Mulhem
Sandaru Seneviratne
Rishabh Upadhyay
Marco Viviani
Chenchen Xu
IMS-UNIPD @ CLEF eHealth Task 1: A Memory Based Reproducible Baseline
770
774
Giorgio Maria Di Nunzio
IMS-UNIPD @ CLEF eHealth Task 2: Reciprocal Ranking Fusion in CHS
775
779
Giorgio Maria Di Nunzio
Federica Vezzani
LSI_UNED at CLEF eHealth2021: Exploring the effects of transfer learning in negation
detection and entity recognition in clinical texts
780
793
Hermenegildo Fabregat
Andres Duque
Lourdes Araujo
Juan Martinez-Romo
Pre-trained language models to extract information from radiological reports
794
803
Pilar López-Úbeda
Manuel Carlos Díaz-Galiano
L. Alfonso Ureña-López
M. Teresa Martín-Valdivia
Extracting information from radiology reports by Natural Language Processing and Deep
Learning
804
817
Miguel Ángel Martín-Caro García-Largo
Isabel Segura-Bedmar
Comparing Transformer-based NER approaches for analysing textual medical diagnoses
818
833
Marco Polignano
Marco de Gemmis
Giovanni Semeraro
Information Extraction from Spanish Radiology Reports using multilingual BERT
834
845
Oswaldo Solarte-Pabón
Orlando Montenegro
Alberto Blazquez-Herranz
Hadi Saputro
Alejandro Rodriguez-González
Ernestina Menasalvas
A multi-BERT hybrid system for Named Entity Recognition in Spanish radiology reports
846
856
Víctor Suárez-Paniagua
Hang Dong
Arlene Casey
Learning to rank for Consumer Health Search
857
863
Hua Yang
Xiaoming Liu
Binbin Zheng
Guan Yang
eRisk: Early Risk Prediction on the Internet
Overview of eRisk at CLEF 2021: Early Risk Prediction on the Internet (Extended Overview)
864
887
Javier Parapar
Patricia Martín-Rodilla
David E. Losada
Fabio Crestani
Predicting Sign of Depression via Using Frozen Pre-trained Models and Random Forest
Classifier
888
896
Hassan Alhuzali
Tianlin Zhang
Sophia Ananiadou
VADER meets BERT: sentiment analysis for early detection of signs of self-harm through
social mining
897
907
Lucas Barros
Alina Trifan
José Luis Oliveira
UPV-Symanto at eRisk 2021: Mental Health Author Profiling for Early Risk Prediction
on the Internet
908
927
Angelo Basile
Mara Chinea-Rios
Ana-Sabina Uban
Thomas Müller
Luise Rössler
Seren Yenikent
Berta Chulví
Paolo Rosso
Marc Franco-Salvador
Exploring the Performance of Baseline Text Mining Frameworks for Early Prediction
of Self Harm Over Social Media
928
937
Tanmay Basu
Georgios V Gkoutos
Early Risk Detection of Pathological Gambling, Self-Harm and Depression Using BERT
938
949
Ana-Maria Bucur
Adrian Cosma
Liviu P. Dinu
NLP-UNED at eRisk 2021: self-harm early risk detection with TF-IDF and linguistic
features
950
965
Elena Campillo-Ageitos
Hermenegildo Fabregat
Lourdes Araujo
Juan Martinez-Romo
uOttawa at eRisk 2021: Automatic Filling of the Beck's Depression Inventory Questionnaire
using Deep Learning
966
980
Diana Inkpen
Ruba Skaik
Prasadith Buddhitha
Dimo Angelov
Maxwell Thomas Fredenburgh
CeDRI at eRisk 2021: A Naive Approach to Early Detection of Psychological Disorders
in Social Media
981
991
Rui Pedro Lopes
UNSL at eRisk 2021: A Comparison of Three Early Alert Policies for Early Risk Detection
992
1021
Juan Martín Loyola
Sergio Burdisso
Horacio Thompson
Leticia Cagnina
Marcelo Errecalde
UniOR NLP at eRisk 2021: Assessing the Severity of Depression with Part of Speech
and Syntactic Features
1022
1030
Raffaele Manna
Johanna Monti
Early Detection of Signs of Pathological Gambling, Self-Harm and Depression through
Topic Extraction and Neural Networks
1031
1045
Diego Maupomé
Maxime D. Armstrong
Fanny Rancourt
Thomas Soulas
Marie-Jean Meurs
Transfer Learning for Automated Responses to the BDI Questionnaire
1046
1058
Christoforos Spartalis
George Drosatos
Avi Arampatzis
Towards transfer learning using BERT for early detection of self-harm of social media
users
1059
1070
Qamar Un Nisa
Rafi Muhammad
A RoBERTa-based model on measuring the severity of the signs of depression
1071
1080
Shih-Hung Wu
Zhao-Jun Qiu
ImageCLEF: Multimedia Retrieval Challenge in CLEF
Overview of the VQA-Med Task at ImageCLEF 2021: Visual Question Answering and Generation
in the Medical Domain
1081
1088
Asma Ben Abacha
Mourad Sarrouti
Dina Demner-Fushman
Sadid A. Hasan
Henning Müller
Overview of ImageCLEFtuberculosis 2021 - CT-based Tuberculosis Type Classification
1089
1100
Serge Kozlovski
Vitali Liauchuk
Yashin Dicente Cid
Vassili Kovalev
Henning Müller
Overview of the ImageCLEFmed 2021 Concept & Caption Prediction Task
1101
1112
Obioma Pelka
Asma Ben Abacha
Alba Garcia Seco de Herrera
Janadhip Jacutprakart
Christoph M. Friedrich
Henning Müller
Overview of ImageCLEFcoral 2021: Coral Reef Image Annotation of a 3D Environment
1113
1120
Jon Chamberlain
Alba García Seco De Herrera
Antonio Campello
Adrian Clark
Thomas Oliver
Hassan Moustahfid
Overview of the 2021 ImageCLEFdrawnUI Task: Detection and Recognition of Hand Drawn
and Digital Website UIs
1121
1132
Raul Berari
Andrei Tăuteanu
Dimitri Fichou
Paul Brie
Mihai Dogariu
Liviu-Daniel Ștefan
Mihai Gabriel Constantin
Bogdan Ionescu
Classification of Tuberculosis Type on CT Scans of Lungs using a fusion of 2D and
3D Deep Convolutional Neural Networks
1133
1144
Emad Aghajanzadeh
Behzad Shomali
Diba Aminshahidi
Navid Ghassemi
Simple Neural Network based TB Classification
1145
1150
Anirudh Anand
Karthik Raja Anandan
Bhuvana Jayaraman
Mirnalinee Thanga Nadar Thanga Thai
ImageCLEF 2021: Deep categorizing tuberculosis cases using normalization and pseudo-color
CT image
1151
1159
Tetsuya Asakawa
Riku Tsuneda
Kazuki Shimizu
Takuyuki Komoda
Masaki Aono
Attention-based CNN-GRU Model For Automatic Medical Images Captioning: ImageCLEF 2021
1160
1173
Djamila-Romaissa Beddiar
Mourad Oussalah
Tapio Seppänen
PUC Chile team at Caption Prediction: ResNet visual encoding and caption classification
with Parametric ReLU
1174
1183
Vicente Castro
Pablo Pino
Denis Parra
Hans Lobel
AUEB NLP Group at ImageCLEFmed Caption Tasks 2021
1184
1200
Foivos Charalampakos
Vasilis Karatzas
Vasiliki Kougia
John Pavlopoulos
Ion Androutsopoulos
Chabbiimen at VQA-Med 2021: Visual Generation of Relevant Natural Language Questions
from Radiology Images for Anomaly Detection
1201
1210
Imen Chebbi
TeamS at VQA-Med 2021: BBN-Orchestra for Long-tailed Medical Visual Question Answering
1211
1217
Sedigheh Eslami
Gerard de Melo
Christoph Meinel
SYSU-HCP at VQA-Med 2021: A Data-centric Model with Efficient Training Methodology
for Medical Visual Question Answering
1218
1228
Haifan Gong
Ricong Huang
Guanqi Chen
Guanbin Li
A Convolutional Neural Networks based Coral Reef Annotation and Localization
1229
1238
Rohit Gunti
Abebe Rorissa
UI element detection from wireframe drawings of websites
1239
1252
Prasang Gupta
Vishakha Bansal
UAIC2021: Lung Analysis for Tuberculosis Classification
1253
1263
Alexandra Hanganu
Cristian Simionescu
Lucia-Georgiana Coca
Adrian Iftene
NLIP-Essex-ITESM at ImageCLEFcaption 2021 task : Deep Learning-based Information Retrieval
and Multi-label Classification towards improving Medical Image Understanding
1264
1274
Janadhip Jacutprakart
Francisco Parrilla Andrade
Rodolfo Cuan
Arely Aceves Compean
Giorgos Papanastasiou
Alba Garcia Seco de Herrera
Lijie at ImageCLEFmed VQA-Med 2021: Attention Model-based Efficient Interaction between
Multimodality
1275
1284
Jie Li
Shengyan Liu
Lijie at ImageCLEFmed Tuberculosis 2021: EfficientNet Simplified Tuberculosis Case
Classification
1285
1294
Jie Li
Li Yang
Yang Bai
TAM at VQA-Med 2021: A Hybrid Model with Feature Extraction and Fusion for Medical
Visual Question Answering
1295
1304
Yong Li
Zhenguo Yang
Tianyong Hao
Multi-Classification Study of the Tuberculosis with 3D CBAM-ResNet and EfficientNet
1305
1309
Xing Lu
Eric Y Chang
Chun-Nan Hsu
Jiang Du
Amilcare Gentili
Identifying tuberculosis type in CTs
1310
1316
Cosmin Moisii
Radu Miron
Mihaela Breaban
AEHRC CSIRO at ImageCLEFmed Caption 2021
1317
1328
Aaron Nicolson
Jason Dowling
Bevan Koopman
SSN MLRG at VQA-MED 2021: An Approach for VQA to Solve Abnormality Related Queries
using Improved Datasets
1329
1335
Noor Mohamed Sheerin Sitara
Srinivasan Kavitha
PUC Chile team at TBT Task: Diagnosis of Tuberculosis Type using segmented CT scans
1336
1345
José Miguel Quintana
Daniel Florea
Ria Deane
Denis Parra
Pablo Pino
Pablo Messina
Hans Löbel
PUC Chile team at VQA-Med 2021: approaching VQA as a classification task via fine-tuning
a pretrained CNN
1346
1351
Ricardo Schilling
Pablo Messina
Denis Parra
Hans Löbel
PUC Chile team at Concept Detection: K Nearest Neighbors with Perceptual Similarity
1352
1358
Gregory Schuit
Vicente Castro
Pablo Pino
Denis Parra
Hans Lobel
Automatic Coral Reef Annotation, Localization and Pixel-wise Parsing Using Mask R-CNN
1359
1364
Lukáš Soukup
Kdelab at ImageCLEF 2021: Medical Caption Prediction with Effective Data Pre-processing
and Deep Learning
1365
1374
Riku Tsuneda
Tetsuya Asakawa
Masaki Aono
Improving web user interface element detection using Faster R-CNN
1375
1386
Jiří Vyskočil
Lukáš Picek
ImageSem Group at ImageCLEFmed Caption 2021 Task: Exploring the Clinical Significance
of the Textual Descriptions Derived from Medical Images
1387
1393
Xuwen Wang
Zhen Guo
Chunyuan Xu
Lianglong Sun
Jiao Li
Pixelwise annotation of coral reef substrates
1394
1404
Jessica Wright
Ioana-Lia Palosanu
Louis Clift
Alba García Seco de Herrera
Jon Chamberlain
Yunnan University at VQA-Med 2021: Pretrained BioBERT for Medical Domain Visual Question
Answering
1405
1411
Qian Xiao
Xiaobing Zhou
Ya Xiao
Kun Zhao
ViPTT-Net: Video pretraining of spatio-temporal model for tuberculosis type classification
from chest CT scans
1412
1421
Hasib Zunair
Aimon Rahman
Nabeel Mohammed
LifeCLEF: Multimedia Life Species Identification
Overview of PlantCLEF 2021: cross-domain plant identification
1422
1436
Hervé Goëau
Pierre Bonnet
Alexis Joly
Overview of BirdCLEF 2021: Bird call identification in soundscape recordings
1437
1450
Stefan Kahl
Tom Denton
Holger Klinck
Hervé Glotin
Hervé Goëau
Willem-Pier Vellinga
Robert Planqué
Alexis Joly
Overview of GeoLifeCLEF 2021: Predicting species distribution from 2 million remote
sensing images
1451
1462
Titouan Lorieul
Elijah Cole
Benjamin Deneu
Maximilien Servajean
Pierre Bonnet
Alexis Joly
Overview of SnakeCLEF 2021: Automatic Snake Species Identification with Country-Level
Focus
1463
1476
Lukáš Picek
Andrew Durso
Isabelle Bolon
Rafael Ruiz de Castaneda
EfficientNets and Vision Transformers for Snake Species Identification Using Image
and Location Information
1477
1498
Louise Bloch
Christoph M. Friedrich
Incorporation of object detection models and location data into snake species classification
1499
1511
Regő Borsodi
Dávid Papp
A Deep Learning Method for Visual Recognition of Snake Species
1512
1525
Rail Chamidullin
Milan Šulc
Jiří Matas
Lukáš Picek
Improved Herbarium-Field Triplet Network for Cross-Domain Plant Identification: NEUON
Submission to LifeCLEF 2021 Plant
1526
1539
Sophia Chulif
Yang Loong Chang
UAIC-AI at SnakeCLEF 2021: Impact of convolutions in snake species recognition
1540
1546
Lucia Georgiana Coca
Alexia Theodora Popa
Razvan Contantin Croitoru
Luciana Paraschiva Bejan
Adrian Iftene
Weakly-Supervised Classification and Detection of Bird Sounds in the Wild. A BirdCLEF
2021 Solution
1547
1558
Marcos V. Conde
Kumar Shubham
Prateek Agnihotri
Nitin D. Movva
Szilard Bessenyei
Bird-Species Audio Identification, Ensembling 1D + 2D Signals
1559
1570
Gyanendra Das
Saksham Aggarwal
Snake Species Classification using Transfer Learning Technique
1571
1578
Karthik Desingu
Mirunalini Palaniappan
Jitesh Kumar
Recognizing bird species in diverse soundscapes under weak supervision
1579
1586
Christof Henkel
Pascal Pfeiffer
Philipp Singer
Automatic Snake Classification using Deep Learning Algorithm
1587
1596
Lekshmi Kalinathan
Prabavathy Balasundaram
Pradeep Ganesh
Sandeep Sekhar Bathala
Rahul Kumar Mukesh
Birdcall Identification Using CNN and Gradient Boosting Decision Trees with Weak and
Noisy Supervision
1597
1608
Naoki Murakami
Hajime Tanaka
Masataka Nishimori
STFT Transformers for Bird Song Recognition
1609
1616
Jean-Francois Puget
TUC Media Computing at BIRDCLEF 2021: Noise augmentation strategies in bird sound classification
in combination with DenseNets and ResNets
1617
1626
Arunodhayan Sampathkumar
Danny Kowerko
Learning to Monitor Birdcalls From Weakly-Labeled Focused Recordings
1627
1638
Jan Schlüter
Contrastive Representation Learning for Natural World Imagery: Habitat prediction
for 30,000 species
1639
1648
Sachith Seneviratne
BirdCLEF 2021: building a birdcall segmentation model based on weak labels
1649
1658
Maxim Shugaev
Naoya Tanahashi
Philip Dhingra
Urvish Patel
Weighted Pseudo Labeling Refinement for Plant Identification
1659
1667
Youshan Zhang
Brian Davison
LiLAS: Living Labs for Academic Search
Overview of LiLAS 2021 – Living Labs for Academic Search (Extended Overview)
1668
1699
Philipp Schaer
Timo Breuer
Leyla Jael Castro
Benjamin Wolff
Johann Schaible
Narges Tavakolpoursaleh
TEKMA at CLEF-2021: BM-25 based rankings for scientific publication retrieval and
data set recommendation
1700
1711
Jüri Keller
Leon Paul Mondrian Munz
PyTerrier-based Research Data Recommendations for Scientific Articles in the Social
Sciences
1712
1722
Narges Tavakolpoursaleh
Johann Schaible
Ad-hoc Retrieval of scientific Documents on the LIVIVO Search Portal
1723
1742
Anh Huy Matthias Tran
Andreas Kruff
Joshua Thos
Constantin Krah
Michelle Reiners
Fabian Ax
Saskia Brech
Sascha Gharib
Verena Pawlas
PAN: Lab on Digital Text Forensics and Stylometry
Overview of the Cross-Domain Authorship Verification Task at PAN 2021
1743
1759
Mike Kestemont
Enrique Manjavacas
Ilia Markov
Janek Bevendorff
Matti Wiegmann
Efstathios Stamatatos
Benno Stein
Martin Potthast
Overview of the Style Change Detection Task at PAN 2021
1760
1771
Eva Zangerle
Maximilian Mayerl
Martin Potthast
Benno Stein
Profiling Hate Speech Spreaders on Twitter Task at PAN 2021
1772
1789
Francisco Rangel
Gretel Liz De La Peña Sarracén
Berta Chulvi
Elisabetta Fersini
Paolo Rosso
Profiling Hate Spreaders using word N-grams
1790
1795
Jorge Alcañiz
José Andrés
Profiling Hate Speech Spreaders by Classifying Micro Texts Using BERT Model
1796
1800
Esam Alzahrani
Leon Jololian
Profiling Hate Speech Spreaders on Twitter
1801
1807
Àngel Andújar Carracedo
Raquel Jiménez Mondéjar
Identify Hate Speech Spreaders on Twitter using Transformer Embeddings Features and
AutoML Classifiers
1808
1812
Talha Anwar
Profiling Haters on Twitter using Statistical and Contextualized Embeddings
1813
1821
Hamed Babaei Giglou
Taher Rahgooy
Jafar Razmara
Mostafa Rahgouy
Zahra Rahgooy
Profiling Spreaders of Hate Speech with N-grams and RoBERTa
1822
1828
Christopher Bagdon
HSSD: Hate Speech Spreader Detection using N-grams and Voting Classifier
1829
1836
Fazlourrahman Balouchzahi
Shashirekha Hosahalli Lakshmaiah
Grigori Sidorov
Unified and Multilingual Author Profiling for Detecting Haters
1837
1845
Ipek Baris Schlicht
Angel Felipe Magnossão de Paula
O2D2: Out-Of-Distribution Detector to Capture Undecidable Trials in Authorship Verification
1846
1857
Benedikt Bönninghoff
Robert Nickel
Dorothea Kolossa
INFOTEC-LaBD at PAN@CLEF21: Profiling Hate Speech Spreaders on Twitter through Emotion-based
Representations
1858
1870
Hiram Cabrera
Sabino Miranda
Eric Tellez
Exploiting Contextualized Word Representations to Profile Haters on Twitter
1871
1882
Tanise Ceron
Camilla Casula
Use of Lexical and Psycho-Emotional Information to Detect Hate Speech Spreaders on
Twitter - Notebook for PAN at CLEF 2021
1883
1891
Riccardo Cervero
Profiling Hate Speech Spreaders on Twitter
1892
1898
Kumar Gourav Das
Buddhadeb Garai
Srijan Das
Braja Gopal Patra
Style Change Detection on Real-World Data using an LSTM-powered Attribution Algorithm
1899
1909
Robert Deibel
Denise Loefflad
Detection of Hate Speech Spreaders with BERT
1910
1919
David Dukić
Ana Sović Kržić
Graph-based Siamese Network for Authorship Verification
1920
1930
Daniel Embarcadero-Ruiz
Helena Gómez-Adorno
Ivan Reyes-Hernández
Alexis García
Alberto Embarcadero-Ruiz
Profiling Hate Speech Spreaders using Characters andWords N-grams
1931
1936
Daniel Espinosa
Grigori Sidorov
Hate speech spreader detection using contextualized word embeddings
1937
1944
Evgeny Finogeev
Mariam Kaprielova
Artem Chashchin
Kirill Grashchenkov
George Gorbachev
Oleg Bakhteev
Author classification as pre-training for pairwise authorship verification
1945
1952
Romain Futrzynski
Profiling Hate Speech Spreaders on Twitter using stylistic features and word embeddings
1953
1962
Lucía Gómez Zaragozá
Sara Hinojosa Pinto
Profiling Hate Speech Spreaders on Twitter: Transformers and mixed pooling
1963
1975
Álvaro Huertas-García
Javier Huertas-Tato
Alejandro Martín
David Camacho
Effective Detection of Hate Speech Spreaders on Twitter
1976
1986
Julian Höllig
Yeong Su Lee
Nina Seemann
Michaela Geierhos
UniNE at PAN-CLEF 2021
1987
1994
Catherine Ikae
UniNE at PAN-CLEF 2021: Authorship Verification
1995
2003
Catherine Ikae
Early Detection of Online Hate Speech Spreaders with Learned User Representations
2004
2010
Darius Irani
Avyakta Wrat
Silvio Amir
Profiling Hate Speech Spreaders on Twitter
2011
2024
Rakshita Jain
Devanshi Goel
Prashant Sahu
Abhinav Kumar
Jyoti Prakash Singh
Using N-grams and Statistical Features to Identify Hate Speech Spreaders on Twitter
2025
2034
Eszter Katona
Jakab Buda
Flora Bolonyai
Deep Modeling of Latent Representations for Twitter Profiles on Hate Speech Spreaders
Identification. Notebook for PAN at CLEF 2021
2035
2046
Roberto Labadie
Daniel Castro-Castro
Reynier Ortega Bueno
HaMor at the Profiling Hate Speech Spreaders on Twitter
2047
2055
Mirko Lai
Marco Antonio Stranisci
Cristina Bosco
Rossana Damiano
Viviana Patti
Authorship Verification based on Lucene architecture
2056
2059
Zhihao Liao
Yong Han
Leilei Kong
Zhuopeng Hong
Zijian Li
Guiyuan Liang
Zhenwei Mo
Zhixian Li
Zhongyuan Han
Hate Speech Detection on Twitter
2060
2063
Carolina Martin del Campo Rodriguez
Grigori Sidorov
Ildar Batyrshin
Authorship Verification with neural networks via stylometric feature concatenation
2064
2068
Antonio Menta
Ana Garcia-Serrano
Dual Neural Network Classification Based on BERT Feature Extraction for Authorship
Verification
2069
2072
Xiaogang Miao
Haoliang Qi
Zhijie Zhang
Guiyuan Cao
Ruilan Lin
Wenbin Lin
Style change detection using Siamese neural networks
2073
2082
Sukanya Nath
University of Regensburg @ PAN: Profiling Hate Speech Spreaders on Twitter
2083
2089
Kwabena Odame Akomeah
Udo Kruschwitz
Bernd Ludwig
Local Classification with Recurrent Neural Network for Profiling Hate Speech
Spreaders on Twitter. Notebook for PAN at CLEF 2021
2090
2102
Pablo Pallarés
Carlos Herrero
Encoding Text Information By Pre-trained Model For Authorship Verification
2103
2107
Zeyang Peng
Leilei Kong
Zhijie Zhang
Zhongyuan Han
Xu Sun
Feature Similarity-based Regression Models for Authorship Verification
2108
2117
Marina Pinzhakova
Tom Yagel
Jakov Rabinovits
Phonetic Detection for Hate Speech Spreaders on Twitter
2118
2125
Edwin Puertas
Juan Carlos Martinez-Santos
Detection of hate speech spreaders using convolutional neural networks
2126
2136
Marco Siino
Elisa Di Nuovo
Ilenia Tinnirello
Marco La Cascia
Writing Style Change Detection on Multi-Author Documents
2137
2145
Rhia Singh
Janith Weerasinghe
Rachel Greenstadt
Multi-label Style Change Detection by Solving a Binary Classification Problem
2146
2157
Eivind Strøm
Multi-level stacked ensemble with sparse and dense features for hate speech detection
on Twitter
2158
2168
Darko Tosev
Sonja Gievska
Siamese Bert for Authorship Verification
2169
2177
Jacob Tyo
Bhuwan Dhingra
Zachary Lipton
Detecting Hate Speech Spreaders on Twitter using LSTM and BERT in English and Spanish
2178
2185
Moshe Uzan
Yaakov Hacohen-Kerner
Profiling Hate Speech Spreaders on Twitter: Exploiting Textual Analysis of Tweets
and Combination of Textual Representations
2186
2192
Claudio Moisés Valiense de Andrade
Marcos André Gonçalves
Profiling Hate Speech Spreaders on Twitter: SVM vs. Bi-LSTM
2193
2200
Inna Vogel
Meghana Meghana
Feature Vector Difference based Authorship Verification for Open-World Settings
2201
2207
Janith Weerasinghe
Rhia Singh
Rachel Greenstadt
Style Change Detection Based On Writing Style Similarity
2208
2211
Zhijie Zhang
Zhongyuan Han
Leilei Kong
Xiaogang Miao
Zeyang Peng
Jieming Zeng
Haojie Cao
Jinxi Zhang
Ziwei Xiao
Xuemei Peng
SimpleText: (Re)Telling right scientific stories to non-specialists via text simplification
Overview of SimpleText CLEF 2021 Workshop and Pilot Tasks
2212
2227
Liana Ermakova
Patrice Bellot
Pavel Braslavski
Jaap Kamps
Josiane Mothe
Diana Nurbakova
Irina Ovchinnikova
Eric Sanjuan
Overview of the SimpleText Workshop at INFORSID-2021: Scientific Text Simplification
and Popularization
2228
2232
Liana Ermakova
Josiane Mothe
Eric Sanjuan
Multimodal science communication: from documentary research to infographic via mind
mapping
2233
2236
Sílvia Araújo
Radia Hannachi
LIA@SimpleText2021: automatic query extraction from press outlets for mining related
readable passages in scientific literature
2237
2241
Malek Hajjem
Eric Sanjuan
What Science-Related Topics Need to Be Popularized? A Comparative Study
2242
2255
Irina Ovchinnikova
Diana Nurbakova
Liana Ermakova
Importance of Data and Controllability in Neural Text Simplification
2256
2257
Wei Xu
Touché: Argument Retrieval
Overview of Touché 2021: Argument Retrieval
2258
2284
Alexander Bondarenko
Lukas Gienapp
Maik Fröbe
Meriem Beloucif
Yamen Ajjour
Alexander Panchenko
Chris Biemann
Benno Stein
Henning Wachsmuth
Martin Potthast
Matthias Hagen
Exploring Argument Retrieval for Controversial Questions Using Retrieve and Re-rank
Pipelines
2285
2291
Raunak Agarwal
Andrei Koniaev
Robin Schaefer
Learning to Rank Arguments with Feature Selection
2292
2301
Christopher Akiki
Maik Fröbe
Matthias Hagen
Martin Potthast
Development of an IR System for Argument Search
2302
2318
Marco Alecci
Tommaso Baldo
Luca Martinelli
Elia Ziroldo
DistilBERT-based Argumentation Retrieval for Answering Comparative Questions
2319
2330
Alaa Alhamzeh
Mohamed Bouhaouel
Elöd Egyed-Zsigmond
Jelena Mitrović
Document retrieval task on controversial topic with Re-Ranking approach
2331
2353
Andrea Cassetta
Alberto Piva
Enrico Vicentini
Retrieving Comparative Arguments using Ensemble Methods and BERT
2354
2365
Viktoriia Chekalina
Alexander Panchenko
Quality-aware Argument Retrieval with Topical Clustering
2366
2373
Lukas Gienapp
Exploring BERT Synonyms and Quality Prediction for Argument Retrieval
2374
2388
Tommaso Green
Luca Moroldo
Alberto Valente
Touché Task 2: Comparative Argument Retrieval A document-based search engine for answering
comparative questions
2389
2402
Daniel Helmrich
Denis Streitmatter
Fionn Fuchs
Maximilian Heykeroth
Argument Retrieval for Comparative Questions based on independent features
2403
2416
Thi Kim Hanh Luu
Jan-Niklas Weder
Exploring Document Expansion for Argument Retrieval
2417
2422
Alina Mailach
Denise Arnold
Stefan Eysoldt
Simon Kleine
A Search Engine System for Touché Argument Retrieval task to answer Controversial
Questions
2423
2440
Edoardo Raimondi
Marco Alessio
Nicola Levorato
Team Skeletor at Touché 2021: Argument Retrieval and Visualization for Controversial
Questions
2441
2454
Kevin Ros
Carl Edwards
Heng Ji
Chengxiang Zhai
Thor at Touché 2021: Argument Retrieval for Comparative Questions
2455
2462
Ekaterina Shirshakova
Ahmad Wattar
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