no code implementations • ACL (WOAH) 2021 • Alexandros Xenos, John Pavlopoulos, Ion Androutsopoulos
We introduce a new task, context-sensitivity estimation, which aims to identify posts whose perceived toxicity changes if the context (previous post) is also considered.
1 code implementation • ACL 2022 • John Pavlopoulos, Leo Laugier, Alexandros Xenos, Jeffrey Sorensen, Ion Androutsopoulos
We study the task of toxic spans detection, which concerns the detection of the spans that make a text toxic, when detecting such spans is possible.
no code implementations • COLING (LaTeCHCLfL, CLFL, LaTeCH) 2020 • Katerina Korre, John Pavlopoulos
ERRANT extracts the errors and classifies them into error types, in the form of an edit that can be used in the creation of GEC systems, as well as for grammatical error analysis.
no code implementations • ACL (WOAH) 2021 • Vasiliki Kougia, John Pavlopoulos
The Shared Task on Hateful Memes is a challenge that aims at the detection of hateful content in memes by inviting the implementation of systems that understand memes, potentially by combining image and textual information.
no code implementations • LREC 2022 • Katerina Korre, John Pavlopoulos
In addition, we provide an extended version of the Greek Learner Corpus (GLC), on which our model reaches up to 22. 76% F0. 5.
1 code implementation • LREC 2022 • Konstantina Liagkou, John Pavlopoulos, Ewa Machotka
In this paper, we explored a new analytical approach based on the macroanalysis of images facilitated by Natural Language Processing technologies.
no code implementations • LREC 2022 • John Pavlopoulos, Alexandros Xenos, Davide Picca
By estimating the fraction of annotators that found a verse as belonging to a specific sentiment class, we model the poem’s perceived sentiment as a multi-variate time series.
no code implementations • RANLP 2021 • Katerina Korre, Marita Chatzipanagiotou, John Pavlopoulos
In this paper, we introduce the Greek version of the automatic annotation tool ERRANT (Bryant et al., 2017), which we named ELERRANT.
1 code implementation • LREC 2022 • Paraskevi Platanou, John Pavlopoulos, Georgios Papaioannou
The overall aim of this paper is to assess HTR for old Greek manuscripts.
no code implementations • 16 Oct 2024 • Konstantinos Skianis, A. Seza Doğruöz, John Pavlopoulos
In mental health support, the early identification of linguistic markers associated with mental health conditions can provide valuable support to mental health professionals, and reduce long waiting times for patients.
no code implementations • 25 Sep 2024 • Konstantinos Skianis, John Pavlopoulos, A. Seza Doğruöz
Large Language Models (LLMs) are increasingly integrated into various medical fields, including mental health support systems.
1 code implementation • 19 Jul 2024 • Korbinian Randl, John Pavlopoulos, Aron Henriksson, Tony Lindgren
This paper investigates the reliability of explanations generated by large language models (LLMs) when prompted to explain their previous output.
1 code implementation • 13 Jul 2024 • Juli Bakagianni, Kanella Pouli, Maria Gavriilidou, John Pavlopoulos
By applying our method, we conducted a systematic literature review of Greek NLP from 2012 to 2022, providing a comprehensive overview of the current state and challenges of Greek NLP research.
1 code implementation • 20 Jun 2024 • Panagiotis Kaliosis, John Pavlopoulos, Foivos Charalampakos, Georgios Moschovis, Ion Androutsopoulos
The accuracy of a diagnostic text, however, strongly depends on how well the key medical conditions depicted in the images are expressed.
1 code implementation • 18 Mar 2024 • Korbinian Randl, John Pavlopoulos, Aron Henriksson, Tony Lindgren
Contaminated or adulterated food poses a substantial risk to human health.
1 code implementation • 11 Jan 2024 • John Pavlopoulos, Georgios Vardakas, Aristidis Likas
Silhouette coefficient is an established internal clustering evaluation measure that produces a score per data point, assessing the quality of its clustering assignment.
1 code implementation • 23 Oct 2022 • Konstantina Dritsa, Kaiti Thoma, John Pavlopoulos, Panos Louridas
Large, diachronic datasets of political discourse are hard to come across, especially for resource-lean languages such as Greek.
no code implementations • 13 Oct 2022 • John Pavlopoulos, Alv Romell, Jacob Curman, Olof Steinert, Tony Lindgren, Markus Borg
Automated fault diagnosis can facilitate diagnostics assistance, speedier troubleshooting, and better-organised logistics.
no code implementations • 10 Oct 2022 • Giorgio Ottolina, John Pavlopoulos
This study presents a new approach to metaphorical paraphrase generation by masking literal tokens of literal sentences and unmasking them with metaphorical language models.
no code implementations • 24 May 2022 • John Pavlopoulos, Vanessa Lislevand
The potential of the presented resources is investigated by detecting and studying the emotion of `disgust' in the Greek Parliament records.
2 code implementations • Nature 2022 • Yannis Assael, Thea Sommerschield, Brendan Shillingford, Mahyar Bordbar, John Pavlopoulos, Marita Chatzipanagiotou, Ion Androutsopoulos, Jonathan Prag, Nando de Freitas
Ithaca can attribute inscriptions to their original location with an accuracy of 71% and can date them to less than 30 years of their ground-truth ranges, redating key texts of Classical Athens and contributing to topical debates in ancient history.
Ranked #1 on Ancient Text Restoration on I.PHI
no code implementations • 19 Nov 2021 • Alexandros Xenos, John Pavlopoulos, Ion Androutsopoulos, Lucas Dixon, Jeffrey Sorensen, Leo Laugier
User posts whose perceived toxicity depends on the conversational context are rare in current toxicity detection datasets.
no code implementations • SEMEVAL 2021 • John Pavlopoulos, Jeffrey Sorensen, L{\'e}o Laugier, Ion Androutsopoulos
For the supervised sequence labeling approach and evaluation purposes, posts previously labeled as toxic were crowd-annotated for toxic spans.
1 code implementation • EACL 2021 • Leo Laugier, John Pavlopoulos, Jeffrey Sorensen, Lucas Dixon
Platforms that support online commentary, from social networks to news sites, are increasingly leveraging machine learning to assist their moderation efforts.
no code implementations • 18 Jan 2021 • John Pavlopoulos, Vasiliki Kougia, Ion Androutsopoulos, Dimitris Papamichail
Diagnostic Captioning (DC) concerns the automatic generation of a diagnostic text from a set of medical images of a patient collected during an examination.
no code implementations • 22 Jun 2020 • John Pavlopoulos, Panagiotis Papapetrou
We show that a neural language model can achieve as high as 51. 3% accuracy in radiology reports (one out of two words predicted correctly).
1 code implementation • 11 Jun 2020 • Vasiliki Kougia, John Pavlopoulos, Panagiotis Papapetrou, Max Gordon
This paper introduces RTEx, a novel methodology for a) ranking radiography exams based on their probability to contain an abnormality, b) generating abnormality tags for abnormal exams, and c) providing a diagnostic explanation in natural language for each abnormal exam.
1 code implementation • ACL 2020 • John Pavlopoulos, Jeffrey Sorensen, Lucas Dixon, Nithum Thain, Ion Androutsopoulos
Moderation is crucial to promoting healthy on-line discussions.
no code implementations • SEMEVAL 2019 • John Pavlopoulos, Nithum Thain, Lucas Dixon, Ion Androutsopoulos
This paper presents the application of two strong baseline systems for toxicity detection and evaluates their performance in identifying and categorizing offensive language in social media.
2 code implementations • WS 2019 • Vasiliki Kougia, John Pavlopoulos, Ion Androutsopoulos
Image captioning applied to biomedical images can assist and accelerate the diagnosis process followed by clinicians.
no code implementations • EMNLP 2017 • John Pavlopoulos, Prodromos Malakasiotis, Ion Androutsopoulos
Experimenting with a new dataset of 1. 6M user comments from a news portal and an existing dataset of 115K Wikipedia talk page comments, we show that an RNN operating on word embeddings outpeforms the previous state of the art in moderation, which used logistic regression or an MLP classifier with character or word n-grams.
no code implementations • WS 2017 • John Pavlopoulos, Prodromos Malakasiotis, Juli Bakagianni, Ion Androutsopoulos
Experimenting with a dataset of approximately 1. 6M user comments from a Greek news sports portal, we explore how a state of the art RNN-based moderation method can be improved by adding user embeddings, user type embeddings, user biases, or user type biases.
no code implementations • WS 2017 • John Pavlopoulos, Prodromos Malakasiotis, Ion Androutsopoulos
We also compare against a CNN and a word-list baseline, considering both fully automatic and semi-automatic moderation.
no code implementations • SEMEVAL 2016 • Dionysios Xenos, Panagiotis Theodorakakos, John Pavlopoulos, Prodromos Malakasiotis, Ion Androutsopoulos
Aspect-Based Sentiment Analysis Aspect-Based Sentiment Analysis (ABSA) +2