Cookies
O website necessita de alguns cookies e outros recursos semelhantes para funcionar. Caso o permita, o INESC TEC irá utilizar cookies para recolher dados sobre as suas visitas, contribuindo, assim, para estatísticas agregadas que permitem melhorar o nosso serviço. Ver mais
Aceitar Rejeitar
  • Menu
Sobre

Sobre

Carla Teixeira Lopes é, atualmente, professora auxiliar no Departamento de Engenharia Informática da Faculdade de Engenharia da Universidade do Porto e investigadora sénior no INESC TEC. É doutorada (2013) em Engenharia Informática pela Faculdade de Engenharia da Universidade do Porto. Tem experiência de investigação e coordenação de trabalhos nas áreas de recuperação de informação, sistemas de gestão de dados, interação pessoa-computador, World Wide Web e análise de dados. A sua investigação atual está relacionada com recuperação de informação em saúde, com especial enfoque no desenvolvimento de ferramentas que apoiem os consumidores de saúde. 

 

Tópicos
de interesse
Detalhes

Detalhes

  • Nome

    Carla Lopes
  • Cargo

    Investigador Sénior
  • Desde

    01 maio 2014
005
Publicações

2025

Can Llama 3 Accurately Assess Readability? A Comparative Study Using Lead Sections from Wikipedia

Autores
Rodrigues, JF; Cardoso, HL; Lopes, CT;

Publicação
Research Challenges in Information Science - 19th International Conference, RCIS 2025, Seville, Spain, May 20-23, 2025, Proceedings, Part II

Abstract
Text readability is vital for effective communication and learning, especially for those with lower information literacy. This research aims to assess Llama 3’s ability to grade readability and compare its alignment with established metrics. For that purpose, we create a new dataset of article lead sections from English and Simple English Wikipedia, covering nine categories. The model is prompted to rate the readability of the texts on a grade-level scale, and an in-depth analysis of the results is conducted. While Llama 3 correlates strongly with most metrics, it may underestimate text grade levels. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

2025

Evaluating Llama 3 for Text Simplification: A Study on Wikipedia Lead Sections

Autores
Rodrigues, JF; Cardoso, HL; Lopes, CT;

Publicação
Companion Proceedings of the ACM on Web Conference 2025, WWW 2025, Sydney, NSW, Australia, 28 April 2025 - 2 May 2025

Abstract
Text simplification converts complex text into simpler language, improving readability and comprehension. This study evaluates the effectiveness of open-source large language models for text simplification across various categories. We created a dataset of 66, 620 lead section pairs from English and Simple English Wikipedia, spanning nine categories, and tested Llama 3 for text simplification. We assessed its output for readability, simplicity, and meaning preservation. Results show improved readability, with simplification varying by category. Texts on Time were the most shortened, while Leisure-related texts had the greatest reduction of words/characters and syllables per sentence. Meaning preservation was most effective for the Objects and Education categories. © 2025 Copyright held by the owner/author(s). Publication rights licensed to ACM.

2025

Cross-Lingual Entity Linking Using GPT Models in Radiology Abstracts

Autores
Dias, M; Lopes, CT;

Publicação
Research Challenges in Information Science - 19th International Conference, RCIS 2025, Seville, Spain, May 20-23, 2025, Proceedings, Part II

Abstract
Entity linking is an important task in medical natural language processing (NLP) for converting unstructured text into structured data for clinical analysis and semantic interoperability. However, in lower-resource languages, this task is challenging due to the limited availability of domain-specific resources. This paper explores a translation-based cross-lingual entity linking approach using GPT models, GPT-3.5 and GPT-4o, for zero-shot machine translation and entity linking with in-context learning. We evaluate our approach using a Portuguese-English parallel dataset of radiology abstracts. Our results show that chunk-level machine translation outperforms sentence-level translation. Moreover, our translation-based approach to cross-lingual entity linking of UMLS concepts outperformed the multilingual encoder method baseline. However, the in-context learning entity linking approach did not outperform a translation-based approach with a dictionary-based entity linking method. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

2024

Automatic Quality Assessment of Wikipedia Articles-A Systematic Literature Review

Autores
Moas, PM; Lopes, CT;

Publicação
ACM COMPUTING SURVEYS

Abstract
Wikipedia is the world's largest online encyclopedia, but maintaining article quality through collaboration is challenging. Wikipedia designed a quality scale, but with such a manual assessment process, many articles remain unassessed. We review existing methods for automatically measuring the quality of Wikipedia articles, identifying and comparing machine learning algorithms, article features, quality metrics, and used datasets, examining 149 distinct studies, and exploring commonalities and gaps in them. The literature is extensive, and the approaches follow past technological trends. However, machine learning is still not widely used by Wikipedia, and we hope that our analysis helps future researchers change that reality.

2024

Automated image label extraction from radiology reports - A review

Autores
Pereira, SC; Mendonca, AM; Campilho, A; Sousa, P; Lopes, CT;

Publicação
ARTIFICIAL INTELLIGENCE IN MEDICINE

Abstract
Machine Learning models need large amounts of annotated data for training. In the field of medical imaging, labeled data is especially difficult to obtain because the annotations have to be performed by qualified physicians. Natural Language Processing (NLP) tools can be applied to radiology reports to extract labels for medical images automatically. Compared to manual labeling, this approach requires smaller annotation efforts and can therefore facilitate the creation of labeled medical image data sets. In this article, we summarize the literature on this topic spanning from 2013 to 2023, starting with a meta-analysis of the included articles, followed by a qualitative and quantitative systematization of the results. Overall, we found four types of studies on the extraction of labels from radiology reports: those describing systems based on symbolic NLP, statistical NLP, neural NLP, and those describing systems combining or comparing two or more of the latter. Despite the large variety of existing approaches, there is still room for further improvement. This work can contribute to the development of new techniques or the improvement of existing ones.

Teses
supervisionadas

2023

ArchMine: Learning from non-machine-readable documents for additional insights

Autor
Mariana Ferreira Dias

Instituição
UP-FEUP

2023

Integration of models for linked data in cultural heritage and contributions to the FAIR principles

Autor
Inês Dias Koch

Instituição
UP-FEUP

2023

Images as data and metadata: management practices to promote Findability, Accessibility, Interoperability and Reusability of research data

Autor
Joana Patrícia de Sousa Rodrigues

Instituição
UP-FEUP

2023

Archive users, their characteristics and motivations

Autor
Luana Rodrigues Ponte

Instituição
UP-FEUP

2022

Automatic Categorization of Health-related Messages in Online Health Communities

Autor
João Paulo Gomes Torres Abelha

Instituição
UP-FEUP