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Publications

2026

Building of transformer-based RUL predictors supported by explainability techniques: Application on real industrial datasets

Authors
Dintén, R; Zorrilla, M; Veloso, B; Gama, J;

Publication
INFORMATION FUSION

Abstract
One of the key aspects of Industry 4.0 is using intelligent systems to optimize manufacturing processes by improving productivity and reducing costs. These systems have greatly impacted in different areas, such as demand prediction and quality assessment. However, the prognostics and health management of industrial equipment is one of the areas with greater potential. This paper presents a comparative analysis of deep learning architectures applied to the prediction of the remaining useful life (RUL) on public real industrial datasets. The analysis includes some of the most commonly employed recurrent neural network variations and a novel approach based on a hybrid architecture using transformers. Moreover, we apply explainability techniques to provide comprehensive insights into the model's decision-making process. The contributions of the work are: (1) a novel transformer-based architecture for RUL prediction that outperforms traditional recurrent neural networks; (2) a detailed description of the design strategies used to construct the models on two under-explored datasets; (3) the use of explainability techniques to understand the feature importance and to explain the model's prediction and (4) making models built for reproducibility available to other researchers.

2025

From "Worse is Better" to Better: Lessons from a Mixed Methods Study of Ansible's Challenges

Authors
Carreira, C; Saavedra, N; Mendes, A; Ferreira, JF;

Publication
CoRR

Abstract

2025

Swin Transformer Applied to Breast MRI Super-Resolution in a Cross-Cohort Dataset

Authors
Sousa, P; Sousa, H; Pereira, T; Batista, E; Gouveia, P; Oliveira, HP;

Publication
2025 IEEE 38TH INTERNATIONAL SYMPOSIUM ON COMPUTER-BASED MEDICAL SYSTEMS, CBMS

Abstract
Advancements in the care for patients with breast cancer have demanded the development of biomechanical breast models for the planning and risk mitigation of such invasive surgical procedures. However, these approaches require large amounts of high-quality magnetic resonance imaging (MRI) training data that is of difficult acquisition and availability. Although this can be solved using synthetic data, generating high resolution images comes at the price of very high computational constraints and tipically low performances. On the other hand, producing lower resolution samples yields better results and efficiency but falls short of meeting health professional standards. Therefore, this work aims to validate a joint approach between lower resolution generative models and the proposed super-resolution architecture, titled Shifted Window Image Restoration (SWinIR), which was used to achieve a 4x increase in image size of breast cancer patient MRI samples. Results prove to be promising and to further expand upon the super-resolution state-of-the-art, achieving good maximum peak signal-to-noise ratio of 41.36 and structural similarity index values of 0.962 and thus beating traditional methods and other machine learning architectures.

2025

Measuring willingness to pay for freshness in perishable goods: An empirical analysis

Authors
Mariana Sousa; Sara Martins; Maria João Santos; Pedro Amorim; Winfried Steiner;

Publication
Sustainability Analytics and Modeling

Abstract

2025

The TourX Project Visit to China

Authors
Au-Yong-Oliveira, M; Gennarelli, A; Heinzel, R; Vizzarro, E; Branco, F;

Publication
International Conference on Tourism Research

Abstract
This study provides an extensive examination of tourist perceptions during a visit to China, conducted within the framework of the Erasmus+ TourX project. The project includes participants from Spain, Italy, Germany, Greece, Belgium, and Portugal. Tourism is widely acknowledged as a mechanism for cultural exchange, fostering intercultural learning and broadening global perspectives. This research aims to empirically analyze the experiences and behaviors of tourists within an unfamiliar cultural environment. The findings contribute to the broader academic discourse on the role of tourism in facilitating cross-cultural engagement and its implications for the tourism industry in China. 

2025

Are Users More Willing to Use Formally Verified Password Managers?

Authors
Carreira, C; Ferreira, JF; Mendes, A; Christin, N;

Publication
CoRR

Abstract

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