2026
Authors
Wang, BS; Wang, YX; Cardoso, JS; Wu, L;
Publication
IEEE OPEN JOURNAL OF SIGNAL PROCESSING
Abstract
Optical coherence tomography angiography (OCTA), known for its high-resolution and noninvasive imaging capability, has become a key modality for visualizing retinal vasculature. Accurate and automated segmentation of capillaries, arteries, veins, and foveal avascular zone in OCTA images is essential for quantitative analysis and disease assessment. In this paper, we propose a depth enhanced cascaded framework specifically designed for multi-class OCTA segmentation. Our method investigates the spatial distribution of vasculature in retinal images and integrates a novel self-supervised depth prediction module to learn implicit depth cues from volumetric data, thereby improving the discrimination of overlapping vascular layers. In addition, we design two topology-aware loss functions that explicitly encourage structural integrity and continuity of vessel segmentation, particularly at bifurcations and endpoints. Experiments on the OCTA-6 mm and OCTA-3 mm datasets demonstrate that our method outperforms existing state-of-the-art approaches, with mIoU gains of around 2% over prior method, IPNv2, thereby highlighting enhanced segmentation accuracy and vascular topology preservation.
2026
Authors
Dutra, I; Pechenizkiy, M; Cortez, P; Pashami, S; Jorge, AM; Soares, C; Abreu, PH; Gama, J;
Publication
Lecture Notes in Computer Science
Abstract
2026
Authors
Ricardo, FSD; Valente, FJ; de Camargo, VV; Vincenzi, AMR;
Publication
Lecture Notes in Networks and Systems - Proceedings of 20th Iberian Conference on Information Systems and Technologies (CISTI 2025)
Abstract
2026
Authors
Duraes, MJ; Barbosa, F; D'Inverno, G; Camanho, AS;
Publication
SOCIO-ECONOMIC PLANNING SCIENCES
Abstract
This paper focuses on the comprehensive assessment of regional performance in attaining the 2030 Strategic Framework for Education and Training (ET2030) established by the European Union. To this end, we propose a composite indicator framework based on robust Benefit-of-the-doubt models empirically validated through an extensive analysis of data spanning 32 countries and 101 NUTS-I level regions for 2019. We integrate contextual variables into a robust conditional model to ensure an equitable evaluation among regions grappling with distinct circumstances. Specifically, the unemployment rate and the percentage of the population holding national citizenship are considered. Moreover, the research identifies best practices from high-performing regions that can serve as benchmarks for underperforming areas. Analyzing regional-level data is crucial for understanding disparities between European regions and within countries.
2026
Authors
Silva, Aline Santos; Plácido da Silva, Hugo; Correia, Miguel; Gonçalves da Costa, Andreia Cristina; Laranjo, Sérgio;
Publication
Abstract
Our team previously introduced an innovative concept for an "invisible"
Electrocardiography (ECG) system, incorporating electrodes and sensors into a
toilet seat design to enable signal acquisition from the thighs. Building upon
that work, we now present a novel dataset featuring real-world, single-lead
ECG signals captured at the thighs, offering a valuable resource for advancing
research on thigh-based ECG for cardiovascular disease assessment. To our
knowledge, this is the first dataset of its kind.
The tOLIet dataset comprises 149 ECG recordings collected from 86 individuals
(50 females, 36 males) with an average age of 31.73 ± 13.11 years, a mean
weight of 66.89 ± 10.70 kg, and an average height of 166.82 ± 6.07 cm.
Participants were recruited through direct contact with the Principal
Investigator at Centro Hospitalar Universitario de Lisboa Central (CHULC) and
via clinical consultations conducted at the same institution. Each recording
includes four differential signals acquired from electrode pairs embedded in
the toilet seat, with reference signals obtained from a standard 12-lead
hospital ECG system.
2026
Authors
Carrera, I; Criollo, J; Dutra, I;
Publication
SMART TECHNOLOGIES, SYSTEMS AND APPLICATIONS, SMARTTECH-IC 2024, PT I
Abstract
This paper presents a novel approach to the computational representation of cellular lines using transformer-based embeddings. By leveraging state-of-the-art natural language processing techniques, we generate context-aware embeddings from biomedical literature from the PubMed database, offering a more nuanced and biologically relevant representation of cellular lines compared to traditional methods like TF-IDF and SVDD. We applied these embeddings to cluster cellular lines, using the elbow method to identify a set of distinct clusters that reflect biologically meaningful relationships. To evaluate the quality of these clusters, we employed the Topic Coherence metric, achieving a coherence score of 0.395, indicative of moderate consistency across clusters. The results demonstrate the potential of transformer-based models to improve drug discovery by identifying shared characteristics between cellular lines, enabling more accurate drug response predictions and advancing personalized medicine. This method offers an interesting improvement in the precision of cellular line modeling, paving the way for more efficient drug repositioning and targeted therapies in cancer research.
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