2025
Autores
Majewska, M; Mazur-Wierzbicka, E; Duarte, N;
Publicação
Krakow Review of Economics and Management/Zeszyty Naukowe Uniwersytetu Ekonomicznego w Krakowie
Abstract
2025
Autores
Habib U.R. Habib;
Publicação
Preprints.org
Abstract
2025
Autores
Rahmani, Z; Pinto, AN; Barbosa, LS;
Publicação
PARALLEL PROCESSING AND APPLIED MATHEMATICS, PPAM 2024, PT II
Abstract
Secure Multiparty Computation (SMC) facilitates secure collaboration among multiple parties while safeguarding the privacy of their confidential data. This paper introduces a two-party quantum SMC protocol designed for evaluating binary Boolean functions using single qubits. Complexity analyses demonstrate a reduction of 66.7% in required quantum resources, achieved by utilizing single qubits instead of multi-particle entangled states. However, the quantum communication cost has increased by 40% due to the amplified exchange of qubits among participants. Furthermore, we bolster security by performing additional quantum operations along the y-axis of the Bloch sphere, effectively hiding the output from potential adversaries. We design the corresponding quantum circuit and implement the proposed protocol on the IBM Qiskit platform, yielding reliable outcomes.
2025
Autores
Nelson deMatos; Belem Barbosa; Marisol B. Correia;
Publicação
Contributions to management science
Abstract
2025
Autores
Gouveia, M; Mendes, T; Rodrigues, EM; Oliveira, HP; Pereira, T;
Publicação
APPLIED SCIENCES-BASEL
Abstract
Lung cancer stands as the most prevalent and deadliest type of cancer, with adenocarcinoma being the most common subtype. Computed Tomography (CT) is widely used for detecting tumours and their phenotype characteristics, for an early and accurate diagnosis that impacts patient outcomes. Machine learning algorithms have already shown the potential to recognize patterns in CT scans to classify the cancer subtype. In this work, two distinct pipelines were employed to perform binary classification between adenocarcinoma and non-adenocarcinoma. Firstly, radiomic features were classified by Random Forest and eXtreme Gradient Boosting classifiers. Next, a deep learning approach, based on a Residual Neural Network and a Transformer-based architecture, was utilised. Both 2D and 3D CT data were initially explored, with the Lung-PET-CT-Dx dataset being employed for training and the NSCLC-Radiomics and NSCLC-Radiogenomics datasets used for external evaluation. Overall, the 3D models outperformed the 2D ones, with the best result being achieved by the Hybrid Vision Transformer, with an AUC of 0.869 and a balanced accuracy of 0.816 on the internal test set. However, a lack of generalization capability was observed across all models, with the performances decreasing on the external test sets, a limitation that should be studied and addressed in future work.
2025
Autores
Pinto, JB; Carneiro, JF; de Almeida, FG; Cruz, N;
Publicação
2025 7TH EXPERIMENT@ INTERNATIONAL CONFERENCE, EXP.AT'25
Abstract
The efficient operation of Autonomous Underwater Vehicles (AUVs) is crucial for various applications, including weather forecasting, marine life sustainability, underwater mining, renewable energy harvesting, and defense operations. Given the limited energy storage available on AUVs, improving propulsion efficiency is a key challenge. Variable Buoyancy Systems (VBSs) offer a promising alternative to traditional propeller-based propulsion by consuming energy only during buoyancy adjustments, thereby reducing overall power consumption. This study builds on prior simulation-based research by experimentally evaluating the energy consumption and performance of different PID-based controllers for a prototype driven by an electromechanical VBS. The experimental results show that by adequately choosing a closed loop control algorithm, significant energy savings can be obtained without compromising the control performance.
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