Margarida da Costa Cordeiro — 2025

Hydrothermal vents provide unique environments to study microbial diversity, ecological adaptations, and their broader significance for astrobiology and biotechnology. This thesis examined prokaryotic communities from two Azorean systems: the terrestrial fumarole Caldeira Seca (CS) and shallow-water…

Martim Miguel Soares Teixeira — 2025

The work addresses seismic response across a broad spectrum of tunnel cross-sections beyond the classical circular and rectangular forms. Five representative geometries with the same rectangular nominal usable internal area were analysed in a linear-elastic framework. A neutral, normalised impulse w…

João Barreiros Coelho Rodrigues — 2025

Aerial image segmentation plays a critical role in domains ranging from urban development to environmental assessment and emergency management. Despite the state-of-the-art accuracy of Vision Transformers (ViTs) for this task, their deployment on edge devices is still largely underexplored due to th…

Mafalda Cambraia Duarte Ricardo Nunes — 2025

The excessive use of chemical fertilisers has caused soil degradation, water contamination, and loss of microbial diversity. This study explored the potential of Nannochloropsis gaditana extracts as biostimulants for tomato cultivation as a viable chemical fertiliser replacement. Five extracts (Type…

Maria Beatriz Dias Correia — 2025

Exposure and Response Prevention (ERP) is the gold-standard therapy for Obsessive-Compulsive Disorder (OCD), a debilitating anxiety disorder. This treatment approach faces challenges related to personalization and long-term effectiveness. This thesis investigated the feasibility and preliminary effi…

João Pedro Vieira Praxedes — 2025

This thesis presents a process of transforming carbon dioxide emissions, traditionally regarded as waste, into sustainable aviation fuels. This work is motivated by the urgent need to face climate change and lower greenhouse gas emissions to the athmosphere, specialy from highly poluting sectors suc…

Beatriz Fernandes Leal — 2025

The rapid expansion of the biodiesel industry generates a substantial surplus of crude glycerin (about 10% of the mass of the processed fat), which undermines its economic and environmental sustainability. Refining this glycerin for pharmaceutical or cosmetic uses proves costly and energy-intensive.…

Dinis Brito e Cunha Ventura — 2025

This work proposes a comprehensive framework to optimize both tactical and daily cash logistics across a network of stores, aiming to improve operational efficiency and reduce capital immobilization. The approach tailors inventory management parameters to different store behaviors, acknowledging the…

Francisco Maria Gaspar de Assunção — 2025

In the presence of strong electromagnetic fields, the energy radiated by accelerated relativistic charged particles becomes comparable to their kinetic energy. Under such conditions, radiation reaction, i.e., the recoil charges experience when radiating, must be taken into account to correctly descr…

André Freitas Reis — 2025

This thesis investigates Life Cycle Assessment (LCA) as both an educational tool and a practical methodology for evaluating environmental footprints in the chemical industry of acetaldehyde production. The work is divided into two main aspects: the theoretical exploration and conceptual understandi…