242 documents found, page 1 of 25
Building a Portuguese coalition for biodiversity genomics
Marques, João; Alves, Paulo; Amorim, Isabel; Lopes, Ricardo; Moura, Mónica; Meyers, Eugene; Sim-sim, Manuela; Sousa-Santos, Carla; Alves, JuditeThe diverse physiography of the Portuguese land and marine territory, spanning from continental Europe to the Atlantic archipelagos, has made it an important repository of biodiversity throughout the Pleistocene glacial cycles, leading to a remarkable diversity of species and ecosystems. This rich biodiversity is under threat from anthropogenic drivers, such as climate change, invasive species, land use changes...
Convergence rates for sequences of bifurcation parameters of nonautonomous dyna...
Silva, Teresa; Silva, Luís; Fernandes, SaraIn this paper we study a 2-parameter family of 2-periodic nonautonomous systems generated by the alternate iteration of two stunted tent maps. Using symbolic dynamics, renormalization and star product in the nonautonomous setting, we compute the convergence rates of sequences of parameters obtained through consecutive star products/renormalizations, extending in this way Feigenbaum’s convergence rates. We also ...
Endoscopic management of choanal obliteration following radiotherapy for nasoph...
Rebelo, Diliana; Silva, Luís; Miguéis, JorgeAcquired choanal obliteration, though rare post-radiotherapy, can result from various factors. Patients usually present with nasal obstruction, rhinorrhoea, anosmia, and hypoacusis. Endoscopy and imaging often reveal scar tissue obstructing the posterior nasal cavity. Surgical treatment is possible but carries a high risk of re-stenosis. This report discusses a case of post-radiotherapy choanal obliteration tre...
Management of temporal bone trauma – literature revision and algorithm proposal
Rebelo, Diliana; Rato, Catarina; Silva, Luís; Miguéis, António; Miguéis, JorgeIntroduction: Temporal bone trauma frequently occurs in the context of high-kinetic-energy trauma, often associated with multiple bodily injuries. Objective: To present a brief literature review on temporal bone trauma and propose a protocol for approaching these situations in a tertiary hospital. Description: Initial assessment following high-kinetic-energy trauma requires a summary ABCDE observation to ensure...
Tourists' assessment of economic value, benefits and negative impacts of pedest...
Azevedo, António; Freire, Francisco; Silva, Luís; Carapinha, Aurora; Matos, RuteThis paper presents the conclusions of an exploratory study conducted by an Associated Research Laboratory which aimed to fill a gap in research by empirically assessing the quality and economic value of the recreational cultural ecosystem services generated by two walkways/boardwalks in Portugal (MRW-Mondego River and PRW-Paiva River). A questionnaire applied to visitors at the entrances/exits of those linear ...
Legal frameworks for blockchain applications: a comparative study with implicat...
Hafe, Francisco Von; Wagle, Yash; Guede-Fernández, Federico; Giordano, Ana Paula; Silva, Luís; Azevedo, SaloméIntroduction: The decentralised nature of blockchain technology challenges traditional legal frameworks, creating regulatory gaps in asset classification, taxation, and consumer protection. In Europe, divergent approaches, from specialised blockchain laws to adaptations of general financial legislation, hinder cross-border deployment and limit blockchain’s potential. These disparities make compliance difficult ...
A Pragmatic Approach for Web3 Software Quality Assurance Based on International...
Antunes, Rodrigo Cerejo; Freitas, Liliana; Dias, Pedro; Silva, Luís; Guede-Fernandez, Federico; Azevedo, SaloméEnsuring software quality in the Web3 ecosystem presents unique challenges due to its decentralized architecture and evolving technical landscape. While international standards such as the SQuaRE (Systems and software Quality Requirements and Evaluation) framework offer structured approaches for quality assurance, they are often perceived as overly theoretical and not directly applicable to blockchain-based app...
The conversion of rockrose (Cistus ladanifer L.) shrubland into biodiverse past...
Vieira, João; Filip, Iván Daniel; Soares Curado de Matos, Isabel Cristina; Rodrigues, Alessandra; Trindade, Ana Rita; Silva, Luís; Cassinello, JoãoPastures in the Mediterranean region are vital for sustaining local agriculture and preserving biodiversity. When well-managed, these pastures enhance soil structure and fertility, reduce erosion, and improve water retention. These functions are especially critical in a climate marked by hot, dry summers and mild, wet winters. Moreover, these systems play a key role in carbon sequestration, contributing signifi...
Hiking tourism and rural development
Silva, Luís; Freire, Francisco; Azevedo, António; Matos, RuteThis article examines hiking tourism’s contribution to rural development, as perceived by both visitors and local stakeholders / residents, with reference to the Mondego Walkways in central Portugal. The study is based on data collected through quantitative and qualitative methods, namely a survey carried out in situ with walkways’ visitors (n = 299) and a set of 16 semi‑structured interviews conducted with loc...
A BiLSTM approach to outfit compatibility and image similarity
Silva, Luís; Oliveira, Francisco; Gomes, Ivan; Araújo, C. Mendes; Oliveira, JoãoIn the ever-evolving world of fashion, building the perfect outfit can be a challenge. We propose a fashion recommendation system, which we call Visual Search, that uses computer vision and deep learning to ensure a coordinated set of fashion recommendations. The system allows users to upload a single photo of their outfit, where a pretrained YOLO model, further fine-tuned on a dataset of labeled clothing items...