61 documents found, page 1 of 7
Biomass and nutrient release dynamics of decomposing rolling down legume cover ...
Brito, Cátia; Martins, Sandra; Saraiva, Francisco; Roque, João; Arrobas, Margarida; Rodrigues, Manuel Ângelo; Correia, CarlosWell-managed cover crops are gaining traction as an alternative to conventional tillage, offering a range of agronomic and ecological benefits. This field study, conducted in a commercial vineyard in the Douro region (Portugal) during the 2022/2023 growing season, evaluated the decomposition dynamics and nutrient release from different legume cover crop residues over a period of 183 days after sowing and 114 da...
Phase-Resolved Optical Coherence Elastography: An Insight into Tissue Displacem...
Batista, Ana; Serranho, Pedro; Santos, Mário; Correia, Carlos; Domingues, José P.; Loureiro, Custódio; Cardoso, João Manuel; Barbeiro, SílviaRobust methods to compute tissue displacements in optical coherence elastography (OCE) data are paramount, as they play a significant role in the accuracy of tissue elastic properties estimation. In this study, the accuracy of different phase estimators was evaluated on simulated OCE data, where the displacements can be accurately set, and on real data. Displacement (∆d) estimates were computed from (i) the ori...
Hemothorax After Retroclavicular Approach to the Infraclavicular Region in a Cr...
Ribeiro, Sara; Pombo, André; Lages, Neusa; Correia, Carlos; Teixeira, Carla MargaridaThe retroclavicular approach to the infraclavicular region (RAPTIR) is a recently described locoregional technique for upper limb analgesia that offers advantages over the classic infraclavicular block. RAPTIR is considered an effective and easy-to-perform block associated with few complications and better patient comfort. We present a case of a critically ill patient with thoracic and upper limb trauma. Despit...
Time-dependent elastic numerical model for Optical Coherence Elastography of th...
Correia, Carlos; Batista, Ana; Barbeiro, Sílvia; Cardoso, João; Domingues, José Paulo; Henriques, Rafael; Loureiro, Custódio; Santos, Mário J.We present the initial stages of development of a Finite Element Method-based time-dependent elastic numerical model which seeks to support the employment of our Optical Coherence Elastography system for assessing murine retinal elasticity. The current model is able to reconstruct displacement maps in both homogeneous and heterogeneous domains with errors up to a few hundredths relatively to a known exact displ...
Phase-resolved optical coherence elastography: an insight into tissue displacem...
Batista, Ana; Serranho, Pedro; Santos, Mário; Correia, Carlos; Domingues, José P.; Loureiro, Custódio; Cardoso, João; Barbeiro, SílviaRobust methods to compute tissue displacements in optical coherence elastography (OCE) data are paramount, as they play a significant role in the accuracy of tissue elastic properties estimation. In this study, the accuracy of different phase estimators was evaluated on simulated OCE data, where the displacements can be accurately set, and on real data. Displacement (∆) estimates were computed from (i) the orig...
CENTR(AR): pulmões em andamento: manual de atividade física domiciliário
Marques, Alda (coord.); Simões, Adriana; Grave, Ana; Oliveira, Ana Carolina; Vieira, Ana; Laranjeiro, Ana Rita; Roque, André Gomes; Rijo, Ana SofiaSem resumo disponível.
Mechanical pruning and soil organic amending in two terroirs. Effects on wine c...
Botelho, Manuel; Ribeiro, Henrique; Cruz, Amândio; Duarte, Daniel F.; Faria, Diana L.; Khairnar, Kaushal S.; Pardal, Rafaela; Susini, MartaThe knowledge about the interaction between mechanical pruning and soil organic amending is still scarce. This study aimed to examine the effects of the interaction between these two practices on wine quality. Syrah grapes from two trial fields in Portugal subjected to two different pruning systems (mechanical pruning; hand spur pruning) and five different organic amendment treatments (control, biochar, municip...
Swept-source phase-stabilized optical coherence tomography setup for elastography
Batista, Ana; Correia, Carlos; Barbeiro, Sílvia; Cardoso, João; Domingues, José Paulo; Henriques, Rafael; Loureiro, Custódio; Santos, MárioWe present an Optical Coherence Elastography (OCE) system, based on a swept-source Optical Coherence Tomography (OCT) setup, and evaluate its performance in terms of phase stability and minimum detectable displacement. The ability to record sub-pixel movements in samples under dynamic conditions was also assessed. The OCE system has a time stability of 396.9 ± 46.7 ps. The phase stability, given by the standard...
On the numerical solution of the inverse elastography problem for time-harmonic...
Serranho, Pedro; Barbeiro, Sílvia; Henriques, Rafael; Batista, Ana; Santos, Mário; Correia, Carlos; Domingues, José Paulo; Loureiro, CustódioIn this paper we address the numerical solution of the inverse elastography problem, from the knowledge of the excitation field on the boundary and the displacement field in a grid of points within the domain. We suggest using a representation of the solution by the method of fundamental solutions and using a Newtontype method to iteratively approximate the Lam´e coefficients of the medium from elastography dis...
Effects of water and nutrient availability on morphological, physiological, and...
Musso, Carolina; Fontenele, Hudson G.V.; Pinto, Glória; Oliveira, Rhaul; Correia, Carlos; Moutinho-Pereira, José M.; Soares, Amadeu M.V. M.The cerrado is a Neotropical savanna characterized by a soil and vegetation mosaic where plants endure dystrophic soils and seasonal drought. Dry spells or flooding are the main environmental stress native species face in their growth period. African grasses are common invasive species, jeopardizing the biodiversity by displacing native species and outgrowing them. Invasive species may benefit from human interv...