34 documents found, page 1 of 4
Abdominal Hypoperfusion and Acute Kidney Injury in the Critically Ill Patient w...
Pereira, Rui; Lopes, Diogo; Brandão Machado, Sara; Val-Flores, Luís; Caeiro, Fernando; Perdigoto, Rui; Marcelino, Paulo; Saliba, FaouziReduced abdominal perfusion pressure (APP) is an underdiagnosed potential pathophysiological mechanism for acute kidney injury (AKI) in the patient with liver cirrhosis and ascites. This study aimed to analyze the prevalence of abdominal hypoperfusion (AhP) (APP <60 mm Hg) and the impact of APP on AKI in critically ill patients with liver cirrhosis. This was a post hoc analysis from a prospective cohort study s...
A 20-minute rest period after warm-up impairs repeated sprint ability of elite ...
Tito, Sandro; Machado, Margarida; Lopes, Diogo; Lopes, Raul; Nakamura, FábioAfter the warm-up, roller hockey players undertake up to 20 minutes of recovery prior to starting the match. Moreover, during the match, the use of skates prevents substitute players from executing explosive exercises as part of a rewarm-up. These factors can lead to a decrease in the anaerobic performance in the early minutes of game participation. Thus, the aim of this study was to investigate the effects of ...
Analysis of the Folklore Legends from Lamego and Celorico de Basto
Duarte, Pedro; Lopes, DiogoThis article has as its goal the analysis of folklore legends from the regions of Lamego and Celorico de Basto. Considering the numerous fictional elements added by the tale tellers across several years, there still resides a truthful background, which reflects the historical accuracy. Three legends will be analyzed, two from the region of Lamego and one from Celorico de Basto, the latter recollected by the aut...
Experimental and numerical analyses of the hemodynamics impact on real intracra...
Souza, Andrews; Lopes, Diogo; Souza, Sérgio; Ribeiro, J.E.; Ferrera, Conrado; Lima, Rui A.This study investigates the impact of hemodynamics on real intracranial aneurysms (IAs) using experiments and computational fluid dynamics (CFD) simulations. A particle tracking velocimetry (PTV) approach was used to study the vortical structures inside a real aneurysm and validate numerical simulations performed at a steady regime for different flow rates. Moreover, this and two additional patient-specific cas...
Very high-order finite difference method on arbitrary geometries with Cartesian...
Clain, Stéphane; Lopes, Diogo; Pereira, Rui M. S.; Pereira, Paulo A.An arbitrary order finite difference method for solving non-linear convection Diffusion Reaction equations in curved boundary domains with Cartesian grid is proposed. Ghost points' values are determined with the Reconstruction Off-Site Data based on a polynomial interpolation using the least square method with constraints to enforce the boundary conditions. We propose a second-, fourth-, and sixth-order schemes...
Computational approaches for the automatic quantification of cells from brain i...
Lopes, Diogo; Campos, Ana Bela; Maciel, P.; Novais, Paulo; Fernandes, B.Microglia are glial cells residing in the central nervous system (CNS). They represent the first line of immune defence within the CNS and are responsible for fundamental physiological and pathological processes. Given their importance, the quantification of these cells is fundamental in a clinical context. However, this process is a major challenge, as conventional cell counting involves a specific set of tool...
Management of Cytomegalovirus Infection in Allogeneic Hematopoietic Stem Cell T...
Silva, Fernando; Martins, António; Ferraz, Paula; Lopes, Diogo; Bastos, Juliana; Joana Araújo, Joana Araújo; Trigo, Fernanda; Pinto, RicardoCytomegalovirus (CMV) is a type of double-stranded deoxyribonucleic acid virus belonging to the herpesviridae family. Following a primary infection, the virus becomes latent in various types of white blood cells. Cytomegalovirus infection can remain latent or become active, especially in immunocompromised individuals, such as those undergoing hematopoietic stem cell transplantation (HSCT), where CMV reactivatio...
Towards an Integrated Approach to Wildfire Risk Assessment: When, Where, What a...
Chuvieco, Emilio; Yebra, Marta; Martino, Simone; Thonicke, Kirsten; Gómez-Giménez, Marta; San-Miguel, Jesus; Oom, Duarte; Velea, RamonaThis paper presents a review of concepts related to wildfire risk assessment, including the determination of fire ignition and propagation (fire danger), the extent to which fire may spatially overlap with valued assets (exposure), and the potential losses and resilience to those losses (vulnerability). This is followed by a brief discussion of how these concepts can be integrated and connected to mitigation an...
Structural schemes for one dimension stationary equations
Clain, Stéphane; Pereira, Rui M. S.; Pereira, Paulo A.; Lopes, DiogoIn this paper, we propose a new paradigm for finite differences numerical methods, based on compact schemes to provide high order accurate approximations of a smooth solution. The method involves its derivatives approximations at the grid points and the construction of structural equations deriving from the kernels of a matrix that gathers the variables belonging to a small stencil. Numerical schemes involve co...
High-performance thermoelectric oxides: processing approaches and composition d...
Kovalevsky, Andrei; Constantinescu, Gabriel; Lopes, Diogo; Zakharchuk, Kiryl V.; Rasekh, Shahed; Yaremchenko, Aleksey A.; Ferreira, Nuno M.; Xie, WenjieOxide materials represent a promising alternative to traditional thermoelectrics, by providing a possibility to operate at high temperatures, resulting in a higher Carnot efficiency. Although their conversion efficiency is considerably lower, their known structural and microstructural versatility can open new horizons for thermoelectric applications. This work reviews some representative cases of engineering th...