35 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...
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...
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...
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...
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...
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...
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...
Redox-promoted tailoring of the high-temperature electrical performance in Ca3C...
Constantinescu, Gabriel; Sarabando, Artur R.; Rasekh, Shahed; Lopes, Diogo; Sergiienko, Sergii; Amirkhizi, Parisa; Frade, Jorge R.This paper reports a novel composite-based processing route for improving the electrical performance of Ca3Co4O9 thermoelectric (TE) ceramics. The approach involves the addition of metallic Co, acting as a pore filler on oxidation, and considers two simple sintering schemes. The (1-x)Ca3Co4O9/xCo composites (x = 0%, 3%, 6% and 9% vol.) have been prepared through a modified Pechini method, followed by one- and t...
Numerical and experimental analysis of the anisotropy evolution in aluminium al...
Vincze, Gabriela; Lopes, Augusto; Butuc, Marilena C.; Yánez, Jesús; Lopes, Diogo; Holz, Laura; Graça, Ana; Pereira, António B.One of the most important characteristics of the sheet metal is its anisotropy. Asymmetric rolling (ASR) shows to be an adequate process to change the material anisotropy by increasing the normal anisotropy and decreasing the planar anisotropy. In this work, it is analysed the relationship between anisotropy and texture evolution using experimental and numerical approaches. Experimentally, the texture is modifi...