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Analysis of the tribological behaviour of W-Ti-N coatings

The aim objective of this work is to provide an experimental database for the tribological characteristics, at room and warm temperature (100ºC, 150ºC and 200ºC), between the AA5754-O aluminium alloy and a steel (H13) coated with a thin film (W-Ti-N). The experimental database was built based on pin-on-disk tests, without lubricant and using a minimum amount of lubricant. In order to reproduce the different con...

Role of malnutrition and parasite infections in the spatial variation in childr...

Anaemia is known to have an impact on child development and mortality and is a severe public health problem in most countries in sub-Saharan Africa. We investigated the consistency between ecological and individual-level approaches to anaemia mapping by building spatial anaemia models for children aged ≤15 years using different modelling approaches. We aimed to (i) quantify the role of malnutrition, malaria, Sc...

Síntese de novos materiais de carbono a partir de glicerol para aplicação em pr...

Glycerol-based carbon materials for the catalytic wet peroxide oxidation process

The influence of surface chemistry of activated carbons on the selective decomp...

Activated carbons can act as metal free catalysts on wet peroxide oxidation to generate the highly reactive HO• by means of H2O2 decomposition. To quantify the yield of HO• formed during the process (YHO•) the consumption of H2O2 and the oxygen formation were measured in experiments performed with and without an HO• scavenger. After 150 min of reaction, at T = 323 K, pH = 3 and catalyst load = 0.1 g L-1, the hi...

Towards the development of water purification technologies using carbon materia...

Development of glycerol-based carbon materials for environmental catalytic appl...

A glycerol-based carbon material was initially produced by partial carbonization of glycerol with sulphuric acid followed by calcination under inert atmosphere. This material, characterized by high thermal stability, low ash content, non-porous structure and basic character, was further activated in air atmosphere at different temperatures (from 150 to 350 oC), resulting in materials with less basic character, ...

Carbon nanotubes as base materials for water treatment processes

Análise de movimento em sequências de imagens de tráfego

Dissertação apresentada para obtenção do grau de Mestre em Engenharia Electrotécnica e de Computadores, na Faculdade de Engenharia da Universidade do Porto, sob a orientação do Prof. Doutor Aurélio J. de Castro Campilho

Epidemiology of malaria, schistosomiasis, geohelminths, anemia and malnutrition...

Background: Malaria, schistosomiasis and geohelminth infection are linked to maternal and child morbidity and mortality in sub-Saharan Africa. Knowing the prevalence levels of these infections is vital to guide governments towards the implementation of successful and cost-effective disease control initiatives. Methodology/Principal Findings: A cross-sectional study of 1,237 preschool children (0–5 year olds), 1...