Browsing by resource type "conference poster"
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- Analyzing Total Hip Arthroplasty: Straight Stem vs Anatomical Stem with Different Materials and ActivitiesPublication . Queirós, Pedro; Gueiral, Nuno; González-Gómez, Carlos David; Gueiral, Nuno[Introduction] Total Hip Arthroplasty involves replacing damaged parts of the hip joint with a prosthetic comprised of an artificial acetabular cup and femoral head. These components, made of durable, low-friction materials, aim to restore mobility, and alleviate pain in patients with hip joint degeneration, such as osteoarthritis or fractures. Utilizing computational mathematical models, such as the finite element method (FEM), it is possible to predict the behavior of materials under simulated loads from common daily activities [1], thereby anticipating potential failures in the femoral stem or the material itself.
- Co-pyrolysis of brown macroalgae and pinecones in a fixed bed reactorPublication . Silva, F.T.; Nascimento, M.; Pilão, R. M.; Neto, M.P.; Ribeiro, A.M.This study presents results on the slow co-pyrolysis of Laminaria digitata (LD) and pinecones (PC), at an average temperature of 560 °C, for mass ratios LD/PC of 100/0, 50/50, 30/70, 10/90 and 0/100. The biochar yields varied from 35.3 to 31.2 %, for bio-oils, the yields were in the range of 23.3 to 39.9 %, and for the gas phase, between 41.4 to 28.9 %, as the amount of PC increased in the feeding mixture. The biochars were characterized in terms of proximate analysis and higher heating value (HHV). The properties of bio-oils that were determined included pH, density and HHV, as well as identification of compounds by infrared analysis. CO2, CO, CH4 and H2 were identified in the gas phase of all the experiments by gaschromatography, but the most produced gas was CO2, followed by CO.
- Effect of mass flow rate and temperature on the gasification of animal fatPublication . Araújo, A.L.; Paiva, E.; Silva, F.T.; Ribeiro, A.; Campos, J.B.L.M.; Pilão, R.M.In this work, gasification of animal fat was studied. Tests were performed with an emulsion of fat and water and temperature and mass flow rate effects were evaluated. Gas chromatography was used to analyze the composition of producer gas. Carbon and hydrogen conversion efficiencies, dry gas yield, cold gas efficiency, and higher heating value of producer gas were determined. The results showed that temperature and mass flow rate determine the composition of the gas obtained and the performance of the gasification process. The gasification parameters increased with the temperature rise. The increase of mass flow rate contributes to a decrease in the overall performance of the gasification process.
- Graphene nanoparticles on refractive index of cancerous breast tissues: spectral approachPublication . Martins, Inês; Ferraz, Maria Pia; Ramos, C.A.; Vilão, G.This work presents a study on the influence of graphene nanoparticles on the refractive index (RI) for application in breast tissues as an aid in the diagnosis of cancerous cells, using a spectral approach to evaluate the behaviour of glycerine and water-based nanofluids in various proportions. Glycerine-water solutions with different volumetric fractions of graphene were prepared, and the RI was measured using an Abbe refractometer. UV-Vis absorption spectra were analysed, indicating that higher volumetric fractions of graphene significantly affect light absorption and scattering patterns. This preliminary study identifies the optimal graphene volumetric fractions for future analyses of light-tissue interaction, aiming to improve diagnostic methods and characterisation of cancerous tissues through light scattering.
- Produção de elipses e hipérboles na biografia cinematográficaPublication . Fontoura, Ana Priscila; Baptista, Adriana; Martins, Filipe; Morais, AntónioNa construção da biografia (vida escrita), a genealogia, frequentemente suportada por razões históricas e políticas, enquanto ciência, valoriza a investigação, para a produção de uma árvore híper-informativa, representando alegoricamente a família, com lacunas eventuais por carência de informação, no entanto, o texto literário, suportado pela apresentação icónica do real ou da ficção, valoriza para a biografia a retórica verbal capaz de desenhar o clímax (marcado por causas e consequências) e o segredo (marcado pelo tabu, ou pela ocultação, dissimulação ou disfarce).
- Protocolo de estudo para adaptação de ferramenta certificada para avaliação dos procedimentos de manipulação de medicamentos citotóxicos nos Países Africanos de Língua Oficial Portuguesa (PALOP)Publication . Pereira, Cátia; Jesus, Ângelo; Moreira, Fernando; Moreira, Fernando; Jesus, ÂngeloNos países de baixo e médio rendimento (PBMR), os recursos são muitas vezes inadequados e existem escassas oportunidades de formação sobre manipulação segura de citotóxicos. Para que seja possível a melhoria das condições em que trabalham estes profissionais, é indispensável a realização de avaliação do cumprimento das diretrizes internacionais. O objetivo deste trabalho é desenvolver um protocolo que permita identificar e adaptar uma ferramenta para avaliação da adequação da preparação de citotóxicos, em países africanos de língua oficial portuguesa (PALOP) considerados PBMR.
- A remote engineering solution for automating a roller hearth kilnPublication . Silva, Juarez; Fischer, Benedito R.; Alves, Gustavo R.; Alves, João B.We present the architecture for a remote application, accessible through the Internet, able to monitor and control a roller hearth kiln, used in a ceramics industry for firing materials. The proposed architecture is based on a Micro Web Server (MWS), whose main function is to monitor and control the firing process, by reading the data from a series of temperature sensors and by controlling a series of electronic valves and servo motors. This solution is also intended to be a low-cost alternative to other potential solutions. For better understanding the system to be automated and its operation we decided to develop a scale model (100:1) and experiment on it the devised solution, based on a MWS.
- Segurança e eficácia do uso de inibidores da PARP no tratamento do cancro do ovário e mama metastizadoPublication . Jesus, Ângelo; Pinto, Rafaela; Jesus, ÂngeloO cancro da mama é um dos cancros mais comuns na mulher. O cancro do ovário, embora tenha uma taxa de incidência relativamente baixa, quando é detetado está geralmente numa fase muito avançada, o que resulta num mau prognóstico e, consequentemente, numa elevada taxa de mortalidade. Estes cancros têm uma forte componente genética de onde resulta uma perda da proteína funcional através da linha germinal ou mutação somática, levando a uma maior dependência de mecanismos de reparação de DNA mais propensos a erros, promovendo a carcinogénese. Os PARPies são uma classe de agentes de supressão da atividade das enzimas PARP. Objetivo: Analisar a segurança e eficácia dos inibidores PARP no tratamento do cancro do ovário e mama metastático, possuindo como medidas as reações adversas major a PFS.
- A smart layer for remote laboratoriesPublication . Costa, Ricardo J.; Alves, Gustavo R.; Santos, DomingosSince the mid 90’s, there is a growing number of remote labs available through the Internet. Several solutions for harmonizing the software and hardware used for implementing this resource have already been proposed and described in literature. However, the present and perceived situation is the lack of such a thing like a standard approach to implement a remote lab, both in terms of hardware and software. This is also true when considering two common aspects to all remote labs: the physical space occupied by each and the power supply to the hardware used in it. In this paper we try to address these two common aspects by proposing the use of a standard domotic system, usually used in smart homes, able to control both the physical environment associated to the remote lab and the power supply to the devices and apparatus used on the experiments hosted at such remote lab.
- Stability of nanofluids CuO (40nm) in ethylene glycol or water base fluids with CTAB surfactant for biomedical applicationsPublication . Queirós, Ângela; Coelho, Maria de Fátima; Martins, Andreia; Iglesias, T. P.Abstract In this work, some properties of CuO nanofluids in distilled water and ethylene glycol base fluid were studied, comparing the stability of the nanofluid in samples with and without surfactant and measuring the electrical conductivity as a function of temperature and concentration.