15 documents found, page 1 of 2
Projeto LouMu - Muografia no Lousal
Teixeira, Pedro; Blanco, A.; Caldeira, Bento; Tomé, B.; Matos, J.; Borges, José Fernando; Cazón, L.; Lopes, L.; Afonso, L.; Pinto, M.; Pimenta, M.A viabilidade da muografia como técnica de sondagem tem sido demonstrada em diversos trabalhos ao redor do mundo, desde os seus primeiros passos. A muografia com muógrafos em ambiente subterrâneo tem um lado fácil devido à ausência da radiação de fundo, mas, por outro lado, o fluxo de muões é muito menor em comparação com o que é medido na superfície. É uma questão de condições geológicas e subterrâneas, deteto...
Muography in the university and in the museum
Afonso, L.; Alexandre, I.; Andringa, S.; Assis, P.; Blanco, O.; Bezzeghoud, M.; Borges, J.; Caldeira, B.; Cazon, L.; Costa, J.; Dobrilla, P.; Duarte, M.The LouMu team joins together specialists in particle detectors and in cosmic ray analyses, geophysicists and science communicators to muograph an underground gallery of an old mine, now open to visitors of a science museum. The muon telescope is made of Resistive Plate Chambers (RPCs) developed to operate stably and with low consumption at remote locations, and it has been tested in the Coimbra University, bef...
Muography for Underground Geological Surveys: Ongoing Application at the Lousal...
Teixeira, P.; Afonso, L.; Andringa, S.; Assis, P.; Bezzeghoud, M.; Blanco, A.; Borges, J. F.; Caldeira, B.; Cazon, L.; Dobrilla, P.; Lopes, L.The use of muons for geophysical surveys has been proved successful in numerous projects around the planet. The use of muography in an underground environment has an easy side, when compared to the surface, due to the absence of the background radiation. On the other hand, the muon flux is much lower than what is measured on the surface. Geological and underground conditions should be considered when defining t...
Online sales and business model innovation in art markets: a case study
Fernandes, A.; Afonso, L.Every year online sales represent a higher percentage of the sales total in nearly all sectors of the economy, and the art markets are no exception. However, there are few empirical studies showing how online sales and digital technologies are transforming the art markets at a micro-level. This study is based on the detailed examination of the financial performance of one of the two largest Portuguese auction h...
Cellular for the skies: exploiting mobile network infrastructure for low altitu...
Afonso, L.; Souto, N.; Sebastião, P.; Ribeiro, M.; Tavares, T.; Marinheiro, R.In this article we presented an overview of UASs for civil applications focusing on the communication component. We identified several available communication technologies for UAVs, their constraints, and also protocols available for implementing the remote operation of the vehicles. As an attractive solution for the A2G communication link for UAVs, we discussed the potential of mobile networks with their fully...
Prevalence of WMSD in the sewing sector of two companies of the footwear industry
Afonso, L.; Pinho, M. E.; Arezes, P.The few available studies indicate a high prevalence of WMSD in footwear industry, particularly in the sewing sector. Since there is a lack of studies on this issue, especially in Portugal, this paper aims to investigate the prevalence of WMSD among workers of the sewing sector in two companies of the footwear industry. Observations in the workplace were carried out and, further, a questionnaire survey was perf...
Risk factors associated with musculoskeletal symptoms in footwear sewing workers
Afonso, L.; Pinho, M. E.; Arezes, P.Beyond the lack of studies on this issue, particularly in Portugal, the relationship between the prevalence of musculoskeletal symptoms and many work-related risk factors is still very unclear. Therefore, in order to contribute to a better understanding of WMSD risk factors, this study aims to analyze the association between the prevalence of musculoskeletal symptoms in sewing workers of the footwear industry a...
Joana Vasconcelos: managing an artist’s studio in the early 21st century
Fernandes, A.; Afonso, L.Although still relatively young, Joana Vasconcelos is a respected artist on the international contemporary art scene. Her career has included a number of impressive achievements, such as a prestigious solo exhibition at the Palace of Versailles in 2012. Her success belies the romantic view of art and artists in which success is attributed to a combination of luck, talent and improvisation. This study demonstrat...
A multicenter validation of an endoscopic classification with narrow band imagi...
Nunes, P. Pimentel; Ribeiro, M. Dinis; Soares, João Bruno; Pinto, R. Marcos; Santos, C.; Rolanda, Carla; Bastos, R. P.; Areia, M.; Afonso, L.BACKGROUND AND STUDY AIM: The reliability and external validity of narrow band imaging (NBI) in the stomach have not been described consistently. The aim of the current study was to describe and estimate the accuracy and reliability of a simplified classification system for NBI in the diagnosis of gastric lesions. METHODS: Consecutive patients undergoing NBI endoscopy at two reference centers (n=85, 33% with dy...
Risco de cenários de dano vulneráveis de redes de abastecimento de água
Pinto, J.; Varum, H.; Duarte, A.; Afonso, L.; Varajão, J.; Bentes, I.Neste trabalho propõe-se uma metodologia integrada para a quantifi cação do risco associado a cenários de dano de redes de abastecimento de água, baseada na teoria da vulnerabilidade, com quantifi cação das consequências associadas às perdas da rede, para cada cenário identifi cado. A identifi cação das vulnerabilidades e dos riscos inerentes a este tipo de sistemas poderão contribuir para os tornar mais robust...