191 documents found, page 1 of 20
Stream sediments geochemistry on the Valongo anticlinal, northern Portugal: Ars...
Carvalho1, P.; Albuquerque, M.T.D.; Chambel, L.; Silva, M.; Rocha, F.The Valongo anticline is known for the occurrence of several Sb-Au and As-Au mineral deposits, many of which have been exploited since Roman times. The Sb-Au and As-Au deposits occur in brecciated quartz veins, predominantly trending NE-SW, NNW-SSE, and ENE-WSW, cutting Cambrian to Carboniferous formations. An 801-stream sediment campaign was conducted in this area. Factorial kriging was applied as an interpola...
Prediction of Road Traffic Accidents on a Road in Portugal: A Multidisciplinary...
Infante, P.; Jacinto, G.; Santos, D.; Nogueira, P.; Afonso, A.; Quaresma, P.; Silva, M.; Nogueira, V.; Saias, J.; Gois, P.; Manuel, P.Road Traffic Accidents (RTA) cause human losses and irreparable physical and psychological damage to many of the victims. They also involve a very relevant economic dimension. It is urgent to improve the management of human and material resources for more effective prevention. This work makes an important contribution by presenting a methodology that allowed for achieving a predictive model for the occurrence o...
Learning from Accidents: Spatial Intelligence Applied to Road Accidents with In...
Nogueira, P.; Silva, M.; Infante, P.; Nogueira, V.; Manuel, P.; Afonso, A.; Jacinto, G.; Rego, L.; Quaresma, P.; Saias, J.; Santos, D.; Gois, P.Road traffic accidents are a major concern for modern society with a high toll on human life and involve hard to account economic consequences. New knowledge can be obtained from combining GIS tools with machine learning and artificial intelligence, developing what is, in this work, identified as spatial intelligence. This approach is tested in a case study of Setúbal district, Portugal, for the period of 2016 ...
A sinistralidade rodoviária no distrito de Setúbal
Infante, P.; Nogueira, V.; Manuel, P.; Gois, P.; Afonso, A.; Santos, D.; Jacinto, G.; Nogueira, P.; Rego, L.; Silva, M.; Gonçalves, N.A sinistralidade rodoviária é uma das maiores calamidades do nosso tempo, pelas perdas humanas e os danos físicos e psicológicos irreparáveis que provoca a muitas das vítimas, envolvendo também uma dimensão económica muito relevante. Indo de encontro a uma solicitação do Comando Territorial da Guarda Nacional Republicana de Setúbal (CTer GNR Setúbal) para o apoio científico no estudo da problemática da sinistra...
Eating out of home in Portugal: characterization and effects on dietary intake
Silva, M.; Rodrigues, Sara; Correia, D.; Rei, Mariana; Severo, M.; Costa, A.I.A.; Torres, Duarte; Lopes, C.<jats:title>Abstract</jats:title> <jats:p>This cross-sectional study aims to describe and compare energy, nutrient intake, and food consumption according to eating location and by age groups using data from the National Food, Nutrition and Physical Activity Survey (IAN-AF 2015/2016). Dietary intake was estimated by two non-consecutive days of food diaries (children)/24-hour recalls (other age groups) and four e...
Stream sediments geochemistry in the Valongo anticline, northern Portugal: Arse...
Carvalho, Paula; Albuquerque, Maria Teresa; Chambel, L.; Silva, M.; Rocha, F.O anticlinal de Valongo é conhecido pela ocorrência de vários depósitos minerais de Sb-Au e As-Au, muitos deles explorados desde os tempos romanos. Os depósitos de Sb-Au e As-Au ocorrem nos filões de quartzo com estrutura brechóide com direção predominante NE-SW, NNW-SSE, e ENE-WSW cortando formações do Câmbrico ao Carbónico. Uma campanha de 801 sedimentos de corrente foi obtida nesta área. A krigagem factorial...
Searching for Heavy Dark Matter near the Planck Mass with XENON1T
Aprile, E.; Abe, K.; Ahmed Maouloud, S.; Althueser, L.; Andrieu, B.; Angelino, E.; Angevaare, J. R.; Antochi, V. C.; Antón Martin, D.; Arneodo, F.7 pages, 6 figures; Multiple viable theoretical models predict heavy dark matter particles with a mass close to the Planck mass, a range relatively unexplored by current experimental measurements. We use 219.4 days of data collected with the XENON1T experiment to conduct a blind search for signals from multiply interacting massive particles (MIMPs). Their unique track signature allows a targeted analysis with o...
Low-energy calibration of XENON1T with an internal 37 Ar source
Aprile, E.; Abe, K.; Agostini, F.; Ahmed Maouloud, S.; Alfonsi, M.; Althueser, L.; Andrieu, B.; Angelino, E.; Angevaare, J. R.; Antochi, V. C.A low-energy electronic recoil calibration of XENON1T, a dual-phase xenon time projection chamber, with an internal 37Ar source was performed. This calibration source features a 35-day half-life and provides two monoenergetic lines at 2.82 keV and 0.27 keV. The photon yield and electron yield at 2.82 keVare measured to be (32.3±0.3) photons/keV and (40.6 ± 0.5) electrons/keV, respectively, in agreement with oth...
Erratum to: Sensitivity of the DARWIN observatory to the neutrinoless double be...
Agostini, F.; Maouloud, S. E. M. Ahmed; Althueser, L.; Amaro, F. D.; Antunovic, B.; Aprile, E.; Baudis, L.; Baur, D.; Biondi, Y.; Bismark, A.We correct an overestimation of the production rate of 137Xe in the DARWIN detector operated at LNGS. This formerly dominant intrinsic background source is now at a level similar to the irreducible background from solar 8B neutrinos, thus unproblematic at the LNGS depth. The projected half-life sensitivity for the neutrinoless double beta decay (0νββ) of 136Xe improves by 22% compared to the previously reported...
The triggerless data acquisition system of the XENONnT experiment
Cardoso, J.; Lopes, J.; Santos, J. M. F. dos; Silva, M.; XENON collaborationThe XENONnT detector uses the latest and largest liquid xenon-based time projection chamber (TPC) operated by the XENON Collaboration, aimed at detecting Weakly Interacting Massive Particles and conducting other rare event searches. The XENONnT data acquisition (DAQ) system constitutes an upgraded and expanded version of the XENON1T DAQ system. For its operation, it relies predominantly on commercially availabl...