16 documents found, page 1 of 2
Impact of dietary inclusion of wine and olive oil waste extracts on physiologic...
Sousa, N.; Fernandes, Helena Assunção Lopes Magalhães; Medeiros, C.; Diogo, F.; Fontinha, F.; Oliva-Teles, A.; Belo, Isabel; Salgado, José ManuelAquaculture is the only way to satisfy the growing global demand for seafood without depleting natural fisheries resources. Disease outbreaks are major threats to aquaculture production. The use of antibiotics or chemotherapeutics has been a common practice to combat infectious diseases that threaten production and induce high economic losses. This practice promotes high environmental harmful impacts and risks ...
MARTA: a high-energy cosmic-ray detector concept for high-accuracy muon measure...
Abreu, P. et al. (45 authors); Andringa, S.; Assis, P.; Blanco, A.; Brogueira, P; Carolino, N.; Cazon, L.; Conceição, R.; Cunha, O; Diogo, F.A new concept for the direct measurement of muons in air showers is presented. The concept is based on resistive plate chambers (RPCs), which can directly measure muons with very good space and time resolution. The muon detector is shielded by placing it under another detector able to absorb and measure the electromagnetic component of the showers such as a water-Cherenkov detector, commonly used in air shower ...
Gestão curricular como prestação de serviço educativo
Cardoso, Maria Inês Silva Teixeira; Duarte, P.; Diogo, F.Procede-se neste estudo à análise dos processos de gestão do currículo na escola, tais como descritos e avaliados nos 289 relatórios de avaliação externa de escolas da região norte de Portugal, produzidos entre os anos de 2011 e 2017. Os dados indiciam graves fragilidades ao nível da gestão do currículo levada a cabo pelas escolas, permitindo a inferência de que o currículo não é ainda um projeto que as escolas...
Multi-messenger Observations of a Binary Neutron Star Merger
Pierre Auger and other collaborations (3541 authors); Mura, G.La; Abreu, P.; Andringa, S.; Assis, P.; Blanco, A.; Cazon, L.; Conceição, R.; Diogo, F.On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of $\sim 1.7\,{\rm{s}}$ with respect to the merger time. From the gravitational-wave signal, th...
Muon counting using silicon photomultipliers in the AMIGA detector of the Pierr...
Pierre Auger collaboration (422 authors); Abreu, P.; Andringa, S.; Assis, P.; Blanco, A.; Cazon, L.; Conceição, R.; Diogo, F.; Espadanal, J.; Lopes, L.AMIGA (Auger Muons and Infill for the Ground Array) is an upgrade of the Pierre Auger Observatory designed to extend its energy range of detection and to directly measure the muon content of the cosmic ray primary particle showers. The array will be formed by an infill of surface water-Cherenkov detectors associated with buried scintillation counters employed for muon counting. Each counter is composed of three...
Search for High-energy Neutrinos from Binary Neutron Star Merger GW170817 with ...
ANTARES, IceCube, Pierre Auger, LIGO Scientific, Virgo collaboration (1941 authors); Abreu, P.; Andringa, S.; Assis, P.; Blanco, A.; Cazon, L.The Advanced LIGO and Advanced Virgo observatories recently discovered gravitational waves from a binary neutron star inspiral. A short gamma-ray burst (GRB) that followed the merger of this binary was also recorded by the Fermi Gamma-ray Burst Monitor (Fermi-GBM), and the Anti-Coincidence Shield for the Spectrometer for the International Gamma-Ray Astrophysics Laboratory (INTEGRAL), indicating particle acceler...
Questions and Answers in Extreme Energy Cosmic Rays – a guide to explore the da...
Abreu, P.; Andringa, S.; Diogo, F.; Espírito Santo, M.C.The Pierre Auger Observatory is the largest extensive air shower detector, covering 3000 km 2 in Argentina. The Observatory makes available, for educational and outreach purposes, 1% of its cosmic ray data set, corresponding after 10 years of running to more than 35 000 cosmic ray events. Several different proposals of educational activities have been developed within the collaboration and are available. We wil...
Search for correlations between the arrival directions of IceCube neutrino even...
IceCube, Pierre Auger, Telescope Array collaboration (870 authors); Abreu, P.; Andringa, S.; Assis, P.; Blanco, A.; Cazon, L.; Conceicao, R.; Diogo, F.This paper presents the results of different searches for correlations between very high-energy neutrino candidates detected by IceCube and the highest-energy cosmic rays measured by the Pierre Auger Observatory and the Telescope Array. We first consider samples of cascade neutrino events and of high-energy neutrino-induced muon tracks, which provided evidence for a neutrino flux of astrophysical origin, and st...
The average longitudinal air shower profile: exploring the shape information
Conceição, R.; Andringa, S.; Diogo, F.; Pimenta, M.The shape of the extensive air shower (EAS) longitudinal profile contains information about the nature of the primary cosmic ray. However, with the current detection capabilities, the assessment of this quantity in an event-by-event basis is still very challenging. In this work we show that the average longitudinal profile can be used to characterise the average behaviour of high energy cosmic rays. Using the c...
Highlights from the Pierre Auger Observatory
Pierre Auger collaboration (496 authors); Abreu, P.; Andringa, S.; Assis, P.; Brogueira, P.; Cazon, L.; Conceicao, R.; Diogo, F.; Espadanal, J.The Pierre Auger Observatory is the world’s largest cosmic ray observatory. Our current exposure reaches nearly 40,000 km$^{2}$sr and provides us with an unprecedented quality data set. The performance and stability of the detectors and their enhancements are described. Data analyses have led to a number of major breakthroughs. Among these, we discuss the energy spectrum and the searches for large-scale anisotr...