103 documents found, page 1 of 11
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...
Algerian’s Seismic Catalogue Completeness from Historical Instrumental Monitori...
Ayadi, A.; Ousadou, F.; Roumane, K.; Harbi, A.; Maouche, S.; Bezzeghoud, M.; Meghraoui, M.For any seismic hazard study, a reliable, homogenized and complete seismic catalogue is required. The Algerian seismicity catalogue has been recently updated by retrieving and reappraising many historical events. The Algerian seismic network has also been densified up to about 80 seismic stations covering the Tell Atlas which is the most active area of northern Algeria for monitoring of the seismic activity red...
Surface Deformation Monitoring from SAR Interferometry for Seismic Hazard Asses...
Aguemoune, S.; Ayadi, A.; Belhadj-Aissa, A.; Bezzeghoud, M.In seismogenic zones, geodetic campaigns are usually used to monitor the ground deformation. Nowadays, satellite imaging became a powerful tool to monitor surface deformation on very large areas using InSAR (Interferometry Synthetic Aperture Radar). To get reliable results, reducing errors became a real challenge. We recently proposed a new phase unwrapping procedure and a new technique to reduce atmospheric er...
High-density Seismic Network for Monitoring Alentejo Region (Portugal) and Miti...
Manso, M.; Bezzeghoud, M.; Borges, J. F.; Caldeira, B.; Fontiela, J.; Ayadi, A.The seismic sensor network Alentejo (SSN-Alentejo) developed by the Earth Sciences Institute (Instituto de Ciências da Terra, University of Évora) brings the largest high-density seismic sensor network ever deployed in Portugal. This novel network aims to improve the characterization of seismic activity in the region, through a high-resolution mapping of seismic clusters and known faults. Over the next two year...
Special Focus on Advances in Symbolic and Numeric Computation IV
Loja, M.A.R.; Bezzeghoud, M.; Barbosa, J. I.; Rodrigues, J. A.This Special Focus on Advances in Symbolic and Numeric Computation IV of Mathematics in Computer Science (MCS) edited by Amélia Loja, Mourad Bezzeghoud, Joaquim Infante Barbosa and José Alberto Rodrigues is organized in connection with the 5th International Conference on Numerical and Symbolic Computation: Developments and Applications, and it is devoted to publishing relevant results on the development and/or ...
The Portuguese National Seismic Network —Products and Services
Carrilho, F.; Custodio, S.; Bezzeghoud, M.; Oliveira, C. S.; Marreiros, C.; Vales, D.; Alves, P.; Pena, A.; Madureira, G.; Escuer, M.; Silveira, G.Portugal, located in the southwest region of the Eurasian plate, has been affected by several destructive earthquakes throughout its history, the most well-known being the 1755 Great Lisbon earthquake. The seismicity of the territory, both in the mainland and in the Azores and Madeira islands, has prompted the continuous development of seis- mic monitoring, from the first known macroseismic inquiry, following t...
On-site Sensor Noise Evaluation and Detectability in Low Cost Accelerometers
Manso, M.; Bezzeghoud, M.Seismic networks help understanding the phenomena related with seismic events. These networks are employing low-cost accelerometers in order to achieve high-density deployments enabling accurate characterisation (high resolution) of strong earthquake motion and early warning capabilities. In order to assess the applicability of low-cost accelerometers in seismology, it is essential to evaluate their noise chara...
Monitoring the Earth: the Near-Future Developments in Seismology
Bezzeghoud, M.; Manso, M.Seismology deals with the study of the activity of physical forces responsible for the origin of earthquakes and the seismic waves generated within the Earth. All structures located from the center of the Earth to its surface are the subject of study in this discipline. Seismology therefore pursues the understanding of the Earth’s internal structure and the physical processes that cause earthquakes, resorting t...
A possible radio anomaly observed on the occasion of the MW=6.0 earthquake occu...
Biagi, P.F.; Ermini, A.; Boudjada, M.; Eichelberger, H.; Katzis, K.; Contadakis, M.; Skebelis, C.; Bezzeghoud, M.; Nina, A.; Nico, A:Since 2009, several VLF/LF radio receivers have been installed throughout Europe in order to realize a European radio network for studying the radio precursors of earthquakes, called the INFREP network. The current network has nine VLF/LF receiving stations, two in Romania and Greece, one in Italy, Austria, Portugal, Cyprus, and Serbia. The receivers can measure with 1 min sampling rate the intensity of 10 radi...