6 documents found, page 1 of 1
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...
The phenomenon of conversion polymorphism in Bi-containing metastable perovskites
Khalyavin, D.D.; Salak, A.N.; Fertman, E.L.; Kotlyar, O.V..; Eardley, E.; Olekhnovich, N.M.; Pushkarev, A.V.; Radyush, Yu.V.; Fedorchenko, A.V.A post-synthesis thermal treatment of metastable phases in the high-pressure stabilised perovskite BiFe1-yScyO3 system results in the irreversible formation of polymorphs which represent novel polar and antipolar structures with interesting magnetic properties. Such annealing-stimulated polymorphism is believed to be a general phenomenon which can be found in other systems.
Magnetic structure of an incommensurate phase of La-doped BiFe0.5Sc0.5O3: Role ...
Khalyavin, D. D.; Salak, A. N.; Lopes, A. B.; Olekhnovich, N. M.; Pushkarev, A. V.; Radyush, Yu. V.; Fertman, E. L.; Desnenko, V. A.; Fedorchenko, A. V.A 20% substitution of Bi with La in the perovskite Bi1-xLaxFe0.5Sc0.5O3 system obtained under high-pressure and high-temperature conditions has been found to induce an incommensurately modulated structural phase. The room-temperature x-ray and neutron powder diffraction patterns of this phase were successfully refined using the Imma(0,0,gamma)s00 superspace group (gamma = 0.534(3)) with the modulation applied t...
Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3
Khalyavin, D. D.; Salak, A. N.; Olekhnovich, N. M.; Pushkarev, A. V.; Radyush, Yu. V.; Manuel, P.; Raevski, I. P.; Zheludkevich, M. L.A metastable perovskite BiFe0.5Sc0.5O3 synthesized under high-pressure (6 GPa) and high-temperature (1500 K) conditions was obtained in two different polymorphs, antipolar Pnma and polar Ima2, through an irreversible behavior under a heating/cooling thermal cycling. The Ima2 phase represents an original type of a canted ferroelectric structure where Bi3+ cations exhibit both polar and antipolar displacements al...