Encontrados 5 documentos, a visualizar página 1 de 1
A Path- and Label-cost Propagation Approach to speedup the Training of the Opti...
A. S. Iwashita; J. P. Papa; A. N. Souza; A. X. Falcão; R. Lotufo; V. M. Oliveira; Victor Hugo C. de Albuquerque; João Manuel R. S. TavaresIn general, pattern recognition techniques require a high computational burden for learning the discriminating functions that are responsible to separate samples from distinct classes. As such, there are several studies that make effort to employ machine learning algorithms in the context of "big data" classification problems. The research on this area ranges from Graphics Processing Units-based implementations...
Driving forces for changes in geographical distribution of Ixodes ricinus ticks...
Medlock, J.M.; Hansford, K.M.; Bormane, A.; Derdakova, M.; Estrada-Peña, A.; George, J-C; Golovljova, I.; Jaenson, T.G.; Jensen, J-K; Jensen, P.M.Many factors are involved in determining the latitudinal and altitudinal spread of the important tick vector Ixodes ricinus (Acari: Ixodidae) in Europe, as well as in changes in the distribution within its prior endemic zones. This paper builds on published literature and unpublished expert opinion from the VBORNET network with the aim of reviewing the evidence for these changes in Europe and discusses the many...
Diagnostic Assays for Crimean-Congo hemorrhagic fever
Vanhomwegen, J.; Alves, M. J.; Zupanc, T. A.; Bino, S.; Chinikar, S.; Karlberg, H.; Korukluoglu, G.; Korva, M.; Mardani, M.; Mirazimi, A.; Mousavi, M.Crimean-Congo hemorrhagic fever (CCHF) is a highly contagious viral tick-borne disease with case-fatality rates as high as 50%. We describe a collaborative evaluation of the characteristics, performance, and on-site applicability of serologic and molecular assays for diagnosis of CCHF. We evaluated ELISA, immunofluorescence, quantitative reverse transcription PCR, and low-density macroarray assays for detection...
Simulation of geomagnetic reversals through magnetic critical models
Dias,V. H. A.; Franco,J. O. O.; Papa,A. R. R.We use numerical simulations of a well-known phase-transition model to study reversals of the geomagnetic field. Each ring current in the geodynamo was supposed to behave as a magnetic spin while the magnetization of the model was supposed to be proportional to the Earth's magnetic dipole. We have performed a size-dependence study of the calculated quantities. Power laws were obtained for the distribution of ti...
Explorando sistemas hamiltonianos: estudo analítico
Monerat,G.A.; Silva,E.V. Corrêa; Oliveira-Neto,G.; Assumpção,A.R.P. de; Papa,A.R.R.Um pêndulo duplo submetido a torques externos é usado para introduzir alguns fundamentos da teoria de Sistemas Dinâmicos para os cursos de graduação em Física, logo após o aluno ter cursado a disciplina de mecânica analítica. Este sistema mostra-se um bom exemplo para a introdução de tais técnicas. As equações de movimento de Hamilton indicam a existência de soluções estacionárias (pontos de equilíbrio) no espa...
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