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Modelo matemático para estudo da variabilidade da frequência cardíaca
(Universidade Estadual de Ponta GrossaBrasilDepartamento de FísicaPrograma de Pós-Graduação em CiênciasUEPG, 2018)
Análise de agrupamentos dos dados de DFA oriundos de perfis elétricos de indução de poços de petróleo
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em Ciência e Engenharia do PetróleoPesquisa e Desenvolvimento em Ciência e Engenharia de Petróleo, 2009-07-24)
The main objective of this study is to apply recently developed methods of physical-statistic to time series analysis, particularly in electrical induction s profiles of oil wells data, to study the petrophysical similarity ...
Stratospheric gravity wave momentum flux from radio occultations
(American Geophysical Union, 2016-02)
Triples of GPS radio occultation (RO) temperature data are used to derive horizontal and vertical gravity wave (GW) parameters in the stratosphere between 20 km and 40 km from which the vertical flux of horizontal momentum ...
Fluctuation analysis of stellar x-ray binary systems
(Brasil, 2003)
We study time series of x-ray sources of 129 stellar binary systems present in the public data collected by the instrument All Sky Monitor on board of the satellite Rossi X-Ray Timing Explorer. The light time series was ...
Alternative Estimators of Long-Range Dependence
(WALTER DE GRUYTER GMBH, 2011)
In this article, we concentrate on various techniques to quantify long-range dependence: wavelets, Geweke and Porter-Hudak (GPH)'s semi-parametric method, the periodogram method, rescaled range analysis (R/S) and a ...
On the fractal properties of cosmic rays and Sun dynamics cross-correlations
(Cartagena de Indias, 2022)
We investigate the cosmic rays and ten physical parameters of heliosphere behavior considering the scaling features of their temporal evolution. Our analysis start with the cosmic rays measurements by a neutron monitor ...
Correlações nos dfa de diversos perfis geológicos. estudo de caso: Bacia de Campos - RJ
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em Ciência e Engenharia do PetróleoPesquisa e Desenvolvimento em Ciência e Engenharia de Petróleo, 2010-04-14)
This work aims to study the fluctuation structure of physical properties of oil well profiles. It was used as technique the analysis of fluctuations without trend (Detrended Fluctuation Analysis - DFA). It has been made ...