The appreciation of the dollar against the real has made consumer items more expensive and pressured inflation in Brazil, since from food to fuel and airline tickets, almost everything is influenced by the exchange rate. ...

Purpose: An adequate understanding of bone structural properties is critical for predicting fragility conditions caused by diseases such as osteoporosis, and in gauging the success of fracture prevention treatments. In ...

We investigate multifractal properties of commodity time series using multifractal detrended fluctuation analysis (MF-DFA). We find that agricultural and energy-related commodities exhibit very similar behavior, while the ...

The robustness of two widespread multifractal analysis methods, one based on detrended fluctuation analysis and one on wavelet leaders, is discussed in the context of time-series containing non-uniform structures with only ...

In a previous article [JDSGT 17, 267-295, 2019] we have extended to countable shifts the notion of multifractal pressure previuosly introduced by Olsen [J. d´ Analyse Math 131, 207-253, 2017]. This kind of pressure is ...

The Random Parameter model was proposed to explain the structure of the covariance matrix in problems where most, but not all, of the eigenvalues of the covariance matrix can be explained by Random Matrix Theory. In this ...

Irregularities in the amplitude and period are characteristic of both normal and pathological sustained vowels; they are a product of perturbations inherent in the phonation process. Their analysis provides useful diagnostic ...