Identification of brain activity associated with motor execution and, more importantly, with
motor imagery is necessary for the development of brain–computer interfaces. Most of recent …

Studies of many complex systems have revealed new collective behaviours that emerge
through the mechanisms of self-organised critical fluctuations. Subject to the external and …

Spectral analysis, based on the Fourier method, is a general tool in physics. Wavelets
appeared as a natural generalization of classical spectral analysis to the case of complex …

In online social dynamics, a robust scale invariance appears as a key feature of
collaborative efforts that lead to new social value. The underlying empirical data thus offers a …

This study presents the characterisation of multifractality of road excitation time series under
different road conditions for prediction of the durability of a suspension coil spring. Road …

The interplay between the critical fluctuations and the sample geometry is investigated
numerically using thin random-field ferromagnets exhibiting the field-driven magnetisation …

The global seismic noise, recorded on a network of 229 broadband seismic stations located
around the globe for 25 years, from the beginning of 1997 to the end of 2021, has been …

The prognostic properties of four low-frequency seismic noise statistics are discussed:
multifractal singularity spectrum support width, wavelet-based smoothness index of seismic …

The records of seismic noise in Japan for the period of 1997–2020, which includes the
Tohoku seismic catastrophe on 11 March 2011, are considered. The following properties of …

In many complex systems, self-organised criticality (SOC) provides a mechanism for the
diversity of spatiotemporal scales that optimises the system's response to omnipresent …