Chaotic dynamics are thought to be rare in natural populations but this may be due to
methodological and data limitations, rather than the inherent stability of ecosystems …

Chaos, or exponential sensitivity to small perturbations, appears everywhere in nature.
Moreover, chaos is predicted to play diverse functional roles in living systems. A method for …

Phase-amplitude coupling is a promising construct to study cognitive processes in
electroencephalography (EEG) and magnetencephalography (MEG). Due to the novelty of …

Oscillatory activity in the brain has been associated with a wide variety of cognitive
processes including decision making, feedback processing, and working memory. The high …

This work presents a novel strategy of broadband vibration attenuation using a graded
piezoelectric metamaterial beam. A series of electrode pairs with varying lengths are applied …

Heart rate variability (HRV) is an important metric with a variety of applications in clinical
situations such as cardiovascular diseases, diabetes mellitus, and mental health. HRV data …

This work introduces the development of two software routines for Short-Time Fourier
Transform (STFT) and Inverse Short-Time Fourier Transform (ISTFT) along with know-how …

Background and objective Electrocardiogram (ECG) is widely used for the detection and
diagnosis of cardiac arrhythmias such as atrial fibrillation. Most of the computer-based …

Multivariate signal processing methods are becoming more prevalent as sensors and
modern science and technology improve. However, most existing multivariate signal …

Background Neural oscillations represent synchronous neuronal activation and are
ubiquitous throughout the brain. Oscillatory activity often includes brief high-amplitude bursts …