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Observations of whistler-mode emission, including chorus, were made frequently by mid-altitude satellites such as Polar. In this study we examine an example of such emission when the high-frequency waveform receiver on board Polar was operating allowing direction-finding and polarization measurements in the low-altitude cusp. The results reveal at least two and possibly three distinct groups of narrow-banded...
Heart Rate Variability (HRV) is a measure of the magnitude of autonomic cardiac tone produced by sympathetic and parasympathetic innervations. Power spectral density estimates in adults use traditional low frequency (LF) and high frequency (HF) bands to assess HRV as an indicator of increased risk of cardiac mortality. Studies of altered HRV in infants suggest that classic methods need modification...
Congenital heart defects, such as Hypoplastic Left Heart Syndrome, are the most prevalent type of birth defect. Palliative reconstructive procedures may interrupt autonomic cardiac function and increase infant mortality rate. Autonomic cardiac tone is classically assessed using linear, Fourier-based techniques. A non-linear Poincare?? technique is proposed to more completely characterize heart rate...
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