The ability to detect users' emotions for the purpose of emotion engineering is currently one
of the main endeavors of machine learning in affective computing. Among the more common …

Although analysis of heart rate variability is widely used for the assessment of autonomic
function, its fundamental framework linking low-frequency and high-frequency components …

Respiratory sinus arrhythmia (RSA) is being used increasingly in psychophysiological
studies as an index of vagal control of the heart and may be among the most selective …

There is evidence showing that HPA axis responses to pharmacological provocation
depend on time of day with larger cortisol responses in the afternoon and evening compared …

The correlations of 11 indexes of heart rate variability were examined with
pharmacologically determined cardiac vagal tone in 15 normal subjects at supine rest. After …

Strategies for heart rate and respiration quantification are dependent upon a knowledge of
physiology and statistics. To develop appropriate and sensitive psychophysiological …

There are two major approaches to heart rate variability analysis: time domain analysis and
frequency domain (power spectrum) analysis. This review considers the normal power …

The cardiorespiratory system exhibits oscillations from a range of sources. One of the most
studied oscillations is heart rate variability, which is thought to be beneficial and can serve …

To assess the separate contributions of the sleep and circadian systems to changes in
cardiac autonomic nervous system (ANS) activity, 12 supine subjects participated in two 26 …

Although many laboratory studies have demonstrated changes in cardiac autonomic control
during psychological stress, few have attempted to demonstrate this effect in ambulatory …