This study examined chronic and short-term stress effects on heart rate variability (HRV), comparing time, frequency and phase domain (complexity) measures in 50 healthy adults. The hassles frequency subscale of the combined hassles and uplifts scale (CHUS) was used to measure chronic stress. Short-term stressor reactivity was assessed with a speech task. HRV measures were determined via surfac...

In this paper, static and dynamic behavior of a varactor of a micro-phase shifter under DC, step DC and AC voltages and effects of the residual stress on the phase diagram have been studied. By presenting a mathematical modeling, Galerkin-based step by step linearization method (SSLM) and Galerkin-based reduced order model have been used to solve the governing static and dynamic equations, resp...

In the early morning of March 25, 2006, 28-year-old Kyle Huff shot eight young men and women, six of them fatally, at a rave after-party on East Republican Street in the Capitol Hill section of Seattle. The gunman, a transplant fromMontana, then committed suicide just as the police arrived on the scene. Because of the perpetrator’s suicide, there was no need for a detailed investigation leading...

To observe psychological stress in the acoustic samples of daily-wage workers belonging to different states India. The study was based on observations obtained from prior work detecting psychoacoustic detectors stress. Acoustic were interviews conducted by NDTV throughout March–May 2020. Spectrogram and Fundamental Frequency variations used identify Stark differences existed mean fundamental fr...

Introduction: Microbubbles are widely used as contrast agent in diagnostic ultrasound. Recently they have shown good potential for applications in the therapeutic field such as drug delivery to the brain. Recent studies have shown focused ultrasound in conjunction with injected micro-bubbles could temporarily disrupt blood-brain barrier and let therapeutic agents transport into...

In this paper, the effect of the crack on dynamic behavior of cracked micro-beam in the presence of DC and AC loads are investigated. By applying the residual axial stress and fringing field stress, a nonlinear analytical model of cracked micro-beam is presented and crack is modeled by a massless rotational spring. The governing equation of the system is solved using Galerkin procedure and shoo...

This study investigates blood pressure (BP) and heart rate (HR) short-term variability and spontaneous baroreflex functioning in adult borderline hypertensive rats and normotensive control animals kept on normal-salt diet. Arterial pulse pressure was recorded by radio telemetry. Systolic BP, diastolic BP and HR variabilities and baroreflex were assessed by spectral analysis and the sequence met...

PURPOSE This study was undertaken to confirm the effects of autogenic training (AT) on stress response and heart rate variability in nursing school students experiencing stress related to clinical training. METHODS The study was carried out from September 2012 to April 2013 in a quasi-experimental nonequivalent control group using a pretest-posttest design. The participants were 40 nursing st...

Background: Since panic is characterized by stress-induced autonomic cardiac sensations, such as increased heart rate and palpitations, effects of experimental psycho-social stress on heart rate variability are of interest. Methods: 25 patients with a current panic disorder and 25 healthy controls matched by age and sex underwent the Trier Social Stress Test on two consecutive days. Heart rate ...