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Heart rate variability (HRV), a feature extracted from the heart rate signal, is commonly used for monitoring training loads, and fitness status within athletes. Various sensors can be used to ascertain HRV within athletes; two of which are considered within this investigation, namely PPG and ECG. We present methods for HRV collection and calculation using PPG, reducing HRV collection time requirement...
In the presented paper we have explained the design and implementation of a system that is capable in monitoring of mental stress in real time. To determine the stress of the person we have tried to estimate the autonomic state of the person, the idea is based on the basic fundamental, and it states emotional arousal is directly linked with the autonomic state of the person. To determine the autonomic...
Firefighting is a stressful occupation. The monitoring of psychophysiological measures in those professionals can be a way to prevent and early detect cardiac diseases and other stress-related problems. The current study aimed to assess morphological changes in the ECG signal induced by acute stress. A laboratory protocol was conducted among 6 firefighters, including a laboratory stress-inducer task...
The effects of stress on human behavior and performance have been well recognized. However, little has been investigated on the impact of psychological stress on pilots and astronauts. Living a life of constantly altered sleeping hours, pilots or astronauts are experiencing sleep stage fragments or long working hours with little or no sleep. The relationship between sleep and stress is reciprocal...
Physiological sensor analytics is becoming an important tool to monitor health as the availability of sensor-enabled portable, wearable, and implantable devices becomes ubiquitous in the growing Internet of Things (IoT). Physiological multi-sensor studies have been conducted previously to detect stress. In this study, we focus on ECG monitoring that can now be performed with minimally invasive wearable...
Among the reasons of accidents on roads there is drivers' drowsiness. So, it is very important to develop a system that detects an approach of drowsiness and awakes a driver in a case of alarm. The method of detection of drowsiness based on analysis of ECG parameters is convenient and informative enough. A problem of monitoring a driver's state by controlling his heart rate is actual because this...
Stress is an increasingly recognized phenomenon that has negative effects on growing numbers of people. Stress assessment is a complex issue, but different studies have shown that monitoring user psychophysiological parameter during daily life can be greatly helpful in stress evaluation. In this study a wearable biosensor platform able to collect physiological and behavioral parameters is reported...
A noninvasive parasympathetic autonomic function monitoring system was developed. Nine healthy adults were recruited. ARX model was used to precisely separate the effect of respiration and systolic blood pressure to heart rate variability (HRV). The respiratory sinus arrhythmia (RSA) impulse response magnitude, the parasympathetic autonomic function index, was estimated during supine and standing...
The development of computer-aided diagnosis tools for detecting specific health-related events occurrences is of a great importance in the medical practice nowadays. Actually, health professionals still use manual methods for screening physiological data to get valuable information. This task becomes fastidious when the data is very long. In this paper, we present a new and simple method, we called...
More and more, daily stress is making place in our life. Lack of physical activity, lack of psychical and mental relaxation is lowering our resistance to the stimuli, perturbing our internal harmony and can be a cause for serious diseases. As response, our body reflects the stress as different physiological changes, which can be measured and monitored. One of the changes that appears is in Pulse Wave...
The purpose of the study is to show the feasibility of a light-weight wearable electrocardiograph with three accelero-meters for monitoring stress in everyday life. It consists of an amplifier, a band pass filter, a microcomputer with an AD converter, a triaxial accelerometer, and a memory card. An ECG and three accelerations are sampled at 1 kHz for more than 24 hours, maximum 27 hours with a default...
This paper presents the hardware overview, design and implementation of a fully wireless ambulatory multi-parameter monitoring system. This mobile ambulatory system is designed to be integrated, wearable, and of low power consumption. The front-end hardware includes sensors and signal-conditioning circuits, integrated into a form factor of 30mmX50mm. Communication is implemented with Bluetooth sensor...
Heart Rate Variability analysis has been shown in several studies to measure the Autonomic Nervous System tone, which is strongly influenced by pain, stress or anxiety. We have previously described and developed an Analgesia/Nociception Index for pain measurement during surgical procedure. This index based on a heart rate variability analysis can be considered as a vagal tone index and used in several...
The CHRONIOUS system addresses a smart wearable platform, based on multi-parametric sensor data processing, for monitoring people suffering from chronic diseases in long-stay setting. Several signals are being recorded through wearable sensors and are stored together with additional information, entered by the patient. An Intelligent System, placed at a Smart Assistant Device, analyzes incoming data...
The Push-Pull Effect (PPE) is a physiological phenomenon defined as a reduction of +Gz tolerance induced by a previous exposure to a -Gz acceleration, that may lead to loss of consciousness. Aim of this study was to evaluate, for the first time, the cardiac rhythm changes associated with PPE during real flights. Data were collected in 3 pilots during flights on the Aermacchi MB- 339-CD aircraft. In...
This paper describes a novel ambulatory multiparameter physiological monitoring system. The ambulatory monitoring system forms a body area network (BAN) and acquires stress related physiological parameters in realtime. The system has been tested in the laboratory and emotional changes have been effectively detected.
This paper describes the design of aequorin which is the system for measurement and reduction of the user's stress for a day. This system consists of a wearable device which is composed of a pulse sensor, MCU (Micro Control Unit) board and iPodTouch and also a rocking chair with biofeedback function embedded with LED lights and a display for stress reduction experience. After the user comes back home,...
Reactivity is the pattern of reactions associated with response to changes in the environment such as stress. Labour with uterine contractions hampering fetal and uterine blood flow provides significant stress and we need to improve our ability to assess fetal reactivity biopatterns during delivery. The study illustrates progress made with regard to detailed analysis of the fetal heart rate (FHR)...
This article describes an approach to detecting mental stress using unobtrusive wearable sensors. The approach relies on estimating the state of the autonomic nervous system from an analysis of heart rate variability. Namely, we use a non-linear system identification technique known as principal dynamic modes (PDM) to predict the activation level of the two autonomic branches: sympathetic (i.e. stress-inducing)...
Stress is one of the most common reasons for a number of serious diseases. For the prevention and treatment of stress, a psycho-physiological monitoring system for stress measurement is needed. Because of the multifarious influences of stress on the physiological response of the body, a stress measurement system has to take into account as many parameters as possible. The pulse transit time (PTT),...
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