Results 31 to 40 of about 24,907 (232)

Methods and systems for extracting venous pulsation and respiratory information from photoplethysmographs [PDF]

open access: yes, 2019
A system and method for separating a venous component and an arterial component from a red signal and an infrared signal of a PPG sensor is provided.
Nourani, Mehrdad, Yousefi, Rasoul
core   +1 more source

Green textile dyeing process by using natural dyes: a review [PDF]

open access: yes, 2020
In the textile industry, up to 200,000 tons of dyes are lost to effluents every year during the dyeing and finishing operations, due to the inefficiency of the dyeing process. Today, the textile industry used average six hundred dyes and chemical for the
Mahmood, Salwa   +3 more
core   +1 more source

Sex features of cutaneous microvasculature in healthy working-age people

open access: yesКардиоваскулярная терапия и профилактика, 2022
Aim. To study sex characteristics of cutaneous microvascular structure and function in a cohort of healthy working-age people without cardiovascular diseases.Material and methods. The study included 35 healthy men (42±4 years) and 34 women (41 ±5 years).
K. V. Omelyanenko   +6 more
doaj   +1 more source

Alterations in electrodermal activity and cardiac parasympathetic tone during hypnosis [PDF]

open access: yes, 2015
Exploring autonomic nervous system (ANS) changes during hypnosis is critical for understanding the nature and extent of the hypnotic phenomenon and for identifying the mechanisms underlying the effects of hypnosis in different medical conditions.
Kekecs, Z, Szekely, A, Varga, K
core   +1 more source

Photoplethysmography Detection of Overreaching

open access: yesMedicine & Science in Sports & Exercise, 2019
ABSTRACT Introduction Detecting the onset of functional overreaching (FOR) or nonfunctional overreaching in endurance athletes is of prior importance to ensure reactive amendment of the scheduled training program. The objective of this study was to assess photoplethysmography (PPG) in overloaded athletes and test ...
Nicolas, Bourdillon   +2 more
openaire   +3 more sources

A review of machine learning techniques in photoplethysmography for the non-invasive cuff-less measurement of blood pressure [PDF]

open access: yes, 2020
Hypertension or high blood pressure is a leading cause of death throughout the world and a critical factor for increasing the risk of serious diseases, including cardiovascular diseases such as stroke and heart failure.
El-Hajj, C., Kyriacou, P. A.
core   +1 more source

Design of an oximeter based on LED-LED configuration and FPGA technology [PDF]

open access: yes, 2013
sensor
Allen   +11 more
core   +3 more sources

A Novel Adaptive Spectrum Noise Cancellation Approach for Enhancing Heartbeat Rate Monitoring in a Wearable Device [PDF]

open access: yes, 2018
This paper presents a novel approach, Adaptive Spectrum Noise Cancellation (ASNC), for motion artifacts removal in Photoplethysmography (PPG) signals measured by an optical biosensor to obtain clean PPG waveforms for heartbeat rate calculation.
Abt, Grant   +7 more
core   +2 more sources

The 2023 wearable photoplethysmography roadmap

open access: yesPhysiological Measurement, 2023
Abstract Photoplethysmography is a key sensing technology which is used in wearable devices such as smartwatches and fitness trackers. Currently, photoplethysmography sensors are used to monitor physiological parameters including heart rate and heart rhythm, and to track activities like sleep and exercise.
Charlton, Peter H   +50 more
openaire   +6 more sources

CLINICAL PERSPECTIVES ON PHOTOPLETHYSMOGRAPHY IN IDENTIFYING THE RISK OF DEVELOPING CARDIOVASCULAR DISEASES

open access: yesАктуальные проблемы теоретической и клинической медицины
Introduction. This literature review focuses on modern methods for assessing cardiovascular risk using photoplethysmography and heart rate variability.
B. А. Bugibayeva   +5 more
doaj   +1 more source

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