Results 21 to 30 of about 1,964,125 (283)

Different circadian patterns of arterial stiffness are responsible for increased cardiovascular mortality in hemodialyzed patients

open access: yesPhysiological Reports, 2021
We hypothesized that volume changes during 48‐h are associated with different circadian patterns of arterial stiffness on non‐dialysis day compared to dialysis day and that the night‐time increase of arterial stiffness is associated with higher mortality.
Vedran Premužić, Bojan Jelaković
doaj   +1 more source

Pulses and waves of contractility [PDF]

open access: yesJournal of Cell Biology, 2017
The nature of signal transduction networks in the regulation of cell contractility is not entirely clear. In this study, Graessl et al. (2017. J. Cell Biol. https://doi.org/10.1083/jcb.201706052) visualized and characterized pulses and waves of Rho activation in adherent cells and proposed excitable Rho signaling networks underlying cell contractility.
openaire   +2 more sources

Pulse pedestal suppression using four-wave mixing in an SOA [PDF]

open access: yes, 2008
Experimental results are presented demonstrating how four-wave mixing in a semiconductor optical amplifier can be used to remove pulse pedestals introduced due to nonlinearities which occur upon pulse propagation in an optical system.
Reid, Douglas A.   +3 more
core   +2 more sources

Comparison of sequentially measured Aloka echo-tracking one-point pulse wave velocity with SphygmoCor carotid–femoral pulse wave velocity

open access: yesSAGE Open Medicine, 2013
Objectives: Recently, echo-tracking-derived measures of arterial stiffness have been introduced in clinical practice for the assessment of one-point pulse wave velocity.
Olga Vriz   +6 more
doaj   +1 more source

Brachialis Pulse Wave Measurements with Ultra-Wide Band and Continuous Wave Radar, Photoplethysmography and Ultrasonic Doppler Sensors

open access: yesSensors, 2020
The measurement and analysis of the arterial pulse wave provides information about the state of vascular health. When measuring blood pressure according to Riva-Rocci, the systolic and diastolic blood pressure is measured non-invasively with an ...
Horst Hellbrück   +3 more
doaj   +1 more source

Pump-probe detuning dependence of four-wave mixing pulse in an SOA [PDF]

open access: yes, 2007
Four-wave mixing (FWM) between 2-ps pulses in a multiquantum-well semiconductor optical amplifier (SOA) is presented. The conjugate pulses are fully characterized using the frequency-resolved optical gating technique.
Barry, Liam P.   +2 more
core   +2 more sources

Numerical Investigation on the Response Characteristics of Hypersonic Boundary Layer under Different Types of Finite Amplitude Pulse Disturbance Waves

open access: yesJournal of Applied Fluid Mechanics, 2021
The hypersonic transient flow pass a blunt cone under three types of pulse disturbances is calculated using DNS. The response characteristic of hypersonic boundary layer among different types of pulse disturbance is compared.
X. Tang, J. Yu, H. Zhang, H. Li, M. Shi
doaj  

Pulse wave digital processing and beat detection based on wavelet transform and adaptive thresholding

open access: yesJournal of Biomedical Photonics & Engineering, 2015
This paper considers the adaptive algorithm for pulse wave processing in the presence of various physiological interferences, such as motion artefacts and baseline wander.
Aleksandr A. Fedotov   +2 more
doaj   +1 more source

Assessment of pulse rate variability by the method of pulse frequency demodulation

open access: yesBioMedical Engineering OnLine, 2005
Background Due to its easy applicability, pulse wave has been proposed as a surrogate of electrocardiogram (ECG) for the analysis of heart rate variability (HRV). However, its smoother waveform precludes accurate measurement of pulse-to-pulse interval by
Ohte Nobuyuki   +4 more
doaj   +1 more source

Pulse wave response characteristics for thickness and hardness of the cover layer in pulse sensors to measure radial artery pulse

open access: yesBioMedical Engineering OnLine, 2018
Background Piezo-resistive pressure sensors are widely used for measuring pulse waves of the radial artery. Pulse sensors are generally fabricated with a cover layer because pressure sensors without a cover layer are fragile when they come into direct ...
Min-Ho Jun   +3 more
doaj   +1 more source

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