Results 11 to 20 of about 498,988 (364)
Superluminal optical pulse propagation in nonlinear coherent media [PDF]
, 2002 The propagation of light-pulse with negative group-velocity in a nonlinear medium is studied theoretically. We show that the necessary conditions for these effects to be observable are realized in a three-level $\Lambda$-system interacting with a linearly polarized laser beam in the presence of a static magnetic field.
A. Dogariu +31 more
arxiv +4 more sources
Distinct stick-slip modes in adhesive polymer interfaces [PDF]
Wear 376, 1271-1278, 2017, 2017 Stick-slip, manifest as intermittent tangential motion between two solids, is a well-known friction instability that occurs in a number of natural and engineering systems. In the context of adhesive polymer interfaces, this phenomenon has often been solely associated with Schallamach waves, which are termed slow waves due to their low propagation ...
Sundaram, Narayan K. +1 more
arxiv +3 more sources
Numerical Modeling of Pulse Wave Propagation in a Stenosed Artery using Two-Way Coupled Fluid Structure Interaction (FSI) [PDF]
arXiv, 2018 As the heart beats, it creates fluctuation in blood pressure leading to a pulse wave that propagates by displacing the arterial wall. These waves travel through the arterial tree and carry information about the medium that they propagate through as well as information of the geometry of the arterial tree.
Gamage, Peshala P. T +2 more
arxiv +3 more sources
Pulmonary pulse wave velocity as assessed with velocity-encoded MRI [PDF]
Journal of Cardiovascular Magnetic Resonance, 2012 Pulmonary pulse wave velocity has proven to be an excellent indicator of pulmonary vascular wall stiffness. In this study a novel MRI method was evaluated, showing rapid assessment of pulmonary pulse wave velocity with excellent repeatability and observer reproducibility.
Grotenhuis Heynric +3 more
doaj +3 more sources
Determinants of aortic stiffness: 16-year follow-up of the Whitehall II study. [PDF]
PLoS ONE, 2012 BACKGROUND:Aortic stiffness is a strong predictor of cardiovascular disease endpoints. Cross-sectional studies have shown associations of various cardiovascular risk factors with aortic pulse wave velocity, a measure of aortic stiffness, but the long ...
Nanna B Johansen +10 more
doaj +6 more sources
Sensors, 2020 Arterial stiffness is considered an index of vascular aging. The brachial–ankle pulse wave velocity (baPWV) method is widely used because of its proven effectiveness; and the pulse wave velocity measurement method using both electrocardiogram (ECG) and ...
Jaegeol Cho, Hyun Jae Baek
doaj +3 more sources
Global distributions of age- and sex-related arterial stiffness: systematic review and meta-analysis of 167 studies with 509,743 participants [PDF]
, 2023 Background: Arterial stiffening is central to the vascular ageing process and a powerful predictor and cause of diverse vascular pathologies and mortality.
Kiechl, Sophia J +6 more
core +4 more sources
Hemodynamic Data Analysis and Site of Measurement in Children and Adolescents
Artery Research, 2020 Pulse wave velocity is a method of functional vascular evaluation. The gold standard is the carotid-femoral pulse wave velocity measurement. However, the software allows measurement among radial, carotid and femoral artery.
Mirjam Močnik, Nataša Marčun Varda
doaj +1 more source
Physiological 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
Biomedicines, 2021 Primary aldosteronism (PA) is associated with higher arterial stiffness compared to essential hypertension (EH). However, few studies have compared different pulse wave velocity (PWV) parameters to detect aldosterone-induced arterial stiffness.
Zheng-Wei Chen +13 more
doaj +1 more source