Results 21 to 30 of about 896,915 (412)

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, A. Lezama, A.M. Akulshin, A.M. Steinberg, A.M. Steinberg, A.Yu. Andreev, B. Segard, C. Liu, C.G.B. Garrett, D. Budker, D. Budker, D. Grischkowsky, D. Grischkowsky, D.F. Phillips, D.L. Fisher, E.L. Bolda, G. Diener, G. Diener, G. Kurizki, L.J. Wang, L.V. Hau, M. Blaauboer, M.M. Kash, N.G. Basov, R.Y. Chiao, R.Y. Chiao, Ruben G. Ghulghazaryan, S. Chu, S.E. Harris, S.E. Harris, V.A. Sautenkov, Yuri P. Malakyan   +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., Viswanathan, Koushik   +1 more
arxiv   +3 more sources

Novel Methods for Pulse Wave Velocity Measurement [PDF]

Journal of Medical and Biological Engineering, 2015
The great incidence of cardiovascular (CV) diseases in the world spurs the search for new solutions to enable an early detection of pathological processes and provides more precise diagnosis based in multi-parameters assessment. The pulse wave velocity (PWV) is considered one of the most important clinical parameters for evaluate the CV risk, vascular ...
Carlos Correia, Tânia Pereira, João Cardoso   +2 more
openaire   +4 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, Khalili, Fardin, Mansy, Hansen A   +2 more
arxiv   +3 more sources

Estimated pulse wave velocity and cardiovascular events in Chinese

International Journal of Cardiology. Hypertension, 2020
The estimated pulse-wave velocity (ePWV) as measure for arterial wall stiffness is associated with an increased risk of cardiovascular disease (CVDs) and all-cause death in Western populations.
Chunpeng Ji, Jingli Gao, Zhe Huang, Shuohua Chen, Guodong Wang, Shouling Wu, Jost B. Jonas   +6 more
doaj   +2 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, Stomp Wouter, Westenberg Jos J, de Roos Albert   +3 more
doaj   +3 more sources

A Comparative Study of Brachial–Ankle Pulse Wave Velocity and Heart–Finger Pulse Wave Velocity in Korean Adults

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

Pulse Wave Velocity Predicts Response to Renal Denervation in Isolated Systolic Hypertension

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2017
BackgroundRenal sympathetic denervation seems to be less effective as a treatment for hypertension in patients with isolated systolic hypertension, a condition associated with elevated central arterial stiffness.
Karl Fengler, Karl‐Philipp Rommel, Robert Hoellriegel, Stephan Blazek, Christian Besler, Steffen Desch, Gerhard Schuler, Axel Linke, Philipp Lurz   +8 more
doaj   +2 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, Kiechl, Stefan, Lu, Yao, Pechlaner, Raimund, The Global Pulse Wave Velocity Study Group, Wang, Jie, Xu, Qingbo   +6 more
core   +4 more sources

Estimated pulse wave velocity as a measure of vascular aging

PLoS ONE, 2023
Background Carotid-femoral pulse wave velocity (cfPWV), the referent measure of aortic stiffness, is an established measure of vascular aging. In studies where cfPWV cannot be measured, alternative methods are needed to help promote research on vascular ...
K. Heffernan, Lee Stoner, A. London, J. Augustine, W. Lefferts   +4 more
semanticscholar   +1 more source