Results 31 to 40 of about 624,198 (294)
Pulse waves in prestressed arteries
Bulletin of Mathematical Biology, 1987 The propagation of waves in an arterial wall which is subjected to large initial inflation and extension is considered. The wall is composed of incompressible, homogeneous, isotropic elastic materials and is sufficiently thick to be regarded as a thick hollow cylinder and not as a thin cylindrical shell.
ERBAY, HA, ERBAY, S, DEMIRAY, H
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Blood Pressure Estimation by Photoplethysmogram Decomposition into Hyperbolic Secant Waves
Applied Sciences, 2022 Photoplethysmographic (PPG) pulses contain information about cardiovascular parameters. In particular, blood pressure can be estimated using PPG pulse decomposition analysis, which assumes that a PPG pulse is composed of the original heart ejection blood
Takumi Nagasawa +7 more
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The Effect of an Angiotensin Receptor Blocker on Arterial Stiffness in Type 2 Diabetes Mellitus Patients with Hypertension [PDF]
Diabetes & Metabolism Journal, 2011 BackgroundHypertension and type 2 diabetes mellitus are major risk factors for cardiovascular disease. This study analyzed the changes in central aortic waveforms and pulse wave velocity as well as related parameters after treatment with valsartan, an ...
Ji Hyun Kim +8 more
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The refractive index and wave vector in passive or active media [PDF]
, 2009 Materials that exhibit loss or gain have a complex valued refractive index $n$. Nevertheless, when considering the propagation of optical pulses, using a complex $n$ is generally inconvenient -- hence the standard choice of real-valued refractive index ...
G. P. Agrawal +3 more
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Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2019 Background Stiffening and calcification of the large arteries are forerunners of cardiovascular complications. MGP (Matrix Gla protein), which requires vitamin K–dependent activation, is a potent locally acting inhibitor of arterial calcification.
Fang‐Fei Wei +11 more
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Self-similar wave breaking in dispersive Korteweg-de Vries hydrodynamics
, 2018 We discuss the problem of breaking of a nonlinear wave in the process of its propagation into a medium at rest. It is supposed that the profile of the wave is described at the breaking moment by the function $(-x)^{1/n}$ ($x0$, negative pulse) of the ...
Kamchatnov, A. M.
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Two improved methods for testing ADC parametric faults by digital input signals [PDF]
, 2009 In this paper, two improved methods are presented extending our previous work. The first one improves the results by adjusting the voltage levels of the input pulse wave stimulus.
Kerkhoff, Hans G., Sheng, Xiaoqin
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Pulse Wave Velocities Derived From Cuff Ambulatory Pulse Wave Analysis [PDF]
Hypertension, 2019 Pulse wave velocity (PWV), a measure of arterial stiffness, is an independent risk factor for cardiovascular morbidity and mortality. We investigated the relationship of ambulatory brachial cuff-based oscillometric PWV (oPWV) to 2 known correlates: age and brachial systolic blood pressure (SBP).
Joseph E. Schwartz +2 more
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Micromachines, 2022 In this paper, we report a new discriminant index for evaluating the wearing condition of a blood pressure pulse wave measurement device with small variability.
Yosuke Osawa, Tetsuji Dohi
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Quantum description of light pulse scattering on a single atom in waveguides [PDF]
, 2002 We present a time dependent quantum calculation of the scattering of a few-photon pulse on a single atom. The photon wave packet is assumed to propagate in a transversely strongly confined geometry, which ensures strong atom-light coupling and allows a ...
A. Rauschenbeutel +22 more
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