Results 41 to 50 of about 229,628 (276)
Variations of VLF Wave Intensity Analyzed via Principal Component Analysis [PDF]
, 2021 International audienceWave intensity measured in the very low frequency (VLF) range (up to 20 kHz) is typically represented using frequency-time spectrograms.
Němec, František +4 more
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Physiological Reports, 2021 We explored the use of the augmentation index (AI) based on pulse wave analysis (PWA) in the pulmonary circulation as a measure of wave reflection and arterial stiffness in individuals with and without pulmonary arterial hypertension (PAH) and chronic ...
Junjing Su +5 more
doaj +1 more source
Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2018 Background Cold air inhalation during exercise increases cardiac mortality, but the pathophysiology is unclear. During cold and exercise, dual‐sensor intracoronary wires measured coronary microvascular resistance (MVR) and blood flow velocity (CBF), and ...
Rupert P. Williams +17 more
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Frontiers in Physiology, 2020 Increased wave reflection is an independent predictor of cardiovascular events, possibly due to effects on left ventricular (LV) function. We investigated the relationship between reflected waves in early systole, the forward decompression wave in mid ...
Chloe M. Park +5 more
doaj +1 more source
Simultaneous determination of wave speed and arrival time of reflected waves using the pressure-velocity loop [PDF]
, 2007 This is the post print version of the article. The official published version can be found at the link below.In a previous paper we demonstrated that the linear portion of the pressure–velocity loop (PU-loop) corresponding to early systole could be used ...
J. Feng +7 more
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3.5 NON-INVASIVE US-BASED WAVE INTENSITY ANALYSIS IN MICE
Artery Research, 2016 Wave Intensity Analysis (WIA) can provide information about the interaction between vascular and cardiac system. WIA-derived indexes have quantitative physiological meaning.
Nicole Di Lascio +4 more
doaj +1 more source
Wave intensity analysis. [PDF]
, 2019 A: Carotid arterial pressure- and flow velocity waveforms of the reference (REF–TL) and hypertensive (HYP–TL) simulations, and corresponding wave intensity traces.
Maarten H. G. Heusinkveld (6954413) +5 more
core +1 more source
Dynamical energy analysis on mesh grids: a new tool for describing the vibro-acoustic response of complex mechanical structures [PDF]
, 2014 We present a new approach for modelling noise and vibration in complex mechanical structures in the mid-to-high frequency regime. It is based on a dynamical energy analysis (DEA) formulation which extends standard techniques such as statistical energy ...
Chappell, DJ +7 more
core +1 more source
Nonlinearity and Noise Effects in Multi-level Signal Millimeter-Wave over Fiber Transmission using Single- and Dual-Wavelength Modulation [PDF]
, 2010 We transmit multilevel quadrature amplitude modulation (QAM) data-IEEE 802.16 schemes-at 20 MSps and an orthogonal frequency-division multiplexing (OFDM) 802.11 g signal (54 Mbps) with a 25 GHz millimeter-wave over fiber system, which employs a dual ...
Jeanne James +9 more
core +1 more source
Gravity wave turbulence in a laboratory flume [PDF]
, 2007 We present an experimental study of the statistics of surface gravity wave turbulence in a flume of a horizontal size 12×6 m. For a wide range of amplitudes the wave energy spectrum was found to scale as Eω∼ω-ν in a frequency range of up to one decade ...
Nazarenko, Sergey +2 more
core +1 more source