Results 41 to 50 of about 640,436 (346)

Pulse wave analysis with diffusing-wave spectroscopy

Biomedical Optics Express, 2017
Hypertension is a major risk factor for cardiovascular disease and thus at the origin of many deaths by e.g. heart attack or stroke. Hypertension is caused by many factors including an increase in arterial stiffness which leads to changes in pulse wave velocity and wave reflections.
Belau, Markus, Scheffer, Wolfgang, Maret, Georg   +2 more
openaire   +3 more sources

Signal Separation Using a Mathematical Model of Physiological Signals for the Measurement of Heart Pulse Wave Propagation With Array Radar

IEEE Access, 2020
The arterial pulse wave, which propagates along the artery, is an important indicator of various cardiovascular diseases. By measuring the displacement at multiple parts of the human body, pulse wave velocity can be estimated from the pulse transit time.
Takuya Sakamoto
doaj   +1 more source

Modeling the pulse signal by wave-shape function and analyzing by synchrosqueezing transform

, 2016
We apply the recently developed adaptive non-harmonic model based on the wave-shape function, as well as the time-frequency analysis tool called synchrosqueezing transform (SST) to model and analyze oscillatory physiological signals.
Chang, Hen-Hong, Tsai, Tung-Hu, Wang, Chun-Li, Wu, Han-Kuei, Wu, Hau-tieng, Wu, Wen-Hsiang, Yang, Yueh-Lung   +6 more
core   +4 more sources

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, C. J. Hood, C. W. Gardiner, G. Drobný, H. J. Carmichael, Helmut Ritsch, K. J. Blow, K. J. Resch, K. M. Gheri, M. D. Lukin, M. Havukainen, M. W. Mitchell, M. Weidinger, P. G. Kwiat, P. Kochan, P. Törmä, P. W. H. Pinkse, Peter Domokos, Peter Horak, Q. A. Turchette, S. J. van Enk, S. J. van Enk, S. Stenholm   +22 more
core   +2 more sources

Spectral method of photoplethysmogram processing for screening of atherosclerosis

Journal of Biomedical Photonics & Engineering, 2017
The paper is devoted to the analysis of the existing indicators for the diagnostic of arterial vessels condition and the development of new ones based on the contour analysis of the pulse wave. The performed analysis of the techniques used to process the
Anastasiya N. Markina, Aleksandr A. Fedotov   +1 more
doaj   +1 more source

Cerebral microcirculatory pulse wave propagation and pulse wave amplitude mapping in retrospectively gated MRI

Scientific Reports, 2023
To analyze cerebral arteriovenous pulse propagation and to generate phase-resolved pulse amplitude maps from a fast gradient-echo sequence offering flow-related enhancement (FREE).
Norman Kornemann, Filip Klimeš, Agilo Luitger Kern, Lea Behrendt, Andreas Voskrebenzev, Marcel Gutberlet, Mike P. Wattjes, Frank Wacker, Jens Vogel-Claussen, Julian Glandorf   +9 more
doaj   +1 more source

Higher-order corrections to the short-pulse equation

, 2012
Using renormalization group techniques, we derive an extended short- pulse equation as approximation to a nonlinear wave equation. We investigate the new equation numerically and show that the new equation captures efficiently higher- order effects on ...
Agrawal G P, Chung Y, Costanzino N, Erbas K, Kurt L, Levent Kurt, Sakovich A, Sakovich A, Sulem C, Tobias Schäfer, Weiner A M, Yeojin Chung, Zakharov V E   +12 more
core   +1 more source

Influence of Age and Central Hypertension on the Form Factor Needed to Estimate Mean Aortic Pressure, and Its Implications for Pulse Pressure Amplification: A Secondary Data Analysis

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Mean aortic pressure (MAP) plays a pivotal role in both cardiovascular dynamics and the noninvasive estimation of systolic aortic pressure. MAP can be estimated by adding a fraction of the pulse pressure (PP) to the diastolic aortic pressure ...
Denis Chemla, Mathieu Jozwiak, Sandrine Millasseau, Pierre Attal   +3 more
doaj   +1 more source

Brachial-ankle pulse wave velocity and symptomatic cerebral infarction in patients with type 2 diabetes: a cross-sectional study

Cardiovascular Diabetology, 2003
Background Recently a new automatic device that measures brachial-ankle pulse wave velocity using an oscillometric method has been developed. However, the practical significance of brachial-ankle pulse wave velocity measurement remains uncertain.
Muramatsu Chie, Mitsuhashi Naomi, Kubo Sayaka, Onuma Tomio, Ogawa Osamu, Kawamori Ryuzo   +5 more
doaj   +1 more source

Stimulated resonant inelastic x-ray scattering with chirped, broadband pulses

, 2018
We present an approach for initiating and tracing ultra-fast electron dynamics in core-excited atoms, molecules and solids. The approach is based on stimulated resonant inelastic x-ray scattering induced by a single, chirped, broadband XUV/x-ray pulse. A
Hollstein, Maximilian, Rohringer, Nina
core   +2 more sources