Results 251 to 260 of about 435,363 (293)
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Nature, 1954
ONE of us1 has noted that the velocity of electrons has never been measured under conditions which allow no alternative interpretation. A linear velocity of displacement is a necessary inference only where two successive events, departure and arrival, have been observed which are localized and distinct, both in space and in time.
L. L. WHYTE, D. L. RICHARDS, D. GABOR
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ONE of us1 has noted that the velocity of electrons has never been measured under conditions which allow no alternative interpretation. A linear velocity of displacement is a necessary inference only where two successive events, departure and arrival, have been observed which are localized and distinct, both in space and in time.
L. L. WHYTE, D. L. RICHARDS, D. GABOR
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Pulse Wave Velocity in Kawasaki Disease
Angiology, 2016Kawasaki disease (KD) is an acute childhood febrile disease of unknown etiology. It exhibits not only coronary artery aneurysms in some cases but also systemic vasculitis. Whether KD is associated with accelerated atherosclerosis remains debatable. The measurement of pulse wave velocity (PWV) is useful as a simple, noninvasive measurement of arterial ...
Yoshitaka, Iwazu +2 more
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Pulse wave velocities in the aorta
Bulletin of Mathematical Biology, 1984This paper is an analytical study on the pulse wave velocities in the aorta. In conformity to a physiologic state of loading, the distensibility of the vessel wall has been accounted for. The wall material is treated by using the theory of large elastic deformations. The orthotropicity of wall tissues and the effect of the surrounding tissues have been
Misra, J. C., Singh, S. I.
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Rinsho byori. The Japanese journal of clinical pathology, 2004
Pulse wave velocity (PWV) reflects arterial stiffness. PWV correlates with other markers reflecting the severity of atherosclerosis such as the findings of ultrasound examination of carotid artery. In addition, several studies demonstrated that increased PWV is a predictor of future cardiovascular events in patients with either hypertension or diabetes
Hirofumi, Tomiyama, Akira, Yamashina
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Pulse wave velocity (PWV) reflects arterial stiffness. PWV correlates with other markers reflecting the severity of atherosclerosis such as the findings of ultrasound examination of carotid artery. In addition, several studies demonstrated that increased PWV is a predictor of future cardiovascular events in patients with either hypertension or diabetes
Hirofumi, Tomiyama, Akira, Yamashina
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Velocity‐selective RF pulses in MRI
Magnetic Resonance in Medicine, 2005AbstractA family of velocity‐selective pulses consisting of a series of RF hard pulses followed by bipolar gradients was designed. The succession of required pulses was deduced using a k‐space approach within a small tip‐angle approximation. Fourier transform of the desired velocity excitation determined the flip‐angle series, and the corresponding ...
Ludovic, de Rochefort +3 more
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Velocity Coupling from Pulse-Test Firings
Journal of Propulsion and Power, 2010There has been much dispute about triggering of non-linear combustion instability(CI). The norm has been to use ad hoc models to include second order combustion terms most notably velocity coupling. This term arose due to classical linear analyses predicting stable motors necessitating another driving function. However there is no practical universally
Rousseau C.W., Knoetze J.H.
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Nihon rinsho. Japanese journal of clinical medicine, 2004
Brachial-ankle pulse wave velocity(baPWV) is a noninvasive and simple method of measuring arterial stiffness and an independent predictor of cardiovascular mortality in some lifestyle-related diseases. We evaluated that baPWV is well correlated with many atherosclerotic risk factors including abdominal visceral obesity and HOMA, and that the ...
Sanae, Harada, Kazuo, Takeda
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Brachial-ankle pulse wave velocity(baPWV) is a noninvasive and simple method of measuring arterial stiffness and an independent predictor of cardiovascular mortality in some lifestyle-related diseases. We evaluated that baPWV is well correlated with many atherosclerotic risk factors including abdominal visceral obesity and HOMA, and that the ...
Sanae, Harada, Kazuo, Takeda
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Pulse Modulation Effect on Velocity Fringes
Applied Optics, 1975The degradation of a hologram caused by object motion can be utilized to measure the rate of change of the length of an object beam. A rectangular shaped laser pulse is ordinarily used to illuminate the object in such an investigation. The velocity fringes obtained are considered in the calculation.
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Dispersive pulse dynamics and associated pulse velocity measures
Journal of Optics A: Pure and Applied Optics, 2002The classical theory of dispersive signal propagation by Sommerfeld and Brillouin proposed in 1914 provided the first proof within the classical Maxwell–Lorentz theory that an electromagnetic signal could not propagate faster than the vacuum speed of light in a causal dielectric, also introducing the signal velocity and the precursor fields (or ...
Kurt Edmund Oughstun +1 more
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Pulse Wave Velocity Techniques
2019Recently, pulse wave velocity (PWV), or its reciprocal pulse transit time (PTT), has been intensively investigated as a promising technique for continuous, cuffless, and noninvasive blood pressure (BP) monitoring. BP is mathematically derived through PTT, or the “time delay” in propagation of pressure waves in the vascular system, which can be easily ...
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