Results 211 to 220 of about 77,992 (260)
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Antihypertensive therapy and wave reflections
Prostaglandins, Leukotrienes and Essential Fatty Acids, 1996Studies of pulsatile arterial hemodynamics have emphasized that the pulsatile component of pulse pressure has two important characteristics: (i) it increases from central to peripheral arteries for a similar value of mean arterial pressure, and (ii) it is dominantly influenced by the amplitude and timing of the backward pressure wave.
M E, Safar +3 more
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1987
Consider electromagnetic waves of angular frequency ω, incident on a planar inhomogeneity of thickness (or characterizing length) Δz. When (ω/c)Δz ≫ 1, and at normal incidence, there are many wavelengths within the inhomogeneity and (for smooth profiles) the change in the dielectric function within a wavelength is small. This is known as the short wave
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Consider electromagnetic waves of angular frequency ω, incident on a planar inhomogeneity of thickness (or characterizing length) Δz. When (ω/c)Δz ≫ 1, and at normal incidence, there are many wavelengths within the inhomogeneity and (for smooth profiles) the change in the dielectric function within a wavelength is small. This is known as the short wave
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1987
We have seen in Section 2–2 that the reflection amplitudes of an arbitrary profile tend to the Fresnel values as the thickness Δz of the profile tends to zero. An equivalent limit to consider is that of reflection by a profile of fixed extent, as the wavelength increases.
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We have seen in Section 2–2 that the reflection amplitudes of an arbitrary profile tend to the Fresnel values as the thickness Δz of the profile tends to zero. An equivalent limit to consider is that of reflection by a profile of fixed extent, as the wavelength increases.
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On the Nonspecular Reflection of Electromagnetic Waves
Journal of Applied Physics, 1951The nonspecular reflection of plane electromagnetic waves of arbitrary polarization by certain perfectly conducting surfaces composed of either semicylindrical or hemispherical bosses on an infinite plane is analyzed. Solutions for the problem of the single boss on an infinite plane and a plane wave at an arbitrary angle of incidence are given and ...
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A note on reflection of spherical waves
The Journal of the Acoustical Society of America, 2005In 1909 Sommerfeld gave an exact solution for the reflection of a spherical wave from a plane surface in terms of an oscillatory integral and also presented an asymptotic solution for the case where both source and receiver are at the boundary. Weyl (1919) presented an alternative solution and also an asymptotic solution for the case where the source ...
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Non-uniqueness of reflected and transmitted waves
Mechanics Research Communications, 1996This note discusses the nonuniqueness occurring when elastic waves are transmitted from a medium into a second one, and these media are separated by an interface \(S\). The authors show that for the reflection on a free boundary and for the reflection-transmission with horizontally polarized incident wave, there exist at least two distinct solutions ...
Giacomo Caviglia, MORRO, ANGELO
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1994
This report is Aalborg University's first contribution to the MAS2-CT92 project: Full scale dynamic load monitoring of rubble mound breakwaters.
Helm-Petersen, J., Frigaard, Peter
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This report is Aalborg University's first contribution to the MAS2-CT92 project: Full scale dynamic load monitoring of rubble mound breakwaters.
Helm-Petersen, J., Frigaard, Peter
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Wave Reflection Analysis at a Barred Beach
Coastal Dynamics '01, 200110 ...
TOMASICCHIO, Giuseppe +2 more
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Gradual Reflection of Short Waves
SIAM Journal on Applied Mathematics, 1975Short wave asymptotic methods (geometrical optics, WKB, averaging and two-timing, etc.) fail to give information on the wave reflection caused by gradual variation of propagation speed with position. This paper examines plane wave propagation according to the classical wave equation in a medium of optical index of refraction changing analytically ...
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Reflection Measurement of Low-Reflective Loads at Millimeter Waves
IEEE Transactions on Instrumentation and Measurement, 2016The well-known cross-ratio method of correction of the complex reflection coefficient of low-reflective waveguide one-port devices, which is well established up to 110 GHz, is extended to millimeter wave frequencies where the impedance standard, a quarter-wavelength rectangular waveguide section at midband, may become too thin to be fabricated and ...
Ulrich Stumper +2 more
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