Results 241 to 250 of about 1,478,939 (299)
Some of the next articles are maybe not open access.
Surface Wave Velocity Measurement
Nature, 1966I HAVE found1 that surface wave velocities can be conveniently and accurately derived by measuring a critical angle at which, when an ultrasonic beam is reflected from a solid surface in a water bath, there is a violent change in the waveform of the reflected wave train.
openaire +3 more sources
Surface plasmon interferometry: measuring group velocity of surface plasmons
Optics Letters, 2007Optical transmission spectroscopy on metal films with slit-groove pairs is conducted. Spectra of the light transmitted through the slit exhibit Fabry-Perot-type interference fringes due to surface plasmons propagating between the slit and the groove. The spectral dependence of the period of interference fringes is used to determine the group velocity ...
Vasily V, Temnov +4 more
openaire +2 more sources
Propagation Velocity of Surface Polariton
Frontiers in Optics 2014, 2014The concept of irreversible and reversible powers and that of real and reactive powers are developed with particular reference to the surface polariton. The characteristics of the surface polariton excited by a current source are obtained. The limitations of the various propagation velocities are examined.
openaire +2 more sources
Velocity inversion and predicting velocity slip on curved surfaces
AIP Conference Proceedings, 2012Couette flow between two concentric rotating cylinders is a classical fluid dynamics problem that is discussed in many textbooks. However, under certain conditions, the flow between the cylinders can exhibit a highly non-intuitive behavior. For example, when the inner cylinder is rotating and the outer cylinder is stationary, it is possible to obtain ...
Ali Dinler +3 more
openaire +1 more source
Violin surface velocities and radiativity
The Journal of the Acoustical Society of America, 2018Complete surface velocity maps and radiativity measurements have been made of several violins of varying quality. The instruments were excited laterally at the top of the bridge with a small impact hammer, giving a strong signal up to 4 kHz. The wood velocities were measured with a 0.2 g accelerometer placed sequentially on a grid, all over the surface.
Chironjeev Kanjilal, Chris Waltham
openaire +1 more source
Surface Wave Velocities Across Arabia
Pure and Applied Geophysics, 2001The group-velocity distribution beneath the Arabian Plate is investigated using Love and Rayleigh waves. We obtained a balanced path coverage using seismograms generated by earthquakes located along the plate boundaries. We measured Love- and Rayleigh-wave group-velocity dispersion using multiple filter analysis and then performed a tomographic ...
T. A. Mokhtar +3 more
openaire +1 more source
Velocities for moving random surfaces
Probabilistic Engineering Mechanics, 2003For a stationary two-dimensional random field evolving in time, we derive statistical distributions of appropriately defined velocities. The results are based on a generalization of the Rice formula. We discuss importance of identifying the correct form of the distribution which accounts for the sampling bias.
Baxevani, Anastassia +5 more
openaire +2 more sources
Ocean Surface Drift Velocities
Journal of Physical Oceanography, 1977Abstract Symmetry considerations indicate that in steady-state conditions, and in the absence of a sea current, a horizontal interface must move in the direction of the surface geostrophic wind. With currents present, the interface velocity is the vector mean of the surface geostrophic wind and the current velocity, weighted respectively by the fluid ...
openaire +1 more source