Specific multiple-scattering process in acoustic cloak with multilayered homogeneous isotropic materials

2008 ◽  
Vol 104 (10) ◽  
pp. 104911 ◽  
Author(s):  
Ying Cheng ◽  
XiaoJun Liu
Keyword(s):  
Multiple Scattering ◽  
Scattering Process ◽  
Isotropic Materials

scholarly journals The ‘momentum problem’ of Wolf-Rayet stars: can it be explained by the multiple scattering mechanism?

1995 ◽  
Vol 163 ◽  
pp. 170-171 ◽  
Author(s):  
U. Springmann ◽  
J. Puls
Keyword(s):  
Velocity Field ◽  
Multiple Scattering ◽  
Diffuse Radiation ◽  
Radial Dependence ◽  
Scattering Process ◽  
Scattering Mechanism ◽  
Radiative Acceleration

The possibility of driving the dense winds of Wolf-Rayet stars via multiple scattering of photons in resonance lines is examined. For the case of many overlapping lines it is found that the diffuse radiation arising from the multiple scattering process leads to a radiative acceleration grad even larger than the commonly used unattenuated flux models where each line is assumed to interact separately with the unattenuated photospheric flux. The radial dependence of grad in the outer parts of the wind is now weaker than r−2, which in turn leads to a steeper rise in the velocity field.

Using waveform similarity to constrain earthquake locations

1999 ◽  
Vol 89 (4) ◽  
pp. 1143-1146 ◽  
Author(s):  
William Menke
Keyword(s):  
Travel Time ◽  
Multiple Scattering ◽  
Cross Correlation ◽  
Relative Location ◽  
Travel Times ◽  
Scattering Process ◽  
Earthquake Relocation ◽  
Earthquake Locations ◽  
Waveform Similarity ◽  
The Cross

Abstract We demonstrate that the numerical value of the cross-correlation between P or S waveforms, commonly computed to determine differential travel times for earthquake relocation, itself contains useful information about the relative location of the events. This information can be used to supplement traditional travel-time inversions (especially when few stations are available) and to investigate the heterogeneity that underlies the multiple scattering process.

Reciprocity and Shape Functions in Multiple Scattering Diagrams

1972 ◽  
Vol 27 (3) ◽  
pp. 437-440 ◽  
Author(s):  
A. F. Moodie
Keyword(s):  
Multiple Scattering ◽  
Scattering Amplitude ◽  
Divided Differences ◽  
Arbitrary Orientation ◽  
Scattering Process ◽  
Shape Functions ◽  
Fast Electrons

Abstract The scattering amplitude for fast electrons diffracted from a plate of crystal is analyzed in terms of multiple scattering diagrams. It is shown that to every individual scattering process in an arbitrary orientation there exists a process in the reciprocity configuration equal in amplitude and phase, that is, to every diagram there corresponds a reciprocal diagram.It is shown that the geometric part of the diagram may be expressed in terms of the divided differences of the kinematic shape transform.

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