TRANSMISSION AND REFLECTION OF RAYLEIGH WAVES AT CORNERS

Geophysics ◽  
1958 ◽  
Vol 23 (2) ◽  
pp. 253-266 ◽  
Author(s):  
J. Cl. de Bremaecker
Keyword(s):  
Surface Wave ◽  
Rayleigh Wave ◽  
Rayleigh Waves ◽  
Body Waves ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Reflection And Transmission ◽  
Two Dimensional Model ◽  
Model Seismology ◽  
Transmission And Reflection

The methods of two dimensional model seismology were used to investigate the phenomena occurring when a Rayleigh wave is incident upon a corner whose angle is comprised between 0° and 180°. The wave bends its path only for angles between 130° and 180°. For smaller angles large and abrupt variations in reflection and transmission occur; the wave travels to the extremity of the corner and never “cuts corners”; only about 50 percent of the energy of the indicent surface wave is preserved as such, the rest goes into body waves; for a 90° corner the proportion is about 23 percent in P and 26 percent in S, with sharply preferential angles of incidence. The percentages given were found for a “plate Poisson’s ratio” of 0.17.

Model study of explosion-generated Rayleigh waves in a half space

1964 ◽  
Vol 54 (2) ◽  
pp. 475-484
Author(s):  
I. N. Gupta ◽  
C. Kisslinger
Keyword(s):  
Rayleigh Wave ◽  
Half Space ◽  
Rayleigh Waves ◽  
Radial Component ◽  
Two Dimensional ◽  
Source Depth ◽  
Dimensional Model ◽  
Retrograde Motion ◽  
Model Study ◽  
Two Dimensional Model

ABSTRACT The Rayleigh waves generated by an explosion on or in the interior of a two-dimensional model show that the source acts as a downward impulse when the shot is on or just below the surface, and as a buried source of compression for deeper shots. The seismograms are in agreement with established theory for the line source on or in a half-space. The source depth corresponding to the reversal of polarity of the Rayleigh wave is small, and appears to be equal to the radius of the zone of inelastic failure around the shot. The polarity reversal is a true indication of a change in the mechanism of Rayleigh wave generation, and is not related to the change from retrograde motion at the free surface to prograde motion in the interior associated with the change in sign of the radial component at depth.

Component registration in two-dimensional model seismology

1966 ◽  
Vol 10 (3) ◽  
pp. 314-322 ◽  
Author(s):  
Rolf Gutdeutsch ◽  
Manfred Koenig
Keyword(s):  
Two Dimensional ◽  
Dimensional Model ◽  
Two Dimensional Model ◽  
Model Seismology

Theoretical investigation of scattering phenomena inside wedge caused by incidence of Rayleigh wave

1984 ◽  
Vol 74 (5) ◽  
pp. 1593-1603
Author(s):  
Shozaburo Takeuchi ◽  
Kazunari Fujii ◽  
Masayoshi Nakano
Keyword(s):  
Theoretical Analysis ◽  
Rayleigh Wave ◽  
Theoretical Investigation ◽  
Rayleigh Waves ◽  
Wedge Angle ◽  
Scattered Wave ◽  
Generation Process ◽  
Two Dimensional ◽  
Reflection And Transmission ◽  
Transmission Coefficients

Abstract A theoretical analysis is performed on the behaviors of the internal scattered wave in the case where a two-dimensional plane Rayleigh wave is incident to an acute- or obtuse-angled wedge. By using the theory in our preceding research (1984), the distributions of energy densities and lines of constant phase of scattered wave are obtained inside the wedge when its angle of corner ranges from 71° to 109°. Momoi's conception (1980) of generation process of reflected and transmitted Rayleigh waves is applied to the above numerically calculated results, by which the complicated variations of reflection and transmission coefficients with wedge angle could be explained to some extent.

Commitment to pro- versus counter-attitudinal behavior and the dynamics of social representations

2002 ◽  
Vol 61 (1) ◽  
pp. 34-44 ◽  
Author(s):  
Eric Tafani ◽  
Lionel Souchet
Keyword(s):  
Higher Education ◽  
Social Representations ◽  
Cognitive Restructuring ◽  
Social Representation ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Social Actions ◽  
The Social ◽  
Two Dimensional Model ◽  
Students Attitudes

This research uses the counter-attitudinal essay paradigm ( Janis & King, 1954 ) to test the effects of social actions on social representations. Thus, students wrote either a pro- or a counter-attitudinal essay on Higher Education. Three forms of counter-attitudinal essays were manipulated countering respectively a) students’ attitudes towards higher education; b) peripheral beliefs or c) central beliefs associated with this representation object. After writing the essay, students expressed their attitudes towards higher education and evaluated different beliefs associated with it. The structural status of these beliefs was also assessed by a “calling into question” test ( Flament, 1994a ). Results show that behavior challenging either an attitude or peripheral beliefs induces a rationalization process, giving rise to minor modifications of the representational field. These modifications are only on the social evaluative dimension of the social representation. On the other hand, when the behavior challenges central beliefs, the same rationalization process induces a cognitive restructuring of the representational field, i.e., a structural change in the representation. These results and their implications for the experimental study of representational dynamics are discussed with regard to the two-dimensional model of social representations ( Moliner, 1994 ) and rationalization theory ( Beauvois & Joule, 1996 ).

Unwilling to initiate or willing to avoid the decision process: A two-dimensional model predicting decision process avoidance

2007 ◽  
Author(s):  
Ilona M. McNeill ◽  
Bernard A. Nijstad ◽  
Michel J. J. Handgraaf ◽  
Carsten K. W. De Dreu
Keyword(s):  
Decision Process ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Two Dimensional Model
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