Backscattering in space‐ and time‐dependent random media acoustic intensity fluctuations

2004 ◽  
Vol 115 (5) ◽  
pp. 2570-2570 ◽  
Author(s):  
Shimshon Frankenthal ◽  
Mark J. Beran
Keyword(s):  
Random Media ◽  
Time Dependent ◽  
Acoustic Intensity ◽  
Space And Time ◽  
Intensity Fluctuations

A time-dependent model for high-pressure discharges in narrow ablative capillaries

1993 ◽  
Vol 50 (1) ◽  
pp. 51-70 ◽  
Author(s):  
D. Zoler ◽  
S. Cuperman ◽  
J. Ashkenazy ◽  
M. Caner ◽  
Z. Kaplan
Keyword(s):  
High Pressure ◽  
Equation Of State ◽  
Time Dependent ◽  
Dimensional Model ◽  
Plasma Sources ◽  
One Dimensional ◽  
Space And Time ◽  
Dependent Model ◽  
Energy Equations ◽  
Time Dependent Model

A time-dependent quasi-one-dimensional model is developed for studying high- pressure discharges in ablative capillaries used, for example, as plasma sources in electrothermal launchers. The main features of the model are (i) consideration of ablation effects in each of the continuity, momentum and energy equations; (ii) use of a non-ideal equation of state; and (iii) consideration of space- and time-dependent ionization.

THE TEMPERATURE DISTRIBUTION PRODUCED BY ACOUSTIC ABSORPTION: I. MACROSCOPIC TREATMENT

1966 ◽  
Vol 44 (12) ◽  
pp. 3001-3011 ◽  
Author(s):  
S. Simons
Keyword(s):  
Temperature Distribution ◽  
Acoustic Wave ◽  
Numerical Results ◽  
Time Dependent ◽  
Acoustic Absorption ◽  
Space And Time

A calculation is given of the temperature distribution in space and time produced by the absorption of an acoustic wave propagated inside a medium, under conditions in which the situation may be described macroscopically. The problem is considered for various geometries, and for both constant and time-dependent energies of the incident acoustic wave. Numerical results are obtained, and a discussion is given of their relevance to various experiments.

Extending UML for Space- and Time-Dependent Applications

2011 ◽  
Author(s):  
Rosanne Price ◽  
Nectaria Tryfona ◽  
Christian S. Jensen
Keyword(s):  
Time Dependent ◽  
Space And Time

scholarly journals Pair production from space- and time-dependent strong fields

2015 ◽  
Vol 594 ◽  
pp. 012055
Author(s):  
Dániel Berényi ◽  
Sándor Varró ◽  
Péter Lévai ◽  
Vladimir V Skokov
Keyword(s):  
Pair Production ◽  
Time Dependent ◽  
Strong Fields ◽  
Space And Time

scholarly journals Modelling the trajectory of the corpses of mountaineers who disappeared in 1926 on Aletschgletscher, Switzerland

2014 ◽  
Vol 60 (220) ◽  
pp. 255-261 ◽  
Author(s):  
Guillaume Jouvet ◽  
Martin Funk
Keyword(s):  
Velocity Field ◽  
Weather Conditions ◽  
Space Time ◽  
Severe Weather ◽  
Time Dependent ◽  
Glacier Area ◽  
Glacier Surface ◽  
Space And Time ◽  
End Point

AbstractIn this paper we reconstruct the space–time trajectory beneath the surface of Aletschgletscher, Switzerland, of the corpses of three mountaineers that disappeared in March 1926 and reappeared at the glacier surface in June 2012. Our method integrates the time-dependent velocity field of an existing full-Stokes glacier model, starting at the point where the corpses were found at the glacier surface. Our main result is that we were able to localize the immersion location where the brothers presumably died. As a second result, the upstream end point of the computed trajectory emerges very close to the glacier surface in 1926, giving a new and global validation of the glacier model in space and time. Testing the sensitivity of the immersion location obtained with respect to the model and other uncertainties indicates an area of 0.6% of the entire glacier area where the accident could have occurred. Our result suggests that death was not caused by an avalanche or a fall into a crevasse; instead, it is likely that the mountaineers became disoriented in prolonged severe weather conditions and froze to death.

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