Spatially and Temporally Modulated Traveling-Wave Pattern in Convecting Binary Mixtures

1988 ◽  
Vol 61 (7) ◽  
pp. 838-841 ◽  
Author(s):  
Jay Fineberg ◽  
Elisha Moses ◽  
Victor Steinberg
Keyword(s):  
Binary Mixtures ◽  
Traveling Wave ◽  
Wave Pattern

Nonlinear theory of traveling wave convection in binary mixtures

1989 ◽  
Vol 50 (20) ◽  
pp. 3089-3108 ◽  
Author(s):  
D. Bensimon ◽  
A. Pumir ◽  
B.I. Shraiman
Keyword(s):  
Binary Mixtures ◽  
Nonlinear Theory ◽  
Traveling Wave

scholarly journals Improving the reliability of combined overhead and cable power lines by organizing smart autoreclosing

2019 ◽  
Vol 139 ◽  
pp. 01062
Author(s):  
Pavel Pelevin ◽  
Anton Loskutov ◽  
Timur Sharafeev
Keyword(s):  
Power System ◽  
Pattern Classification ◽  
Traveling Waves ◽  
Traveling Wave ◽  
Wave Pattern ◽  
Power Lines ◽  
Power System Protection ◽  
System Protection ◽  
Special Procedure

The application of combined overhead and cable power lines (OCPLs) of 110 kV voltage rate and higher call for new features for power system protection and automation devices. One of the most urgent is the problem of autoreclosing (AR) of OCPL. One or another solution to this problem significantly affects the reliability and efficiency of the OCPL operating. In many countries, both non-selective AR and selective AR are used. A method of selective AR of OCPL based on traveling waves is proposed, which increases the reliability of OCPL protection and automation. The method uses a special procedure of traveling wave pattern classification for faulted section identification.

scholarly journals Alternans and Spiral Breakup in an Excitable Reaction-Diffusion System: A Simulation Study

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
M. Osman Gani ◽  
Toshiyuki Ogawa
Keyword(s):  
Traveling Wave ◽  
Spiral Wave ◽  
Traveling Wave Solutions ◽  
Reaction Diffusion ◽  
Wave Pattern ◽  
Two Dimensions ◽  
Traveling Wave Solution ◽  
Excitable Media ◽  
Spatiotemporal Pattern ◽  
Spiral Pattern

The determination of the mechanisms of spiral breakup in excitable media is still an open problem for researchers. In the context of cardiac electrophysiological activities, spiral breakup exhibits complex spatiotemporal pattern known as ventricular fibrillation. The latter is the major cause of sudden cardiac deaths all over the world. In this paper, we numerically study the instability of periodic planar traveling wave solution in two dimensions. The emergence of stable spiral pattern is observed in the considered model. This pattern occurs when the heart is malfunctioning (i.e., ventricular tachycardia). We show that the spiral wave breakup is a consequence of the transverse instability of the planar traveling wave solutions. The alternans, that is, the oscillation of pulse widths, is observed in our simulation results. Moreover, we calculate the widths of spiral pulses numerically and observe that the stable spiral pattern bifurcates to an oscillatory wave pattern in a one-parameter family of solutions. The spiral breakup occurs far below the bifurcation when the maximum and the minimum excited states become more distinct, and hence the alternans becomes more pronounced.

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