Wave propagation of phonon and phason displacement modes in quasicrystals: Determination of wave parameters

2015 ◽  
Vol 117 (5) ◽  
pp. 054905 ◽  
Author(s):  
Vinita Chellappan ◽  
S. Gopalakrishnan ◽  
V. Mani
2008 ◽  
Vol 23 (2) ◽  
pp. 3-15 ◽  
Author(s):  
Volodymyr Pavlovych ◽  
Volodymyr Khotyayintsev ◽  
Olena Khotyayintseva

The main idea of slow nuclear fission wave reactor is discussed and short review of the existing works is also presented. The aim of this paper is to clarify the physics of processes, which define the stationary wave of nuclear burning, and to develop the approaches determining the wave parameters. It is shown that the diffusion equation for fluence can be used to describe the stationary and non-stationary processes in the nuclear fission wave. Two conditions of stationary wave existence are first formulated in the paper. The rule of determination of wave velocity as the eigenvalue of boundary problem is also formulated.


1986 ◽  
Vol 9 (3) ◽  
pp. 531-540 ◽  
Author(s):  
Arthur D. Gorman

The Lagrange manifold (WKB) formalism enables the determination of the asymptotic series solution of linear differential equations modelling wave propagation in spatially inhomogeneous media at caustic (turning) points. Here the formalism is adapted to determine a class of asymptotic solutions at caustic points for those equations modelling wave propagation in media with both spatial and temporal inhomogeneities. The analogous Schrodinger equation is also considered.


2011 ◽  
Vol 8 (6) ◽  
pp. 1155-1159
Author(s):  
Liu Fan ◽  
Zhao Fengjun ◽  
Deng Yunkai ◽  
Yu Weidong ◽  
Chen Yongqiang ◽  
...  

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