On the stability of homogeneous orientation in the plane-parallel cell of a liquid crystal doped with nanoparticles

2014 ◽  
Vol 49 (5) ◽  
pp. 196-201 ◽  
Author(s):  
M. R. Hakobyan ◽  
A. A. Ghandevosyan ◽  
R. S. Hakobyan ◽  
Yu. S. Chilingaryan
Keyword(s):  
Liquid Crystal ◽  
Plane Parallel ◽  
The Stability

scholarly journals Gravitational and Dynamical Instabilities of a Decelerating Plane-Parallel Slab of Finite Thickness

1988 ◽  
Vol 101 ◽  
pp. 509-512
Author(s):  
G. Mark Voit
Keyword(s):  
Star Formation ◽  
Interstellar Medium ◽  
Incompressible Fluid ◽  
Gravity Wave ◽  
Finite Thickness ◽  
Blast Waves ◽  
Plane Parallel ◽  
The Stability ◽  
Dynamical Instabilities ◽  
Symmetric And Antisymmetric Modes

AbstractIn order to explore how supernova blast waves might catalyze star formation, we investigate the stability of a slab of decelerating gas of finite thickness. We examine the early work in the field by Elmegreen and Lada and Elmegreen and Elmegreen and demonstrate that it is flawed. Contrary to their claims, blast waves can indeed accelerate the rate of star formation in the interstellar medium. Also, we demonstrate that in an incompressible fluid, the symmetric and antisymmetric modes in the case of zero acceleration transform continuously into Rayleigh-Taylor and gravity-wave modes as acceleration grows more important.

HOLOGRAPHIC GRATING DESIGNED FOR THE STABILITY CONTROL OF AN ACTIVE INTERFEROMETRIC SETUP

2011 ◽  
Vol 20 (01) ◽  
pp. 15-21 ◽  
Author(s):  
LUCIANO DE SIO ◽  
ALESSANDRO VELTRI ◽  
CESARE UMETON
Keyword(s):  
Liquid Crystal ◽  
Interference Pattern ◽  
Nematic Liquid Crystal ◽  
Low Cost ◽  
Feedback System ◽  
Stability Control ◽  
Holographic Grating ◽  
Transmission Grating ◽  
Active Feedback ◽  
The Stability

We report on the design of a particular holographic grating to be exploited for the stability control of an active optical holographic setup. The low-cost transmission grating made of alternating slices of pure polymer slices and pure nematic liquid crystal is used as a reference grating for the active feedback system that enables the interference patterns stabilization. The stability test of the interference pattern confirms the effectiveness of the proposed technique.

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