Polarization of He II films upon the relative motion of the superfluid component and the quantized vortices

2016 ◽  
Vol 42 (4) ◽  
pp. 258-264 ◽  
Author(s):  
I. N. Adamenko ◽  
E. K. Nemchenko
Keyword(s):  
Relative Motion ◽  
Quantized Vortices ◽  
Superfluid Component

An introduction to quantum turbulence

2008 ◽  
Vol 366 (1877) ◽  
pp. 2925-2933 ◽  
Author(s):  
W.F Vinen
Keyword(s):  
Low Temperature ◽  
Rotational Motion ◽  
Quantum Turbulence ◽  
Cosmic Strings ◽  
Topological Defects ◽  
Dynamical Behaviour ◽  
Quantized Vortices ◽  
Superfluid Component ◽  
Very Low Temperature

This paper provides a brief introduction to quantum turbulence in simple superfluids, in which the required rotational motion in the superfluid component is due entirely to the topological defects that are identified as quantized vortices. Particular emphasis is placed on the basic dynamical behaviour of the quantized vortices and on turbulent decay mechanisms at a very low temperature. There are possible analogies with the behaviour of cosmic strings.

The restoration of blurred electron micrographs

1986 ◽  
Vol 44 ◽  
pp. 180-181
Author(s):  
Bridget Carragher ◽  
David A. Bluemke ◽  
Michael J. Potel ◽  
Robert Josephs
Keyword(s):  
Cross Section ◽  
Electron Micrographs ◽  
Relative Motion ◽  
Finite Thickness ◽  
Image Plane ◽  
Helical Axis ◽  
Thin Sections ◽  
Structural Details

We have investigated the feasibility of restoring blurred electron micrographs. Two related problems have been considered; the restoration of images blurred as a result of relative motion between the specimen and the image plane, and the restoration of images which are rotationally blurred about an axis. Micrographs taken while the specimen is drifting result in images which are blurred in the direction of motion. An example of rotational blurring arises in micrographs of thin sections of helical particles viewed in cross section. The twist of the particle within the finite thickness of the section causes the image to appear rotationally blurred about the helical axis. As a result, structural details, particularly at large distances from the helical axis, will be obscured.

Sign in / Sign up

Export Citation Format

Share Document