Results 211 to 220 of about 45,936 (263)

Perception of tilt following counter-rotation surgery

Clinical and Experimental Ophthalmology, 2010
AbstractBackground:  Macular translocation surgery (MTS) is one of the treatment options for age‐related macular degeneration (AMD) followed by counter‐rotation surgery (CRS) to correct the resulting tilt. The objective of this paper is to determine the perception of tilt following CRS and identify factors that influence the perception of tilt in the ...
David Wong, Damian Farnell, Jignasa Mehta   +2 more
exaly   +5 more sources

Two counter-rotating diffusing vortices

Physics of Fluids, 1995
The problem of the diffusion of two counter-rotating vortices of equal strength is studied numerically and analytically. Asymptotic expansions are derived for the limiting behavior of the solution for small times, for small Reynolds numbers, and for large times.
van Dommelen, Leon, Shankar, Subramaniam
openaire   +2 more sources

Spotting a counter-rotating galaxy

Proceedings of the International Astronomical Union, 2019
AbstractThe presence of counter-rotating (CR) components in galaxies is not that rare but their origin is still unclear. Important clues to the formation and evolution of CR galaxies are provided by galaxy kinematics, such as the mass distribution and the shape of the gravitational potential. In order to better understand the origin and incidence of CR
Michela Rubino, Alessandro Pizzella, Lorenzo Morelli   +2 more
openaire   +1 more source

Counter-Rotating Propellers

The Journal of the Royal Aeronautical Society, 1940
AbstractThis paper is concerned mainly with that application of counter-rotating propellers referred to as “ dual-rotation ” propellers. This term is here defined to apply to a pair of oppositely-rotating propellers operating in close tandem, mounted on concentric shafts.
openaire   +1 more source

A row of counter-rotating vortices

Physics of Fluids A: Fluid Dynamics, 1993
In 1967, Stuart [J. Fluid Mech. 29, 417 (1967)] found an exact nonlinear solution of the inviscid, incompressible two-dimensional Navier–Stokes equations, representing an infinite row of identical vortices which are now known as Stuart vortices. In this Brief Communication, the corresponding result for an infinite row of counter-rotating vortices, i.e.,
Mallier, R., Maslowe, S. A.
openaire   +1 more source

Counter-rotating microplates at the Galapagos triple junction

Nature, 2005
An 'incipient' spreading centre east of (and orthogonal to) the East Pacific Rise at 2 degrees 40' N has been identified as forming a portion of the northern boundary of the Galapagos microplate. This spreading centre was described as a slowly diverging, westward propagating rift, tapering towards the East Pacific Rise.
Emily M, Klein, Deborah K, Smith, Clare M, Williams, Hans, Schouten   +3 more
openaire   +2 more sources

Counter-Rotating Ring Currents in Coronene and Corannulene

Angewandte Chemie International Edition, 2001
Explicit ab initio current-density maps contradict the annulene-within-an-annulene model of [n]circulenes: in both coronene and corannulene the expected diamagnetic current on the perimeter is opposed by the central, paramagnetic ring current.
Steiner, E., Fowler, P.W., Jenneskens, L.W.   +2 more
openaire   +3 more sources

Diffractively corrected counter-rotating Risley prisms

Applied Optics, 2015
Using the vector refraction equation and the vector diffraction equation, we obtain the expressions of the direction cosines of the refractive rays for the two wedge prisms, and the direction cosines of the diffractive rays for two wedge grisms, in which diffractive gratings were etched into the prism faces to correct the chromatic aberrations.
Xin, Nie, Hongfang, Yang, Changxi, Xue
openaire   +2 more sources

Counter-Rotating Quasigeostrophic Ellipsoidal Vortex Pair

Journal of the Physical Society of Japan, 2003
Summary: In geophysical flows, coherent vortex structures persist for long time and their interactions dominate the dynamics of geophysical turbulence. Miyazaki et al. derived a Hamiltonian dynamical system describing the interactions of \(N\) ellipsoidal vortices, where each coherent vortex was modeled by an ellipsoid of uniform potential vorticity ...
Miyazaki, Takeshi, Yamamoto, Masahiro, Fujishima, Shinsuke   +2 more
openaire   +1 more source

A Counter Rotating Power Drill for Needle Biopsy

Clinical Orthopaedics and Related Research, 1984
A new needle biopsy instrument and technique are described. The needle is powered and due to its scissor-like arrangement can provide a core of both soft and hard tissue, preserving histologic detail. The needle has been used in 25 patients, in all of whom an appropriate specimen was obtained.
L S, Matthews, E M, Braunstein
openaire   +2 more sources