Como descreveu Jonckheere (2004), lentes com uma perfeita projecao equiangular
, isto e, com 180[degrees] de campo de visao, resultam em uma imagem circular que mostra uma visao completa do ceu em todas as direcoes, com o zenite no centro e o horizonte nas bordas da imagem.
Other easy-to-fabricate designs involve equiangular
geometries  with tapering and meandering the spiral at its ends .
Currently, in many locations, beam angle selection for IMRT treatment planning is done simply by choosing equiangular
spaced beams or through time-consuming trial and error based on the experience of the treatment planners.
In another direction, we consider the space of n-tuples of equiangular
unit vectors in [R.sup.3].
A biological navigation algorithm known as equiangular
navigation guidance (ENG) law approach accompanied with the use of local obstacle avoidance techniques using sensors was employed in  to plan the motion of a robot to avoid obstacles in complex environment with many obstacles.
Guo et al., "Equiangular
hexagon-shape controlled synthesis of graphene on copper surface," Advanced Materials, vol.
Upon ending the process, this program generates a file with the .IBL extension ready to be imported to a CAD program, said computational code is based on the equiangular
spiral where programming of said codes helps to reduce design time and improve its precision , .
By using random vectors in the corresponding level sets of the Rayleigh quotient [mu](*) and additionally by using equiangular
vectors (with respect to spherical coordinates) from the invariant subspace associated with [[mu].sub.i], [[mu].sub.i+1], [[mu].sub.[xi]], and [[mu].sub.m], we compute numerical upper bounds of ([[[mu].sub.i] - [[mu].sub.([??])]/[mu]([??]) - [[mu].sub.i+1]]) [([[[mu].sub.i] - [mu](y)/[mu](y) - [[mu].sub.i+1]]).sup.-1] and compare them with the new estimated bound [[q([[mu].sub.i])].sup.-2] and the known Chebyshev bound [[[T.sub.2](1 + [2[gamma].sub.i])].sup.-2] based on  and ; see Figure 3.2.
By using gradient iteration process, Xu et al.'s algorithm  first shrinks and updates elements in Gram matrix with Equiangular
Tight Frame (ETF).
projection images were acquired over 360[degrees] with an exposure time of 1 second.
When improved-LARS algorithm calculated the equiangular
vector, we distinguish the effect resulting from different attribute variable, considering joint correlation between regression variables and surplus variable.
FGM2008 is a spherical harmonic model of the Earth's gravitational potential, developed by a least squares combination of the ITG-GRACE03S gravitational model and its associated error covariance matrix, with the gravitational information obtained from a global set of area-mean free-air gravity anomalies defined on a 5 arc-minute equiangular
grid (Pavlis et al., 2012).