Results 251 to 260 of about 2,987,883 (293)
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Nodal points and the eye

Applied Optics, 2022
Nodal points are defined using parallel object and image rays at very small angles to the optical axis, and Johann Listing described them when characterizing the eye in 1845. They are only distinct from principal points when there is a refractive index difference, but Reginald Clay used the term “nodal slide” in 1904 for equipment that uses lens ...
Michael J Simpson
exaly   +4 more sources

The Importance of the Nodal Points in Lens Testing*

Journal of the Optical Society of America, 1920
G W Moffitt
exaly   +2 more sources

Topological nodal lines and nodal points in the antiferromagnetic material β-Fe2PO5

Journal of Materials Chemistry C, 2019
Antiferromagnetic β-Fe2PO5 is a new topological semimetal with coexisting rich fermionic states, and with the potential to be applied in topological antiferromagnetic spintronics.
Tingli He   +5 more
semanticscholar   +1 more source

Floquet multi-Weyl points in crossing-nodal-line semimetals [PDF]

open access: yesPhysical Review B, 2017
Weyl points with monopole charge $\ifmmode\pm\else\textpm\fi{}1$ have been extensively studied; however, real materials of multi-Weyl points, whose monopole charges are higher than 1, have yet to be found.
Zhongbo Yan, Zhong Wang
exaly   +2 more sources

Critical topological nodal points and nodal lines/rings in Kagome graphene

Physical Chemistry Chemical Physics, 2020
Critical topological phases, possessing flat bands, provide a platform to study unique topological properties and transport phenomena under a many-body effect.
Jun Zhou   +3 more
openaire   +2 more sources

IDENTIFICATION OF NODAL POINTS OF ELASTIC INCLUSION IN ELASTIC PLANE

Доклады Российской академии наук. Математика, информатика, процессы управления, 2023
A geometric inverse problem of identifying an isotropic, linearly elastic inclusion in an isotropic, linearly elastic plane is considered. It is assumed that constant stresses are given at infinity, and the displacements and acting loads are known on some closed curve enclosing the inclusion.
Shifrin, E. I., Kaptsov, A. V.
openaire   +1 more source

Tunable Weyl Points in Periodically Driven Nodal Line Semimetals [PDF]

open access: yesPhysical Review Letters, 2016
Weyl semimetals and nodal line semimetals are characterized by linear band touching at zero-dimensional points and one-dimensional lines, respectively. We predict that a circularly polarized light drives nodal line semimetals into Weyl semimetals.
Zhongbo Yan, Zhong Wang
exaly   +2 more sources

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