Results 261 to 270 of about 164,015 (303)

Programmable Axial Spectral Evolution of Space-Time Wavepackets

Frontiers in Optics / Laser Science, 2020
Controllable axial spectral encoding is shown via selective amplitude-modulation of a space-time wave packet. Arbitrarily-varying spectra along the optic axis could act as a ‘spectral stamp,’ with potential applications in axial rangefinding or remote-sensing.
Alyssa M. Allende Motz, Murat Yessenov, Ayman F. Abouraddy   +2 more
openaire   +1 more source

Buckling of an Axially Compressed Incompressible Half Space∗

Journal of Structural Mechanics, 1983
ABSTRACT Symmetric and nonsymmetric buckling solutions are obtained for an axially compressed half space. The half space is assumed to be made of a general in compressible isotropic elastic material. Solutions are made possible via the use of a direct approach that does not employ conventional Fourier-analysis calculations.
Chien H. Wu, Guangzhong Cao
openaire   +1 more source

Linearization procedure for cylindrically and axially symmetric space-times

General Relativity and Gravitation, 1982
An investigation of the vacuum Einstein gravitational field equations for cylindrically and axially symmetric space-times is presented which leads to an equivalent differential system involving a simple nonlinearity only. The case when this equivalent system is linear is analyzed in detail and two methods for generating solutions of the Einstein vacuum
openaire   +1 more source

Free-space measurement of bi-axial anisotropic materials

6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003, 2003
This paper presents an extension of the free-space method for measurement of bi-axial anisotropic material at microwave frequencies. In this method, four complex transverse constitutive parameters are directly computed from the reflection and transmission coefficients of a planar sample in free space for a normally incident plane wave with two ...
null Yin Hongcheng, null Xu Yanping, null Chao Zengming   +2 more
openaire   +1 more source

Axial Parts beyond space

This chapter investigates the nature of Axial Parts (AxPs)/Relational nouns(RelN) and their relationship with Grounds in spatial expressions and beyond. We argue that the relation between AxPs and Grounds is predicative. We challenge the view that prepositions inherently encode
openaire   +1 more source

Reflective correctors for the Hubble Space Telescope axial instruments

Applied Optics, 1993
Reflective correctors to compensate the spherical aberration in the Hubble Space Telescope are placed in front of three of the axial scientific instruments (a camera and two spectrographs) during the first scheduled refurbishment mission. The five correctors required are deployed from a new module that replaces the fourth axial instrument.
openaire   +2 more sources

The space groups of axial crystals and quasicrystals

Reviews of Modern Physics, 1991
We compute all the three-dimensional quasicrystallographic space groups with n-fold axial point groups and standard lattices by a method that treats crystals and quasicrystals on an equal footing. We do not rely on projecting higher-dimensional crystallographic space groups, our results are valid for arbitrary n, and our analysis is elementary.
David A. Rabson, N. David Mermin, Daniel S. Rokhsar, David C. Wright   +3 more
openaire   +1 more source

Axial Lyric Space in Two Late Songs

2016
Abstract The deserved prestige of Der Winterreise and Schwanengesang distracts from the many other extraordinary songs of Schubert’s final years. This essay considers two of these late songs, ‘Im Freien’ (1826) and ‘Der Winterabend’ (1828), as consummate examples of the composer’s late style and considers how and why it differs from the ...
openaire   +1 more source

4-Webs on hypersurfaces of 4-axial space

Journal of Mathematical Sciences, 2011
V. B. Lazareva investigated 3-webs formed by shadow lines on a surface embedded in 3-dimensional projective space and assumed that the lighting sources are situated on 3 straight lines. The results were used, in particular, for the solution of the Blaschke problem of classification of regular 3-webs formed by pencils of circles in a plane.
openaire   +1 more source

Does the axial vector current influence space-time?

Lettere al Nuovo Cimento, 1972
In part icle physics the axial vector current, together with the vector current, has p layed an impor tant role in current algebras (1) and chiral dynamics (2). Does i t p lay any role in other branch of physics? In this let ter we argue tha t the axial vector current, along with the energy-momentum tensor, of the spin89 baryons and leptons may ...
openaire   +1 more source