Results 31 to 40 of about 6,426 (298)

Propagation-invariant space-time caustics of light [PDF]

open access: yes, 2021
Caustics are responsible for a wide range of natural phenomena, from rainbows and mirages to sparkling seas. Here, we present caustics in space-time wavepackets, a class of pulsed beams featuring strong coupling between spatial and temporal frequencies ...
Wong, Liang Jie
core   +1 more source

Dynamic crack propagation characteristics of media with bedding under an impact load

open access: yes工程科学学报, 2023
With the gradual development of mines, tunnels, and other underground constructions, theoretical research on the influence of internal defects in rock structure on rock dynamic fracture behavior and related engineering practices are of great importance ...
Yan-bing WANG   +4 more
doaj   +1 more source

EUPHORBIUM AS A CAUSTIC. [PDF]

open access: yesThe Lancet, 1896
n ...
openaire   +1 more source

Anomalous caustics and Veselago focusing in 8-Pmmn borophene p–n junctions with arbitrary junction directions

open access: yesNew Journal of Physics, 2019
Negative refraction usually demands complex structure engineering while it is very natural for massless Dirac fermions (MDFs) across the p–n junction (PNJ), this leads to Dirac electron optics.
Shu-Hui Zhang, Wen Yang
doaj   +1 more source

Caustic ingestion in children: A 6-year retrospective study

open access: yesEmergency Care Journal, 2020
Some aspects of the management of caustic ingestion in children are still debated. We aimed to determine the predictive value of epidemiological and clinical features of caustic ingestion, and to define guidelines adherence. This is a retrospective study
Cristina Lovera   +4 more
doaj   +1 more source

Caustics of developable surfaces [PDF]

open access: yesFrontiers of Information Technology & Electronic Engineering, 2022
Abstract While considering a mirror and light rays coming either from a point source or from infinity, the reflected light rays may have an envelope, called a caustic curve. In this paper, we study developable surfaces as mirrors. These caustic surfaces, described in a closed form, are also developable surfaces of the same type as the
Miklós Hoffmann   +2 more
openaire   +1 more source

Caustics Formation by a Spherical Reflector – Geometric and Wave Field Analysis with Applications in Room Acoustics and Radio Astronomy

open access: yesEngineering Transactions
Based on the principles of geometrical optics, an analytical description of caustics generated in a spherical mirror is presented. The formation of caustics in a wave field is studied using acoustic and electromagnetic waves as an example.
Andrzej Kulowski
doaj   +1 more source

Electron caustic lithography

open access: yesAIP Advances, 2012
A maskless method of electron beam lithography is described which uses the reflection of an electron beam from an electrostatic mirror to produce caustics in the demagnified image projected onto a resist–coated wafer. By varying the electron optics, e.g.
S. M. Kennedy   +5 more
doaj   +1 more source

Spectral Caustics in Attosecond Science

open access: yesEPJ Web of Conferences, 2013
A unique type of singularity common in wave phenomena, known as caustics, links processes observed in many different branches of physics [1]. We investigate the role of caustics in attosecond science and in particular the physical process behind high ...
Dudovich N.   +3 more
doaj   +1 more source

Ciela-Institute/caustics: v0.9.0 [PDF]

open access: yes
<h2>What's Changed</h2> <ul> <li>chore: update pre-commit hooks by @pre-commit-ci in https://github.com/Ciela-Institute/caustics/pull/146</li> <li>style: Activated Mypy Checks and Code Update for Compliance (#58) by ...
Alexandre Adam   +7 more
core   +1 more source

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