Results 21 to 30 of about 18,556 (174)
The caustics method in the contact problems of anisotropic materials
EPJ Web of Conferences, 2010 Regions with high stress gradients represent critical zones of engineering structures such as crack tip or vicinity of the contact zone. The optical method of caustics is one of the few experimental methods which provide applicable results in these ...
Jecić S., Semenski D., Bakić A.
doaj +1 more source
Caustic design in periodic lattices [PDF]
, 2012 We study curved trajectory dynamics and design in discrete array settings. We find that beams with power law phases produce curved caustics associated with the fold and cusp type catastrophes.
Chremmos, Ioannis +1 more
core +2 more sources
Degree and class of caustics by reflection for a generic source [PDF]
, 2013 We are interested in the study of caustics by reflection of irreducible algebraic planar curves (in the complex projective plane). We prove the birationality of the caustic map (for a generic light position).
Josse, Alfrederic, Pene, Francoise
core +5 more sources
Study on dynamic crack initiation and propagation behavior of surrounding rock of adjacent roadway
矿业科学学报, 2021 In order to study the mechanical behavior characteristics of dynamic crack initiation and propagation of surrounding rock of adjacent roadway under impact load, with the help of a new digital laser dynamic caustics experimental system, a rock-like medium
Yang Liyun +5 more
doaj +1 more source
Quantum Caustics for Systems with Quadratic Lagrangians [PDF]
, 1998 We study caustics in classical and quantum mechanics for systems with quadratic Lagrangians. We derive a closed form of the transition amplitude on caustics and discuss their physical implications in the Gaussian slit (gedanken-)experiment.
Berry +24 more
core +3 more sources
New 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
Emergency 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
Catastrophe theory and caustics of radially symmetric beams [PDF]
Компьютерная оптика, 2019 The work is devoted to the study of the caustics of radial beams. Analytical expressions for caustic surfaces of wave fronts created by radially symmetric diffractive optical elements are found.
Sergey Kharitonov +2 more
doaj +1 more source
Caustics experimental study on the interaction between moving cracks and voids under impact loading
矿业科学学报, 2022 In order to study the fracture characteristics of semi-disc specimens with circular defects under different impact speeds, Hopkinson rod is used to dynamically load the semi-disc specimen, and the fracture process of the semi-disc specimen is observed by
Luo Haohao +4 more
doaj +1 more source
Физика волновых процессов и радиотехнические системы, 2023 Calculation of the electromagnetic field exited by a charged particle flying close to dielectric object is one of the important problems of charged particle radiation theory. In some cases, geometric optics area is preferable for calculations.
Ekaterina S. Belonogaya +1 more
doaj +1 more source