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Physical Review FluidsInertial particles (IPs) in vortical fluid flow cluster strongly, forming singular structures termed caustics for their resemblance to focal surfaces in optics. Here we show that such extreme aggregation onto low-dimensional submanifolds can arise without mechanical inertia for self-propelled particles (SPPs), through a formal correspondence between ...
Rahul Chajwa +3 more
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UNDERWATER PHOTOGRAMMETRY IN VERY SHALLOW WATERS: MAIN CHALLENGES AND CAUSTICS EFFECT REMOVAL [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 In this paper, main challenges of underwater photogrammetry in shallow waters are described and analysed. The very short camera to object distance in such cases, as well as buoyancy issues, wave effects and turbidity of the waters are challenges to be ...
P. Agrafiotis +6 more
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Caustics bounding entanglement wedges
Journal of High Energy Physics, 2020 We study the caustics on the boundaries of entanglement wedges in the context of holography in asymptotically AdS3 spacetimes. These entanglement wedges play an important role in our understanding of the emergence of bulk locality.
Marine De Clerck +2 more
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Shaping caustics into propagation-invariant light [PDF]
, 2022 Structured light has revolutionized optical particle manipulation, nano-scaled material processing, and high-resolution imaging. In particular, propagation-invariant light fields such as Bessel, Airy, or Mathieu beams show high robustness and have a self-
Alonso, M.A. (Miguel) +3 more
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Real-time Rendering of Indirectly Visible Caustics [PDF]
, 2022 Caustics are a challenging light transport phenomenon to render in real-time, and most previous approaches have used screen-space accumulation based on the fast rasterization hardware of GPUs. This limits the position of photon collection points to first
Michael Doggett +3 more
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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
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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
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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
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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
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The Identification of Dark Matter, 2000 Abstract: The late infall of cold dark matter onto an isolated galaxy such as our own produces flows with definite velocity vectors at any physical point in the galactic halo. It also produces caustics which are places where the dark matter density is very large. The outer caustics are topological spheres whereas the inner caustics are rings. The self‐
Sikivie, P., Kinney, W.
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