Results 1 to 10 of about 3,852 (253)
Gravitational caustics in an atom laser [PDF]
Nature Communications, 2021 Previously, the study of caustics has mostly focused on experiments with light. Here, the authors demonstrate gravitational caustics and investigate catastrophe atom optics using the matter waves of an atom laser generated from a Bose-Einstein condensate.
M. E. Mossman +3 more
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International Journal of Mathematics and Mathematical Sciences, 1986 The Lagrange manifold (WKB) formalism enables the determination of the asymptotic series solution of linear differential equations modelling wave propagation in spatially inhomogeneous media at caustic (turning) points.
Arthur D. Gorman
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Caustic spot light for rendering caustics [PDF]
The Visual Computer, 2008 It is difficult to render caustic patterns at interactive frame rates. This paper introduces new rendering techniques that relax current constraints, allowing scenes with moving, non-rigid scene objects, rigid caustic objects, and rotating directional light sources to be rendered in real-time with GPU hardware acceleration.
Liu, X., Dong, Z., Bao, H., Peng, Q.
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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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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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Caustic Frequency in 2D Stochastic Flows Modeling Turbulence
Mathematics, 2021 Stochastic flows mimicking 2D turbulence in compressible media are considered. Particles driven by such flows can collide and we study the collision (caustic) frequency. Caustics occur when the Jacobian of a flow vanishes.
Leonid I. Piterbarg
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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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