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Motion in the Normal Direction
2003In this chapter we discuss the motion of an interface under an internally generated velocity field for constant motion in the normal direction. This velocity field is defined by V↦ = a N↦ or V n = a, where a is a constant. The corresponding level set equation (i.e., equation (4.4)) is $$\phi t\, + \,a\left| {\nabla \phi } \right|\, = \,0,\,$$ (6.
Stanley Osher, Ronald Fedkiw
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Direct Observation of the Direction of Motion for Spherical Catalytic Swimmers
Langmuir, 2011Nonconductive Janus particle swimmers made by coating fluorescent polymer beads with hemispheres of platinum have been fully characterized using video microscopy to reveal that they undergo propulsion in hydrogen peroxide fuel away from the catalytic platinum patch. The platinum coating shadows the fluorescence signal from half of each swimmer to allow
Stephen J, Ebbens, Jonathan R, Howse
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Dynamic visual attention: motion direction versus motion magnitude
SPIE Proceedings, 2008Defined as an attentive process in the context of visual sequences, dynamic visual attention refers to the selection of the most informative parts of video sequence. This paper investigates the contribution of motion in dynamic visual attention, and specifically compares computer models designed with the motion component expressed either as the speed ...
Alexandre Bur +3 more
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Monocular discrimination of the direction of motion in depth
Vision Research, 1994The direction of motion in depth of a monocularly-viewed rigid sphere can be quantified in terms of the distance by which the sphere's centre will miss the centre of the pupil of the observing eye. If we express this distance as ns (where s is the sphere's radius and n is a scaling factor), then n approximates the ratio (d phi/dt)/(d theta/dt) between ...
D, Regan, S, Kaushal
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Feasibility of Motion Planning on Directed Graphs
2009Because of irreversibility of movements, motion planning on directed graphs is much more intricate than that on graphs. Recently we showed that the feasibility of motion planning on acyclic and strongly connected directed graphs can be decided in time O (nm ) (n ,m are respectively the number of vertices and arcs of the directed graph), but left the ...
Zhilin Wu, Stéphane Grumbach
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Directed Motion and Pinning of Atomic Lattices at Disordered Interfaces
E-Journal of Surface Science and Nanotechnology, 2022Takaaki Kawaguchi
exaly
Emergence of Directed Motion in a 2D System of Yukawa Particles on 1D Ratchet
Physica A: Statistical Mechanics and Its Applications, 2022Rajaraman Ganesh, Anshika Chugh
exaly