Results 101 to 110 of about 5,920 (280)
Geodesic deviation in the q-metric
European Physical Journal C: Particles and FieldsWe consider the tidal forces between test particles falling along geodesics in the exterior spacetime generated by a static and axially symmetric compact matter source with a non-vanishing mass quadrupole.
A. Idrissov +4 more
doaj +1 more source
AxiomsIn this paper, we examine torse-forming vector fields to characterize extrinsic spheres (that is, totally umbilical hypersurfaces with nonzero constant mean curvatures) in Riemannian and Lorentzian manifolds.
Norah Alshehri, Mohammed Guediri
doaj +1 more source
Non-relativistic spinning particle in a Newton-Cartan background
Journal of High Energy Physics, 2018 We construct the action of a non-relativistic spinning particle moving in a general torsionless Newton-Cartan background. The particle does not follow the geodesic equations, instead the motion is governed by the non-relativistic analog of Papapetrou ...
Andrea Barducci +2 more
doaj +1 more source
Active contours with weighted external forces for medical image segmentation [PDF]
Parametric active contours have been widely used for image segmentation. However, high noise levels and weak edges are the most acute issues that hinder their performance, particularly in medical images.
Khadidos, Alaa +2 more
core
CANRIG: Cross‐Attention Neural Face Rigging with Variable Local Control
Computer Graphics Forum, EarlyView.Abstract Facial animation is one of the most labor‐intensive aspects of animation and VFX, as traditional rigging consumes weeks of expert time and forces animators to spend countless hours manipulating hundreds of controls to achieve varied expressions.
Arad Mohammadi +6 more
wiley +1 more source
Connectivity by geodesics on globally hyperbolic spacetimes with a lightlike Killing vector field
Revista Matemática Iberoamericana, 2017 Taking a globally hyperbolic spacetime endowed with a complete lightlike Killing vector field and a complete Cauchy hypersurface, we characterize the points which can be connected by geodesics. A straightforward consequence is the geodesic connectedness of globally hyperbolic generalized plane waves with a complete Cauchy hypersurface.
BARTOLO, Rossella, Candela AM, Flores JL
openaire +3 more sources
Geometry‐Aware Alignment and Comparison of Hierarchical Morse Complexes with Applications
Computer Graphics Forum, EarlyView.Abstract Scalar fields derived from 3D X‐ray CT scans of samples undergoing ex situ processes, such as thermal aging, chemical etching, or mechanical stress, pose unique challenges for characterizing similarities and differences across acquisitions. Typically, a sample A (source) is imaged, removed, and subjected to experimental conditions that alter ...
Aniketh Venkat +3 more
wiley +1 more source
IEEE AccessCompared with 2D face recognition systems, 3D facial recognition has been a popular area of study in academia and industry because of its ability to detect human faces in an unconstrained environment more efficiently.
Gangothri Sanil +3 more
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Lightlike Submanifolds of a Semi-Riemannian Manifold of Quasi-Constant Curvature
Journal of Applied Mathematics, 2012 We study the geometry of lightlike submanifolds (𝑀,𝑔,𝑆(𝑇𝑀),𝑆(𝑇𝑀⟂)) of a semi-Riemannian manifold (𝑀,̃𝑔) of quasiconstant curvature subject to the following conditions: (1) the curvature vector field ζ of 𝑀 is tangent to 𝑀, (2) the screen distribution 𝑆(
D. H. Jin, J. W. Lee
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Individualized Pathfinding in Rugged Open Terrains Using Semantic Navigation Meshes
Computer Graphics Forum, EarlyView.We introduce semantic navigation meshes for complex outdoor terrains, partitioning space into regions with coherent semantic properties like slope or vegetation density. The resulting graphs enable efficient pathfinding with agent‐specific, parameterized cost functions without precomputation, accelerating search while maintaining path quality close to ...
C. Creus, N. Pelechano, O. Argudo
wiley +1 more source