Results 1 to 10 of about 11,514,111 (239)
Image based visual servoing with kinematic singularity avoidance for mobile manipulator [PDF]
PeerJ Computer ScienceThis article presents an implementation of visual servoing (VS) for a redundant mobile manipulator in an eye-in-hand configuration. We used the image based visual servoing (IBVS) scheme, which means the pose control of the robot is based on the error ...
Jesus Hernandez-Barragan +4 more
doaj +3 more sources
Spacetime perspective of gravitational lensing in perturbed cosmologies [PDF]
Scientific ReportsWe develop the spacetime approach to gravitational lensing by spherically symmetric perturbations of flat, cosmological constant-dominated Friedman-Robertson-Walker metrics.
Thomas P. Kling, Sophia MacQueen Pooler
doaj +2 more sources
Fluids, 2022 This study examines the hydrodynamic parameters of a unique geometry that could be used effectively for wave energy extraction applications. In particular, we are concerned with the oblate spheroidal geometry that provides the advantage of a wider impact
Eirini I. Anastasiou +1 more
doaj +1 more source
The Method of Image Singularities Employed for Oscillating Oblate Spheroids under a Free Surface
Fluids, 2020 The main objective of this study is to develop a semi-analytical formulation for the radiation problem of a fully immersed spheroid in a liquid field of infinite depth.
Eirini I. Anastasiou +2 more
doaj +1 more source
Ultimate Image Singularities in Oblate Spheroidal Coordinates with Applications in Hydrodynamics
Journal of Marine Science and Engineering, 2020 This study exploits the Touvia Miloh oblate spheroid theorem with a special focus on hydrodynamical applications. The theorem provides explicit relations that express the oblate spheroidal harmonics, given in terms of the fundamental solutions of the ...
Ioannis K. Chatjigeorgiou +3 more
doaj +1 more source
Improving the Manipulability of a Redundant Arm Using Decoupled Hybrid Visual Servoing
Applied Sciences, 2021 This study proposes a hybrid visual servoing technique that is optimised to tackle the shortcomings of classical 2D, 3D and hybrid visual servoing approaches.
Alireza Rastegarpanah +2 more
doaj +1 more source
Image of the thin accretion disk around compact objects in the Einstein–Gauss–Bonnet gravity
European Physical Journal C: Particles and Fields, 2021 We study the optical appearance of a thin accretion disk around compact objects within the Einstein–Gauss–Bonnet gravity. Considering static spherically symmetric black holes and naked singularities we search for characteristic signatures which can arise
Galin Gyulchev +3 more
doaj +1 more source
Fast and simple super-resolution with single images
Scientific Reports, 2022 We present a fast and simple algorithm for super-resolution with single images. It is based on penalized least squares regression and exploits the tensor structure of two-dimensional convolution. A ridge penalty and a difference penalty are combined; the
Paul H. C. Eilers, Cyril Ruckebusch
doaj +1 more source
Observational signatures of strongly naked singularities: image of the thin accretion disk
European Physical Journal C: Particles and Fields, 2020 We study the optical appearance of a thin accretion disk around the strongly naked static Janis–Newman–Winicour singularity. The solution does not possess a photon sphere, which results in the formation of a complex structure of bright rings in the ...
Galin Gyulchev +4 more
doaj +1 more source
Homological Bondal-Orlov localization conjecture for rational singularities
Forum of Mathematics, Sigma, 2023 Given a resolution of rational singularities $\pi \colon {\tilde {X}} \to X$ over a field of characteristic zero, we use a Hodge-theoretic argument to prove that the image of the functor ${\mathbf {R}}\pi _*\colon {\mathbf {D}}^{\mathrm {b}}({\
Mirko Mauri, Evgeny Shinder
doaj +1 more source