Results 51 to 60 of about 1,869 (182)

GENERALIZATION OF THE THOMSON FORMULA FOR HARMONIC FUNCTIONS OF A GENERAL TYPE

St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019
It is shown that the Thomson formula for three-dimensional harmonic functions is unique. Namely, there are no other formulas of this type, with the exception of the trivial change of variables in the form of shifts, reflections, rotations and stretching ...
Berdnikov Alexander, Gall Lidia, Gall Nikolaj, Solovyev Konstantin   +3 more
doaj   +1 more source

Magnetostatic Active Contour Model with Classification Method of Sparse Representation

Journal of Electrical and Computer Engineering, 2020
The active contour model is widely used to segment images. For the classical magnetostatic active contour (MAC) model, the magnetic field is computed based on the detected points by using an edge detector.
Guoqi Liu, Yifei Dong, Ming Deng, Yihang Liu   +3 more
doaj   +1 more source

3D finite element modeling of a permanent magnet linear actuator [PDF]

Serbian Journal of Electrical Engineering, 2008
The magnetostatic field and electromagnetic force of a linear actuator with a fixed permanent magnet and soft magnetic mover was studied using the 3D finite element method.
Yatchev Ivan, Ilieva Nikolina, Hinov Krastyo   +2 more
doaj   +1 more source

Hohenberg-Kohn theorems in electrostatic and uniform magnetostatic fields

The Journal of Chemical Physics, 2015
The Hohenberg-Kohn (HK) theorems of bijectivity between the external scalar potential and the gauge invariant nondegenerate ground state density, and the consequent Euler variational principle for the density, are proved for arbitrary electrostatic field and the constraint of fixed electron number. The HK theorems are generalized for spinless electrons
Xiao-Yin Pan, Viraht Sahni
openaire   +4 more sources

Distance‐Dependent Stray Field Decay in Magnetically Stable Remanence Carriers: Implications for Magnetic Microscopy

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract Micropaleomagnetic analysis offers a path to high‐precision reconstructions of ancient magnetic fields from terrestrial and space‐returned samples by inverting the vertical stray field of individual particles to recover their magnetic moments through the use of magnetic microscopes.
U. D. Bellon, G. F. Souza‐Junior, W. Williams, L. Uieda, A. R. Muxworthy, L. Nagy, G. A. Paterson, C. S. Moraes, R. Fu, R. I. F. Trindade   +9 more
wiley   +1 more source

Simplified method for analytically determining the external magnetostatic field of uncertain extended technical objects based on near-field measurements

Electrical engineering & Electromechanics
Introduction. An important scientific and technical problem of magnetism of uncertain extended energy-saturated objects - such as naval vessels and submarines is implementation of strict requirements for magnetic silence based on mathematical modeling of
B. I. Kuznetsov, T. B. Nikitina, I. V. Bovdui, K. V. Chunikhin, V. V. Kolomiets, I. V. Nefodova   +5 more
doaj   +1 more source

Spin wave interference in YIG cross junction

AIP Advances, 2017
This work is aimed at studying the interference between backward volume magnetostatic spin waves and magnetostatic surface spin waves in a magnetic cross junction.
M. Balinskiy, D. Gutierrez, H. Chiang, Y. Filimonov, A. Kozhevnikov, A. Khitun   +5 more
doaj   +1 more source

Numerical Approximation of a PDE‐Constrained Optimization Problem that Appears in Data‐Driven Computational Mechanics

International Journal for Numerical Methods in Engineering, Volume 127, Issue 4, 28 February 2026.
ABSTRACT We investigate an optimization problem that arises when working within the paradigm of Data‐Driven Computational Mechanics. In the context of the diffusion‐reaction problem, such an optimization problem seeks the continuous primal fields (gradient and flux) that are closest to some predefined discrete fields taken from a material data set. The
Pedro B. Bazon, Cristian G. Gebhardt, Gustavo C. Buscaglia, Roberto F. Ausas   +3 more
wiley   +1 more source

Recent Advancements in Bulk Processing of Rare‐Earth‐Free Hard Magnetic Materials and Related Multiscale Simulations

Advanced Engineering Materials, Volume 28, Issue 3, 4 February 2026.
This article provides an overview of recent advancements in bulk processing of rare‐earth‐free hard magnetic materials. It also addresses related simulation approaches at different scales. The research on rare‐earth‐free magnetic materials has increased significantly in recent years, driven by supply chain issues, environmental and social concerns, and
Daniel Scheiber, Andrea Bachmaier
wiley   +1 more source

Observation of Topological Chirality Switching Induced Freezing of a Skyrmion Crystal

Advanced Materials, Volume 38, Issue 9, 12 February 2026.
Using Lorentz Transmission electron microscopy, it is shown that in the insulating van der Waals ferromagnet, CrBr3, a magnetic field can cause Bloch skyrmionic bubbles to spontaneously switch their chirality. As achiral type‐II bubbles are an intermediate state, the bubbles rapidly elongate and shrink when switching, thereby inducing a freezing of the
John Fullerton, Yue Li, Harshvardhan Solanki, Sergey Grebenchuk, Magdalena Grzeszczyk, Zhaolong Chen, Makars Šiškins, Kostya S. Novoselov, Maciej Koperski, Elton J. G. Santos, Charudatta Phatak   +10 more
wiley   +1 more source