Results 31 to 40 of about 198,011 (278)

Convection displacement current and alternative form of Maxwell-Lorentz equations [PDF]

, 1996
Some mathematical inconsistencies in the conventional form of Maxwell's equations extended by Lorentz for a single charge system are discussed. To surmount these in framework of Maxwellian theory, a novel convection displacement current is considered as ...
Chubykalo, Andrew E., Smirnov-Rueda, Roman   +1 more
core   +2 more sources

Duality and helicity: A symplectic viewpoint

Physics Letters B, 2016
The theorem which says that helicity is the conserved quantity associated with the duality symmetry of the vacuum Maxwell equations is proved by viewing electromagnetism as an infinite dimensional symplectic system.
M. Elbistan, C. Duval, P.A. Horváthy, P.-M. Zhang   +3 more
doaj   +1 more source

Anti-self-dual Maxwell solutions on hyperk\"ahler manifold and N=2 supersymmetric Ashtekar gravity

, 1998
Anti-self-dual (ASD) Maxwell solutions on 4-dimensional hyperk\"ahler manifolds are constructed. The N=2 supersymmetric half-flat equations are derived in the context of the Ashtekar formulation of N=2 supergravity.
Ashtekar A, Boyer C, Capovilla R, Donaldson S K, Eguchi T, Ezawa K, Gates S J Jr, Joyce D D, Kunitomo H, Mason L J, Mason L J, Ooguri H, Ooguri H, Penrose R, Robinson D C, Sayuri Miyagi, Shoji Zeze, Takasaki K, Takayoshi Ootsuka, Ward R S, Yukinori Yasui   +20 more
core   +1 more source

Nonlinear perturbations of Reissner-Nordstr\"om black holes

, 2019
We develop a nonlinear perturbation theory of Reissner-Nordstr\"om black holes. We show that, at each perturbation level, Einstein-Maxwell equations can be reduced to four inhomogeneous wave equations, two for polar and two for axial sector ...
Rutkowski, Mieszko
core   +1 more source

Approximate Closed-Form Solutions for the Maxwell-Bloch Equations via the Optimal Homotopy Asymptotic Method

Mathematics, 2022
This paper emphasizes some geometrical properties of the Maxwell–Bloch equations. Based on these properties, the closed-form solutions of their equations are established.
Remus-Daniel Ene, Nicolina Pop, Marioara Lapadat, Luisa Dungan   +3 more
doaj   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source

Lifting of the Vlasov-Maxwell Bracket by Lie-transform Method

, 2016
The Vlasov-Maxwell equations possess a Hamiltonian structure expressed in terms of a Hamiltonian functional and a functional bracket. In the present paper, the transformation ("lift") of the Vlasov-Maxwell bracket induced by the dynamical reduction of ...
Brizard, A. J., Burby, J. W., de Guillebon, L., Morrison, P. J., Vittot, M.   +4 more
core   +3 more sources

Real‐World Performance of CSF Kappa Free Light Chains in the 2024 McDonald Criteria

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Kappa free light chains (KFLCs) in the cerebrospinal fluid (CSF) have a similar performance to CSF‐restricted oligoclonal bands (OCB) for multiple sclerosis (MS) diagnosis. To help with implementation, we set out to resolve several remaining uncertainties: (1) performance in a real‐world cohort and the 2024 McDonald criteria; (2 ...
Maya M. Leibowitz, Ryan Cooper, Stefania Kaninia, Kathryn I. Challis, Will Greenway, Maria Bonello, Mahmoud Elbahnasawi, Deborah T. Shode, Dominika Gajdasik, Victor Iliev, Alison M. E. Whitelegg, Ian Galea   +11 more
wiley   +1 more source

Charge conservation in a gravitational field in the scalar ether theory

Open Physics, 2017
A modification of the Maxwell equations due to the presence of a gravitational field was formerly proposed for a scalar theory with a preferred reference frame. With this modification, the electric charge is not conserved. The aim of the present work was
Arminjon Mayeul
doaj   +1 more source

Separation of Maxwell equations in Kerr–NUT–(A)dS spacetimes

Nuclear Physics B, 2018
In this paper we explicitly demonstrate separability of the Maxwell equations in a wide class of higher-dimensional metrics which include the Kerr–NUT–(A)dS solution as a special case.
Pavel Krtouš, Valeri P. Frolov, David Kubizňák   +2 more
doaj   +1 more source