Results 21 to 30 of about 8,017,385 (274)
European Physical Journal C: Particles and Fields, 2020 We consider the structure of halos of the axionic dark matter, which surround massive relativistic objects with static spherically symmetric gravitational field and monopole-type magneto-electric fields.
Alexander B. Balakin, Dmitry E. Groshev
doaj +1 more source
On Jacobi-Type Vector Fields on Riemannian Manifolds
Mathematics, 2019 In this article, we study Jacobi-type vector fields on Riemannian manifolds. A Killing vector field is a Jacobi-type vector field while the converse is not true, leading to a natural question of finding conditions under which a Jacobi-type vector field ...
Bang-Yen Chen +2 more
doaj +1 more source
Optimal E-Field Vector Combination for a Highly Focused Antenna-Array [PDF]
, 2014 A near-field highly focused circular phased-array antenna for 5.8-GHz radio frequency identification (RFID) applications is presented. The electric field (E-field) at the focus is enhanced by a constructive vector combination in a three-dimensional (3-D)
Perallos, Asier +5 more
core +1 more source
Combining synthetic human odours and low-cost electrocuting grids to attract and kill outdoor-biting mosquitoes : field and semi-field evaluation of an improved mosquito landing box [PDF]
, 2016 On-going malaria transmission is increasingly mediated by outdoor-biting vectors, especially where indoor insecticidal interventions such as long-lasting insecticide treated nets (LLINs) are widespread.
Moore, Sarah J. +26 more
core +1 more source
Black holes in an expanding universe and supersymmetry
Physics Letters B, 2016 This paper analyzes the supersymmetric solutions to five and six-dimensional minimal (un)gauged supergravities for which the bilinear Killing vector constructed from the Killing spinor is null. We focus on the spacetimes which admit an additional SO(1,1)
Dietmar Klemm, Masato Nozawa
doaj +1 more source
Complete Riemannian manifolds admitting a pair of Einstein-Weyl structures [PDF]
Mathematica Bohemica, 2016 We prove that a connected Riemannian manifold admitting a pair of non-trivial Einstein-Weyl structures $(g, \pmømega)$ with constant scalar curvature is either Einstein, or the dual field of $ømega$ is Killing.
Amalendu Ghosh
doaj +1 more source
Weakly charged generalized Kerr–NUT–(A)dS spacetimes
Physics Letters B, 2017 We find an explicit solution of the source free Maxwell equations in a generalized Kerr–NUT–(A)dS spacetime in all dimensions. This solution is obtained as a linear combination of the closed conformal Killing–Yano tensor hab, which is present in such a ...
Valeri P. Frolov +2 more
doaj +1 more source
On the existence of Killing vector fields [PDF]
Classical and Quantum Gravity, 1999 9 pages, no figure, to appear in Class.
openaire +3 more sources
Male-killing bacteria in insects: mechanisms, incidence and implications [PDF]
, 2000 Bacteria that are vertically transmitted through female hosts and kill male hosts that inherit them were first recorded in insects during the 1950s. Recent studies have shown these "male-killers" to be diverse and have led to a reappraisal of the biology
Hurst, GDD +3 more
core +1 more source
Killing Vector Fields in Generalized Conformal β-Change of Finsler Spaces
Journal of Mathematics, 2015 We consider a Finsler space equipped with a Generalized Conformal β-change of metric and study the Killing vector fields that correspond between the original Finsler space and the Finsler space equipped with Generalized Conformal β-change of metric.
Mallikarjun Yallappa Kumbar +3 more
doaj +1 more source