We examine models in which jets are responsible for the formation of the emission-line spiral structure in IRAS 04210+0400. The kiloparsec-scale radio lobes in this active galaxy appear to be related to its extended emission-line spiral structure. The radio structure consists mainly of extended symmetrically bent, FR I-type lobes, which follow the emission-line spiral structure at their inner e...

Complex electrical activities in cardiac tissue can set up time-varying electromagnetic field. Magnetic flux is introduced into the Fitzhugh-Nagumo model to describe the effect of electromagnetic induction, and then memristor is used to realize the feedback of magnetic flux on the membrane potential in cardiac tissue. It is found that a spiral wave can be triggered and developed by setting spec...

In this paper, the implicitly implemented LES method and fifth order bandwidth-optimized WENO scheme are used to make comprehensive studies on the separation topology of the MVG controlled flow at M=2.5 and Re θ θ θ θ =5760. Experiments are also made to verify the prediction of the computation. Analyses are conducted on three categories of the topology: the surface separation, cross-section sep...

We study the polarization induced via spin-orbit interaction by a magnetic cycloidal order in orthorhombic TbMnO3 using first-principle methods. The case of magnetic spiral lying in the bc plane is analyzed, in which the pure electronic contribution to the polarization is shown to be small. We focus our attention on the lattice-mediated contribution, and study it’s dependence on the Coulomb int...

We propose a spin-orbit qubit in a nanowire quantum dot on the surface of a multiferroic insulator with a cycloidal spiral magnetic order. The spiral exchange field from the multiferroic insulator causes an inhomogeneous Zeeman-like interaction on the electron spin in the quantum dot, producing a spin-orbit qubit. The absence of an external magnetic field benefits the integration of such a spin...

Basically the only existing theories for the creation of a magnetic field (B) in the Universe are the creation of a seed field ∼ 10 G in spiral galaxy which is subsequently supposedly amplified up to the observed 10—10 G by a dynamo process or a seed intergalactic field of ∼ 10—10 G which is amplified by collapse and differential rotation. No satisfactory dynamo theory, however, exists today. W...

A large diameter (up to 73.8 cm), high-density helicon plasma with short axial length (≤ 81 cm) has been successfully produced using a flat spiral antenna. The electron plasma density can reach up to ∼ 10 cm−3 with the input radio frequency (rf) power of < 4 kW for various axial lengths, and the density scaling as a function of the axial length is in good agreement with expectations. The strong...

Solutions of the general cubic complex Ginzburg-Landau equation comprising multiple spiral waves are considered. For parameters close to the vortex limit, and for a system of spiral waves with well-separated centres, laws of motion of the centres are found which vary depending on the order of magnitude of the separation of the centres. In particular, the direction of the interaction changes fro...

We examine the observations of large-scale magnetic elds in the Universe. We begin at the largest scale with clusters of galaxies and work our way down through galaxies and nally to the Milky Way, on which we concentrate in detail. We examine the observations of the Galactic magnetic eld, and their interpretation, under the philosophy that the Galactic magnetic eld is like that in other spiral ...

Spiral galaxies host dynamically important magnetic fields which can affect gas flows in the disks and halos. Total magnetic fields in spiral galaxies are strongest (up to 30 μG) in the spiral arms where they are mostly turbulent or tangled. Polarized synchrotron emission shows that the resolved regular fields are generally strongest in the interarm regions (up to 15 μG). Faraday rotation measu...