scholarly journals Magnetic String with a NonlinearU(1)Source

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
S. H. Hendi
Keyword(s):  
Asymptotic Behavior ◽  
Magnetic Fields ◽  
Electromagnetic Fields ◽  
Einstein Gravity ◽  
Rotation Parameter ◽  
Conserved Quantities ◽  
Curvature Singularity ◽  
Conic Singularity ◽  
Higher Dimensional ◽  
Rotation Parameters

Considering the Einstein gravity in the presence of Born-Infeld type electromagnetic fields, we introduce a class of 4-dimensional static horizonless solutions which produce longitudinal magnetic fields. Although these solutions do not have any curvature singularity and horizon, there exists a conic singularity. We investigate the effects of nonlinear electromagnetic fields on the properties of the solutions and find that the asymptotic behavior of the solutions is adS. Next, we generalize the static metric to the case of rotating solutions and find that the value of the electric charge depends on the rotation parameter. Furthermore, conserved quantities will be calculated through the use of the counterterm method. Finally, we extend four-dimensional magnetic solutions to higher dimensional solutions. We present higher dimensional rotating magnetic branes with maximum rotation parameters and obtain their conserved quantities.

The effects of conformally invariant Maxwell source on the magnetic wormhole solutions in Gauss–Bonnet gravity

2011 ◽  
Vol 89 (3) ◽  
pp. 281-287 ◽  
Author(s):  
S. H. Hendi
Keyword(s):  
Electric Charge ◽  
Rotation Parameter ◽  
Energy Conditions ◽  
Conserved Quantities ◽  
Bonnet Gravity ◽  
Four Dimensions ◽  
Conformally Invariant ◽  
New Class ◽  
Traversable Wormholes ◽  
Higher Dimensional

In this paper we introduce a new class of nonsingular higher dimensional conformally invariant magnetic solutions that may be interpreted as traversable wormholes, which could be supported by matter not violating the weak energy conditions. The electromagnetic source is chosen in which the expression of the Maxwell field does not depend on the dimension and its value coincides with the Reissner–Nordström solution in four dimensions. We generalize this class of solutions to the case of rotating solutions and show that the rotating wormhole solutions have a net electric charge that is proportional to the magnitude of the rotation parameter, while the static wormhole has no net electric charge. Finally, we use the counterterm method and compute the conserved quantities of these spacetimes.

FOUR- AND HIGHER-DIMENSIONAL MODELS WITH DILATON–ELECTROMAGNETIC FIELDS

2001 ◽  
Vol 10 (04) ◽  
pp. 523-528 ◽  
Author(s):  
NARAYAN CHANDRA CHAKRABORTY ◽  
SUBENOY CHAKRABORTY
Keyword(s):  
Asymptotic Behavior ◽  
Electromagnetic Fields ◽  
Dilaton Field ◽  
Field Equations ◽  
General Solutions ◽  
Higher Dimensional ◽  
Bianchi Iii ◽  
Dimensional Models ◽  
Frw Models

The Einstein–Maxwell dilaton field equations are constructed for four-dimensional Bianchi III and five-dimensional FRW models. The general solutions have been obtained and their asymptotic behavior have been studied.

scholarly journals The perturbation of electromagnetic fields at distances that are large compared with the object's size

2014 ◽  
Vol 80 (3) ◽  
pp. 865-892 ◽  
Author(s):  
Paul D Ledger ◽  
William R B Lionheart
Keyword(s):  
Magnetic Fields ◽  
Electromagnetic Fields ◽  
Asymptotic Expansions ◽  
Low Frequency ◽  
Perfect Conductor ◽  
Small Object ◽  
Leading Order ◽  
Material Parameters ◽  
Electric And Magnetic Fields

Abstract We rigorously derive the leading-order terms in asymptotic expansions for the scattered electric and magnetic fields in the presence of a small object at distances that are large compared with its size. Our expansions hold for fixed wavenumber when the scatterer is a (lossy) homogeneous dielectric object with constant material parameters or a perfect conductor. We also derive the corresponding leading-order terms in expansions for the fields for a low-frequency problem when the scatterer is a non-lossy homogeneous dielectric object with constant material parameters or a perfect conductor. In each case, we express our results in terms of polarization tensors.

scholarly journals Cytological effects of pulsed electromagnetic fields and static magnetic fields induced by a therapeutic device on in vivo exposed rats

2015 ◽  
Vol 12 (6) ◽  
pp. 162
Author(s):  
Abraham O. Rodríguez-De la Fuente ◽  
J. Antonio Heredia-Rojas ◽  
Pilar Carranza-Rosales ◽  
Omar Heredia-Rodríguez ◽  
Gerardo Lozano-Garza ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Electromagnetic Fields ◽  
Pulsed Electromagnetic Fields ◽  
Static Magnetic Fields ◽  
Therapeutic Device ◽  
Pulsed Electromagnetic

scholarly journals ANALISIS HUBUNGAN SALURAN TEGANGAN TINGGI LISTRIK TERHADAP JARINGAN SELULAR DI DAERAH GRAHA INDAH TAMBAKBOYO LAMONGAN

JOUTICA ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 255
Author(s):  
Kemal Farouq Mauladi ◽  
Nurul Fuad
Keyword(s):  
Public Health ◽  
Magnetic Fields ◽  
Electric Field ◽  
Cellular Networks ◽  
Electromagnetic Fields ◽  
Electricity Generation ◽  
Negative Impact ◽  
Electrical Energy ◽  
Electric And Magnetic Fields ◽  
The Impact

Telecommunications technology is developing very rapidly, ranging from users or engineers. The development of smartphone smartphones is also increasingly in demand, so that the use of electricity needs is also increasing. The need for electricity usage has resulted in more standing voltage in some settlements. The establishment of sutet will have a negative impact on public health. In addition, the influence of electrical energy on humans occurs because the electrical energy generated by electricity generation or electricity that is channeled gives rise to electromagnetic fields. The higher the voltage required by an equipment, the greater the electric field that is distributed. Besides that, it can also find ways to reduce the negative impact of the electric and magnetic fields produced by SUTET which impacts the process of the occurrence of electric and magnetic fields on SUTET. From the problems above, the author intends to determine the effect or correlation between the impact of SUTET on cellphone network transmissions or channels. This research can later determine the negative impact caused by SUTET for the surrounding community, and the impact of SUTET radiation on cellular networks.

Ion acceleration by multiple laser pulses and their spontaneous electromagnetic fields in plasma

2008 ◽  
Vol 74 (1) ◽  
pp. 111-118
Author(s):  
FEN-CE CHEN
Keyword(s):  
Magnetic Fields ◽  
Electric Field ◽  
Analytical Model ◽  
Electromagnetic Fields ◽  
Equations Of Motion ◽  
Charged Particles ◽  
Laser Pulses ◽  
The Self ◽  
Electric And Magnetic Fields ◽  
Relativistic Equations

AbstractThe acceleration of ions by multiple laser pulses and their spontaneously generated electric and magnetic fields is investigated by using an analytical model for the latter. The relativistic equations of motion of test charged particles are solved numerically. It is found that the self-generated axial electric field plays an important role in the acceleration, and the energy of heavy test ions can reach several gigaelectronvolts.

scholarly journals The Asymptotics of the Higher Dimensional Reidemeister Torsion for Exceptional Surgeries Along Twist Knots

2018 ◽  
Vol 61 (1) ◽  
pp. 211-224 ◽  
Author(s):  
Anh T. Tran ◽  
Yoshikazu Yamaguchi
Keyword(s):  
Asymptotic Behavior ◽  
Reidemeister Torsion ◽  
Graph Manifold ◽  
Higher Dimensional ◽  
Graph Manifolds

AbstractWe determine the asymptotic behavior of the higher dimensional Reidemeister torsion for the graph manifolds obtained by exceptional surgeries along twist knots. We show that all irreducible SL2()-representations of the graph manifold are induced by irreducible metabelian representations of the twist knot group. We also give the set of the limits of the leading coeõcients in the higher dimensional Reidemeister torsion explicitly.

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