Results 41 to 50 of about 238,679 (287)
New electromagnetic memories and soft photon theorems
, 2017 In this paper, we present a new type of electromagnetic memory. It is a `magnetic' type, or B mode, radiation memory effect. Rather than a residual velocity, we find a position displacement of a charged particle induced by the B mode radiation with ...
Mao, Pujian +3 more
core +2 more sources
Cylindrical universes with heat and null radiation flow
The Astrophysical Journal, 1992 We have discussed cylindrically symmetric models with the Kasnerian time evolution incorporating heat flow and null radiation flow with the perfect fluid. In the case of heat flow the Kasner spacetime is the matter-free limit of the model. We establish a general result that a static perfect fluid distribution will on Kasnerization (introduce t 4/3 , t ...
L. K. Patel, Naresh Dadhich
openaire +1 more source
IEEE Open Journal of Antennas and PropagationA class of dielectric filtering inverted-L antenna with reflective- and quasi-reflectionless-type radiation nulls is proposed to achieve wideband or dual-band operation.
Wen Zheng +6 more
doaj +1 more source
Seamless Integration Technology for Filtenna Toward 5G/6G Wireless Communications
IEEE Open Journal of Antennas and PropagationThe fifth generation (5G) mobile communication systems employ technologies such as massive MIMO, millimeter-wave (mmWave), and ultra-dense networks to support higher transmission data rate and lower latency, thereby enabling commercial deployment ...
Wei Hong, Zi-Jun Guo, Zhang-Cheng Hao
doaj +1 more source
Petrov type D pure radiation fields of Kundt's class
, 2009 We present all Petrov type D pure radiation space-times, with or without cosmological constant, with a shear-free, non-diverging geodesic principal null ...
Bergh, N. Van den +2 more
core +1 more source
Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna
IEEE Access, 2019 A two-arm metaspiral antenna is presented, where the feeding voltage sources are expressed using excitation amplitude r and deviation angle δ. This excitation is decomposed into the odd mode and even mode components. The odd mode component forms a
Hisamatsu Nakano +4 more
doaj +1 more source
Unambiguous determination of gravitational waveforms from binary black hole mergers
, 2009 Gravitational radiation is properly defined only at future null infinity ($\scri$), but in practice it is estimated from data calculated at a finite radius.
B. Szilágyi +6 more
core +1 more source
Null Steering of Circular Array Using Array Factor for GPS Anti-Jam [PDF]
Journal of the Korean Institute of Electromagnetic Engineering and Science, 2018 In this letter, the null steering of a circular array is presented using a modified array factor (AF) for a global positioning system (GPS) anti-jam.
Taek-Sun Kwon +2 more
doaj +1 more source
Radiation from accelerated black holes in an anti-de Sitter universe
, 2003 We study gravitational and electromagnetic radiation generated by uniformly accelerated charged black holes in anti-de Sitter spacetime. This is described by the C-metric exact solution of the Einstein-Maxwell equations with a negative cosmological ...
A. Ashtekar +49 more
core +1 more source
Where is the charm quark energy loss at RHIC? [PDF]
, 2003 Heavy quark energy loss in a hot QCD plasma is computed taking into account the competing effects due to suppression of zeroth order gluon radiation below the plasma frequency and the enhancement of gluon radiation due to first order medium induced ...
Adcox +55 more
core +3 more sources