نتایج جستجو برای: rotation effect
تعداد نتایج: 1703180 فیلتر نتایج به سال:
The recent years' problems of herbicide use have led a growing number of researchers to seek alternative methods that are less reliant on herbicides. This research was conducted to determine the effect of long-term crop rotation, mineral fertilizer and herbicide on the weed infestation and grain yield of winter rye during 2004 and 2005 at the long-term experimental site of the University of Tim...
The numerical solution of the Milne problem for semi-infinite plane-parallel magnetized electron atmosphere is obtained. It is assumed that magnetic field is directed along the normal to the atmosphere. The angular dependence, the polarization degree and positional angle of outgoing radiation are presented in the tables for various values of the Faraday rotation parameter and the degree of abso...
Measurements of the Faraday rotation of the CMBR polarization could provide an evidence for the existence of primordial magnetic fields. The Faraday rotation could also allow to study some properties of the latter. In this paper, we calculate angular dependence of the Faraday rotation correlator for different assumptions about the spectral index and correlation length of the magnetic field. We ...
We use cosmological magneto-hydrodynamic simulations to study the evolution of magnetic fields in galaxy clusters in two different cosmological models, a standard-CDM and a Λ-CDM model. We show that the magnetic field strength profiles closely follow the cluster density profiles outside a core region of radius ∼ 200h kpc. The magnetic field has a correlation length of order 50h kpc and reverses...
We propose a robust scheme, using tripod stimulated Raman adiabatic passage, to generate one-qubit rotation gate. In this scheme, a four-level atom interacts with three resonant laser pulses and time evolution of the corresponding coherent system is designed such that the rotation gate is implemented at the end of process. Rotation angle in this gate is holonomic and has a geometrical basis in ...
The main purpose of this research is to investigate the effect of mandatory rotation of auditors on the relationship between audit fees and market value added, economic value added and growth opportunities for listed companies in Tehran Stock Exchange. Research hypotheses based on a statistical sample of 106 companies during an 11-year period from 2007 to 2017 were tested using the multivariabl...
We predict theoretically and demonstrate experimentally an ellipticity-dependent nonlinear magneto-optic rotation of elliptically polarized light propagating in a medium with atomic coherence. We show that this effect results from hexadecapole and higher-order moments of the atomic coherence, and is associated with an enhancement of Kerr and higher-order nonlinearities accompanied by suppressio...
High resolution studies of circular polarization allow us see where it arises in a jet, study its local fractional level and spectrum, and compare these results to local measures of linear polarization and Faraday rotation. Here we not only review past results from Very Long Baseline Array (VLBA) circular polarization studies, but we also present preliminary new results on two quasars. In the c...
We study the effect of inhomogeneities in the matter distribution of the universe on the Faraday rotation of light from distant QSOs and derive new limits on the cosmological magnetic field. The matter distribution in the Universe is far from being homogeneous and, for the redshifts of interest to rotation measures (RM), it is well described by the observed Ly-α forest. We use a log-normal dist...
The formation of relativistic jets in Active Galactic Nuclei (AGN) is related to accretion onto their central supermassive black holes, and magnetic (B) fields are believed to play a central role in launching, collimating, and accelerating the jet streams from very compact regions out to kiloparsec scales. We present results of Faraday rotation studies based on Very Long Baseline Array (VLBA) d...
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