Results 21 to 30 of about 153,260 (240)

Exploring the Magnetic Field Configuration in BL Lac Using GMVA

open access: yesGalaxies, 2016
The high radio frequency polarization imaging of non-thermal emission from active galactic nuclei (AGN) is a direct way to probe the magnetic field strength and structure in the immediate vicinity of supermassive black holes (SMBHs) and is crucial in ...
Bindu Rani   +7 more
doaj   +1 more source

The Lamentations of the Disadvantaged: Reading Psalm 73 in the Context of Oppression in Contemporary Nigerian Society

open access: yesOld Testament Essays, 2023
The evil of humanity’s inhumanity to fellow humans via the act of oppression is pervasive across human societies. This evil will continue unabated because of the inherent evil inclination of the benefiting perpetrators.
Joel Kamsen Tihitshak Biwul
doaj  

Optical Polarimetry and Radio Observations of PKS1510-089 between 2009 and 2013

open access: yesGalaxies, 2018
The blazar PKS 1510-089 has shown intense activity at γ -rays in the recent years. In this work, we discussed the results of our 7 mm radio continuum and optical polarimetric monitoring between 2009 and 2013. In 2009, we detected a large rotation of
Pedro P. B. Beaklini   +2 more
doaj   +1 more source

The structure of zonal jets in geostrophic turbulence [PDF]

open access: yes, 2012
The structure of zonal jets arising in forced-dissipative, two-dimensional turbulent flow on the β-plane is investigated using high-resolution, long-time numerical integrations, with particular emphasis on the late-time distribution of potential ...
Scott, Richard Kirkness   +1 more
core   +1 more source

Flow Pressure Behavior Downstream of Ski Jumps

open access: yesFluids, 2020
Ski jump spillways are frequently implemented to dissipate energy from high-speed flows. The general feature of this structure is to transform the spillway flow into a free jet up to a location where the impact of the jet creates a plunge pool ...
Agostino Lauria   +2 more
doaj   +1 more source

Instability Wave Models of Turbulent Jets from Round and Serrated Nozzles [PDF]

open access: yes, 2010
In this thesis we study pressure fluctuations associated with large-scale coherent structures in turbulent round and serrated jets. Linear disturbances to the turbulent mean flow of the round jet are modeled via linear stability analysis and the ...
Guðmundsson, Kristján
core   +1 more source

Mixing and Isosurface Geometry in Turbulent Transverse Jets [PDF]

open access: yes, 2001
Mixing and the geometry of jet-fluid-concentration level sets in turbulent transverse jets were experimentally studied. Jet-fluid concentration fields were measured with laser-induced fluorescence and digital imaging techniques for Reynolds numbers ...
Shan, Wei-Jen Jerry
core   +1 more source

Gas–liquid flow field analysis of the compressor vorticity and rotational speed based on NASA Stage 36

open access: yesThe Journal of Engineering, 2018
The aero-engine to be cleaned online can significantly improve compressor performance and increase maintenance intervals, but the cleaning online cannot achieve the anticipated effects due to the lack of cognisance of the internal multiphase flow field ...
Liwen Wang   +4 more
doaj   +1 more source

What Drives the Ionized Gas Outflows in Radio-Quiet AGN?

open access: yesGalaxies, 2023
We review the mechanisms driving the ionized gas outflows in radio-quiet (RQ) AGN. Although it constitutes ∼90% of the AGN population, what drives these outflows in these AGNs remains an open question. High-resolution imaging and integral field unit (IFU)
Mainak Singha   +2 more
doaj   +1 more source

Balance, gravity waves and jets in turbulent shallow water flows [PDF]

open access: yes, 2009
This thesis contains a thorough investigation of the properties of freely decaying turbulence in a rotating shallow water layer on a sphere. A large number of simulations, covering an extensive range of Froude and Rossby numbers, have been carried out ...
Shipton, Jemma
core   +2 more sources

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