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- 13Acceleration
- 6Kelvin-Helmholtz Instability
- 5Alfven Waves
- 5Magnetosphere
- 4Ionosphere
- 19Rankin, Robert
- 5Kabin, Konstantin
- 5Lu, J. Y.
- 5Marchand, Richard
- 5Tikhonchuk, V. T.
- 4Tikhonchuk, Vladimir T.
- 22Physics, Department of
- 22Physics, Department of/Journal Articles (Physics)
- 4Graduate and Postdoctoral Studies (GPS), Faculty of
- 4Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 1Earth and Atmospheric Sciences, Department of
- 1Earth and Atmospheric Sciences, Department of/Journal Articles (Earth and Atmospheric Sciences)
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Recent increases in Arctic freshwater flux affects Labrador Sea convection and Atlantic overturning circulation
Download2016
Chambers, Don, Dixon, Timothy H., Bonin, Jennifer, van den Broeke, M. R., Yang, Qian, Ribergaard, Mads H., Mortensen, John, Myers, Paul G.
The Atlantic Meridional Overturning Circulation (AMOC) is an important component of ocean thermohaline circulation. Melting of Greenland’s ice sheet is freshening the North Atlantic; however, whether the augmented freshwater flux is disrupting the AMOC is unclear. Dense Labrador Sea Water (LSW),...
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Charged particle behavior in the growth and damping stages of ultralow frequency waves: Theory and Van Allen Probes observations
Download2016
Wygant, John R., Zong, Qui-Gang, Kletzing, Craig A., Blake, J. Bernard, Kivelson, Margaret G., Zhou, Xuzhi, Chen, Xing-Ran, Rankin, Robert, Wang, Zi-Han
Ultralow frequency (ULF) electromagnetic waves in Earth's magnetosphere can accelerate charged particles via a process called drift resonance. In the conventional drift resonance theory, a default assumption is that the wave growth rate is time independent, positive, and extremely small. However,...
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2016
Turkakin, Hava, Rankin, Robert, Mann, Ian R.
The emission of propagating MHD waves from the boundaries of flow channels that are unstable to the Kelvin-Helmholtz Instability (KHI) in magnetized plasma is investigated. The KHI and MHD wave emission are found to be two competing processes. It is shown that the fastest growing modes of the KHI...
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Stability of Magnetohydrodynamic Shear Flow Boundaries: Kelvin-Helmholtz Instabilities and Emission of Magnetosonic Waves
DownloadSpring 2015
boundaries for the Kelvin-Helmholtz Instability (KHI) is investigated. We have focused our attention on the emission of magnetosonic waves from the Kelvin-Helmholtz (K-H) unstable shear flow boundaries of MHD plasmas. We have shown for the first time that the Kelvin-Helmholtz Instability is a...
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Field Line Resonances in Earth’s Magnetosphere: A study of their Observation, Characterization and Wave Sources in the Solar Wind
DownloadFall 2015
This thesis is an observational study of field line resonances (FLRs), between 0.5-5 mHz, in the Earth’s magnetosphere, and their correlation with Ultra Low Frequency (ULF) waves in the solar wind. The mechanisms for these phenomena are not yet completely understood and there is still great...
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Crack Growth Behavior of Pipeline Steels under Variable Pressure Fluctuations in a Near-Neutral pH Environment
DownloadFall 2015
This research aims at understanding the crack propagation behavior of pipeline steels under variable pressure fluctuations in a near-neutral pH environment. Although pressure fluctuations have been recognized as the driving force for crack growth for more than two decades, the mechanisms...
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2012
Fenrich, Frances R., Nedie, Abiyu Z., Rankin, Robert
Ultra-low frequency (ULF) field line resonances (FLRs) cause oscillations in F-region plasma flows and can be detected in SuperDARN measured line-of-sight (l-o-s) velocities. In this paper, we characterize a ULF wave event with coordinated use of SuperDARN HF radars, optical instrumentation,...
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Fall 2012
Multi-Agent Simulation (MAS) is a widely used paradigm for modeling and simulating real world complex system, ranging from ant colony foraging to online trading. MAS describes a complex system by representing it as a collection of interactive and concurrent objects following a set of predefined...
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2011
Elkington, Scot R., Degeling, Alex W., Rankin, Robert
The process of magnetospheric radiation belt electron transport driven by ULF waves is studied using a 2-D ideal MHD model for ULF waves in the equatorial plane including day/night asymmetry and a magnetopause boundary, and a test kinetic model for equatorially mirroring electrons. We find that...