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Showing 1 to 20 of 384 for “"Kelvin"”.
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Mesospheric Kelvin-Helmholtz instability
This work examines the Kelvin-Helmholtz instability, comparing features extracted from a numerical fully nonlinear model to radar and rocket measurements of free electron density and neutral motions in the mesosphere. Previous models of shear instability are reviewed, and relevant mesospheric …
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Kelvin-Helmholtz Instability in Magnetized Plasma
… in many systems in the universe, are generally Kelvin-Helmholtz unstable. If the medium is ionized, the presence of a magnetic field can influence the evolution of this instability; depending on its strength and orientation, the field has either a stabilizing or destabilizing effect. We …
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Kelvin-Helmholtz instability in aluminium reduction cells
… between the layers, which gives rise to a Kelvin-Helmholtz instability, and the study of this effect is the subject of the thesis. The role of the basic steady flow is focused in this analysis, while most previous MHD analyses neglect it and emphasise on the interaction between the …
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Kelvin waves in a shoaling shallow sea
… these methods. The problem of a propagation of a Kelvin wave over a step-bottom in a semi-infinite canal closed at one end is considered. The solution obtained is compared with that generated by the long-time limit of a numerical solution for the time dependent initial value problem. A mean square …
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Multifluid Kelvin-Helmholtz instability in weakly ionised astrophysical plasmas
… on fluid instabilities, in particular the Kelvin-Helmholtz (KH) instability. The KH instability could, for example, play a role in the momentum transfer between the bowshock of a protostellar jet and its surrounding molecular cloud. In particular, changes to the development of the KH …
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The application of the Kelvin probe in materials science.
This thesis reports on the application of the Kelvin probe in materials science and in particular on the study of metal and semiconductor surfaces in both ambient and UHV environments. The concept of the work function φ and its importance as a parameter in materials science is discussed in the …
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Electron tunneling into superconducting mercury films below one degree Kelvin
The tunneling characteristics of an aluminum-aluminum oxide-mercury junction have been measured at temperatures down to Oo35°K. Additional structure over that seen in an earlier, higher-temperature experiment is reported. The data have been analyzed through the use of a computer program based on …
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On the numerical evaluation of the Neumann-Kelvin Green function
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1989.
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Numerical analysis and visualization of the ionospheric Kelvin-Helmholtz instability
… irregularities; namely the evolution of the Kelvin-Helmholtz instability (KHI) is studied. The simulation model consists of two-dimensional, electrostatic, nonlinear, and time dependent fluid equations that describe the KHI evolution. Spectral and pseudospectral methods are used to solve the …
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Superconducting Properties of Tin, Indium, and Mercury Below 1 Degree Kelvin
Made available in DSpace on 2015-05-12T17:12:27Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6202907.PDF: 1885363 bytes, checksum: bde9580259f563ab0c785cf3a0bd9417 (MD5) Previous issue date: 1962
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The thermal conductivity of magnesium between one and four degrees Kelvin
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1952.
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Identifying Signatures of Plasma Waves and Reconnection Associated with Kelvin-Helmholtz Activity
… Recent work has shown that reconnection in Kelvin-Helmholtz vortices can transport plasma into the magnetosphere. Previous studies have also shown that mode conversion at the magnetopause can generate kinetic Alfvén wave (KAW) activity. Both magnetic reconnection and plasma wave activity can …
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MMS Observations of the Kelvin-Helmholtz Instability and Associated Ion Scale Waves
… must be at work. One potential process is the Kelvin-Helmholtz instability (KHI). The KHI is a convective instability which operates at the fluid scale in plasmas, but is capable of driving secondary process at smaller scales. Previous work has shown evidence of magnetic reconnection, various …
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Study of semiconductor and metal surfaces using a novel scanning Kelvin probe.
… design and construction of a novel Scanning Kelvin probe (SKP) compatible with the Ultra-High-Vacuum (UHV) environment - the first automatic, high resolution, UHV-SKP in the UK. The Kelvin Probe is a capacitor device used to measure the work function phi between a vibrating reference …
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Spektroskopie und Mikroskopie einzelner Farbstoffmoleküle im Festkörper zwischen 1,4 Kelvin und Raumtemperatur
Die spektroskopische Untersuchung einzelner Moleküle in kondensierter Phase erstreckt sich erst über einen Zeitraum von zehn Jahren. In dieser verhältnismäßig kurzen Zeit vollzog sich eine rasante Entwicklung mit einer Vielzahl von Ergebnissen. Dies findet seinen Ausdruck in eigenen Tagungen und …
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Development and application of the scanning Kelvin probe for solar cell defect analysis.
The Kelvin probe is a non-contact, non invasive capacitor device capable of detecting changes in local work function and surface state and has become a valuable tool for surface science research. This thesis presents three years of work centred on the development and novel applications of the …
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Kelvin Probe Force Microscopy on Graphene Thin Films for Solar Cell and Biosensing Applications
… of open circuit voltage was investigated using Kelvin Probe Force Microscopy (KPFM) in the dark and under light irradiation. In our study, we have also demonstrated the fabrication of photovoltaic devices from cost-effective, water-soluble, and bio-sensitive acridine orange molecules. We …
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Application of scanning micro-tip and UHV Kelvin probes in surface and material characterisation.
… thesis we present work utilising the scanning Kelvin probe (SKP) for surface potential mapping and monitoring changes in work function due to environmental influences in ambient and UHV conditions. The SKP is a truly non-contact technique which determines local work function changes and surface …
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Analysis of Kelvin-Helmholtz Instabilities Developing from Oblique Shock Interaction with a Heavy Gas Column
… vortices, physically indistinguishable from Kelvin-Helmholtz instabilities (KHI). Certain characteristics of the KHI, such as initial instability growth rate and wavelength (lambda), depend on several factors including the Mach number of the shock wave, the shock tube angle of inclination …
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