Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Plasma bubble"”.
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Intensification of Micro-Plasma Bubble Processing for N-Fixation and its Potential Application
… the intensification of non-thermal micro-plasma bubble processing for nitrogen fixation and reviewed its application both on Earth and in space. The study was carried out by performing five main tasks, these being: (1) air/N2 plasma processing in batch water/recycling water with/without …
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Tomographic Imaging and Characterization of Ionospheric Equatorial Plasma Irregularities With the Global Ultraviolet Imager
The experimental aspect explores the equatorial plasma bubble imaging capabilities of this technique and its scientific impact. Retrievals of altitude and longitude profiles allow for characterization of plasma bubbles based on their structure and depth of depletion. This information can then be …
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Intense spreading of radar echoes from ionospheric plasmas
On December 25, 2004, a large-scale ionospheric plasma bubble was observed over Arecibo Observatory in Puerto Rico, inducing significant range spreading on ionograms. This phenomena may be explained by means of the E x B instability and gravitational Rayleigh-Taylor instability. A derivation of the …
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Evaluating the Capability of ICON-MIGHTI to Detect Plasma Bubbles in the Ionosphere
… day-to-day brightness potentially indicative of plasma bubbles: regions of low-density E-region plasma which rise through the F-region and cause radio scintillation that interferes with communications and GPS performance. Here, we explore the possibility of MIGHTI observing plasma bubbles by …
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Parameter Estimation from Retarding Potential Analyzers in the Presence of Realistic Noise
… C/NOFS orbit when the satellite passed through a plasma bubble. The low signal-to-noise ratios (SNR) of measured I-Vs in these bubbles make autonomous parameter estimation notoriously difficult. We thus propose a method for robust autonomous analysis of RPA data that is reliable in low SNR …
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Observations of the thermosphere using measurements from long-term Fabry-Perot interferometers
… historically lacking compared to the plentiful plasma datasets. Neutral wind and temperature data are needed to understand and validate the physics of the upper atmosphere. As satellites do not provide high-resolution temporal coverage over a given region, stationary ground-based systems are …
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The cavitation subharmonic signal : mechanistic source and optimised detection
… held to be exclusive to the occurrence of driven bubbles within a host medium. Recently, detection of the subharmonic signal has seen a resurgence of interest, particularly for the prospect of cavitation-mediated therapy during the application of focused ultrasound to tissue. Remarkably, …
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Multi-physics modeling of plasma discharge and material removal in micro electro-discharge machining process
… understand formation and expansion of micro-EDM plasma, and the process of formation of melt-pool and material removal at the workpiece. Initially, a model of micro-EDM plasma has been developed using a ’Global Model’ approach in which the plasma is assumed to be spatially uniform, and equations …
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Techniques for automated classification of nighttime ionospheric images
… of interest are those that contain equatorial plasma bubbles (EPB) or medium-scale traveling ionospheric disturbances (MSTID). However the majority of the images collected contain neither EPBs nor MSTIDs, or are contaminated by other light sources or clouds. In order to identify the images of …