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 “"Ballasting"”.
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A study of ballast and ballasting
Thesis (B.S.)--Michigan State College of Agriculture and Applied Science, 1948
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Advanced High-Frequency Electronic Ballasting Techniques for Gas Discharge Lamps
… addresses advanced high-frequency electronic ballasting techniques by using a single-stage PFC approach. The proposed techniques include single-stage boost-derived PFC electronic ballasts with voltage-divider-rectifier front ends, single-stage PFC electronic ballasts with wide range dimming …
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<i>Trichodesmium</i> spp.: Numerical Studies of Resource Competition, Carbohydrate Ballasting, and Remote-Sensing Reflectance
… resource competition; (2) carbohydrate ballasting by <em>Trchodesmium </em>and implications for the formation of surface accumulations; and (3) the vertical distribution of <em>Trichodesmium</em> and implications for detection from space.</p> <p>The first study focuses on issues of …
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Gravity selector-enabled kenaf recirculation and reuse as a renewable ballasting agent for sludge settleability enhancement in a municipal wastewater secondary process: A real wastewater pilot-scale study
… of hydrocyclones to retain and return the ballasting agent. This idea was tested by dosing kenaf, a plant-based renewable migrating carrier in a pilot-scale plug flow reactor equipped with a gravity selector to mimic a hydrocyclone. Results showed that kenaf could gradually reduce the …
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An improved electronic ballast for the fluorescent lamps
… (PFC), has become an attractive topology for ballasting the fluorescent lamps because it eliminates the use of a bulky boost inductor. But the high voltage stress on the semiconductor devices at light load conditions, the high total harmonic distortion (THO) of the line current, and the poor …
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Design and Simulation of a Towed Underwater Vehicle
… including procedures for trimming and ballasting the towfish.
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Characterization of Antibiotic Resistance in <i>Vibrio cholerae</i> Isolated From Ships' Ballast and Other Environmental Sources
… for the introduction of macroorganisms via ballasting operations, but what is less known is the role of ballast water and residuals in the spread of potentially harmful microbes, especially with reference to novel genotypes. Of particular interest are the genes encoding for various forms of …
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Tracking and monitoring marine animals with vision-guided underwater vehicles
… controllers while minimizing tuning and re-ballasting in the field. This encourages AUVs to be more opportunistically deployed with new payloads and enables them to follow fast-moving organisms or operate within complex seafloor environments. Finally, we investigate whether AUVs themselves …
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Shelf biogeochemical interactions and feedback processes in the Benguela upwelling system
… POC export is high in coastal waters due to ballasting of diatom biomass. The models used in this study simulated biogeochemical interactions in the Benguela fairly-well and can be applied in other regions.