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 8 of 8 for “"current stability."”.
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Power System Parameter Estimation for Enhanced Grid Stability Assessment in Systems with Renewable Energy Sources
… complicates matters. Attempts to assess the current stability of the grid make use of several key parameters, however obtaining these parameters to make an assessment has its own challenges. Due to the limited number of measurements and the unavailability of information, it is often difficult …
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Current limiters based on silicon pillar un-gated FET for field emission application
… ungated field effect transistors (FETs) as current limiters to individuallycontrol emission current in a field emitter and provide a simple solution to three problems that have plagued field emission arrays-emission current uniformity, emission current stability and reliability. The ungated …
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Comparing Solution-Phase and Gas-Phase Protein Stability Using Ion Mobility and Differential Mobility Mass Spectrometry
… biopharmaceutical products is the proteins stability. Current stability assays are lengthy but some quick stability assays to determine the proteins melting temperature include thermal ramps of a protein using a fluorescent dye to monitor unfolding. Protein unfolding has also been studies …
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Stability of Field Emitter Arrays to Oxygen Exposures
… In addition, we also evaluated the emission current stability of gold-coated field emitter arrays to oxygen exposures. oxygen at 1x10-6 torr was introduced into the chamber through a leak valve for different lengths of time and duty cycles. To ensure identical oxygen exposure and experimental …
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Development of off-axis photoemission for 4-dimensional ultrafast electron microscopy
… enough to mitigate the effects of laser pointing stability changes. Such designs also have the advantage of versatility: the LaB6 can be aligned and used for both thermionic emission and photoemission entirely in-situ. However, LaB6, due to low work function and surface chemical instability, has …
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Intelligent field emission arrays
… applications. For most applications, temporal current stability and spatial current uniformity are major concerns. Using the kinetic model of electron emission, field emission can be described as two sequential processes- the flux of electrons to the tip surface followed by the transmission of …
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Proudový zdroj pro elektronovou optiku
Tato diplomová práce se zabývá návrhem přesného proudového zdroje pro magnetickou čočku. Nejprve je vysvětlena elektronová mikroskopie, protože magnetická čočka neboli cívka, je součástí elektronového mikroskopu. Dále je vysvětlen princip řízení magnetické čočky a její vlastnosti. V další části je …
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Modifications and studies of the anode catalyst layer for the direct formic acid fuel cell
… the palladium-decorated CNT showed a current of 0.18 mA cm-2 , while the standard palladium black catalyst only showed a current of 0.082 mA cm-2 at 0.3 V vs. RHE . This is a 120 % improvement. Also during a 12 hour chronoamperogram at 0.3 V vs. RHE, the palladium-decorated CNT …