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 20 of 418 for “"quiescent"”.
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Mathematical Models of Quiescent Solar Prominences
… magnetic topologies that have been used to model quiescent prominences. Some of the solutions even have the feet observed to drop into supergranule boundaries.</p>
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The Presidential Library System: A Quiescent Policy Subsystem
This study examines the Presidential Library System, an agency within the National Archives and Records Administration (NARA), as an example of a policy subsystem. A policy subsystem may be defined as an informal political coalition of individuals from different parts of a formal policy structure …
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Designing an ultra low quiescent current buck switching regulator
The new buck regulator proposed in this thesis was designed to operate with only a few micro-amps of supply current during no load output conditions, while maintaining low output voltage ripple. The regulator also has high efficiency for current loads above an amp to make the converter useful in a …
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Integrated DC-DC converter with ultra-low quiescent current
… circuitry of DC-DC converter with an ultra-low quiescent current of 150nA is presented here. Not only will this thesis discuss the challenges encountered over the course of designing circuits to operate at such low current levels, but it will also provide proof of concept silicon evaluation data …
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Experimental Design and Analysis of Piezoelectric Synthetic Jets in Quiescent Air
Flow control can lead to saving millions of dollars in fuel costs each year by making an aircraft more efficient. Synthetic jets, a device for active flow control, operate by introducing small amounts of energy locally to achieve non-local changes in the flow field with large performance gains. …
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Numerical Modeling of Synthetic Jets in Quiescent Air with Moving Boundary Conditions
… is to numerically model synthetic jets in quiescent air to study the influence of cavity geometry and boundary conditions of the piezoelectric diaphragm on jet velocity. Numerical simulation is performed for two synthetic jet cavities of different height and orifice diameter. The numerical …
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Factors influencing the behavior of hydrocarbons in stormwater runoff during quiescent settling
… of hydrocarbons in stormwater runoff during quiescent settling. Bulk runoff water samples were generated by simulation of a typical rainstorm. An area of pavement at a gasoline filling station was washed down with tapwater and the resultant runoff was collected and transported to the …
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Investigating the Morphology and Behaviour of Quiescent Neural Stem Cells in Drosophila Melanogaster
… tissues many stem cell populations reside in a quiescent state, in which the cell cycle is arrested and divisions cease. When needed, these stem cell can resume divisions in response to signals from the environment, a process known as reactivation. In this way stem cells can balance the amount …
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Low Reynolds Number Settling of Cylindrical Rods with Various Geometries in a Quiescent Fluid
… ratios ranging from 10 to 120, settling in a quiescent water-glycerin chamber to replicate Reynolds numbers below 7. A stereo-PTV system was employed, with two side cameras tracking terminal settling velocities and orientations, while a bottom camera captured potential spinning motions. Using …
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Self-similarity in the conformal framework of quiescent cosmology and the Weyl curvature hypothesis
… inflation is provided by the combined theory of quiescent cosmology and the Weyl curvature hypothesis. We augment the conformal framework of this theory by incorporating the spacetime property of self-similarity. A generalisation of the conformal Killing equation is developed as a definition of …
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Self-similarity in the conformal framework of quiescent cosmology and the Weyl curvature hypothesis
… inflation is provided by the combined theory of quiescent cosmology and the Weyl curvature hypothesis. We augment the conformal framework of this theory by incorporating the spacetime property of self-similarity. A generalisation of the conformal Killing equation is developed as a definition of …
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Settling Velocity of Straight and Curved Rods at Low Reynolds Numbers in a Quiescent Fluid
The present thesis is aimed towards understanding the effects of microfibre geometry on the settling velocity. Microfibres have been mathematically modelled as simple straight rods in the past to estimate their settling velocity; however, samples collected demonstrate complex geometries. One common …
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The Effect of Monomolecular Films on The Rate of Gas Absorption Into a Quiescent Liquid
Made available in DSpace on 2014-12-08T23:18:13Z (GMT). No. of bitstreams: 1 6604265.pdf: 3598369 bytes, checksum: b76db6b089afbe4d15deb225c07e1bad (MD5) Previous issue date: 1965
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Analysis of cyclin-CDK mediated regulation of the G1/S transition in post quiescent murine fibroblasts
… the role of specific cyclin complexes in post-quiescent cells. CDK inhibition reduced levels of CDC6, MCM2 and PCNA in all contexts. Evaluation of the role of individual cyclin-CDK complexes was performed by siRNA mediated depletion. Cyclin E1/E2 depletion showed that Cyclin E regulates CDC6, …
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Uncovering the Importance of Cell Morphology, Genetic Regulation, and Neuronal Signalling in Quiescent Neural Stem Cells
… These cells undergo quiescence, the state when quiescent cells are metabolically active but do not produce new neurons. Understanding and manipulating this critical state is essential due to undiscovered applications in regenerative biology and precision medicine, which lead to better outcomes …
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Transport and statistical mechanics of flexible chains and clusters of Brownian particles in quiescent viscous fluids
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1986.
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Design of Optical Measurements for Plasma Actuators for the Validation of Quiescent and Flow Control Simulations
The concept of plasma flow control is a relatively new idea based on using atmospheric plasma placed near the edge of an air foil to reduce boundary layer losses. As with any new concept, it is important to be able to quantify theoretical assumptions with known experimental results for validation. …
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The determination of diffusion coefficients for carbon dioxide and oxygen in water using a quiescent liquid absorption apparatus
… dioxide and oxygen in water at 25°C using a quiescent liquid absorption apparatus. Absorption curves were obtained for carbon dioxide in water using both a zero initial concentration and specific initial concentration of carbon dioxide. The evacuation pressure, operating pressure, initial …
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Exploring the global gene expression programs and regulation in the response of quiescent human fibroblasts to distinct proliferative stimuli
Serum treatment of quiescent human dermal fibroblasts induces proliferation coupled with a complex physiological response that is indicative of their normal role in wound-healing. However, it is not known to what extent such complex transcriptional events are specific to a given cell type and …
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