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 16 of 16 for “"Threshold Conditions"”.
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Nonlinear microscopy for material characterization
… modification both above and below damage threshold conditions in HfO2 thin-films. FWM microscopy is employed to investigate FWM signals and implied finite response times in multiple substrates.
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Control by Vegetation Disturbance on Gully Rejuvenation Following Wildfire
… and the relationship between fire severity and threshold conditions required for channel initiation. I surveyed 269 burned catchments and mapped 111 cases of GR across sites in Montana and Idaho. I created the Vegetation Disturbance Index (VDI) derived from LANDSAT images to quantify fire …
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Control by Vegetation Disturbance on Gully Rejuvenation Following Wildfire
… and the relationship between fire severity and threshold conditions required for channel initiation. I surveyed 269 burned catchments and mapped 111 cases of GR across sites in Montana and Idaho. I created the Vegetation Disturbance Index (VDI) derived from LANDSAT images to quantify fire …
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Asymptotic analysis of mass-dominated convection in a nanofluid
The threshold conditions for the onset of convection in colloidal suspensions is investigated using the particulate medium formulation. We consider a dilute liquid suspension of solid spherical particles that is confined between two horizontal plates of infinite extent placed at the vertical …
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Analysis and design of systems utilizing blockchain technology to accelerate the humanitarian actions in the event of natural disasters
… and disburse required funding when certain threshold conditions are met prior to natural disasters. The proposed framework takes into consideration of blockchain technologies that are at the relatively early stage of development. The objectives are to develop novel early funding mechanism …
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GaN-based distributed feedback laser diodes and their applications
… fabrication improvements has also improved threshold conditions of GaN DFBs, exhibiting similar threshold currents to commercially-available FPs. <br/><br/>Additionally, research was conducted into one potential commercial application for GaN LC-DFBs, that being filtered optical …
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Corrosion fatigue initiation in stainless steels : The scanning reference electrode technique.
… for the nucleation of the fatigue crack. A threshold stress intensity factor range was then calculated, which was found to be similar to the values reported in the literature.It is suggested at the end of this thesis that parallel studies and measurements of the pit-to-crack transition can …
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Nonlinear Microscopy for Material Characterization
… modification both above and below damage threshold conditions in hafnia thin-films. These results imply that TH imaging is potentially sensitive to laser-induced strain as well as to nanoscale defects or contamination in oxide films. Compared to other sensitive imaging techniques such as …
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Fabrication of Designable and Suspended Microfibres via Low Voltage Electrospinning Patterning towards Replicating Extracellular Matrix Cues for Tissue Assembly
… pillars, a parametric study characterised threshold conditions and established a predictive model for patterning suspended fibres. The accuracy with which suspended fibres followed the in-plane tool path was also assessed. Scanning Electron Microscopy imaging measured fibre diameters 1-5 μm …
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Ionisation studies of chlorinated and fluorinated compounds
… polyatomic molecules have been studied using threshold photoelectron photoion coincidence and selected ion flow tube techniques for cations and an electron attachment mass spectrometer for anions. Cation formation has been studied for fluoroform (CHF\(_3\)), octafluorocyclobutane …
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Incipient Motion Under Shallow Flow Conditions
Laboratory experiments were conducted to investigate the effect of low relative depth and high Froude number on the dimensionless critical shear stress (Shields parameter). Spherical particles of four different densities and an 8mm diameter were used as movable test material. The relative depth …
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Image based analysis of visibility in smoke laden environments
… and computer modelling. Unlike the traditional threshold of visual distance, visibility in the current study has been defined as a continuous function changing from clearly discemable to completely invisible. It allows the comparison of visibility under various conditions, not just limited to …
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Local scour at bridge piers
… equilibrium scour depth reaches a maximum at the threshold condition of the bed sediment. Above the threshold velocity, the scour depth first decreases and then increases again with increasing velocity to a maximum at the transition flat bed condition. At still higher velocities, the equilibrium …
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PCO2 EFFECTS ON THE PRODUCTION OF PELAGIC BIOGENIC CARBONATE AND OCEAN CHEMISTRY: A CASE HISTORY FROM THE CRETACEOUS.
… organic carbon-rich sediments under oxygen-poor conditions, named the Oceanic Anoxic Event 1a (OAE1a) (~120 Ma) which has its sedimentary expression in the Selli Level. OAE1a represents a profound perturbation of the ocean-atmosphere system caused by natural CO2 emissions related with climate …
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The Electronic and Vibrational Spectroscopy of Matrix-Isolated Phthalocyanines – Experiment and Theory
… exhibited by this vibronic transition and the threshold conditions have been investigated. In light of the success of the DFT Raman spectra to correctly predict both the positions and relative intensities of the vibronic emission bands of H2Pc and ZnPc, the optimized geometries, vibrational …
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The Electronic and Vibrational Spectroscopy of Metal Phthalocyanines and Metal Phthalocyanine Chlorides Isolated in Low Temperature Solids
… by this vibronic transition, and thus the threshold conditions and lifetime of this emission band are investigated. The narrow bandwidths of the AE bands allow for the identification and classification of phonon structures in emission and excitation, as well as the resolution of individual …