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 26 for “"weak dependence"”.
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Effect of size and surface structure manipulation on the luminescent properties of silicon nanoclusters
… the modified clusters were studied, revealing a weak dependence of the luminescence efficiency on exchanging the surface hydrogen atoms for other single bonded species. The observed optical activity of silicon nanoclusters makes them an important material for a variety of scientific applications.
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Similarity relations of wind waves in finite depth
… from the data. The relations indicate a weak dependence of the spectral parameters on depth. Various source terms in the energy balance equation for wave growth in finite depth water are estimated for two cases of wave evolution. The relative importance of wind input, bottom dissipation, …
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Differential Diffusion of Scalars in Sheared, Stratified Turbulence
… compared to salt for strongly stratified, weakly turbulent flows. In the presence of differential diffusion, buoyancy flux and mixing efficiency at the interface are functions the density ratio and entrainment laws for a two scalar flow exhibiting differential diffusion agree with laws for …
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Computational Assessment of Flow through a High-Flow Nacelle Bypass for Low Supersonic Boom
… and detailed single channel calculations show a weak dependence on the turbulence model used for the mean flow predictions as well as strong turbulence-shock interactions. The clean and vaned aft bypass sections exhibit reasonable agreement with the experimental data but show a stronger influence …
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In situ transmission electron microscopy ion irradiations of model iron-chromium alloys
… loops seen in irradiated pure iron. A very weak dependence was found on the specific chromium content of the alloy. Chromium was shown to suppress defect growth by inhibiting defect mobility in the alloy. While defects in pure iron are highly mobile and able to grow, those in the FeCr alloys …
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A study of the damage accumulation process in poly(aryl ether ketone ketone) and its AS4 carbon fiber reinforced composites
… that the ultimate mechanical properties show a weak dependence on the applied heat treatment, whereas the damage accumulation process changes dramatically. A model has been developed to simulate the damage accumulation process. This model has then been used to predict the fatigue S-N curve in …
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Studies on the effects of material properties structure and electrode morphology in the electrorheological response
… While these fluids under DC conditions behave as weak ER fluids, at low AC frequencies ($<$50Hz) the particles perform an oscillatory motion following the changing polarity of the electric field and no electrode spanning structure is observed. Nevertheless, an increase in the shear stress over …
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Statistical inference from dependent data : networks and Markov chains
… In this thesis, we explore how to model such dependences between samples using structured high-dimensional distributions which result from imposing a Markovian property on the joint distribution of the data, namely Markov Random Fields (MRFs) and Markov chains. On MRFs, we explore a …
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Impact of unsteady secondary air flow interaction with main flow on loss generation in axial turbines
… at that point). Purge flow induced loss has a weak dependence on the width of the purge duct and angle of injection.
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Spectral densities of discrete and continuous-indexed random fields
… When these random fields satisfy certain linear dependence conditions uniformly, each will have a spectral density function (not necessarily continuous) that is bounded between two positive constants. These spectral density functions will converge in a weak sense to another function (not …
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Growth kinetics and doping of gallium nitride grown by rf-plasma assisted molecular beam epitaxy
… of nitrogen metastables produces a temperature dependence more consistent with decomposition rates. Growth with molecular nitrogen metastables results in significantly improved electrical properties.;Magnesium incorporation was studied for both (0001), or Ga-polarity and (0001), or N-polarity, …
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Trapped-modes, slow light and collective resonances in metamaterials
… an infinite array are very similar resulting in weak dependence on disorder. <br/><br/>The first metamaterial analogue of electromagnetically induced transparency is demonstrated experimentally and theoretically in essentially planar structures. The phenomenon arises from destructive interference …
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Stress evolution of lithium alloying electrodes during cycling
… stresses observed in lithium-germanium and their weak dependence on cycling rate may explain why germanium offers improved cyclability and reduced rate sensitivity compared to silicon. In addition to uncoated electrodes, lithium phosphorous oxynitride (LiPON) coated electrodes were also examined. …
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XUV probing of warm dense matter
… were not consistent with the predictions of a weak dependence on photon energy in this range. Refractive index measurements were inconclusive due to ambiguity in the measurements of the phase shift, though this proved valuable as a proof-of-concept for future work.<br/><br/>The analysis methods …
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The Pressure Dependence of the Low Temperature Thermal Properties of an Amorphous Polymer
… behavior and as universal for its apparently weak dependence on chemical composition of the glass. For temperatures below 1 K the phenomemological Tunneling Model and the existence of phonons can account for the observed behavior, which is indicative of localized two-level excitations. For …
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The pressure dependence of the low-temperature thermal properties of an amorphous polymer
… behavior and as universal for its apparently weak dependence on chemical composition of the glass. For temperatures below 1 K the phenomemological Tunneling Model and the existence of phonons can account for the observed behavior, which is indicative of localized two-level excitations. For …
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Unveiling the Primary Quenching Mechanisms in Galaxies through Large Spectroscopic Surveys
… further find that the environment leaves a much weaker imprint on the stellar populations of galaxies than was previously thought. Satellite galaxies are only marginally more metal-rich and older than central galaxies of the same stellar mass, with stellar metallicities that show only a weak …
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Properties of thin film III-V/IV semiconductor alloys and nanostructures
… create regions of lower bandgap, resulting in a weak dependence on luminescence as a function of Ge composition as well as lower bandgap than the homogeneous alloy with the same composition. As silicon was added to the (GaAs)₁-x(Ge₂)x alloy, the bandgap increased despite the composition …
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Novel angular and frequency manipulation of light in nano-scaled dielectric photonic systems
… samples that show resonance-induced colors with weak dependence on the viewing angle. We also show that the colors can be dynamically tuned by stretching the photonic crystal slab fabricated on an elastic substrate. In a follow up work, we address how to overcome the challenge of mode leaking on …
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Electrical and magnetic properties of twin-free single-crystal praseodymium-doped YBa2Cu3O7-d
… results show that for Tffc < 0.45, U exhibits a weak dependence on Pr concentration, whereas for T/Tc > 0.45, U shows a clear maximum at x = 0.2. In addition, we measured magnetic hysteresis loops for each sample at T/Tc = 0.1, 0.5, and 0.8. We found that the samples exhibit a strong …
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