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 17 of 17 for “"power-law exponent"”.
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Effects of hydrogen uptake and yttrium doping on the oxidation of zirconium-yttrium alloys
… material. An inverse relationship between power-law exponent of the weight gain and the hydrogen uptake has been observed. The space-charge-theory of oxidation has been used to explain the link between the kinetics and hydrogen uptake. Allowing for local charge imbalance to occur in the …
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Accelerated viscoelastic characterization of T300/5208 graphite- epoxy laminates
… creep compliance is assumed to follow a power law approximation. A recursive relationship is developed, based upon the Schapery single-integral equation, which allows approximation of a continuous time-varying uniaxial load using discrete steps in stress. The viscoelastic response of …
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Chemomechanics of attached and suspended cells
… during de- formation; rather, they behave as power-law (or "soft glassy") materials. Here, optical stretching is used as a non-contact technique to show that stress fibers and probe-cell contact are not critical in enabling power-law rheological behavior of cells. Further- more, suspended cell …
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Rheology and Processing of Animal and Plant-Based Dense Emulsions
… yield stress fluids reveals that even when the power law exponent governing the intermediate pinching dynamics is similar to the exponent obtained from the shear flow curve, the terminal pinching dynamics show strong local effects, influenced by interstitial fluid properties, finite drop size, …
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High pressure studies of superconductivity and anomalous normal states in novel quantum materials
… that we observed are (i) a cross-over from the power-law exponent n = 4/3 to n = 1 in resistivity from below and above 100 kbar (ii) a coexistence between a magnetic ordering and superconductivity. We interpret this to be a cross-over between itinerant ferromagnetic state and itinerant …
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Neuronal and Electrophysiological Markers of Glioma
… results. We also describe scale-free features (power law exponent) as well as distinct spectral features and reactivity to external stimulus in the tumoral and adjacent tissue of patients and provide novel insights in terms of glioma’s electrophysiology. The insights gained from these empirical …
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Theoretical study of nanoparticle formation in thermal plasma processing Nucleation, coagulation and aggregation
… aggregates is considered by introducing a power law exponent Df. Transport of nanoparticles occurs by convection, thermophoresis and Brownian diffusion. The method of moments is used to solve the particle dynamics equation. The model is validated using experimental results from plasma …
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How to Accurately Map the Milky Way with a Billion Sources: A Journey into the Gaia-verse
… heights of the thin and thick disks, the halo power-law exponent, local stellar mass density and surface density of the Milky Way. My thesis demonstrates the potential of Gaia when distances are well modelled and incompleteness is accounted for. My tools will be invaluable for answering further …
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Interplay of flow and microstructure in complex fluids: Semiflexible polymer solutions and emulsions
… from rod-like to coil-like of the shear thinning power law exponent. The dynamics of the collapse of a single, semiflexible polymer in a poor solvent are investigated via Brownian dynamics simulations. The rate of decay of uncollapsed states, the preferential pathways of condensation, and the …
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Understanding the nuances of the rockfall frequency-magnitude relationship: review and examples from two original case studies in Glenwood Canyon, CO, USA
… The relationship is frequently modeled with a power law fit to frequency vs. volume, and the power law provides a basis for extrapolating recurrence intervals and quantifying cliff retreat and sediment transfer. While the frequency-magnitude relationship is a commonly-used tool for summarizing …
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Perceptually Relevant Measurements in Tomosynthesis Imaging
… of this thesis evaluates the relevance of noise power spectrum (NPS) based metrics in characterizing the DBT images and their relation to human observer diagnosis performance. The NPS based power-law exponent beta was hypothesized to quantify tissue structural overlap and to use as a surrogate …
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Structures & algorithms in hyperbolic random graphs
… their degree distribution typically follows a power law. This means that the fraction of vertices of degree k is proportional to k^(−β) for some constant β; making these networks highly inhomogeneous. Furthermore, they also typically have high clustering, meaning that links between two nodes …
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Large eddy simulation of the upper atmospheric surface layer
… formulas, but close to Carl et al.'s —1/3 power law (1973). LES results of o-o/T*,, fit the empirical similarity formulas fairly well, and derive a power law exponent of about —0.4, which is smaller than —1/3. Similarity results for uti-,/u* in the USL has also been examined.
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Characterization of Carbon Mat Thermoplastic Composites: Flow and Mechanical Properties
… for FVFs of 8-40% and was found to follow a power law behavior based on the local bending of fibers up to a FVF of 20.9%. Above this FVF the power law exponent decreases, and this is attributed to fracture of some of the fibers. Heated platens were used to isothermally squeeze the CMT at …
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Intruder Dynamic Response in Particulate Media
… scales with the packing pressure $P$ as a power-law according to: $F_{c}(\mu) - F_{c}^{o}(\mu) \sim P^{\beta(\mu)}$. The power-law exponent, $\beta(\mu)$ becomes friction dependent, but approaches the value, $\beta(\mu\to0) = 1.0 \pm 0.1$ in the zero-friction limit. $F_{c}^{o}(\mu)$ is the …
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Predicting and identifying signs of criticality near neuronal phase transition
… Ornstein--Uhlenbeck theory to predict variance, power spectrum and correlation of voltage fluctuations during close approach to the critical point, identified as the point at which the real part of the dominant eigenvalue becomes zero. We validate the theoretical predictions with numerical …
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Graphlet based network analysis
… Examples of such properties include diameter, power-law exponent, and spectra of graph Laplacians. Such works enhance our understanding of real-life networks, or enable us to generate synthetic graphs with real-life graph properties. However, many of the existing problems on networks require …