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.
Results
Showing 1 to 19 of 19 for “"Power-law scaling"”.
-
Holography for the practical person
… in two previous studies --- one that reports power-law scaling for the mid-frequency regime of the optical conductivity and one that does not. We find no evidence for power-law scaling of the conductivity, thereby corroborating the previous negative result that gravitational crystals are …
-
Metallic Ground State of Functionalized Carbon Nanotubes
… such as spin-charge separation and non-universal power laws in some physical properties such as the electronic density of states (DOS). Angle-integrated photoemission spectroscopy provides direct access to the DOS and as such directly addresses the power law renormalization of a TLL. It is first …
-
Probing the dynamic scaling hypothesis in 1-D coarsening particle systems
… length scales grow in time. The Dynamic Scaling Hypothesis which asserts that upon suitable scaling of space, features of latetime structures are indistinguishable is the main consideration in this thesis and we will investigate two 1-D coarsening dynamical systems, one for which The …
-
Observation of the Kibble-Zurek mechanism in a bosonic gas
… different systems in nature, and it predicts a power-law dependence of the defect density on the quench rate. This thesis reports on the results of the experimental study of the Kibble-Zurek mechanism in elongated Bose-Einstein condensates of atomic sodium gases, following the observations on …
-
Optical properties of ultra-thin niobium nitride films for single photon detectors
… study was also tested against a universal scaling law for thin film superconductors, which seems to support the existence of the critical thickness, below which the properties change significantly and do not conform to the power law scaling that holds for thicker films. Finally, I explored …
-
Kinetic Roughening During Hot-Wire Chemical Vapor Deposition of Hydrogenated Amorphous Silicon
… local slope of the surface is found to exhibit power law scaling with time that is consistent with anomalous roughening behavior also observed in models that include shadowing. A temperature-dependent transition in roughening behavior is observed, and an activation energy is extracted that …
-
The trial of the holographic principle
… hole metric dual to the flow. Investigation of power law scaling of the Einstein tensor indicates success at 0th and 1st, but not the 2nd order. We have also observed in a low-resolution simulation that the hydrodynamic flow supports turbulence, which prompts the question of the interpretation …
-
Rheology and Microstructure of Filled Polymer Melts
… times in the viscous modulus that display power law scaling with volume fraction. Above entanglement, the slow dynamics is qualitatively different resembling the behavior of a gelled suspension yet lacking any sign of scattering from particle agglomerates. As polymer molecular weight is …
-
Geometry, evolution and scaling of fault relay zones in 3D using detailed observations from outcrops and 3D seismic data
… overlap/separation) are documented to follow power-law scaling relationships over nine orders of magnitude with a mean AR of 4.2. Approximately one order of magnitude scatter in both separation and overlap exists at all scales. Up to half of this scatter can be attributed to the spread of …
-
Debris collision avoidance maneuver optimization (CAMO) for satellite constellations
… 18-fold increase in fuel cost representing a power-law scaling with reduced warning time. 2. Quarter-Period Optimal Time Scale: When unconstrained, the optimization algorithm consistently converges to a maneuver duration of k ≈ T /4 (where T is the orbital period), representing the fundamental …
-
Stability and Morphological Evolution in Polymer/Nanoparticle Bilayers and Blends Confined to Thin Film Geometries
… SD in 60 wt% PtBA blend films is also explored. Power law scaling for the characteristic wavevector with time (q ~ t^n with n = -1/4 to -1/3) during the early stages of phase separation yields to domain pinning at the later stages for films annealed at 75, 85, and 95°C. In contrast, domain growth …
-
Non-universal behavior of intermittent flow in microplasticity
… previous experimental results) of a truncated power-law distribution, the power-law scaling exponent is not found to be “universal” as some theories predicted, instead being significantly affected by material (especially crystal structure), loading orientation, and drive rate, with the exponent …
-
The roles of mixing, geothermal heating, and surface buoyancy forcing in ocean meridional overturning dynamics
… circulation model. In addition to the system's scaling behavior, the consequences of diapycnal mixing location, the impact of deep buoyancy fluxes, and the importance of the surface restoring timescale are considered. As required by advective-diffusive balance, upwelling across isopycnals in low …
-
What can we learn from climate data? : Methods for fluctuation, time/scale and phase analysis
… about the climate system. Since some decades powerful computers are capable to simulate the past and future evolution of climate. Time series analysis tries to link the observed data to the computer models: Using statistical methods, one estimates characteristic properties of the underlying …
-
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 …
-
Pair density wave superconducting states and statistical mechanics of dimers
… of the SC phases generically exhibit a power-law scaling with the coupling constants of the array, instead of the essential singularity found in weak-coupling BCS-type theories. Electronic excitations with an open Fermi surface, which emerge from the electronic Luttinger liquid systems …
-
Synthesis-Structure-Property Relationships in Lead-Free Piezoelectric Materials
… specimen. Dynamic hysteresis behaviors and power-law scaling relations of all specimens were determined from P"CE field hysteresis loop measurements as a function of frequency. All systems were found to exhibit similar dynamic scaling relationships. Hysteresis area, Pr and EC decreased with …
-
Deformation and residual stresses at the intragranular scale – a study using high energy x-ray diffraction and modeling in polycrystalline alloys
… grains in Ti-7Al. In particular cases, a power-law type scaling relationship was established between the size and the probability distribution of the plasticity events. A mesoscale field dislocation mechanics based crystal-plasticity model was employed to demonstrate slip system activity …
-
Statistics of slip avalanches in sheared amorphous materials based on atomistic simulation
… and show scale free features, as evidenced by a power-law probability distribution of the magnitude of serrations in stress-strain curves. Mesoscale models of amorphous plasticity, depending on assumptions of the interaction between slipped sites, give different predictions of scaling exponents. …