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 674 for “"power-law"”.
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Power-law liquid in high-temperature superconductors
… of cuprate superconductors can be described by a power-law liquid, a state of matter with a power-law self-energy $\Sigma^{\pr\pr}\sim(\omega^{2}+\pi^{2}T^{2})^{\alpha}$. The scaling exponent decreases from $\alpha\sim1$ in the overdoped Fermi-liquid state to $\alpha\lesssim\frac{1}{2}$ in the …
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Storage and processing systems for power-law graphs
… graphs, peer-to-peer overlay networks, electric power grid networks, etc. Many real- life graphs are power-law graphs. A fundamental challenge in today’s Big Data world is storage and processing of these large-scale power-law graphs. In this thesis, we show that graph processing can be made …
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Effects of power-law entrainment on bubble fragmentation cascades
… by an entrainment size distribution 𝐼(𝑎) with power-law slope 𝛾 and large-radius cutoff 𝑎ₘₐₓ. The focus is the interaction between turbulence-driven fragmentation and free-surface entrainment, and, for simplicity, other mechanisms such as degassing, coalescence, and dissolution are ignored. Of …
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Flow of power law fluids with application to oil drilling
… study of the flow behaviour of inelastic power law fluids in two different types of flow situation. These are: 1. The creeping motion of a sphere moving through an expanse of liquid. 2. The combined steady and oscillatory flow of a liquid through a straight tube of circular cross section. …
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Information technology and the rise of the power law economy
… top earners can be explained by the rise of the "power law economy" and argue this reflects increased digitization and networks. Specifically, tax data (1960-2008) show that a bigger share of individual incomes are drawn from a power law, as opposed to the long-established log-normal distribution. …
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Power-law distributions in events involving nuclear and radiological materials
… statistical and mathematical distributions. Power-law distribution is a good candidate because it is a probability distribution with asymptotic tails, and thus can be applied to study patterns of rare events of large deviations, such as those involving nuclear and radiological materials. This …
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A NUMERICAL STUDY OF NONLINEAR VISCOELASTIC FLOW AND NONISOTHERMAL POWER-LAW FLOW
… and a modified Graetz heat transfer problem for power-law fluids between parallel plates are numerically studied. The constitutive model used for the viscoelastic fluid flow extends the Maxwell equation of linear viscoelasticity to the non-linear region by letting both relaxation time and elastic …
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On the solution of external laminar free convection to power law fluids
"Pseudoplastic fluids (power law fluid index N [less than] 1), dilatant fluids (N>1), and even Newtonian fluids (N=1) are commonly called power laws fluids, because they show an empirical shear stress (T)-strain rate (relationship known as the power law where N and m are empirical constants …
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MANY-BODY ENTANGLEMENT DYNAMICS AND COMPUTATION IN QUANTUM SYSTEMS WITH POWER-LAW INTERACTIONS
… interactions—such as those that decay as a power-law in the distance between particles—are promising candidates for quantum information processors. Due to their high degree of connectivity, they are potentially capable of generating entanglement more quickly than systems limited to local …
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Indentation vs. Uniaxial Power-law Creep of Sn-based Solder Material: A Numerical Assessment
… between indentation creep and uniaxial power-law creep. Two stages of numerical simulation were involved, the first a uniaxial creep test and the other an indentation test. Both were based on rate-dependent viscoplastic behavior as the input material model for the pure Sn and Sn alloys. …
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A penalty finite element model for axisymmetric flows of power-law and white-metzner fluids
… flows of viscous incompressible fluids obeying power-law and White-Metzner constitutive relations is developed. The formulation accounts for inertial (or convective) terms. For power-law fluids, two different finite element models are developed: one based on the velocity formulation (i.e., only …
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Mass transfer from spherical gas bubbles and liquid droplets moving through power-law fluids in the laminar flow regime
… spheres of a Newtonian fluid traveling through a power-law type continuous phase in to so-called creeping-flow region. The Nakano and Tien stream functions allow the Sherwood number to be determined as a function of the Peclet number, power-law index, and a viscosity ratio parameter. The Hirose …
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Quantification of long-range power law correlations among healthy and pathologic subjects using detrended fluctuation analysis and multifractal detrended fluctuation analysis
… and it revealed the presence of long-range power law correlation for the group of healthy subjects while breakdown in the long-range power law correlation for the group of subjects with cardiac heart failure. Application of DFA analysis shows evidence for a crossover phenomenon associated …
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Investigation of indentation derived creep response using constant load and constant strain rate methods
… features; however, the conventional uniaxial power-law creep test may be impractical for small scale materials. Accordingly, instrumented indentation techniques are frequently employed. This study concerns the employment of instrumented indentation to characterize the power-law creep response …
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Helical flow of non-Newtonian fluids, with reference to drilling fluid flow.
… to describe completely the helical flow of a power law fluid. A set of velocity profile graphs is presented, covering typical values of these three parameter groups. From this set of graphs, the velocity profiles for most practically occurring flows of power law fluids may be interpolated. …
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Kinetics of Plastic Flow in Polycrystal Plasticity
… threshold stress continuum model. A modified power law is used to determine slip system activity without introducing artificial strain rate sensitivity. In addition, a slip system hardening law is introduced that is capable of modeling stage IV hardening. The evolution law uses two state …
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Understanding of weak turbulence of capillary waves
… WTT steady-state analytical solution yields a power-law inertial-range spectrum I - ka, with a constant energy flux P from large forcing scales to small dissipative scales. Over the years, this result has found applications in various physical contexts including plasma physics, optics, internal …
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Modeling repairable system failure data using NHPP reliability growth mode.
… Poisson process (NHPP) often known as the Power Law model is regarded as one of the best models for repairable systems. The goodness-of-fit test rejects the intensity function of the power law model, and so the log-linear model was fitted and tested for goodness-of-fit. The Weibull Time to …
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Beyond particles and localities in quantum matters
… that we investigate include the fractional power-law in optical conductivity, the power-law liquid form of the scattering life-time, the violation of the conductivity sum rule, and the appearance of the anomalous dimension for the current. Our results suggest that the correct description of …
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Decoherence, Master Equation for Open Quantum Systems, and the Subordination Theory
… sojourn times are distributed with an inverse power law. Thus, a proposal to turn the model for Poisson fluorescence intermittency into a model for non-Poisson fluorescence intermittency is made. The collision-like interaction of the two-state system with the environment is assumed to takes …
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