Global ETD Search
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Showing 1 to 13 of 13 for “"Hopping model"”.
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Computational Studies in Chemical Quantum Physics
Two stochastic dynamic models are used to study several aspects of curve crossing phenomena in dissipative systems. A surface hopping model is used to test the qualitative predictions of earlier theories. The simulation results agree well with the qualitative picture. Results are obtained for an …
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Stable hopping of a muscle-actuated leg system using positive force feedback
… environment of simple one-dimensional point mass hopping model with positive force feedback as well as experimental results of the same dynamical system are compared and studied in detail. Three important hypotheses are investigated. The first hypothesis involves positive force feedback and its …
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Interacting Anyons in One and Two Dimensions: Strong Zero Modes in Anyon Chains and Non-Abelian Anyons on a Torus
… chain is equivalent to a Zn chiral clock model. We then present numerical evidence for a strong zero mode in an SU(2)4 anyon chain. By rewriting the chain as an XXZ spin chain, we construct the zero mode explicitly in terms of spin operators. Finally, we write the zero mode in the …
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Influence of ag-doped on magnetic and electrical transport properties in Pr0.75Na0.25MnO3 manganites
… was found to fit well with the variable range hopping model (VRH) with the increasing of hopping and activation energy as the Ag concentration increased. While for the metallic region which is below the TMI, the resistivity data of y = 0.05 was fitted well with the combination of domain/grain …
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Electrically Conductive Low Dimensional Nanostructures: Synthesis, Characterisation and Application
… can be described using variable-range hopping model.
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Diffusion, sub-diffusion, and escape: A study of over-damped Brownian motion
… Comparison to that obtained from a lattice hopping model facilitates the construction of the multi-dimensional coarse-grained simulation scheme. Escape processes in multi-dimensional potentials are then studied. A framework to calculate the mean first-passage time is proposed and found to …
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Fast reverse osmosis through nanotube-based membranes: molecular dynamics study
… agreement with the theoretical single-file ""hopping"" model. Potential of mean force analysis indicates that the irregular nature of PMMA pore surface can cause significant localized energy barriers inside the pore, thereby reducing the water flux. In the second part, we investigated the …
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Studies of Radiation Effects in Three High Polymers
… Mylar and Ultem showed no significant change. A hopping model of conductivity, with radicals as hopping sites, is proposed to relate the postirradiation DC conductivity and total postirradiation organic radical density in Kapton.</p>
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Analytic Results for Hopping Models with Excluded Volume Constraint
… energy shift caused by a Brownian vacancy in a model for an extreme anisotropic binary alloy. In the last chapter we present a Monte-Carlo study and a mean-field analysis for interface erosion caused by mobile vacancies. Part II: One-Dimensional Periodic Hopping Models with Broken Translational …
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Space charge determination in HVDC power cable and its influence on electric field
… of the power cable are obtained based on the hopping model of conduction in dielectric and are utilised in the calculation of the total electric field. <br/><br/>To stage the cables working under a real world HVDC transmission system scenario, experiments on the space charge dynamics of the …
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Towards Developing an Integrated Microscopic Traffic Simulation Model for Large Road Networks
… Transport Systems (ITS), traffic has to be modelled. The inherent complexity which is a result of inter- and intra-driver heterogeneity, macroscopic feedback loops, local interactions, multi-modal transport and many more is tackled with simulations. By representing the (longitudinal) …
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Design and optimization of colloidal quantum dot solids for enhanced charge transport and photovoltaics
… carrier mobility was computed using charge hopping transport models. The experimental film deposition processes were replicated using a molecular dynamics simulation where the equilibrium positions of CQDs with a given radii distribution were determined under a granular potential. The radii …
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Monte Carlo simulation of ion transport of high strain ionomeric polymer transducers
… presented in this dissertation focuses on modeling the cation transport and cation steady state distribution due to the actuation of an IPT. Ion transport in the IPT depends on the morphology of the hydrated Nafion membrane and the morphology of the metal electrodes. Recent experimental …