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 61 for “"Phenomenological models"”.
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Phenomenological models of motor proteins
… parameters and increase the relevance of the models. Mechanical understandings of motor proteins are obtained by using an experimental technique of observing the motion of a large cargo elastically attached to it. On modeling the effect of the elastic motor-cargo link on the motion of the …
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Learning and investigating phenomenological models for active matter
… algorithms for learning interpretable continuum models have shown promising potential for the recovery of underlying partial differential equations (PDEs) from continuum simulation data. Motivated by these advancements, in this thesis we analytically and numerically investigate phenomenological …
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Phenomenological models in biological physics : cell growth and pluripotency maintenance
… of the complex biological system. A phenomenological model that involves just a few essential, easily measurable parameters that capture the essence of the complex biological system may provide insights that a many-parameter, large scale model may not provide. In this thesis, we …
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Gas Sorption and Swelling in Glassy Polymers - Combining Experiment, Phenomenological Models and Detailed Atomistic Molecular Modeling
In der vorliegenden Arbeit werden grundlegende Fragen zur Gas-Sorption und der damit verbundenen Quellung von glasigen Polymeren untersucht. Dabei wurde eine kombinierte Analyse aus experimenteller Charakterisierung, detailliert atomistischer Modellierung und phänomenologisch-theoretischer …
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Light scattering on the high-temperature superconductors
… phase. In all cases, the analysis and proposed phenomenological models involved either an examination of the inelastic background scattering or the phonon excitation spectrum.
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Beyond particles and localities in quantum matters
… In this dissertation, we construct several phenomenological models based on the notions of unparticles and nonlocalities to explain some of the exotic properties of the high temperature cuprate superconductors. The properties of the cuprates that we investigate include the fractional …
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Using Z-hadron correlations to probe the medium response in PbPb and pp collisions at √ˢNN = 5.02 TeV
… in pp collisions. Those results are compared to phenomenological models that include medium-recoil, medium response and thermalization of the QGP wakes.
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Inclusive hadron production in electron-positron collisions with center-of-mass energies from 50 to 61.4 GeV
… are compared with various theoretical and phenomenological models. The differential cross sections for the K⁰ and Λ⁰ are calculated and compared with other experiments. Measurements of the ratio of production of vector mesons to vector plus pseudoscalar mesons and the ratio of the …
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Experimental and numerical investigation of phonon mean free path distribution
… important to engineering size effects. Phenomenological models of phonon relaxation times can give us some sense about the mean free path distribution, but they are not accurate. Further improvement of thermoelectric performance requires the phonon MFP to be known. In this thesis, we …
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Light vector meson production at forward rapidity in pp collisions at the LHC with the ALICE detector
… in this regime are based on QCD inspired phenomenological models that must be tuned to the data. The ALICE experiment at the LHC can access vector mesons produced at forward rapidity through their decays in muon pairs. I show the ratio Nø/Nρ+ω vs pT , the ratios σρ/σω and σΦ/σω, and the Φ …
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Electronic light scattering in the layered cuprates
… layers. In both cases the analysis and proposed phenomenological models involved an xamination of the inelastic ackground continuum. The room temperature investigations of the dynamics of the copper oxygen planes revealed strong anisotropy of the electronic scattering and established copper …
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Magnetic reconnection in high-temperature plasmas : excitation of the drift-tearing mode and the transport of electron thermal energy
… the electron thermal energy transport. Two phenomenological models that illustrate this possibility are considered. In particular, we demonstrate that a localized reduction in parallel electron thermal conductivity, or a localized depression in the electron temperature gradient cause a …
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Validating Forecasting Strategies of Simple Epidemic Models on the 2015-2016 Zika Epidemic
… into validating forecasts of simple epidemic models. We use incidence data from the 2015-2016 Zika virus outbreak in Antioquia, Colombia, to assess what model features result in accurate forecasts. We employed the Parametric Bootstrapping and Ensemble Kalman Filter methods to assimilate data …
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Real-Time Dynamics of Electrons and Phonons from First Principles
… cannot be described by equilibrium theories or phenomenological models such as the two-temperature model. This dissertation develops and applies a real-time, ab initio framework based on the time-dependent Boltzmann equation (TDBE) to investigate coupled electron–phonon dynamics in crystalline …
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Investigation of Thin Film Supercurrent and Photodetection in Wide Niobium Nitride Wires
… the nanowire is continually evolving. Early phenomenological models suggested that a hot region forms across the superconducting strip after the arrival of a photon, producing a measurable voltage only if the diameter of the hot region extends across the width of the strip. However, …
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Polymer/Clay Nanocomposites as Barrier Materials Used for VOC Removal
… permeation decreased even at low clay content. Phenomenological models such as those of Cussler and Nielsen were used to model the experimental permeation results. These models suggest that although the aspect ratio of the clay platelets is within the specifications provided by the manufacturer, …
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The Environment Of Galaxies And Groups Of Galaxies
… we employ two numerical tools - semi- analytical models and N-body plus hydrodynamical simulations of large scale structure and individual galaxies - to explore the underlying physics governing the formation and evolution of groups of galaxies, and the role of environment in generating polar …
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Benchmarking of neutrino energy reconstruction methods using electron-deuterium scattering data
… 𝐸, their interpretation relies heavily on phenomenological models of neutrino-nucleus interactions to infer 𝐸. Here, we exploit the similarity of electron- and neutrino-nucleus interactions, and use electron-scattering data with known beam energies to test energy reconstruction methods and …
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Study of reduced order models for vortex-induced vibration and comparison with CFD results
… results can be difficult, but there are existing phenomenological models that attempt to describe VIV, several of which will be explored in this thesis. These models consist of a structural equation representing a simple sprung bluff body coupled to a wake equation representing the effects of the …
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Atomistic and ab initio prediction and optimization of thermoelectric and photovoltaic properties
… quantitative predictions not available from phenomenological models, such as the existences of a minimum value of KL as the nanostructure size is varied and of configurational dependence of KL. We carry out the minimizatin of KL in the space of atomic configurations in SiGe alloy nanowires …
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