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 26 for “"Two-point correlation"”.
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The Two Point Correlation Structure of a Cylinder Wake
… study the complete four dimensional space time correlation function was measured in the wake of an untripped circular cylinder at a Reynolds number of 60 000. This correlation serves as the complete inflow boundary condition for an open rotor ingesting inhomogeneous turbulence. An important …
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Theory of two point correlation function in a Vlasov plasma
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1981.
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The characterization of seismic earth structures and numerical mantle convection experiments using two-point correlation functions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1995.
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Metallicity correlations in galaxies
… both the local and high-redshift Universe. The two-point correlation function is a useful tool for extracting information from the 2D metallicity maps that integral field spectroscopy produces. Using the current integrated field unit observations and simulations, this thesis tries to gradually …
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Metallicity correlations in galaxies
… both the local and high-redshift Universe. The two-point correlation function is a useful tool for extracting information from the 2D metallicity maps that integral field spectroscopy produces. Using the current integrated field unit observations and simulations, this thesis tries to gradually …
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Experimental and numerical studies of flows over forward facing steps in pressure gradients
… of the FFS. Proper orthogonal decomposition and two-point correlation were applied to the experimental data to study the large scale structures. For the numerical analysis, turbulence models in ANSYS Fluent were used to study the reattachment length XL for blockage ratios from 5.8% to 29.5% and …
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Scaling and Pattern Formation in Condensed Matter Systems
… a liquid and reproduce the correct form of the two-point correlation functions. Finally, I extend the PFC model to describing binary systems. The resulting theory describes both atomic hopping events on microscopic scales and diffusion on macroscopic scales. It also reproduces the activated …
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Point Process Modelling of Objects in the Star Formation Complexes of the M33 Galaxy
In this thesis, Gibbs point process (GPP) models are constructed to study the spatial distribution of objects in the star formation complexes of the M33 galaxy. The GPP models circumvent the limitations of the two-point correlation function employed in the current astronomy literature by naturally …
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Stellar phase-space clustering in dwarf spheroidal galaxies
… we look at clustering of stars in phase-space in two dwarf spheroidal galaxies: Fornax and Sculptor. We use a novel measurement based on the particle phase space density, P2SAD, as a 2D extension of the two point correlation function, averaged with a number count within a volume in phase-space. …
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Characterizing the Movement of Contaminant Liquid Metal Particles when subject to Electric Pulses, within the Context of Z-pinch Fusion Reactors
… algorithms with connected-component labeling and two-point correlation functions to monitor ejecta trajectories. Results reveal an average ejected particle velocity of 2.54 m/s (±3.58 m/s), with particle formation likelihood peaking at velocities around 1.14 m/s. These findings indicate that …
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Prediction of Trailing Edge Noise from Two-Point Velocity Correlations
… a turbulent channel flow by Moser et al. (1998). Two-point velocity and vorticity statistics of this data set were obtained by averaging 41 instantaneous fields. For comparisons purposes, experimental boundary layer data by Adrian et al. (2000) was chosen. Statistical reduction of 50 velocity …
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A Study of Equivalence of SUSY Theories using Adinkras and Super Virasoro Algebras
… supersymmetric particles interacting. By using two methods, Adinkras and Super Virasoro algebras (SVAs), more information is gained about SUSY theories: (a.) when two representation may be considered equivalent, that is, describing the same physics, and (b.) the derivation of OPE's that do not …
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Methodology for Determining the Variance of the Taylor Factor: Application in Fe-3%Si
… opacity, since it depends only upon the 2-point pair correlation functions. The connection between the variance of the R-value and variance of the Taylor factor is considered. Although only a weak connection was found, it was observed that relatively small variations in the Taylor factor …
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Moments of parton distribution amplitudes and structure functions for the light mesons from lattice QCD
… renormalisation for the determination of two hadronic structure quantities. These are the parton distribution amplitudes (PDAs) which enter in the form-factor for exclusive scattering processes and the parton distribution functions (pdfs) that appear in inclusive processes. The PDA’s …
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Galaxy evolution, cosmology and HPC : clustering studies applied to astronomy
… be used in other fields for data mining. The Two-point Correlation Function (TPCF), in particular, is used to characterize the distribution of matter and objects such as galaxies in the Universe. However, it's computational time will be restrictively slow given the significant increase in the …
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Monte Carlo and Series Expansion Studies of the Anisotropic Driven Ising Lattice Gas Phase Diagram
… diagram can be predicted by investigating the two-point correlation function to first order in a high temperature series expansion. However, the series expansion fails to predict even qualitatively the α-dependence of the critical temperature.
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The fractional quantum Hall regime in graphene
… smaller than one. Then, by the application of two mapping rules, one is able to obtain these properties for fractional quantum Hall states at arbitrary fillings, by conceiving the quantum Hall ferromagnets as vacua on which correlated electrons or correlated holes are added. The predicted …
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Experimental study of turbulent boundary layer flows over forward facing steps with different surface conditions.
… A reference smooth acrylic step and two rough steps created using sandpaper 24-grits and 36-grits. Reynolds numbers based on step height and centerline mean velocities of 1200, 3600 and 4800 were employed. The results show that the mean reattachment length increases as Reynolds number …
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Structure Function Relation of Porous 2D Material via SGCMC Simulation and Statistical Models
… modeling to predict the strength of a two-dimensional porous material without running the simulation. We generate samples by randomly placing circular pores with radii drawn from a log-normal distribution until we reach the target porosity and run our SGCMC simulations on the generated …
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Understanding Unsteady Corner Separation Within Wing-Body Junction Flows
… the flow particularly the horseshoe vortex, its two bistable states, as well the location of the corner separation. These flow features were also characterized using time-averaged flow statistics. Analysis of the instantaneous flow highlighted the unsteadiness of the corner separation i.e., the …
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