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 13 of 13 for “"Histogram Analysis"”.
-
A parallel multidimensional weighted histogram analysis method
The Weighted Histogram Analysis Method (WHAM) is a technique used to calculate free energy from molecular simulation data. WHAM recombines biased distributions of samples from multiple Umbrella Sampling simulations to yield an estimate of the global unbiased distribution. The WHAM algorithm …
-
Qualitative Evaluation of Data Compression in Real-time Ultrasound Imaging
… tests using kappa statistics and three way Analysis of Variance (ANOVA) using General Linear Models (GLM). Objective testing were performed using histogram analysis and estimation of peak signal to noise ratios.</p> <p>The kappa scores for all bandwidths greater than 256 kbps indicated good …
-
A Monte Carlo Approach to Studying the Hydrogen Storage Capabilities of Potassium Magnesium Hydride (KMgH3)
… Monte Carlo (GCMC) simulations and the weighted histogram analysis method (WHAM) were employed at selected temperatures and pressures in the study of the hydrogen storage capabilities of KMgH3. A specially tailored addition/removal algorithm was employed to add hydrogen directly at the lattice …
-
Validation of the charge equilibration lipid force field for simulations of phospholipid membranes with an application to the study of the free energetics of methyl guanidinium permeation across a DPPC bilayer
… sampling MD simulations with the Weighted Histogram Analysis Method (WHAM) for unbiasing probabilities, we compute a potential of mean force (PMF) for the reversible trans-fer of methyl guanidinium from bulk solution to bilayer center. Decomposition of the PMF in component contributions …
-
Real-time parameter adjustment for archival image scanning
… was developed. This algorithm relies on histogram analysis over non overlapping image regions for the computation of scan parameters. This thesis describes a hardware realization of the APS algorithm. To achieve a real-time implementation that is low in cost, several compromises were …
-
Unconstrained Road Sign Recognition
… threshold colour segmentation algorithm based on histogram analysis. A dynamic threshold is very important in road sign segmentation, since road sign colours may change throughout the day due to environmental conditions. In the second part, we propose a geometrical shape symmetry detection and …
-
Eye Tracking: A Perceptual Interface for Content Based Image Retrieval
… an eye gaze driven search mechanism. Additional histogram analysis of the fixations, saccades and pupil diameters in the human eye movement data revealed a new method of extracting intentions from gaze behaviour for image search, of which the user was not aware and promises even quicker search …
-
Electronic and solvent effects on monosaccharide conformations
… Mean Force (PMF), umbrella sampling and Weighted Histogram Analysis Methods (WHAM). The PMF calculations were performed in the canonical (NVT) ensemble in the gaseous and aqueous phase where each monosaccharide was modelled with Parameter Model 3 for Carbohydrates (PM3CARB-I). Density Functional …
-
Electronic and solvent effects on monosaccharide conformations
… Mean Force (PMF), umbrella sampling and Weighted Histogram Analysis Methods (WHAM). The PMF calculations were performed in the canonical (NVT) ensemble in the gaseous and aqueous phase where each monosaccharide was modelled with Parameter Model 3 for Carbohydrates (PM3CARB-I). Density Functional …
-
Characterising Heterogeneity of Glioblastoma using Multi-parametric Magnetic Resonance Imaging
… observations were made: I. Using a joint histogram analysis method, habitats with different diffusivity patterns were identified. A non-enhancing sub-region with decreased isotropic diffusion and increased anisotropic diffusion was associated with progression-free survival (PFS, hazard …
-
The analysis of dynamic contrast-enhanced magnetic resonance imaging data: treatment effects, sampling rates and repeatability
This dissertation describes the analysis of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) data, primarily by means of pharmacokinetic models, in order to yield parameters which reflect the physiological properties of tumours. Historically, these analysis procedures have been …
-
Classical And Ab Initio Qm/mm Simulations Of Bacterial Enzymes
<p>This thesis describes analyses performed on three enzyme systems. Chapter 2, 3, and 4 involve studies carried out on the GatCAB enzyme of H. pylori and S. aureus. Since information at the electronic level was not required for these studies, sampling of the configuration space carried out at the …
-
Exploring project complexities and their problems: a critical review of the literature
… in the context of project management. The analysis period is more than 25 years from 1990 to 2015, and covers key developments in project complexity. Then, selected publications have been analysed. Finally three dominant perspectives construct a project complexity framework: the Project …