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 34 for “"Orientation angle"”.
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The effects of orientation angle, subcooling, heat flux, mass flux, and pressure on bubble growth and detachment in subcooled flow boiling
The effects of orientation angle, subcooling, heat flux, mass flux, and pressure on bubble growth and detachment in subcooled flow boiling were studied using a high-speed video camera in conjunction with a two-phase flow loop that can accommodate a wide range of flow conditions. Specifically, …
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The response of a structural target to oblique fragment and blast loading
… plate. The velocity of the ball bearing and the orientation angle of the target plate was varied. A numerical study was undertaken to further study oblique impact of a ball bearing on a Domex 700 target plate and to investigate experimental uncertainty. Blast experiments were carried out using a …
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Finite Element Modeling of Tow-Placed Variable-Stiffness Composite Laminates
… included in this model. Additionally, the fiber-orientation angle throughout the panel was based on individual fiber path definitions and not tow path definitions. In this thesis, a method of creating a finite element model of tow-placed variable-stiffness composite panels is presented. This …
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Supramolecular Architectures in Molecular Medicine: Visualizing and Manipulating the Structure of Protein-Lipid Surfaces
… linear dichroism on the distribution of protein orientation angle has revealed a constrained degenerate solution, which has impact on all attempts to describe protein orientation with this technique.
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Wire detection using ground penetrating radar using image processing techniques
… features extracted for wire detection include orientation, strength, and relative strength. The second and third approaches propose an ellipse fitting technique to detect surface-laid and shallowly buried wires. After filtering and edge detection in the cross-section image, ellipse fitting is …
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Quantitative anisotropy imaging with polarized interference microscopy
… information. To extract the retardance and the orientation angle maps from a single-shot measurement, we have further developed a mathematical model for QPIM. Our QPIM system has been validated by measuring a calibrated quarterwave plate, whose fast-axis orientation angle and retardance were …
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Experimental Investigation of Liquid and Gas Fueled Flames Towards the Development of a Burning Rate Emulator (BRE) for Microgravity Applications
… burning on flat plates was studied at various orientations with respect to gravity. Flat wicks were saturated with methanol or ethanol. Steady flames were obtained, and ranged from boundary layer flames to plume-type burning. Maximum burning rate per unit area was recorded at an upward …
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Experimental Analysis of Parameters Influencing the Bone Burring Process
… also provided flexibility in tool depth/orientation angle relative to the bone without sacrificing optimal process outcomes.
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High Frequency Radio Wave Transionospheric Propagation Polarization Studies from the RRI-SuperDARN Experiment
… measures the polarization information (such as orientation angle and ellipticity angle) of the wave. Radio waves were transmitted from the Saskatoon SuperDARN (Super Dual Auroral Radar Network) radar in conjunction with RRI flybys. There have been 88 conjunctions between RRI and SuperDARN over 4 …
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Characterising the deformation behaviour of human tooth enamel at the microscale
… crystals) of enamel. The effective crystal orientation angle was found to be between 44o and 48o for indentation depths from 0.8 and 2.4 μm below according to the analytical model. The range of angles facilitated the shear sliding of mineral crystals and reduced the stress level as well as …
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Orientation dependence of the acoustic backscatter for elongated zooplankton
… the backscatter cross section as a function of orientation angle is derived. A directivity pattern is determined from the analytic formula and the width of the main lobe (beam width) is computed. The relationship between beamwidth and acoustic frequency is presented in plots of beamwidth versus …
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Adsorption of molecular layers on hydrophilic SiOxNy probed by DPI technique
… with the previous study in terms of average orientation angle and thickness of the monolayer deposited (56.5° and 1.44 nm respectively). We also studied adsorbed water layers on the hydrophilic surface, and found that our setup allows to desorb only about 10% of the layers since those are …
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Design Optimization Procedure for Monocoque Composite Cylinder Structures Using Response Surface Techniques
… laminates consisting of two independent fiber orientation angles. The second approach increases the design space to include those that are bordered by those in the first approach. The third and fourth approaches utilize stacking sequence designs for optimization, with continuous and discrete …
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Friction stir processing for superplasticity and other applications
… by the process and the high grain boundary mis-orientation angle, it has been found that friction stir processing is capable of creating high strain rate superplasticity in aluminum alloys. This study evaluates the technology of friction stir processing. In detail, the study examines the …
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Characterisation and modelling of spinal facet joints
… determine the facet articular radius and facet orientation angle using an improved method based on micro-computed tomography scan images. Subsequently, the biomechanical properties of the cartilage in the ovine facet joint were characterised using a combination of experimental and computational …
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Analyzing Vibration in Omni-Wheels: A Design of Experiments Approach to Optimizing Omni-Wheel Selection
… type, rotational speed, applied load, and wheel orientation angle. Individual regression models were developed for each of six wheel types, treating operational parameters as continuous variables. Vibration levels were measured using root mean square (RMS) acceleration, derived from Fast Fourier …
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The Cluster and Large Scale Environments of Quasars at z < 0.9.
… and the 3D separations have been found and the orientation of the quasar with respect to the major axis of the closest cluster calculated, introducing new information to previous work. The positions of quasars with respect to clusters of galaxies will give an indication of the large scale …
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Automatic prediction of solar flares and super geomagnetic storms
… to predict flare occurrences; (4) The magnetic orientation angle [theta], determined from a potential field model, is proved to be able to predict the probability of super geomagnetic storms (Dst <= -200nT). The results show that those active regions associated with |[theta]| < 90 are more …
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Investigation of downward facing critical heat flux with water-based nanofluids for In-Vessel Retention applications
… similarity to the AP 1000 and allows for all angles that represent the bottom surface of the reactor vessel. Research completed herein measured CHF for varied conditions of orientation angle, pressure, mass flux, fluid type, and surface material. Results for stainless steel with water based …
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Effective Thermal Properties of Granular Porous Media: A Numerical Study using Lattice Blotzmann Methods
… heat flux deviations especially when the grain orientation angle changes. External compressive pressures cause elastic deformation of the grain surface and enhance the thermal conductivity of grains with lower Young’s modulus. Introducing partial saturation of water and air in the pore space …
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