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 11 of 11 for “"boundary interactions"”.
-
Designing boundary interactions for simple mobile robots
… a general approach to modeling and planning over interactions between a robot and boundaries of its environment, and presents prototypes or simulations of such systems for solving high-level tasks such as object manipulation. One major contribution of this thesis is the derivation of necessary and …
-
Continuous and quad-graph integrable models with a boundary: Reflection maps and 3D-boundary consistency
This thesis is focusing on boundary problems for various classical integrable schemes. First, we consider the vector nonlinear Schrodinger (NLS) equation on the halfline. Using a Backlund transformation method which explores the folding symmetry of the system, classes of integrable boundary …
-
Quasi-four-dimensional characterization of dislocation interactions in FCC and HCP systems
Dislocation/grain boundary and dislocation/dislocation interactions have been investigated in austenitic stainless steel and α-Ti systems using in situ deformation in a transmission electron microscope, diffraction contrast electron tomography for three-dimensional analysis, and electron …
-
Modal analysis of vertical array receptions for the Heard Island Feasibility Test
… all but the lowest modes would be attenuated by boundary interactions along the path. Results from independent analyses of the same data also support the conclusion that the signal structure is quite complex.
-
Spectroscopic surface scattering of confined acoustic phonons in silicon nanostructures
… may exist large gaps in understanding phonon interactions with rough surfaces, especially when the roughness dimensions are comparable to phonon wavelengths. To consider such refinements, this thesis focuses on spectroscopic measurements of specularity in silicon nanostructures with …
-
Phase Field Modeling of Grain Growth in Porous Polycrystalline Solids
… Theoretical models for the pore-grain boundary interactions during grain growth usually employ restrictive, unrealistic assumptions on the pore and grain shapes and motions to render the problem tractable. However, these assumptions limit the models to be only of qualitative nature and …
-
An advanced perspective on twin growth in nickel-titanium
… In addition, energetics of dislocation twin boundary interactions in a face centered cubic (fcc) metal (Copper) that contributes to strengthening is investigated. Density Functional Theory based ab initio calculation and Molecular dynamics (MD) correspond to the right length and time scale …
-
The Role of Twinning in the Plastic Deformation of Alpha Phase Titanium
… Ti–6Al–4V by {10$\overline 1$2} twinning. Grain boundary interactions between various deformation twinning types and alpha phase grain boundaries in commercial purity titanium and Ti–6Al–4V are reported and analysed. In commercial purity titanium {10$\overline 1$2} as well as other deformation …
-
Modeling of Polar Cap Ionospheric Patches and Attendant Plasma Instabilities: Initialization from Data and Parametric Analysis
… of direct plasma patch -- simulation grid boundary interactions that are often the result of the need to use smaller grid volumes due to computing resource limitations,</li> <li>Model a range of notional polar cap patches for parametric analysis of patch dynamics at relatively high spatial …
-
Impacts of short-time scale water column variability on broadband high-frequency acoustic wave propagation
… ray tracing numerical model using a sea surface boundary generated from measured water wave spectra at the time of signal propagation. It is determined that on a time scale of seconds, corresponding to typical periods of surface water waves, the arrival time of reflected acoustic signals from …
-
Interactions of Cellulose Nanocrystals in Colloidal and Composite Systems
… crystalline structure, but crucially on the interactions between particles. These interactions are well-known, yet a complete understanding to enable the full exploitation of the properties attainable in CNC-based materials is lacking. The principal emphasis of this dissertation lies in …