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 11 of 11 for “"high frequency regime"”.
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Chaos effects in one-dimensional hydrogen, including the high frequency regime
The system of highly excited hydrogen in combined strong ac and de electric fields is examined. It is shown that the production and maintainence of effectively one-dimensional states is plausible in this system. The threshold of global classical chaos is calculated using the resonance overlap …
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Chaos effects in one-dimensional hydrogen, including the high-frequency regime
The system of highly excited hydrogen in combined strong ac and dc electric fields is examined. It is shown that the production and maintainence of effectively one-dimensional states is plausible in this system. The threshold of global classical chaos is calculated using the resonance overlap …
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Fast methods for inverse wave scattering problems
… inverse wave scattering problems in the low- and high-frequency regime or with weak scatterers. However, inverse wave scattering problems in the resonance regime with strong scatterers still pose many challenges. This thesis proposes algorithms for inverse wave scattering problems in the resonance …
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Stability of charged rotating black holes for linear scalar perturbations
… can be dealt with individually. Trapping is a high frequency obstruction to the proof whereas superradiance occurs at both high and low frequencies. The construction of energy currents for superradiant frequencies gives rise to an unfavourable boundary term. In the high frequency regime, this …
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Fracture characterization from seismic measurements in a borehole
… the tubewave measurements made in the transition regime from low to high frequency can constrain fracture compliance, aperture and length, while measurements made in the high-frequency regime can place a lower bound on fracture compliance. Analysis of field data suggest a large compliance value …
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The Testing and Verification of a Nanomembrane Based Pressure Sensor for Small-Scale Underwater Pressure Measurements
… disturbances in underwater environments. A highly sensitive MEMS pressure sensor has been developed that can be packaged in two different ways – one in a cylindrical housing, and the other in a flexible, yet robust, strip configuration – enabling more freedom for the user to choose an option …
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Surfaces and interfaces characterization for the development of diamond power electronic devices
… of humanity with increasing energy demands. High power elements in the electric grid such as rectifiers are currently based on silicon. Design of new architectures has kept silicon-based devices on top of the high-power devices market. However, the inherent limitations of silicon have lead …
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Consistency of nonparametric Bayesian methods for two statistical inverse problems arising from partial differential equations
… parameter. The results are given in the high-frequency regime, where the diffusion is observed to a later time horizon and at ever closer intervals, but in fact the minimax rate (again up to logarithmic factors) is also attained in the low-frequency regime, where the intervals between …
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Ferroelectric System Dynamics and the Properties of Ferroelectric / Two-Dimensional Electron Gas Heterostructures: a Ginzburg–Landau Study
… as a function of both field amplitude and field frequency. The relationship between the latter and hysteresis loop area, i.e., hysteresis dispersion, is calculated. Previous work established that the model under consideration produces experimentally expected hysteresis dispersion in the …
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Electrokinetics in the Earth
… of rocks and minerals. In this thesis study of frequency-dependent electrokinetics is presented with both theoretical development and experimental verification. The complex (real and imaginary) streaming potential coupling coefficient is explained. This is followed by the first experiments to …
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Approximation of wave packets on the whole real line
… These estimates are extremely accurate in the high frequency regime. The results within these chapters allow us to compare the speed of convergence of the expansion coefficients to determine which orthonormal system would be more suitable in a spectral method to solve TDSE. Our criteria …