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 5 of 5 for “"Far-field approximation"”.
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Fast algorithms for solving integral equations of electromagnetic wave scattering
… $N\sp{1.5}$ and to N (log(N) $\sp2.$ (2) A fast far-field approximation (FAFFA) method, which solves surface integral equations iteratively with computational complexity of O($N\sp{4/3}$) for one matrix vector multiplication. The FAFFA is applied to compute the RCSs of 2D and 3D objects with …
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Particle shape corrections to Twersky's formalism for multiple scattering in a random particulate medium
… Most applications of Twersky’s work use a far-field approximation and a point-particle assumption. At high frequencies, particle sizes may be large relative to a wavelength; therefore, the point-particle assumption is inaccurate. Under a low-density approximation, this thesis introduces a …
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The electronic structure of the pair-density-wave (PDW) superconductor in the cuprates
… in the absence of any external magnetic field, particularly in the cuprate superconductors. A crucial feature of the PDW state that reconciles certain aspects of the cuprates phenomenology is that inherently it has a charge-density-wave (CDW) as a composite order parameter associated with …
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Flows inside cells: From natural cytoplasmic streaming to microfluidic systems
… show that the leading-order instantaneous flow field during one scan of the laser results purely from the thermal expansion of the fluid. In contrast, the average velocity of a tracer particle over a full scan arises from the interplay between thermal expansion and thermal shear viscosity …
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A Computational Framework for Dimensionally Reduced Particle Dynamics in Magnetic Nozzle Fields: An Adiabatic Invariant Approach
… charged particle trajectories in electromagnetic fields representative of magnetic nozzle expansion regions. By employing Julia’s DifferentialEquations.jl and Python’s scientific libraries, particle trajectories are integrated with high precision (achieving relative and absolute error tolerances …