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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 12 of 12 for “"symmetry considerations"”.
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Modeling Aspects and Mathematical Analysis of Some Fluid-Elastic Structure Interaction Problems
… domain (possibly reduced to a 2D one, by symmetry considerations) and the elastic structure may be a thick shell (in the stationary case), an elastic plate or a cylindrical membrane (when time dependence is accounted for)
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Compressive failure of notched angle-ply composite laminates: three-dimensional finite element analysis and experiment
… by as much as a factor of ten. In addition, symmetry considerations for three-dimensional finite element modelling of composite laminates are discussed, and a two-dimensional finite element model based on shear-deformable plate theory is predicted.
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The Effective Field Theory Approach to Fluid Dynamics, Modified Gravity Theories, and Cosmology
… systems (in constrast to superfluid), pure from symmetry considerations and EFT principles. The dynamical fields are the Goldstone excitations, associated with spontaneously broken spacetime translations. It is organized as derivatively coupled theory involving multiple scalar fields. This …
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An action principle for dissipative fluid dynamics
… quantities, which are subject to natural symmetry considerations, and the time evolution of the path integral is along the closed-time contour. Our formulation recovers the standard hydrodynamics, including the expected constraints from thermodynamics and the fluctuation-dissipation …
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Tailoring light with photonic crystal slabs : from directional emission to topological half charges
… We show that a quadratic degeneracy formed by symmetry considerations can be split into a pair of Dirac points, which can be further split into four exceptional points. Through calculations of an analytical two-band model and numerical simulations of two-dimensional photonic crystals and …
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Coexistence and Competition of Superconductivity and Magnetism
… and the formation of free energies through symmetry considerations. Following this, phase diagrams are derived for various combinations of representations leading to the presence of helically ordered phases. The dissertation ccncludes by summarising the results obtained and discussing …
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Quantum dynamics in the condensed phase: path integrals, master equations and purity
… purity in the case of relaxation dynamics, where symmetry considerations lead to an entirely different picture. We identify distinct features for ground & excited state initial conditions, and show that in the latter case purity always goes through its minimum, corresponding to a maximally mixed …
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Novel terahertz and nanophotonic lasers : theory, design, and fabrication
… behavior using temporal coupled-mode theory and symmetry considerations. The unique simplicity of this system whereby an ultra-long lifetime delocalized electromagnetic field can exist above the surface and consequently easily interact with added matter, provides exciting new opportunities for …
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Spin liquids : mean field and beyond
… spinon-phonon interactions which is based on a symmetry considerations, and illustrate it for different algebraic spin liquids. Despite all considered algebraic spin liquids have identical low energy description, spinon-phonon interaction probes the microscopic details and is set by …
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Solid-state NMR of low-gamma nuclei and solid-state NMR probe design towards minimization of the perturbation of the applied magnetic field
… of probe materials and geometrical symmetry considerations, optimized to minimize the overall perturbation to the applied magnetic field (B0). The improved spinning module requires only first and second order shimming adjustments to achievea sub-Hertz resolutionof13C resonances …
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Semiclassical theory of collisional relaxation mechanism in microwave transient phenomena
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-04-22T20:19:05Z No. of bitstreams: 1 1975_liu.pdf: 3867108 bytes, checksum: 4c905621f5f62570d4bb71f313f8c4b8 (MD5)
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Designing subwavelength-structured light sources
… (dark Fano resonance) is selected through the symmetry mismatch to the free-space modes. The PCSELs have not only achieved the highest surface-emitting single-mode power but also the ability to control the shapes, polarizations and directions of their far-fields. However, as in all laser …