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 7 of 7 for “"coupled waves"”.
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On the paradox of convectively-coupled waves
This thesis investigates the forced response of waves on a linearized, shallow water beta-plane in an attempt to develop some gross understanding of the properties of convectively coupled waves. Two concepts are central to this new theory: (i) a convectively coupled wave is a forced wave; (ii) a …
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Dynamics of Ocean Waves in a Continuous Sea Ice Cover
Waves and swell incident on a continuous cover of sea ice can become coupled to the ice and propagate as flexural-gravity waves. These ice-coupled waves are determined by a dispersion equation and attenuation coefficient which depend critically on the material properties of the sea ice. Two models …
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Travelling waves modulated by resonant currents in laterally-inhibited grids of leaky integrate-and-fire neurons
Travelling waves of neural activity are a biologically salient and analytically tractable dynamic of networks of neurons. They have been observed experimentally across the whole brain as well as at smaller scales, linked to functions as diverse as visual processing, motor coordination, and …
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Active/Passive control of fluid-borne and structure-borne disturbances in fluid-filled piping systems
… flow are derived only for the n=0 and n=1 shell waves and n=0 fluid wave. Higher order waves have cut-on frequencies and were not analyzed. Current sensing methodologies are limited to the analysis of wave types separately. A new approach of wave decomposition using multiple sensors is developed …
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Finite temperature effects in free-electron-lasers
… in the real parts of the wave-numbers of the coupled waves and consequently a decrease in the gain. The spectrum broadens and the central emission frequency decreases with temperature. A boundary-value problem is formulated and numerically solved in order to study how temperature affects the …
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Elastic Waves Along a Fracture Intersection
… rock mass. In this dissertation two new types of coupled waves are examined that propagate along intersections. 1) A coupled wedge wave that propagates along a surface fracture with particle motion highly localized to the intersection of a fracture with a free surface, and 2) fracture intersection …
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Surface Acoustic Waves Propagation and Coupling Fields in Piezomagnetic and Piezoelectric Semiconductor Layered Structures
… research on multi-field coupling behaviors and waves modulation of PSs has become one of the hot topics. By integrating multiferroic materials with PSs, new magnetically regulated composite devices such as magnetically induced piezoelectric potential transistors, magnetically driven …