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 9 of 9 for “"Wave transport"”.
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Standard and Anomalous Wave Transport Inside Random Media
<p>This thesis is a study of wave transport inside random media using random matrix theory. Anderson localization plays a central role in wave transport in random media. As a consequence of destructive interference in multiple scattering, the wave function decays exponentially inside random …
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Charge-Density-Wave Transport in Quasi - One-Dimensional Conductors
… experimental study of the remarkable collective-transport properties of charge-density-wave (CDW) conductors is presented. Measurements of current oscillations observed in response to applied dc voltages and of mode-locking phenomena observed in response to combined ac and dc voltages indicate a …
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Wave transport in parity-time symmetric, time-varying, and quasi-periodic systems
… platforms have been enabling many exotic wave-matter interaction phenomena unavailable in nature. In this context, I investigated a series of wave transport and scattering phenomena in parity-time symmetric, time-varying and quasi periodic systems in this dissertation. First, I proposed a …
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Characterization of wave transport in non-conservative media with random and correlated disorder
… random media exhibit one of the three regimes of transport - ballistic, diffusive, or Anderson localization - depending on system size. The ballistic and diffusion approximations assumes particle transport, whereas Anderson Localization occurs when wave self-interference effects are dominant. When …
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Drift modelling of marine mammal carcases in coastal waters
… governed by its buoyancy, shape, and the wind, waves and currents it experiences. Here, I develop a drift modelling framework for marine mammal carcases in coastal waters. The resulting models were run forwards and backwards in time to provide insights into strategies for environmental …
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Reciprocity and Normality in the Scattering Matrix of Disordered Media
… provides a practical characterization of wave transport in linear, source-free systems by relating a set of operationally defined input and output spatial channels. The matrix is structured as a block operator, with diagonal blocks encoding same-side reflection matrices (RMs) and …
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1D-to-3D transition of photon heat conduction in polyethylene using molecular dynamics simulations
… we examine the underlying phonon (lattice wave) transport using molecular dynamics simulations. We first show that the thermal conductivity of individual polyethylene chains is high, and can actually diverge (approach infinity) in some cases. We then discuss how the high thermal …
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Control signal transmission through power supply cables of a 3-phase PWM motor
… was carefully measured and analyzed for its wave transport characteristics. The results lead us to select an RF modulation approach in which we modulate the data signals to 900MHz. The data signals are injected and extracted from the power conductors using feed-through capacitors and …
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Gravity Wave and Turbulence Transport in the Mesopause Region
<p>Vertical transport due to dissipating gravity waves and turbulence in the mesopause region (85-100 km) are analyzed with observational data obtained from a narrow-band sodium wind/temperature lidar located at Andes Lidar Observatory (ALO), Cerro Pach´on (30.25 S, 70.73 W), Chile. The Na lidar at …