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.
Results
Showing 1 to 9 of 9 for “"wave train"”.
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Three-dimensional pulsed disturbances in a plane mixing layer.
… modulation of a spanwise uniform time-harmonic wave train which provides a clear phase reference for the phase-locked velocity measurements. The evolution of the pulsed disturbance depends critically on the time delay between the modulation pulse and the carrier wave train, the plane mixing …
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Eurasian Snow Cover and the Role of Linear Interference in Stratosphere-troposphere Interactions
… snow forcing, a vertically propagating Rossby wave train is generated, driving dynamical stratospheric warming and a negative NAM response that couples to the troposphere. It is shown that unexplained aspects of the evolution of this response can be clarified by examining the time evolution of …
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Phenomena in the propagation of ultrasonic vibrations in nickel wire
A wave-train-echo technique, with repeated forward-and-return travels of the signal, was used to study the propagation of ultrasonic waves in nickel wire. In particular, the origin of often observed anomalous waves in nickel wire was investigated. A possible explanation of an aspect of the …
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Subseasonal to seasonal prediction and predictability of extreme and severe weather
… Europe blocks are influenced by a traveling wave across the Atlantic Ocean and develops rapidly, mainly attributed to strong anticyclonic Rossby wave breaking. Asian blocks are fixated within a stationary wave train that spans upstream to the western Atlantic Ocean and contains strong low- …
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Seismic structure beneath Southeast Asia from adjoint waveform tomography
… do not fully account for the true physics of wave propagation. Recent computational advances allow us to embrace the full complexity of seismic wave propagation by accurately solving the 3-D seismic wave equation numerically. This can account for effects such as wavefront healing, …
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Wave induced response of sea floor deposits : a simple model for sands and nonlinear analysis by FEM
This dissertation analyzes the ocean wave-induced response of seafloor deposits. The linear wave theory is introduced for determination of the wave-induced pressure at the mud line. The seafloor deposit is assumed to be a saturated porous medium modelled by a two-phase system. The theory of mixture …
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Optically injected dual state quantum dot lasers
… lasers as artificial photonic neurons. Photonic waveguides are not as sensitive to centimetre long transmission lines as electronic circuits. This could be particularly advantageous for neural networks where one element, a neuron, must receive signals from many different other neurons. Having …
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A study of breakwater gap wave diffraction using close range photogrammetry and finite and infinite elements.
In this thesis the diffraction of water waves passing through a gap in a breakwater is investigated experimentally, using close range photogrammetry, and numerically, using finite and infinite elements. The author was particularly interested in validating specific breakwater gap diffraction …
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Ein wellenbasiertes stochastisches Modell zur Vorhersage der Erdbebenlast
Starke Erdbeben stellen weltweit ein hohes Risiko für urbane Zentren dar, dem unter anderem durch Methoden der aseismischen Bauwerksbemessung begegnet wird. Grundlage hierfür bilden Annahmen und Erfahrungswissen über die lokale seismische Bodenbeschleunigung, Grenzen sind hingegen durch die …