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 20 of 1535 for “"dissipation"”.
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Tidal Dissipation in Extrasolar Planets
… have been circularized likely due to tidal dissipation inside the planets. These exoplanets share with our own Jupiter at least one trait in common: when they are subject to periodic tidal forcing, they behave like a lossy spring, with a tidal ``quality factor'', Q, of order 10^5. This …
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Dissipation in Skewed Boundary Layers
… is well understood and is characterised by a dissipation coefficient, Cd . However, it is common for the transverse pressure gradients in turbomachines to create highly skewed boundary layers, where the velocity varies in direction as well as magnitude. In this thesis, a combined experimental …
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Nanomechanical systems with small dissipation
… development of methods for controlling energy dissipation in small mechanical systems, specifically nanomechanical resonators with at least one dimension in the deep nanometer range (< 200 nm). We explored three avenues for decreasing intrinsic dissipation and one method for decreasing …
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Laboratory experiments on warm fog dissipation.
… increase the fog intensity, and thus, retard fog dissipation. Conductivity/Resistivity measurements and illustrations of the relative droplet sizes and shapes of the various agents used are also contained in this report. The effects on plants of four of the hygroscopic agents are also discussed …
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Cyclic Plasticity and Structural Energy Dissipation
Made available in DSpace on 2014-12-12T00:25:55Z (GMT). No. of bitstreams: 1 7412152.pdf: 2785519 bytes, checksum: 65ce64d882568d86691ed018f4f8d9b6 (MD5) Previous issue date: 1973
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Heat dissipation from carbon nano-electronics
The incorporation of graphitic compounds such as carbon nanotubes (CNTs) and graphene into nano-electronic device packaging holds much promise for waste heat management given their high thermal conductivities. However, as these graphitic materials must be used in together with other …
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Shockwave energy dissipation by mechanoresponsive materials
… effects. Novel approaches for shockwave energy dissipation (SWED) are demanded since conventional impact absorbing materials do not provide sufficient shockwave attenuation. This research seeks to develop new approaches for efficient SWED in materials designed based on the availability of shock …
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Energy storage and dissipation in polyurea composites
… improved load transmission by utilizing new dissipation and storage pathways due to geometry. Experimentation and computational modeling are used to quantify the dissipatio features of the polyurea composite. This research combines a new polyurea interlayer geometry with steel to improve the …
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Scramjet combustion modeling using eddy dissipation model
… number operation, this works considers the Eddy Dissipation Model (EDM) to describe the combustion process inside an open-access Computational Fluid Dynamics (CFD) solver. Typical CFD modeling approaches for turbulent supersonic reacting flows are associated with a high computational cost. This …
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Nonlinear dissipation in two-dimensional helium films
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-16T13:40:58Z No. of bitstreams: 1 1982_buck.pdf: 4584541 bytes, checksum: 63f3eb8b668e1f21150f950fd563ce67 (MD5)
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Energy storage and dissipation in polyurea composites
… improved load transmission by utilizing new dissipation and storage pathways due to geometry. Experimentation and computational modeling are used to quantify the dissipation features of the polyurea composite. This research combines a new polyurea interlayer geometry with steel to improve the …
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Infragravity waves over topography : generation, dissipation, and reflection
… In addition, it is shown here that the apparent dissipation of infragravity energy observed in the surfzone is the result of nonlinear energy transfers from infragravity waves back to swell and wind waves. The energy transfers are sensitive to the shallow water bottom topography. On nonplanar …
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Mechanical Stiffness and Dissipation in Ultrananocrystalline Diamond Films
… its thermomechanical stability and mechanical dissipation. These results are extremely useful in understanding and controlling the dissipation in nanocrystalline materials.
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Computational modeling of intrinsic dissipation in nano-structure
… we study the different mechanisms of intrinsic dissipation in nano-electro mechanical systems (NEMS). We, first, use molecular dynamics (MD) simulation and gain an understanding of the underlying loss mechanisms. Using insights from the MD simulation, a multi-scale method to model intrinsic …
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Statistical response predictions in complex systems with dissipation
… of modal decay rates and the effect of dissipation on the intermodal correlations of natural frequency spectra are explored. It is found that for moderate damping the modal decay rates of complex systems are distributed according to a modified chi square distribution whose degree depends …
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Tomographic PIV measurement of coherent dissipation scale structures
… used to assess the dynamics and topology of the dissipation scale structures. In support of previous investigations similar topology, strain rate alignment, scale-invariance, and clustering behaviours are demonstrated. Correlated high enstrophy and dissipation regions occur in the periphery of …
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Predictive models for power dissipation in optical transceivers
Power dissipation in optical networks is a significant problem for the telecommunications industry. The optical transceiver was selected as a representative device of the network, and a component based power model is developed for it. This model indicates that there are three key power dissipating …
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Infragravity waves over topography: generation, dissipation, and reflection
… In addition, it is shown here that the apparent dissipation of infragravity energy observed in the surfzone is the result of nonlinear energy transfers from infragravity waves back to swell and wind waves. The energy transfers are sensitive to the shallow water bottom topography. On nonplanar …
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