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Showing 1 to 20 of 625 for “"Rayleigh"”.
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Axisymmetric Rayleigh-Benard convection
This thesis considers axisymmetric Rayleigh-Benard convection in an infinite horizontal layer of fluid heated from below major emphasis is placed on a study of the effect of rotation of the layer, where both the stationary and overstable cases are analysed. In Chapter 2, a numerical solution of the …
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Reliable communication over Rayleigh fading channels
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Rayleigh wave scattering across step discontinuities
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1980.
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On the Rayleigh -Brillouin scattering in air
… lidar system that can directly measure the Rayleigh-Brillouin scattering (RBS) spectra, from which the wind, temperature, and turbulence in the troposphere can be measured. Its transmitter is a double-frequency Nd-YAG laser at 532nm. Most of the data used in this research were taken on 31 …
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Lagrangian dynamics of turbulent Rayleigh-Benard convection
U of I Only Restriction Lifted for Item 112217 on 2021-08-24T09:15:10Z.
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Active Transport in Chaotic Rayleigh-Bénard Convection
… by a spatiotemporally chaotic state of Rayleigh-Be?nard convection. A nonlinear Fischer-Kolmogorov-Petrovskii-Piskunov reaction is selected to study the transport within these flows. A highly efficient, parallel spectral element approach is employed to solve the Boussinesq and the …
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Rss Based Localization In A Rayleigh Fading Environment
… are known. Further, we assume fading is Rayleigh and that the propagation constant is constant but unknown. Also, we assume that modulation is spread spectrum and that either the sensors or agents are capable of resolving multipath components down to the chip level and are capable of …
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Rayleigh-Taylor mixing: confinement by stratification and geometry
Rayleigh-Taylor instability has been an area of active research in fluid dynamics for the last twenty years, but relatively little attention has been paid to the dynamics of problems where Rayleigh-Taylor instability plays a role, but is only one component of a more complex system. Here, …
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The Spatial Structure of Turbulent Rayleigh-Benard Convection
… the cellular structures commonly observed at low Rayleigh numbers. The circulation cells are proposed as a physical description (not an explanation) of the phenomenon referred to in the literature as the wind of turbulence. They were found to contain approximately 40% of the total kinetic energy, …
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Quantifying Spatio-Temporal Chaos in Rayleigh Bénard Convection
In this project Rayleigh Bénard convection (RBC) in a cylindrical domain with experimentally realistic boundaries was investigated numerically. The results were obtained using large-scale parallel calculations. The flow field was determined as well as its linearized solutions in order to obtain …
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Wavelet Modulation in Gaussian and Rayleigh Fading Channels
Wavelet Modulation (WM)---also referred to as fractal modulation---simultaneously sends data at multiple rates through an unknown channel. This novel multirate diversity strategy offers improved message recovery over conventional modulation techniques: if the message is not received at one rate due …
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Non-Rayleigh scattering by a randomly oriented elongated scatterer
… false alarm (PFA) are shown to be strongly non-Rayleigh and a strong function of shape of scatterer. The tails are shown to increase above that associated with a Rayleigh distribution with increasing degree of elongation (aspect ratio) of the scatterer and when roughness effects are introduced. …
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Hyper-Rayleigh scattering measurements of hyperpolarizabilities for tetrahedral molecules
… methane, and methane have been measured by hyper-Rayleigh scattering in gas and liquid phases. The gas-phase results for the coefficient beta xyz (atomic units) are 11.0 +/- 0.9 (CC14), 5.4 +/- 0.4 (CF4), 7.0 +/- 0.6 (CD4), 7.1 +/- 0.7 (CH4). Ab initio calculations are consistent with the measured …
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Weighted Generalization of Rayleigh and Related Class of Distributions
<p>Weighted distributions occur naturally and frequently in research related to reliability, bio-medicine, ecology and in the modeling of clustered sample, heterogeneity, and extraneous variation. In the analysis of intervention data, the expected value of the duration to completion of a random …
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Stabilization of the Rayleigh-Taylor Instability With Magnetic Feedback
Made available in DSpace on 2014-12-08T22:24:45Z (GMT). No. of bitstreams: 1 7001022.pdf: 2821820 bytes, checksum: eb1554f14d3f49da61e8ab4ae7587aef (MD5) Previous issue date: 1969
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Rayleigh-Taylor-Induced electromagnetic fields in laser-produced plasmas
… to infer path-integrated field strengths. Rayleigh-Taylor (RT) growth of preimposed surface perturbations generated magnetic fields by the RT-induced Biermann battery and were measured for the first time. Good data were obtained during linear growth and when compared to ideal calculations, …
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Non-Rayleigh scattering by a randomly oriented elongated scatterer
… false alarm (PFA) are shown to be strongly non-Rayleigh and a strong function of shape of scatterer. The tails are shown to increase above that associated with a Rayleigh distribution with increasing degree of elongation (aspect ratio) of the scatterer and when roughness effects are introduced. …
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Distributed Vibration Sensing using Rayleigh Backscatter in Optical Fibers
… distributed vibration measurements using the Rayleigh scatter along a single-mode optical fiber. The effort begins by discussing various distributed measurement techniques currently in use before discussing the OFDR technique. Next, a thorough discussion on how high spatially resolved Rayleigh …
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Unbiased Filtered Rayleigh Scattering Measurement Model for Aerodynamic Flows
The filtered Rayleigh scattering (FRS) optical diagnostic has become an attractive technique for advanced aerodynamic measurements. The appeal of FRS is that it can simultaneously quantify density, temperature, and vector velocity. Additionally, it is entirely non-intrusive to the flow since the …
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