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 15 of 15 for “"Scattering effect"”.
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The effects of pneumatically propelled abrasives in removing a finish on open and closed grained woods
… throughout the blasting operation. Due to the scattering and collision effect one cannot achieve an infinitely small and/or perfectly uniform angle between the nozzle opening and the test panel. 2. The nozzle opening should be as flat as possible. The distance between the nozzle opening and the …
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NIR light transmission through skin and muscle
… through tissue. In this range, absorption and scattering effects are relatively lower when compared to the visible or middle infrared wavelengths. Knowledge of the transmittance through tissue can help determine the effective light intensities in medical applications. The objective of this …
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Monte Carlo study of current variability in UTB SOI DG MOSFETs
… into the nanometer regime due to short channel effects, tunneling and subthreshold leakage current. Ultra-thin body silicon-on-insulator based architectures offer a promising alternative, alleviating these problems through their geometry. However, the transport behaviour in these devices is more …
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Electromagnetic Scattering From a Strongly Turbulent Medium
… When the fluctuation is weak, the single scattering theory is widely used and found to be satisfactory; however, as many practical situations are known to exist, if fluctuations are strong, the multiple scattering effect must be taken into account. In this report, two theoretical models of …
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Ultrasonic propagation in cancellous bone
… the longitudinal ultrasonic velocity, the scattering effect and the attenuation as a function of frequency were measured on a range of cancellous bone samples, from healthy to severely osteoporotic, and also a few cortical samples. The cancellous bone was human os calces and vertebrae. The …
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Raman amplification and performance altering effects
… into several applications of the Raman scattering effect in communication optical fibres as well as how some of these applications can be modified to enhance the resulting performance. The majority of the work contained within is based on laboratory results using many commercially …
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Effects of internal waves on low frequency, long range, acoustic propagation in the deep ocean
… the local ray path will contribute to acoustic scattering: This effect leads to an important filtering of the acoustic spectra relative to the internal-wave spectra. We believe that this is the first observational evidence for the acoustic ray and internal wave resonance. Finally, the thesis …
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A physical model to estimate snowfall over land using microwave measurements
… frozen hydrometeors is significant. However, the scattering effect of snowfall in the atmosphere at those higher frequencies is also impacted by water vapor and supercooled water in the upper atmosphere.The Discrete Dipole Approximation (DDA) method was employed to generate the single scattering …
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Laboratory and field trials evaluation of transmit delay Diversity applied to DVB-T/H networks
… essential that such networks are designed cost-effectively and with minimized environmental impact. The use of transmit diversity techniques with multiple antennas have long been proposed to improve the performance and capacity of wireless systems. Transmit diversity exploits the scattering …
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Acoustic scattering analysis for remote sensing of manganese nodules
The theory of the scattering of plane waves in a fluid medium by an isotropic elastic sphere representing a manganese nodule is developed. Scattering cross sections were computed using the theory and the results are presented graphically. The scattering cross section and the reflectivity factor …
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Investigation of defects on acoustic scattering in cloak by molding process
… to the understanding of the broken symmetric effects of an acoustic metamaterial.
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Transport and relaxation properties in anisotropic superconductors
… temperatures if resonant non-magnetic impurity scattering effect is included self-consistently in the calculations. The magnetic field effect on T1 is also studied, and we found that for high enough fields a new process, the pair creation process, will dominate the relaxation which results in a …
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Piled foundation dynamics: Considering inertial and underground railway excitation
… the boundary-element method (BEM) to study the effects due to wave scattering in inertially excited pile-groups. When different inertial loads are applied, the converged solutions of the iterative BEM model strongly agree with the interaction factors predicted using a conventional BEM model. A …
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Impact of wave-filament scattering in the scrape-off layer during lower hybrid current drive
… and simulations (which do not account for scattering). This thesis investigates the impact of scattering processes on LHCD, and attempts to bridge this discrepancy. Two novel scattering models are developed. The \emph{filament-refraction} model generalizes beyond the weak turbulence …
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Applications of High Speed Configurable Logic Devices in Modern Particle Physics Experiments
… residual plot taking into account the multiple scattering effect.