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 16 of 16 for “"Noise Characterization"”.
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Noise characterization and exposure at a ski resort
This study examined the noise exposures of employees at a ski resort working in the job categories of snowmaker, snow groomer, or chair lift operator. Noise exposures for all employees were obtained using personal noise dosimetry. Snowmakers were monitored during their normal 12-hour work shifts …
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Inductive noise characterization and mitigation techniques for modern computer systems
… of processor power delivery and voltage noise become increasingly difficult to address. This thesis characterizes voltage emergencies and evaluates voltage noise mitigation techniques across a range of processors and power distribution networks. Each processor class has unique design …
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Phase Noise Characterization of a Mode-Locked Quantum-Dot Coherent Optical Frequency Comb Source Laser
… spectrum. This coherence implies that the phase noise exhibited by each comb line in the OFC is related which allows for effective methods of phase noise compensation. Consequently, OFCs are heavily under research and development. In this research, a prototype 25 GHz quantum-dot coherent optical …
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Microphone suppression of air-noise on geophones
Air-noise in seismic records creates a loss in signal quality, reducing seismic image clarity. A microphone may be used to estimate and remove air-noise in seismic records. This thesis covers the characterization of air-noise on a prototype 4-Component geophone (3-C geophone plus microphone), as …
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Aeroacoustics Applications to Jets and Rotors
… This dissertation investigates two key topics: noise suppression in supersonic rectangular jets and rotor noise characterization in hover and ground effect. Using high-fidelity numerical simulations and theoretical analyses, this research aims to develop effective noise mitigation strategies and …
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FABRICATION AND CHARACTERIZATION OF ACTIVE NANOSTRUCTURES
… The levels and origin of low-frequency noise in junctionless transistor devices fabricated from silicon nanowires and also from GeOI devices are reported. Low-frequency noise is an indicator of the quality of the material, hence its characterization can reveal the quality and perhaps …
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Systematic and Statistical Uncertainties in the Characterization of Gravitational-Wave Sources
… analysis, including priors, waveform models, noise characterization, and instrumental calibration errors, on the final PE results. This thesis demonstrates that in the case of marginal signals, the choice of priors can greatly impact the PE results and the subsequent astrophysical …
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Ambient acoustics as indicator of environmental change in the Beaufort Sea: experiments & methods for analysis
… of this work examines the effect on ambient noise characteristics due to changes to the Beaufort Sea sound speed profile (SSP) and ice cover. Specifically, the emergence of a warm water intrusion near 70 m depth has altered the historical Arctic SSP while the ice cover has become thinner and …
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DEVELOPMENT OF QUANTUM TECHNOLOGIES FOR QUANTUM COMMUNICATION
… In collaboration with INRiM, an active phase-noise cancellation system for TF-QKD has been implemented and tested, demonstrating stable phase coherence over two 50-km fiber spools. Moreover, field measurements on underground fibers near medium-voltage lines have been conducted in the RSE test …
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Ambient Acoustics as Indicator of Environmental Change in the Beaufort Sea: Experiments & Methods for Analysis
… of this work examines the effect on ambient noise characteristics due to changes to the Beaufort Sea sound speed profile (SSP) and ice cover. Specifically, the emergence of a warm water intrusion near 70 m depth has altered the historical Arctic SSP while the ice cover has become thinner and …
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A Fully Monolithic 2.5 GHz LC Voltage Controlled Oscillator in 0.35 μm CMOS Technology
… voltage controlled oscillators (VCOs), and low noise amplifiers (LNAs). Future mass-market RF links, such as BlueTooth, will require the potentially low-cost single-chip solutions that CMOS can provide. In order for such single-chip solutions to be realized, RF circuits must be designed that can …
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High Performance Broadband Photodetectors Based on Graphene/Semiconductor Heterostructures
… of fabrication as well as optoelectronic characterization of photodetectors based on graphene/semiconductor heterostructures field-effect transistors (GFETs). GFETs with different architectures were demonstrated and systematically studied under optical illumination ranging from deep-UV to …
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Noise Characerization For Proposed UCF Phyiscal Science Building Sites.
Today's Advance Technology Facilities require low noise levels and increased noise monitoring. Ambient noise can interfere with the accuracy and precision of experiments and manufacturing processes. Therefore preconstruction site surveys are needed to develop strategies for mitigating noise. …
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Aircraft noise exposure trends and impact on cardiovascular health in the United States
Aircraft noise is a considerable environmental stressor for communities surrounding airports. There is also growing interest in the relationship between noise and health outcomes as exposure has been associated with physiological and psychological effects. Yet the extent to which aircraft noise …
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Interface circuits for readout and control of a micro-hemispherical resonating gyroscope
Gyroscopes are inertial sensors that measure the rate or angle of rotation. One of the most promising technologies for reaching a high-performance MEMS gyroscope has been development of the micro-hemispherical shell resonator. (μHSR) This thesis presents the electronic control and read-out …