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Full-Text Articles in Engineering

Classification System For Impedance Spectra, Carl Gordon Sapp May 2011

Classification System For Impedance Spectra, Carl Gordon Sapp

Masters Theses

This thesis documents research, methods, and results to satisfy the requirements for the M.S. degree in Electrical Engineering at the University of Tennessee. This thesis explores two primary steps for proper classification of impedance spectra: data dimension reduction and effectiveness of similarity/dissimilarity measure comparison in classification. To understand the data characteristics and classification thresholds, a circuit model analysis for simulation and unclassifiable determination is studied. The research is conducted using previously collected data of complex valued impedance measurements taken from 1844 similar devices. The results show a classification system capable of proper classification of 99% of data samples with well-separated …


Design Of A High-Voltage, Differential Drive Bradbury-Nielsen Gate Amplifier With Ultra-High Slew Rate And Input Isolation, Kevin Christopher Omoumi May 2011

Design Of A High-Voltage, Differential Drive Bradbury-Nielsen Gate Amplifier With Ultra-High Slew Rate And Input Isolation, Kevin Christopher Omoumi

Masters Theses

To isolate and study various components of a nuclear reaction, elaborate equipment must be developed to aid in this process. This thesis presents the design and implementation of an ultra-high slew rate Bradbury-Nielsen gate driver circuit with high-voltage input isolation. This design will be used in a multi-pass time-of-flight isomer spectrometer and separator application integrated into an overall instrument called the Oak Ridge Isomer Spectrometer and Separator (ORISS). The output drive signals of this circuit are transmitted through a vacuum feed-through system to supply the necessary signals to the Bradbury-Nielsen gate contained within the vacuum. A differential driving signal with …