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  • Prototyping a triple-layer phoswich detection system

    Creator:
    Duncan, Christopher L.
    Abstract:
    Multi-layer optically coupled scintillation based radiation detectors, known as phoswich detectors, have rapidly evolved in recent years. During the same time, digital signal processing has improved radiation discrimination accuracy and enhanced reliability, while reducing complexity and size of traditional analog signal processing methods. A new generation of high-speed radiation detectors...
    Resource Type:
    Masters Thesis
    Full Text:
    : David M. Hamby Multi-layer optically coupled scintillation based radiation detectors, known as

  • Kinematic and cyclostationary parameter estimation for co-channel emitter location applications

    Creator:
    Ohm, David R.
    Abstract:
    The problem of locating a signal source, or an emitter, has many civilian and military applications, such as communication regulations enforcement, military reconnaissance, and search-and-rescue operations. Many of the most widely used emitter location methods rely on the accurate and robust estimation of the differential time delay, or time-difference-of-arrival (TDOA),...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF David R. Ohm for the

  • Noise optimization for low-voltage CMOS audio preamplifier systems

    Creator:
    Brown, Matthew Eugene
    Abstract:
    There is a large and growing market for portable consumer audio products with very small size. As the size of these products is reduced, the area occupied by batteries becomes significant and hence limits the number of batteries to one. In order to build such small products, high levels of...
    Resource Type:
    Masters Thesis
    Full Text:
    -Young, Min-Gyu, Kerem, Charlie Myers, Ranga, Mengzhe, Anurag, Arun, David Bruneau, Matt Coe, Dan

  • A study of basic building blocks of analog-to-digital delta-sigma modulators

    Creator:
    Guo, Yuhua
    Abstract:
    In this thesis, a novel Direct-Charge-Transfer (DCT) integrator structure is proposed, which can settle much faster than regular switch-capacitor integrators. A new Spread-Spectrum Dynamic Element Matching (SS-DEM) algorithm is also introduced, which can effectively spread or shape the nonlinearity error of multi-bit DAC in the feedback path, thus improve the...
    Resource Type:
    Masters Thesis
    Full Text:
    to acknowledge Professor David Harold Gobeli and Professor Huaping Liu for taking the time to serve

  • Scaled modeling and simulation of ocean wave linear generator buoy systems

    Creator:
    Gore, Ganesh P.
    Abstract:
    Accurate scaled modeling and simulation are critical to advancing ocean wave linear generator buoys. A 100th scaled model of ocean wave generator buoy systems is analyzed by solving the Navier-Stokes equations. These equations are numerically solved using Computational Fluid Dynamics (CFD) by implementing the front capturing method. In this thesis,...
    Resource Type:
    Masters Thesis
    Full Text:
    . David Hackleman for their helpful suggestions. Special thanks go to Ken Rhinefrank, Emmanuel

  • Digital pulse shape discrimination methods for triple-layer phoswich detectors using wavelets and fuzzy logic

    Creator:
    Yousefi, Siavash
    Abstract:
    A two-channel data acquisition system for simultaneous detection and discrimination of beta particles and gamma rays has been developed. Each channel measures and analyzes the input pulses resulting from the absorption of radiation in the layers of the detector. The detector is a triple-layer phoswich (phosphor sandwich) scintillation detector followed...
    Resource Type:
    Masters Thesis
    Full Text:
    friend to me. I would like to acknowledge Dr. Abi Farsoni and Dr. David Hamby from the Radiation

  • Methods for evaluating the impact of renewable resource variability on grid operation and planning

    Creator:
    Halamay, Douglas A.
    Abstract:
    With the recent interest in increasing the penetration of renewable energy sources onto the power grid, there has been an unprecedented rapid deployment of wind generation, especially in the US Pacific Northwest. While wind farm developers have continued to expand their operations, power system operators are left to deal with...
    Resource Type:
    Masters Thesis

  • A Two-element CZT-based Radioxenon Detection System for Nuclear Weapon Test Monitoring

    Creator:
    Ranjbar, Lily
    Abstract:
    Detection of xenon radioisotopes (radioxenons) has proven to be an important method for detecting nuclear explosions and is particularly well suited for detecting undeclared underground testing. The radioxenon isotopes ¹³¹mXe (t₁/₂ = 11.934 d), ¹³³mXe (t₁/₂ = 2.19 d), ¹³³Xe (t₁/₂ = 5.243 d) and ¹³⁵Xe (t₁/₂ = 9.14 h)...
    Resource Type:
    Dissertation
    Full Text:
    . Kenneth Krane, Dr. David Hamby, Dr. Hoari Yang and Dr. Huaping Liu, thank you for accepting to be on my

  • High efficiency delta-sigma modulation data converters

    Creator:
    Lee, Kyehyung
    Abstract:
    Enabled by continued device scaling in CMOS technology, more and more functions that were previously realized in separate chips are getting integrated on a single chip nowadays. Integration on silicon has opened the door to new portable wireless applications, and initiated a widespread use of these devices in our common...
    Resource Type:
    Dissertation
    Full Text:
    , Professor Pavan Kumar Hanumolu, Professor Albrecht Jander, and Professor David McIntyre for their

  • Real-time radioxenon measurement using a Compton-suppressed well-type phoswich detector for nuclear explosion monitoring

    Creator:
    Alemayehu, Bemnet
    Abstract:
    Radioxenon detection is a technique used to monitor nuclear explosion and verify the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Because of an ultra-low concentration of radioxenon at radioxenon monitoring stations, radioxenon detection systems must have high sensitivity. This sensitivity is measured in terms of detector's minimum detectable concentration (MDC). It is required...
    Resource Type:
    Dissertation
    Full Text:
    dissertation committee: Professor David M. Hamby, Dr. Alena Paulenova, Professor Huaping Liu and Dr. Leah