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    A Confidence-Prioritization Approach to Data Processing in Noisy Data Sets and Resulting Estimation Models for Predicting Streamflow Diel Signals in the Pacific Northwest
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    Gustafson, Nathaniel Lee
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    Streams in small watersheds are often known to exhibit diel fluctuations, in which streamflow oscillates on a 24-hour cycle. Streamflow diel fluctuations, which we investigate in this study, are an informative indicator of environmental processes....
  • ETD
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    A Design Basis for Composite Cascode Stages Operating in the Subthreshold/Weak Inversion Regions
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    Waddel, Taylor Matt
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    Composite cascode stages have been used in operational amplifier designs to achieve ultra-high gain at very low power. The flexibility and simplicity of the stage makes it an appealing choice for low power op-amp designs. Op-amp design using the...
  • ETD
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    A High-Gain, Low-Power CMOS Operational Amplifier Using Composite Cascode Stage in the Subthreshold Region
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    Singh, Rishi Pratap 1983-
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    This thesis demonstrates that the composite cascode differential stage, operating in the subthreshold region, can form the basis of a high gain (113 dB) and low-power op amp (28.1 uW). The circuit can be fabricated without adding a compensation...
  • ETD
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    A PAM Decomposition of Weak CPM
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    Wardle, Mason B 1977-
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    The Enhanced Flight Termination System uses weak CPM as its modulation scheme and a limiter-discriminator as its demodulation scheme. A PAM representation of weak CPM was developed which representation provided the necessary componenents to build a...
  • ETD
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    A Ray-Based Investigation of the Statistical Characteristics and Efficient Representation of Multi-Antenna Communication Channels
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    German, Gus Ryan 1976-
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    Multi-antenna communication systems are attracting research interest as a means to increase the information capacity, reliability, and spectral efficiency of wireless information transfer. Ray-tracing methods predict the behavior of wireless...
  • ETD
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    Active Minimization of Acoustic Energy Density in a Mock Tractor Cab
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    Faber, Benjamin Mahonri 1976-
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    An active noise control (ANC) system has been applied to the problem of attenuating low-frequency tonal noise inside small enclosures. The intended target application of the system was the reduction of the engine firing frequency inside heavy...

  • ETD
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    Active Minimization of Acoustic Energy Density to Attenuate Radiated Noise from a Diesel Generator
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    Boone, Andrew J 1979-
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    The focus of this thesis was to use active noise control (ANC) to globally minimize the tonal and broadband noise radiating from a diesel generator enclosure. The major goal of this research was to show that minimizing the noise within the...
  • ETD
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    Active Noise Control of a Centrifugal Fan Mounted in a Mock Laptop Enclosure
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    Esplin, John J.
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    Noise from information technology (IT) equipment is a significant problem in today's modern society. Active Noise Control (ANC) has shown promise in reducing the effect of IT fan noise on users. Though ANC has been applied to axial fans (such as...
  • ETD
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    Active Noise Control of a Two-Fan Exhaust-Mounted Array Using Near-Field Control Sources and Error Sensors
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    Rust, Ryan Leonard 1982-
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    Multiple fans are sometimes used in an array configuration to cool various types of electronic equipment. In addition to adding another noise source, using two fans with closely spaced blade passage frequencies (BPF) can create an annoying beat...
  • ETD
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    Advancements in the Solid-state Impact-ionization Multiplier (SIM) Through Theory, Simulation and Design
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    Johnson, Michael S
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    This dissertation outlines the study and development of a Solid-state Impact-ionization Multiplier (SIM). The SIM is a stand-alone current amplifier designed with optical detection systems in mind. The SIM amplifies signals utilizing impact...
  • ETD
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    Aerial Recovery of Micro Air Vehicles: Orbit Estimation and Tracking
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    Carlson, Daniel Clarke 1983-
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    Aerial recovery of autonomous micro air vehicles (MAVs) presents many unique challenges due to the difference in size and speed of the recovery vehicle and MAV. This thesis presents algorithms to enable an autonomous MAV to estimate the orbit of a...
  • ETD
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    An Analysis of SeaWinds Simultaneous Wind/Rain Retrieval in Severe Weather Events
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    Allen, Jeffrey R 1979-
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    Scatterometers, such as SeaWinds, can provide wide coverage of ocean surface winds. They estimate near-surface wind vectors by relating measured radar backscatter to a geophysical model function. However, SeaWinds measurements are also sensitive...
  • ETD
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    An Implementation of Field-Wise Wind Retrieval for Seawinds on QuikSCAT
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    Fletcher, Andrew S. 1976-
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    Field-wise wind estimation (also known as model-based wind estimation) is a sophisticated technique to derive wind estimates from radar backscatter measurements. IN contrast to the more traditional method known as point-wise wind retrieval,...

  • ETD
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    Analog Feedback Control of an Active Sound Transmission Control Module
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    Sagers, Jason Derek 1982-
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    This thesis provides analytical and experimental proof-of-concept for a new feedback-controlled sound transmission control module for use in an active segmented partition (ASP) array. The objective of such a module is to provide high transmission...
  • ETD
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    Analysis and Design of Low-Jitter Oscillators
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    Fitzpatrick, Justin Jennings 1978-
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    This thesis presents an examination of the jitter performance of different oscillator types in the presence of flicker noise, white noise and power supply noise. Key results are achieved using time domain simulations to determine cycle jitter of...
  • ETD
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    Analysis and Mitigation of SEU-induced Noise in FPGA-based DSP Systems
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    Pratt, Brian Hogan 1980-
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    This dissertation studies the effects of radiation-induced single-event upsets (SEUs) on digital signal processing (DSP) systems designed for field-programmable gate arrays (FPGAs). It presents a novel method for evaluating the effects of radiation...
  • ETD
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    Bayesian Test Analytics for Document Collections
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    Walker, Daniel David
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    Modern document collections are too large to annotate and curate manually. As increasingly large amounts of data become available, historians, librarians and other scholars increasingly need to rely on automated systems to efficiently and...
  • ETD
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    Characterization and Preliminary Demonstration of Microcantilever Array Integrated Sensors
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    Anderson, Ryan R.
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    I characterize the behavior of microcantilever arrays which utilize the in-plane photonic transduction that I've previously developed and evaluate the performance of the microcantilever arrays in simple sensing scenarios with integrated...
  • ETD
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    Characterization of a Phased Array Feed Model
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    Jones, David A 1981-
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    Creating accurate software based models of phased array feeds (PAFs) is one of many steps to successfully integrating PAFs with current and future radio telescopes, which is a goal of many groups around the globe. This thesis characterizes the...
  • ETD
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    Circuit and Modeling Solutions for High-Speed Chip-to-Chip Communication
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    Hollis, Timothy Mowry 1972-
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    This dissertation presents methods for modeling and mitigating voltage noise and timing jitter across high-speed chip-to-chip interconnects. Channel equalization and associated tuning schemes have been developed to target the distinct...
  • ETD

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