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  • MOS switched-current biquadratic filters

    Creator:
    Lee, Bor
    Abstract:
    A MOS biquadratic (biquad) filter employing the switched-current technique is reported. The circuit uses current-mode processing which can offer wide bandwidth, low voltage operation, and can be implemented with standard CMOS technology. Examples of lowpass, highpass, and bandpass filters are given which illustrate the synthesis procedures and the versatility of...
    Resource Type:
    Masters Thesis
    Full Text:
    committee members, Dr. James H. Herzog, Dr. Stephen M. Goodnick, and Dr. John L. Nabelek for their time

  • Transparent electronics : thin-film transistors and integrated circuits

    Creator:
    Presley, Rick E.
    Abstract:
    This thesis focuses on two aspects of transparent electronics, SnO₂ transparent thin-film transistors (TTFTs) and transparent circuits. Both depletion- and enhancement-mode SnO₂ TTFTs are realized. The maximum effective mobility for the depletion- and enhancement-mode devices are 2 cm²V⁻¹s⁻¹ and 0.8 cm²V⁻¹s⁻¹, respectively. A variety of techniques to decrease the carrier...
    Resource Type:
    Masters Thesis
    Full Text:
    . Title: Transparent Electronics: Thin-Film Transistors and Integrated Circuits Abstract approved: John

  • Magnetotelluric Studies of Tectonic Systems and Volcanic Areas of North America

    Creator:
    Bowles-Martinez, Esteban
    Abstract:
    Magnetotellurics is used in two geologic settings on scales ranging from 1000-km tectonic structures to local features hundreds of meters wide. These areas are the Midcontinent Rift System (MRS) and its related mantle plume in the northern Midwestern United States and Newberry Volcano in central Oregon. The MRS study uses...
    Resource Type:
    Dissertation
    Full Text:
    , L Roy Bonner IV, Emily Hart, Beth Burton, Bryce Neal, Rebeca Gurrola, and Kate Scholz. This work

  • Delta-sigma modulators employing continuous-time circuits and mismatch-shaped DACs

    Creator:
    Zhang, Bo
    Abstract:
    Delta-sigma modulators are currently a very popular technique for making high-resolution analog-to-digital and digital-to-analog converters. These oversampled data converters have several advantages over conventional Nyquist-rate converters, including an insensitivity to many analog component imperfections, a simpler antialiasing filter and reduced accuracy requirements in the sample and hold. Though the initial...
    Resource Type:
    Dissertation
    Full Text:
    . Temes, Dr. Jack Kenney, Dr. Shih-Lien Lu and Dr. John L. Nabelek for taking time out of their busy

  • Paleomagnetic inclination shallowing in deep-sea sediments

    Creator:
    Arason, Pórdur
    Abstract:
    In this thesis anomalous downcore shallowing of paleomagnetic inclinations is interpreted to be caused by sediment compaction. Thus, compaction-induced inclination shallowing may influence tectonic reconstructions that are based on inclinations from deep-sea sediment cores. Progressive downcore shallowing of the remanent inclination was observed in a 120-m section of Plio- Pleistocene...
    Resource Type:
    Dissertation
    Full Text:
    D. Egbert, John L. Nábëlek, Nicklas G. Pisias, J. Brookes Spencer, Erwin Suess, and William H

  • Crustal structure and faulting of the Gulf of California from geophysical modeling and deconvolution of magnetic profiles

    Creator:
    Doguin, Pierre
    Abstract:
    Using gravity, magnetic, bathymetric and seismic refraction data, I have constructed a geophysical cross-section of the central part of the northern Gulf of California. The section exhibits a crustal thickness of 18 km and features an anomalous block of high density lower basement (3.15 g/cm³) which probably resulted from rifting...
    Resource Type:
    Masters Thesis
    Full Text:
    ? My thanks to all the geophysics faculty members, especially to John Nabelek for jumping late on my

  • Structural geology and dislocation modeling of the East Coyote anticline, eastern Los Angles basin

    Creator:
    Myers, Daniel J.
    Abstract:
    The 1994 Northridge and 1987 Whittier Narrows earthquakes warned Los Angeles residents of the threat of earthquakes due to unmapped, blind reverse faults and emphasized the importance of identifying and characterizing blind reverse faults in assessing the seismic hazard to the region. The East and West Coyote Hills in the...
    Resource Type:
    Masters Thesis

  • The Experiences of Women in First-Term Calculus: Factors Affecting Mathematical Confidence

    Creator:
    Petty Blaisdell, Amanda
    Abstract:
    As industries relating to science, technology, engineering, and mathematics in America continue to grow, employers will need more mathematicians and mathematically able workers than are currently graduating. Women are an underrepresented portion of these graduates, and researches say that this could be due to the difference between women’s and men’s...
    Resource Type:
    Masters Thesis
    Full Text:
    extended to the author’s committee members, Dr. Elise Lockwood, Dr. John Nabelek, and Dr. Kryn Freehling

  • A 3-D Tomographic Model of the P-wave Velocity Structure of the Central Cascadia Forearc

    Creator:
    Kenyon, Christopher Bradford
    Abstract:
    Signals from the R/V Langseth’s tuned airgun array were recorded on an array of 33 EarthScope FlexArray seismometers deployed in the Oregon Coast Range from 43.5° to 45°N as part of the 2012 Ridge2Trench experiment to image the structure of the Juan de Fuca plate. This segment of the Juan...
    Resource Type:
    Masters Thesis
    Full Text:
    thank Gary Egbert, and John Nabelek for serving on my committee, for providing me with valuable

  • Assessing disease impacts of hatcheries on downstream salmonids in the Willamette River Basin, Oregon

    Creator:
    Jakaitis, Michelle
    Abstract:
    Hatcheries are often perceived as a source of pathogen amplification, potentially increasing disease risk to free-ranging populations; at the same time, free-ranging fishes may introduce pathogens into hatcheries through untreated water sources. Many pathogens exist naturally within the environment (with the exception of introduced pathogens) and the presence of a...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: ____________________________________________________________ Jerri L. Bartholomew