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Filtering by: Creator Boschma, Anne L. C. Remove constraint Creator: Boschma, Anne L. C. Committee Member Trehu, Anne Remove constraint Committee Member: Trehu, Anne Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

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  • 5th-Order Elliptic LPF Using Passive Charge Compensation Technique (PCC) Design

    Creator:
    Tsai, Cheng H.
    Abstract:
    The passive charge compensation (PCC) technique was introduced for switched capacitor (SC) circuit to increase the slew rate and enhance the linearity performance, as PCC techniques are used on the Delta-Sigma modulator (DSM) in ADC circuitry. The PCC technique of the project was applied to the design of a SC...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Gabor C. Temes The passive charge compensation (PCC) technique was introduced for

  • Deep crustal and mantle inputs to North Sister Volcano, Oregon High Cascade Range

    Creator:
    Schmidt, Mariek E.
    Abstract:
    The Central Oregon High Cascade Range is an anomalously mafic segment of the Cascade Arc due to ongoing intra-arc extension, which allows most magmas to traverse the crust without stalling and evolving to more evolved compositions. North Sister, a composite volcano in this arc segment, has produced a seemingly monotonous...
    Resource Type:
    Dissertation

  • Groundwater Flooding and Guerrilla Trenches : a Participatory Approach for Flood Control

    Creator:
    Kemper, Joseph B.
    Abstract:
    Residents in South Falls City, a small town in the foothills of Oregon's Coast Range, battle intense flooding during the rainy season. Disagreements about surface water management pit neighbor against neighbor, but preliminary evidence suggests that groundwater flooding is an underlying cause. OSU researchers pair the emerging literature on groundwater...
    Resource Type:
    Masters Thesis
    Full Text:
    Taylor and Professor Anne Trehu, for your invaluable contributions and feedback, as well as my Graduate

  • Characterization of the Small-Strain Stiffness of Soils at an In-situ Liquefaction Test Site

    Creator:
    Donaldson, Aleyna M.
    Abstract:
    Strong ground motions from earthquakes can result in the reduction of the shear modulus and wave propagation characteristics of soils, and can produce liquefaction and cyclic softening during shaking and for some time following the seismic event. While the ground motions produced from controlled blasting are different than those in...
    Resource Type:
    Masters Thesis
    Full Text:
    grateful for the help of two of my mentors: Dr. Anne Trehu and Dr. Ben Leshchinsky. I appreciate Dr

  • Microbial Community Composition as a Driver of Chemical Composition Change in Streams and Wastewater

    Creator:
    Mahadwar, Gouri
    Abstract:
    Microbial communities in aquatic systems are dominant drivers of chemical transformation, including contaminants of emerging concern (CECs). This study quantified shifts in microbial communities and their relationship to shifts in chemical composition in surface waters in the Willamette Valley, Oregon. In addition to bulk chemical composition shifts, the relationship between...
    Resource Type:
    Masters Thesis
    Full Text:
    20 μL of 10% lysozyme was added to each filter. Samples were frozen (−80°C, 15 min) and thawed (37

  • Effects of Moisture Intrusion on the Performance of a Cross-Laminated Timber (CLT) Angle Bracket Connection

    Creator:
    Bora, Shrenik S.
    Abstract:
    Cross-laminated timber (CLT) is revolutionizing the use of wood in the construction sector of North America as a solution for walls and diaphragms in mid-rise or even high-rise timber structures on account of its environmental advantages, high strength-to-weight ratio, fire-safety performance, and propensity for prefabrication. However, considering the hygroscopic nature...
    Resource Type:
    Masters Thesis
    Full Text:
    wall-to-diaphragm L-bracket connection is exposed to two high moisture exposure conditions - flood

  • Feasibility of Thermal Restoration by Groundwater Additions in the Middle Fork John Day

    Creator:
    Hale, Abigail E.
    Abstract:
    Survival of ecological systems pivot on critical moments. In the arid John Day Basin of Eastern Oregon, extensive restoration of the stream and floodplain focused on supporting salmon has been ongoing for the past 20 years, but recurring short periods of extreme temperature increase and low flows result in mortality...
    Resource Type:
    Masters Thesis
    Full Text:
    water at 10°C lowers MFJD stream temperatures by several degrees. Previous studies suggest that as

  • Bridge Model Parameter Sensitivity in Pushover and Nonlinear Time History Analysis

    Creator:
    Johnsohn, Karryn E.
    Abstract:
    The aim of this research is to understand and quantify the modeling differences between CSiBridge and OpenSees, and to determine sensitive model parameters. When designing bridges for the high seismic region of California, the California Department of Transportation (Caltrans) performs nonlinear time history analysis of their bridge models. For three-dimensional...
    Resource Type:
    Masters Thesis
    Full Text:
    modeling recommendations. c©Copyright by Karryn E. Johnsohn June 9, 2016 All Rights Reserved Bridge

  • Heat Flow from a Vapor-Dominated Sublacustrine Vent Field Beneath Yellowstone Lake

    Creator:
    Favorito, Julia E.
    Abstract:
    Portions of Yellowstone Lake sit on top of a vigorous but not well understood hydrothermal system situated in a region of intense geologic and environmental forcings. A heat flow study conducted over the Stevenson Island Vent Field (SIVF), a vent field at the bottom of Yellowstone Lake underlain by an...
    Resource Type:
    Masters Thesis
    Full Text:
    Value/Units c Specific heat of water 4186 J kg-1 K-1 k Thermal conductivity W m-1 K-1 L Depth of the

  • Cross-laminated timber engineering : improvement and application

    Creator:
    Kramer, Anthonie
    Abstract:
    The development of cross-laminated timber (CLT) panel technology has opened up new opportunities for wood in tall buildings. Several characteristics including seismic performance and speed of construction have raised interest among designers. As CLT gains acceptance in the industry, alternative structural solutions need to be investigated to improve performance of...
    Resource Type:
    Masters Thesis
    Full Text:
    configuration of multiple 6.4 mm steel c-channels (Fig. 2.1). Fig. 2.1. Fixture for pressing CLT panels