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Filtering by: Creator Wirth, Julie A. Remove constraint Creator: Wirth, Julie A. Degree Name Master of Science (M.S.) Remove constraint Degree Name: Master of Science (M.S.)

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  • Emergence, survival and reproduction of three species of forbs important to sage grouse nutrition in response to fire, microsite and method of establishment

    Creator:
    Wirth, Troy A.
    Abstract:
    Since settlement of the Intermountain West, sage grouse abundance and productivity has declined and their range has decreased. The decline of sage grouse populations is primarily due to permanent loss and degradation of sagebrush-grassland habitat. Recently, several studies have shown that sage grouse productivity may be limited by the availability...
    Resource Type:
    Masters Thesis

  • Role of Stoichiometry on Ordering in Ni-Cr Alloys

    Creator:
    Teng, Fei
    Abstract:
    Mechanical property degradation due to isothermal ageing is of potential concern for alloys based on the Ni-Cr binary system (e.g., Inconel 690, 625), particularly in nuclear power applications where component lifetimes can exceed 40 years. In the present research, the disorder-order phase transformation, which is the primary mechanism of ageing,...
    Resource Type:
    Masters Thesis
    Full Text:
    : Role of Stoichiometry on Ordering in Ni-Cr Alloys Abstract approved: Julie D. Tucker

  • Heat treatment effects on CPM-M4 tool steel performance as edged blade material

    Creator:
    Lian, Sidi
    Abstract:
    CPM-M4 tool steel is a commonly used knife blade material due to its high strength and wear resistance. The goal of this thesis is to understand how heat treatment parameters affect blade performance and microstructure.Five heat treatments were applied to CPM-M4 steel by varying austenitizing and tempering temperatures. The microstructures...
    Resource Type:
    Masters Thesis

  • Microstructural Characterization of Porosity in U-Mo Low Enriched Uranium Plate Fuel

    Creator:
    Westman, Bjorn E.
    Abstract:
    New low enriched uranium (LEU) fuels are being developed for replacement of high enriched uranium (HEU) fuels in high power research reactors. U-Mo LEU plate fuels have been identified as a candidate for replacement of current HEU fuels. However, U-Mo fuels tend to exhibit accelerated swelling typically at fission densities...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: ______________________________________________________ Julie D

  • Corrosion of Carbon and Stainless Steels in H₂O-sCO₂ Environments for Power Cycle Applications

    Creator:
    Teeter, Lucas
    Abstract:
    The corrosion behaviors of carbon and stainless steels were investigated in supercritical CO₂ (sCO₂ ) containing H₂O and O₂ simulating conditions that exist in direct sCO₂ power cycle heat exchangers. Thermodynamic properties of CO₂-H₂O-O₂ systems related to the corrosion phenomena were determined using NIST software. The exposure tests of the...
    Resource Type:
    Masters Thesis
    Full Text:
    Stainless Steels in H2O-sCO2 Environments for Power Cycle Applications Abstract approved: Julie Tucker

  • Corrosion Resistance of Alloys in Seawater and Supercritical Carbon Dioxide Environments

    Creator:
    Repukaiti, Reyixiati
    Abstract:
    The corrosion resistances of several alloys were investigated to optimize performance and cost in seawater and supercritical CO2 environments. Many alloys are prone to corrosion in seawater and/or supercritical CO2 containing impurity environments. Exposure and electrochemical experiments were conducted in both environments to evaluate alloys’ corrosion resistance. In seawater corrosion...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: ______________________________________________________ Julie Tucker The corrosion

  • Integrating functional trait frameworks into restoration : the role of seed and seedling traits in recruitment success

    Creator:
    Larson, Julie E.
    Abstract:
    Seeding is a vital tool to facilitate recovery of degraded ecosystems, but low seedling recruitment rates limit the utility of this practice in a range of ecosystems across the globe. Plant functional traits impact individual fitness through effects on growth, reproduction and survival. Consequently, seed and seedling trait variation among...
    Resource Type:
    Masters Thesis
    Full Text:
    Recruitment Success by Julie E. Larson A THESIS submitted to Oregon State University in

  • Human Performance with Multiple UAV Systems: Use Cases and Modeling

    Creator:
    Uriarte, Patrick A.
    Abstract:
    Commercial and public safety usage of Unmanned Aerial Vehicles in the National Airspace is currently restricted by federal regulation. The Federal Aeronautics Association is interested in modifying the restrictions; however, research is needed to study the human factor and required aptitude for a single human operating multiple UAVs. This Master’s...
    Resource Type:
    Capstone Project
    Full Text:
    1.1 Human Performance with Multiple UAV Systems: Use Cases and Modeling by Patrick A

  • Terrain-Aware Probabilistic Search Planning for Unmanned Aerial Vehicles

    Creator:
    Schomer, Nathan L.
    Abstract:
    Mountain search and rescue is a vital form of emergency response to assist people in austere environments (e.g., extreme terrain, poor weather). Volunteer mountain search and rescue teams in the United States have begun adopting consumer- grade unmanned aerial vehicles to assist a variety of tasks (e.g., search, resource delivery);...
    Resource Type:
    Masters Thesis
    Full Text:
    Search Planning for Unmanned Aerial Vehicles Abstract approved: Julie A. Adams Mountain search and

  • Artificial Swarm Control Through Learning Based Leadership

    Creator:
    Tuzel, Ovunc
    Abstract:
    Collective migration in animal groups is often guided by distributed leader agents that influence their peers by modulating their motion behaviors. Distributed leadership is a promising navigation strategy for artificial swarms, but designing the leaders’ controllers is difficult due to the swarm’s collective emergent behaviors. The presented research formulates a...
    Resource Type:
    Masters Thesis
    Full Text:
    Based Leadership Abstract approved: Julie A. Adams Collective migration in animal groups is often