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Filtering by: Creator Letchworth, Christopher A. Remove constraint Creator: Letchworth, Christopher A. Committee Member Marcum, Wade Remove constraint Committee Member: Marcum, Wade

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  • Bi-level flexible-robust optimization for energy allocation problems

    Creator:
    Biswas, Arpan
    Abstract:
    A common problem in energy allocation problems is managing the trade-off between selling surplus energy to maximize short term revenue, versus holding surplus energy to hedge against future shortfalls. For energy allocation problems, this surplus represents resource flexibility and is quantified as the surplus energy after meeting the demand. The...
    Resource Type:
    Masters Thesis
    Full Text:
    Problems Abstract approved: ______________________________________________________ Christopher

  • A CFD Analysis of a Single Channel in the Mars Hopper Engine

    Creator:
    Koll, Christopher J.
    Abstract:
    The Mars Hopper is an alternative extraterrestrial vehicle for the collection of samples from the Martian surface. This thesis studied the engine of the Mars Hopper to assess the validity of the current planned launch cycle according to current parameters. To do this, the engine was simplified to an average...
    Resource Type:
    Masters Thesis
    Full Text:
    . ©Copyright by Christopher J. Koll August 28, 2017 All Rights Reserved A CFD Analysis of a

  • Solution-based deposition of functional thin films : development of a glucose biosensor and thermal processing of CZTS nanoparticle films

    Creator:
    Durgan, Christopher J.
    Abstract:
    The development of solution-based methods for deposition of different thin film material is presented as an alternative to high cost vacuum-based methods. For certain materials, vacuum techniques are unsuitable for processing. Additionally, vacuum-based processes present high capital costs associated with equipment, and slow processing times. Atmospheric pressure solution based techniques...
    Resource Type:
    Masters Thesis
    Full Text:
    Nanoparticle Films by Christopher J. Durgan A THESIS submitted to Oregon State University

  • Hybrid Statistical and Engineering Optimization Architectures in Early Multidisciplinary Designs of Resilience and Expensive Black-box Complex Systems

    Creator:
    Biswas, Arpan
    Abstract:
    Practical engineering design problems are generally multi-disciplinary with limited budget and high risk in terms of life loss, economic resources, etc. In the early phase of such problems, selection of true efficient designs is desired while minimizing overall design cost by avoiding expensive search processes. However, the task is difficult...
    Resource Type:
    Dissertation
    Full Text:
    -Objective Black-Box Functions. Co-authors: Claudio Fuentes, Christopher Hoyle For the manuscript: A

  • New Rating Methods for Pin and Hanger Assemblies in Steel Bridges

    Creator:
    Montgomery, Jacob R.
    Abstract:
    Pin and hanger assemblies are a common type of connection used in past engineering practice for steel girder bridges. The connection consists of pins, hanger plates, and girder ends. The connection detail was used widely between 1930 and 1980. The connections are considered fracture critical and nonredundant because connection failure...
    Resource Type:
    Masters Thesis
    Full Text:
    Christopher C. Higgins Pin and hanger assemblies are a common type of connection used in past

  • Fission Gas Bubble Behavior in Uranium Carbide

    Creator:
    Matthews, Christopher
    Abstract:
    The need for cheap reliable energy, while simultaneously avoiding uranium supply constraints makes uranium carbide (UC) fueled Gas Fast Reactors offer an attractive nuclear reactor design. In order to qualify the fuel, an enhanced understanding of the behavior of uranium carbide during operation is paramount. Due to a reduced re-solution...
    Resource Type:
    Dissertation
    Full Text:
    Gas Bubble Behavior in Uranium Carbide by Christopher Matthews A DISSERTATION submitted to Oregon

  • Mechanics of three-dimensional microenvironments of cells

    Creator:
    Jones, Christopher
    Abstract:
    The structure and mechanics of tissues affect many important cellular functions such as migration, differentiation, and growth. Mechanical interactions between cells and the extracellular matrix (ECM), as well as ECM-mediated mechanical communication between cells, plays a part in coordinating collective cellular dy- namics during critical processes such as morphogenesis, tissue...
    Resource Type:
    Dissertation
    Full Text:
    Mechanics of Three-Dimensional Microenvironments of Cells by Christopher Jones A DISSERTATION submitted

  • A novel framework for uncertainty propagation in river systems based on performance graphs using two-dimensional hydrodynamic modeling

    Creator:
    Gifford-Miears, Christopher H.
    Abstract:
    This thesis presents a novel approach for propagation of uncertainty in river systems. Errors in data observations and predictions (e.g., stream inflows), in model parameters, and resulting from the discretization of continuous systems, all point to the need to accurately quantify the amount of uncertainty carried through the modeling process....
    Resource Type:
    Masters Thesis
    Full Text:
    Graphs using Two-dimensional Hydrodynamic Modeling by Christopher H. Gifford-Miears A THESIS

  • Multi-Objective Optimization in Multiagent Systems

    Creator:
    Yliniemi, Logan Michael
    Abstract:
    Cooperative multiagent systems are used as solution concepts in many application domains including air traffic control, satellite communications, and extra planetary exploration. As systems become more distributed and complex, we observe three phenomena. First, these systems cannot be accurately modeled, rendering traditional model based control methods inadequate. Second, system parameters...
    Resource Type:
    Dissertation
    Full Text:
    in a nonlinear manner, making it difficult for humans to develop heuristic based control policies

  • Characterization of reinforced fill soil, soil-reinforcement interaction, and internal stability of very tall MSE walls

    Creator:
    Walters, James J.
    Abstract:
    In many geotechnical design situations involving tight right-of-way constraints, Mechanically Stabilized Earth (MSE) walls are often the most cost-effective and reliable earth retention technology among available alternatives. However, few well-documented case histories with detailed material testing, instrumentation programs and construction observation of performance are available in the literature. Despite the...
    Resource Type:
    Masters Thesis
    Full Text:
    theoretically-based methods. As a result, current design methods for MSE walls result in a large amount of