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Filtering by: Creator Lee, W. O. Remove constraint Creator: Lee, W. O. License Attribution 4.0 (CC BY 4.0) Remove constraint License: Attribution 4.0 (CC BY 4.0)

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  • The Processing and Microstructures of 309L Stainless Steel Clad onto Carbon Steel with Wire-fed Directed Energy Deposition

    Creator:
    Bozeman, Scott C.
    Abstract:
    Directed energy deposition and laser cladding technologies are suitable advanced manufacturing techniques for applying corrosion-resistant claddings to large carbon steel components. In this work, we clad 309L stainless steel wire onto carbon steel substrates and examine the effects of cladding parameters (laser power and travel speed) on metallurgical bonding, composition,...
    Resource Type:
    Masters Thesis
    Full Text:
    power on bead geometry, left = 800 W, middle = 1000 W, right = 1200 W. Adapted from Akbari et al. [38

  • Impact of Convective Activity on Precipitation delta O-18 in Isotope-Enabled General Circulation Models

    Creator:
    Hu, Jun, Emile-Geay, Julien, Nusbaumer, Jesse, and Noone, David
    Abstract:
    The delta O-18 signal preserved in paleoarchives is widely used to reconstruct past climate conditions. In many speleothems, this signal is classically interpreted via the amount effect. However, recent work has shown that precipitation delta O-18 (delta O-18(p)) is greatly influenced by convective processes distinct from precipitation amount, and new...
    Resource Type:
    Article
    Full Text:
    Impact of Convective Activity on Precipitation δ18O

  • Alternate Methods for the Extraction and Measurement of Pore Solution in Fresh Concrete

    Creator:
    Biever, Joseph
    Abstract:
    Knowledge of the pore solution composition and pore solution resistivity can be helpful for determining the durability of concrete structures. Most notably, pore solution resistivity can be used in the calculation of the formation factor of concrete, which is a ratio of the electrical resistivities of concrete and its pore...
    Resource Type:
    Honors College Thesis
    Full Text:
    Considerations," Concr Sci Eng., 2010, 3. 2. Weiss W, Ley M, Isgor O, Van Dam T., "Toward Performance

  • Application of Coupled Oscillator Model to Terahertz and Optical Control of Plasmon Induced Opacity in Coupled Metamaterials

    Creator:
    Sprague, Milo X.
    Abstract:
    Terahertz (THz) frequencies of the electromagnetic spectrum have been underutilized when compared to neighboring microwave and infrared frequencies, largely due to the difficulties controlling and detecting these fields. In a step toward gaining control over THz frequencies, my advisor Dr. Yun-Shik Lee’s group experimentally demonstrated optical-pulse THz-control over a plasmonic...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    metamaterial obtained in the lab of Dr. Yun-Shik Lee at Oregon State University. The metamaterial sample used

  • Machine Learning and Optimization Applications in Agriculture

    Creator:
    Molotkov, Alexander
    Abstract:
    The ever-increasing global population presents looming problems for the field of agriculture. Global food demand will, at some point, increase to the point where there is not enough crop-ready land to keep up. This creates an additional incentive, other than economics, for growers to increase their yield-per-acre and make sure...
    Resource Type:
    Honors College Thesis
    Full Text:
    Manufacturing Engineering Stefan Lee, Committee Member, representing Electrical and Computer Engineering Brian

  • Mental Health in Eastern Europe during the COVID-19 Pandemic: A Systematic Review and Meta-Analysis of Depression and Anxiety

    Creator:
    Miller, Saylor O.
    Abstract:
    Objective: To perform a systematic review and meta-analysis on the prevalence rate of mental health disorders including anxiety, depression, and insomnia during the COVID-19 pandemic in Eastern Europe in the general population, as well as within select sub-populations (i.e., students, general healthcare workers, and frontline workers). Data sources: Articles in PubMed,...
    Resource Type:
    Honors College Thesis
    Full Text:
    –60. 4. Xiong J, Lipsitz O, Nasri F, Lui LMW, Gill H, Phan L, et al. Impact of COVID-19 pandemic

  • Experience of Women in STEM: Three Ways

    Creator:
    Andreyka, Elizabeth O.
    Abstract:
    The intent of this thesis is to develop three creative non-fiction essays exploring the experience of being an undergraduate woman in a STEM field. The essays will all take on variations in form, humor, and perspectives. The purpose is to explore the position of women in STEM and the different...
    Resource Type:
    Honors College Thesis
    Full Text:
    ; haven’t needed one since.” 0 1 2 3 4 5 6 7 8 9 10 1 2 3 4 Le ve l o f M is o gy n y

  • Real-time Speech Workload Estimation

    Creator:
    Fortune, Julian D.
    Abstract:
    Demanding task environments (e.g., supervising a remotely piloted aircraft) require performing tasks quickly and accurately; however, periods of low and high operator workload can decrease task performance. Intelligent modulation of the system’s demands and interaction modality in response to changes in operator workload state may increase performance by avoiding undesirable...
    Resource Type:
    Honors College Thesis
    Full Text:
    Engineering Stefan Lee, Committee Member, representing the School of Electrical and Computer Engineering

  • Deep Learning Temporal Logic Specifications

    Creator:
    Hekkala, Claire M.
    Abstract:
    This thesis seeks to explain a new method of extracting temporal logic formulas from time series data using machine learning. Two strategies were followed during the development of this research: first, a generative adversarial network was combined with already-existing temporal logic extraction code by Belta. This was achieved by injecting...
    Resource Type:
    Honors College Thesis
    Full Text:
    _____________________________________________________________________ Stefan Lee, Committee Member, representing School of Engineering and Computer Science

  • Thermal Anomalies Detect Critical Global Land Surface Changes

    Creator:
    Mildrexler, D. J., Zhao, M., Cohen, W. B., Running, S. W., Song, X. P., and Jones, M. O.
    Abstract:
    Measurements that link surface conditions and climate can provide critical information on important biospheric changes occurring in the Earth system. As the direct driving force of energy and water fluxes at the surface-atmosphere interface, land surface temperature (LST) provides information on physical processes of land-cover change and energy-balance changes that...
    Resource Type:
    Article
    Full Text:
    . Zhao, W. Cohen, S. Running, X. Song, and M. Jones, 2017: Thermal anomalies detect critical global land