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Filtering by: Committee Member Gibson, Nathan L. Remove constraint Committee Member: Gibson, Nathan L. Degree Level Master's Remove constraint Degree Level: Master's

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  • Zonal Resource Adequacy for Voltage Control

    Creator:
    Boller, Michael D.
    Abstract:
    In a power system, operators maintain voltage stability through adequate reactive reserves. Maintaining and accessing an efficient allocation of reactive reserves is prohibitively complex because of reactive line losses, the variety of reactive resources, and either limited or variable reactive outputs from renewable sources. By clustering the system into smaller...
    Resource Type:
    Masters Thesis
    Full Text:
    VSMMi = Vi(0)−min[Vi(l)] Vi(0)− Vi,min (2.1) where: · VSMMi is the VSMM for bus i, · Vi(0) is the

  • Predicting the most likely state for a basic geophysical flow : theoretical framework

    Creator:
    Duran, Rodrigo
    Abstract:
    Statistical mechanics studies the probability that a system is in a certain state given one or more constraints which are usually fixed conserved quantities. It is a particularly useful and powerful approach for problems with a large number of degrees of freedom where a complete knowledge of the system is...
    Resource Type:
    Capstone Project
    Full Text:
    . Nathan L. Gibson and Dr. Radu Dascaliuc Department of Mathematics Oregon State University Kidder Hall

  • Operator splitting methods for Maxwell's equations in dispersive media

    Creator:
    Keefer, Olivia A.
    Abstract:
    Accurate modeling and simulation of wave propagation in dispersive dielectrics such as water, human tissue and sand, among others, has a variety of applications. For example in medical imaging, electromagnetic waves are used to interrogate human tissue in a non-invasive manner to detect anomalies that could be cancerous. In non-destructive...
    Resource Type:
    Masters Thesis
    Full Text:
    like to thank Dr. Ted Brekken, Dr. Nathan Gibson, and Dr. Robert Higdon for dedicating their time to

  • An assessment of a mesh-based method for slab-geometry transport in stochastic materials

    Creator:
    Bassett, Brody R.
    Abstract:
    There exists a variety of methods to solve the radiation transport equation in stochastic materials, including the Levermore-Pomraning method and the atomic mix method, each of which is designed to replicate the results given by benchmarks with materials rearranged in a randomized fashion. While the atomic mix method is very...
    Resource Type:
    Masters Thesis
    Full Text:
    basis and weight functions (j ∈ (L,R)): bLi = vLi = xi+1/2 − x ∆xi , (2.28) bRi = vRi = x− xi−1/2

  • Performance of hybrid methods for representative nonproliferationproblems

    Creator:
    Bevill, Aaron M.
    Abstract:
    Adjoint-derived weight windowing is a hybrid deterministic/Monte Carlo method to simulate radiation transport. In adjoint-derived weight windowing, a deterministic adjoint solution is used to create weight windows for a Monte Carlo simulation. The intent of this work is to identify factors that reduce the Figure of Merit (FOM) of Monte...
    Resource Type:
    Masters Thesis
    Full Text:
    Drs. Nathan Gibson, Todd Palmer, Brian Woods, Sourabh Apte, Guenter Schneider, and Alexey Soldatov at

  • Automated model parameter extraction for noise coupling analysis in silicon substrates

    Creator:
    Peterson, Brett
    Abstract:
    An automated method, requiring the fabrication of a small set of test structures, efficiently extracts the coefficients of Z-parameter based macromodels. The extraction approach has been validated for both heavily and lightly doped substrates and can be applied to a variety of technologies. After the parameters of a macromodel have...
    Resource Type:
    Masters Thesis
    Full Text:
    truely grateful for the opportunities they have given me. I would also like to thank my GCR, Nathan

  • Local Existence for a Non-local Multi-Species Advection-Diffusion Equation with Newtonian Potential

    Creator:
    Radke, Zachary
    Abstract:
    In biological models, advection is inherently a non-local process. Coupled with diffusion, it typically models chemotaxis, which is the response of bacteria to the presence of some chemo attractant. For example, E. coli cells use their flagella to probe their surroundings to determine where they should move. The advection-diffusion equation...
    Resource Type:
    Masters Thesis
    Full Text:
    conditions, and that K : T → R is twice differentiable with ∇K ∈ L∞(T). It seems that one could extend the

  • Operator Splitting for a Wildfire Model in a Heterogeneous Environment with a Surrogate Wind Velocity Field

    Creator:
    Pantuso, Nicholas M.
    Abstract:
    Living in the Pacific Northwest, we are acutely aware of the dangers posed by wildfires. Largely due to the worsening effects of climate change, this danger is only increasing. Along with causing property and economic damage to those communities affected by wildfires, exposure to the smoke generated by wildfires can...
    Resource Type:
    Masters Thesis
    Full Text:
    been possible without her. I would also like to thank my committee members: Dr. Nathan Gibson, Dr

  • Evaluating Stiffness Metrics for Predicting the Cost of Chemical Kinetics Integration

    Creator:
    Alferman, Andrew Thomas
    Abstract:
    Simulations of combustion and reacting flows often encounter stiffness in the equations governing chemical kinetics. Explicit solvers for these ordinary differential equations offer low computational expense, but typically cannot efficiently handle stiff systems. In contrast, implicit methods demand greater expense but offer unconditional stability—as a result, most reactive-flow solvers rely...
    Resource Type:
    Masters Thesis

  • 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