Index Catalog // ScholarsArchive@OSU

Numerical Simulation of a Thouless Pump

Creator:: Wall, Bryce
Abstract:: At the macroscopic scale, we have pumps that use the classical laws of physics to move liquids at a well defined rate. In the microscopic world, physicists are exploring pumps that make use of quantum mechanical behavior to build analogous pumps for quantum particles. The importance of such “quantum pumps”...
Resource Type:: Honors College Thesis
Full Text:: , representing Physics Vrushali Bokil, Committee Member, representing Mathematics Elizabeth Gire, Committee

Transgender and Gender Nonconforming Undergraduate Engineering Students: Perspectives, Resiliency, and Suggestions for Improving Engineering Education

Creator:: Haverkamp, Andrea E.
Abstract:: Gender has been the subject of study in engineering education and science social research for decades. However, little attention has been given to transgender and gender nonconforming (TGNC) experiences or perspectives. The role of cisgender or gender conforming status has not been investigated nor considered in prevailing frameworks of gender...
Resource Type:: Dissertation

Music Generation and Evaluation Using R

Creator:: Lanz, Andrea L.
Abstract:: The main goal of this project is to implement an algorithmic music composition procedure and present all procedures and results in a reproducible fashion by creating a web application produced by R. To approach the implementation of the algorithmic composition of music, we start by exploring various models, but ultimately...
Resource Type:: Honors College Thesis
Full Text:: APPROVED: Charlotte Wickham, Mentor, representing Statistics Vrushali Bokil, Committee Member

Polynomial Chaos Expansions for Random Ordinary Differential Equations

Creator:: McKenzie, Brian
Abstract:: We consider numerical methods for finding approximate solutions to Ordinary Differential Equations (ODEs) with parameters distributed with some probability by the Generalized Polynomial Chaos (GPC) approach. In particular, we consider those with forcing functions that have a random parameter in both the scalar and vector case. We then consider linear...
Resource Type:: Capstone Project
Full Text:: greatly. I also wish to express my gratitude to my committee members Dr. Vrushali Bokil and Dr. Malgorzata

Characterizing Microplastic Ingestion in Black Rockfish (Sebastes melanops) along the Oregon Coast

Creator:: Lasdin, Katherine S.
Abstract:: Microplastics (<5mm diameter) are present in a considerable number of marine and aquatic species. Understanding which species, the global spatial distribution, and what quantities of microplastics are present is extremely important for understanding the potential impacts they could have on recreationally important organisms and for the assessment of risk. We...
Resource Type:: Masters Thesis
Full Text:: to thank my co- advisor, Scott Heppell, and my committee members, Dr. Stacey Harper, Dr. Vrushali

Modeling the Dynamics of Vector–host Interactions in Avian Communities: Eastern Equine Encephalitis Virus as a Model System

Creator:: Muller, Timothy
Abstract:: Understanding the dynamics of seasonal epizootics of vector-borne pathogens infecting multiple host species presents several challenges. The transmission potential of competent hosts depends on factors influencing the contact rate between hosts and vectors. Feeding preferences of vectors can determine which host species drive the prevalence of infection throughout the overall...
Resource Type:: Masters Thesis
Full Text:: committee: Dr. Anna Jolles, Dr. Vrushali Bokil, and Dr. Patrick De Leenheer, for their insightful comments

A Ross-Macdonald Model with Vector Demography

Creator:: Reyes Grimaldo, Ricardo Noe Gerardo
Abstract:: Malaria is a vector-borne disease that has affected humans and other animals for a long time and which has shown high prevalence among different populations. During the beginning of the 20th century, Sir Ronald Ross and George Macdonald developed a model that represents the spread of malaria through the interaction...
Resource Type:: Masters Thesis
Full Text:: thank the members of my thesis committee, Dr. Vrushali A. Bokil, Dr. Yevgeniy Kovchegov, and Dr. Mark

Modeling of Power Efficiency in a Magnetohydrodynamic Generator

Creator:: Redle, Michael T.
Abstract:: The introduction of an Magnetohydrodynamic (MHD) generator in coal or natural gas energy plants could significantly increase the efficiency by converting kinetic and thermal energy of the combustion exhaust to electrical energy by the generation of a Faraday and Hall current. The traditional MHD system was transformed into a simplified...
Resource Type:: Honors College Thesis
Full Text:: , Mentor, representing the Department of Mathematics Vrushali A. Bokil, Committee Member, representing the

Simulator for optimizing performance and power of embedded multicore processors

Creator:: Goska, Benjamin J.
Abstract:: This work presents improvements to a multi-core performance/power simulator. The improvements which include updated power models, voltage scaling aware models, and an application specific benchmark, are done to increase the accuracy of power models under voltage and frequency scaling. Improvements to the simulator enable more accurate design space exploration for...
Resource Type:: Masters Thesis
Full Text:: committee: Roger Traylor and Dr. Vrushali Bokil. CONTRIBUTION OF AUTHORS Ryan Albright and Thomas

Optimization under Uncertainty of a Magnetohydrodynamics Generator

Creator:: Rajbhandari, Evan
Abstract:: Within this dissertation, we develop tools and techniques to demonstrate the feasibility of real-time optimization of a magnetohydrodynamics generator. To ease computational complexity, we work on the kinematic magnetohydrodynamic system, prescribing the ﬂuid-ﬂow and model the material response of the system through an updated Generalized Ohm’s law. We focus on...
Resource Type:: Dissertation

Magnetic Properties of Polymer Nanocomposite Materials Prepared using Multi Jet Fusion 3D Printing Methods

Creator:: Cannamela, Madeleine G.
Abstract:: The goal of this research was to explore if an inkjet 3D printing technology, known as Multi Jet Fusion (MJF), could be used to fabricate magnetic polymer nanocomposites with systematically varied volume fractions of magnetic nanoparticles. Soft magnetic nanoparticles were chosen because of their applications in communications technologies and other...
Resource Type:: Masters Thesis
Full Text:: Dr. Oleh Taratula, Dr. Skip Rochefort, Dr. Megumi Kawasaki and Dr. Vrushali Bokil for your time

Modelling Development of Opinion Matrices Over Time

Creator:: Oostrom, Martijn L.
Abstract:: Given an initial opinion matrix in which every member of a population gives an opinion score of all the members in a population, natural questions to ask could be regarding what happens to those opinions over time, both in forward time and in backward time. While what happens over time...
Resource Type:: Masters Thesis

Stage-structured interactions and their consequences across levels of biological organization

Creator:: Segui, Leah Mupas
Abstract:: A central challenge for ecology is to understand the dynamic nature of species interactions. A classic approach to community ecology assumes that individuals within a species are functionally identical and that consumer-resource dynamics can be predicted solely by using species abundances. However, one species can consist of multiple functional groups,...
Resource Type:: Dissertation
Full Text:: connecting me with Dave and Doug, which was a fantastic introduction to freshwater systems. Vrushali Bokil

Numerical Analysis of a System of Parabolic Variational Inequalities with Application to Biofilm Growth

Creator:: Alhammali, Azhar S. A.
Abstract:: In this work we consider a mathematical and computational model for biofilm growth and nutrient utilization. In particular, we are interested in a model appropriate at a scale of interface. The model is a system of two coupled nonlinear diffusion--reaction partial differential equations (PDEs). One of these PDEs is subject...
Resource Type:: Dissertation
Full Text:: committee members Dr. Ralph Showalter, Dr. Vrushali Bokil, Dr. Elaine Cozzi, and Dr. Katherine R

Swept time-space domain decomposition on GPUs and heterogeneous computing systems

Creator:: Magee, Daniel J.
Abstract:: Modern scientific and engineering problems often require simulations with a level of resolution difficult to achieve in reasonable amounts of time—even in effectively parallelized programs. Therefore, applications that exploit high performance computing (HPC) systems have become invaluable in academia and industry over the past two decades. Addressing the questions that...
Resource Type:: Masters Thesis

Optimizing HIV Treatment in Resource-Limited Settings

Creator:: Akudibillah, Gordon Amed
Abstract:: Apart from the traditional role of preventing progression from HIV to AIDS, antiretroviral drug therapy (ART) has an additional benefit of substantially reducing infectiousness, making them potentially an important strategy in the fight against HIV. Recent advances in drug therapy have also seen the use of antiretroviral drugs as a...
Resource Type:: Dissertation
Full Text:: valuable support. To my committee members, Dr. John Bolte, Dr. Charlotte Wickham, Dr. Vrushali Bokil and

Multiscale modeling of two-phase flows in microarchitectures with microfeatures

Creator:: Truszkowska, Agnieszka
Abstract:: Two-phase flows in microtechnology based devices are purposefully present in multiphase reactors, phase separators, analytical devices and others. Two-phase flows can also be an undesirable side effect occurring during operation due to phase transitions or, more commonly, introduction of surrounding air through equipment gaps and with process feed. In both...
Resource Type:: Dissertation
Full Text:: . Sourabh Apte, Dr. Vrushali Bokil, Dr. Michael Milota, and Dr. Karl Schilke for their support. Lastly

Complexity in host-pathogen dynamics : dispersal uncertainties, metapopulation persistence and the role of a changing climate

Creator:: Xie, Yang
Abstract:: Emerging infectious diseases impact both human and wildlife populations. Infectious agents, in particular the aquatic fungus Batrachochytrium dendrobatidis (chytrid), have an influential role in driving global amphibian population declines. The emergence of the chytrid fungus has aspects of both geographic spread as well as climate shifts altering environmental conditions and...
Resource Type:: Dissertation

Gaussian random fields related to Lévy's Brownian motion : representations and expansions, Gaussian random fields related to Levy's Brownian motion : representations and expansions

Creator:: Rode, Erica S.
Abstract:: This dissertation examines properties and representations of several isotropic Gaussian random fields in the unit ball in d-dimensional Euclidean space. First we consider Lévy's Brownian motion. We use an integral representation for the covariance function to find a new expansion for Lévy's Brownian motion as an infinite linear combination of...
Resource Type:: Dissertation

Modeling, control, and estimation of flexible, aerodynamic structures

Creator:: Ray, Cody W.
Abstract:: Engineers have long been inspired by nature's flyers. Such animals navigate complex environments gracefully and efficiently by using a variety of evolutionary adaptations for high-performance flight. Biologists have discovered a variety of sensory adaptations that provide flow state feedback and allow flying animals to feel their way through flight. A...
Resource Type:: Dissertation
Full Text:: , Vrushali Bokil, Nathan Gibson, Ben Dickinson, and John Singler. The author thanks you all and hopes to be

The influence of biophysical feedbacks and species interactions on grass invasions and coastal dune morphology in the Pacific Northwest, USA

Creator:: Zarnetske, Phoebe Lehmann
Abstract:: Biological invasions provide a unique opportunity to study the mechanisms that regulate community composition and ecosystem function. Invasive species that are also ecosystem engineers can substantially alter physical features in an environment, and this can lead to cascading effects on the biological community. Aquatic-terrestrial interface ecosystems are excellent systems to...
Resource Type:: Dissertation
Full Text:: , Timothy Maddux, Dan Cox, Vrushali Bokil, Tarik Gouhier, and Wichai Pattanapol. I would also like to

Hydrological and biogeochemical dynamics of nitrate production and removal at the stream – ground water interface

Creator:: Zarnetske, Jay P.
Abstract:: The feedbacks between hydrology and biogeochemical cycling of nitrogen (N) are of critical importance to global bioavailable N budgets. Human activities are dramatically increasing the amount of bioavailable N in the biosphere, which is causing increasingly frequent and severe impacts on ecosystems and human welfare. Streams are important features in...
Resource Type:: Dissertation
Full Text:: also to my committee members, Stan Gregory and Vrushali Bokil, who have added breadth and strength to

Skew diffusion with drift : a new class of stochastic processes with applications to parabolic equations with piecewise smooth coefficients

Creator:: Arachchi Appuhamillage, Thilanka Iresh
Abstract:: This thesis consists of three subsequent parts addressing the applications of stochastic processes to the analysis and solutions of parabolic equations with discontinuous coefficients that are of mathematical interest. The first two parts consist of three manuscripts, in which we analyze solutions of Fickian convection dispersion equations with discontinuous coefficients...
Resource Type:: Dissertation
Full Text:: succeeded. Many special thanks to Professors Edward C. Waymire and Vrushali A. Bokil for their

Two-grid a-priori and a-posteriori error analysis for coupled elliptic and parabolic systems with applications to flow and transport problems

Creator:: Klein, Viviane
Abstract:: We develop several a-priori and a-posteriori error estimates for two-grid finite element discretization of coupled elliptic and parabolic systems with a set of parameters P. We present numerical results that verify the convergence order of the numerical schemes predicted by the a-priori estimates. We present numerical results that verify the...
Resource Type:: Dissertation

Branching Brownian Motion with One Absorbing and One Reflecting Boundary

Creator:: Felder, William F.
Abstract:: In this work we will analyze branching Brownian motion on a finite interval with oneabsorbing and one reflecting boundary, having constant drift rate toward the absorbingboundary. Similar processes have been considered by Kesten ([12]), and more recently byHarris, Hesse, and Kyprianou ([11]). The current offering is motivated largely by the...
Resource Type:: Dissertation

Mathematical treatment and simulation of methane hydrates and adsorption models

Creator:: Medina, Francis Patricia
Abstract:: In this dissertation we develop mathematical treatment for two important applications: (i) evolution of methane in coalbeds with the associated phenomena of adsorption, and (ii) formation of methane hydrates in seabed. We use simplified models for (i) and (ii) since we are more interested in qualitative properties of the solutions...
Resource Type:: Dissertation

A heterogeneous flow numerical model based on domain decomposition methods

Creator:: Zhang, Yi
Abstract:: In this study, a heterogeneous flow model is proposed based on a non-overlapping domain decomposition method. The model combines potential flow and incompressible viscous flow. Both flow domains contain a free surface boundary. The heterogeneous domain decomposition method is formulated following the Dirichlet-Neumann method. Both an implicit scheme and an...
Resource Type:: Masters Thesis

Branching random walk and probability problems from physics and biology

Creator:: Johnson, Torrey
Abstract:: This thesis studies connections between disorder type in tree polymers and the branching random walk and presents an application to swarm site-selection. Chapter two extends results on tree polymers in the infinite volume limit to critical strong disorder. Almost sure (a.s.) convergence in the infinite volume limit is obtained for...
Resource Type:: Dissertation

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