Index Catalog // ScholarsArchive@OSU

Application of a Modified Microdosimetric-Kinetic Model to Analyze Cell Killing in Determination of the Optimal Particle for Light Ion Therapy

Creator:: Butkus, Michael P.
Abstract:: Ion therapy has long been investigated as a potential modality to improve cancer treatments beyond what is currently feasible with photon irradiations. Ions offer both a physical and biological advantage over photons. The physical advantages are well understood, ions deposit their maximum dose at defined penetration depths, allowing for minimal...
Resource Type:: Dissertation
Full Text:: Michael P. Butkus for the degree of Doctor of Philosophy in Medical Physics presented on April 25, 2018

Collective Aquifer Governance: It’s the Water, and a “Hole” Lot More

Creator:: Wiley, Jakob Stevan
Abstract:: Aquifers are a whole lot more than groundwater. Aquifers are composed of many kinds of different resources, including storage space, geothermal energy, surface interactions, and various minerals. However, unlike these resources, groundwater is treated as something different. The transition from groundwater management to groundwater governance expanded the role of social...
Resource Type:: Capstone Project
Full Text:: Abstract Approved: W. Todd Jarvis Aquifers are a whole lot more than groundwater. Aquifers

Binary stochastic media transport : a coupled mesh based method

Creator:: Barnett, Nathan A.
Abstract:: Transport in a binary stochastic media has been an area of interest for many applications over the past three decades. Many different methods have been attempted, most based on the Levermore-Pomraning coupled transport model. However, this method has never been able to correctly solve problems where a large amount of...
Resource Type:: Masters Thesis
Full Text:: : __________________________________________________________________ Todd S. Palmer Transport in a binary stochastic media has been an area of interest for many

Transcriptomic analysis using high-throughput sequencing and DNA microarrays

Creator:: Fox, Samuel E.
Abstract:: Transcriptomics and gene expression profiling enables the elucidation of the genetic response of an organism to various environmental cues. Transcriptomics enables the deciphering of differences between two closely related organisms to the same environment and in contrast, enables the elucidation of genetic responses of the same organism to different environmental...
Resource Type:: Dissertation
Full Text:: microarrays. Abstract approved: Todd C. Mockler Transcriptomics and gene expression

Pair production treatments for deterministic pulse-height distribution simulations

Creator:: MacQuigg, Michael R.
Abstract:: This thesis presents methods for treating annihilation photon pairs in deterministic pulse height distribution (PHD) simulations. The methods are applied in PHD simulations for monoenergtic sources of 1.6 and 2.6 MeV photons incident on 5 and 10 cm 1-D slabs of germanium, sodium iodide, and lead and the results are...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Michael R. MacQuigg for the

Analysis of the method of tubes characteristic schemes in the thick diffusive limit

Creator:: Rising, Michael E.
Abstract:: Characteristic methods are widely known to be very accurate approaches to the solution of numerical transport problems. These methods are most often used for neutron transport applications (i.e. lattice physics calculations) where spatial cells are of intermediate optical thickness (O(1) - O(100) mean free paths, depending on the energy group)...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Michael E. Rising for the degree of

An ecosystem service approach to inform reactive nitrogen management in the lower Yakima River Basin, Washington

Creator:: Crowell, Morgan
Abstract:: Spatially explicit ecosystem service valuation (ESV) allows for the identification of the location and magnitude of services provided by natural ecosystems to human activities along with a measure of their significance based upon economic valuation. While ESV has been used to provide new insight into land use management, few studies...
Resource Type:: Masters Thesis
Full Text:: Lower Yakima River Basin, Washington. Abstract approved: Michael E. Campana Spatially explicit

Mahler's order functions and algebraic approximation of p-adic numbers

Creator:: Dietel, Brian Christopher
Abstract:: If P is an integer polynomial denote the degree of P by ∂(P) and let H(P) be the maximum of the absolute value of the coefficients of P. Define Λ(P)=2[superscript ∂(P)]H(P) and for a fixed prime p let C[subscript p] denote the completion of the algebraic closure of the p-adic...
Resource Type:: Dissertation
Full Text:: Order Functions and Algebraic Approximation of p-adic Numbers Abstract approved: Mary E. Flahive If P

Strength and Composition of Willamette Valley Cob: An Earthen Building Material

Creator:: Pullen, Quinn M.
Abstract:: Cob is an earthen building material composed of sand, clay and straw. Though cob homes are presently being built in the Pacific Northwest, there is no applicable building code for this material. The purpose of this study is to establish estimates for the major engineering parameters, including both average values...
Resource Type:: Honors College Thesis
Full Text:: Material. Abstract approved: _____________________________________________________ Todd

Applying Machine Learning Algorithms to Identify Problematic Nuclear Data within Nuclear Transport Simulations

Creator:: Grechanuk, Pavel A.
Abstract:: The primary goal of this dissertation is to improve the quality of nuclear data available to the nuclear science community. We propose to accomplish this by applying machine learning algorithms to the large number of available benchmark experiments and simulations, with the goal of determining which nuclear data have strong...
Resource Type:: Dissertation
Full Text:: Safety Pavel A. Grechanuk, Michael E. Rising, Todd. S. Palmer Manuscript published in Journal of

A Study of Artificial Neural Networks for the Solution of Multi-group Slab Geometry Discrete Ordinates Transport Problems with Material Heterogeneity

Creator:: Kumar, Ravi
Abstract:: In this thesis, we expand the scope of a previously introduced Artificial Neural Network (ANN) method to solve the slab-geometry discrete ordinates (S$_N$) neutron transport equations. Specifically, we extend the method to energy-dependent (multi-group) fixed source problems involving heterogeneous media and more general boundary conditions - vacuum and incident flux...
Resource Type:: Masters Thesis
Full Text:: Material Heterogeneity Abstract approved: Todd S. Palmer In this thesis, we expand the scope of a

A Review of Water Banking in State Legislation of the Western United States

Creator:: Brennan, Sarah E.
Abstract:: Among the suite of water resources management strategies, water banking can be a tool for water resource management in areas with high water demands or localized water scarcity. This research aims to further the understanding of water banking by conducting a review and analysis of relevant state legislation. This research...
Resource Type:: Masters Thesis
Full Text:: approved: ______________________________________________________ W. Todd Jarvis Among the suite of

Investigation of the behavior of diagonally cracked full-scale CRC deck-girders injected with epoxy resin and subjected to axial tension

Creator:: Smith, Matthew T. (Matthew Todd)
Abstract:: Article 1: Behavior of Epoxy Injected Diagonally Cracked Full-Scale CRC Deck-Girders. Many cast-in place reinforced concrete deck-girder bridges (RCDG) remain in the national inventory and exhibit diagonal cracking. Epoxy injection has been in use for several decades as a method for sealing diagonal cracks, but the effects on girder behavior...
Resource Type:: Masters Thesis
Full Text:: Concrete Beams,” Oregon Department of Transportation, Salem, OR, 2003, 19 pp. Popov, E. P., and

Studies on the centromere-specific histone, CenH3, of Neurospora crassa and related ascomycetes

Creator:: Phatale, Pallavi A.
Abstract:: In eukaryotes, the defined loci on each chromosome, the centromeres, accomplish the critical task of correct cell division. In some organisms, centromeres are composed of a euchromatic central core region embedded in a stretch of heterochromatin and the inheritance and maintenance of centromeres are controlled by dynamic epigenetic phenomena. Although...
Resource Type:: Dissertation
Full Text:: approved: Michael Freitag In eukaryotes, the defined loci on each chromosome, the centromeres

Characterization of Neurospora crassa and Fusarium graminearum mutants defective in repeat-induced point mutation

Creator:: Pomraning, Kyle R.
Abstract:: Mutation of repetitive DNA by repeat-induced point mutation (RIP) is a process that occurs in many filamentous fungi of the Ascomycota during the sexual cycle. Concurrently, direct DNA repeats are often deleted by homologous recombination at high frequency during the sexual cycle. Thus, the processes of RIP and deletion compete...
Resource Type:: Dissertation
Full Text:: Defective in Repeat-induced Point Mutation Abstract approved: Michael Freitag Mutation

The role of bedrock groundwater in rainfall-runoff response at hillslope and catchment scales

Creator:: Gabrielli, Christopher P.
Abstract:: Bedrock groundwater dynamics in headwater catchments are poorly understood and poorly characterized. Direct hydrometric measurements have been limited due to the logistical challenges associated with drilling through hard rock in steep, remote and often roadless terrain. Here we develop and use an inexpensive, portable bedrock drilling system to explore bedrock...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF Christopher P. Gabrielli for the degree of Master of Science in Water

Water management decentralization in rural Honduras

Creator:: Sano, Yoshiko
Abstract:: Numerous water supply systems and community based water boards have been created with the aid of international organizations and NGOs in developing countries. These water systems have great potential to improve people’s social life and health in these countries. However, in reality, these water systems are often not effectively managed;...
Resource Type:: Masters Thesis
Full Text:: approved: ________________________________________________________________ Michael E. Campana

Fourier Analysis and Equidistribution on the p-adic Integers

Creator:: Somasunderam, Naveen
Abstract:: In this dissertation, we use Fourier-analytic methods to study questions of equidistribution on the compact abelian group Zp of p-adic integers. In particu- lar, we prove a LeVeque-type Fourier analytic upper bound on the discrepancy of sequences. We establish p-adic analogues of the classical Dirichlet and Fejér kernels on R/Z,...
Resource Type:: Dissertation
Full Text:: Analysis and Equidistribution on the p-adic Integers Abstract approved: Clayton J. Petsche In this

Quantification of Ecological Change Using Repeat Photography and Ground Based Lidar

Creator:: Batchelor, Jonathan L.
Abstract:: Remote sensing techniques have long been useful in quantifying changes in ecosystems and the field of remote sensing is constantly evolving to better assess and describe changes, both spatially and temporally. In this thesis I explored the novel use of two remote sensing methods to quantify ecosystems; repeat photograph to...
Resource Type:: Masters Thesis
Full Text:: . Ripple Todd M. Wilson Remote sensing techniques have long been useful in

Classification Modeling of Nuclear Power Plant Outage Severities with Complement Naïve Bayes and Bidirectional Encoder Representations from Transformers

Creator:: Castillo, Michael A.
Abstract:: Low-level nuclear power plant outages in the United States can lead to unanticipated costs, potentially compromising the expected operation lifetime of the plant. Nuclear power plants are complex systems of interfacing components and highly regulated processes. This inherent complexity makes predicting outages from system dependencies very challenging. When outages do...
Resource Type:: Masters Thesis
Full Text:: Michael A. Castillo for the degree of Master of Science in Nuclear Engineering presented on December 6

Structure-Property Relationships of Disordered Electronic Materials : From Crystalline to Amorphous

Creator:: Surta, Todd Wesley, Jr.
Abstract:: Two perovskite materials (Bi0.5(A)0.5)(Sc0.5Nb0.5)O3, where A = K+ and Na+ were synthesized phase pure for the first time. Their structures were determined by indexing synchrotron X-ray diffraction data and subsequent combined Rietveld refinement on neutron and synchrotron X-ray diffraction data revealing significant disorder on the A-sites of these materials. A...
Resource Type:: Dissertation
Full Text:: ABSTRACT OF THE DISSERTATION OF Todd Wesley Surta Jr. for the degree of Doctor of Philosophy in

Discrete Ordinates Radiation Transport using High-Order Finite Element Spatial Discretizations on Meshes with Curved Surfaces

Creator:: Woods, Douglas N.
Abstract:: We spatially discretize the Sn transport equation using the high-order (HO) discontinuous finite element method (DFEM) on HO meshes. Previous work provided a proof-of-concept for this spatial discretization method in X-Y geometry. Included in the present work, we derive a spatial discretization for the Sn transport equation in both X-Y...
Resource Type:: Dissertation
Full Text:: Surfaces Abstract approved: Todd S. Palmer We spatially discretize the SN transport equation using the

Effect of constituent materials and curing methods on the abrasion resistance and durability of high performance concrete for pre-cast pre-stressed bridge deck slabs

Creator:: Keshari, Shweta
Abstract:: This thesis is the consequence of a research effort undertaken by the School of Civil and Construction Engineering at Oregon State University and funded by the Oregon Department of Transportation (ODOT) and the Federal Highway Administration (FHWA). The principal objective of the effort was to reduce the life cycle cost...
Resource Type:: Masters Thesis
Full Text:: : ________________________________________ Todd V. Scholz This thesis is the consequence of a research effort undertaken by the School of

Genomic Resource Development for European Hazelnut (Corylus avellana L.)

Creator:: Rowley, Erik R.
Abstract:: European hazelnut (Corylus avellana L.) is an important crop Oregon's Willamette Valley, producing 99% of the hazelnuts grown in North America and brings over US $60 million dollars to the region annually. Hazelnuts are rich in fiber and vitamins, as well in demand by consumers due to their popularity as...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ Todd C. Mockler European hazelnut (Corylus avellana L.) is an important crop Oregon’s

Evaluating preconditioning options for the Jacobian-Free Newton Krylov Method applied to radiative transfer with matter coupling

Creator:: Myers, Nicholas T.
Abstract:: The objective of this thesis was to investigate the use of the Jacobian Free Newton Krylov Method (JFNK) with physics based preconditioning for solving coupled radiative transport and material energy balance. Modeling of these physics is important in inertial confinement fusion and other high energy density systems. In this thesis,...
Resource Type:: Masters Thesis
Full Text:: Coupling Abstract approved: Todd S. Palmer The objective of this thesis was to investigate the use of

Collaborative assessment and management of transboundary aquifers in North America

Creator:: Alvarez Tostado Delgado, Pablo
Abstract:: The Law of Transboundary Aquifers, introduced to the United Nations General Assembly in December 2008, encourages nations to make multilateral arrangements for the proper management of transboundary aquifers. This study seeks to answer the question: “What are the main challenges for successful collaboration in assessing and managing Transboundary Aquifer Systems...
Resource Type:: Masters Thesis
Full Text:: approved: ____________________________________________________________________ William Todd Jarvis

Assessing Several Modeling Approaches in Depletion Studies of a TRISO-Fueled Microreactor

Creator:: Hoffman, Keenan J.
Abstract:: The impact of MCNP6 depletion resolution on core lifetime is examined in the context of the Snowflake microreactor with explicit TRISO fuel. The change in core lifetime and iso- tope mass as a result of different tracked isotopes, timesteps, and spatial regions is discussed. Calculation speed of a prototype MCNP...
Resource Type:: Masters Thesis
Full Text:: approved: Todd S. Palmer The impact of MCNP6 depletion resolution on core lifetime is examined in the

A General Purpose Agent-Based Blackboard Optimization Method Applied to Sodium Fast Reactor Design and Analysis

Creator:: Stewart, Ryan H.
Abstract:: We present a novel multi-objective optimization methodology built upon a multi-agent blackboard framework. This multi-agent blackboard system (MABS) synthesizes blackboard architectures, multi-agent environments, and optimization theory. The blackboard architecture creates the framework for initializing, storing, and solving a multi-objective optimization problem. Multiple agents allow for an optimization problem to be...
Resource Type:: Dissertation
Full Text:: Abstract approved: Todd S. Palmer We present a novel multi-objective optimization methodology built upon

Saving Darlingtonia: Pumping, Pollution, Public Participation, and Perceived Impacts to a Carnivorous Pitcher Plant: Darlingtonia State Natural Site, Florence, Oregon

Creator:: Grandy, Trevor J.
Abstract:: Oregon’s coast draws millions of visitors every year to witness the natural wonders of one the world’s most vibrant and publicly accessible areas where mountain forests meet sandy beaches and the sea. Communities along the Oregon coast are restricted to narrow stretches of developable land overlying sand deposits between the...
Resource Type:: Masters Thesis
Full Text:: , Oregon Abstract approved: ______________________________________________________ W. Todd

Taming the Tumalo : A Damned Dam Repurposed for Recharge

Creator:: Harpham, Kelsey
Abstract:: The Tumalo Project at Tumalo Reservoir in Central Oregon was proclaimed a failure almost as soon as it was completed. As the reservoir filled with water diverted from Tumalo creek in the spring of 1915, sinkholes developed in the reservoir floor and every last drop of captured water disappeared into...
Resource Type:: Masters Thesis
Full Text:: : Taming the Tumalo: A Damned Dam Repurposed for Recharge Abstract approved: William Todd Jarvis The

Predicting antineutrino source terms from a high temperature gas reactor

Creator:: Shaughnessy, Andra L.
Abstract:: Since the 1990s, researchers around the world have been creating antineutrino detectors for monitoring power reactors. These detectors have been deployed at light water reactors and are able to determine power levels and burn up throughout a fuel cycle. This technology could allow the IAEA to monitor LWRs remotely and...
Resource Type:: Masters Thesis
Full Text:: Antineutrino Source Terms from a High Temperature Gas Reactor Abstract approved: Todd S. Palmer Since the

Design and analysis of a nuclear reactor core for innovative small light water reactors

Creator:: Soldatov, Alexey I.
Abstract:: In order to address the energy needs of developing countries and remote communities, Oregon State University has proposed the Multi-Application Small Light Water Reactor (MASLWR) design. In order to achieve five years of operation without refueling, use of 8% enriched fuel is necessary. This dissertation is focused on core design...
Resource Type:: Dissertation
Full Text:: approved: Todd S. Palmer In order to address the energy needs of developing countries and

Development of a synoptic map-pattern climatology to supplement current weather forecasting methods

Creator:: Frey, Melissa D. (Melissa Dawn)
Abstract:: Many meteorologists rely heavily on their experience of past weather events to supplement their forecasting tools, such as using past experience to help decide between conflicting numerical weather prediction models. Experiential knowledge is an important piece of forecasting, however it is highly subjective and variable from one forecaster to another....
Resource Type:: Masters Thesis
Full Text:: Methods Abstract approved: ______________________________________________ Michael H

Genomics of migration : from marine distributions of salmonids to mechanisms of olfactory and magnetic cue perception for natal homing

Creator:: Bellinger, M. Renee
Abstract:: Substantial scientific investment has been directed towards understanding factors that influence distribution patterns and animals' remarkable ability for precise orientation and navigation, yet fundamental gaps in our knowledge remain. In my dissertation, I applied emerging genetic technologies to conduct a top-down and bottom-up investigation of animal movement and cue perception....
Resource Type:: Dissertation
Full Text:: Michael A. Banks Substantial scientific investment has been directed towards understanding

Assessing Managed Aquifer Recharge Potential: Regional to Local Evaluation

Creator:: Gibson, Maria
Abstract:: Although surface water constitutes less than 1.5% of freshwater supply, historical development of surface water sources continues to mark the landscape. However, over- exploitation of groundwater is now at its highest, and 25% of the world’s 1.7 billion population live in water scare regions. As glaciers and snowpack disappear due...
Resource Type:: Dissertation
Full Text:: Evaluation Abstract approved: ______________________________________________________ Michael E

Personalizing machine learning systems with explanatory debugging

Creator:: Kulesza, Todd
Abstract:: How can end users efficiently influence the predictions that machine learning systems make on their behalf? Traditional systems rely on users to provide examples of how they want the learning system to behave, but this is not always practical for the user, nor efficient for the learning system. This dissertation...
Resource Type:: Dissertation
Full Text:: Debugging AN ABSTRACT OF THE DISSERTATION OF Todd Kulesza for the degree of Doctor of Philosophy in

Predicting dose and cell survival distributions for brachytherapy sources

Creator:: Stringham, Michael J.
Abstract:: The focus of this thesis is to determine the biological impact of dose from brachytherapy sources commonly used in cancer treatment. To achieve this goal, the Monte Carlo code PENELOPE was used to simulate point sources of four different isotopes (¹⁰³Pd, ¹²⁵I, ¹³⁷Cs, and ⁹⁰Sr) in an infinite medium of...
Resource Type:: Masters Thesis

Characterization of the onset of charged particle equilibrium for photon dose to skin

Creator:: Ryan, Michael C.
Abstract:: In the U.S., the Nuclear Regulatory Commission (NRC) is responsible for setting annual dose limits. For cases of hot particle contamination these limits are set at depths in skin of 7 mg/cm², 300 mg/cm², and 1000 mg/cm². However, at such shallow depths, the lack of charged particle equilibrium (CPE) precludes...
Resource Type:: Masters Thesis
Full Text:: ! ! ! OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO! ./01234!(5!'627E!"B;19:! ! "(Z#)]P,Le,.,#&%! ! ! -!Q9B45!+2KJ6E!+/=436E

Alkali-silica reaction in concrete containing recycled concrete aggregates

Creator:: Adams, Matthew P.
Abstract:: Using recycled concrete aggregate (RCA) as a replacement for natural aggregate in new concrete is a promising way to increase the overall sustainability of new concrete. This has been hindered, however, by a general perception that RCA is a sub-standard material due to the lack of technical guidance, specifically related...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF Matthew P. Adams for the degree of Master of Science in Civil Engineering

Hydrologic and Land Cover Effects on Sources and Fate of In-Stream Fluorescent Dissolved Organic Matter

Creator:: Lee, Baek Soo P.
Abstract:: Dissolved organic matter (DOM) is a critical component of the carbon cycle linking terrestrial and aquatic ecosystems. Although many factors influence DOM fluxes and quality in rivers, controls on DOM compositions in catchments of the western U.S. are poorly understood. UV and fluorescent spectroscopy is a simpler, faster, and less...
Resource Type:: Dissertation
Full Text:: thank the Institute for Water and Watersheds especially Dr. Todd Jarvis, Dr. Michael Campana, and the

Algorithms for massive biological datasets

Creator:: Bryant, Douglas W. (Douglas Wesley)
Abstract:: Within the past several years the technology of high-throughput sequencing has transformed the study of biology by offering unprecedented access to life's fundamental building block, DNA. With this transformation's potential a host of brand-new challenges have emerged, many of which lend themselves to being solved through computational methods. From de...
Resource Type:: Dissertation
Full Text:: : Algorithms for Massive Biological Datasets Abstract approved: Weng-Keen Wong Todd C. Mockler Within the

Understanding Software Development and Testing Practices

Creator:: Hilton, Michael
Abstract:: A bad software development process leads to wasted effort and inferior products. In order to improve a software process, it must be first understood. In this work I focus on understanding software processes. The first process we seek to understand is Continuous Integration (CI). CI systems automate the compilation, building,...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Michael Hilton for the

Downstream Rearing Chinook Salmon (Oncorhynchus tshawytscha) in the Upper Mainstem of the John Day River

Creator:: Scheu, Michael P.
Abstract:: Juvenile Chinook Salmon (Oncorhynchus tshawytscha) leave the natal reach at different times and move downstream at different rates which can increase their productivity by allowing them to utilize habitats on different temporal scales and spreading risk of localized stochastic events. This life history diversity can also allow fish to adapt...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Michael Patrick

Benchmarked simulation of antineutrino source terms for light water reactors during normal operation and diversion scenarios

Creator:: Somasundaram, Elanchezhian
Abstract:: Detection of reactor antineutrinos for non-proliferation applications has been researched extensively across the globe and is considered as a potential technology to remotely monitor reactor operations without any intrusions to reactor components. Reactor antineutrino detection experiments have been conducted in the past and have proven successful in detecting the changes...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ Todd S. Palmer Detection of reactor antineutrinos for non-proliferation applications has

To restore what once was : a mixed methods approach to understanding the shoe repair transaction

Creator:: Giulietti, Michael P.
Abstract:: The shoe repair transaction, as it occurs in the 5000 or so remaining shoe repair shops in the United States, is currently unexamined in academic literature for the significance it holds for either shoe repairers or their customers. Making use of both quantitative and qualitative methods of data collection, this...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Michael P

Extending the applicability of implicit Monte Carlo Diffusion : frequency dependence and variance reduction using the difference formulation

Creator:: Cleveland, Mathew A.
Abstract:: The intent of this work is to extend Implicit Monte Carlo Diffusion (IMD)[Gen. 2001] to account for frequency dependence and to incorporate the difference formulation[Szo. 2005] as a source manipulation variance reduction technique. This work shows the derivation of the probabilities and the associated proofs which govern the frequency dependent...
Resource Type:: Masters Thesis
Full Text:: Formulation. Abstract approved: Todd S. Palmer The intent of this work is to extend Implicit Monte Carlo

Street-level Bureaucrat Perceptions Regarding Benefits Migration Between Portland, OR and Vancouver, WA

Creator:: Blakeman, H. G.
Abstract:: This paper explores the perceptions of street-level bureaucrats (SLBs) regarding benefits migration between Portland, OR and Vancouver, WA, specifically how perceptions might impact job performance and policy execution and delivery. To examine this question, interviews were conducted with SLBs in Oregon and Washington. From the interviews, themes concerning the role...
Resource Type:: Capstone Project
Full Text:: : ________________________________________________ Dr. Todd Pugatch, College of Liberal Arts, Committee Chair

Radiative heat transfer in combustion applications : parallel efficiencies of two gas models, turbulent radiation interactions in particulate laden flows, and coarse mesh finite difference acceleration for improved temporal accuracy

Creator:: Cleveland, Mathew A.
Abstract:: We investigate several aspects of the numerical solution of the radiative transfer equation in the context of coal combustion: the parallel efficiency of two commonly used opacity models, the sensitivity of turbulent radiation interaction (TRI) effects to the presence of coal particulate, and an improvement of the order of temporal...
Resource Type:: Dissertation
Full Text:: Accuracy Abstract approved: Todd S. Palmer We investigate several aspects of the numerical solution of

Investigation of a hybrid quasi-diffusion/Monte Carlo method for solving multigroup criticality problems in slab geometry

Creator:: Robinson, Bethany R.
Abstract:: A hybrid Quasi-diffusion/Monte Carlo Method for solving multigroup criticality problems in slab geometry was investigated. Analog Monte Carlo was used to calculate functionals (Eddington Factors) that were then used in solution of the quasi-diffusion equations. The hybrid method was shown to accurately and precisely predict the k-eigenvalue and fission source...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Todd S. Palmer A hybrid Quasi-diffusion/Monte Carlo Method for solving multigroup

Forensic Hydrogeography : Assessing Groundwater Arsenic Concentrations and Testing Methods within the Harney Basin, Oregon

Creator:: Smitherman, Lauren L.
Abstract:: Harney County contains defining characteristics of regions containing arsenic within the groundwater such as its location in the western United States, unique closed basin geography, complex geology, and seasonal groundwater level fluctuations. Confirmation of arsenic concentrations above the Maximum Contaminant Level Drinking Water Standard of 10 μg/L has been observed...
Resource Type:: Masters Thesis
Full Text:: their properties. I would additionally like to acknowledge my advisor Dr. Todd Jarvis, my committee

Simulated antineutrino signatures of nuclear reactors for nonproliferation applications

Creator:: Misner, Alex C.
Abstract:: Antineutrino detectors could provide a valuable addition to current safeguards regimes. Antineutrinos are an attractive emission to monitor due to their low interaction cross-section that prevents them from being shielded and the dependence of their spectrum on the power level and isotopic content of a reactor core. While there are...
Resource Type:: Dissertation
Full Text:: . Abstract approved: _____________________________________________________________________ Todd S

Predicting Thermal Conductivity in Nuclear Fuels using Rattlesnake-Based Deterministic Phonon Transport Simulations

Creator:: Harter, Jackson R.
Abstract:: The Boltzmann transport equation derived in the Self-Adjoint Angular Flux (SAAF) formulation is applied to simulate phonon transport. The neutron transport code Rattlesnake is leveraged in this fashion, slightly modi ed to accept input from variables consistent with phonon transport simulations. Several benchmark problems are modeled to assess the potential...
Resource Type:: Masters Thesis
Full Text:: approved: Todd S. Palmer The Boltzmann transport equation derived in the Self-Adjoint Angular Flux (SAAF

Molybdenum-99 production in the Oregon State TRIGA reactor : analysis of the reactor design using a new LEU target as fuel

Creator:: Hummel, Andrew J.
Abstract:: The most widely used and versatile medical radioisotope today is technetium-99m. Roughly 30 million people depend on this radioisotope for diagnostic procedures each year, and this demand is expected to grow. Although there are numerous ways of procuring this isotope, the most common and most practical, for reasons to be...
Resource Type:: Dissertation
Full Text:: Target as Fuel. Abstract approved: Todd S. Palmer The most widely used and versatile

The Fracker’s Figleaf : Booms and Busts of Sustainable Communities and Cohesive Water Governance

Creator:: Groh, Fred
Abstract:: The Marcellus Shale Natural Gas play in Pennsylvania, since its inception, continues to be a source of contention for multiple Pennsylvania stakeholders. The issues that relate to natural gas extraction have seemingly impacted every community within the Marcellus Shale region in some form. As in most common pool resource...
Resource Type:: Capstone Project
Date Created:
Full Text:: : ___________________________________________________________________ Major Professor – Todd Jarvis, Ph.D. ii

Radiation health and safety of a radioisotope powered micro fuel cell

Creator:: Maloy, Kyle James
Abstract:: Radiation health and safety issues associated with a plutonium-powered radioisotope powered micro fuel cell (RMFC) were evaluated. The RMFC converts water into its component elements by radiolysis and the resultant hydrogen is used to power the fuel cell. This device is under development and is being considered for possible deployment...
Resource Type:: Masters Thesis
Full Text:: . Todd Palmer Radiation health and safety issues associated with a plutonium-powered radioisotope

Oregon Water Atlas : A Digital Collection and Visualization of Oregon’s Water Data

Creator:: Baldrica-Franklin, Gareth
Abstract:: The Oregon Water Atlas is an aggregation and visualization of Oregon’s water data. Multiple government agencies (state and federal) maintain geographic data related to Oregon’s water, and they exist almost exclusively in GIS (geographic information system) formats. Using GIS processing software in conjunction with web design, a wide array of...
Resource Type:: Honors College Thesis
Full Text:: Water Data. Abstract approved:_____________________________________________________ Todd

Solution of the 2D quasi-diffusion low-order equations using a coupled nodal/finite volume discretization in Cartesian and hexagonal geometry

Creator:: Nes, Razvan
Abstract:: An important improvement in the area of reactor core neutronic modeling is the development and use of the methods based on "quasi-diffusion" (QD) low-order equations. This family of methods takes into account the transport exactly using "functionals" computed by solving transport equations, and is amenable to solution with a variety...
Resource Type:: Dissertation
Full Text:: :____________________________________________________ Todd S. Palmer An important improvement in the area of reactor core neutronic modeling is the

Assessing the Quality of Three Dimensional Simplified Spherical Harmonic (SPN) Radiation Transport Solutions to Source Detector Problems

Creator:: Patel, Japan K.
Abstract:: The research objective is to assess the performance of the SPN transport method, with a traditional finite volume spatial discretization in Cartesian geometry, on source detector problems relevant to urban detonation of an improvised nuclear device. In particular, we observe the character of the solution as a function of the...
Resource Type:: Honors College Thesis
Full Text:: Dr. Todd Palmer

Himeradine A : synthetic efforts towards himeradine A and related natural products, a Michael reaction focused approach

Creator:: Collett, Nathan D.
Abstract:: Lycopodium alkaloids have generated enormous amounts of interest from the scientific community, both as synthetic targets and for their medicinal properties. Herein is described work towards a unifying approach to large segments of the Lycopodium family. An organocatalyzed intramolecular heteroatom Michael reaction method, for the construction of piperidine and piperizine...
Resource Type:: Dissertation
Full Text:: Goal. NNH P P O O 2.1.1 2.1.2 ! ! 20! 2.2. Background on Organocatalyzed Heteroatom Michael

Development of organocatalyzed, intramolecular heteroatom Michael addition and application towards alkaloid synthesis

Creator:: Carlson, Erik
Abstract:: Effective methods for the enantiopure formation of substituted piperidine rings are significantly important due to their presence in alkaloid products. A valuable method to form these ring systems would be via an intramolecular heteroatom Michael addition from the corresponding enone or enal. Described herein is a methodolgy that has been...
Resource Type:: Masters Thesis
Full Text:: Organocatalyzed, Intramolecular Heteroatom Michael Addition and Application Towards Alkaloid Synthesis

Impact of yeast present during pre-fermentation cold maceration on Pinot noir wine aroma

Creator:: Hall, Harper L.
Abstract:: This research investigated yeast populations and diversity during pre-fermentation cold maceration and alcoholic fermentation of Vitis vinifera L. cv. Pinot noir grapes from a commercial vineyard (Dayton, OR). Fermentations were conducted at the Oregon State University research winery in 100 L tanks while grapes from the same vineyard lot were...
Resource Type:: Masters Thesis
Full Text:: : ___________________________________________________________ James P. Osborne This research investigated yeast populations and diversity during pre

Advanced Deterministic Phonon Transport Techniques for Predicting Spectral Thermal Conductivity in Homogeneous and Heterogeneous Media

Creator:: Harter, Jackson R.
Abstract:: We present a deterministic spectral method to predict equilibrium temperature distributions, heat flux, and thermal conductivity in homogeneous and heterogeneous media. We solve the Boltzmann transport equation in a second order spatial, self-adjoint angular flux formulation. We implemented this method into the radiation transport code Rattlesnake, built using the MOOSE...
Resource Type:: Dissertation
Full Text:: Heterogeneous Media Abstract approved: Todd S. Palmer We present a deterministic spectral method to predict

The effect of youth participatory evaluation and youth community action training on positive youth development

Creator:: White, David J. (David Joseph)
Abstract:: The bi-directional relationships within the personal and contextual environments of adolescents are critical to the development of adolescents and their transition into adulthood. Opportunities for youth to participate in and provide leadership in meaningful programs, gain life skills, and interact with adults in sustained relationships are key features leading to...
Resource Type:: Dissertation
Full Text:: Training on Positive Youth Development. Abstract approved: Michael Dalton The

Quantum and Classical Simulation of Electronic Transport at the Nanoscale

Creator:: Gruss, Daniel S.
Abstract:: Time-dependent electronic transport is increasingly important to the state-of-the-art device design and fabrication. The development of nanoscale sensing, the harnessing and control of structural fluctuations, and the advancement of next-generation materials all require a treatment of quantum dynamics beyond the level of traditional methods and a more nuanced approach to...
Resource Type:: Dissertation
Full Text:: Transport at the Nanoscale. Abstract approved: Michael P. Zwolak Time-dependent electronic transport is

Perspectives on a Community Forest : A Practice in Nature Writing

Creator:: Hadella, Lucia C.
Abstract:: The McDonald Forest is one of the Oregon State University Research Forests, owned by the College of Forestry and located approximately seven miles northwest of the heart of Corvallis. I took four hikes on the McDonald Forest at four major recreation destinations: Oak Creek, Dimple Hill, Lewisburg Saddle, and Peavy...
Resource Type:: Honors College Thesis
Full Text:: Michael P. Nelson The McDonald Forest is one of the Oregon State University Research Forests, owned

Observing the coastal ocean with HF radar

Creator:: O'Keefe, Sheila
Abstract:: Coastal-based high-frequency (HF) radar systems are an increasingly used tool for measuring surface currents in the coastal ocean. These systems provide a spatial and temporal resolution not achievable with other methods. Standard-range sites typically generate hourly maps of surface currents on a 2km grid extending approximately 50km from shore while...
Resource Type:: Masters Thesis
Full Text:: : ________________________________________________________ P. Michael Kosro Coastal-based high-frequency (HF) radar systems are an increasingly used

Ecological Forestry : A Critical Analysis

Creator:: Batavia, Chelsea
Abstract:: Although science is widely accepted as a fundamental source of information underlying decisions about forest management and conservation, considerably less attention has been paid to the inevitable role that normative values and beliefs play in such decisions. This thesis highlights the normative dimensions of "ecological forestry," a strategy of forest...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ Michael P. Nelson

Development of new analytical methods for aroma analysis and investigation of impact of native yeasts on wine aroma

Creator:: Zhou, Qin
Abstract:: Three analytical methods for determination of aroma compounds in alcoholic beverages were developed and validated. These methods are sensitive and reliable that can be applied to analyze volatile phenols, stale aldehydes as well as some highly volatile aromas in alcoholic beverages. In the first study, an ethylene glycol (EG) polydimethylsiloxane...
Resource Type:: Dissertation
Full Text:: Michael C. Qian Three analytical methods for determination of aroma compounds in alcoholic

Environmental Remote Sensing with Unmanned Aircraft Systems

Creator:: Burnett, Jonathan D.
Abstract:: Small Unmanned Aircraft Systems (sUASs) equipped with optical sensors are capableof remotely sensing landscapes and wildlife at spatial and temporal resolutions that werepreviously inaccessible due to technical and budgetary limitations. Conventional remotesensing and photogrammetric workflows can be applied to the resulting high resolution imageryto facilitate new types of scientific inquiry....
Resource Type:: Dissertation
Full Text:: . Title: Environmental Remote Sensing with Unmanned Aircraft Systems Abstract approved: Michael G. Wing

Effect of sensory properties and health information on consumer acceptance and purchase of colorful fresh market potatoes

Creator:: Wechsler, Linda J.
Abstract:: Potato varieties characterized by non-conventional skin and flesh colors (purple, red, yellow) have the potential to revitalize consumer demand for fresh market potatoes because of their unique appearance and health benefits. Red and purple potatoes contain anthocyanins, which are flavonoids responsible for red, blue, and purple pigments in plants. Yellow...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________________ Michael T. Morrissey Potato varieties characterized by non-conventional skin and flesh

Catch per Unit Effort Associated with Species Regulation Changes in Recreational Fisheries Management

Creator:: Frink, Ashley M.
Abstract:: Recreational fisheries regulations at the state level along the US Atlantic coast are constantly changing to ensure the sustainability of marine fish populations. It is hypothesized that effective management of recreational fishing effort should have a positive impact on fish stocks. Using recreational catch per unit effort (CPUE) as a...
Resource Type:: Capstone Project
Full Text:: fishing on the east coast of the US. ACKNOWLEDGEMENT I would like to thank my advisor, Michael

Understanding policy change in hydropower development by using MSA: A case study of the Nu River Project, China

Creator:: Zhong, Huaxia
Abstract:: In 2003, due to the dramatic growth of economy, China’s National Development and Reform Commission proposed to build 13 dams on the Nu River to fulfill the nation’s rapidly growing demand for hydropower. The 13 dams that comprise the Nu River Project (NRP) are considered among the biggest hydropower development...
Resource Type:: Capstone Project
Full Text:: Alison Johnston, representing Political Science Todd Pugatch, representing Economics I

Transcriptional networks controlled by the fatty acid regulators FAR-1 and FAR-2

Creator:: Bredeweg, Erin L.
Abstract:: Fungi are capable of growth on a wide variety of carbon sources, both living and dead. They can produce an arsenal of enzymes and transporters for harvesting sugars, polysaccharides, amino acids, lipids and micronutrients from their environments [1]. Within the nucleus of a cell, transcription factors (TF) control whether genes...
Resource Type:: Dissertation
Full Text:: :! ! ! ! ! ! ! ! ! ! ! ! ! ! Michael!Freitag! ! Fungi!are!capable!of!growth!on!a!wide!variety!of!carbon!sources,!both!living!and

A case study on the unsustainable use of the High Plains Aquifer

Creator:: Robinson, Kathleen S.
Abstract:: The High Plains Aquifer, a natural resource critical to the United States economic, energy and food security, faces significant sustainability challenges in the coming years. This case study aims to identify the main causes and consequences of unsustainable use of the High Plains Aquifer. The agriculture industry plays the largest...
Resource Type:: Capstone Project
Full Text:: very much to Dr. Carolyn Fonyo and Dr. Todd Jarvis for joining my team near the end and seeing

Advocacy Coalitions, Shifting Priorities and Disability Services: An Integrative and Iterative Approach to Explaining Policy Change

Creator:: Giordono, Leanne S.
Abstract:: Under the label “Supported Employment,” services that promote competitive, integrated employment (CIE) for working-age adult with intellectual and developmental disabilities have been federally funded since the 1980s, alongside other more traditional day habilitation and segregated or sub-minimum wage employment services. However, since the early 2000s, over 30 states have adopted...
Resource Type:: Dissertation
Full Text:: : ________________________________________________ Edward P. Weber Under the label “Supported Employment,” services that promote

Modeling the Oregon State University TRIGA Reactor Using the Attila Three-Dimensional Deterministic Transport Code

Creator:: Keller, S. Todd
Abstract:: Attila is a state-of-the-art radiation transport based code that is efficient, accurate and straightforward to use. Geometric information is input to the code as CAD drawings. Material property information is input as a cross section library. The user has full control over standard transport options and output reports. In phase...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF S. Todd Keller for the degree of Master of Science in Nuclear Engineering

Development of an improved system for Oregon to accurately quantify dense-graded hot mix asphalt pavement density

Creator:: Darra, Suraj
Abstract:: The Oregon Department of Transportation (ODOT) standard specifications require a minimum density for the construction of dense-graded hot mix asphalt (HMA) pavements. Currently, the standard specifications call for density measurements for quality control (QC) and quality assurance (QA) testing to be made using nuclear density gauges that are calibrated using...
Resource Type:: Masters Thesis
Full Text:: Asphalt Pavement Density. Abstract approved: ________________________________________ Dr. Todd V

A Multilevel Nonlinear Projective Method for Circulating Fuel Reactor Kinetics

Creator:: Reynolds, Aaron J.
Abstract:: Circulating fuel reactor (CFR) kinetics are characterized by delayed neutron precursor (DNP) drift in addition to the neutronic and thermal hydraulic phenomena typical of other reactor types. This environment can be computationally challenging to model, given that the multiphysics phenomena generally have non-linear interdependencies requiring the use of iterative solution...
Resource Type:: Dissertation
Full Text:: : Todd S. Palmer Circulating fuel reactor (CFR) kinetics are characterized by delayed neutron pre

Accelerated Deterministic Phonon Transport in Lithium Aluminate with Interfacial Scattering Treatment

Creator:: Whitman, Nicholas H.
Abstract:: We present a method for deterministically solving the consistent temperature and frequency dependent phonon radiative transport problem. We use the single relaxation time (SRT) approximation in the Self-Adjoint Angular Flux (SAAF) form with discrete ordinates (S_N) angular discretization method and continuous finite element method (CFEM) for spatial discretization. Included are...
Resource Type:: Dissertation
Full Text:: ) and Dr. P. Alex Greaney assisted with developing the methodology and editing in Chapter 3. Dr. Todd

Reduced Order Modeling of Radiation Diffusion Kinetics via Proper Generalized Decomposition

Creator:: Alberti, Anthony L.
Abstract:: In this dissertation, we attempt to overcome the "curse of dimensionality" inherent to radiation diffusion kinetics problems by employing a novel reduced order modeling technique known as proper generalized decomposition (PGD). After verifying a proposed PGD algorithm and associated solvers through various tests, we explore its performance for computing reduced-order...
Resource Type:: Dissertation
Full Text:: approved: Todd S. Palmer In this dissertation, we attempt to overcome the “curse of dimensionality

Evaluation of ²³⁵U and ²³⁸U Fast Fission Product Yields from Godiva-IV Burst Irradiation via Gamma Detection

Creator:: Tamashiro, Aaron S.
Abstract:: During the past few decades, the U.S. Department of Energy (DOE) has made significant investments to improve nuclear data libraries, as the quality of this data impacts nearly all analyses of nuclear systems. Nuclear fission product yields are one component of these libraries, and are important for the analysis of...
Resource Type:: Masters Thesis
Full Text:: approved: Todd S. Palmer During the past few decades, the U.S. Department of Energy (DOE) has made

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:: Methods for Representative Nonproliferation Problems. Abstract approved: Todd S. Palmer Adjoint-derived

Nitrate derived from Onsite Wastewater Treatment Systems (NOWTS): A Study of Public Perceptions, Politics, and Perpetual Permitting in the Western US

Creator:: Demaree, David E.
Abstract:: Onsite wastewater treatment systems (OWTS; septic systems, compost toilets, etc.) used to treat wastewater in rural areas have the potential to contaminate groundwater (that is used as a water source) with nitrate. There have been decades of scientific and political conflicts concerning the issue of nitrate from OWTS (NOWTS, pronounced...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ William Todd Jarvis Onsite wastewater treatment systems (OWTS; septic systems, compost

Novel methods for crop load management of pear cultivars in the Pacific Northwest

Creator:: Arrington, Matthew A.
Abstract:: Novel approaches to crop load management of pear orchards in the Pacific Northwest (PNW) are necessary, but will need to vary according to the unique vegetative and reproductive growth habits of the cultivar. 'D'Anjou' is vigorous and non-precocious; thus, strategies to limit vigor and induce early fruiting are required. In...
Resource Type:: Masters Thesis
Full Text:: fruit weight was often reduced. Reduced fruit weight was not associated with mid-season Todd C

Linking Procedural Performance with Radiobiological Analysis in Radiation Therapy

Creator:: Harry, Taylor Dylan
Abstract:: Radiation therapy is a sophisticated complex process. Systematic methods are needed to quantitatively evaluate the quality of a complex process and hence radiation therapy treatments. An ideal result for a complex process must be established to determine if the complex process is completed acceptably. For radiation therapy, this can be...
Resource Type:: Dissertation
Full Text:: . Abstract approved: ____________________________________________________ Todd S. Palmer

Extending the discrete maximum principle for the IMC equations

Creator:: Talbot, Paul W.
Abstract:: The implicit Monte Carlo (IMC) method [16] for radiative transfer, developed in 1971, provides numerical solutions to the tightly-coupled, highly-nonlinear radiative heat transfer equations in many physical situations. Despite its popularity, there are instances of overheating in the solution for particular choices of time steps and spatial grid sizes. To...
Resource Type:: Masters Thesis
Full Text:: Equations. Abstract approved: Todd S. Palmer The implicit Monte Carlo (IMC) method [16] for radiative

Groundwater Flooding and Guerrilla Trenches : a Participatory Approach for Flood Control

Creator:: Kemper, Joseph B.
Abstract:: Residents in South Falls City, a small town in the foothills of Oregon's Coast Range, battle intense flooding during the rainy season. Disagreements about surface water management pit neighbor against neighbor, but preliminary evidence suggests that groundwater flooding is an underlying cause. OSU researchers pair the emerging literature on groundwater...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ W. Todd Jarvis Residents in South Falls City, a small town in the foothills of Oregon’s

High Order Finite Elements SN Transport in X-Y Geometry on Meshes with Curved Surfaces in the Thick Diffusion Limit

Creator:: Woods, Douglas N.
Abstract:: The high-order finite element S[subscript N] transport equations are solved on several test problems to investigate the behavior of the discretization method on meshes with curved edges in X-Y geometry. Simpler problems ensured the correct implementation of MFEM, the general fi nite element library employed. A convergence study using the...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Todd S. Palmer The high-order finite element SN transport equations are solved on

The iterative thermal emission Monte Carlo method for thermal radiative transfer

Creator:: Long, Alex R.
Abstract:: For over 30 years, the Implicit Monte Carlo (IMC) method has been used to solve challenging problems in thermal radiative transfer. These problems are typically optically thick and di ffusive, as a consequence of the high degree of "pseudo-scattering" introduced to model the absorption and reemission of photons from a...
Resource Type:: Masters Thesis
Full Text:: Monte Carlo Method for Thermal Radiative Transfer. Abstract approved: Todd S. Palmer For over 30

Steady State Modeling of the Minimum Critical Core of the Transient Reactor Test Facility

Creator:: Alberti, Anthony L.
Abstract:: With the advent of next generation reactor systems and new fuel designs, the U.S. Department of Energy (DOE) has identified the need for the resumption of transient testing of nuclear fuels. The DOE has decided that the Transient Reactor Test Facility (TREAT) at Idaho National Laboratory (INL) is best suited...
Resource Type:: Masters Thesis
Full Text:: Modeling of the Minimum Critical Core of the Transient Reactor Test Facility Abstract approved: Dr. Todd

Diffusion Accelerated Implicit Monte Carlo via Nonlinear Elimination for Thermal Radiative Transfer

Creator:: Lam, Adam Q.
Abstract:: In this dissertation, we derive and implement a new transport-diffusion hybrid algorithm for solving thermal radiative transfer (TRT) problems. Using the method of nonlinear elimination (NLEM), the TRT system of equations can be written in terms of a transport equation with the absence of scattering and a diffusion equation. The...
Resource Type:: Dissertation
Full Text:: : Todd S. Palmer In this dissertation, we derive and implement a new transport-diffusion hybrid al

Detection of actinides via nuclear isomer de-excitation

Creator:: Francy, Christopher J.
Abstract:: The detection of illicit weapons-grade nuclear material is a significant technical challenge receiving a great deal of attention in the nuclear community. A proposed solution is to actively bombard the material under investigation with neutrons, populating nuclear isomers in any potential fissile material. These isomers decay quickly, releasing gamma rays...
Resource Type:: Masters Thesis
Full Text:: : __________________________________________________________ Todd S. Palmer The detection of illicit weapons-grade nuclear material is a significant

Household Determinants and the Resource Consumption: A Case Study of Baghmara Community Forestry in Nepal

Creator:: Timilsina, Dinesh
Abstract:: This study examines the association of household characteristics with forest product consumption and other benefits derived from community forest in Nepal. The analysis is based on random sample data of 80 households from a Community Forest User Groups of Baghmara Community Forestry (BCF) in Nepal. Using an OLS regression to...
Resource Type:: Capstone Project
Full Text:: Prof. Todd Pugatch This study examines the association of household characteristics with forest

Feasibility Study of Using HANARO Fuel Rods in WWR-SM Reactor

Creator:: Peguero, Lara M.
Abstract:: Interest in increased fuel supply stability has driven an investigation into possible alternate fuel for use in the WWR-SM research reactor at the Institute of Nuclear Physics in Uzbekistan. The WWR-SM is a high-power, pool-type research reactor currently utilizing IRT-4M fuel made by a single Russian supplier. A candidate for...
Resource Type:: Masters Thesis
Full Text:: Using HANARO Fuel Rods in WWR-SM Reactor Abstract approved: Todd S. Palmer Interest in increased fuel

Globalization of water resources : examining social learning using serious gaming

Creator:: Taha, Fatima A. M.
Abstract:: This study examined the Water Footprint Computer Assisted Board Game (WFCABG) as a tool for enhancing the social learning of water resources issues surrounding commodities trade. The study engaged 73 students from various countries and professional backgrounds, in two academic settings in two different countries: Oregon State University (United States)...
Resource Type:: Masters Thesis
Full Text:: _____________________________________________________________________ W. Todd Jarvis This study examined the Water Footprint Computer Assisted Board Game (WFCABG

Neutronic Analysis of a Liquid Metal Fast Reactor Experiment in the Large-I Position of the Advanced Test Reactor

Creator:: Lilley, Benjamin C.
Abstract:: Material testing experiments are needed to enable the next generation of nuclear fission reactors. Concluding in 2009, the Boosted Fast Flux Loop (BFFL) project was devised as a way to test fast reactor materials and fuels in the Advanced Test Reactor (ATR), however the experiment location it used is now...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Todd S. Palmer Material testing experiments are needed to enable the next generation of

Application of Advanced Hybrid Transport Methods for Nonproliferation Test Problems

Creator:: Somasundaram, Elanchezhian
Abstract:: The implementation of advanced hybrid (Monte Carlo/Deterministic) transport methods for realistic test problems has been a challenge due to the overhead efforts associated with interfacing a solution generated by a deterministic solver with a Monte Carlo based radiation transport code. In this work, with the help of Transpire, Inc., a...
Resource Type:: Dissertation
Full Text:: approved: Todd S. Palmer The implementation of advanced hybrid (Monte Carlo/Deterministic) transport meth

Initial performance assessment for implementation of hot mix asphalt containing recycled asphalt shingles in Oregon

Creator:: Samoo, Faisal Ahmed
Abstract:: This thesis documents the evaluation of the initial performance of pavement containing recycled asphalt shingles (RAS) in Oregon. The research was funded by the Oregon Department of Transportation (ODOT) and the Federal Highway Administration and was conducted at Oregon State University. The key objectives of this thesis are to document...
Resource Type:: Masters Thesis
Full Text:: : Todd V. Scholz This thesis documents the evaluation of the initial performance of pavement

Investigation Into the Use of a Lead Slowing Down Spectrometer for Neutron Cross Section Analysis

Creator:: Keppen, Jackson D.
Abstract:: A lead slowing-down spectrometer (LSDS) was modeled in the hopes of beginning a nuclear data development campaign at Oregon State University. An LSDS can be used for neutron interrogation techniques, such as determining isotopic inventory of a sample of unknown components or determining the cross section of a sample of...
Resource Type:: Honors College Thesis
Full Text:: Spectrometer for Neutron Cross Section Analysis Abstract approved: Todd Palmer A lead slowing-down

Analysis of the antineutrino rate during CANDU reactor startup

Creator:: Matthews, Christopher
Abstract:: Detection systems used to monitor reactor operations are of significant interest as tools for verification of operator declarations. Current reactor site safeguards are limited to visual inspections and intrusive monitoring systems. The recent development of antineutrino detectors may soon allow real-time monitoring from an unobtrusive location. Antineutrinos are produced through...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ Todd S. Palmer Detection systems used to monitor reactor operations are of significant

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