Expansive soils in Eugene, Oregon present a problem to
residents, consultants, contractors, and the city government. During
the years 1977 to 1979, the nature and extent of the problem was
identified, including an outline of the local occurrence of expansive
soils and possible engineering solutions to the most often encountered...
Influences of tidal and slower (subtidal) oceanic flows over the continental shelf and slope off Oregon are studied using a high-resolution ocean circulation model and comparative model-data analyses. The model is based on the Regional Ocean Modeling System (ROMS), a fully nonlinear, three-dimensional model (using hydrostatic and Boussinesq approximations). The...
This thesis describes calculations done to determine the radiation hazard of the current Prompt Gamma Neutron Activation Analysis (PGNAA) scattering chamber at the Oregon State TRIGA Reactor (OSTR) and compare it to the amount that would be given off by a new thin-walled chamber design. These calculations were completed with...
This work is a representation of my competencies, experiences, reflections and learning through
the College Student Services Administration Master’s of Education program at Oregon State
University. This paper consists of both research and reflective writing and demonstrates in-depth
my learning and development over the past two years in the College...
The perception of a long-term cost advantage of synthetic infill turf systems relative to natural grass systems has contributed to a rise in their popularity in the USA. However, few comprehensive cost assessments of natural grass and synthetic infill systems exist. There are also no studies looking at interactions between...
"This Long Disease, My Life": Alexander Pope and the
Sciences by Marjorie Nicolson and G.S. Rousseau has been the
standard work on Alexander Pope and Newtonian science ever
since it was published in 1968. Literary scholars and
biographers continue to be swayed by its influence.
Unfortunately, the work they so...
The effect of the mutual inductances between the rotor coils of a synchronous machine on its defined reactances and predicted transients are investigated. Two linearized models of the machine are considered. One uses the Laplace-Transform approach, with minimum number of assumptions on the inter-coil couplings, in developing a model for...
Rising human populations and climate change are putting increasing demands on our already-limited freshwater sources. In response to these concerns, homeowners and municipalities have been encouraged to replace turfgrass – a plant with relatively high irrigation needs – with drought-tolerant plants that do not require frequent irrigation. However, the many...
This is a review paper based on recent literature in the areas
of spherical mirror resonators and optical mode selection. The
Fabry-Perot interferometer with spherical mirrors has been widely
used as a laser resonator. The modes of oscillation, diffraction
losses and resonance condition are determined for the confocal
resonator, i.e....
This thesis introduces a Brushless Doubly-Fed Machine (BDFM), stand-alone
generator system. Development of a BDFM current-forced model, along with the
analysis of air gap power distribution between the two stator windings and the rotor
circuit, pave the way for the characterization and analysis of stand-alone generator
systems.
The main disadvantage...
A Brushless, Doubly Fed Machine (BDFM) attempts to combine the advantages
of conventional induction and synchronous types of electrical machines by its unique
architecture. The validation of BDFM designs in an actual test environment requires the
estimation of the BDFM model parameters from actual experimentation. Accurate values
for the parameters...
In this paper a signal-processed antenna and receiver system is
proposed and analyzed. In addition, a simulation of the balanced-mixer portion of the processing system is made on a hybrid computer
to find the bandwidth limitations for the total system. The system
utilizes both the amplitude and phase information of...
The power dissipation of microstrip transmission-line on
gold-doped silicon substrates was investigated. The gold-doping was
applied to a regular n-type silicon substrate with resistivity of 5 to
10 ohm-cm. Insertion-loss tests were employed to measure the
power dissipation of the microstrips. Power dissipation somewhat
less than that for intrinsic silicon...
The exponentially tapered, nonuniform transmission'
line, applied as an impedance transformer, is analyzed and
modified. The analysis develops an expression for the input
reflection coefficient that has the magnitude and phase
as distinct functions. This allows ease in comparing the
approximate and exact solutions and in developing the S-parameters for...
This paper develops an equation, from an heuristic set of assumptions,
which describes the axial current, leakage current, resultant
electric field, and resultant earth potential occurring when
a pipeline buried within a resistive earth is subjected to a distributed,
primary, axial, electrostatic field produced from a high-voltage, direct-current (HVDC) power...
The synchronous machine is an essential component of a power
system and determination of its parameters accurately is an
important task in securing adequate modes of operation through
certain control strategies. An estimation technique based on the
Powell algorithm was evaluated for the identification of these
parameters on the basis...
The recently emerged Grapevine Red Botch Virus (GRBV) impedes proper berry ripening primarily by reducing sugar accumulation and color development in red-fruited Vitis vinifera L. cultivars. To date, there is no recommended management strategy for virus spread or the impacts of the disease beyond removal and replacement of infected vines....
In this research, a novel shunt compensation scheme
design procedure is developed for unbalanced, untransposed
n-phase transmission lines. The main function of the
scheme is to reduce the effect of the capacitive coupling
on untransposed transmission lines to levels where successful
single-pole switching is assured. The analysis procedure
is carried...
Each year thousands of college graduates enter the business world armed with skills accumulated as student leaders, but how applicable are these skills to the business world? While there are many studies on learnable behaviors associated with effective student leadership and many studies on behaviors associated with effective business leadership,...
The focus of this thesis is developing materials for thin-film transistors (TFTs). Cu₃SbS₄ is explored as p-channel layer. Cu₃SbS₄ TFTs show p-type, depletion-mode behavior with a small amount of gate-controlled modulation of the channel conductance. This behavior is consistent with Hall measurements indicating a mobility of 17 cm²V⁻¹s⁻¹ and hole...
Chain saws are a common tool used by large logging corporations and family homesteads to manage forests, limb trees and buck lumber. A significant cost of operation is the continuous required supply of bar and chain oil. Consumers and logging corporations desire a lubricant with a high performance to cost...
The primary objective of this thesis is to explore new absorber and p-type window layer materials for thin-film solar cell applications. A new thin-film electron beam deposition system has been installed, is now operational, and has been used to deposit several types of solar cell absorber layers. Material investigations include...
The intrusion-related Cerro Negro Norte Fe-oxide (Cu-Au) deposit is hosted in andesites and diorites of the early to middle Cretaceous Coastal Cordilleran arc of northern Chile. Tabular and irregularly shaped magnetite orebodies are localized on splays and fractures of the regional NINE striking Atacama Fault Zone. Production from this district...
A provenance study of crypto-crystalline silicates was performed at the Cooper's Ferry archaeological site in west-central Idaho on the Columbia Plateau. In this research, the author used instrumental neutron activation analysis as well as portable x-ray fluorescence to examine and characterize the geochemistry of 300 geologic samples of crypto-crystalline silicates...
Over 3,000 feet of nonmarine Late Cretaceous sedimentary rocks are exposed within the northern Fish Lake Plateau. The Cretaceous
strata are overlain by over 2,000 feet of Early Tertiary nonmarine sedimentary rocks and volcanics. Landslide deposits cover over one-half of the area. The Late Cretaceous Blackhawk Formation, the oldest formation...
The influence of varying horizontal and vertical stratification in the upper layer ( inline image m) associated with riverine waters and seasonal atmospheric fluxes on coastal near-inertial currents is investigated with remotely sensed and in situ observations of surface and subsurface currents and realistic numerical model outputs off the coast...
In order to determine how contaminants from pharmaceutical, agriculture, and industry will move through groundwater systems, it is imperative to further our understanding of the relationship between physical, biological, and chemical properties of aquifers and transport and transformation of these products. Several studies have explored how heterogeneities in groundwater systems...
The dynein molecule is a peculiar motor protein recognized for its unique stepping behavior. Sometimes it steps forwards. Other times it steps backwards. It has even been observed to occasionally shuffle by beginning a step with the same domain many times in row. These motions make dynein an interesting object...
Stressful environmental conditions affect the adrenocortical function of developing animals, which can have consequences
for their fitness. Discovery of the avian stress hormone corticosterone (CORT) in feathers has the potential to broaden the
application of endocrine research in ecological and evolutionary studies of wild birds by providing a long-term measure...
The traceability practices and systems of 48 separate seafood businesses were assessed as part of an evaluation of 9 global seafood value chains (from catch to point of sale to the consumer). The purpose was to gain insights and provide knowledge about the impact of traceability on improving seafood industry...
Despite climate change requiring the cutback of fossil fuel consumption, the world continues to increase its energy demands each year. To meet the ambitious goals outlined during the Paris Agreement in 2015, which set a goal to limit global warming to 1.5°C [1], changes in energy production methods are necessary....
Modern science was produced by a Christian society,
and although science has had an effect on Christianity, it
could not itself remain unaffected. In the second half of
the nineteenth century, the subject of evolution was as
much a religious as a scientific issue. The battle line
was drawn and...
The woodlands of New York City's Central Park have seen varying levels of management and neglect since the creation of the park over 150 years ago. The Central Park Conservancy has aimed to restore, enhance, and elevate the stewardship of the park, including its woodlands and other Natural Areas, since...
The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured...
The mound-building harvester ant, Pogonmyrmex owyheei Cole,
(formerly included in the species occidentals) is widely distributed
on the semi-arid rangeland east of the Cascade mountains in Oregon.
Because of its seed foraging and vegetation clearing habits, this ant
has been considered as a possible competitor with livestock and
wildlife for...
Bioavailability of selenium (Se) in processed tuna and
wheat products was studied in humans and rats. The protein
source of the rat diets was torula yeast with Se supplied by
either raw, precooked or canned tuna, or whole wheat flour,
bread or bran. Sodium selenite was used as a control....
The present research sought to investigate individual differences in the way individuals process intuitive risk judgments. The present investigation is centered on Fuzzy Trace Theory (Brainerd & Reyna, 1991), a developmental dual process theory of cognition which posits two ways in which individuals process information, gist and verbatim processing. 228...
Airborne Wind Energy System (AWES) are quickly coming to fruition, with increased energy production while reducing the cost of implementation and materials. This thesis develops a new computational model for a tethered AWES and characterizes a new rapid prototyping method with the objective of supporting the design and rapid prototyping...
My dissertation title is, “Applied economic strategies to evaluate policies and environmental outcomes: case studies from immigration and ecosystem services.” The first two chapters of this dissertation concern the relationship between local immigration policies and societal welfare. The third chapter examines the impact of human activity on the environment and...
This investigation was a two stage study performed in two urban/
rural communities in Washington State. Stage I was an effort to replicate a study performed in an eastern Virginia school district whereby
results were obtained demonstrating that 9th graders and black students
identified teacher warmth behaviors as being important...
Ceratonova shasta is an obligate endoparasite of salmonid fish that is endemic to the Pacific Northwest of North America. The parasite has a complicated lifecycle with two distinct spore stages and two obligate hosts, a salmonid and a freshwater annelid. Myxospores released from infected salmonid hosts, infect Manayunkia occidentalis (freshwater...
Birds perform valuable ecological functions and are useful environmental indicators. Avian distributions and diversity are predicted to change over the next 50 years. Little information exists on the role of local and regional conditions in fluctuations of avian communities over time. Historic datasets present a legacy of information that helps...
Mixia osmundae (Basidiomycota, Pucciniomycotina) represents a monotypic class containing
an unusual fern pathogen with incompletely understood biology. We sequenced and analyzed
the genome of M. osmundae, focusing on genes that may provide some insight into its
mode of pathogenicity and reproductive biology.
Mixia osmundae has the smallest plant pathogenic basidiomycete...
Here we present a phylogeny of beetles (Insecta: Coleoptera) based on DNA sequence data from eight nuclear genes, including six single-copy nuclear protein-coding genes, for 367 species representing 172 of 183 extant families. Our results refine existing knowledge of relationships among major groups of beetles. Strepsiptera was confirmed as sister...
Since 1935, France has introduced a set of strict national wine rules and regulations, the Appellation d’Origine Contrôlée (AOC). The AOC limits fraud and oversees quality control by basing the rules on terroir. High quality from terroir comes has both physical and cultural factors. Before 1935, France produced a variety...
The purpose of this study was to better understand the historical development of the British Columbia (B.C.) community college, university college, and institute system with the focus on the changing nature of voluntary inter-institutional collaboration in relation to provincial coordination. The study also examined the related themes of centralization and...
This dissertation has two objectives. The first objective is to determine where best to situate the study of mentoring (i.e. the 'making of scientists') on the landscape of the history of science and science studies. This task is accomplished by establishing mentoring studies as a link between the robust body...
The combined effects of habitat loss, degradation, and fragmentation pose a serious threat to Earth's biodiversity, imperiling even relatively common species. 'Habitat' is necessarily a species-specific concept, and investigations of bird diversity relationships and subsequent efforts to prioritize conservation areas, are challenged by the difficulty of estimating complex habitat gradients...
John Wesley Powell worked actively for public land system
reform while a director of geographical and geological surveys in
the West from 1869 to 1894. Although this has won him acclaim as a
conservationist, the basis of Powell's linkage of reform with
scientific work is poorly understood.
A study of...
Homosexual men in Nazi Germany experienced legal and social oppression that was rooted in both the cultural homophobia of Twentieth Century Germany and the existential homophobia of high-ranking Nazi officials. However, the Nazi Regime’s enforcement of homonegative policy was not unilateral, often ignoring the actions of members of Nazi-affiliated groups....
Across the U.S. social activism is on the upsurge, offering possibilities for a revolution against capitalism. However, these possibilities are potentially undermined by entrenched factionalism amongst the left. At root, such in-fighting is fostered by the creation of false dualistic frameworks on the transition out of capitalism and into the...
Symbiotic relationships of bacteria with higher organisms are
commonly observed in nature; however, the functional role of these
relationships is only rarely understood. This is particularly evident in
epibiotic bacterial associations in the marine environment where the bacteria
are often a diverse ensemble of microorganisms, thus complicating the
identification of...
A number of historians of science have been involved
in studying the nature of biology at the turn of the
century, and the picture that they have developed describes
biology during this time as a field struggling to define
itself. During the late nineteenth and early twentieth
centuries, biologists were...
In order to assist WAC/WID practitioners and science writing faculty in incorporating translingual perspectives in disciplinary writing instruction, this study extends translingualism to language practice in the sciences by conducting a corpus study of Al-Awamia, a Moroccan agronomic journal. Mapping rhetorically significant changes across abstracts authored in English, French, and...
The growing need for accurate forest biomass and carbon estimates has sparked a recent re-examination of direct volume estimation and taper modeling techniques. Additionally, the need for increased precision of biomass and carbon estimates drives a need to improve the techniques used to evaluate these models. Taper equations have an...
Modeling tire-snow interaction is important in designing effective snow tires, which directly affects road safety during wintry weather. Unfortunately, tires have complex tread designs and the physical properties of snow have not been characterized. We employ the Material Point Method (MPM) for simulating a material that mimics the fracturing and...
I defend robust realism from arguments that raise epistemological challenges to it based on considerations about either moral disagreement or the genealogy of our moral beliefs. The first argument is the “Argument from Conciliationism,” which contends that the moral disagreements that obtain between moral peers give us reason to believe...
Cancer is currently the second leading cause of death in the United States and the sixth leading cause of death worldwide. Due to cancer’s variability in type, location, growth rates, and patient physiology, treatment models are based off of previous experimental and clinical work. This variability, however, can lead to...
Immersion energies of atoms in a jellium environment were calculated using density functional theory and the Kohn-Sham (KS) equations. It was found that the KS scheme does not destroy an existing axial symmetry of the electron structure of the impurity atom. The definition of phase shifts was extended to those...
The HyperLogLog (HLL) algorithm is used to estimate the cardinality of large sets. This thesis gives a novel analysis of the HyperLogLog algorithm by using techniques from statistics and probability. Initially, closed form bounds for the mean and variance of the max of n independent and identically distributed geometric random...
Previous investigations of glacier dynamics at Tioga Pass during the Last Glacial Maximum (LGM) have produced different conclusions. A map of the LGM ice extent and flow direction (Alpha et al., 1987) illustrates a south-to-north direction of ice flow across the pass with little evidence to support this inference. Since...
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...
The aerodynamic performance of an oscillating pitching and plunging foil operating in the energy harvesting mode is investigated. Experiments are conducted in a closed-loop recirculating wind tunnel at Reynolds numbers of 24,000 to 48,000, and reduced frequencies (k = fc/u) of 0.042 to 0.083. Foil kinematics are varied through the...
The major objective of this study was to determine why certain
winter wheat cultivars, when hybridized, will produce a greater proportion
of desirable plants in subsequent, segregating generations.
Three winter wheat parents were chosen as the experimental material,
based on their known performance as parents. Yamhill and
Pullman Selection 101...
The satellite structure ("shake-up") present in the X-ray
photoelectron spectra of several planar molecules containing
double bonds has been investigated in the gas phase.
This set consists of three five-membered heterocyclic
molecules, ethylene and two of its fluorinated analogs, and
benzene with three of its fluorinated analogs. In addition,
core...
Variation is a commonly encountered element of modern software systems. Recent research into variation has led to increasing interest in the development of variational programming languages and corresponding variational models of execution. Variational imperative languages pose a particular challenge due to the complex interactions between side effects and variation. The...
As the world's power needs grow, the demand for power from renewable resources, such as wind or solar is increasing. One major drawback associated with these renewable resources is that the power output is dependent on environmental factors, such as cloud cover and wind speeds. This allows the possibility of...
In the past, classification systems for the analysis of morphodynamic variability have been developed in an attempt to understand large scale coastal behavior. The motivation behind the creation of these classification systems has been to provide a framework of analysis, in order to understand large scale response to seasonal variability,...
The purpose of this study was designed to answer
1. What are the beliefs and attitudes that Oregon home economics
teachers hold about various new trends?
2. Are Oregon home economics teachers willing to support the
various new trends?
3. Are Oregon home economics teachers willing to further prepare
themselves...
The focus of this research concentrates on enhancement
of the LOGSIM mechanized log harvesting system
simulator. Enhancement of software focuses on overall
improvement of the user environment as well as improvement
of the performance and capabilities of the simulation
package.
An enhanced version of the front-end interface
program is developed...
Purpose of the Study
There were two major purposes of this study. The first was to
determine which socio-economic and educational factors normally
available to Neighborhood Youth Corps personnel were associated with
success and failure in the out-of-school program. The second purpose
was to utilize these available socio-economic and educational...
Dalmatian toadflax (Linaria dalmatica) has become a prolific invasive plant of rangelands in Oregon since its arrival in the early 20th century. In 2001, the Oregon Department of Agriculture initiated a release program promoting the distribution of the stem-boring weevil, Mecinus janthinus as classical biological control agent to reduce densities...
As Si MOS approaches its maximum limits in speed and bandwidth, new
devices are desired to meet the needs of high speed communications and signal
processing. A device that exhibits superior performance to Si MOS, BJT, and
GaAs technology is the HEMT (high electron mobility transistor).
The HEMT offers superior...
Radioisotope Power Systems (RPS’s) are a key element to NASA’s deep space exploration programs. As NASA looks towards new generations of smaller, modular spacecraft, appropriately smaller RPS’s will be needed. The Single General Purpose Heat Source Radioisotope Thermoelectric Generator (S-GPHS-RTG) has been developed to fill this role. The S-GPHS-RTG will...
The intrusion-related Cerro Negro Norte Fe-oxide (Cu-Au) deposit is hosted in andesites and diorites of the early to middle Cretaceous Coastal Cordilleran arc of northern Chile. Tabular and irregularly shaped magnetite orebodies are localized on splays and fractures of the regional NINE striking Atacama Fault Zone. Production from this district...
Full Text:
, Coastal Cordillera, northern Chile
AN ABSTRACT OF THE THESIS OF
Alexander K Raab for the degree of
We do not know how to align a very intelligent AI agent's behavior with human interests. I investigate whether—absent a full solution to this AI alignment problem—we can build smart {\ai} agents which have limited impact on the world, and which do not autonomously seek power. In this thesis, I...
Metallic nuclear fuels have long been studied for use in advanced nuclear reactors, with efforts invested in improving the viability of metallic nuclear fuel elements and overall safety of advanced reactor design concepts. During reactor operations, fuel forms undergo restructuring due to a variety of physical phenomena. Expansion of the...
The hemlock woolly adelgid (Hemiptera: Adelgidae: Adelges tsugae; HWA) is an invasive and damaging pest on hemlock in eastern North America. HWA is native to the Pacific Northwest, where it does not damage hemlock. In support of classical biological control of HWA in eastern North America, abundances of native predators...
Weak-wind flow in the nocturnal boundary is one of the most poorly understood problems in the field of meteorology. The understanding of weak-wind flows is essential for the improvement of regulatory dispersion models which are currently rendered invalid under weak-wind conditions and stable stratification. Recently there have been increased efforts...
Shrews previously recognized as Sorex monticolus were classified
into two species (one with 14 subspecies, the other monotypic) on
the basis of a morphometric analysis of 3610 individuals from
throughout their range. Sorex m. neomexicanus has been recognized
previously as a subspecies of Sorex monticolus but is recognized
herein as...
A 2-year trial was conducted at Oregon State University's Hermiston Agricultural Research and
Extension Center to examine the effects of spunbonded row cover and supplemental calcium fertilization
on blossom-end rot in two varieties of bell pepper. Blossom-end rot is a common cause of bell pepper yield
losses, especially at the...
Organically certified Northern Highbush Blueberry (NHB; Vaccinium corymbosum L.) production in the Columbia Basin region of Oregon and Washington is expanding. Soils in the region are typically calcareous and highly alkaline, often requiring pH adjustment to an ideal range of 4.5–5.5 to support the establishment of the acid-loving, ericaceous crop....
The Duzel Rock area includes four square miles in the eastern
Paleozoic subprovince of the Klamath Mountains southeast of Fort
Jones, California. The structurally complex terraine is composed
of Silurian graywacke, post-Silurian phyllite, limestone and basalt
associations, and minor andesitic intrusive rocks.
Three groups of sedimentary and extrusive rocks have...
Full Text:
, California
AN ABSTRACT OF THE THESIS OF
DANIEL ALEXANDER NACHMAN for the degree of Master of Science
in
This thesis examines Latinx poetry in relation to the September 11th attacks and the reconfigurations of racial structures and the American empire that followed, most notably through the Department of Homeland Security and their agency Immigration and Customs Enforcement (ICE). ICE politically characterizes immigrants as anti-American to perpetuate stereotypes against...
Accurately describing drag and virtual mass forces in two-phase flows is crucial for high fidelity modeling of nuclear thermal hydraulic safety systems. This study compares existing drag coefficient correlations commonly used in computational fluid dynamics (CFD) applications for air bubbles to experimental data collected for ellipsoidal air bubbles of varying...
This study of the immediate, localized effects of a small dredging
operation on the benthic invertebrate community in the shipping
channel of Coos Bay, Oregon, was designed: 1) to measure the extent
of the physical removal of benthic macro- and meiofauna by hopper
dredging; 2) to record the subsequent benthic...
Many economically important Pacific salmon fisheries along the west coast of North America are mixed-stock, recreational systems, in which managers strive to account for interactions between fish, anglers, and management policy while balancing fishery access against conservation of vulnerable stocks. Specific challenges facing fisheries managers include limited control over angling...
The purpose of this study was to examine the
relationship between parental attitudes and student
attitudes toward the consumption of alcoholic beverages,
between parental attitudes toward the consumption of
alcoholic beverages and the reasons students drink alcoholic
beverages, and between parental attitudes toward the
consumption of alcoholic beverages and the...
There is currently a revolution in archaeological morphometric research. As advances in technology are making more in-depth analyses both time and cost efficient. In this work, a collection of artifacts from the Pilcher Creek site (35UN147) in eastern Oregon was digitized using high resolution three-dimensional scanning. These scans were then...