The research undertaken consisted of the study of three topics
affecting the performance of asphalt concrete mixtures, that is, mixing
moisture, oxidative aging and higher tire pressures and axle loads.
This thesis presents the findings of the research comprising these
three topics.
In the first study, the effects of mixing...
Bacterial histamine formation in mackerel and albacore was studied by inducing histamine in the muscles under controlled storage conditions. The optimum temperature for histamine formation was 25°C. The highest level of histamine detected was 283 mg/100 g in the 2-day stored mackerel; and 67.1 mg/100 g in the 6-day stored...
The research undertaken in this study deals with three topics related to the prediction of thermodynamic properties of electrolytes in aqueous solutions. In the first, Pitzer ion interaction parameters for 304 single electrolytes were evaluated from recently published osmotic coefficient data at 25°C by using multiple regression analysis to fit...
Performance-based design has gained interest in recent years among structural designers and researchers. Performance-based design includes selection of appropriate building sites, structural systems and configurations, as well as analytical procedures used in the design process, to confirm that the structure has adequate strength, stiffness and energy dissipation capacity to respond...
The ever changing nature of the retail industry, and the additional challenges of doing business in a rural area, mean that retailers in rural communities face a unique situation that makes them especially vulnerable to outshopping by rural consumers. Therefore the purpose of this study was to investigate factors which...
The total synthesis of a highly potent cytotoxic marine natural product, phorboxazole A, is described. Both a palladium(II)-mediated and a palladium(II)-catalyzed intramolecular alkoxycarbonylation were used as key steps for the preparation of the two cis-2,6-disubstituted tetrahydropyran rings (C22-C26 and C11-C15) of phorboxazole A.
The synthesis used a convergent approach involving...
Digital phase-locked loops (PLLs) have been receiving increasing attention recently due to their ease of integration, scalability and performance comparable to their analog counterparts. In digital PLLs, increased resolution in time-to-digital conversion is desirable for improved noise performance. This work describes the design and simulation of a stochastic time-to-digital converter...
The purpose of this study was, first, to investigate whether there
is a vitamin B-6 requirement for carnitine synthesis and, second, to investigate
the effect of fasting on vitamin B-6 metabolism. An experimental
group of 72 rats (6 per group) were fed either a vitamin B-6 deficient
diet (-B6) (ad...
The 1,1-dichloroethene (1,1-DCE) cometabolic transformation abilities of indigenous and bioaugmented microorganisms were compared in microcosms constructed with groundwater and aquifer solids from the Moffett Field site, CA. Microbial community structure in the microcosms and possible community shifts due to 1,1-DCE transformation stress was evaluated by terminal restriction fragment length polymorphism...
Creating schedules for the job shop manufacturing system is an extremely difficult task. Although researchers have devoted a lot of attention to generating optimal solutions, these solutions are static, thus they do not update as random events occur that disrupt the system. As smart manufacturing has grown, researchers have been...
The major obstacle to widespread parallel programming of multiprocessors is the lack of a convenient parallel programming system. PPSE (Parallel Programming Support Environment) is a unified approach to parallel programming. Parallax is developed as a component of PPSE based on ELGDF which is a graphical language for designing parallel programs....
This report describes the Graphical Editor part of DataLab, a visual programming tool for the specification and synthesis of abstract data types (ADTs). DataLab consists of two major components: graphical editor and source code generator. The graphical editor is used to design an abstract data structure and its operations by...
The demand for portable electronic systems and the continued
down-scaling of device dimensions resulted in rapid improvement in
the performance of integrated systems. Several low-voltage design
techniques have been proposed to operate analog circuits with sub-1V
supply. However, these techniques require higher power consumption
to achieve large dynamic range while...
New transparent p- and n-type semiconductors and luminescent materials have been prepared and characterized. Synthesis, structures, optical and electrical properties of new chalcogenide fluoride p-type transparent semiconductors MCuQF (M=Ba, Sr; Q=S, Se, Te) are described. Band-gap tuning and improvement in conductivity through p-type doping are demonstrated in the family. The...
Job aids are instruments used on the job to improve
human performance by enhancing the knowledge and/or skills
of performers. Conventional job aids are usually printed
on paper; examples include checklists, recipes, and decision
tables.
Expert systems are computerized job aids which interact
with novices to help solve problems normally...
The purpose of the present study was to determine consumer perceptions of apparel products in Internet shopping. According to the existing literature, four categories of perceptions play primary roles for apparel shopping consumer decisions: apparel appearance, apparel comfort, fabric characteristics, and apparel fit. The present study aimed to observe how...
Natural convection heat transfer in air between two vertical
plates 38 by 24 inches was investigated in this work with spacings
between the plates of 0.625, 1.0 and 1.75 inches. One plate was isothermal
and the other adiabatic.
To measure the point velocities in the air layer a very thin...
This study aimed to evaluate the contingencies and reinforcements that most engage active high school (HS) students in a virtual classroom to learn and adopt healthy lifestyles. In Phase 1, 21 HS students completed focus groups about factors they perceived as engaging for them in learning about lifelong healthy habits....
Hydrocarbon solvents are widely used in the production of paints, adhesives, dyes, polymers, plastics, textiles, printing inks, agricultural products and pharmaceuticals. While the neuropathic potential of aliphatic solvents was shown in the 1970s, little is known about the neuropathic potential of aromatic solvents. The present study examines such solvents, 1,2-diethylbenzene...
The purpose of this study was to examine Korean
physical educators' attitudes toward teaching
handicapped students in their regular classes. Ninety-eight
schools were randomly selected from middle
schools in Korea. A total of 213 Korean physical
educators was the sample size used in this study.
The survey instrument used was...
Both transportation costs and market values of woody biomass are strongly linked to the amount of moisture in the woody biomass. Therefore, managing moisture in the woody biomass well can lead to significant advantages in the woody biomass energy business. In this study, two prediction models were developed to estimate...
The mountain pine beetle has impacted over 5 million hectares of pine forests in the Rocky Mountains region in the United States. Although some beetle-killed stands are available for salvage harvesting, there are many uncertainties in harvesting beetle-killed stands including safety, costs, recoverable products and their values. These uncertainties impose...
Effects of phorbol myristate acetate (PMA), dibutyryl cyclic
AMP (dbcAMP), 6-dimethylaminopurine (6-DMAP), okadaic acid
(OA), cycloheximide (CHX), actinomycin D (AcD) and tunicamycin
(TuM) on plasminogen activator (PA) activity and maturation rate
in bovine and porcine oocyte-cumulus cell complexes (BOCC and
POCC, respectively) in vitro were determined. Plasminogen
activator activity was...
Gradient elution chromatography is frequently used for the preparative separation
of peptides and proteins. Separations at high loadings are often avoided because peaks
become asymmetrical and saturate the detector. However, non-linear interactions which
become important at high loadings may actually improve the separation with greater
concentrations of the product being...
A complete solution, exact to second-order, for wave motion
forced by a hinged-wavemaker of variable-draft is presented. A
solution for a piston type wavemaker is also obtained as a special
case of a hinged-wavemaker with negative infinite draft. The
existing Stokes inviscid theories for mass transport is extended to
include...
Studies were conducted on the causes of low germination of
monogerm sugarbeet seed grown in western Oregon. Emphasis was
placed on the identification and measurement of endogenous inhibitors
as related to the germination and vigor. Both qualitative and quantitative
analytical methods were applied to examine the organic substances
in the...
The microprocessors will have more than a billion logic transistors on a single chip in the near future. Several alternatives have been suggested for obtaining highest performance with billion-transistor chips. To achieve the highest performance possible, an on-chip multiprocessor will become one promising alternative to the current superscalar microprocessor. It...
The navicular drop test (NDT), Feiss' line (FL) and standing foot angle (SFA)
are clinical tests used to estimate the amount of pronation via inferior displacement of
the tarsal navicular. Thirty-two patients (female and male, ages 18-65) who sought
medical treatment for lower extremity pathologies participated in the study that...
The internal structure of natural fiber composites can be manipulated by controlling the spatial distribution of fiber orientation and internal chemical and thermodynamic conditions during their consolidation. Objects highly tailored to specific service demands may thereby be produced. Techniques to form miniature structural beams from oriented hemp and random wood...
Hereditary variation is a vital component in the development of new and improved cultivars of landscape plants. Sources of hereditary variation include naturally occurring variation, recombination due to controlled crosses, artificial mutagenesis, and genetic modification via biotechnology. Here I explore all methods with the exception of genetic modification via biotechnology....
The severe global neglect of mental health care is believed to be the cause of a "worldwide epidemic of mental illness" (Tucci & Moukaddam, 2017). Within the United States, it is estimated that one in five children have a mental health disorder, with anxiety being one of the most commonly...
Fuel management has been used as an effective local strategy to reduce the undesirable consequences of wildfires. Many efforts toward scheduling of fuel management activities across a broader landscape have been proposed, with the hope of achieving larger landscape-scale management effects. However, scheduling of fuel management treatments across the broader...
The overarching premise of this dissertation is to understand how different college and university physical activity education policies affect college and university students. Fundamentally, some American colleges and universities require their students to complete a physical activity education requirement whereas others do not. Given the different policy arrangements of college...
This dissertation consists of three essays on private landowners' response to incentives for carbon sequestration in forests. The first essay examines private landowner response to incentives for carbon sequestration through various combinations of intermediate management practices. The second essay focuses on agricultural landowners' willingness to participate in an incentive program...
This study was designed to investigate whether the conservation of substance, weight, continuous quantity, discontinuous quantity, number, area, distance, length, and two-dimensional space are developed in sequence in the acquisition of conservation operations. More specifically, the purposes of the study are two-fold: (1) To assess the sequence and rate of...
Economic methodology is revisited to address issues in
fishery management, and survival analysis is suggested as an
analytical tool to solve the uncertainty problem in
evolutionary economics. Survival analysis can clarify in
statistical terms the impacts of fishery regulation and
economic and biological changes on the fisherman's final
decisions of...
DSA (Diffusion Synthetic Acceleration) has been developed to accelerate the SN transport iteration. We have developed solution techniques for the diffusion equations of FLBLD (Fully Lumped Bilinear Discontinuous), SCB (Simple Corner Balance) and UCB (Upstream Corner Balance) modified 4-step DSA in x-y geometry. Our first multi-level method includes a block...
This dissertation describes studies of isoprenoid biosynthesis in the
phytoflagellate Euglena gracilis. Elucidation of a novel isoprerioid pathway, the 2-Cmethyl-D-erythritol-4-phosphate (MEP) pathway, in addition to the generally known
mevalonate (MVA) pathway, led to extensive exploration of the distribution of both pathways in a variety of organisms. To date, photosynthetic eukaryotes...
Drilled shaft foundation elements provide a cost-effective foundation alternative for the support of building and bridge superstructure loads. Bi-directional pile loading tests (BDPLTs) to evaluate the capacity of drilled shafts have become popular owing to their capacity to save time and effort as compared to the use of top-down loading...
Library a la Carte is software developed at Oregon State University that lets you build customized Web pages by choosing exactly what you want from a menu of choices. Jane Nichols, Oregon State University subject librarian, will demonstrate how to create course Web pages, assignment tip sheets and subject guides...
Connectivity and larval dispersal is explored off the Oregon coast during the summer upwelling season of 2001 using numerical ocean circulation simulations. The study region, with strong wind-driven currents and variable topography, is modeled using the Regional Ocean Modeling System (ROMS) forced by the Coupled Ocean Atmosphere Mesoscale Prediction System....
The aims of this study were to determine university students’ reasons for enrolling in physical activity courses (PACs) at institutions with different course policy arrangements, and to determine whether those reasons were associated with students’ motivation, competence, and weekly exercise METs. University students (N = 612) enrolled at two universities...
Point Reyes is a 100-square mile peninsula located on the California coast about 30 miles north of San Francisco. The peninsula, surrounding bays, and neighboring coastal mainland are a unique biodiversity hotspot. The area underwent heavy human use, including ranching and logging, during the late 1800s and early 1900s. Conservation...
ZnS(O,OH) thin films for solar cell application were deposited onto glass substrates using the Continuous Flow Microreactor (CFM) process. In order to investigate the effect of pH on the physical properties of the film, the ZnS(O,OH) thin films were prepared by the CFM process with varying pH solution in the...
The catalytic activity of a monolithic catalyst with nanosized Pt and Au particles on ZnO/Al₂O₃ (Pt-Au/ZnO/Al₂O₃/M) prepared by a wash-coat method was examined, specifically for toluene oxidation. FE-SEM image showed clearly the formation of a ZnO/Al₂O₃ layer on the monolith. Nanosized Pt-Au particles on ZnO/Al₂O₃/M with different sizes could be...
Operational studies are necessary to support production and management decisions of forest industries. A time study (TS) approach is widely used in timber harvesting operations to understand the performance of individual harvesting machines as well as the entire system. However, several limitations of the TS approach include the use of...
Mechanisms of motor control and function are interesting to those from the medical, athletic training and sports performance professions primarily during the development of conditioning and rehabilitation programs. The aim of this study was to assess spinal control mechanisms in two groups of explosively trained, female athletes from a NCAA...
Accurate freeway travel time estimation is of increasing importance for the travelers’ information and route guidance system. A non-parametric statistical methodology known as regression trees is deployed in this research for dynamically and accurately estimating freeway travel times for the I5-I205 loop in the Portland Metro area of Oregon using...
In a wireless sensor network, sensor nodes are deployed in an ad hoc fashion and they deliver data packets using multihop transmission. However, transmission failures occur frequently in the multihop transmission over wireless media. Thus, a loss recovery mechanism is required to provide end-to-end reliability. In addition, because the sensor...
Two ground-based timber harvesting methods have been commonly used for beetle-kill salvage treatments after a bark beetle epidemic in northern Colorado. A lop and scatter method uses a mobilized stroke delimber to delimb and buck trees at the stump, leaving tree tops and limbs on the forest floor, while a...
Climate impact studies often require the selection of a small number of climate scenarios. Ideally, a subset would have simulations that both (1) appropriately represent the range of possible futures for the variable/s most important to the impact under investigation and (2) come from global climate models (GCMs) that provide...
Full Text:
Vano, J. A., Kim, J. B., Rupp, D. E., & Mote, P. W. (2015). Selecting climate
change scenarios using
The potent antitumor agent phorboxazole A was synthesized from six subunits comprising C1-C2 (115), C3-C8 (98), C9-C19 (74), C20-C32 (52), C33-C41 (84) and C42-C46 (85). Tetrahydropyrans B and C containing cis-2,6-disubstitution were fabricated via palladium(II)-mediated intramolecular alkoxycarbonylation which, in the case of tetrahydropyran C, was carried out with catalytic palladium(II)...
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous contaminants and are mostly products of the incomplete combustion of organic material. PAHs are often found in environmental samples as a complex mixture of isomers. In addition, the same sources that produce complex PAH mixtures also produce other poorly characterized mixtures of organic compounds,...
Qualitative data analysis (QDA) is a time consuming and, potentially unreliable research activity. In qualitative research, a number of tasks must be repeated for every new research case, even if each case is closely related or is in the same area of study.
Existing QDA applications provide users with a...
Background: Previous studies suggested that the professional identity of community college faculty is less than clearly articulated. Lack of clarity with regard to professional identity may have impacts in a number of areas, including recruitment, professional development, and the overall reputation of community colleges.
Purpose: To examine how community college...
The trenchless technology known as pipe ramming for construction of culverts and buried pipes under roadways or other infrastructure has gained significant popularity due to its cost-effectiveness and ability to alleviate surface disruptions associated with open-cut trenching. Although the experience with pipe ramming is increasing, there has been remarkably little...
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment as components of fossil fuels and by-products of combustion. Defining toxicity mechanisms for this large family of multi-ring structures and substituted derivatives is a substantial challenge. Several PAHs, such as benzo(a)pyrene (BaP), are mutagenic, toxic to wildlife, and classified as probable...
Stock loss and out-of-stocks are outcomes of poorly designed inventory management systems and can lead to significant revenue losses. Inventory management systems (IMS) based on radio frequency identification (RFID) have the potential to minimize these losses if they are properly designed and deployed. However, the placement of RFID readers to...
Critical Infrastructures (CIs) such as energy, water supply, telecommunications, and transportation are highly vulnerable to cascading failures due to their interdependent operations. A resilient network is crucial to withstand the impact of functionality loss in disruptive events. This research evaluates network expansion as a proactive resilience strategy in which new...
We use autonomous gas measurements to examine the metabolic balance (photosynthesis
minus respiration) of coastal Antarctic waters during the spring/summer growth season. Our observations
capture the development of a massive phytoplankton bloom and reveal striking variability in pCO₂ and
biological oxygen saturation (ΔO₂/Ar) resulting from large shifts in community metabolism...
Full Text:
. Grzymski6, Jodi N. Young4, Sven A. Kranz4, Kim S. Bernard7,
and François M. M. Morel4
1Department of Earth
Background: Vesiviruses in the family Caliciviridae infect a broad range of animal hosts including mammals, birds, fish, amphibians and reptiles. The vesivirus Cro1 strains were isolated from diseased snakes in the San Diego zoo in 1978 and reported as the first caliciviruses found in reptiles. The goal of this study...
Understanding controls on the stable isotopic composition of precipitation and vapor in the West Pacific Warm Pool is vital for accurate representation of convective processes in models and correct interpretation of isotope-based paleoclimate proxies, yet a lack of direct observational evidence precludes the utility of these isotopic tracers. Results from...
Continuous microreactor-assisted solution deposition is demonstrated for the deposition
of CdS thin films on fluorine-doped tin oxide (FTO) coated glass. The continuous flow
system consists of a microscale T-junction micromixer with the co-axial water circulation
heat exchanger to control the reacting chemical flux and optimize the heterogeneous surface
reaction. Dense,...
Measurements
were
made
of the
energy
loss
in
a
superconducting
wire
coil
subjected
to
an
axial
magnetic
field
consisting
of
a
ripple
field
superimposed
on
a
steady
field.
The
loss
was
measured
calorimetrically
using
a
sonic
thermometer
consisting
of
a
resonance tube
filled
with
helium
gas
in
thermal
contact
with...
Field trips are well recognized by researchers as an educational approach with the potential to complement and enhance classroom science teaching by exposing students to unique activities, resources, and content in informal settings. The following investigation addresses teachers' field trip practices in three related manuscripts:
(1) A study examining the...
In this paper, we report a fiber-optic carbon dioxide (CO₂) near-infrared (IR) absorption sensor with only 8-cm sensing length that is coated with nanoporous metalorganic framework material Cu-BTC (BTC = benzene-1,3, 5-tricarboxylate). The multimode optical fiber was etched by hydrofluoric acid to remove the cladding and part of the core,...
Summertime low clouds are common in the Pacific Northwest (PNW), but spatiotemporal patterns have not been characterized. We show the first maps of low cloudiness for the western PNW and North Pacific Ocean using a 22‐year satellite‐derived record of monthly mean low cloudiness frequency for May through September and supplemented...
We demonstrate that unidirectionally aligned, free-standing multi-walled carbon nanotubes (CNTs) exhibit highly anisotropic linear and nonlinear terahertz (THz) responses. For the polarization parallel to the CNT axis, strong THz pulses induce nonlinear absorption in the quasi-one-dimensional conducting media, while no nonlinear effect is observed in the perpendicular polarization configuration. Time-resolved...
Colony size, nesting ecology and diet of Caspian Terns (Hydroprogne caspia) were investigated in the San Francisco Bay area (SFBA) during 2003-2009 to assess the potential for conservation of the tern breeding population and possible negative effects of predation on survival of juvenile salmonids (Oncorhynchus spp.). Numbers of breeding Caspian...
The nearly completed U.S. West Coast (USWC) high-frequency radar (HFR) network provides an unprecedented capability to monitor and understand coastal ocean dynamics and phenomenology through hourly surface current measurements at up to 1 km resolution. The dynamics of the surface currents off the USWC are governed by tides, winds, Coriolis...
The study of natural products (NPs) and their application has shaped humanity. Starting with the idea of using plants as medicine, it has now grown into the science of purifying and identifying organic molecules from nature to study their inherent biological activities. Understanding the molecular structures of NPs is the...
Improvements in instrumentation for fluorometric kinetic
measurements and the application of a new intensified diode array (IDA)
rapid scanning system to low level transient fluorescence measurements
are reported. This instrumentation is applied to a new fluorometric
kinetic method for thiamine (TM).
Modifications to the existing fluorometric reation rate instrument
include...
The development and optimization of a fluorometric reaction
rate method for the determination of aluminum is described.
Modifications to existing instrumentation permit automatic
monitoring and reporting of measurement conditions. Automatic
correction of measured analytical signals is provided if monitored
parameters deviate from optimum values. A computer controlled
standard addition procedure...
For the first time we report the results of a survey to determine the presence, seasonal phenology and biological control status of indigenous parasitoid populations utilizing Drosophila suzukii (Matsumura) and Drosophila melanogaster Meigen (Diptera Drosophilidae) as hosts in Trento Province, Northern Italy, and the Willamette Valley, Oregon, USA. Larval and...
The contemporary student veteran population is growing rapidly as service members who served in the Afghanistan and Iraq conflicts take advantage of the Post 9/11 Veteran Educational Assistance Act of 2008 to receive educational benefits to attend college (Cook & Kim, 2009). However, student veterans entering college today have a...
A procedure for model-assisted climate impact assessment is
developed. The approach combines data from observations and
atmospheric general circulation models (GCNs), and provides the basis
for a potentially valuable means of using information derived from
GCMs for climate impact assessments on local scales.
The first component of this procedure is...
An increasing number of studies suggest an important role of host immunity as a barrier to tumor formation and progression. Complex mechanisms and multiple pathways are involved in evading innate and adaptive immune responses, with a broad spectrum of chemicals displaying the potential to adversely influence immunosurveillance. The evaluation of...
This dissertation is composed of three essays regarding the finite sample properties of estimators
for nonparametric models.
In the first essay we investigate the finite sample performances of four estimators for additive
nonparametric regression models - the backfitting B-estimator, the marginal integration M-estimator
and two versions of a two stage...
In recent years, non-renewable and non-biodegradable plastic packaging forms the majority of landfilled waste. These products, mainly made from Polyethylene Tetraphlatate (PET) and other polyolefins, have excellent durability and barrier properties, but take hundreds of years to degrade.
Much focus has been put on developing environmentally friendly alternatives to polyolefins...
It is well established that individual organisms can acclimate and adapt to temperature to optimize their functioning. However, thermal optimization of ecosystems, as an assemblage of organisms, has not been examined at broad spatial and temporal scales. Here, we compiled data from 169 globally distributed sites of eddy covariance and...
Increasing numbers of individuals aspire to, seek out, and need a college degree in order to be competitive in the job market (Goyette, 2008; U.S. Department of Education, 2013). College degrees provide access to economic, social, and health benefits (Abel & Deitz, 2014; Autor, 2014). The United States also needs...
Nanotechnology products have long since made their way to markets around the world increasing the concerns about whether nanomaterials pose a risk to our environment or health. It has been suggested that engineered nanomaterial (ENM) with broad applications and rapid commercialization need better risk assessment and regulation. However, the refinement...
Lifestyle factors are responsible for a considerable portion of cancer incidence worldwide, but credible estimates from the World Health Organization and the International Agency for Research on Cancer (IARC) suggest that the fraction of cancers attributable to toxic environmental exposures is between 7% and 19%. To explore the hypothesis that...
Background. Total knee arthroplasty, or replacement, is a common, generally successful, and expensive procedure. Tools to predict outcomes following orthopedic procedures are abundant, yet no commonly used assessment accounts for an individual’s propensity to engage in adaptive health behavior. The 13-item Patient Activation Measure (PAM) questionnaire is a tool that...
This thesis challenges South Korea’s state-sponsored and activist-serving narratives about the Korean comfort women, who were forced to work as sex slaves in Japan’s wartime military brothels. Comfort women have provided testimonies about their wartime experiences that have drawn significant attention to the atrocities committed against them by the Japanese...
This study documents three cases of protracted conflict in an
institution of higher education. Work groups in conflict were studied for
one year in order to create cases and to describe factors influencing
conflict escalation. From these cases, autistic conflict as a descriptive
construct was developed to illustrate one phase...