In the most recent decades, there has been extensive loss of seagrasses within the Indian River Lagoon estuary on the eastern coast of Florida. This decline poses a significant threat to the ecological function of the ecosystem, as well as to the social and economic wellbeing of the surrounding communities....
This study posited that maturational growth in emotion regulation should be associated with reduction in hyperactivity during the transition into adolescence. The longitudinal design assessed emotion regulation and hyperactivity in an urban community sample of children in three waves, at ages 10.6, 11.6, and 12.6 years. A parallel growth curve...
A primary aim of bereavement research is to alleviate suffering and promote well-being at the junction of life and death for the survivor in an attachment relationship. Bereavement research in the last decade has focused primarily on examining grief recovery within the context of intrapersonal processes. This emphasis has often...
This study examined associations between participation in voluntary out-of-school programs (e.g., scouting, Boys' and Girls' Clubs, 4-H, YMCA/YWCA) in adolescence and four negative outcomes: school dropout, early sexual activity, delinquency, and drug use. A prospective longitudinal design had collected four waves of interview data on a national sample of 15,000...
There is limited knowledge regarding differential training as it relates to balance. The purpose of this study was to compare the performance and retention of a differential training balance program and a traditional balance program. Thirty-three Division I soccer athletes volunteered to participate and 29 completed the study. Participants were...
Schools are increasingly expected to prevent and decrease violence, substance use, and other problem behaviors linked to academics and prepare students to be contributing members of society. One approach with proven success in promoting positive outcomes related to a broad range of student behaviors and personal characteristics is social-emotional learning,...
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Samuel Vuchinich
Schools are increasingly expected to prevent and decrease violence
Growing concern regarding the health effects of PFAS exposure through drinking water remains an issue at the forefront of many regulatory hurdles. Current data suggests that PFAS can be the cause of many negative health effects including changes in birth weight, thyroid disease, decreased fertility, and some forms of cancer....
An increasing number of children care for
themselves (self-care) while their parents are employed
outside the home. A literature review suggested a
connection between child care concerns and employed
parents' increased stress, role overload, and lower
productivity. This study evaluated the impact of an
educational training program for families with...
This follow-up study investigated the effect of a systems-oriented graduate
training program upon system thinking among practitioners who had completed training,
using a post-test only, treatment-comparison group design. The subjects consisted of
practitioners matriculated through two counselor-related programs at a medium-sized
college in the Northwest during the years 1985-1991. A...
This research explores the barriers that prevent stakeholders from changing their hobby behaviors to help prevent the spread of invasive species in Oregon. Invasive species are increasingly causing economic and ecosystem harm in Oregon. This is among the first studies done on the human dimensions of invasive species. Using the...
Natural resource management and policy is ideally informed by the best available science. Natural resource researchers ideally participate in broader impacts activities to extend the reach of their best available research. However, there are many cultural, institutional, and practical barriers to participating in broader impact activities and to incorporating science...
Children with disabilities report some of the lowest physical activity (PA) levels among U.S. children. Estimating the magnitude of PA disparities has been previously challenged by underreporting and variability in subsampling of children with disabilities. The present research leverages the redesigned National Survey of Children’s Health to estimate population-level disparities...
The nervous system has an integral role in rapid torque production of the lower extremity, which is often necessary for proper motor response to a dynamic environment. The nervous system is complex with numerous pathways, including spinal motor control networks, which influence the ability to move. However, few studies have...
Background: The ability to produce rapid muscle force and joint torque is important for performance in sports, injury prevention and rehabilitation, and balance recovery. One way to measure rapid torque production is rate of torque development (RTD), which is the slope of the torque-time curve. Interventions aimed at increasing RTD...
The ability to quickly generate torque of the triple extensors is critical during rapid movements, especially when there is not enough time to reach peak torque. Rate of torque development (RTD), which is the rate of rise of the torque-time curve, is a commonly used measure of rapid torque generation....
Commercial utilization of pollinizing varieties of pears is important
both for pear growers and processors in Oregon. A study
was made to determine the suitability of Comice, Packam's Triumph
and Anjou, the three pollinizing varieties of pears, for dehydration, as
compared to the Bartlett variety which is commercially used for...
Purpose: Children with Down syndrome (DS) may have limited opportunities to engage in independent mobility at the same age as their typically developing peers due to motor delays. The primary purpose of this study was to examine two activity-oriented outcomes - (1) onset of independent driving, and (2) onset of...
Background: Certain knee movements place the anterior cruciate ligament (ACL) at risk of injury. These injuries commonly affect athletes especially at the end of events. The purpose of this study was to determine the effects of exhaustive exercise on frontal plane hip and knee mechanics during two tasks in order...
Physical activity is important for young children with and without disabilities. However, recent investigations have found that young children with and without disabilities spend less time in physical activity than is recommended. Family and music factors have been shown to positively affect physical activity of this population in previous studies....
Managing invasive species is vital to preserving native species and maintaining the integrity of environments and ecological roles. Rats are one of the most prolific and intrusive invasive species that have successfully cohabitated with humans over centuries as we have expanded and advanced our societies. Thus, rats have historically been...
The primary purpose of this study was to determine the effects
of an interdependent group-oriented contingency on the MVPA
levels of middle school students during the fitness portion of physical
education lessons. Participants were randomly selected target
students from three intact eighth grade classes.
A combination of a delayed multiple...
The monolithic (plate type) Uranium 10 wt.\% Molybdenum (U-10Mo) fuel system is promising for a variety of applications, most notably for the replacement of highly enriched uranium (HEU) fuels with low enriched uranium (LEU) fuel in United State High Performance Research Reactors (U.S. HPRRs).
Phase transformations and secondary phase formation...
Tide-topography coupling is important for understanding surface-tide energy loss, the intermittency of internal tides, and the cascade of internal-tide energy from large to small scales. Although tide-topography coupling has been observed and modeled for 50 years, the identification of surface and internal tides over arbitrary topography has not been standardized....
The human senses can be used as analytical tools to evaluate many different aspects of our daily lives. The use of our senses through organoleptic methods offers unique and powerful insights into the characteristics of different stimuli. Due to the unique function of the different sensory organs we use to...
Typologies of intimate violence are part of an emerging paradigm towards a multifaceted, multi-theoretical approach to understanding the causes and effects of intimate violence. For this new paradigm to be implemented into research and practice, there are several gaps in the knowledge base that must be addressed. In particular, there...
Our view of phytoplankton has historically revolved around their inability to
control their location in space. The term phytoplankton itself underscores this
particular difference between phytoplankton and their sessile terrestrial counterparts.
Yet there are other differences between land plants and the phytoplankton that are
perhaps equally important, beyond this sessile-planktonic...
Despite years of research, females continue to have a higher incidence of non-contact ACL injuries. One of the major findings of this research is that males and females perform certain tasks, such as, cutting, landing, and single-leg squatting, differently. In particular, females tend to move the knee into a more...
The European hazelnut (Corylus avellana L.) is a tree nut crop that is important in Oregon, which produces 99% of the United States’ hazelnuts but only 5% of the world’s supply. In order to maintain this market share, farmers in Oregon need cultivars that produce high quality nuts, mature early,...
Natural products (a.k.a. secondary metabolites) are produced by living organisms that are not essential for their growth, development, or reproduction, but may play a role in their survival or adaptability in nature. Many secondary metabolites isolated from plants and microbes have found use as molecular probes, drug leads, or medicine...
SH 714 (1, 2-alpha-methylene-6-chloro-delta-4, 6-17-alphahydroxyprogesterone
acetate) synthesized by Schering AG is an highly
antiandrogenic, nonestrogenic compound. The present investigation
was undertaken to determine the compound's effect upon the cell
associations of the germinal epithelium in the mature rat. From germinal epithelium for this dosage level of SH 714 was exhibited...
Six experiments were carried out with Single Comb White Leghorn laying chickens to
assess the effect of feeding a source of direct-fed microbials (Lactobacillus; Lacto) and its
carrier [condensed cane molasses solubles (CCMS)] on the retentions of fat, nitrogen and
several minerals; on the status of the pH of the...
We present an analysis of the relationship between spectral lag and luminosity in time-resolved segments of long gamma-ray bursts detected by BATSE, an experiment aboard the Compton Gamma Ray Observatory satellite. For full bursts, there is a well-established correlation between the lag, which is easily computed, and the total burst...
Distribution and life history characteristics of lacustrine-adfluvial bull trout (Salvelinus
confluentus) were described in the North Fork Skokomish River Basin (including Lake
Cushman, a reservoir) from 1994 to 1996. Day snorkeling was conducted in the river to
determine initiation of the bull trout spawning migration, abundance of spawners, and
duration...
In 2021, Oregon’s legislature passed House Bill 2021 with relative ease. House Bill 2021 is a mandate for the state’s two largest utilities to reduce carbon emissions from electricity generation on a decreasing scale, reaching 100% below baseline levels by 2040. This ambitious piece of legislation, meant to reduce the...
Changes in the diode characteristics of three different
types of diodes were studied. These were point-contact, bonded and zinc-diffused diodes. The parameters
in which measurable changes were observed were the forward
resistance, the reverse breakdown voltage, the
forward "knee" of the diode curve and the constant of
proportionality relating the...
Developing accurate predictive distribution models requires adequately representing relevant spatial and temporal scales, as these scales are ultimately reflective of the relationships between distributions and influential environmental conditions. In this research, we considered both spatial and temporal scale and the influence each has on predicting broad-scale distributions of two disparate...
The 1989 Exxon Valdez oil spill (EVOS) in Prince William Sound, Alaska provided impetus for a great deal of research into the ecosystems of the Northern Gulf of Alaska. Buried within the multitude of resulting impacts, which included hundreds of thousands of oiled seabirds and dramatic ecosystem shifts in the...
The electrical conductivity of the pyromagmas from the Northeast
Crater of Mount Etna, Sicily was measured over the temperature
range 1032°C to 1071°C and over the frequency range 1 kHz to
400 kHz. Measurements were made using a four-terminal Wenner
array in conjunction with a Wavetek Model 110B portable signal...
The hermit thrush (Catharus guttatus) and the varied thrush (Ixoreus naevius) are focal species for conservation of forested habitats in Oregon. Although habitat associations have been defined for both species, their response to changes in vegetation following wildfire has not been well studied. To help fill this information gap, I...
The properties of flash- evaporated films of GaAs
and GaP were studied in this investigation. Films were
grown at various substrate temperatures, source temperatures,
source-to-substrate distances and rates of deposition
and were evaluated as to their structural,
optical and electric properties.
It was found that substrate temperature was the
major...
Whey protein’s potential for bioactivity is well documented, but there is disagreement on the extent to which it may modulate the immune system towards decreased inflammation. Decreased inflammation is generally perceived as a beneficial bioactivity in foods as excessive chronic inflammation is linked to morbidity and mortality.
This thesis first...
Decentralizing resource control for community-based natural resource management (CBNRM) is a widely promoted scheme for natural resource governance worldwide. Researchers and policymakers have suggested that this approach has the potential to achieve positive social outcomes and succeed where centralized resource conservation has been inadequate. In reality, the powers transferred are...
The existence of generalized symmetries of Maxwell's equations in Gödel's Universe is investigated. It is shown that their existence is in turn tied to the existence of certain spinorial objects called Killing spinors.
The conformal algebra, corresponding to valence (1; 1) Killing spinors, for Gödel's Universe is discussed in detail....
The Purpose of the Study The purpose of this study was to identify the tasks performed by low-ability office employees as viewed by office supervisory personnel, and, also, to analyze these tasks. The study was conducted in Alberta, Canada. To analyze tasks performed by low-ability office employees, it was necessary...
The combined activities of diverse heterotrophic marine microorganisms significantly shape global biogeochemical cycles, but models of these activities are currently limited to aggregate microbial community processes, and it remains unclear how community structure and the functional roles of specific microbial taxa should be integrated into these models. Therefore, understanding the...
This dissertation serves as a contribution to the study of the prehistory of the Central Desert region of Baja California, Mexico. Between 2007 and 2011, a trans-peninsular archaeological survey and excavation program―the Central Desert Early Prehistory Project (CDEPP)―was completed for a portion of the Baja California peninsula extending from the...
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...
The purpose of this study was to determine the effectiveness of an in-service project for teachers of the social studies (K-12). The project was sponsored by the Region II Committee of the Oregon Council for Curriculum and Instruction (O.C.C.I.) during the period from November 1, 1966 to April 1, 1969....
The purpose of this dissertation was to explore the effect of teacher training on the nature and context of movement instruction in Oregon elementary schools. While there are numerous instructional guides and many anecdotal descriptions of classroom movement highlighting the work of movement arts specialists, to the best of our...
Oregon possesses a diversity of natural resources from the dense rain-soaked forests of the Coastal and Cascade ranges to the deep, fertile soils of the Willamette Valley to the arid and semi-arid Snake River Basin. In the Willamette Valley, water resources sustain agriculture, municipalities, hydropower, fish and wildlife, flood control,...
Measurement is at the heart of any good research project. Although Classical test theory is the most widely used measurement theory, many alternative theories have emerged in the last hundred years. Rasch modeling is one such theory and by taking a different approach to measurement holds the possibility of enhancing...
Riparian ecosystems provide critical habitat for a broad diversity of aquatic and terrestrial species. However, due to their connectivity along river corridors, and the tendency for people to build roads, infrastructure, and other settlements next to rivers, riparian ecosystems are vulnerable to colonization by invasive plant and animal species. Early...
Heparin was modified and immobilized to surface-activated silica surfaces using two different reaction schemes. End-aminated heparin was reacted with 2-iminothiolane to produce free thiol groups at the terminal ends of the heparin chains. The end-thiolated heparin was immobilized by reaction with a pyridyl disulfide activated poly[ethylene oxide]-poly[propylene oxide]-poly[ethylene oxide] triblock...
Osmotic and ionic regulation was studied in the Dungeness
crab, Cancer magister, after acute exposure to a range of five
salinities from 25% to 125% sea water (100% = 32%). Blood, urine
and muscle tissue were sampled at 24 and 48 hours after exposure.
Analyses were made of blood and...
Anterior cruciate ligament injuries are relatively common in female athletes with greater frontal plane knee motion and loading during a landing task predictive of injury. As a result, decreasing knee abduction motion and loading is important for ACL injury prevention. While increased strength of the hip abductors, extensors, and external...
The Coast Reservation of Oregon was established under Executive Order of President Franklin Pierce in November, 1855, as a homeland for the southern Oregon tribes. It was an immense, isolated wilderness, parts of which had burned earlier in the century. There were some prairies where farming was possible, but because...
A feedlot cannot retain its manure byproduct indefinitely.
Eventually some method of disposal must be used. A case study
approach to this problem confronting a cattle feeding operation
representative of those in the area was used to determine volume
relationship among different product forms in order to maximize
net revenue...
Fungi from the genus Chlorociboria are known for their production of the blue-green quinonic pigment xylindein. Extracted xylindein has been the subject of investigations ranging from fabric dying to use a coloring agent in paint, and shows potential as an organic semiconductor in organic photovoltaics (OPVs) and other technologies. However,...
Manned missions beyond low-Earth orbit present tremendous, multifaceted radiological challenges. The deep space radiation environment contains high-energy protons and heavy ions, which are not sufficiently shielded by the aluminum alloys that have historically been used in spacecraft. To address these shielding concerns, polymer-based nanocomposites have been proposed. Radiation transport simulations...
American pikas (Ochotona princeps) are considered an indicator species of climate change. Adaptations for cold climates and active winters make pikas particularly sensitive to increasing temperatures. This, combined with evidence that multiple historically occupied populations have been extirpated within the past century, contributed to American pikas becoming a focal species...
Academic achievement of adolescent children is directly associated with their success in adulthood. Little is known, however, regarding how adolescents in immigrant families academically grow over time and what factors influence the trajectories. Drawing on the National Educational Longitudinal Survey 1988 (NELS: 88), this study aimed to: 1) identify the...
In recent years interorganizational collaboration has increasingly been emphasized as an important step for addressing inefficiencies in the delivery of human services. Among the many benefits of collaboration described by human service authors are the creation of a more consumer-friendly service system, more efficient use of available resources, and avoiding...
This thesis presents a novel design for a rheometer style viscometer by implementing high temperature and inert atmospheric requirements on the device. The goals of this device are to measure the viscosity of high temperature molten salts, which are corrosive and extremely hydroscopic. It also aims to be able to...
Idaho National Laboratories recently conducted micromechanical testing of nano-recrystallized UO₂ as a part of an ongoing investigation of High Burnup Structure (HBS). The goals of the test were to determine the fracture stress, and the elastic modulus of subdivided grains within UO₂ using ion irradiation rather than neutron irradiation to...
Individuals in their 20s today have more diverse experiences with school, work, and family transitions than previous cohorts. Contemporary young adults take longer to finish school, settle into marriages or partnerships, and begin parenting; they frequently change jobs or hold multiple part-time positions. Little is known about how young adults...
There are many different organizations and agencies which share responsibility for educating the public about responsible use of aquatic and marine resources. However, organizations specifically focused on particular dimensions of water use, such as Oregon State Marine Board (OSMB), often face challenges when attempting to recruit teachers to implement educational...
The significant variation in bubble geometry, as a function of size, has fascinated scientists for hundreds of years. However, a comprehensive explanation for these observations and the underlying physics has eluded researchers. A theoretical model which describes a the relationship between forces that produce spherical cap bubble geometry has been...
Surveys of flora and fauna were conducted in riparian areas of six streams in the general vicinity of the Iron Mountain mine near Redding, California. The surveys were intended to provide part of the information needed for a natural resource damage assessment (NRDA), should such an assessment be desired at...
Two experiments examined the dynamic interaction between cognitive resources in short-term memory and bimanual object manipulation by extending recent research by Logan and Fischman (2011). In Experiment 1, 16 participants completed a bimanual end-state comfort task and a memory task requiring serial recall of 12 words or pictures. The end-state...
Previous research on academic success in biology has focused on the influence of prerequisite knowledge and cognitive ability as measured by course grades or GPA. More recently, the field has considered the influence of non-cognitive factors such as grit, defined as passion and perseverance for long term goals. Both grit...
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Kari van Zee, Committee Member, representing Department of Biochemistry and Biophysics