The objective of this project is to demonstrate the feasibility fiber-reinforced turbine components through a design and manufacturing study. The motivation for using composites is to reduce weight and simplify manufacturing especially at high production volumes. In addition, natural fiber composites are implemented for applicable components to reduce environmental impact....
Wild salmon populations are in decline in the Pacific Northwest. In the region populations and runs of Chinook (Oncorhynchus tshawytsha), Chum (Oncorhynchus keta), Coho (Oncorhynchus kisutch), Sockey (Oncorhynchus nerka), and Steelhead (Oncorhynchus mykiss) have been listed as threatened and/or endangered under the Endangered Species Act (ESA) in the U.S. and/or...
Primary monolayer cultures of chick renal epithelial cells
grown on plastic coverslips were reversibly dissociated with the
chelating agent ethylenediaminetetraacetic acid (EDTA). The cellular
responses during dissociation and reaggregation in Hank's balanced
salt solution (BSS) were observed with phase optics and recorded
by time-lapse cinemicrography.
The epithelial cells grow as...
We develop econometric models to jointly estimate revealed preference (RP) and stated preference (SP) models of recreational fishing behavior and preferences using survey data from the 2007 Alaska Saltwater Sportfishing Economic Survey. The RP data are from site choice survey questions, and the SP data are from a discrete choice...
Gulf of Mexico oyster safety is a significant health issue, ranking as the fourth leading cause of foodborne death in the United States. Seafood traceability is an approach that can be used to increase oyster safety. Traceability is the ability to follow seafood through all stages of production, processing and...
Many of the coastal counties in Florida have active artificial reef
deployment and monitoring programs. These reef systems have been
shown to be an important destination for the marine recreational boating
industry, as well as for the for-hire commercial sector (i.e., six-pack charter
vessels, guide boats, party/head boats, and dive...
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...
Stream water temperature (tₛ) is a critical water quality parameter for aquatic ecosystems. However, tₛ records are sparse or nonexistent in many river systems. In this work, we present an empirical model to predict tₛ at the site scale across the USA. The model, derived using data from 171 reference...
A Sebastes-specific complementary DNA (cDNA) microarray was developed to identify potential biomarkers involved in the capture stress and recovery of Sebastes species if they are assisted in returning to their original depth of capture following barotrauma. Black rockfish Sebastes melanops were exposed to simulated decompression from 450 kPa (c. 35...
John Archibald Wheeler (09 July 1911- ) is a familiar name to physicists and historians of physics alike. Among his many contributions to the corpus of knowledge, in 1939 John Wheeler and Niels Bohr co-authored the first paper on the generalized mechanism of nuclear fission. Beyond that seminal work, Wheeler...
Although most eastern North Pacific (ENP) gray whales feed in the Bering, Beaufort,
and Chukchi Seas during summer and fall, a small number of individuals,
referred to as the Pacific Coast Feeding Group (PCFG), show intra- and interseasonal
fidelity to feeding areas from northern California through southeastern Alaska. We
used...
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Richard,
K.
R.,
H.
Whitehead
and
J.
M.
Wright.
1996
Although most eastern North Pacific (ENP) gray whales feed in the Bering, Beaufort,
and Chukchi Seas during summer and fall, a small number of individuals,
referred to as the Pacific Coast Feeding Group (PCFG), show intra- and interseasonal
fidelity to feeding areas from northern California through southeastern Alaska. We
used...
Traditional readings of George Bernard Shaw's texts suggest that he is not a pure
Marxist socialist because of the spiritual and nationalist aspects of his vision. This thesis
attempts to confront Shaw's politics in order to demonstrate that he indeed offers a viable
socialist program. Overlaying his socialism with Louis...
There is little, if any, direct fossil evidence of the cardiovascular, respiratory, reproductive or digestive biology of dinosaurs. However, a variety of data can be used to draw reasonable inferences about the physiology of the carnivorous theropod dinosaurs (Archosauria: Theropoda). Extant archosaurs, birds and crocodilians, possess regionally differentiated, vascularized and...
Respiratory illnesses caused by both viral and bacterial infection are serious issues for global healthcare providers. With the emergence of new, drug-resistant forms of these diseases, innovative drugs and treatment therapies are needed. M tuberculosis is an infection that affects a large portion of the world’s population each year. Aerosol...
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John Mata
Respiratory illnesses caused by both viral and bacterial infection are
Salal is plant species that is native to forestland throughout the PNW and northern California that has been identified as a competitor to early crop tree development. This study consisted of a field and a radioisotope laboratory study to test four commonly used herbicides on salal (imazapyr, triclopyr, glyphosate, and...
Obesity affects one out of every four Americans and represents a
serious health hazard in the United States. Serious chronic diseases
associated with obesity include heart disease, cancer, and adult-onset
diabetes mellitus. There has been a rapid expansion in the number of
weight control centers since the 1970s, yet there...
In the Western United States where 50-70% of annual precipitation comes in the form of winter snowfall, water supplies may be particularly sensitive to a warming climate. We worked with a network of stakeholders in the Big Wood Basin, Idaho, to explore how climate change may affect water resources and...
Monitoring wildlife habitats has become important to forest ecosystem management because it provides valuable information about the response of forests and their species to harvest practices, impacts from recreational use, conservation efforts, and natural and human-caused disturbances. Monitoring is a complex task that requires a variety of abiotic and biotic...
Runoff from agricultural lands into Upper Klamath Basin rivers and lakes can
cause water quality problems affecting fish and wildlife. Excessive eutrophication
in Upper Klamath Lake is linked to high nutrient input (particularly phosphorus)
stemming from both lake sediments and watershed tributaries.
On a unit area load basis the Wood...
Legume cover crops can serve as important sources of nitrogen (N) in sustainable agriculture and can be economically beneficial when fertilizer inputs are reduced without a yield reduction. Synchronizing N mineralization from organic materials with the needs of the subsequent crop is a challenge for organic growers.
Predicting plant available...
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John M. Luna
Legume cover crops can serve as important sources of nitrogen (N) in
The first part of the dissertation is to evaluate the use of proposed and established equations for area under the plasma concentration versus time (AUC) for molecules undergoing nonlinear Michaelis–Menten pharmacokinetic elimination. The effects of varying Michaelis-Menten parameters, rate of drug absorption, or bioavailability on the predictability of drug exposure...
Since the 1930's, many fields on the Crooked River National grasslands have been seeded to crested wheatgrass (Agropyron desertorum). While some of these fields remain dominated by crested wheatgrass others had a greater presence of deep rooted native perennial grasses such as bluebunch wheatgrass (Pseudoroegneria spicata). Twenty eight fields previously...
Freshwater provided from river discharge influences the dynamics and circulation of most continental shelves around the world. It has profound effects on the transport and fate of materials and substances originated from rivers and estuaries, as well as on the ocean biogeochemistry and marine ecosystems. The effect of buoyancy forcing...
This analysis concerns the life and scientific work of Henry
Augustus Rowland (1848-1901), organizer and the first chairman of
the physics department at The Johns Hopkins University in 1876.
Special materials used in this research included three pieces of
Rowland's experimental apparatus which are extant in the Smithsonian
Institution Division...
The primary objective of this study was to assess radiator repair shops' compliance with Oregon OSHA Lead and Hazard Communication regulations. Fifty radiator repair shops were randomly selected from nine counties that comprise the highest population density in Oregon. All 50 worksites were visited; of these 50 worksites, 22 were...
Energy input comparisons between tillage systems; evaluation of the value of legumes as part of a cover crop mixture used in strip-till sweet corn production; evaluation of the nitrogen contribution of legume-based cover crops to organic vegetable production.
The structure of engineering curricula currently in place at most colleges and universities has existed since the early 1950's, and reflects an historical emphasis on a solid foundation in math, science, and engineering science. However, there is often not a close match between elements of the traditional engineering education, and...
Full Text:
Abstract approved:
AN ABSTRACT OF THE DISSERTATION OF
John E
The contribution of delayed adaptive reiteration to crown maintenance was explored across a wide range of adjacent open space conditions in early-mature (approximately 60 year old) Douglas-fir located on the eastern slope of Oregon’s Coast Range. The stands had experienced uniform thinning in 1964-65 and 1980-81 to release dominant and...
The goal of this dissertation was to improve our abilities in acquiring critical in vivo data by establishing embryo-larva zebrafish as an exemplary model to quantitatively evaluate cancer progression. The living environment that encompasses a tumor has a significant effect on how cancer develops, grows and metastasizes. In order to...
The extent of agricultural drainage has created concern for its potential undesirable effects on surface water quality. Land applications of liquid manure on tile drain fields have the potential to transport solutes and bacteria to the drains following precipitation or irrigation events and many times are directly sent to a...
A root-lesion nematode, Pratvlenchus penetrans, was determined to
be a major component of peppermint stand decline in Western Oregon.
Regression analysis showed that P. penetrans root densities in August
were negatively correlated (P=0.01) with yield, while soil densities
in August and root and soil densities in April were poorly correlated...
This retrospective study investigated the incidence, characteristics, and
risk factors of bone fracture among a group of 518 adults with severe mental
retardation between 25 and 75 years old. Data were collected from a large state
developmental center in the Western United States between April 1, 1991 and
March 31,...
For many species of oceanic dolphins, photo-identification and genetic data indicate that these island-associated populations are demographically isolated from pelagic populations and that island-associated populations exhibit very different patterns of movement and habitat use. Melon-headed whales (Peponocephala electra) are generally considered a pelagic dolphin, but have been documented around oceanic...
This study was conducted to discover whether two elementary
school districts, one committed to career education and the other not
committed, would show a significant difference in their response to
60 statements about career education and its practice. The study
was also designed to determine to what degree students and...
Beetle diversity and habitat associations of five
prevalent riparian plant communities were examined along
the lower reaches of Big Beaver Creek Research Natural
Area, North Cascades National Park, Washington. These
communities were defined by dominant tree species, and
included Alder Swamps, Cedar-Hemlock Forests, Douglas-fir
Forests, Gravel Bars, and Willow-Sedge Swamps....
Eight postemergence herbicides were evaluated to determine
their influence on the incidence and severity of take-all disease
caused by the fungus Gaeumannomyces graminis var. tritici in winter
wheat. Mecoprop ((+)-2-(4-chloro-2-methylphenoxy)propanoic acid),
difenzoquat (1,2- dimethyl- 3,5- diphenyl -1H- pyrazolium), dinoseb amine
(amine salt of 2-(1-methylpropy1)-4,6-dinitrophenol), and diclofopmethyl
(methyl ester of (+)-2-[4-(2,4-dichlorophenoxy)...
Cephalosporium stripe (Cephalosporium gramineum) is an important disease limiting adoption of conservation tillage practices in the Pacific Northwest. The disease can cause severe loss of grain yield and quality in winter wheat (Triticum aestivum L.). Modified cultural practices can reduce disease incidence, but are not always dependable because of variation...
Research has shown that college students sit above the global average for levels of physical inactivity. Currently, there are attempts to assuage this by using motivational theories to encourage physical activity. This, however, is being met with limited success. Therefore, it is now necessary to cast a broader net across...
Relationships between myosin heavy chain (MHC) isoform content and
eccentric-induced damage were investigated in chemically skinned muscle fiber
segments. Fibers were subjected to an eccentric contraction standardized for strain
magnitude (0.25 fiber length) and velocity (0.50 maximal shortening velocity).
Fiber MHC isoform content was identified by SDS-PAGE. Pre- to post-eccentric...
Understanding the tradeoff between water use and productivity is critical for modeling growth of intensively managed Douglas-fir forests in the Pacific Northwest. Evapotranspiration is closely linked to carbon dioxide intake during the process of photosynthesis. However, summer drought characterizing the growing season in this region imposes a limit on carbon...
Two studies were conducted to evaluate the influence of supplement composition on intake and digestibility of a low-quality (< 6% CP), cool-season forage, as well as cow performance. Treatments included a non-supplemented control (CON), corn (approximately 8% CP), corn and urea (LU = corn + 0.09 mg/kg BW urea, approximately...
Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), a shade intolerant species, and western hemlock (Tsuga heterophylla (Raf.) Sarg.), a shade tolerant species, were compared to learn more about the temporal pattern of release from suppression in both species, whether hydraulic architecture or photosynthetic capacity constrain release and how wood functional properties change...
This study examined the behaviors relating to the utilization
of prescription and over-the-counter medications in a small group
of elderly subjects in the 65 years and over age range. This group
was attending an Elderhostel at Western Oregon State College
during the summer of 1991, when the information was obtained....
A critical component in diabetes management is diabetes self-management education (DSME). Additionally, poor self-management behavior and negative health outcomes are associated with participants that do not complete diabetes education (Gurdiacci et al., 2007). Despite the widespread use of DSME, many do not obtain the wide range of benefits these programs...