Forest roads alter hillslope hydrologic processes by intercepting, concentrating, and rerouting storm runoff. Current road drainage guidelines are based on minimizing erosion and do not take into account the impact of forest roads on hillslope hydrology. This work monitors ditch flow and rainfall for 10 road segments over the course...
Ice-penetrating radar produces detailed images of the internal ice layers in a glacier. Because the layers form from each year's snowfall, the curving of the internal layers is a record of the climate conditions that the glacier experienced as it flowed throughout the millennia. The Hiawatha Glacier lies on top...
Recent observations of tidewater glaciers find that the currently accepted model for predicting ice melt vastly underestimates observed melt rates. The release of pressurized air bubbles into the ocean from pores in the ice is one process that can amplify glacier melt. To incorporate this process into models, we need...
The process of leaving a work organization is difficult. Leaving an organization that you are part of as a volunteer is just as difficult. In fraternities, upperclassmen members tend to move out one year before they graduate. This is a problem that can create a leadership gap in the chapter...
As a young adult, I have been able to witness first hand just how drastically social media is changing our culture and the way that we look at things. As social media continues to become more vastly used by its members who are in many different phases of life and...
The opportunistic pathogen Pseudomonas aeruginosa possesses two LuxR-LuxI
type quorum-sensing systems that use diffusible acyl-homoserine lactone molecules to
autoinduce and coordinate expression of multiple virulence factors. We conducted a highthroughput
screen for mutants deficient in skim-milk proteolysis—a quorum-sensing
dependent phenotype—using a nonredundant transposon-insertion library representing
most nonessential genes in P....
Student problem behavior continues to be a primary concern in schools and, as resources decrease and greater burden is placed upon teachers, schools are pursuing better ways to mange student behavior. Researchers have continually found that when correctly implemented, Positive Behavior Supports (PBS) is an effective system for mitigating problem...
The South Pole ice core (SPC14), drilled in the field seasons of 2014/2015 and 2015/2016, is an intermediate length, 1,751-m ice core which preserves a 54,000-year record of past climate and atmospheric composition. The SPC14 ice core adds to the spatial grid of ice cores in Antarctica extending into the...
Individuals who have been traumatized have the opportunity to experience posttraumatic growth, conceptualized as positive changes that result from navigating highly challenging life circumstances (Tedeschi & Calhoun, 2004). The current model of posttraumatic growth (Calhoun, Cann, & Tedeschi, 2010) is based solely on cognitive-emotional processing yet by examining the role...
Emerging infectious diseases in wild animals threaten global biodiversity as well as domestic animal and human health. Their unprecedented increase in conjunction with anthropogenically induced range shifts of endemic pathogens exposes hosts to novel parasite combinations, lending urgency to research on disease dynamics in wildlife systems. In natural populations, hosts...
Since harvest levels of many of the world's fisheries are not likely to increase in
the foreseeable future, resource managers and seafood processors need to develop
improved strategies to maximize the utilization and benefits of current catches. In
addition to increasing utilization and benefits, seafood processors are subject to the...
The fishing industry in the Pacific Northwest is a dynamic and highly competitive industry that must constantly respond to rapidly changing resource, regulatory and market forces. These forces have already had a significant impact on our fisheries and will continue to do so as we learn more about the biology...
The West Coast salmon fishery presents several complexities that have received little attention in the fisheries economics literature. Two of those complexities are reviewed and analyzed in this dissertation. The first, salmon fishermen participate in alternative fisheries within a season demonstrating a complex switching behavior between different species. Second, the...
The relationship between intrinsic fish quality (fish condition before handling), production efficiency, product price, and the optimal management of commercial "wild" fisheries was explored in four companion papers. The optimal management plan-consisting of quotas and harvest schedules - would maximize the discounted net industry revenues (NPV) given a minimum biomass...
Declining harvest levels, static agency research budgets, and increasing tension among scientists, managers, and industry members are the legacy of the present research and management institutions in the West Coast groundfish fishery. Cooperative research, the active participation of the commercial fishing industry in scientific research, is receiving increased attention as...
Pacific whiting (Merluccius productus) is commercially
and ecologically one of the most important fishery resources
in the Pacific coast of the United States. The fishery
is currently going through a period of rapid and profound
transformation that could cause a substantial redistribution
of benefits among domestic users. Benefits from the...
Researchers rely on bioeconomic models to guide research and generate fishery management advice for commercial fisheries. Due partly to a paradigm shift towards ecosystem based fishery management, increasing complexity in the characteristics of the problems has meant that bioeconomic simulation models are becoming more prevalent in the fisheries literature. However...
Coastal communities in the Pacific Northwest are looking for ways to increase the diversity of their economies in order to reduce the negative impacts of cyclic economic swings. The economic base of many coastal communities is directly tied to healthy, dynamic working waterfronts through fishing, recreation, tourism, ports, and allied...
The objective of this thesis is to show that by separating the two major anthropogenic changes caused in riverine input to the north shore of the Black Sea, it is possible to describe distinct linkages between ongoing ecological changes in the Black Sea, and 1) flow reduction, and 2) nutrient...
Seafood is one of the most diverse and highly traded natural resources worldwide. Widespread evidence of increased seafood fraud and IUU fishing has placed enormous pressure on industry and governments to determine the authenticity, safety, and sustainability of seafood. The recently established US National Ocean Council has addressed several gaps...
The movement of Chinook salmon through space and time, across political boundaries, and through fisheries, creates one of the most complex marine resource management problems in the world. Information garnered from the recovery of coded-wire tags (CWTs) has been used since the 1970s to direct management decisions. Growing concern surrounding...
Rotifers and brine shrimp (Artemia) are important prey items for rearing marine fish larvae. Their availability in the water column may be reduced when they are transferred to larval rearing tanks at lower temperature. In this study, Brachionus rotundiformis (SS-type) and Brachionus plicatilis (L-type) were semi-continuously cultured and fed on...
Full Text:
THESIS OF
Thom H. Gilbert for the degree of Master of Science in Fisheries Science presented on February
Rotifers and brine shrimp (Artemia) are important prey items for rearing marine fish larvae. Their availability in the water column may be reduced when they are transferred to larval rearing tanks at lower temperature. In this study, Brachionus rotundiformis (SS-type) and Brachionus plicatilis (L-type) were semi-continuously cultured and fed on...
Full Text:
contrast, Artemia are usually purchased as cysts that are typically hatched over a 24 h period under high
Rotifers and brine shrimp (Artemia) are important prey items for rearing marine fish larvae. Their availability in the water column may be reduced when they are transferred to larval rearing tanks at lower temperature. In this study, Brachionus rotundiformis (SS-type) and Brachionus plicatilis (L-type) were semi-continuously cultured and fed on...
Because of the complicated form of the diffusion equation,
approximations are necessary to treat the energy dependence for
practical problems. The standard model is the few group approximation.
A second approximate form, the overlapping group or modal
method, is examined and more fully developed in this work to provide
an...
In this watershed assessment, the authors of the report summarized current conditions and data gaps within the Necanicum River watershed to help to identify how current and past resource management is impacting aquatic resources.
Climate change has the potential to accelerate many forms of human migration and mobility, yet almost all of the key migration outcomes of interest are determined predominantly by governance, or the norms, laws, and institutions involved in the coordination of human society. These outcomes include the decision whether or not...
The increasing demand for meals eaten away from home has increased the interest in
developing a more complete understanding of the food-away-from-home (FAFH)
consumption patterns in the United States. Previous studies have examined factors that
explain variations in FAFH expenditures in the aggregate. However, no previous
examinations have dealt with...
This thesis examines the convergence of neoliberal rhetoric across popular media, academic, and institutional discourses, and draws connections between contemporary women's travel literature and common scripts in study abroad promotion. Finding such narratives to be freighted with ethnocentric constructs and tacit endorsements of market-based globalization, I critique the mainstreaming of...
The Thomas Kay Woolen Mill operated between 1890 and 1962. The mill produced predominately woolen blankets and woolen fabrics for outerwear garments. Mission Mill Museum Association purchased the woolen mill after its closure in order to develop the property as a museum. The purpose of this study was to provide...
Nearly all birds communicate through sound, and there has been much study of avian populations and communities using song and other vocalizations. Owls are no exception as they defend territories, advertise for mates, and defend against threats using various vocalizations. However, due to their generally nocturnal habits, some owl species...
For years, the Oregon fishing industry has argued that the lack of coastal cold storage designed to handle seafood has severely limited the opportunity to develop value-added products and retain seafood industry employment. Once landed, the majority of Oregon seafood spends little time on the coast, and a large portion...
Recommendations are provided in this watershed analysis to identify actions and management decisions on the part of BLM that might improve watershed health in the Trask River watershed.
In particle induced desorption-ionization mass spectrometry the strength of an
analyte's signal under a given set of bombardment conditions is usually considered to
be representative of the analytes relative surface activity. This rationale is generally
used to explain differences in the technique's sensitivity between and within various
classes of compound....
Dormancy in seed of Festuca arundinacea Shreb. was
studied.
The
acquisition of dormancy during seed maturation was
examined and the
effect on dormancy relief by chemical and
physical treatments was
determined.
The implication of endogenous growth inhibitors
in
dormancy imposition and maintenance was assessed.
Germination responses
to temperature and growth...
The focus of this study is the American military
family. The primary purpose is to examine the family from
the paradigm of a distinct occupational subculture and,
substantiating that existence, to understand the
implications of work-family role conflict of the military
family. The objectives are to substantiate the military
as...
An evaluation was made of factors contributing to the service
failure of a 12 inch diameter cast iron water pipe in Pendleton, Oregon.
The quality of the pipe was found to be acceptable when compared to the
acceptance limits established by the American National Standards
Institute, Inc. However it exhibited...
Victoria blight, caused by fungus Cochliobolus victoriae, is a disease originally described on oats and recapitulated on Arabidopsis. Victoria blight is used as a model plant disease that conforms to an inverse gene-for-gene interaction. C. victoriae virulence is dependent upon its production of victorin, a host-specific toxin that induces programmed...
Market issues are often critical to the regional and national benefits that can be generated from fisheries management. In actual policy analysis, however, market considerations are often treated as exogenous to the fisheries policy problem. Examples illustrate the relationships between product characteristics, market demand, and regulatory management. A multiple-objective socioeconomic...
The vegetative communities in the subalpine meadows of Hunts
Cove, Mt. Jefferson, and some of the major environmental factors
affecting them were studied in the summer of 1971. Hunts Cove is in
the subalpine Tsuga mertensiana parkland of the Central Oregon High
Cascades. Habitats within the Cove vary considerably; elevation...
The effects of estrogen treatment on uterine weight, uterine
nucleic acid content and adrenal weight were studied. Daily doses
of 0.05μg or 0.1 μg of Estradiol 17-β were administered subcutaneously
to seven day castrated female rats for periods varying
from 0 to 168 days. After two days of treatment uterine...
Problem
While the primary emphasis of this study was on the professional
aspects of a business teacher's preparation, by necessity it was
concerned with other aspects of the preparation of business teachers,
especially as these relate to the so-called "professional sequence."
Thus the purpose of the study was to seek...
Thirteen different habitat parameters were measured either quantitatively or
qualitatively around seven different Salix (willow) species on a defined reach of stream
on the southwestern slope of Steens Mountain in southeastern Oregon in order to both
broaden the current information base of riparian ecology and inform future willow
plantings aimed...
The ski areas of Oregon and Washington are similar in
many [respects], especially in that they are predominately local day
areas and are located on United States Forest Service lands. The
demand for more ski facilities is apparent yet the number of new
areas opening has decreased over the years....
Minimizing the number of product terms in a PLA implementation is a large step
towards saving area on a VLSI chip using PLA logic. Due to the large amounts of computer
time necessary to achieve this minimization, a number of heuristic approaches have
been developed to provide near-optimal solutions in...
This research was designed to test the applicability of commonly
accepted market structure theory to firm behavior within
agricultural processing industries. The research was primarily
concerned with testing the influence of relative firm size on discretionary
management decisions. Statements from economic theory
concerning structural influences on behavior comprised the hypotheses....
Negative emotional states are common for injured athletes, yet a 2016 survey suggested that only 38.3% of NCAA institutions had a full or part-time mental health professional (Kroshus, 2016). In considering the lack of support for mental health conditions in NCAA institutions, and the mental and psychological issues that come...
A mix-culture of methanogenic and sulfate-reducing bacteria was capable of degrading trichloroethylene (TCE) to dichloroethylene (DCE). The culture was incubated under anaerobic conditions within a soil sample taken from Gilbert-Mosley site, Wichita, Kansas. To stimulate the growth of indigenous bacteria, a carbon and energy source was added in this microcosm...
As screen resolution and video decoding capability have increased, high-definition (HD) video in resolutions as high as 1920 x 1080 is rapidly becoming the standard. Ad-hoc streaming of HD video over 802.11 wireless networks, e.g., streaming from a mobile device to a television, is convenient for users, but is hampered...
The United States of America and the world are faced with three massive intertwining challenges at this time: COVID-19, racial inequity, and climate change. As a species, humans must come together and collectively address these challenges to preserve our humanity and make our world a more just and livable place...
Changes in glacier length reflect the integrated response to local fluctuations in temperature and precipitation, but when do such changes indicate forced climate change, and when do they indicate natural variability? In this study, we simulate the past ~1000 years of glacier length variability across the globe using the 3-stage...
The southern San Andreas fault (SSAF) is the fault segment with the highest 30-year probability of causing a moderate to large magnitude earthquake in California, yet key structural characteristics of the fault remain unconstrained, particularly in the Coachella Valley where the fault splits into the Banning (BF) and Mission Creek...