Groundwater–surface-water (GW-SW) interactions in streams are difficult to quantify because of heterogeneity in hydraulic and reactive processes across a range of spatial and temporal scales. The challenge of quantifying these interactions has led to the development of several techniques, from centimeter-scale probes to whole-system tracers, including chemical, thermal, and electrical...
The effect of ultra-high pressure on the thermal emf of a
chromelialumel thermocouple is investigated using an indirect
method which does not require a direct knowledge of the temperature
of the pressurized junction. The unknown temperature is written
parametrically as a function of a directly measured quantity, the
electrical power...
The base Al-Zn superplastic alloy was investigated at 250°C to
determine the effect of small amounts of magnesium on mechanical
properties. Six alloys of nominal composition 0.00, 0.10, 0.25,
0.50, 0.75, and 1.00 weight percent magnesium, constant 78 weight
percent zinc, and variable 21 to 22 weight percent aluminum were...
The structure, hardness, and impact strength of high chromium
cast irons was investigated. From the Fe- Cr- C phase diagram,
a composition with 74.8 wt% Fe, 21.5 wt% Cr, and 3.7 wt% was
selected along the austenite-M₇C₃ eutectic trough. This composition
was bracketed by others with slightly different amounts of...
A necessary condition for successful management of fisheries is that fishermen follow the rules and regulations put in place. A survey was designed to ask anglers about their attitudes towards various recreational fishing rules and regulations, as well as to what extent the different regulations were complied with. Moreover, we...
The paper explores to what extent escaped farmed salmon from fish farms affect the willingness-to-pay for recreational fishing of Atlantic salmon in Norwegian rivers. The aim is to quantify the potential externality from escaped farmed species working through the demand for the natural stock of congeners. While the biological and...
A general theory of micromorphic materials was developed by
Eringen for the prediction of continuum behavior of materials with
inner structure, such as, granular solids, composite materials,
anisotropic and polymeric fluids. Recently Eringen derived balance
laws of micromorphic mechanics from a different point of view. His
derivation of the master...
This paper explores the optimal management strategies of two species with different life history traits. Here we consider a prey-predator relationship which may represent a resident species and an invasive species. They have different life history traits and interact by competing food and space and predation in the same ecosystem....
Zebrafish (Brachydanio rerio) are small, freshwater teleost fishes in the family
Cyprinidae, the true minnows. They are native to the tropical latitudes of India, but
have become widespread through their use as aquarium fish and as models for several
branches of biological research. Their ease of rearing, short generation time,...
Resazurin (Raz) and its reaction product resorufin (Rru) have increasingly been used as reactive tracers to quantify metabolic activity and hyporheic exchange in streams. Previous work has indicated that these compounds undergo sorption in stream sediments. We present laboratory experiments on Raz and Rru transport, sorption, and transformation, consisting of...
The objective of this study was to further determine the distribution of
selenoprotein W (SeW) in tissues from rats and sheep fed different selenium levels and to
search for the possible functions of this protein. In the rat study a total of 28 rat tissues
were examined and SeW was...
Exposure to TCDD suppresses the generation of immune responses through unknown mechanisms. Interestingly, TCDD enhances inflammatory responses to various stimuli. The goal of the studies presented in this thesis was to examine the role of hyperinflammation in TCDD-induced immunotoxicity. Previously we observed an increase in Mac-1⁺ cells in the spleen...
Individual quota (IQ) management systems in commercial marine fisheries are highly diverse, differing in the security, durability and exclusivity of the harvesting privilege and the transferability of quota units. This diversity in the degree of harvest rights may influence the effectiveness of IQ fisheries to meet management objectives. We conducted...
Full Text:
management objectives?
Michael C Melnychuk1, Timothy E Essington1, Trevor A Branch1,†, Selina S Heppell2
Individual quota (IQ) management systems in commercial marine fisheries are highly diverse, differing in the security, durability and exclusivity of the harvesting privilege and the transferability of quota units. This diversity in the degree of harvest rights may influence the effectiveness of IQ fisheries to meet management objectives. We conducted...
Full Text:
elements of individual quota fisheries help to achieve
management objectives?
Semideviation as a third
Individual quota (IQ) management systems in commercial marine fisheries are highly diverse, differing in the security, durability and exclusivity of the harvesting privilege and the transferability of quota units. This diversity in the degree of harvest rights may influence the effectiveness of IQ fisheries to meet management objectives. We conducted...
Individual quota (IQ) management systems in commercial marine fisheries are highly diverse, differing in the security, durability and exclusivity of the harvesting privilege and the transferability of quota units. This diversity in the degree of harvest rights may influence the effectiveness of IQ fisheries to meet management objectives. We conducted...
Rights-based approaches are potentially promising tools to meet conservation objectives in natural resource management. Here, we evaluated how population status and fishery production respond to catch shares, a rights-based policy instrument in fisheries whereby participants are granted a right to harvest a fraction of the allowable catch. By analyzing time...
Fisheries management based on catch shares – divisions of annual fleet-wide quotas among individuals or groups – has been strongly supported for their economic benefits, but biological consequences have not been rigorously quantified. We used a global meta-analysis of 345 stocks to assess whether fisheries under catch shares were more...
Resazurin (Raz) and its reaction product resorufin
(Rru) have increasingly been used as reactive tracers to quantify
metabolic activity and hyporheic exchange in streams.
Previous work has indicated that these compounds undergo
sorption in stream sediments. We present laboratory experiments
on Raz and Rru transport, sorption, and transformation,
consisting of...
Full Text:
resorufin in natural river sediments
D. Lemke et al.
Correspondence to:O. A. Cirpka (olaf.cirpka@uni
Some of the problems concerning the present educational programs
which confront the institutions of higher education are, reviewed.
Resources allocation is at the root of the issue.
Budgeting orientations are presented with special emphasis on
Planning Programming Budgeting Systems. PPBS is still in its
developmental stage in the field of...
After three decades of active research coupling hydrology and stream ecology, the connection among solute transport, metabolism and processing is still unresolved. These knowledge gaps obscure the functioning of stream ecosystems and how those ecosystems interact with other landscape processes. We must resolve these challenges to wisely manage water resources,...
A multivariable model describing the system response
(weld tensile strength of 6061-T6 aluminum) of a percussive
stud welding system as a function of five natural
(external) system variables was developed. The five natural
system variables were 1) static weight of the drop-shaft (W), 2) initial stud base height (H₀), 3)...
Ph.D. candidate Qi Wei's thesis consists of two projects: Chemotherapy Project: a study based on the research paper "Predicting chemotherapy response of various cancer types using a variational auto-encoder approach" submitted to the bioRxiv preprint archive and accepted by the BMC bioinformatics; and Wound Monitor Project: implementing and assessing analytics...
The rising global trend to reduce dependence on fossil fuels has provided significant motivation toward the development of alternative energy conversion methods and new technologies to improve their efficiency. Recently, oscillating energy harvesters have shown promise as highly efficient and scalable turbines, which can be implemented in areas where traditional...
This study determined the importance of specific research tasks to the present job requirements of State Department of Education professionals, college and university instructional faculty, and secondary school counselors in Oregon. The instrument utilized in the research was designed and validated through a Delphi process. The computed reliability coefficient was...
Changes in climate caused by increased concentrations of carbon dioxide (CO₂) in the Earth’s atmosphere have led land and ocean surface temperatures to increase by 0.85°C and sea level to increase by 19 cm relative to preindustrial times. Global climate change will lead to further alterations in mean temperature and...
Indole-3-carbinol (I3C) is a naturally occurring plant alkaloid, found in significant concentrations in cruciferous vegetables such as broccoli and Brussels sprouts. I3C is an unstable compound that undergoes rapid oligomerization in an acidic environment to form higher order condensation products (I3C-ACPs), such as 3-3'-diindolylmethane (DIM). Both I3C and DIM are...
The omnivorous ground beetle, Pterostichus melanarius Illager (Coleoptera: Carabidae), is a ubiquitous inhabitant of western Oregon crop land. Because it is often the most abundant ground beetle, and attains densities that could lead to serious impacts on its prey sources, I sought to understand the overall diet composition, and specifically...
Deep learning has recently revolutionized robot perception in many canonical robotic applications, such as autonomous driving. However, a similar transformation has yet to occur in more harsh environments including underwater and underground. This is due in part to the difficulty in deploying robots in these environments, which lack large real...
Monocrotaline (MCT) is a member of a class of naturally occurring
phytotoxins known as pyrrolizidine alkaloids (PAs). Exposure to PAs can result
in liver and cardiopulmonary lesions as well as lymphoid organ atrophy. In the
present study C57BI/6 (B6) mice received MCT (0-150 mg/kg/day, po) for 14
days. Overt toxicity...
Emerging applications for robotic data collection include ocean monitoring, emergency response and urban search and rescue. At the core of these applications is a robot's ability to make informed decisions on incomplete data. This dissertation addresses this problem by developing novel techniques for modeling and estimating structured environments using deep...
The development and some applications of holographic optical tweezers (HOT) are presented. Our HOT system uses a spatial light modulator (SLM) to control the location and properties of the optical trap. We have developed a method for optimizing the diffraction efficiency of a SLM that can be applied in situ...
The two-fold purpose of this study was to identify critically important factors that affect the
meaningful assessment of student learning outcomes and study why they were critically
important. A three-round Delphi process was used in both a pilot project and in a full study to
solicit the opinions of individuals...
Background: Calls by presidents and legislators to raise the U.S. college graduation rate to 60% by 2025 have required educational institutions to find ways to increase accessibility and quality while simultaneously reducing costs (Bautsch, 2018; Smith, 2017). Private foundations such as the Bill and Melinda Gates Foundation are getting involved...
Aquifers are an important storage location and source of fresh groundwater. They may become polluted by a number of contaminants including mobile divalent radionuclides such as strontium-90 which is a byproduct of uranium fission. A method for remediating such divalent radionuclides is sequestration through co-precipitation into calcium carbonate. Calcium carbonate...
The fish processing industry is the most important
industry in Iceland. The single most important
processing method is quickfreezing, and the major market
is in the United States. With increasing competition in
the market from countries like Canada, productivity of
fish processing plants is becoming increasingly
important.
This research focuses...
The Tumalo Project at Tumalo Reservoir in Central Oregon was proclaimed a failure almost as soon as it was completed. As the reservoir filled with water diverted from Tumalo creek in the spring of 1915, sinkholes developed in the reservoir floor and every last drop of captured water disappeared into...
The Eastern California Shear Zone (ECSZ) is a broad zone of dextral shear inboard of the North American - Pacific plate boundary. Despite decades of study, the significance of a mismatch between geodetic velocities and geologic fault slip rates across the ECSZ remains incompletely understood. Geodetically determined interseismic strain across...
An increase in anthropogenic activities since the industrial revolution, primarily due to burning of fossil fuels and changes in land cover, has resulted in a steady increase in the global mean atmospheric CO2 concentrations. While there is unequivocal scientific evidence on global warming and its multidimensional impacts on natural and...
Oregon Biography Index is intended to serve primarily as a starting point in locating biographies of Oregonians. We have indexed 47 historical volumes which are either entirely devoted to biographies or have large self-contained biographical sections. The profiles in the books vary widely in accuracy and detail. Birth dates of...
In this technical note, a steady-state analytical solution of concentrations of a parent solute reacting to a daughter solute, both of which are undergoing transport and multirate mass transfer, is presented. Although the governing equations are complicated, the resulting solution can be expressed in simple terms. A function of the...
It is desirable for complex engineered systems to perform missions efficiently and economically, even when these missions' complex, variable, long-term operational profiles make it likely for hazards to arise. It is thus important to design these systems to be resilient so that they will actively prevent and recover from hazards...
The purpose of this study was to understand how adult learners in an online teacher licensure program selected and used learning strategies, transformed existing strategies or developed new strategies. Also examined was whether the environment itself facilitated or impeded usage of transformed strategies, or development of new strategies. Participants in...
CoprHD is an open source software-defined storage and API platform which creates an abstraction layer over multi-vendor heterogeneous storage systems. It offers the ability to discover, pool and automate the management of the storage ecosystem with the help of storage drivers establishing connections between CoprHD and storage systems. On the...
The aim of this paper is to assist teaching undergraduate students how to analyse the issue of fish stock investment. The mathematical prerequisites are a basic knowledge of calculus. Both discrete and continuos time frameworks are used. To fish down or to build up a fish stock takes time, and...
An extensive literature survey investigated methods and approaches
for evaluating intangible economic factors at the strategic
and tactical levels of managerial decision making. These sources
provided: 1) the background for a theoretical decision making
algorithm developed for comparing alternative economic proposals
for effectiveness at the strategy levels, and 2) a...
The rapid disruption of tropical forests probably imperils global biodiversity more than any other contemporary phenomenon¹⁻³. With deforestation advancing quickly, protected areas are increasingly becoming final refuges for threatened species and natural ecosystem processes. However, many protected areas in the tropics are themselves vulnerable to human encroachment and other environmental...
Influence of abiotic and biotic factors were examined in selected
winter wheats previously identified as representing a range of
responses to septoria infection. In the greenhouse two and three
inoculations identified resistance when disease severity was assessed
either for the top four leaves or the flag leaf respectively. Kernel
number...
The objective of this dissertation is to enhance the monitoring of forest ecosystems through the utilization of remotely sensed data to address the exigencies posed by the Anthropocene. On a global scale, rising temperatures and fluctuating precipitation patterns have strained forests and produced shifts in natural disturbance regimes. Additionally, the...
Published January 1993. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
During the discovery and description of seven New Zealand methane seep sites, an infaunal assemblage dominated by ampharetid polychaetes was found in association with high seabed methane emission. This ampharetid-bed assemblage had a mean density of 57,000 ± 7800 macrofaunal individuals m⁻² and a maximum wet biomass of 274 g...
The Sortase A (SrtA) enzyme is a potential target for a new class of anti-infective drugs
because it is responsible for anchoring virulence factors to the surface of pathogenic,
Gram-positive bacteria such as Staphylococcus aureus. High throughput screening
yielded low molecular weight compounds that inhibit purified SrtA from S. aureus....
To ensure the long-term conservation and sustainable use of straddling fish stocks, the 1995 United
Nations Fish Stock Agreement calls for the establishment of regional fisheries management organizations
to manage such stocks. This paper studies the potential for cooperation in straddling stock fisheries when
the cooperative coalition of countries acts...
The selective masking effect of a thermally grown layer of silicon
dioxide has been widely utilized as a technique for controlling the
geometry and impurity concentration in semi-conductor device technology.
It is also recognized that the passivation of the silicon surface
by the vitreous silicon dioxide envelope protects the underlying...
Vietnam’s marine fisheries are in need of knowledge-based management. This necessitates the establishment of
reliable indicators, which in turn entails a good data collecting and processing system. To bridge the gap between
specific requirements for fisheries policy development and the limited resources available, we have conducted a
study on costs...
This research identified the core related tasks
necessary to graduates with majors in the field of
correctional counseling. The focus was toward job
performance needs in the field. Data were gathered
from a random sample of 151 respondents who
represented employed correctional counselors in the
state of Oregon.
The fifteen...
Published December 1976. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
An experimental technique employing a moveable Mach-Zender
interferometer for measuring composition profiles in the gas phase
of an Arnold diffusion cell has been developed. The experimental
apparatus included a specially built cell having a pair of glass sides to
allow continuous detection of the refractive index. With the integrated
apparatus,...
The variety of natural disasters provide different sets of characteristics and properties with unique challenges. One significant difference between hazard types is prewarning lead time, the amount of time individuals have from a potential warning to the disaster occurring. Rapid onset disasters may not provide an official warning about a...
Determining how the frequency, severity, and extent of forest fires are changing in response to changes in management and climate is a key concern in many regions where fire is an important natural disturbance. In the USA the only national-scale fire severity classification uses satellite image change-detection to produce maps...
The primary purpose of this study was to develop guidelines for
planning a preservice preparation program which would encompass the
critical issues in community college teacher education identified in
the related literature and by national and state authorities. The
secondary purpose was to suggest a plan for a community college...
Computers using the tagged-token dataflow model are among the best candidates for delivering extremely high levels of performance required in the future. Instruction scheduling in these computers is determined by associatively matching data-bearing tokens in a Waiting-Matching Unit (W-M unit). At the W-M unit, incoming tokens with matching contexts are...
Through a desk-top analysis, this research shows that South African women have gained and utilize specialized skills, behaviors, and adaptations through their daily activities which are useful when applied to water resource management. Further, South African women are shown to build and draw on social capital as a way to...
The purposes of this study were to identify the common elementary
education competencies necessary for a Master's degree curriculum in
Thailand as perceived by elementary education instructors in
universities and colleges, by elementary school teachers, and by
principals, supervisors, and administrators in Thailand; to determine
the common clusters of selected...
This thesis presents an experimental study of radial porosity in a manually filled cylindrical container with glass spheres. The symmetric distribution of bead diameter allowed for normalization of container properties and porosity models. The aspect ratio of the container was approximately 3.9, with tube-to-particle-diameter ratio λ ≈ 24.6 and height-to-particle-diameter...
Student parents are a growing population within college and university campuses. Though their numbers continue to grow, there is no proportionate growth in resources from the universities that are available to them. Issues like this and others that student parents face due to their unique identity were amplified in the...
The purposes of the study were: 1) to describe and analyse the
search for the meaning and purpose in life and its implications for
education; 2) to assess the degree of development of the purpose
in life among Korean high school seniors; 3) to determine whether
there were significant purpose...
Physics sensemaking is a growing topic of study within the physics education community. Many lenses have been used to study sensemaking but few have considered how time and instruction can impact student sensemaking practices and ideas. In this dissertation, I present four studies that address four major questions: What sensemaking...
The purposes of this study were to determine which research tasks
were necessary to the job descriptions of public school
administrators, secondary and elementary teachers; what task clusters
could be identified for college and university curriculums; what
differences existed between sample groups.
The instrument was validated through the Delphi technique....
Simulated Annealing and Threshold Accepting are two stochastic search algorithms that have been successfully used on a variety of complex and difficult problem sets. Due to their stochastic nature they are not guaranteed to produce the same result for each run. This means that these techniques actually produce a distribution...
A meaningful application of Mo as a paleo-redox proxy requires an understanding of Mo cycling in modern reducing environments. Stagnant euxinic basins such as the Black Sea are generally regarded as model systems for understanding euxinic systems during early Earth history. However, drawing direct parallels between the Black Sea and...
This research evaluated the statistically-related
computer application tasks which were deemed to be important
to the graduate curriculum of doctoral students who
major in Education. Data were gathered from samples of
foreign (N=22) and American (N=117) students who held
degrees in Education from Oregon State University.
The sixteen (16) item...
Surface water and groundwater interactions are a key component in the functioning of stream ecosystems. Exchange of water between the stream and the hyporheic zone creates habitat for aquatic organisms and serves as a control for stream biogeochemical, thermal, and flow processes. This study takes a multi-method field-based approach to...