The Columbia River Gillnetter is the pilot of the Lower Columbia River commercial fishing industry, keeping fishermen and the public in touch with today's important issues.
The Columbia River Gillnetter is the pilot of the Lower Columbia River commercial fishing industry, keeping fishermen and the public in touch with today's important issues.
During Leg 168 of the Ocean Drilling Program, basalts were recovered by drilling and subsurface water was collected with a water sampling tool at Hole 1026B on the east flank of Juan de Fuca Ridge. Microorganisms were found in both types of samples. The microorganisms in the basalt appear to...
PURPOSE: To determine physical, plankton and nutrient/chemical conditions over the continental margin for climate change studies in NE Pacific. In particular, to make CTD and CTD/rosette and net tow stations along 5 lines (off Newport, Heceta Head, Coos Bay, the Rogue River and Crescent City, OR, to deploy drifters at...
This report was derived from field data collected by personnel of the US Forest Service (USFS) and Oregon Natural Heritage Program (ONHP). The area examined encompasses four National Forests (Gifford Pinchot, Willamette, Mt. Hood, and Siuslaw) and two Bureau of Land Management Districts (Salem and Eugene). It does not include...
A set of 119 study trees was identified in a 65 year-old Douglas-fir stand after a thinning operation conducted seven years ago using pre-planned skid trails and groundbased machinery. Some of the trails were tilled using a winged subsoiler after this operation in order to alleviate the effect of compaction...
The current production plan at the Potlatch Hybrid Poplar plantation in eastern Oregon is to haul 8,000 whole trees per day (170,000 bone dry Tons of chips annually) to a centrally located processing facility (CPF) where the poplar will be processed. Harvests begin in 2001 and continue on a seven-year...
Concerns about the extent to which major Pacific Northwest floods over the last decade might have been exacerbated by logging have heightened the need for a better scientific understanding of the role of forest maturity on snow accumulation and melt. To address this need, a multi-scale field and modeling study...
This paper describes the application of aerial photography and GIS technology to develop flexible and transferable methods for multi-spatial scale characterization and analysis of riparian corridors. Relationships between structural attributes of riparian corridors and indicators of stream ecological conditions are not well established. As part of a research project focused...
This report summarizes accomplishments of the McKenzie River Focus Watershed Council (MWC) in the areas of coordination and administration during Fiscal Year 2000. Coordination and administration consist of prioritization and planning for projects; project management and implementation; procurement of funding for long-term support of the Council; and watershed education/outreach program...
This is an exhibit made by the Oregon Department of Fish and Wildlife to the Oregon Fish and Wildlife Commission for the November 17, 2000 meeting. Topics covered include: proposals to add Daphnia (Daphnia spp., a small crustacean in the Klamath Lake area) and flat abalone (Haliotis walallensis) to the...
NM-9D11A-AN3 alfalfa (Medicago sativa L.) germplasm
(Reg. no. GP-337, NSL 386506) was developed by the New
Mexico Agricultural Experiment Station and released 5 Oct.
1998. NM-9D11A-AN3 has demonstrated high yield potential
under deficit irrigated field conditions in southern New Mexico.
It is highly resistant to anthracnose (caused by Colletotrichum trifolii...
"Several species of rockfish inhabit the nearshore ocean off Oregon and contribute significantly to the recreational fishery with black rockfish (Sebastes melanops) being most important. Nearshore rockfish populations are coming under increased fishing pressure with relatively little assessment due to the difficulty and expense of such an undertaking. The need...
E. coli thioredoxin (TRX) was modified by the episulfonium ion derived from S-(2-chloroethyl)glutathione (CEG) or S-(2-chloroethyl)cysteine (CEC). The alkylation site was located at Cys-32, which was confirmed by tandem mass spectrometry. Two forms of native TRX, Oxi- and Red-TRX, and two modified TRXs, GS- and Cys-TRX, were examined by hydrogen/deuterium...
In 1995 my students and I developed Leda, a multiparadigm language based on the Pascal model. Leda allowed programmers to create abstractions in an object-oriented, functional, or logic programming style. More recently we have been interested in recreating this work, but this time using Java as the language basis. The...
The era of "customer satisfaction" brings students to colleges who are increasingly identifying themselves as customers. Competition among a growing number of institutions and learning organizations is sharpening the desire of institutions to deliver high quality service in order to attract and retain students. Some examples of interactions where service...
Five student-researchers and the author engaged in
a continually-evolving, student-driven qualitative
research study. Despite significant disadvantages,
including navigating a. foreign culture without speaking
the language, these invulnerable learners succeeded.
Ultimately of greatest interest to the six were an
analysis of their collective knowledge and experiences,
and their individual transformation over...
The purpose of this study was to determine the level of awareness and use of
selected universal design features and products in single-family housing by Oregon
housing contractors. Also researched were barriers and incentives to use as well as
the position and opinions of these housing contractors on the viability...
Passive capillary samplers (PCAPS), which sample water from the vadose zone via a hanging water column in a fiberglass wick, have shown potential to provide superior estimates of soil water flux compared to alternative methods. The objectives of this study were to evaluate the performance of PCAPS under natural rain-fed...
Artificial capillary barriers are being used to divert water away from sensitive underground regions. Conversely, funneled flow over natural capillary barriers may increase the danger of groundwater contamination by decreasing the travel time and contact area. There have been relatively few experimental studies of capillary barrier flow patterns. In this...
The Mount Fubilan Intrusion is part of a geologically young hypabyssal stock in the Star Mountains of Papua New Guinea. This stock was mapped as the Ok Tedi Intrusive Complex and divided into four separate bodies: the Mount Fubilan, Sydney Intrusion, Kalgoorlie, and Ningi Intrusions. Hydrothermal fluids caused alteration of...
A pilot scale demonstration of a biological permeable barrier was conducted in a pentachlorophenol-contaminated aquifer at a wood preserving facility. A permeable reactor was constructed to fit within a
large diameter well. Arranged in series, a cylindrical reactor 24" x 36" (0.61 x 0.91m) (diameter x height)
was partitioned to...
We used recent phenomenological form factors to calculate the effect of on-shell
two-pion exchange in nucleon-nucleon scattering below the two-pion production
threshold. As expected, the contributions of partial wave amplitudes are all negligible.
We also noticed that the relativistic spin-operator decomposition of the
scattering amplitude is not unique at certain...
Purpose: The Purpose of this research was to design, implement and evaluate a patient centered asthma intervention pilot program directed by physicians and administered by community pharmacists to a group of Managed Care contracted Oregon Health Plan asthmatics. The evaluation was to determine if the proposed intervention could improve the...
This study described how and why a Korean elementary teacher taught mathematics as he did. Specifically, the study sought to describe his beliefs about the teaching and learning of mathematics and relate them to patterns of classroom interaction and norms.
An ethnographic inquiry guided the study of one third grade...
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...
Changes in the federal farm program, in rainfall pattern and quantity, and
increased incidence of herbicide resistant weeds and diseases have generated
increased interest in spring grains in the Pacific Northwest. However, spring grains
have traditionally been treated as minor crops in this region, thus little research has
been done...
Reported here is an investigation to determine if azinphos-methyl (AZM), an
organophosphate insecticide, adducts to hemoglobin, and if so, whether the
hemoglobin adduct could be used as a quantitative marker of occupational AZM
exposure. We hypothesized that AZM, or a metabolite of AZM, binds to hemoglobin
in erythrocytes forming an...
This thesis contains two essays that use state-of-the-art econometric methods to estimate the implicit prices of various housing and vehicle attributes in hedonic price analysis. The additive nonparametric regression proposed by Hastie and Tibshirani (1990) is applied to capture a series of nonlinearities relating prices to their attributes that cannot...
The electron, gamma and neutron radiation degradation of III-V semiconductors
and heterojunction bipolar transistors (HBTs) is investigated in this thesis.
Particular attention is paid to InP and InGaAs materials and InP/InGaAs
abrupt single HBTs (SHBTs). Complete process sequences for fabrication of
InP/InGaAs HBTs are developed and subsequently employed to produce...
Inferences regarding the biology of extinct taxa are often founded primarily
on cladistically-based phylogenetic hypotheses. However, these inferences are
frequently inconsistent with the morphology and physiology of modern animals. I
suggest that reference to the biology of modern animals might be a more
appropriate tool to aid in the reconstruction...
Acetaminophen has been safely used for analgesia for many years.
Literature suggests that a plasma acetaminophen level of 5μg/ml is necessary to
maintain analgesic relief in humans. Current dosing regiments are inconvenient (every
4-6 hours) and do not maintain this minimum plasma level. Simulations were
conducted to examine various doses...
The addition of exogenously supplied hydrogen stimulates PCP reductive
dechlorination and increases bacterial growth. While research focuses mainly on
pure cultures, few exist capable of aryl reductive dechlorination, and few markers
exist to identify reductively dechlorinating bacteria within mixed cultures.
Furthermore, most active bioremediation projects stimulate mixed cultures of native...
Herein, a program of research is detailed related to transport through the Si metal oxide semiconductor (MOS) quantum dots fabricated in a process flow compatible with modern ULSI (ultra large scale integrated circuit). Silicon quantum dots were fabricated by placing split gates within a MOSFET structure. Quantum dots of several...
Biomass burning associated with deforestation and land use in the Amazon, greatly contributes to emissions as well as depletion of elemental pools. We identified deforestation and pasture formation and quantified resultant burning emissions and terrestrial aboveground elemental pool losses during a period of early colonization in the vicinity of Jamari,...
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...
Isolated injury of the anterior cruciate ligament (ACL) is less frequent and typically perceived as less severe than ACL injuries with concurrent damage to other knee stabilizing structures. The timing of the ACL reconstructive surgery is thought to be a
critical factor that affects the patient's postoperative outcome. No previous...
Environmental monitoring poses two challenges to statistical analysis: complex data and complex survey designs. Monitoring for system health involves measuring physical, chemical, and biological properties that have complex relations. Exploring these relations is an integral part of understanding how systems are changing under stress. How does one explore high dimensional...
The 1989 Exxon Valdez oil spill was a major perturbation of nearshore habitats of Prince William Sound, a wintering area for harlequin ducks (Histrionicus histrionicus). This research was designed to evaluate harlequin duck population recovery from the oil spill from 1995 to 1998, using a demographic approach to assess both...
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 addresses two topics on market imperfections. First, chapter
2 presents a theoretical model that focuses on problems associated with informational
asymmetry. The model presents a dynamic signaling game between a monopolist
manufacturer and a monopolist retailer, where demand is uncertain and only the
retailer is privately informed. This...
Previous research has shown a gap between chemistry students' conceptual
and computational understandings of chemistry topics such as gas laws,
equilibrium, and reactions. This qualitative study examined the conceptual and
computational understandings of stoichiometry of college students enrolled in a
large lecture Introductory Chemistry course. Factors that might influence students'...
DNA four-way junctions (also known as Holliday junctions) are the primary structural intermediate during recombination, an important process responsible for biological evolution and maintenance of genomes. These junctions arise from the assembly of four nucleic acid strands to produce double-helical regions extending from a central point. Although much progress has...
Preservice teachers' beliefs and values develop due to their long "apprenticeship of observation" (Lortie, 1975) and often filter their teacher education experiences (Feiman-Nemser & Buchman, 1986; Pajares, 1992). Case methods may be one curricular tool by which to instill change in preservice teachers' beliefs and values. This study investigated the...
The effects of oligoribonucleotides of identical or similar sequences to a
ribosomal protein binding site, specifically S8, on prokaryotic 30S ribosomal assembly
were investigated in Escherichia coli. The oligoribonucleotides were expected to bind to
the target protein S8 and block its incorporation into the 30S subunit, resulting in a nonfunctional...
This study describes the historical development of the Associate Degree Nursing Program at Portland Community College by women faculty leaders in a male-dominated organization. In-depth interviews of eleven participants were transcribed and analyzed. The participants gave a very rich description of this nursing programthus describing its culture. Six themes were...
A Cost-Effectiveness Analysis of a targeted intervention for community control of Ascariasis was carried out in three rural communities near Quito, Ecuador. Targeted treatment with Paico (Chenopodium ambrosioides) and Albendazole (ABZ) was applied to children aged 5 to 15 years attending primary local schools in Aglla, Checa and Iguinaro. Prevalence...
The Quotient Method (QM) is used by the United States Environmental Protection Agency (USEPA) in ecological risk assessments of pesticides for nontarget organisms. The QM requires several assumptions regarding exposure and hazards of pesticides to wildlife; several of these assumptions have not been tested. During 1997-99, I conducted three experiments...
The marine cyanobacterium Lyngbya majuscula has proven to be extraordinarily rich in bioactive secondary metabolites. This dissertation describes the chemistry of L. majuscula collected from Grenada, Fiji and Papua New Guinea, and the biosyntheses of two L. majuscula metabolites, curacin A and barbamide.
The chemical studies with a Grenada collection...
This dissertation describes the epiphyte communities on tall shrubs in forests of
western Oregon, with a focus on potential effects of management practices on these
communities. Shrubs and other hardwoods have recently gained recognition as
hotspots of diversity for epiphytes in young conifer forests of the region. Yet little is...
The aim of the first manuscript was to examine CHD risk in women with MS by
assessing the frequency of physical inactivity and the frequency of anthropometric,
dietary, and metabolic CHD risk factors. Although participation in physical activity is
often avoided by many women with MS, some women remain physically...
Low bone mineral density (BMD) and poor stability both contribute to
increased risk of fractures associated with a fall. The aim of this dissertation was
two-fold. The first study, a cross-sectional analysis, sought to determine the
anthropometric and/or performance variables that best predicted BMD and postural
stability in mature, premenopausal...
The purpose of this study was to analyze the individual reasoning of
24 adults as they made decisions for two communities regarding municipal
wastewater treatment. The two western Oregon communities were both
responding to notices from governmental agencies of higher environmental
standards for the purification of wastewater before it could...
The giant hairy desert scorpion, Hadrurus arizonensis, is a long-lived species
of North American scorpion that is presented here as an important model for research
in mating systems evolution and sexual selection. Many behaviors found in this
species were undocumented and are described here for the first time. This thesis...
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...
Evidence exists that links a sedentary lifestyle with the emergence of chronic
diseases during adulthood. Reports indicate that many children and adolescents already
have risk factors for chronic diseases and the prevalence of obesity among children is at
an all time high. There are concerns that children may not be...
The adoption and increasing uses of the Internet in higher education
in many parts of the world have resulted in fundamental changes in
academic cultures. The transfer of information is essential to academic
life, and the Internet offers faster and easier access to information and
communication between people than ever...
Indole-3-carbinol (I3C), the most abundant metabolite of glucobrassicins, is
found in cruciferous vegetables such as broccoli, Brussels sprouts, cabbage and
cauliflower. I3C has been shown to have anticarcinogenic activity against many
chemical carcinogens in multiple target organs in animal models. However, the
anticarcinogenic activity of I3C is considered indirect since...
Two types of temporary poois, known as playas, occur in semiarid southeast Oregon. Vegetated upland playas are found in the High Lava Plain province; barren alkaline-saline playas are found in the Basin and Range province. Both types become ponded in most years, but they often lack redoximorphic features indicative of...
In recent years, the elliptic curve cryptosystems (ECC) have received attention
due to their increased security with smaller key size which brings the advantage of less
storage area and less bandwidth. Elliptic curve cryptography provides a methodology
for obtaining high-speed, efficient, and scalable implementations of network security
protocols. In addition...
The treatment of certain types of cancers brings with it serious physiological and
psychological side effects in cancer survivors, including: decreased aerobic capacity,
muscle wasting, body composition changes, fatigue, and a diminished overall quality of
life. Exercise may directly influence the physiological side effects of cancer and cancer
treatment, and...
¹¹¹In/Cd perturbed angular correlation (PAC) gamma spectroscopy was used to
study the point defect thermodynamics of tetragonal zirconia (t-zirconia).
PAC can be used to measure, among other things, oxygen vacancy defect
concentrations in t-zirconia. Higher than expected concentrations of oxygen vacancies in
undoped samples were found using PAC. It was...
The present study examined the process by which couples, in the context
of a heterosexual romantic relationship, participate in sexual activity. As they did
so, their interactions helped to construct their relationship. Social construction
theory and the gender perspective provided the theoretical foundation for this
qualitative research.
Nine heterosexual couples...
The acute phase response (APR) includes an early response of the innate immune
system to an inflammatory agent. Acute phase proteins (APP) are produced at
increased rates in the liver during this response. The APR has been well
characterized in mammals, but it is unclear to what degree teleosts mount...
With increasing operating frequencies in CMOS RF/microwave integrated circuits,
the performance of on-chip interconnects is becoming significantly affected by the lossy
substrate. It is the purpose of the first part of this thesis to develop a rigorous field
theoretic analysis approach for efficient characterization of single and multiple coupled
interconnects...
Community colleges are in a strategic position to meet the growing demands for educating a population that is in a dynamic state of change, a population that is becoming more diverse with each passing year. A diverse population and other critical issues have created a new challenge for community colleges....
Contaminant transport in ground water is an important environmental process that
affects a host of natural systems. Transport of contaminants is affected by many
processes, including aqueous complexation, adsorption, and redox reactions. One of the
most important components of an aquifer that controls transport is iron-oxide. In this
study, the...
This research was initiated to investigate a high
mortality problem occurring in market age broiler
chickens in Oregon. Initial field investigations
revealed that mortality was due to the systemic bacterial
infections. The subsequent laboratory experiments
suggested that suppressed short-term, non-specific innate
immunity rather than pathogenic properties of bacteria
caused the...