The Lights Creek Stock is an 18 square kilometer copper-bearing granitoid
intrusion within the Plumas Copper Belt in the northern California Sierra Nevada. Engels
Mine, Superior Mine, and Moonlight Valley represent the main copper-mineralization in
the Lights Creek district and small prospects include the Ruby Mine, and Moonlight
Creek. The...
Full Text:
AN ABSTRACT OF THE THESIS OF
AbigailE. Stephens for the degree of Master of Science in Geology
The Lights Creek Stock is an 18 square kilometer copper-bearing granitoid
intrusion within the Plumas Copper Belt in the northern California Sierra Nevada. Engels
Mine, Superior Mine, and Moonlight Valley represent the main copper-mineralization in
the Lights Creek district and small prospects include the Ruby Mine, and Moonlight
Creek. The...
The Lights Creek Stock is an 18 square kilometer copper-bearing granitoid
intrusion within the Plumas Copper Belt in the northern California Sierra Nevada. Engels
Mine, Superior Mine, and Moonlight Valley represent the main copper-mineralization in
the Lights Creek district and small prospects include the Ruby Mine, and Moonlight
Creek. The...
The Lights Creek Stock is an 18 square kilometer copper-bearing granitoid
intrusion within the Plumas Copper Belt in the northern California Sierra Nevada. Engels
Mine, Superior Mine, and Moonlight Valley represent the main copper-mineralization in
the Lights Creek district and small prospects include the Ruby Mine, and Moonlight
Creek. The...
The Lights Creek Stock is an 18 square kilometer copper-bearing granitoid
intrusion within the Plumas Copper Belt in the northern California Sierra Nevada. Engels
Mine, Superior Mine, and Moonlight Valley represent the main copper-mineralization in
the Lights Creek district and small prospects include the Ruby Mine, and Moonlight
Creek. The...
Chlamydia trachomatis is an obligate intracellular bacterium that causes diseases of the eye and urogenital tract in humans. It is the cause of the sexual transmitted infection (STI) chlamydia, the most prevalent STI worldwide, and the ocular disease trachoma, the leading cause of infectious blindness. To date there is no...
Root rot diseases are a major constraint to bean (Phaseolus vulgaris L.)
production around the world. Both snap beans and dry beans are affected. Root rot diseases can be caused by a variety of pathogens; however, Fusarium solani is a common causal agent. Fusarium root rot is a primary yield...
Published June 1984. 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
Genetic sampling is used in many wildlife fields to gather data on populations or individuals. In noninvasive genetic sampling, animals do not need to be captured. DNA can be gathered from hair, scat, or other residue shed into the environment. However, this can result in degraded DNA, so it is...
Metamix is a mixture of botanical compounds that promote healing and prevent infection for burns and diabetic ulcers. In this thesis, metamix was incorporated into 1.75 weight percent gellan gum hydrogels as a drug delivery method for burned skin. The ideal concentration of metamix was 25% by solution volume for...
Survival of ecological systems pivot on critical moments. In the arid John Day Basin of Eastern Oregon, extensive restoration of the stream and floodplain focused on supporting salmon has been ongoing for the past 20 years, but recurring short periods of extreme temperature increase and low flows result in mortality...
Past studies have shown that students struggle with main concepts of potential energy, such as reading graphs, understanding that potential energy can be negative, and, most pertinent to this research project, connecting potential energy to force. I designed an activity to help introductory physics students address these struggles. The activity...
Tension relationships were determined in steel cable passed through a stump notch and anchored to another object. Tensions were measured in the cable coming into and leaving the notch with one full wrap on the stump. Data was collected from two sites with two test stumps (15.7 to 37.5 inches...
Stephen Biko was a black leader in South Africa who
died in police custody on September 12, 1977. Biko's death
echoed within the Republic of South Africa and around the
world, showing that racial tensions in that country were
severe. At his death he was a hero to the black...
The characterization of the seismic performance of structures relies on numerical simulations. However, estimates of seismic response are subject to various sources of uncertainty, including modeling uncertainty. This research estimated the response of two full-scale structural specimens composed of a moment resisting frame, elastic spines, and force-limiting connections (FLC), which...
Non-steroidal anti-inflammatory drugs (NSAIDs) are used to control pain and inflammation, but can have serious adverse effects, including gastrointestinal ulceration. Non-selective NSAIDs inhibit both cyclooxygenase isoforms: COX-1 and COX-2. COX-2 is primarily responsible for the inflammatory response, while COX-1 is constitutively expressed, representing the dominant source of prostaglandins for gastric...
Agriculture Resource Management Plans (ARMPs) are the primary programmatic-level planning document for the management of tribal rangelands in North America. This project compares a standard ARMP product with a prototype ARMP developed through a Structured Decision Making (SDM) approach for the Navajo Partitioned Lands. The SDM approach provided increased transparency...
The North Pacific humpback whale (Megaptera novaeangliae) population has been increasing at an average annual rate of ~6% since the early 1990s. In northern Southeast Alaska alone, there are now more whales than estimated for the entire North Pacific several decades ago. An understanding of how this growing population is...
For many species of marine turtle the characteristics that define pelagic habitat have yet to be fully identified. A better understanding of these habitat characteristics is critical to reduce high seas fisheries interactions with turtles, especially as the status of many turtle populations has placed them on the threatened or...
Background: Although both transgender adults and adults living with disabilities struggle to access healthcare, both populations are underserved and understudied. Existing research either examines transgender adults and adults with disabilities as separate groups or frames disability as a health outcome a transgender person may experience. Health care utilization and health...
The Canada goose (Branta canadensis) monogastric gut is proposed to contain aerobic spore-forming bacteria that produce non-toxin substances that may promote anti-inflammatory immune responses. It is hypothesized that the aerobic bacteria found in samples of Canada goose microflora could have probiotic effects in other avian species or used for commercial...
Sustainable elk (Cervus canadensis) habitat management on U.S. Forest Service (USFS) lands involves a complex relationship between management practices and ecological processes. A relatively novel Rocky Mountain elk population (Cervus canadensis nelsoni) on the Plumas National Forest (PNF) in northeastern California became established in the early 2000s, but there is...
Marine protected areas (MPAs) are an area-based tool used to manage and protect areas along the coasts and ocean that face impacts from development and climate change. Local communities both impact and are affected by the creation of MPAs and as such, it is important to include their knowledge and...
The Blackfoot Community Conservation Area (BCCA) was created in response to a degrading natural environment coupled with a weakening community. The BCCA is a community owned 5,609-acre forest located in the heart of the Blackfoot watershed in Western Montana. Fearful of development and the creation of subdivisions, landowners banded together,...
The neutron flux-energy spectral characterization of a Thermo Fisher MP320 deuterium-tritium neutron generator was performed for two shielding configurations, one with substantial moderator between the source and the sample and one without such moderator. The STAYSL PNNL spectral adjustment code was utilized in conjunction with MCNP modelled reference spectra and...
In the United States, falls are the leading cause of fractures and accidental death in the elderly; 70% of these fractures are women. Hispanic women account for a large population in the US, however data on falls and fractures for these women is lacking. The purpose of this systematic review...
Being human is often portrayed as desirable in fiction. Many fictional beings, particularly robots and androids, seek out being human as a goal. Although current robotics is not advanced enough for robots and androids to be deemed sentient, the world of fiction is quickly becoming reality. With the integration of...
Women and marginalized populations often encounter adversity associated with access, planning, and management of water and sanitation (WatSan) resources in rural India. The Government of India (GOI) has shifted to decentralized, participatory WatSan systems and developed policies to include women and marginalized populations from rural areas in WatSan. Many NGOs...
The COVID-19 pandemic became the deadliest epidemic since the Influenza pandemic in the early 1900s. (Centers for Disease Control and Prevention, 2023). Every government level across the United States had differing responses to COVID-19, and politicians have been the center of attention for their role in COVID policy support or...
Fungi have long been used for discovery of new chemical scaffolds. In the clinical setting, the fungal natural products penicillin, statins, and cyclosporine have revolutionized medicine to treat diseases and infections. In the environment, fungal natural products have been used as herbicides, fungicides, and insecticides to protect crops, livestock, and...
Little empirical research has been conducted on self-gifts
as a phenomenon of consumer behavior. A review of
literature demonstrated that the phenomenon of self-gifts has
been studied from the conceptual aspect, such as self-gift
functions. Yet, our knowledge of self-gifts still remains
limited because many of the determinants of self-gifts...
There are many existing bridges around the world that were designed without consideration for seismic effects. Many of these bridges were designed before modern earthquake engineering design standards and practices existed and thus are expected to perform poorly during strong ground shaking. Common structural deficiencies are found in their reinforced...
Tocopherols are plant secondary metabolites that are known collectively as
vitamin E. Tocopherol compounds act as potent antioxidants by quenching free
radicals and protecting fatty acids from oxidative damage. In humans (in vivo)
tocopherols protect membrane lipids from breaking down, while in oils (in vitro)
tocopherols protect fatty acids from...
Oligotrophic bacteria are adapted to low nutrient concentrations. As most of the ocean is oligotrophic (low in nutrients), oligotrophic bacteria thrive in the ocean and make up the majority of planktonic cells. Because of this, oligotrophs are crucial to oceanic nutrient cycles. However, marine oligotrophic bacteria are dwarfed by their...
Myxozoans are an enigmatic group of obligately parasitic, microscopic cnidarians. They diverged from their free-living relatives over 600 million years ago and have highly reduced genomes. However, they have retained nematocyst stinging cells which characterize the phylum Cnidaria. Free-living cnidarians utilize this cellular weaponry for defense and predation whereas the...
A system intended to detect, classify, and track radioactive sources in moving
vehicle traffic is under development at Lawrence Livermore National Laboratory
(LLNL). This system will fuse information from a network of sensor suites to provide
real time tracking of the location of vehicles emitting gamma and/or neutron radiation.
This...
The thermal regime of rivers plays a key role in aquatic ecosystem health. In the Willamette River, OR, the present day main channel temperature is often too warm for cold water fishes during the late spring, summer, and early fall. At these times, cold water fishes tend to be concentrated...
Climate change impacts everyone’s food and water security. Increasing global temperatures accelerate the hydrologic cycle and consequently impact the water resources for billions of people worldwide. Countless models have been developed to represent various components of the hydrologic cycle at various spatial and temporal scales. These are often validated against...
The cyclic resistance of predominantly fine-grained soils has received considerable attention following ground and foundation failures at sites underlain by silt-rich soils during recent earthquakes. In several cases substantial ground deformation and reduced bearing capacity of silt soils has been attributed to excess pore pressure generation during cyclic loading. These...
The purpose of this study was to develop a model to calculate
gamma ray pulse height distributions that closely approximate
measured ones. The model was used to produce a pulse height
distribution for a postaccident coolant sample from a nuclear
reactor. Lower limits of detection were calculated for certain key...
The stability analysis for a heated tube system is an
important safety feature of a nuclear power plant.
Although the system theory is well established for linear
systems described by ordinary differential equations, there
is still a shortage of theory dealing with a distributed
system, which is described by partial...
Of great benefit, but not limited to seafloor mineral
exploration, is a technique that fairly rapidly determines the
composition of a drilled vibracore (in a time comparable to the time
involved in obtaining the core). The rapid assessment is desired to
predict whether a given region warrants further exploration by...
An integrated sampling and gamma ray spectrometry system has
been developed for analysis of TRIGA reactor primary cooling water.
A microcomputer controls pumps and valves using BASIC and assembly
language programs to pump 300 ml liquid samples into a reference
geometry surrounding a Ge(Li) detector. Gamma ray spectra are
acquired...
This project report presents a laboratory investigation of the dynamic behavior of saturated alluvial silty soils from sites in Oregon and Washington. The focus of the study was to document the liquefaction susceptibility, post cyclic strength, and volumetric strain behavior of the silt soils based on cyclic, undrained triaxial compression...
A personal computer with a Data Acquisition and
Control Adapter interface has been used to monitor the
power of the Oregon State University TRIGA Reactor, and
from the time behavior of the reactor power the reactivity
has been computed using the point kinetics equations and
displayed on a digital read-out...
A self-powered neutron detector (SPND) is a device that, coupled with a current meter, provides a readout proportional to neutron population. This thesis discusses the design parameters of an array of such devices, their characteristics, and the use of these devices as a self-powered neutron spectrometer (SPNS) to provide information...
With the advent of more powerful, less expensive computing
resources, more and more attention is being given to Monte Carlo
techniques in design application. In many circles, stochastic
solutions are considered the next best thing to experimental data.
Statistical uncertainties in Monte Carlo calculations are typically
determined by the first...
The counting of delayed neutrons emitted by fission is presented
as a valuable technique for the measurement of uranium concentrations
in a variety of matrices. The concentrations successfully
analyzed can vary from well under one part per million to the high
concentrations found in uranium ores. In a sample analysis,...
The cell survival curve is the only means by which to both qualitatively and
quantitatively assess morphologic alterations directly resulting from in vitro irradiation of
the cell. A ⁶⁰Co cell survival curve experiment has successfully demonstrated the
response of the AtT-20 clone mammalian cell line to the effects of gamma...
The seismic performance of port structures has been well documented following
recent earthquakes, and indicates that port structures are highly susceptible to earthquake-induced
damages. These damages are primarily due to soil liquefaction and the associated
ground failures. Sheet pile bulkheads provide vital intermodal and lifeline transportation
links between water-side and...
This project implements the control of an AUTOMATIC GAMMA
WELL counting system with an AIM-65 microcomputer. All
states and control signals to and from the AIM-65 are
obtained via three VIAs (Versatile Interface Adaptors).
Motor controls were implemented using triacs, operational
amplifiers and TTL logic devices while the RTC (Real...
To distinguish americium-241 in human lungs from
translocated activity in the tracheobronchial lymph
nodes (TBLN), two intrinsic germanium detectors were
collimated with 0.3-cm lead sheeting.
A tissue-
equivalent phantom containing either 620 nCi (22.9 kBq)
in the lungs or a 2200 nCi (81.4 kBq) TBLN point source
was counted; as...
Re-occlusion of arteries following percutaneous transluminal coronary angioplasty (PTCA) remains a post-operative issue in the treatment of artery blockage. This re-narrowing of the luminal cavity, a condition called restenosis, has been attributed to the injury induced by PTCA balloon insertion. While arterial recoil can be completely prevented by a coronary...
The undermining of bridge foundations can lead to either costly repairs or a bridge
collapse. These foundations must be designed to counter the effects of scour. Current
practice does not allow for accurate estimates of scour in erodible rock. Scour in rock can be related to geotechnical and hydraulic properties....
Cost effective medical isotope production is key to the success of many forms
of radiation therapy. A lymphoma clinical trial for copper-67 was canceled in 1997
due to insufficient production quantities of the isotope (Fast Flux Test Facility, 2001).
To date high flux thermal reactors and particle accelerator facilities have...
The gamma contribution to reactor afterheat
depends on gamma energy since high-energy commas are
more likely to escape from tilt. fuel. The objective of
this work is to investigate the gamma-energy spectrum
of a pure U-235 fission reactor.
Fission-product nuclides are first listed in order'
of importance as contributors to...
Recent experience demonstrates that waterfront structures are vulnerable to
earthquake damage. The poor seismic performance of these facilities has been
primarily due to liquefaction of backfill and/or foundation soils and the lack of
seismic design standards for waterfront structures. The seismic performance of
waterfront structures is a key issue in...
This dissertation presents the results of a research effort conducted to better understand the seismic performance and analysis of pile-supported wharves. Given the limited number of well-documented field case histories, the seismic performance of pile-supported wharves has been poorly quantified, and the analysis methods commonly employed in engineering practice have...
Fifteen sand samples from beaches along the Pacific
North were analyzed for their elemental content by the
method of instrumental neutron activation analysis
(INAA). A separation technique was employed to separate
the zircon (a heavy non-magnetic mineral with a specific
gravity of 4.67) from the rest of the sample. This...
Currently the Food and Drug Administration publishes radiopharmaceutical information for physicians to choose appropriate medical diagnosis and therapy for their patients. The primary functions of these radiopharmaceuticals are diagnosis and delivering doses to a patient with appropriate energy, biological half life, chemical behavior, and radiological half life. These radiopharmaceuticals preferentially...
As the western United States continues to experience prolonged drought that is extending water deficits and threatening ecosystem resilience and socioeconomic systems, it will be vital to understand the relationship between water use and transport for proper water resource management. This is especially important to the agricultural areas of the...
Satellite Based evapotranspiration (ET) models have become a dominant means to estimate large-scale surface fluxes of water. Global and regional ET estimates are important parameters in many climate forecasts and hydrologic models. However, large scale partitioning of ET into soil evaporation, transpiration, and canopy interceptions remains largely unknown and modeled...
Vitamin E (VitE) is necessary for vertebrate embryonic development. VitE prevents lipid peroxidation (LPO), which requires detoxification by cellular antioxidant systems subsequently involving reducing power derived from energy metabolism. Thus, VitE protects metabolic networks in the developing embryo and the integrated gene expression networks compensating for and impaired by LPO-induced...
Complementary delta-doped AlGaAs/GaAs Heterojunction Field Effect Transistor
(CHFET) devices and circuits were fabricated using MBE and a 2μ non-planar gate
recess process. Several schemes were used in an attempt to improve the performance of
the p-channel HFETs. These included delta-doping, carbon-doping and dipole-doping.
Circuits and individual n- and p- channel...
This paper evaluates Oregon Statewide Planning Goal 5: Natural Resources and Goal 17
Coastal Shorelands, planning programs and makes recommendations for improvement to the
Oregon members of the Columbia River Estuary Study Task Force (CREST). CREST is a
Council of Governments formed in 1974 which includes the local counties, cities...
Accurate estimation of water stress in vineyards could prove vital for optimizing irrigation and grape quality in a changing climate. The ECOsystem Spaceborne Thermal Radiometer Experiment on the Space Station (ECOSTRESS) offers potential to remotely sense vineyard water stress but lacks validation against in-field measurements in vineyards. In this study,...
The effect of the conjugation with cyclopropyl rings
on the activation parameters for the formation of
carbenes from the corresponding diazo compounds was
investigated using diisopropylcarbene (46), cyclopropyl-isopropylcarbene
(47), and dicyclopropylcarbene (48).
Each of these three carbenes was generated by the
thermolysis of the parent benzenesulfonylhydrazone
potassium salts using DMSO...
Approximately one quarter of America's students
leave school prior to graduation. Teaching practices
need to be examined if schools are to effectively deal
with the student population. at highest risk of dropping
out. The purpose of this study was to investigate the
attending behaviors high school teachers directed to
students...
This thesis presents the design of a 10 bit Analog to
Digital Converter which consists of a 6 bit flash followed
by a 4 bit pipeline architecture. The total system is
described and the 4 bit pipeline is implemented on a bipolar
process.
The objective of this research is to...
The thesis is the first third of a novel entitled Steelhead. The story takes place in and around a small southern Oregon town in the summer of 1967. The narrator, eighteen-year-old hot-rodding Emil Reese, discovers hippies swimming naked in the river near his house. The hippies, newly arrived from San...
The presence of residual muscular tension has been implicated
as a detrimental influence on the performance and learning of motor
skills. A method for reducing muscular tension has been provided by
the recent advent of biofeedback training. Thirty young adult males
were subjected to tests of stabilometer balancing skill and...
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...
A radix 2n non-restoring division algorithm is described. The
algorithm is designed to be compatible with hardware multiprecision
multiplication methods currectly used in high speed digital computers.
This enables the use of the same hardware, with only changes in
control logic, to be used to implement both multiplication and
division....
The fungitoxicity of acetone extracts from the xylem of Fusarium
wilt disease resistant tomato plants (cv. Jefferson) inoculated with Fusarium
oxysporum f. sp. lycopersici was greatly influenced by environmental
factors. Extracts obtained from plants 1 h after watering were 4-times
more toxic than extracts from plants subjected to water stress...
Field studies were conducted in 1975 and 1976 to evaluate
sequential sampling plans for the redbacked cutworm, Euxoa
ochrogaster (Guenee), in Oregon peppermint. Sequential sampling
resulted in reliable decisions concerning whether or not cutworm
densities were high enough to justify treatment with insecticides.
The use of sequential sampling reduced the...
This study was an investigation to determine the distribution, abundance and general food habits of salmonids and non-game fishes residing in several selected coastal streams, Douglas and Coos Counties, Oregon. The physical conditions that characterize the various stream habitat types were monitored and the influence of physical conditions on the...
Forty-eight young adult males were ranked on the basis of mean
hand-grip strength scores and the middle one-third, the medium
strength range, were chosen as subjects. These sixteen subjects were
given 30 serial trials in each of four tests; knee flexion, knee
extension, elbow flexion, and elbow extension. Each trial...
The conceptual foundation of the study emerged from a concern
regarding the application of managerial competencies in the local
church. A review of the literature suggests that in spite of the
increasing awareness for the need to make greater use of these skills,
little consensus currently exists regarding their relative...
The purpose of this research was to determine the relationship
between attitudes and behaviors pertaining to male contraceptive practices;
the influences of living group affiliation in these practices;
the influence of partners in birth control method use; the quality of
communication in the sexual relationship as an influence in birth...
A pest management program for Tetranychus urticae Koch in Oregon
peppermint was developed based on studies of sampling, plant phenology,
population dynamics and damage thresholds.
A sample size of 45 leaves provided a confidence level of 90%
and a confidence interval of 50%. Estimation of the sample mean was
based...
The Federal Republic of Nigeria, on the west coast of the continent of Africa, is divided into four Regions: Northern, Western, Midwestern and Eastern. The Federal Capital of the country is Lagos. Eastern Nigeria occupies the south-eastern portion of the country, nearest to the Federal Republic of Cameroun.
The propensity...
A study was conducted at Yaquina Bay, Oregon, to determine
the age-fecundity relationships in the striped seaperch Embiotoca
lateralis. A questionnaire was sent to California, Oregon, and
Washington to ascertain what regulations were in effect, and the value
of the family Embiotocidae with regard to the sport and commercial
harvest....
A three component drag probe has been built, calibrated, and
used to measure velocities beneath deep water ocean waves and
turbulence in a tidal channel. Simple variable inductance devices
which may be submerged in water were used as displacement transducers
and the associated electronics provided voltage outputs which
were proportional...
A proposed modeling technique that yields a best fit to observed wide-angle reflection profiles incorporates (1) the use of migrated vertical reflection profiles to provide topographic control, (2) ray tracing to produce theoretical wide-angle reflection profiles for hypothetical crustal sections, and (3) the iterative adjustment of crustal layer dip, thickness...
Ocean deoxygenation is predicted to increase in severity over the next few decades, posing a threat to marine life and fishing economies. Improved predictions of ocean deoxygenation depend on a better understanding of the biogeochemical mechanisms that underly this process. Within the realm of biogeochemical mechanisms, this project specifically investigated...