This study evaluated the effects of a crawler tractor, a rubber-tired skidder, and a torsion suspension vehicle on several soil and hydrologic properties in the western Sierra Nevada Mountains of California. Four sites, with soil textural classes ranging from a loam to a loamy sand and elevations between 680 and...
The natural fall of trees in riparian areas is an important source of coarse woody debris for mountain streams, improving fish habitat and influencing stream morphology. Existing models consider the probability of coarse woody debris entering a stream channel based upon trees having a random direction of fall without consideration...
Critical skyline and mainline tensions were identified as the conditions necessary for successful carriage passage uphill over an
intermediate support jack. These critical tensions were measured during field tests and compared with predicted values from weightless line, rigid link, and catenary analyses. All three analyses predicted
critical skyline tensions within...
Two hilislope sites in the central Oregon Coast Range were instrumented and monitored for winter precipitation and saturated and unsaturated subsurface conditions. The study sites were near-ridge depressions typically known as headwalls. Based on results of the monitoring, two existing mathematical models
were adapted to predict piezometric levels in headwalls...
The fabrication of nano-scale devices is a challenging, but potentially important, technology that has drawn a great deal of interest among researchers. Such nanoscale constructions utilizing a bottom-up approach for device building have many foreseeable applications in areas as diverse as miniaturized electronics, sensors, and biomedical devices.
One of the...
This research examines two of parameters of vectorial capacity for mosquitoes associated with catch basins in Corvallis, Oregon. The parameters of interest were determining 1) abundance of the mosquito species associated with the catch basins and 2) feeding patterns of local mosquito species. Three species of mosquitoes were collected from...
The Upper Grande Ronde River Watershed in northeastern Oregon is considered important habitat for threatened stocks of chinook
salmon (Oncorhynchus tshawytscha). Documented reductions in channel complexity and riparian vegetation within the watershed have increased concern over loss of viable habitat. An important component of salmonid habitat is stream temperature during...
A land management scheduling model is developed that uses a Tabu search procedure to schedule timber harvests and road management activities, while simultaneously meeting (over time and space) two aquatic goals, and also providing for an even-flow of timber harvest volume. Decision variables include land units and roads, and they...
Previous research has indicated that considerable amounts of finely divided slash accumulate in small mountain streams following timber harvesting. The subsequent biological decomposition of this organic matter can result i.n the reduction of dissolved oxygen (DO) concentration to levels as low as 0.6 ppm. These DO levels are lethal
to...
A model (called MERLIN) is presented that can allow the resource manager to consider the combined effects of silvicultural treatments and their effect on expected logging production and costs. This integrated analysis takes place within the framework of personal computer software readily available to most managers. This integration is accomplished...
Evaporation was studied along the Middle Fork of the John Day River in northeastern Oregon. Evaporation pans and various meteorological sensors recorded data at nine sites during the summer of 1998; measurements were made at each site over a 3-4 day period. A Dalton-type evaporation model was produced using water...
Historically, between 40-60% of the Coast Range of Oregon was comprised of
structurally diverse, old forests initiated by disturbances of various spatial scales
ranging from thousands of acres (large fires) to the size of a single tree (windthrow).
The predominant regeneration method of the past several decades, however, has been...
Recently, in an attempt to produce robust production frontier estimators, Aragon et al. [2005, Nonparametric frontier estimation: a conditional quantile-based approach. Econometric Theory 21, 358-389] and Martins-Filho and Yao [2008, A smooth nonparametric conditional quantile frontier estimator. Journal of Econometrics 143, 317-333] considered the estimation of nonparametric α- frontier models...
This dissertation consists of two essays that address code-sharing alliances in the U.S. domestic airline industry.
The first essay examines the economic impact of code-sharing using data from the complementary code-sharing agreement between Southwest and ATA Airlines. This code-share agreement is found to decrease air fares and increase passenger volumes...
The Middle and Upper Devonian Guilmette Formation was deposited within the inner shelf region of the Cordilleran miogeosyncline. Twelve distinct lithofacies are recognized in the Guilmette Formation
and represent deposition from various peritidal environments including quiet-water lagoons, organic buildups, a barrier bar/beach complex, and intertidal through supratidal flats. The relative...
Sediment transport in a gravel-bottomed stream located in the Oregon Coast Range was studied to determine the effects of a single
layer of large particles (the armour layer) located at the surface of the bed material. The bed load transport system was studied jointly with suspended sediment transport to understand...
This thesis examines the scholarship in pedagogical theory and practice of David Bartholomae over the past thirty-five years, in particular examining the role that the rhetorical construct of imitation has played in its development. Through my research, I trace the evolution of Bartholomae’s pedagogical stances and practices, as these both...
Rates of defecation of black-tailed deer in the Tillamook Burn of western Oregon were estimated using counts of groups of fecal
pellets in 1959 and 1960. A 340-acre enclosure was divided into eight range types on the basis of depth of soil, aspect, and elevation. The estimated rates of defecation...
The purpose of this study was to discern unpredicted, non-linear patterns that may emerge in complex instructional systems design projects. A secondary purpose was to determine how existing models could be redesigned to accommodate emerging factors. The following questions focused the inquiry:
1. In what ways does the actual ISD...
Fort Hoskins, located in Kings Valley, Oregon, was established in 1856 as one of
three forts to monitor the newly created Coastal Indian Reservation. Companies U and F
of the 4th Infantry were assigned to Fort Hoskins until 1861 when they were transferred
to the East with the outbreak of...
History, topography, and nature of people have influenced the development of electric power in Greece quite substantially. The power production per capita in Greece is very low as a result mainly of continual wars and an uneven distribution of population. In 1948, electricity was being supplied in the country only...
Western juniper (Juniperus occidentalis Hook) is a species of juniper native to arid regions of the Pacific Northwest. The western juniper tree has a number of competitive strategies that, in conjunction with an almost complete removal of fire from the ecosystem, have resulted in a significant expansion of its population...
To assess the effect of summer moisture stress on the capacity of tansy ragwort (Senecio jacobaea L.) to compensate for defoliation by the cinnabar moth (Tyria jacobaeae LT7), the performance of plants grown under different irrigation regimes was measured. The proportion of plants producing
new leaves following defoliation, the number...
Increasing water demand for growing municipalities, for water-based recreation
and for fishery and wildlife habitat has intensified pressure on the existing resource. Reallocation of water from existing uses to other, higher-valued uses is receiving greater attention due to constraints on development of new water supplies. A key to reallocation is...
This study traces the beginning of Oregon's State Park system from the conservation and progressive movements through 1929. It examines the roles played by the Oregon Highway Commission and Robert W. Sawyer in making the state's highways and beaches central to park planning. A profile of Samuel H. Boardman, the...
Three skyline carriage types are analyzed on the basis of their operating characteristics and limitations. Their effect on productivity
is expressed as cubic feet per hour yarded to the landing. These carriage types, tested as part of Oregon State University's School of Forestry Smallwood Harvesting Research Program represent those which...
An 18-year record of nitrate (NO₃), orthophosphate, total nitrogen and total phosphorus in four streams of the Bull Run
watershed, Oregon, was examined to determine its precision and time resolution. Of these four species, only NO₃ was found to be known to a sufficient level of detail for modeling and...
The purpose of this study was to examine the evidence of construct validity for self-report with assistance from a secondary source as a measure of physical activity (PA) in adults with intellectual disabilities (ID) in free-living environments. Thirty-seven participants (21 females, 16 males) with mild to moderate ID aged 19-74...
A program was developed on a desktop computer to determine the cable tensions and position of a balloon tethered by two or more guylines. The program was specifically applied to the analysis of the static load lifting capability of the Pendulum Swing Balloon System. This system uses a tethered balloon...
Since bulk p-CuO/n-ZnO heterocontacts were first proposed for gas detection, rapid development has taken place in improving the overall functionality of these structures. While bulk heterocontacts have been shown to exhibit desirable sensitivity and selectivity characteristics, these devices suffer from innate diffusion and ZnO/CuO connectivity drawbacks that limit their effective...
Management practices following forest harvest can affect long-term soil productivity through alteration of soil carbon (C) and nitrogen (N) pools, but processes contributing to change are poorly understood. I assessed effects of three levels of logging-debris retention in combination with initial or annual applications of competing vegetation control (CVC) following...
Myxozoa have been found worldwide; these parasites infect a wide variety of hosts, but have been found most often in fish. Carassius auratus (goldfish), a popular aquarium fish and a widespread invasive species, have been identified as an intermediate host for several myxozoan species. Some myxozoan parasites are pathogenic and...
In contemporary art, some artists enter into working relationships with other
groups or institutions to create a final piece. For example, an artist may be invited by a
museum to take part in an exhibition, or an artist may work with a city council to create a
public artwork. However,...
Marine reserves are known to directly replenish overfished species. However, the
community-wide effects of reserves are less clear. I examined the community of coralreef
fishes in a large, fully protected marine reserve in The Bahamas: the Exuma Cays
Land and Sea Park. Visual-transect surveys provided estimates and comparisons of the...
Variability in the depth and duration of anesthesia in individuals within a species is
frequently observed, yet few studies have investigated its causes in reptiles. To evaluate
the potential causes of variability in reptile anesthesia, I conducted experiments to test for
effects of body temperature, body composition and time post-feeding...
The rapid development of computing technologies in recent decades has allowed for data to be generated at unprecedented rates. As a result, users are challenged with the task of finding the precise information that they are looking for. Visualization techniques provide the ability to view and analyze data in different...
Oregon has a growing artisan cheese industry and is developing a reputation as one of the country’s leading regions for many varieties of cheeses. This thesis is an exploration of four of Oregon’s premier artisan creameries. The primary research for this project included visiting the farms and cheesemakers, tasting the...
A primary target of Mycobacterium tuberculosis is the human alveolar macrophage.
Infection by this bacterium can lead to a variety of responses, such as apoptosis,
autophagy, and necrosis, which may be involved in controlling the infection. M.
tuberculosis has evolved mechanisms to evade or use the host-mediated processes to its...
Soil organic matter (SOM) is the result of the balance between decomposition and incorporation of detritus from both above and below ground sources into the soil. It composes only a fraction of the soil by mass but it is one of the most critical components. The Detritus Input and Removal...
Background: Heart morphogenesis involves chamber formation followed by septation. Septation is the remodeling of the heart from a single channel peristaltic pump to a two channel pump with one-way valves. Several transcription factors have been implicated in the development of congenital cardiac defects. The paired-like homeodomain transcription factor Pitx2 has...
The spreadsheet has become a common technology tool and is now a predominant form of end-user programming. Some of the same features that make spreadsheets excellent tools for ad-hoc development can introduce errors into the final product. Although a variety of research has been performed investigating methods to detect errors...
Collaboration between scientists and decision makers is a critical element in mobilizing science into action. Likewise, the United Nations defines collaboration between scientists and policymakers as a requisite component in the process of sustainable development. Despite the UN sustainability movement beginning in 1983, scientists may still be frustrated by their...
miRNA-guided cleavage initiates entry of primary transcripts into the trans-acting siRNA (tasiRNA) biogenesis pathway involving RNA-DEPENDENT RNA POLYMERASE6 (RDR6), DICER-LIKE 4 (DCL4), and SUPPRESSOR OF GENE SILENCING3 (SGS3). Arabidopsis thaliana TAS1 and TAS2 families yield tasiRNA that form through miR173- guided initiation cleavage on the 5’ side of the siRNA-generating...
Proteins are the metabolic machines of the cell and as such, the study of proteins could illuminate the dominant biological activities that are occurring within cells and reveal how an organism interacts with its environment. Here, we used proteomic techniques to study the abundant marine bacterium SAR11 both as an...
Since its discovery, the anomalous dielectric behavior of CaCu₃Ti₄O₁₂ (CCTO)
has drawn a great deal of attention for many possible applications in electronic
devices. The origin of the giant dielectric constant in CCTO was explained via an
internal barrier layer capacitor model, and it has been reported that the dielectric...
A new group of lead free piezoelectric perovskite solid solutions, (1-x)Bi(B'B")O₃-xABO₃, were obtained via solid-state processing techniques. The solubility of unstable perovskite Bi(B'B")O₃ compounds into stable perovskite compounds was found to be related to the tolerance factor of the ABO₃ perovskite endmembers. The morphotropic phase boundary (MBP) in perovskite solid...
For a certain class of Z²-actions, we provide a proof of a conjecture that the ratio of the Perron eigenvalues of the transfer matrices of the free boundary restrictions converge to the entropy of that action. Also, a novel method for computing the entropy of Z²-actions is conjectured.
Oakland is a quiet, peaceful little town on the Calapooya Creek surrounded by rolling hills and little valleys. This little booklet is written with the intention of preserving the history of our pioneers and contains a number of the names of the people who took doriation Land Claims and is...
Literary fairy tales facilitate a specific inquiry into heroine quests. Due to the flexibility of the fairy tale genre, a variety of heroine tales have been produced. The specific stages of a heroine quest must be described in order to understand the direction and goals of these quests. In order...
Intellectual property rights is an incredibly important and salient issue today in both China and the rest of the world. This topic of intellectual property rights, or IPRs, has been an increasingly frictional and hostile issue of contention between
China and the rest of the world for many years. IPR...
In this thesis I examine the biocultural affects of nutrition and pregnancy on dental health throughout Ecuador. Factors such as diet, fertility rates, cultural practices and barriers to health care are investigated through a review of the existing literature. Three main regions of Ecuador were selected for examination -- the...
Over one third of the earth’s land surface has been modified to some extent for agricultural purposes. The large global footprint of agriculture, combined with the knowledge that existing reserve networks are likely insufficient for long-term conservation of native biodiversity, has necessitated that agricultural systems contribute to conservation of native...
The goal of this study was to advance methods for assessment of forest road hydrologic
response and sediment yield at a catchment scale. This research looked at the effect of
soil depth estimation on the Distributive Hydrology Soil Vegetation Model (DHSVM),
assessed the uncertainty and accuracy of hydrologic modeling of...
Fluorescent dye was used to assess summer low flow
hydraulic retention and transient storage (dead zone)
associated with fish habitat structures at Camp Creek,
Drift Creek, and the East Fork of Lobster Creek within the
central Coast Range of Oregon. Utilizing channel units to
stratify stream reaches, the effect of...
A landslide inventory, statistical analyses and a Geographic Information System (GIS) are used to analyze landslide sites and potentially unstable terrain in the Oregon Coast Range. The objectives are to evaluate the efficacy of locating landslide sites with topographic variables and discriminate the difference between sites where landslides have and...
The first project of this thesis is an in vitro study. This study was performed with 8 hydrocortisone topical products on the market for the purpose of comparing one Tec Lab product, a Corticool gel, to the other seven common products on the market. The permeation of these products was...
The systems currently available for forest road design are not capable of making computer-aided design judgments such as: 1) automated generation of alternative grade lines, 2) optimizing vertical alignment, 3) minimizing total cost of construction, maintenance, and transportation costs, and 4) aiming for least environmental impacts. In recent years, advances...
There has been increased concern about radiation dose to the female breasts, with approximately 200,000 new breast cancers being diagnosed each year in the United States. The unprecedented increase in the use of radiologic exams on younger women has also raised some additional concerns about how procedures are performed. The...
The Nevada Test Site (NTS) was the location for at least 100 above ground
Nuclear Weapons tests during the 1950's and early 1960's. Radioactive fallout
from these tests spread to many areas north and west of the NTS. According to
estimates from the NCI and DOE, Washington County, Utah was...
Heparin was modified and immobilized to surface-activated silica surfaces using two different reaction schemes. End-aminated heparin was reacted with 2-iminothiolane to produce free thiol groups at the terminal ends of the heparin chains. The end-thiolated heparin was immobilized by reaction with a pyridyl disulfide activated poly[ethylene oxide]-poly[propylene oxide]-poly[ethylene oxide] triblock...
Small low-head diversion dams are capable of removing much of the flow of a river, often resulting in increased water temperatures and habitat loss. Warmer temperatures have been shown to accelerate aquatic invertebrate growth and development, and discharge reductions can reduce instream habitat, suggesting that water withdrawals may alter both...
The purpose of this study was to document a community college faculty development process through which the faculty learned to reconstruct their curriculum around significant learning outcomes and authentic assessment strategies. The following questions focused the inquiry: 1. What kind of organizational support systems were necessary for the faculty to...
The mechanisms of pool maintenance were investigated in a small (width = 10 m,
drainage area = 18 km2), gravel-bed stream where pools are commonly associated with
large, in-channel obstructions. Measurements of boundary shear stress, scour and fill of
the stream bed, and bedload transport rate and grain-size distribution were...
A record of the first seventy years in the life of Oregon State College - the illustrated story of her growth to the "major industry in the state', complete with the changing life and activity of her students and alumni.
This thesis is a collection of four submitted manuscripts that present
methods to assist forest ecosystem service managers wanting to develop
operational sampling, monitoring, and production plans for a set of
specific quantifiable ecosystem services, which are formulated as a
series of general multi-objective optimization problems. The problems
are solved...
Rapid, shallow soil mass movements (landslides) are examined for a 6,000 ha managed forest area in the Oregon Western Cascades. Analysis of landslide occurrence considers the physical characteristics and frequency, the influence of clearcutting and road construction, and some resource impacts. Nonparametric statistical methods
are employed to test the significance...
Since 1979, over $114 million of natural gas has been produced at the Mist Gas Field, currently the only commercial gas field in the Pacific Northwest. In the Mist Gas Field, the sandstone-dominated Clark and Wilson member of the upper Eocene Cowlitz
Formation is the reservoir and the overlying upper...
A field study was conducted to determine the impact of microclimate and vegetation on
survival and growth of planted Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) at a pinegrass (Calamagrostis rubescens Bucki.) dominated clearcut in the Interior Douglas-fir Zone of south-central British Columbia. The study focussed on (1) the water balance of...
This was a two part study to develop self-instructional material to meet the needs of students and teachers in an individualized clothing construction program.
First, two self-instructional kits were prepared, called Skills of Sewing Kits (SoS Kits), to teach stay-stitching and a lapped zipper application. Each kit contained guidelines for...
The recent colonization of Oregon by an exotic, intentionally introduced coccinellid, Harmonia axyridis, was the basis for lab and field research into lady
beetle developmental biology and community composition. Harmonia axyridis was the dominant coccinellid in an arboreal habitat, and comprised over 70% of all lady beetles, and 82% of...
What students need most from instructors’ written response on their texts is commentary that evokes a sense of exchange. Teachers often believe that their job is to point out the deficits in a student’s paper and help eliminate those deficits. While this is a part of the function of response,...
Vladena Aleksandra Dmitriev, in her collection of fiction and nonfiction The Mercurial: Stories and Essays, examines the conflicts inherent in language, whether in her own experiences as a non-English speaking immigrant from the Soviet Union to the submersed anger and resentment that emerges quietly in disintegrating relationships. What unites these...
This report describes the observations and opinions of Douglas County homeless youth and of the social service providers and advocates focused on assisting them. Initiated by the county’s Commission on Children and Families, and conducted by Oregon State University researchers, this study provides data and analysis which may assist service...
Maps of the Wildland-Urban Interface (WUI) are both pragmatic policy tools and powerful visual images with broad appeal. While the growing number of WUI maps serve the same general purpose, this paper demonstrates that WUI maps based on the same data can differ in ways related to their purpose, and...
Building community capacity is a central concern of both policymakers and community residents. Both want to understand why some communities are more successful in achieving positive social, economic and environmental outcomes, and how to increase the capacity of communities to achieve these outcomes. This is particularly true in communities that...
How does one identify, articulate, and relate the forces and influences at work in different geographic places? A satisfactory answer to this fundamental question is required for the formulation of a place-based public policy. Since 1986 the authors of this paper have been concerned with this question, and have evaluated...
In this report we explore alternative ways of defining “rural” by mapping and comparing four different classification systems: three created for nationwide use, and one created specifically for Oregon. Several of the most frequently noted differences between the ‘two Oregons’ are the lower educational attainment, lower employment rate, lower average...
In 2003 the US Census Bureau found that 11.2% of the United States population was food insecure at some time during the year. The curious nature of such statistics only increases when we shift our gaze to the state of Oregon. This state enjoys a temperate climate and good farmland,...
Testimony of Roger B. Hammer, Assistant Professor, Department of Sociology, Sustainable Rural Communities Initiative,
Oregon State University before the House Interior, Environment & Related Agencies Appropriations Subcommittee,
Oversight Hearing on Wildfire Management, February 12, 2008
Improving the quality of education and encouraging students to stay in school is one possible strategy for reducing poverty and raising local well-being in rural areas. A potential obstacle to this strategy, however, is outmigration to metro areas due to the lack of demand for this better-educated rural workforce, and...
Using the Current Population Survey and its Food Security Supplement for 2002-2004, this analysis examines food insecurity and hunger in the Northwest. First comparing to earlier analyses, we document decreasing food insecurity and hunger for Oregon and Washington as a whole. Consolidating those two states and Idaho to describe the...
As the extent of household food insecurity in the US has become better understood, policymakers at the federal and state levels have sought to learn more about the multiple causes of food insecurity. Some have sought the explanation in the personal choices about marriage, child bearing, education and other life...
Oregon has had the highest hunger rate among all U.S. states for four of the last five years. In this report, we re-examine the data on which these rankings were computed and explore how Oregon’s food insecurity and hunger rates vary across demographic groups.
This report is intended to increase the understanding of interrelationships in a small farming community. It consists of three main sections. First, it begins with an historical review of agriculture in the Willamette Valley, Oregon. Since every agricultural region has unique components it is important to begin any modeling process...