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Ecosystem Recovery In Estuarine Wetlands Of The Columbia River Estuary, Sarah Ann Kidd

Dissertations and Theses

In the restoration of tidal wetland ecosystems, potential drivers of plant community development range from biotic controls (e.g. plant competition, seed dispersal) to abiotic controls (e.g. tidal flooding, salinity levels). How these controls influence the success of tidal wetland restoration are only partly understood, but have important implications for wetland habitat recovery. Specifically, the extent to which the existing native and non-native seed banks in tidally reconnected wetlands interact with these controls is not clear, yet the potential success of passive restoration methods depends upon this understanding.

For a 54-year chronosequence of eleven tidal wetland restoration sites in the Lower …

Wolbachia-Host Interactions And The Implications To Insect Conservation And Management, Amy Michelle Truitt

Dissertations and Theses

Parasitic reproductive endosymbionts are emerging as formidable threats to insect biodiversity. Wolbachia are prevalent maternally inherited intra-cellular bacteria found in >50% of arthropod species. These symbiotic bacteria interact with their hosts in diverse ways, most often they alter host reproduction causing four conditions that all selectively favor infected females: feminization, male killing, parthenogenesis, and cytoplasmic incompatibility (CI). Furthermore, depending on strain-type and host genetic background, Wolbachia are known to affect insect behavior, expand or shift host thermal tolerance ranges, and confer anti-viral protection to their hosts. Because Wolbachia both reside in and are transmitted with host cell cytoplasm, mitochondria and …

Drivers' Attitudes And Behaviors Toward Bicyclists: Intermodal Interactions And Implications For Road Safety, Tara Beth Goddard

Dissertations and Theses

Road safety concerns are a legitimate concern when promoting increased bicycle use. Currently, the share of bicyclist traffic fatalities and injuries is not proportional to its mode share, and presents both a public health concern and a disincentive to people taking up or continuing to bicycle for transportation. Bicycling is not an inherently dangerous activity; automobile drivers pose the most risk of harm in crashes with bicyclists. Despite that, drivers' attitudes and behaviors toward bicyclists have not enjoyed much systematic study, particularly in the United States. This research explored the dimensions of drivers' attitudes toward bicyclists, including implicit bias and …

Analyzing Dam Feasibility In The Willamette River Watershed, Alexander Cameron Nagel

Dissertations and Theses

This study conducts a dam-scale cost versus benefit analysis in order to explore the feasibility of each the 13 U.S. Army Corps of Engineers (USACE) commissioned dams in Oregon’s Willamette River network. Constructed between 1941 and 1969, these structures function in collaboration to comprise the Willamette River Basin Reservoir System (WRBRS). The motivation for this project derives from a growing awareness of the biophysical impacts that dam structures can have on riparian habitats. This project compares each of the 13 dams being assessed, to prioritize their level of utility within the system. The study takes the metrics from the top …

Settler Visions Of Health: Health Care Provision In The Central African Federation, 1953-1963, Catherine Janet Valentine

Dissertations and Theses

This thesis examines healthcare provision in the Central African Federation, the late colonial union between the British colonies of Southern Rhodesia, Northern Rhodesia, and Nyasaland (the later independent nations of Zimbabwe, Zambia, and Malawi respectively). Unusually in federal formations, healthcare delivery in the Federation of Rhodesia and Nyasaland became a federal function. "Settler Visions of Health" seeks to explain how the white settler elite reconciled the language of development and multiracial partnership with the underlying values of a settler society. Throughout its short existence, the Federal Health Service maintained a celebratory narrative of success designed to legitimize and justify both …

A Brief Intervention To Increase The Use Of Precorrection And Praise By Elementary School Teachers, Dustin Bindreiff

Dissertations and Theses

There is an evidence base supporting the use of positive behavior supports in schools; however effectively and efficiently transferring these interventions into classroom settings remains a challenge. Precorrection is a highly-regarded behavior support strategy that relies on antecedent prompting to reduce problem behavior and teach socially appropriate skills. This study examined how a brief training in precorrection and praise paired with regular feedback impacted the behavior of four Title I elementary school teachers and students. As a result of the intervention, the four teachers increased use of precorrection and praise, while concomitantly reducing their use of reprimands. Limitations and suggestions …

Investigation In To The Stabilizing Effects Of The Modified Base Archaeosine In Trna And The Identification Of The Fluorescent Product Of Base Treatment Of Nad(P)+ Cofactors, Ben Turner

Dissertations and Theses

This dissertation covers two projects linked by their involvement in the modification of tRNA bases.

The first project focused on an investigation of a role for the modified base Archaeosine, the ubiquitous modification in tRNA in the archaeal domain. Initial work was performed on a set of in vitro prepared tRNA modified to feature either the canonical guanine base at position 15, preQ₀ (TGT product) or Archaeosine (ArcS product). There was very little difference in the thermal stability of tRNAs containing these modifications in the halophilic H. volcanii tRNA^Ser or E. coli tRNA^Gln. In tRNA^{Gln …}

Grassroots Resistance In The Sustainable City: Portland Harbor Superfund Site Contamination, Cleanup, And Collective Action, Erin Katherine Goodling

Dissertations and Theses

How does progressive change happen in so-called sustainable cities? In this dissertation, I present findings from a three year-long ethnographic investigation of grassroots organizing in Portland, Oregon, a city at the leading edge of the green urbanism movement. This research centered on an extended case study of the Portland Harbor Community Coalition (PHCC). PHCC is an alliance of grassroots groups working to ensure that cleanup of the Portland Harbor Superfund Site benefits those who have been most impacted by pollution. In this dissertation, I develop three main empirical findings. First, despite depoliticized (sustainability) discourse permeating the harbor cleanup planning process, …

Primary Care And Mental Health Integration In Coordinated Care Organizations, Robin Lynn Baker

Dissertations and Theses

The prevalence of untreated and undertreated mental health concerns and the comorbidity of chronic conditions and mental illness has led to greater calls for the integration of primary care and mental health. In 2012, the Oregon Health Authority authorized 16 Coordinated Care Organizations (CCO) to partner with their local communities to better coordinate physical, behavioral, and dental health care for Medicaid recipients. One part of this larger effort to increase coordination is the integration of primary care and mental health services in both primary care and community mental health settings.

The underlying assumption of CCOs is that organizations have the …

Using Critical Physical Geography To Map The Unintended Consequences Of Conservation Management Programs, Melanie Malone

Dissertations and Theses

A variety of conservation trends have gained and lost favor throughout the years in agriculture, with U.S. Farm Bills often influencing what conservation practices are implemented by farming communities throughout the U.S. This dissertation focuses on the unintended consequences of conservation management practices in the Fifteenmile Watershed of Wasco County, Oregon. Specifically, I seek to address how farmer enrollment in various conservation techniques, loosely defined as no-till agriculture, has affected soil and water quality through the increased use of herbicide, and subsequently rendered ecological and human health vulnerable. Using a critical physical geography framework, I address both the biophysical factors …

Fully Generic Programming Over Closed Universes Of Inductive-Recursive Types, Larry Diehl

Dissertations and Theses

Dependently typed programming languages allow the type system to express arbitrary propositions of intuitionistic logic, thanks to the Curry-Howard isomorphism. Taking full advantage of this type system requires defining more types than usual, in order to encode logical correctness criteria into the definitions of datatypes. While an abundance of specialized types helps ensure correctness, it comes at the cost of needing to redefine common functions for each specialized type. This dissertation makes an effort to attack the problem of code reuse in dependently typed languages. Our solution is to write generic functions, which can be applied to any datatype.

Such …

Examination Of Human Impacts On The Biodiversity And Ecology Of Lichen And Moss Communities, Hannah Marie Prather

Dissertations and Theses

Globally, more than half of the world's population is living in urban areas and it is well accepted that human activities (e.g. climate warming, pollution, landscape homogenization) pose a multitude of threats to ecosystems. Largely, human-related impacts on biodiversity will hold consequences for larger ecological processes and research looking into human impacts on sensitive epiphytic lichen and moss communities is an emerging area of research. While seemingly small, lichen and moss communities exist on nearly every terrestrial ecosystem on Earth and contribute to whole-system processes (e.g. hydrology, mineral cycling, food web energetics) worldwide. To further examine human impacts on epiphytic …

African American Teacher Recruitment: A Case Study In Oregon, Deborah Miller Allen

Dissertations and Theses

The public school teacher population of the United States is predominantly White, while the demographics of P-12 student population continue to grow increasingly diverse. Across the nation, there has been a call for the recruitment and retention of culturally and linguistically diverse teachers. The state of Oregon passed the Oregon Educator Equity Act, originally called the Oregon Minority Teacher Act, in 1991, and with recent renewed attention, the preparation of more culturally and linguistically diverse teachers in the state has gained prominence. Refocused consideration to the lack of diversity in the teaching workforce is overdue, as evidenced by the low …

An Analysis Of Oregon Youth Authority Populations: Who Receives Treatment And What Factors Influence Allocation Of Treatment Resources?, Rebecca Arredondo Yazzie

Dissertations and Theses

Service provision in both adult and juvenile correctional settings is an understudied phenomenon. Research has evaluated the use of evidence-based practices (EBP) in the treatment of mental health and substance abuse among adults and juveniles. Young, Farrell, Henderson and Taxman (2009) highlight the role of organizational factors including climate and culture, opportunities for staff training, resources, administrator attitudes and interagency collaboration in the application of EBP in correctional settings. The Oregon Youth Authority (OYA) aims to provide services to youth under the guise of EBP. Literature in the field of juvenile justice is limited in scope in areas of organizational …

Middle School Teacher Beliefs About Classroom Diversity And Their Influence On Differentiated Instructional Practices, Marcus Fredrick-Lynn Wenzel

Dissertations and Theses

Diversity across U.S. classrooms is on the rise which is leading to renewed calls for teachers to meet individual learning needs. Studies indicate the failure to address individual learning needs can lead to higher rates of student disengagement, off-task behaviors, and diminished learning outcomes. Differentiated instruction is an approach to teaching that meets the growing diversity of individual learning needs by considering students' readiness, interest, and learning styles. Differentiated instructional approaches help teachers meet individual learning needs by allowing them to modify instruction as needed. However, despite the apparent benefits of differentiated instruction, teachers are hesitant to abandon other educational …

Early Layout Design Exploration In Tsv-Based 3d Integrated Circuits, Mohammad Abrar Ahmed

Dissertations and Theses

Through silicon via (TSV) based 3D integrated circuits have inspired a novel design paradigm which explores the vertical dimension, in order to alleviate the performance and power limitations associated with long interconnects in 2D circuits. TSVs enable vertical interconnects across stacked and thinned dies in 3D-IC designs, resulting in reduced wirelength, footprint, faster speed, improved bandwidth, and lesser routing congestion. However, the usage of TSVs itself gives rise to many critical design challenges towards the minimization of chip delay and power consumption. Therefore, realization of the benefits of 3D ICs necessitates an early and realistic prediction of circuit performance during …

Investigation Of Ambient Reactive Nitrogen Emissions Sources And Deposition In The Columbia River Gorge National Scenic Area, Jacinda L. Mainord

Dissertations and Theses

Anthropogenic reactive nitrogen is emitted into the atmosphere from fossil fuel combustion (nitrogen oxides) and agricultural activities (nitrogen oxides and ammonia). Nitrogen oxide emissions have long been controlled for their role in ambient air pollution and human health effects. However, reactive nitrogen deposition is less understood even though it can play a significant role in altering biodiversity, impairing ecosystem and biogeochemical function and degrading cultural artifacts. Although nitrogen deposition is a natural part of biogeochemical cycling, many ecosystems across the United States are at risk of exceeding the critical nitrogen deposition load. While nitrogen oxides are routinely measured in urban …

Rural Interprofessional Health Care Education: A Study Of Student Perspectives, Curt Carlton Stilp

Dissertations and Theses

As the cost for health care delivery increases, so does the demand for access to care. However, individuals in a rural community often do not have access to the care they need. Shortages of rural health care professionals are an ever-increasing problem. The Affordable Care Act of 2010 sought to increase health care access by focusing on team-based care delivery. Thus, the need to educate health care students in the fundamentals of team-based practice has led to an increased emphasis on Interprofessional Education (IPE). While past research focused on urban IPE, a literature gap exists for the effects of a …

Design And Application Of A 3d Photocatalyst Material For Water Purification, Simon Paul Fowler

Dissertations and Theses

This dissertation presents a method for enhancement of the efficiency and scalability of photocatalytic water purification systems, along with an experimental validation of the concept. A 3-dimensional photocatalyst structure, made from a TiO₂-SiO₂ composite, has been designed and fabricated for use in a custom designed LED-source illumination chamber of rotational symmetry that corresponds with the symmetry of the photocatalyst material. The design of the photocatalyst material has two defining characteristics: geometrical form and material composition. The design of the material was developed through the creation of a theoretical model for consideration of the system's photonic efficiency. Fabrication …

Not Just Child's Play: Neo-Romantic Humanism In Ogawa Mimei's Stories, Nobuko Horikawa

Dissertations and Theses

During the early twentieth century, Japan was modernizing in all areas of science and art, including children’s literature. Ogawa Mimei (1882-1961) was a prolific writer who advanced various literary forms such as short stories, poems, essays, children’s stories, and children’s songs. As a writer, he was most active during the late Meiji (1868-1912) to Taishō (1912-1926) periods when he was a socialist. During that time, he penned many socialist short stories and children’s stories that were filtered through his humanistic, anarchistic, and romanticist ideals. In this thesis, I analyze Mimei’s socialist short stories and children’s stories written in the 1910s …

An Efficient Pipeline For Assaying Whole-Genome Plastid Variation For Population Genetics And Phylogeography, Brendan F. Kohrn

Dissertations and Theses

Tracking seed dispersal using traditional, direct measurement approaches is difficult and generally underestimates dispersal distances. Variation in chloroplast haplotypes (cpDNA) offers a way to trace past seed dispersal and to make inferences about factors contributing to present patterns of dispersal. Although cpDNA generally has low levels of intraspecific variation, this can be overcome by assaying the whole chloroplast genome. Whole-genome sequencing is more expensive, but resources can be conserved by pooling samples. Unfortunately, haplotype associations among SNPs are lost in pooled samples and treating SNP frequencies as independent estimates of variation provides biased estimates of genetic distance. I have developed …

Generalized Differential Calculus And Applications To Optimization, R. Blake Rector

Dissertations and Theses

This thesis contains contributions in three areas: the theory of generalized calculus, numerical algorithms for operations research, and applications of optimization to problems in modern electric power systems. A geometric approach is used to advance the theory and tools used for studying generalized notions of derivatives for nonsmooth functions. These advances specifically pertain to methods for calculating subdifferentials and to expanding our understanding of a certain notion of derivative of set-valued maps, called the coderivative, in infinite dimensions. A strong understanding of the subdifferential is essential for numerical optimization algorithms, which are developed and applied to nonsmooth problems in operations …

Incorporating Place And Space: A Hierarchical Spatial Approach To Exploring Preventable Congestive Heart Failure Hospitalizations In New York City, Rachael Weiss Riley

Dissertations and Theses

Background: Faced with rising medical care costs, increasing prevalence, and widening health disparities, preventing congestive heart failure (CHF) hospitalizations is a central public health concern. Despite evidence of geographical clustering in preventable CHF admissions, there is a lack of research designed to examine spatial patterning of CHF and the local area neighborhood determinants that contribute to this variability. This study sought to assess and evaluate the importance of both space and place in analyzing preventable CHF hospitalizations and readmissions by applying appropriate statistical techniques, clarifying the assumption inherent in each method, and interpreting the findings within the context of existing …

The Role Of Socioeconomic Context In The Association Between Educational Attainment And Morbidity And Mortality, Jennifer Brite

Dissertations and Theses

Although the association between educational attainment and health is one of the most studied in the social science, little is known about the role of social and economic context. Fundamental Cause Theory suggests that the education-health gradient will be weakest in contexts where the better educated are unable to leverage their resources to achieve better health. This dissertation tests several different factors that may moderate the association between educational attainment and morbidity and mortality: 1. Demographic characteristics, including race, immigration status, and gender, 2. Status consistency (defined as education equivalent to that required for current occupation), 3. Unemployment rates at …

Transitional Healthcare Coordination In New York City Jails Among People With Chronic Health Conditions: Contributions To Reduced Reincarceration And Improved Health, Janet J. Wiersema

Dissertations and Theses

People in correctional settings often have poorer health than the general US population. For example, it is estimated that 27.9% of persons in jail have hypertension, 8.1% have diabetes, and 1.6% have HIV, compared to 25.6%, 6.5%, and 0.5%, respectively, in the general population. Jail and other correctional settings are also increasingly recognized as viable places to engage poor and underserved communities into the healthcare system by offering transitional care coordination services to connect people to healthcare and other services to meet priorities after incarceration. At the same time, recidivism is an issue—over 50% of persons in New York City …

A Multilevel Analysis To Understand The Role Of The Federal Vaccine Financing Program In Socioeconomic Disparities In Vaccination Coverage Among Children And Adolescents In New York City, Alexandra Ternier

Dissertations and Theses

A Multilevel Analysis to Understand the Role of the Federal Vaccine Financing Program in Socioeconomic Disparities in Vaccination Coverage among Children and Adolescents in New York City

Objectives: The purpose of this study was to examine the role of the federal vaccine financing program, the Vaccines For Children (VFC) program, in vaccine series completeness among children and adolescents in New York City. In addition, we aimed to investigate possible effect measure modification by selected neighborhood variables to explain socioeconomic disparities in vaccination coverage.

Methods: We used data from the New York City (NYC) Citywide Immunization Registry (CIR) and the American …

From Food To Food Justice: Pathways And Narratives Of Young Food Activists In New York City, Amy Kwan

Dissertations and Theses

With a rise in obesity and other non-communicable, diet-related health problems and the persistence of food insecurity among many vulnerable populations, the involvement of young people in the current, burgeoning food-justice movement has the potential to bring forth transformative changes to our food system and thus improve population health. While much is known about the outcomes of providing opportunities for young people to be actively and civically engaged in their communities, there is a lack of research on the pathways, narratives, and experiences that bring young people into food justice activism.

Through semi-structured, in-depth interviews with 25 young food activists …

Wicked Water Problems: Can Network Governance Deliver? Integrated Water Management Case Studies From New Zealand And Oregon, Usa, Jacqueline Dingfelder

Dissertations and Theses

Integrated water management is a wicked public policy problem with no clear path to resolution. This dissertation is an in-depth qualitative comparative analysis of two collaborative governance processes created to tackle complex water problems in New Zealand and Oregon, U.S.A. Both cases convened a wide range of state and non-state actors in efforts to find common ground, build consensus for change, and develop innovative water policy solutions.

The goal of this comparative case study analysis is to gain a better understanding of collaborative network governance frameworks as applied to integrated water management and primary factors for success. The proposition posits …

Profiles Of School Readiness And Implications For Children's Development Of Academic, Social, And Engagement Skills, Elizabeth Jane Tremaine

Dissertations and Theses

Academic achievement gaps across racial, ethnic, and socioeconomic groups are apparent as soon as children enter kindergarten: racial minorities, Hispanics, and poor children begin school at a distinct disadvantage compared to their White peers from middle- and high-income families (Chatterji, 2005; Fryer, Jr. & Levitt, 2004; Magnuson, Meyers, Ruhm, & Waldfogel, 2004; Magnuson & Waldfogel, 2005; Reardon, 2011). To understand these gaps at kindergarten entry, it is essential that researchers understand the skills with which children enter kindergarten.

Previous research on school readiness has been limited by variable-centered methods that separate components of school readiness (e.g., early academic skills, social …

Utilization Of Remote Sensing In Drought Monitoring Over Iraq, Yousif Almamalachy

Dissertations and Theses

Agricultural drought is a creeping disaster that overshadows the vegetative cover in general and cropland specifically in Iraq, a country that was well known for its agricultural production and fertile soil. In the recent years, the arable lands in Iraq experienced increasing land degradation that led to desertification, economic losses, food insecurity, and deteriorating environment. Remote sensing is employed in this study and four different indices are utilized, each of which is derived from MODIS satellite mission products. Agricultural drought maps are produced from 2003 to 2015 after masking the vegetation cover. Year 2008 was found the most severe drought …