Digital Commons Network^™

Tracking Center Of Mass With Limited Inertial Measurement Units, Connor Nathaniel Morrow

Dissertations and Theses

Wearable motion tracking systems pose an opportunity to study and correct human balance and posture during movement. Currently, these observations are either being conducted in laboratories with the use of camera systems and markers placed on the body, or through the use of suits containing large numbers (15-20) of inertial measurement units. However, to aid with rehabilitation of individuals with impaired balance, there needs to be an option to collect these observations outside of clinics and without incurring much cost from the user. I have focused on three inertial measurement units, one placed on each shank and one placed on …

Seismic Source Characterization Of Faults In The Portland And Tualatin Basins And A Paleoseismic Study Of The Gales Creek Fault, Or, Alison Elizabeth Horst

Dissertations and Theses

Portland, OR lies within the tectonically active forearc of the Cascadia subduction zone. Several, potentially hazardous, northwest striking faults in and around the Portland Basin are classified as Quaternary active by the USGS, but little is known about their Holocene activity. Geologic and geodetic studies in the Pacific Northwest (PNW) document ongoing clockwise rotation of the region since at least 16 Ma. Models for crustal deformation in the PNW suggest northwest trending faults accommodate dextral shear inferred from increasing clockwise rotation rates west of Portland. I compiled structural information to improve the seismic source characterization of these faults, and using …

Concrete Bridge Deck Performance Data And Metrics For The State Of Oregon, Jael Wettach-Glosser

Dissertations and Theses

Bridge decks are a critical element of a bridge that support and distribute vehicle loads to the superstructure. Because of the requirements of this role, bridge decks are exposed to severe conditions that typically lead to structural deficiency in bridges which is both costly and disruptive. Therefore, to keep bridges and highways in good repair, developing optimal preservation decisions for concrete bridge decks is key. In order to develop effective performance monitoring and preservation schedules, the parameters affecting bridge deck deterioration need to be better understood.

With guidance from the literature and Oregon Department of Transportation (ODOT) personnel, two datasets …

Correct-By-Construction Typechecking With Scope Graphs, Katherine Imhoff Casamento

Dissertations and Theses

Dependently-typed languages are well-known for the ability to enforce program invariants through type signatures, and previous work establishes the effectiveness of this style of program verification in the implementation of type-safe interpreters for a wide class of languages with a variety of interesting scoping semantics, offering an account of dynamic semantics. This thesis covers the complementary topic of static semantics, in the form of a pattern for constructing verified typechecking procedures in a dependently-typed setting. Implementations are given for simply-typed lambda calculus and a small procedural language as well as a module system with unrestricted cyclic module dependency semantics that …

Manufacturing In Place: Industrial Preservation In The Us, Jamaal William Green

Dissertations and Theses

In the face of growing economic inequality and population growth, several large cities in the US have started to proactively protect vital industrial lands from conversion to non-industrial uses. These new policies signal a potentially dramatic shift in both land-use and economic development practices.

In the first essay of this dissertation I present a typology of existing industrial land protective policies after reviewing the comprehensive plans and zoning codes of the United States' fifty largest cities. I identify 11 cities with protective policies and highlight the variance of these policies by offering a simple two part typology based upon a …

Cooperating Teachers' Perceived Preparedness To Support Science Teacher Candidates For Culturally Sustaining Science Teaching, Keelan Purcell Lofaro

Dissertations and Theses

In the United States, many communities face challenges that require science, technology, engineering, and math (STEM) solutions. Those communities most affected by these challenges often lack opportunities in school to use their funds of knowledge as they develop STEM literacies that would equip them to address these challenges. With new national science standards and increasingly diverse student demographics in classrooms across the United States, teacher educators must utilize strategies that prepare science teacher candidates, who are predominantly White, with pedagogies that can support diverse learners in expanding their STEM literacies from their funds of knowledge. The problem of practice guiding …

The Cosmological Empire Of Pliny The Elder: An Examination Of Political Themes In The Second Book Of The Historia Naturalis, Kevin Alan Mccormick

Dissertations and Theses

Pliny the Elder's Historia Naturalis, written in the 70s CE and perhaps left unfinished at its author's death in 79, is among the largest documents to have survived down to us from antiquity. It comprises some thirty-seven books on a breadth of topics about the natural world, and man's interaction with the world and marshalling of its resources. The work has often been referred to as the world's first encyclopedia. Recent scholarship has rescued Pliny's reputation from its degradation among the scholars of the early twentieth century, and modern scholars have approached the document via several analytical avenues, including …

"Smart" Technology: Do You Buy It? Adoption Of Digital Innovations, Laura Koyer Glass

Dissertations and Theses

With the increase in "smart" devices that connect to the internet, it is important to study how individuals perceive characteristics of innovations and how those perceptions relate to adoption behavior. This paper explores how attributes delineated by the diffusion of innovations (DOI) model (relative advantage, compatibility, visibility, trialability) and technology acceptance models (TAMs; perceived usefulness, ease of use) correlate with one's interest in using an internet-connected device. Eligible survey responses were collected from 116 participants which evaluated individual perceptions of new technology. Subsequently, quantitative analysis explored the relationship between individuals' technology perceptions and purchasing intentions. The current research extends pre-existing …

Patient And Provider Perspectives On Sexual History Taking During Gynecological Care: A Pilot Study In An Academic Family Medical Setting In New York City, Ashley M. Chastain

Dissertations and Theses

Background: In the United States (US), women face a number of serious issues concerning sexual health. Current surveillance data indicates that overall rates of bacterial sexually transmitted infections (STIs) are increasing rapidly. While rates of new diagnoses have decreased, the risks of acquiring HIV are still relatively high for some females, specifically Black/African-American women. In New York City (NYC), where this dissertation research was conducted, similar HIV/STI rates exist among females of reproductive age (aged 15-44). Among women in the US, there are also high estimated rates of other sexual health problems, such as sexual anxiety, sexual dysfunction, and intimate …

Annual And Seasonal Variation In Hydrologic Performance Of Ecoroofs Of Multiple Depths, Portland, Or, Ashley Michelle Baker

Dissertations and Theses

It is essential that cities adopt new approaches to stormwater management in the face of changing precipitation regime. In some locations, ecoroofs have been incorporated into city plans as a stormwater control measure, and thus their real-world performance under current conditions can assist with adequate planning. In this study rainfall retention data collected during a three year period, between 2014-2017, is analyzed for 75mm and 125mm ecoroof plots in Portland, Oregon, USA. There is no difference in annual rainfall retention performance between the shallower and deeper plots. However, the 36% mean annual retention of the ecoroof plots is a significant …

The Invasion Ecology Of Ivy (Hedera Spp.) In Portland's Forest Park, Eric Paul Butler

Dissertations and Theses

Invasive ivy (Hedera spp.) has extensive impacts on Pacific Northwest urban forests, many of which are not yet fully understood. In this study of Forest Park, Portland, Oregon, I evaluated several environmental variables obtained or derived from monitoring datasets at three spatial scales to determine the following: how ivy is spatially distributed; what factors are most correlated with ivy abundance; and how ivy abundance influences shrub community composition. I found that ivy is significantly clustered at all scales with multiple apparent epicenters along the park's urban periphery. Using NMDS ordination, I determined that ivy is a significant factor in …

Understanding The Politicization Of Oromo Identity In The Diaspora: Re/ Locating The Bones Of The Oromo, Madeline Jaye Bass

Dissertations and Theses

The Oromo people of Ethiopia share a common language, worldview, set of sacred meanings, and a historic system of governance. The rise of the Abyssinian Empire in the late 1800s led to the colonization of the Oromo; their language and religion were made illegal, their homeland was expropriated and renamed, and they were forced to live as slaves on their own land. After the end of the Abyssinian colonial era, historic discrimination was institutionalized into the new Ethiopian state form through the politicization of identities. Ethnic identities become political identities when cultural traits are used by the state as criteria …

The Impact Of Implementing Different Cordon Size Designs On Land Use Patterns In Portland, Or, Asia Spilotros

Dissertations and Theses

The purpose of this research dissertation is to compare the effects of using small, medium, and large cordon designs in road tolling on residential and commercial neighborhoods in Portland, Oregon. Changes in land use patterns are assessed by comparing the projected output of each cordon scenario to a "no toll" alternative in 2035. The performance of each cordon design is tested using two different prices ($1.65 and $8) and compared to a default scenario 25 years after the initial implementation in MetroScope's year 0, 2010. The following areas embedded within the cordon perimeter were considered in determining changes in land …

Modeling Surface Roughness As An Indicator Of Age And Landslide Susceptibility, And The Spatial Inventory Of Prehistoric Landslides: Green River Valley, Washington, Rebecca Naomi Garriss

Dissertations and Theses

Developing detailed landslide inventory maps of prehistoric landslides is essential to interpret the frequency and conditions under which slopes have failed. When coupled with age estimates, landslide inventories can yield better predictions for future slope failures, thereby improving hazard assessments and increasing chances for mitigation. Developing proxies for landslide age is an important area of research, but age dating prehistoric landslides can be challenging due to sparse datable organic material within landslide deposits, and to time or access constraints. In this thesis, surface roughness of the landslide deposit is used to construct a best-fit age-roughness model that quantitatively assigns age …

Differences In Syntactic Complexity In The Writing Of El1 And Ell Civil Engineering Students, Santiago Gustin

Dissertations and Theses

Traditional studies in syntactic complexity consider increased clausal complexity to be characteristic of development, proficiency and growth in written language production. However, this stereotypical view ignores two important facts. First, complexity differs by register (i.e. daily speech versus formal writing). Second, as the proficiency of writers increases, their complexity in formal writing changes from clausal complexity to phrasal complexity (i.e. lower-proficiency writers have more subordinate clauses whereas higher-proficiency writers tend to have more noun phrases). Therefore, in this study, I argue for the need to consider not just clausal complexity but also phrasal complexity measures when assessing development and performance …

Non-Contact Distillation, Rawand Muzafar Rasheed

Dissertations and Theses

Leidenfrost phenomenon has been studied extensively for its role in applications ranging from nuclear reactor cooling, to metals manufacturing, combustion, and other fields. Herein, Leidenfrost phenomenon is pursued towards non-contact distillation processes with hopes of reducing or even eliminating contaminant fouling. In particular, the microgravity environment of a drop tower is exploited to demonstrate the facility with which droplets achieve and sustain the Leidenfrost state. Dynamic Leidenfrost impacts in microgravity are presented for impacts on hydrophilic and superhydrophobic planar substrates, macro-pillar arrays, confined passageways, and others. Nearly ideal elastic non-contact impacts and droplet oscillation modes are observed. Dynamic Leidenfrost impacts …

The Influence Of Neighborhood Landscape Characteristics On Native Bird Communities: Implications For Increasing Biodiversity In Our Yards, Michael E. Vermeulen

Dissertations and Theses

Avian communities, because of their potential high diversity, are ideal for studying the response to potential quantity of resources provided by local and regional habitat. Urban neighborhoods vary in types and magnitudes of anthropogenic stressors they experience, resulting in a continuum of anthropogenic disturbance, often referred to as a gradient of urbanization. The aim of this study was to investigate anthropogenic drivers of urban bird communities in three Portland, OR neighborhoods (Hillsdale, Lents, and Pearl). The three major questions of this study were: 1) What are the significant landscape traits that characterize the neighborhoods? 2) Is there evidence that the …

Hiv, Stigma, And Attribution Of Causal Emotions, Zoe Elizabeth Larson

Dissertations and Theses

Stigmatization of people living with HIV/AIDS is considered a major barrier to the treatment and prevention of HIV/AIDS. Attribution theorists have examined stigmatizing attitudes as a product of causal emotions; to wit, people face greater judgment and stigmatization when their actions are perceived as controllable and less stigmatization when actions are perceived as out of the realms of personal control. The current study examined attribution of causal emotions for three different circumstances of HIV acquisition, which varied in their perceived controllability. The results showed statistically significant differences in participant evaluations of responsibility, blame, and anger. Statistically significant correlations were found …

The Tangle Of Institutional Care And Control At A Shelter For Commercially Sexually Exploited Youth, Liat Tzvia Mayer

Dissertations and Theses

My cultural anthropology master's thesis focuses on the workings of Inanna House, an emergency shelter/residential program for commercially sexually exploited (CSEC) youth in Portland, Oregon. In the summer of 2017, I did participant observation and interviewed youth and direct care staff members at the CSEC shelter I had been working at for 2 years. I begin by situating ideas about domestic minor sex trafficking (DMST) within larger historical, legal, economic, and political contexts. I consider concepts of childhood, race, class, gender, and sexuality on the story of DMST in the United States.

Next, I explore the ways humans and institutions …

Avian Dispersal Networks, Metacommunity Structure, And Bryophyte Community Assemblages, Matthew Wojciech Chmielewski

Dissertations and Theses

Spatial processes have a profound influence on the structure and function of community assemblages. The dispersal of organisms from their place of origin to the location in which they live out their reproductive life is particularly important for plant communities, which generally cannot adjust their location post-germination. Connection between communities at a landscape scale can also influence species persistence, local and regional diversity, and functional turnover at the metacommunity scale. Animals have been shown to disproportionately deposit propagules in particular microsites in many plant species, facilitating the arrival of plants to appropriate niche-space. Birds are particularly notable seed dispersers, given …

Modeling Vertical Migration Of Cyanobacteria And Zooplankton, Corina Christina Mae Overman

Dissertations and Theses

Cyanobacteria, also known as blue-green algae, often cause harmful algal blooms and release toxic substances that can harm humans and other animals. Accurately modeling these phytoplankton is a step towards predicting, preventing, and controlling such blooms. Cyanobacteria and zooplankton species are known to migrate vertically in the water column on a daily cycle. Capturing this behavior is one aspect of correctly modeling their dynamics. Here, several models of cyanobacteria vertical movement were tested in proof-of-concept models before being applied to data from field studies. These models included both continuum and particle-tracking frameworks. Four continuum-framework models of cyanobacteria vertical migration were …

The Relationship Between Undergraduate Research Training Programs And Motivational Resources For Underrepresented Minority Students In Stem: Program Participation, Self-Efficacy, A Sense Of Belonging, And Academic Performance, Jennifer Lindwall

Dissertations and Theses

Although calls for a more diverse workforce in biomedical fields have been widespread, racial and ethnic gaps in biomedical degree attainment persist. In order to succeed, URM STEM students must persevere despite numerous challenges and stay continuously motivated on the long road to degree attainment in biomedical disciplines. Past higher education research has identified two key self-appraisals, a sense of belonging and self-efficacy, as crucial for student success. These beliefs, which can serve as motivational resources for students, include students' convictions about whether they are a valued member of their academic community and whether they have what it takes to …

"All Things To All Men": The Life And Work Of Monsignor Thomas J. Tobin, Priest Of The Archdiocese Of Portland In Oregon, Samuel Richard Mertz

Dissertations and Theses

This thesis is a biographical study of the life and work of Monsignor Thomas J. Tobin, a priest of the Archdiocese of Portland in Oregon. It covers his leadership in the labor movement during World War II, his participation in the Liturgical Movement, and his efforts to bring the Catholic Church in Oregon into ecumenical dialogue with other Christians. It culminates in his involvement in the Second Vatican Council. His activism can only be truly understood within the context of Oregon's vibrant progressive movement, a movement that carried disproportionate influence in a state that was in many ways politically conservative …

How Does Wasta Bolster Regimes? The Case Of Tunisia, Issrar Chamekh

Dissertations and Theses

This paper aims to highlight the impact of democratization on wasta by examining the everyday performance of wasta, or the use of connections and informal networks to acquire services. Despite its widespread use, I find that it is understudied as an explanatory variable in the literature on democratization and authoritarianism in the Middle East and North Africa, with Tunisia as a case study. In this paper, I argue that wasta can potentially have a consolidating effect on regimes. I examine the ways that wasta is encoded in everyday language. Using literature from Pragmatics, specifically Goffman's dramaturgical model, I find that …

Evaluation Of Low And High Frequency Dynamic Response For Condition Assessment Of Reinforced Concrete Structures, Ali Hafiz

Dissertations and Theses

Concrete is widely used for civil infrastructure structures and they experience deterioration and degradation due to aging, increases in the traffic loads, harsher environmental conditions, use of deicing chemicals, etc. Therefore, evaluating the integrity of reinforced concrete structures has become of increasing interest for infrastructure owners and managers. A number of non-destructive testing (NDT) and structural health monitoring (SHM) methods have been developed in recent decades to aid in evaluating structures and provide input for asset management. One family of these methods uses the dynamic response of a structural member: stress waves (high frequency) and structural vibrations (low frequency). Both …

Does X Mark The Applicant? Assessing Reactions To Gender Non-Binary Job Seekers, Kelly Mason Hamilton

Dissertations and Theses

The number of individuals who identify as a non-binary gender has almost tripled over the last 10 years. This growing population, and the legal protection against sex discrimination afforded to them under Title VII, puts a responsibility on employers to better understand their experiences in the workplace. The purpose of the current study was to examine how disclosing a non-binary gender identity when applying for jobs influenced hiring outcomes. Specifically, my study assessed (a) hiring managers' beliefs about non-binary gender identities, (b) how those beliefs impacted hiring managers' perceived ability to provide social support to prospective applicants, and (c) how …

Reproduciendo Otros Mundos: Indigenous Women's Struggles Against Neo-Extractivism And The Bolivian State, Gisela Victoria Rodriguez Fernandez

Dissertations and Theses

Latin America is in a political crisis, yet Bolivia is still widely recognized as a beacon of hope for progressive change. The radical movements at the beginning of the 21st century against neoliberalism that paved the road for the election of Bolivia's first indigenous president, Evo Morales, beckoned a change from colonial rule towards a more just society. Paradoxically, in pursuing progress through economic growth, the Bolivian state led by President Morales has replicated the colonial division of labor through a development model known as neo-extractivism. Deeply rooted tensions have also emerged between indigenous communities and the Bolivian state due …

Assessment Of Cluster Chondrite Accretion Temperature Using Electron Backscatter Diffraction And Implications For Chondrule Formation Models, Secana Portia Goudy

Dissertations and Theses

This thesis studies ordinary chondrites with cluster chondrite lithologies using electron backscatter diffraction so as to measure the temperatures of their olivine grains during deformation, for the purpose of constraining the accretion temperatures of cluster chondrites and creating new constraints on chondrule formation models. Samples analyzed with the technique are shock classified in this thesis as S1 and are type 3, so the deformation analyzed is interpreted to represent the temperatures of the chondrules during accretional deformation. It is found that the studied samples are primarily composed of chondrules at hot temperatures (>850°C) during deformation, mixed with a questionable …

Relationship Between Empathy And Language Proficiency In Adult Language Learners, Mika Sakai

Dissertations and Theses

This study reviews concepts and the mechanism of empathy, and the relationship between empathy and language proficiency, focusing on the aspect of cognitive empathy. It also discusses whether empathy levels could be developed by learning language to a highly proficient level. I compared the empathy levels between high and low proficiency second-language learners to determine if there was correlation between empathy and other factors such as gender, studying abroad, education background, and usage of a second language. I found that there was no relationship between empathy level and language proficiency level; however, there was one between empathy and gender. For …

Early Intervention Referral Outcomes For Children At Increased Risk Of Experiencing Developmental Delays, Kristi Laurine Atkins

Dissertations and Theses

Research has shown that children born low birth weight (i.e., ≤2500 grams) and/or premature (i.e., birth prior to 37 weeks gestation) are at increased risk of experiencing developmental delays, as well as long-standing executive functioning and academic challenges. Despite these well-known risks, children born low birth weight are under-enrolled nationally in Part C Early Intervention (EI) services intended to support developmentally vulnerable children. Little is known regarding why EI enrollment is low in this high risk population, especially given children born LBW are readily identifiable as at increased risk of delays at birth. This study explored EI referral outcomes from …