Digital Commons Network^™

Spatial Analysis Of Burglary And Robbery Crime Concentration Near Mass-Transit In Portland, Bryce Edward Barthuly

Dissertations and Theses

The relationship between mass-transit and the concentration of burglary and robbery crimes is inconsistent within the available literature in environmental criminology. A number of studies have provided evidence of crime concentration at and near mass transit locations where paths intersect, referred to as a node. These empirical studies bring in environmental criminology theory with the idea that crime is clustered, and the pattern of the concentrations is substantially influenced by how and why people travel and move in a city. It is suggested that public transit allows for a large proportion of the population to move around the community along …

Convivial Clothing: Engagement With Decommodified Fashion In Portland, Or, Sarah Guldenbrein

Dissertations and Theses

In a capitalist system demanding perpetual accumulation, producers invest significant resources into proving the superiority of new products over existing ones. When the normative concept is "better" rather than "good" consumers can never reach a sense of sufficiency. One countermovement is that of degrowth. Degrowth scholars advocate for a voluntary and democratic transition to a post-growth future. This thesis contributes to the emerging literature on degrowth by examining alternatives to "fast fashion," an industry with a huge environmental impact and notoriously high turnover. Drawing on participant observation and semi-structured interviews with participants in Portland, Oregon's clothing swaps and Repair …

Politics In The San Clemente Dam Removal, Aylan Matthew Lee

Dissertations and Theses

This study examines the role of politics in the removal of the 106-foot tall San Clemente Dam. The removal project and negotiations provide a case study of the contemporary phenomenon of dam removal. My analysis joins a growing body of social science literature on the social, political, and human dimensions of removal. The San Clemente Dam, which impounded the Carmel River near Monterey, California, was removed in 2015, the largest such project completed in California. Drawing on political ecology and science and technology studies, and using a mixed qualitative approach, I assess both the role of politics in shaping the …

Characterizing Tilt Effects On Wind Plants, Ryan Scott

Dissertations and Theses

Tilting the nacelle of a wind turbine modifies entrainment into the wind plant and impacts total efficiency. Extreme angles can produce flying and crashing wakes where the wake either disrupts entertainment from the undisturbed flow above or is decimated on the ground. The effect of tilt angle on downstream wake behavior was investigated in a series of wind tunnel experiments. Scale model turbines with a hub height and diameter of 12 cm were arranged in a Cartesian array comprised of four rows of three turbines each. Nacelle tilt was varied in the third row from -15° to 15° in chosen …

Forest Structure, Composition, And Regeneration After High-Severity And Rapidly Repeated Wildfires In The Central Cascade Range, Sebastian Upton Busby

Dissertations and Theses

Within mid-to-high elevation conifer forests in the Cascade Range, wildfire extent, severity, and frequency are expected to rise due to increasingly drier forest fuels under climate change. Considering dominant species composition, existing forests may be poorly adapted to absorb stress and recover following altered wildfire patterns. We tested the hypothesis that increased fire activity may disrupt the recovery of upper-montane and subalpine forest types by quantifying post-fire forest structure and conifer regeneration after spatially large, severe, and rapidly repeated wildfires in the Central Cascade Range. A stratified random sampling design was used to select field plots (n=122) and drivers of …

Confronting Noh Demons: Zeami's Demon Pacifying Noh And Nobumitsu's Demon Killing Noh, Jitsuya Nishiyama

Dissertations and Theses

Noh is often described as a drama of the exploration of the soul. This focus on the human soul is largely attributed to Zeami Motokiyo ä (c. 1363-c. 1443), the greatest playwright in the history of noh drama. This thesis, however, attempts a more comprehensive examination of the characteristics of noh plays by including works by Kanze Nobumitsu (1435-1516). Zeami and Nobumitsu wrote several demon noh plays, which are plays whose primary characters are demons. There are significant differences in characterization and dramaturgy between Zeami's demon noh in the early Muromachi period, the era of noh's founding, and Nobumitsu's onitaiji-mono …

Geothermometry Of H6 And L6 Chondrites And The Relationship Between Impact Processing And Retrograde Metamorphism, Michael Tyler Ream

Dissertations and Theses

Ordinary chondrites are the most common type of meteorite to fall to Earth and are composed of lithified primitive nebular materials which have experienced variable extents of thermal metamorphism and shock processing. They were subjected to radiogenic heating by incorporation of unstable short lived radionuclides such as ²⁶Al in the early solar system.

The relationship between metamorphism and impact processing in ordinary chondrites is not fully understood. An unresolved issue in the study of ordinary chondrites is whether their original parent bodies were fragmented by impacts into rubble-pile bodies while they were still hot, or whether they retained their …

Attitudes, Behavior, And Archetypes In The Clackamas River Basin: A Model Of Water Customer Analysis And Outreach For Watershed Protection And Conservation, Daniel Close Larson

Dissertations and Theses

Fresh water resources around the globe are under threat of diminishing supply and quality due to rapid population growth, climate change, drought, and waste. This dissertation aims to address the protection of fresh water at the source, the tap, and how water customer attitudes influence protection and conservation using a watershed-wide lens. Using the Clackamas River Watershed which resides within the Portland Metropolitan Area (PMA), I seek to investigate water customer attitudes towards a source water protection program and their willingness to pay to support such an endeavor, attitudes and behaviors that result in household water conservation, and an exploration …

Making Race Matter: Interrupting Racial Color-Blindness In Education Through The Implementation Of Anti-Racist Curriculum, Kelly Deits Cutler

Dissertations and Theses

The United States continues to be a highly racialized society. As a result, race remains a predictor of educational achievement for students in the PK-12 public education system. Concurrently, racial color-blindness continues to dominate educational institutions, as teachers--particularly White teachers--often feel uncomfortable and ill prepared to talk with students about race. One approach that educators have developed to combat color-blindness in schools is anti-racist curriculum. Such curriculum directly teaches students about race and intentionally interrupts the color-blind ideology.

This research study sought to understanding how teachers attending a series of collaborative professional development sessions experienced the process of designing and …

Teacher Learning In The Context Of Students’ Mathematical Thinking, Mary Sherrett Duden

Dissertations and Theses

Currently mathematics education is undergoing substantial changes so that students may experience mathematics in intellectually engaging, equitable, and relevant ways. More specifically, I am referring to a teacher stance of centering student thinking and allowing students to make sense of mathematical ideas. Proponents of reform efforts in mathematics argue that this is the path to helping elementary students develop a deep and conceptually sound understanding of mathematics. This is critical because a strong mathematical foundation has increasingly become a gateway for access to many career opportunities and citizenship in the United States.

Unfortunately, these ambitious changes present a challenge for …

Sensors And Portable Instruments For Postharvest Agriculture, Ryan M. Lerud

Dissertations and Theses

The sensing needs for the fresh produce industry can be split into two primary stages: during maturation in the field, also referred to as Precision Farming, and during storage and transport of the produce, or Postharvest Storage. This work seeks to improve the accuracy and reliability of commercially available electrochemical and spectroscopic sensors tailored to the sensing needs of the fresh produce industry. For electrochemical sensing, this study proposes the use of an inline filter to remove polar organic compounds, which can interfere with the readings of a platinum-based electrochemical sensor. A 50% improvement in measurement accuracy was achieved when …

Infinite Photovoltaic Solar Arrays: Considering Flux Of Momentum And Heat Transfer, Andrew D. S. Glick

Dissertations and Theses

Large scale solar farms supply an increasing amount of the worlds electricity supply. However, in order to reach cost parity with fossil fuels, further reductions are necessary. Towards this end, photovoltaic (PV) panel cooling becomes increasingly important; high temperatures both decrease efficiency and panel lifetime. To better understand, characterize, and exploit the natural convective cooling of utility scale solar farms, a model solar farm was created. Using both thermal measurements and particle image velocimetry to characterize heat transfer and velocity fields, wind tunnel experiments were conducted using the model solar farm. Three parameters were examined for their effect on heat …

Hydrologic Trends And Spatial Relationships Of Stream Temperature And Discharge In Urbanizing Watersheds In The Portland Metropolitan Area Of The Pacific Northwest, Emma Lee Brenneman

Dissertations and Theses

This study explores various relationships of streamflow and stream temperature over the Portland Metropolitan area in two urbanizing watersheds. Four stream temperature and discharge metrics were derived from USGS stream gauges in the Tualatin River and Johnson Creek watersheds and were analyzed for monotonic trends. Additionally, this study explored the sensitivity of stream temperature to air temperature and streamflow to assess where locations throughout the watershed may be more sensitive to these changes. Relationships among stream temperature, air temperature, and streamflow were assessed using linear and nonlinear bivariate regression for yearly values and summer months. Additionally, this study seeks to …

Identifying With Remida: Early Childhood Educators’ Experiences With Reuse Materials In Reggio Emilia Inspired Identity Studies, Michelle Angela Domingues

Dissertations and Theses

Mainstream approaches to identity studies in early childhood education (ECE) are problematic from both social constructivist and early childhood education for sustainability perspectives. Mainstream approaches are influenced by behaviorist theories of developmental psychology literature which privilege individual identity, whereas emerging discourses in identity theory trend toward discussing the multiplicity of social identities. Alternatively, and in contrast to traditional behaviorist and cognitive learning theories, cultural centers like Reggio Emilia, Italy’s Remida Creative Recycling Center promote reuse material projects that socially construct identities in Reggio’s Municipal Infant/Toddler Centers and Preprimary Schools by giving value to waste materials through offering such materials in …

Examining The Development And Classroom Dynamics Of Student Disaffection Over Multiple Time Periods: Short-Term Episodes And Long-Term Trajectories, Emily Anne Saxton

Dissertations and Theses

Student disaffection, a pervasive problem in middle school classrooms, is costly not only for disaffected students themselves (e.g., declines in GPA, high school drop out) but also for their teachers (e.g., stress-related health outcomes). Despite its importance, however, open questions remain regarding both the development of disaffection during early adolescence and the classroom dynamics that underlie changes in disaffection. This dissertation includes two free-standing manuscripts that explore these open questions regarding the development and classroom dynamics of disaffection. Each focuses on different developmental time scales and employs different methodological approaches to examine these important, but unanswered questions.

Drawing from a …

Application Of Single Particle Electron Microscopy To Native Lens Gap Junctions And Intrinsically Disordered Signaling Complexes, Janette Bernadette Myers

Dissertations and Theses

Gap junctions are a class of membrane proteins that facilitate cell-to-cell communication by forming channels that directly couple the cytoplasm of neighboring cells. The channels are composed of monomers called connexins. Humans express 21 connexin isoforms in a cell-type specific fashion, and each isoform has distinct mechanisms of permeation and regulation. Co-assembly of multiple isoforms into a single intercellular channel can change channel properties, such as conductance and selectivity to substrates (e.g., ions, metabolites and signaling molecules). However, the mechanistic basis for this functional diversity has remained poorly understood. This lack of mechanistic insight has been due in large part …

Aggregation Of Electric Water Heaters For Peak Shifting And Frequency Response Services, Thomas Leighton Clarke

Dissertations and Theses

The increased penetration of renewable energy sources poses new challenges for grid stability. The stochastic and uncontrollable generation of solar and wind power cannot be adjusted to match the load profile, and the transition away from traditional synchronous generators is reducing the grid capacity to arrest and recover from frequency disturbances.

Additionally, the distributed nature of many renewable energy sources makes centralized control of generation more complicated. The traditional power system paradigm balances the supply and demand of electricity on the grid by regulating generation. As this becomes more difficult, one alternative is to adjust the load instead. This is …

Family Linked Workplace Resources And Contextual Factors As Important Predictors Of Job And Individual Well-Being For Employees And Families, Jacquelyn Marie Brady

Dissertations and Theses

The inextricable ties between work and family have been extensively studied, however, with both societal and organizational change there is a continuing need for organizational research to elucidate the effects work can have on family, individual, and job well-being. Through three studies, this body of work demonstrates the role of supervisors, psychological contextual factors, and workplace work-family resources for improving employee and spouse family well-being and employee psychological and job well-being. This dissertation drew upon data from the Study for Employment Retention of Veterans (SERVe) and the Work-family Health Network (WFHN). Study 1 investigated the link between a supportive supervisor …

Dynamics Of Wet-Season Turbidity In Relations To Precipitation, Discharge, And Land Cover In Three Urbanizing Watersheds, Oregon, Junjie Chen

Dissertations and Theses

Frequent intense precipitation events can mobilize and carry sediment and pollutants into rivers, degrading water quality. However, how seasonal rainfall and land cover affect the complex relationship between discharge and turbidity in urban watersheds is still under investigation. Using hourly discharge, rainfall, and turbidity data collected from six stations in three adjacent watersheds between 2008 and 2017, we examined the temporal variability of the discharge-turbidity relationship along an urban-rural gradient. We quantified hysteresis between normalized discharge and turbidity by a Hysteresis Index (HI) and classified hysteresis loops during 377 storm events in early, mid, and late wet season. Hysteresis loop …

Physics-Based Signal Processing Methods For Terahertz Non-Destructive Evaluation Of Layered Media, Scott G. Schecklman

Dissertations and Theses

In recent years Terahertz (THz) time domain spectroscopy has emerged as a promising new technology with potential applications in a variety of fields, including industrial manufacturing, security screening and medical imaging. Pulsed THz systems are uniquely suited for non-destructive evaluation (NDE) of the sub-surface layers of dielectric packaging and coating materials, because they provide high dynamic range over a wide bandwidth in the far infrared portion of the electromagnetic spectrum. Often the dielectric materials of the packaging and/or surface coating layers exhibit relatively low loss and abrupt changes in the refractive index at the layer boundaries can be observed as …

Evaluating Project Assessment Techniques For High-Profile Transportation Projects Development And Delivery: Case Of State Departments Of Transportation (Dots) In The United States, Rafaa Ibrahim Khalifa

Dissertations and Theses

Time delays and cost overruns in construction projects are generally due to factors such as inappropriate planning, design errors, unexpected site conditions, inadvisable tools selection, change scope, weather conditions, lack of resources, and other project changes. Time delays and cost overruns are of concern to most project managers, owners, and governments. These elements of time and cost are two of the critical defects that impact the construction project delivery. These defects can lead to project failures and to various negative issues like increasing in disagreements among the project team, the contractor, suppliers, and the owner.

State Departments of Transportation (DOTs) …

Scenes From The Swale: Investigating Spatial And Temporal Dimensions Of Nitrogen Cycling In Urban Stormwater Bioretention Facilities, Erin Nicole Looper

Dissertations and Theses

Urban development is transforming landscapes at unprecedented rates. Human activities and landscape modifications associated with urbanization extensively increase hydrologic demands and modify natural hydrologic systems; consequently, population growth occurring in urban areas increases pressure on water resources. Urban aquatic ecosystems are vulnerable to impacts associated with increased connectivity with urban surfaces and hydrologic changes that initiate long-term changes in receiving waterbodies. Nitrogen (N) loading from urban and suburban catchments to receiving surface waters can lead to impairment of aquatic ecosystems and is a concern in many cities with water quality issues. To improve urban water quality, cities are increasingly adopting …

Photoelectrochemical Catalysis Of Hydrogen Peroxide With Tellurium Containing Chromophores, James Eliott Lohman

Dissertations and Theses

Growing concerns over climate change and demand for energy worldwide have made development and implementation of alternative energy sources more necessary than ever. Many of the leading energy alternatives suffer from inconsistent energy production due to fluctuations in availability of natural resources, and the current methods of addressing the issue have tremendous ecological and social ramifications of their own. While fuels like hydrogen gas are providing some promise of relief, the scope of infrastructure changes necessary for implementation and the implicit hazards of the use of such fuels complicate their application as an immediate solution. However, hydrogen peroxide carries far …

Strength Tuned Steel Eccentric Braced Frames, Hosam Abdullah Al-Azzawi

Dissertations and Theses

The primary component in eccentrically braced frames (EBF) is the link as its plastic strength controls the design of the frame as well as the entire building within which it is installed. EBFs are the first part of building design and every other component is sized based on the forces developed in the link. Oversized link elements lead to the use of unnecessary materials and can increase construction costs. Additionally, the advantages of using a continuous member of the same depth for both the link and the controller beam (in terms of the cost and the time) motivates researchers to …

Uhf And Microwave Phase-Modulated Scattering Array, Nasr Nomas Hussein Alkhafaji

Dissertations and Theses

This dissertation investigates the use an array of active nonlinear elements, with particular emphasis on controlling distortion products generated by nonlinear elements in space rather than using conventional ways such as transmission lines, waveguides, and power dividers and combiners. The nonlinear elements are made of assemblies of antennas and electronic switches, called modulated scatterers (MSs). These so-called MSs elements are utilized in a wide variety of applications such as radio frequency identification (RFID) systems, microwave imaging, Internet-of-Things sensors, etc. However, no research work has been reported in the literature regarding exploiting and controlling several distortion products generated by MSs at …

Development And Validation Of The Workplace Mental Illness Stigma Scale (W-Miss), Nicholas Anthony Smith

Dissertations and Theses

Although 1 in 5 Americans will experience a mental illness at some point, each year people with mental illnesses continue to face high levels of stigmatization and discrimination at work. Recognizing this, many organizational researchers and practitioners have sought to improve workplaces for employees with mental illness through a variety of organizational interventions. Unfortunately, few interventions are thoroughly evaluated. One barrier to evaluating such interventions is the lack of a theoretically meaningful measure of workplace mental illness stigma. In this dissertation, I proposed to develop and evaluate such a measure (the W-MISS) based on Jones, Farina, Hastorf, Markus, Miller, and …

Analytical And Numerical Modeling Of Long Term Changes To Tides, Storm Surge, And Total Water Level Due To Bathymetric Changes And Surge Characteristics, Ramin Familkhalili

Dissertations and Theses

Natural and local anthropogenic changes in estuaries (e.g., sea-level rise, navigation channel construction and loss of wetlands) interact with each other and produce non-linear effects. There is also a growing recognition that tides in estuaries are not stationary. These factors together are changing the estuarine water level regime, however the implications for extreme water levels remain largely unknown. Changes over the past century in many estuaries, such as channel deepening and streamlining for navigation have significantly altered the hydrodynamics of long waves, often resulting in amplified tides (a ~85% increase in Wilmington, NC since 1900) and storm surge in estuaries. …

Impactful Care: Addressing Social Determinants Of Health Across Health Systems, Nicole Lisa Friedman

Dissertations and Theses

There is emerging evidence that addressing health-related social needs through enhanced clinical-community linkages can improve health outcomes and reduce costs. Unmet health-related social needs, such as food insecurity, inadequate or unstable housing, and lack of access to transportation may increase the risk of developing chronic conditions, reduce an individual's ability to manage these conditions, increase health care costs, and lead to avoidable health care utilization. In response, work on social needs is happening across large health systems in the United States, but the pace of progress is slow and accountability is diffuse.

The goal of this applied research project is …

Radical Doulas Make "Caring A Political Act": Full-Spectrum Birthwork As Reproductive Justice Activism, Jadee Yvonne Carathers

Dissertations and Theses

This study, based on in-depth interviews with 30 self-identified radical doulas working in the US, describes the radical practices, positionality, and orientation towards reproductive justice that distinguish these care workers from mainstream doulas. Radical doulas provide nonjudgmental support in a full-spectrum of reproductive experiences from menarche to menopause according to the needs of their clients. As non-medically trained care workers, they provide informational, emotional, and physical support during abortion, birth and postpartum, fetal loss, adoption, or surrogacy, enacting individualized skill sets across settings from homes to hospitals and clinics. Radical doulas are paid professionals, but often offer a sliding-scale for …

A Mendelian Randomization Study Of Coronary Artery Disease And Three Amino Acids: Alanine, Glycine, And Glutamine, Allan Uribe

Dissertations and Theses

Cardiovascular disease is the leading cause of death worldwide. Coronary Artery Disease (CAD) accounts for the majority of those deaths. Observational studies have identified risk factors that have been helpful in lowering the death rate, including hypertension, high cholesterol, diabetes, smoking, physical inactivity and poor diet. The effects of these risk factors on CAD remain unclear. To clarify the effect of three amino acids, alanine, glutamine, and glycine on CAD I applied a two sample Mendelian randomization analysis to extensively genotyped observational data. In a sample with up to 184,000 individuals and approximately 60,000 controls, SNPs that reached genome wide …