Digital Commons Network^™

Exploring Mirna Function And Host Response To Coxiella Burnetii Infection, Madhur Sachan

Dissertations and Theses

Alveolar macrophages attempt to control bacterial infection through a spectrum of defense processes, including induction of apoptosis, autophagy, inflammatory response, and nutrient sequestration. MicroRNAs (miRNAs), a class of small non-coding RNAs, are involved in a spectrum of physiological processes, including immune response to intracellular infections. However, whether microRNAs have any functions in host response to Coxiella burnetii infection is unknown. Coxiella burnetii is a highly infectious intracellular pathogen that causes Q fever, a zoonosis with a worldwide occurrence. In this work, I investigated the functions of miRNAs in host response to C. burnetii infection and found that miRNAs are an …

Multi-Agent Radiation Localization, Teresa Nguyen

REU Final Reports

Advancement of radiation detection technology is an ongoing process, and adjustments are made based on pre-existing conditions of radiation presence--both natural and man made. Tools that are currently used for safely detecting radiation in urban environments exist in several forms: drones, robots, or handheld radiation detection devices. This is a harm reductive way to explore radiation-infected environments while preserving human health as best as possible. In order for these autonomous platforms to successfully detect radiation sources, an algorithm needs to be created that is capable of gathering crucial data on its own with little to no human interference. Machine learning …

The Effect Of A Ferrite-Core Relay Vs. An Air-Core Relay On The Output Power Characteristics Of A Three-Coil Wireless Power Transfer System, Jakob L. White

University Honors Theses

The purpose of this thesis is to determine the effect of using a ferrite-core relay on the output power characteristics of a three-coil, parallel-tuned, domino-resonator wireless power transfer (WPT) system in comparison to the effect of using an air-core relay in such a system. First, a general mathematical model is presented to describe both the ferrite-core-relay system and the air-core-relay system and to calculate their output power characteristics for seven different resistive loads at each of five different distance configurations between the coils. Next, experimental results are analyzed and compared to the mathematical results to confirm model accuracy. Finally, the …

Automated Statistical Structural Testing Techniques And Applications, Yang Shi

Dissertations and Theses

Statistical structural testing(SST) is an effective testing technique that produces random test inputs from probability distributions. SST shows superiority in fault-revealing power over random testing and deterministic approaches since it heritages the merits from both of them. SST ensures testing thoroughness by setting up a probability lower-bound criterion for each structural cover element and test inputs that exercise a structural cover element sampled from the probability distribution, ensuring testing randomness. Despite the advantages, SST is not a widely used approach in practice. There are two major limitations. First, to construct probability distributions, a tester must understand the underlying software's structure, …

A Cyber-Anthropological Interrogation Of East Asian Parenting Styles And Kinship Systems, Catherine Lefevre, Charles H. Klein

McNair Symposium

Cyber-anthropology is a crucial, and perhaps underexplored, aspect of contemporary anthropological research. Cyber-anthropologists seek to analyze and comprehend the seemingly complex reciprocal relations that exist between humans and computer driven realities. Cyber-anthropology is certainly applicable to ethnographic research and analysis. Dr. Amy Chua dissects the East-Asian cultural phenomenon of the “Tiger Mom” and the relatively strict parenting style often associated with Tiger Mothers and East-Asian cultural communities. This research paper examines East-Asian parenting styles, specifically the concept of the “Tiger Mom” and the correlatives that exist regarding academic performance, mental health and the disparities that often present themselves when examined …

Is Addicted Phenomenology Just Human Phenomenology?, Benji Mahaffey, Tom Seppalainen

McNair Symposium

The phenomenon of addiction precedes, by millennia, our scientific inquiries into its psychological manifestations and neural bases. We did not need psychiatrists to ‘discover’ it; we have long been aware of its dark shadow lurking in our psyches. The discernable, often troubling behaviors of addicts notwithstanding, addiction is not the kind of phenomenon one observes; addiction is experienced, from the first-person perspective. Its defining features are qualitative: a subjective loss of control, an obsession, a compulsion. The overwhelming phenomenological salience of these features—especially of “compulsion”—has led addicts, philosophers, and psychiatrists alike to imagine that addiction is a discrete (phenomenological, natural, …

Perceptual Mismatch Between Meso And Macro Policy At Tokyo International University, Brianna Ross, Kimberly Brown

McNair Symposium

Previous studies have aimed at looking at meso and micro policy levels of Japanese educational institutions and their English language teaching programs. Through conducting surveys and interviews, researchers gained knowledge of how, or if, institutions portray their standards to students and staff and how those goals are displayed through curriculum. This research shows a disconnect between the stated goals and in class instruction. While the researchers looked at overall disconnects, none looked at specific universities and their programs. My study aims to fill that gap, focusing on a university known for its English teaching and production skills. The intention is …

Experiences Of Undergraduates And Graduate Teaching Assistants In Biology Course-Based Undergraduate Research Experiences, Emma Crystal Goodwin

Dissertations and Theses

Evidence of positive student outcomes from course-based undergraduate research experiences (CUREs) has sparked implementation of CUREs in introductory biology laboratory courses, as one approach to boosting student engagement in research. In a CURE, students collaborate with other students and instructors on a research project, where they conduct novel scientific research that has relevance to a local or scientific community. However, previous research rarely considers that graduate teaching assistants (GTAs) often teach introductory labs. The classroom role of GTAs expands in a CURE--they no longer need to simply teach a lab class, but also to serve as research mentors. GTAs, who …

Information Security Maturity Model For Healthcare Organizations In The United States, Bridget Joan Barnes Page

Dissertations and Theses

This research provides a maturity model for information security for healthcare organizations in the United States. Healthcare organizations are faced with increasing threats to the security of their information systems. The maturity model identifies specific performance metrics, with relative importance measures, that can be used to enhance information security at healthcare organizations allowing them to focus scarce resources on mitigating the most important information security threat vectors. This generalizable, hierarchical decision model uses both qualitative and quantitative metrics based on objective goals. This model may be used as a baseline by which to measure individual organizational performance, to measure performance …

Mechanisms Of Connexin-46 And -50 Intercellular Channel Function And Stability By Molecular Dynamics Simulations, Bassam George Haddad

Dissertations and Theses

Gap junctions make up a class of intercellular channels that characteristically connect the cytoplasm of directly apposed cells through large assemblies, or plaques, constituted by a multitude of intercellular channels. Gap junction mediated intercellular communication is critical for a variety of physiological functions, from coordinating electrical impulses in the heart and brain to maintaining homeostasis in most tissues. There are 21 isoforms of connexins, the constituent subunit of the gap junction, expressed in a tissue dependent manner. Gap junctions formed from different isoforms exhibit distinct biophysical properties, such as gating kinetics and sensitivity, as well as unique permeability and selectivity …

Opportunities And Challenges In The Collection And Use Of Socio-Spatial Data In National Forest Planning, Diane Trechsel Besser

Dissertations and Theses

Understanding human-environment connections to places is an important component of land-use management. Tools for collecting geographically referenced public values-based data (defined as socio-spatial data) for use in natural resource planning have been reported in academic journals for decades. The utility of socio-spatial data is in making public values tangible and potentially actionable in land-use analyses and decision processes. However, there is a lack of comprehensive documentation on the ways in which socio-spatial data is perceived, collected, interpreted and applied at a practical level. A better understanding of these factors allows planners to mitigate barriers and leverage opportunities to more …

Lidar Predictive Modeling Of Pacific Northwest Mound Sites: A Study Of Willamette Valley Kalapuya Mounds, Oregon (Usa), Tia Rachelle Cody, Shelby Anderson

Anthropology Faculty Publications and Presentations

Archaeologists need new methods to survey large areas and overcome environmental and archaeological barriers to site discovery in heavily forested regions. LiDAR (light detection and ranging) technology is one possible solution to these challenges as LiDAR digitally clears away vegetation, facilitating large-scale remote sensing survey. The Calapooia Watershed, located in the southern Willamette Valley of Oregon, is an ideal area to utilize LiDAR. While valley lowlands are cleared for agriculture, riverine areas remain heavily wooded and are known to contain hundreds of low-lying earthwork features created by pre-colonial Kalapuyan people. To assess the potential application of LiDAR in this region, …

Participatory Gis Mapping Highlights Indirect Use And Existence Values Of Coastal Resources And Marine Conservation Areas, Kaegan M. Scully‐Engelmeyer, Elise F. Granek, Max Nielsen-Pincus, Greg Brown

Environmental Science and Management Faculty Publications and Presentations

Consideration of social and cultural dimensions in coastal and marine planning has increased and ecosystem services provide important framing to investigate values and priorities associated with these systems. Research efforts in coastal communities offer insights on social dimensions of ocean and coastal management decisions, but questions remain about how demographics and geographic residence affect perceptions of marine resources and management. We conducted and analyzed a public participation geographic information system (PPGIS) mapping survey of Oregon residents to capture uses and perceived values of coastal and marine areas. We measured coastal values, explored regional differences in those values, and identified a …

Data-Driven Mobility Strategies For Multimodal Transportation, Yao-Jan Wu, Xianfeng Terry Yang, Sirisha Kothuri, Abolfazl Karimpour, Qinzheng Wang, Jason Anderson

TREC Final Reports

Multimodal transportation systems (e.g., walking, cycling, automobile, public transit, etc.) are effective in increasing people’s travel flexibility, reducing congestion, and improving safety. Therefore, it is critical to understand what factors would affect people’s mode choices. With advanced technology, such as connected and automated vehicles, cities are now facing a transition from traditional urban planning to developing smart cities. To support multimodal transportation management, this study will serve as a bridge to connect speed management strategies of conventional corridors to connected vehicle corridors. This study consists of three main components. In the first component, the impact of speed management strategies along …

Mopping Up Or Turning Off The Tap? Environmental Injustice And The Ethics Of Plastic Pollution, Katharine A. Owens, Katie Conlon

Urban Studies and Planning Faculty Publications and Presentations

Opinion article

Decades of scientific research confirm that plastic pollution poses a threat to many species, to water resources, and to economies around the world (Laist, 1997; Barnes et al., 2009; Gregory, 2009; Teuten et al., 2009; Chen, 2015; Newman et al., 2015; Rochman, 2015). Experts demonstrate that oceanic plastic pollution is increasing at astounding rates (Eriksen et al., 2014; Geyer et al., 2017). Research indicates harmful levels of toxicity in everyday plastic items (SCP/RAC, 2020). Scientists find this issue so important that they have recommended plastics …

Using Deep Learning Algorithms To Give Bicyclists The “Green Wave” At Traffic Signals, Stephen Fickas

TREC Project Briefs

Led by Dr. Stephen Fickas of the University of Oregon (UO), transportation researchers are working to give bicyclists smoother rides by allowing them to communicate with traffic signals via a mobile app.

Teacher Preparation In The Shadow Of Loss: The Blurring Of Transacting, Transforming, And Transgressing, Anita L. Bright

Curriculum and Instruction Faculty Publications and Presentations

In this narrative, autoethnographic piece, the author contends with the constructs of transactional, transformational, and transgressive forms of educational engagement and teaching, all coming to the fore in a time of tremendous sorrow, loss, stress, and transition. Looking to critical scholars and their works for guidance, the author describes the path into and through a course with teacher candidates, taken on mid-term after the unexpected death of a close colleague.

Linear Nearest Neighbor Flocks With All Distinct Agents, R. G. Lyons, J. J. P. Veerman

Mathematics and Statistics Faculty Publications and Presentations

This paper analyzes the global dynamics of one-dimensional agent arrays with nearest neighbor linear couplings. The equations of motion are second-order linear ODE’s with constant coefficients. The novel part of this research is that the couplings are different for each distinct agent. We allow the forces to depend on the positions and velocity (damping terms) but the magnitudes of both the position and velocity couplings are different for each agent. We, also, do not assume that the forces are “Newtonian” (i.e. the force due to A on B equals the minus the force of B on A) as this assumption …

Does Experiencing Spousal Support And Strain Impact The Quality Of Family-Based Support That Supervisors Provide To Employees?, Joseph Alvin Sherwood

Dissertations and Theses

Relying on previously collected data from the Work, Family and Health Study (WFHS), and drawing from a sample of 75 supervisors working in the extended healthcare industry, this research investigation empirically tested propositions of the Work-Home Resources Model to explore antecedents of family-supportive supervisor behaviors (FSSB). To explore these relationships a longitudinal, multi-level structural equation model (MSEM) was used to examine how supervisor contextual resources (spousal support) and demands (spousal strain) in the home domain impacted employee perceptions of these supervisors' FSSB through gains in personal resources (psychological distress) across three time points. Results from the MSEM model confirmed one …

An "I" For An "I": A Systematic Review And Meta-Analysis Of Instigated And Reciprocal Incivility, Lauren S. Park, Larry R. Martinez

Psychology Faculty Publications and Presentations

Incivility and its negative impacts on individuals, teams, and organizations have been widely studied in workplace contexts, but the literature lacks a comprehensive understanding of incivility from the instigator's perspective. This meta-analysis of instigated incivility included 35,344 workers from 76 independent samples. Results showed that instigated incivility was related to several correlates including psychological ill-being, ρ = .36, and well-being, ρ = -.17; physical well-being, ρ = -.25; personal dispositions that are risk factors, ρ = .47, and preventative factors, ρ = -.34; negative, ρ = .28, and positive, ρ = -.33, job attitudes; positive team characteristics, ρ = -.28; …

"What Keeps Me Awake At Night": Assisted Living Administrator Responses To Covid-19., Jason Z. Kyler-Yano, Ozcan Tunalilar, Serena B. Hasworth, Jacklyn N. Kohon, Jaclyn M. Winfree, Riley A. Wilton, Aliza Tuttle, Paula C. Carder

Institute on Aging Publications

Assisted living (AL) constitutes an important sector of residential long-term care, yet there has been limited research about the impact of the coronavirus disease 2019 (COVID-19) pandemic in this setting. This qualitative study sought to understand the impact of the early stages of the pandemic (February-August 2020) from AL administrators' perspectives.

An Exploratory Study Of Adjunct Faculty Professional Growth Experiences, Bethany Ann Potts

Dissertations and Theses

Part-time non-tenure track faculty, also referred to as adjunct faculty, are the fastest growing instructional group in higher education, but they are provided minimal professional support from their employing institution(s). This lack of support is a problem because working conditions shape instructors' investment and efficacy of performance in their professional practice. Well established in the literature are inquiries into adjunct faculty working conditions that prioritize analysis of the organization over the lived experiences of the faculty. However, the lived experiences of adjunct faculty offer a unique and important lens from which to interrogate the impact of institutional policies and practices …

'There Are No Bathrooms Available!': How Older Adults Experiencing Houselessness Manage Their Daily Activities, Ellis Jourdan Hews

Dissertations and Theses

Older adults living unhoused encounter limitations and challenges that drastically decrease their wellbeing and quality of life. The purpose of my study was to understand how experiencing houselessness impacted older adults' ability to conduct their activities of daily living (ADLs) and instrumental activities of daily living (IADLs) within their communities. I conducted phone interviews with older adults aged 50 and older who experienced houselessness in the Portland metro area. The participants described the persons and places that shaped their community life when they were living unhoused, and they described how those entities intervened to alleviate barriers to daily activities. The …

Drug Conviction And Employment Restriction: Experiences Of Employees With Drug-Related Criminal Histories, Liana Bernard

Dissertations and Theses

It has been established that there are numerous barriers to obtaining and maintaining employment following a criminal conviction, including background checks, which occur as part of most selection processes. Barriers to obtaining and maintaining employment may be higher for individuals with drug-related criminal histories as they may face particularly severe negative stereotypes. This study examines the experiences of individuals with drug-related criminal histories' integration into the workplace and society. Additionally, because stereotypes about individuals with drug-related criminal histories are contradictory to those of individuals with stable employment, I examine how these individuals are impacted by reductions in the stigma that …

Anti-Muslim Bias: Investigating Individual Differences, Threat Perceptions, And Emotions In Islamophobic Policy Support, Aeleah M. Granger

Dissertations and Theses

Following the terrorist attacks of 9/11, Muslims in the United States were victims of increased surveillance by law enforcement on the basis of their religious identity, often resulting in mistreatment and unjustified imprisonment. These biases against Muslims and subsequent policy shifts have been pervasive and have had negative impacts on the growing number of Muslims in the United States. The current study focuses on individual differences that predict Islamophobia, including Social Dominance Orientation (SDO), Right-wing Authoritarianism (RWA), and Nationalism, as well as the specific types of intergroup threat perceptions (i.e., realistic, symbolic, terroristic) and subsequent emotional reactions (e.g., anger, fear) …

Computer Adaptive Testing For The Assessment Of Anomia Severity, Gerasimos Fergadiotis, Marianne Casilio, William D. Hula, Alexander Swiderski

Speech and Hearing Sciences Faculty Publications and Presentations

Anomia assessment is a fundamental component of clinical practice and research inquiries involving individuals with aphasia, and confrontation naming tasks are among the most commonly used tools for quantifying anomia severity. While currently available confrontation naming tests possess many ideal properties, they are ultimately limited by the overarching psychometric framework they were developed within. Here, we discuss the challenges inherent to confrontation naming tests and present a modern alternative to test development called item response theory (IRT). Key concepts of IRT approaches are reviewed in relation to their relevance to aphasiology, highlighting the ability of IRT to create flexible and …

Temperature-Induced Activation Of The Reproductive Axis Through Melatonin-Mediated Changes In Thyrotropin, Treven J. Winters

Dissertations and Theses

An animal's ability to synchronize life-history events or stages with optimal environmental conditions is paramount to successfully reproducing and maximizing fitness. Additional events including migration, foraging, rearing of young, and emergence from hibernation are all examples of processes under environmental control in one species or another. An exciting new mechanism involving neural thyroid hormone metabolism has been elucidated that links environmental control to the neuroendocrine reproductive axis. In birds and mammals with seasonal breeding cycles, this neuroendocrine pathway is activated by photoperiod-induced changes in thyroid stimulating hormone (TSH, also known as thyrotropin) production within the pars tuberalis region of the …

Women's Work: A Feminist Standpoint Theory Study Of Scholarship, Voice, And Resistance In The Academic Generation Of Knowledge, Linnea Angelica Spitzer

Dissertations and Theses

More women than ever are earning doctoral degrees and are taking research or teaching positions at universities. However, the number of tenured women in full professorships have not yet achieved parity with the number of men in similar positions. Of the many reasons proposed for the disproportionate representation of women in the higher ranks of academia, one of the most commonly cited is the lower rates of publication by women in scholarly journals, an important criterion for promotion and tenure. However, women faculty are not unproductive. As scholars, they produce research and publish their findings in mainstream academic journals. In …

Simulation Of Light Propagation Captured By Photoemission Electron Microscopy (Peem), Nabila Islam

Dissertations and Theses

The Photoemission electron microscopes (PEEM) is a powerful tool capable of synchronously imaging wave nature of light manifested by interference patterns as well as its particle nature through the energy exchange between the incident photons and the photoemitted imaging electrons. PEEM offers a non-invasive high-resolution approach for studying light propagation and interaction phenomena within a nanophotonic waveguide [7,8]. The electric field intensity variation of the interference pattern yielded by the interaction between the incident light and the guided mode coupled into the waveguide produces varying photoemission yields creating contrast in PEEM image. The guided modes cannot be excited simply by …

Ancillary Data For Refining Computer Adaptive Algorithms For The Assessment Of Anomia, Emily Kathryn Tudorache

Dissertations and Theses

Computer adaptive testing formats, based in item response theory (IRT), are becoming an increasingly popular approach to testing in healthcare because they offer numerous psychometric and practical advantages to assessment when compared to static tests that rely on classical test theory. Fergadiotis and colleagues (2015) have developed computer adaptive versions of the Philadelphia Naming Test (PNT) short-forms, which have demonstrated acceptable precision and standard error of measurement when compared to the static short-forms and original full-length assessment. This study sought to use synthetic data simulations using the catIrt R package (Nydik, 2014) to investigate possible advantages of the use of …