Digital Commons Network^™

To Disclose Or Not To Disclose? Self-Disclosure Of Mental Health In The Workplace, Samantha Margaret Reynolds

Dissertations and Theses

When making the decision to disclose a mental illness, individuals may be met with a number of factors that impact disclosure. This study examines the relationship between self-stigma, psychological safety, social support and self-disclosure of mental illness in the workplace. The present study surveyed 756 participants and found a positive relationship between stigma and self-disclosure as well as a positive relationship between social support and self-disclosure. For work outcomes, there was a negative relationship between both job satisfaction and productivity in relation to self-disclosure. This study potentiates the antecedents and consequences of self-disclosure of mental illness and how it impacts …

: Examining How Factors Associated With Patients, Physicians, Hospitals, And Surrounding Communities Affect Primary And Repeat Cesarean Delivery Through A Social-Ecological Lens, Christina Ventura-Dipersia

Dissertations and Theses

Background: Childbirth is one of the most common reasons for hospitalization in the U.S., and Cesarean delivery (i.e., surgical childbirth) is costlier and has a higher likelihood of birth-related complications, maternal rehospitalization, and postpartum medical care utilization than vaginal delivery. The rate of Cesarean delivery in the United States (U.S.) has increased in recent years by over 60%, from 20.7% of all births in 1996 to 32.9% of all births in 2011. As Although this increasing trend of Cesarean delivery incidence has also been seen in other countries, the rate of Cesarean delivery has been rising more steadily within …

Student Sustainability Leadership Development At Portland State University: Developing Holistic Sustainability Leaders, Megan Suzanne Schneider

Dissertations and Theses

In order to address the myriad of social, economic, and environmental challenges the world is facing, we need to be able to engage in leadership that fosters collective action towards sustainable solutions. Higher education is an institution that can equip people with the abilities to engage in sustainability leadership. This master's thesis research explores how students develop sustainability leadership through their college experience. Nine students, who had been identified as sustainability leaders through their participation in the Student Sustainability Center (SSC), a co-curricular sustainability program at Portland State University, were selected to be part of this grounded theory research project. …

The Combined Effects Of Parent And Teacher Involvement On The Development Of Adolescents' Academic Engagement, Nicolette Paige Rickert

Dissertations and Theses

The current dissertation includes two related studies designed to examine the combined effects of parent and teacher involvement on the development of adolescents' academic engagement as they transition to middle school. Previous studies have demonstrated the positive, individual effects of parent and teacher warm involvement on adolescents' engagement in school. However, this research is limited in its focus on only one social partner. Adolescent development is embedded within multiple, dynamic systems, necessitating the examination of both parent and teacher influences. The few studies that have examined parents and teachers together suggest that their combined effects are both cumulative (additive) and …

Ethnonational Identity And Detached Lives In A Serbian Province: A Study Of Parallelism Among Vojvodina's Hungarian Community, Uros Prokic

Dissertations and Theses

Current theories of interethnic relations generally posit assimilation, integration and marginalization as possible outcomes between minority and dominant groups in Eastern Europe. However, there may be cases that are not adequately described by any of these existing interethnic relations paradigms. This dissertation explores one alternative, dubbed parallelism, which can be described as institutionally-driven self-isolation and detachment leading to communities living side by side on parallel trajectories and not interacting. Using the Hungarian ethnonational minority community in Serbia's autonomous northern province of Vojvodina as a case study, the author examines the institutional factors that have led to parallelism. Primary data from …

Statistical Analysis Of Social Network Change, Teresa Danielle Schmidt

Dissertations and Theses

This project explores two statistical methods that infer social network structures and statistically test those structures for change over time: regression-based differential network analysis (R-DNA) and information theory-based differential analysis (I-DNA). R-DNA is adapted from bioinformatics and I-DNA employs reconstructability analysis.

This project applies both R-DNA and I-DNA to analyze Medicaid claims data from one-year periods before (May 2011- Apr 2012) and after (Jan 2013-Dec 2013) the formation of the Health Share of Oregon Coordinated Care Organization (CCO). The formation of CCOs was legislated by the state of Oregon in 2012 with the triple aim of improving health outcomes, reducing …

Systems Isomorphisms In Stochastic Dynamic Systems, Rajesh Venkatachalapathy

Dissertations and Theses

The identification of isomorphisms between disparate systems is an important focus of systems science. Such isomorphisms have not only conceptual and pedagogical value to systems science, but they also provide pragmatic value to specific disciplines by suggesting new ways to model familiar phenomena and by serving as reference models that show how even simple models can generate complex behavior. Specifically, this dissertation looks at certain classes of stochastic dynamic systems (SDS) and shows that similar equations can model phenomena in sociology and psychology. In both disciplines, what is modeled by these SDS isomorphisms is a certain type of reliability, defined …

A Mixed Methods Analysis Of Corpus Data From Reddit Discussions Of "Gay Voice", Sara Elizabeth Mulliner

Dissertations and Theses

In the last decade, there have been a number of public discussions about "gay voice" and "sounding gay." These two phrases often serve as a shorthand for the belief that a listener can determine the sexuality of a speaker based on phonetic qualities found in a speaker's vocal output. However, these expressions are more accurately described as "catch-all" terms for speech that may contain features associated with non-gender conforming stances and personae. Notions about gender and sexuality could be intertwined in complicated ways in this language ideology. Investigating popular discussions of gay-sounding voices could provide information on what people are …

Flood Dynamics In The Portland Metropolitan Area, Past, Present, And Future, Lumas Terence Helaire

Dissertations and Theses

The Portland area has an extensive flood history since it was founded in 1845. In the late 19th century, the Portland area was prone to flooding from snowmelt freshets (3-6 months duration) and brief winter rain or rain-on-snow events. Since that time the magnitude of spring freshets has been curtailed by 45% due to climate change, flow diversions, and reservoir management. Along with changes in hydrology, the bathymetry of the Lower Columbia River has been altered by the dredging of the navigation channel, diking, and land reclamation. To understand how these changes in hydrology and bathymetry have affected tidal and …

Acceptability Of A Vaginal Ring To Prevent Hiv And Pregnancy: Integrating Multiple Qualitative Methods, Dana Watnick

Dissertations and Theses

Heterosexual vaginal sex can simultaneously put women at risk for unintended pregnancy and sexually transmitted infections, such as HIV, disproportionately impacting poor women around the world. Both unintended pregnancy and HIV are persistent public health concerns associated with negative outcomes for mothers, families and communities. The current mix of prevention tools available to women to protect against unintended pregnancy and HIV is limited. Multipurpose Prevention Technologies (MPTs) are innovative products that simultaneously offer protection against pregnancy and HIV. However, MPTs will only be effective in reducing unintended pregnancy and incident HIV if women are willing to use them. With an …

An Application Of Deep Learning Models To Automate Food Waste Classification, Alejandro Zachary Espinoza

Dissertations and Theses

Food wastage is a problem that affects all demographics and regions of the world. Each year, approximately one-third of food produced for human consumption is thrown away. In an effort to track and reduce food waste in the commercial sector, some companies utilize third party devices which collect data to analyze individual contributions to the global problem. These devices track the type of food wasted (such as vegetables, fruit, boneless chicken, pasta) along with the weight. Some devices also allow the user to leave the food in a kitchen container while it is weighed, so the container weight must also …

The Optimized Synthesis Of Copper Nanowire For High-Quality And Fabrication Of Core-Shell Nanowire, Suhyun Lee

Dissertations and Theses

Flexible electronics are the promising technology for prospective application in foldable phones. Currently, indium tin oxide (ITO) has been widely used for electronic devices including flat-panel display. However, it is brittle and expensive. Metal nanowires are considered as alternative materials. Among various metal nanowires, copper nanowires are attractive because of its high electrical conductivity, better flexibility, and low cost compared with ITO. However, copper nanowires are very prone to oxidize, which causes subsequent degradation of electrical conductivity. Due to this oxidation issue, core-shell structure nanowires, which are formed silver shell having high conductivity and low resistivity on the surfaces of …

A 30-Year Climatology Of Meteorological Conditions Associated With Lightning Days In The Western United States, Dmitri Alexander Kalashnikov

Dissertations and Theses

A 30-year climatology of lightning and associated synoptic meteorological patterns are characterized across the Western United States (WUS), utilizing a comprehensive composite analysis. Results generally show a preferred synoptic meteorological setup with positive 500-hPa geopotential height anomalies to the northeast of the location experiencing a lightning day, and negative sea level pressure anomalies co-located and to the northwest. Variation in preferred anomaly patterns across the western US reflects the divide between those areas affected by the North American monsoon system and areas outside the monsoonal core. Locations in the western Great Basin and northern Rocky Mountains, which are outside the …

Explaining The Sectarian Violence In The Middle East: A Conflict Analysis Of The Case Study Of Saudi Arabia And Iran, Ahmed Elsayed Eltally

Dissertations and Theses

The Middle East has been rife with conflicts, extremism, and sectarianism in recent decades. Many explanations attribute the rise of sectarianism in the Middle East to the historical divide between Sunni and Shia Muslims, while others attribute it to power or identity concerns. This thesis explores the factors that contributed to the rise of contemporary sectarianism in the Middle East through the case study of Saudi-Iranian rivalry. Drawing on the literature on the history of the Middle East, Islam, theories of international relations, and conflict studies, it underlines how Saudi Arabia and Iran use sectarianism to further their interests. This …

Hf Iq Mixer Vfo Temperature Compensation And Drive Level Optimization For Opposite Sideband Suppression, Katlin Anne-Rostomyan Dahn

Dissertations and Theses

An amateur radio 40m band temperature compensated variable frequency oscillator (VFO) with drive-level optimized for opposite sideband suppression for use as the local oscillator (LO) of a high frequency (HF) IQ image reject mixer is considered in this work. The first problem of this thesis was the discovery of the HF IQ mixer's opposite sideband suppression dependence on LO drive-level. As a solution to this problem, the author built a fixed drive-level VFO for the optimal opposite sideband suppression. This then led to the second problem of this thesis; the discovery by this author of the well-known problem of VFO …

"An Idolatry Of Sound" : Nature, The Natural, And The Castrato's Body In The Eighteenth Century, Caitlin Elizabeth Pala

Dissertations and Theses

The castrati--Italian men castrated before puberty in order to retain their high singing voice--were Europe's first superstars, reaching the height of their popularity in the first few decades of the eighteenth century. While only a tiny percentage of the European population, the castrati embodied many of the significant medical and philosophical questions of the Enlightenment that aimed to understand humanity: human emotion, physiology, sexuality, and culture. As a part of the ongoing debate over what was "natural," the castrati hold an interesting place. At the broadest level, the very existence of the castrati asked what it was to be a …

Passive Separation Of Binary Fluid Mixtures In Microchannels Using Lattice Boltzmann Method, Mohanad Kamil Radhi

Dissertations and Theses

Fluid mixtures in real life exist in two forms: miscible and immiscible. Separation of these mixtures using chemical agents or thermal energy has both environmental and economic disadvantages. The high cost and the environmental damage caused by the traditional separation techniques have stimulated both academia and industry to seek alternatives. The emergence of microfluidics offers robust solutions for a broad span of transport problems due to the high surface to volume ratio and reduced length scales. Particularly, the separation efficiency increases significantly due to the aforementioned feature. However, there is still a pressing need of passive separations for the sake …

Analysis Of E-Cigarette Liquids And Aerosols By Nmr Spectroscopy: Compositions, Boiling Points, And Degradation Profiles, Anna Katherine Duell

Dissertations and Theses

Electronic cigarettes (e-cigarettes) are an increasingly popular tobacco product used by ~3% of adults and 21% of 12th grade students (as reported for the prior 30-days in surveys) in the United States in 2018. As of 2019, this number went up to ~25% for 12th grade students. Due to how quickly e-cigarettes gained popularity and the rapid design changes that have ensued, there has not been enough time to accurately assess the effects of e-cigarettes, particularly for long-term use. The liquids used in e-cigarettes (e-liquids) can degrade when vaped in an e-cigarette, so understanding the variables that can modulate degradation …

Local Radiance, Scott Peter Britell

Dissertations and Theses

Recent years have seen a proliferation of web applications based on content management systems (CMS). Using a CMS, non-technical content authors are able to define custom content types to support their needs. These content type names and the attribute names in each content type are typically domain-specific and meaningful to the content authors. The ability of a CMS to support a multitude of content types allows for endless creation and customization but also leads to a large amount of heterogeneity within a single application. While this meaningful heterogeneity is beneficial, it introduces the problem of how to write reusable functionality …

Bone Mineral Density Of The Common Bottlenose Dolphin, Tursiops Truncatus: A Proposed Model For Monitoring Osteological And Ecosystem Health, James Wright Burrus Powell

Dissertations and Theses

Bone mineral density (BMD) in the pectoral flipper of the common bottlenose dolphin, Tursiops truncatus, was examined to address the need to define a comprehensive target site for clinical osteodensitometric assessment and to establish ranges of observed bone density values for this species. Radii were analyzed using dual energy X-ray absorptiometry (DXA), the accepted standard in human medical studies. Multiple loci within the radius were identified and assessed for their correlation to BMD of the entire bone. Radii BMD were also examined for differences based on sex, age, total body length, handedness, geographical affinity, and nutritional status at time …

The Process Of Establishing Theoretically Grounded Measures Of Science And Chemistry Identity For Use In Undergraduate Chemistry Courses, Kathryn Nicole Hosbein

Dissertations and Theses

Identity has been theorized to aid in student persistence toward science, engineering, technology, and math (STEM) degrees. However, before we can explore the impacts of learning environments on identity, and subsequently persistence, robust measures that can aid in understanding how identity is fostered need to be available. This research study aims to create measures of identity by expanding an existing physics identity framework and contextualizing it to science and chemistry identities. Development of the measures was carried out through two distinct phases that provided evidence for reliability and multiple aspects of validity.

The first phase of the study used qualitative …

Optimizing On-Street Parking Supply With Analytical Models, Chawalit Tipagornwong

Dissertations and Theses

Commercial vehicles are crucial for the urban economy, but they generate negative impacts as well. This leads to restrictions such as a reduction in the number of loading zones. The result is that commercial drivers spend a significant amount of time searching for available loading zones. To avoid searching for parking, some commercial drivers double park, which causes traffic congestion. Therefore, the number of loading zones should be set properly. Since a curb is allocated between both loading zones and parking spaces, both parking types have to be considered. Many on-street parking management strategies have been implemented, including pricing meter …

Student Voice In A Participatory Design Process Focused On Developing Equity-Based Stem Teaching Practices, Frank Heimerdinger

Dissertations and Theses

The purpose of this study with second grade students in a mid-sized city in the Northwest was to examine an equity-based STEM teaching practice and design process that builds on student's voice in the context of an elementary school. Teaching practice innovations were designed using a participatory process drawing on student voice and experience, culturally responsive pedagogy, STEM content, and teaching practices. The students collaborated with the teacher to design and enact equity-based STEM teaching practice innovations and gave necessary and appropriate feedback regarding its efficacy in creating equitable and empowering learning experiences from their own perspective. A specific goal …

Recruitment Marketing: How Do Wellness And Work-Life Benefits Influence Employer Image Perceptions, Organizational Attraction, And Job Pursuit Intentions?, Amy Christine Pytlovany

Dissertations and Theses

A global talent shortage is motivating employers to change the way they approach recruitment. To stay competitive, business leaders are strategizing new ways to attract employees and market their organizations to prospective employees. This research examined the impact of work-life and wellness programs on employer image perceptions (instrumental, symbolic, and experiential) and recruitment outcomes (organizational attraction and job pursuit intentions). It integrated these literatures to inform evidence-based organizational decision-making.

Study materials were developed with pilot testing conducted using Amazon Mechanical Turk (MTurk). Pilot 1 (N = 40) assessed the value of 32 types of benefits across traditional (e.g., health …

Assessing The Efficacy Of Virtual Experiments In The General Chemistry Laboratory, Cory Jerome Hensen

Dissertations and Theses

As more students enroll in chemistry courses, institutions are faced with increasing costs and limited laboratory space to keep up with the demand. One solution some institutions have turned to is the incorporation of virtual experiments into the curriculum, as this can lower costs and increase the availability of laboratory space. Some institutions have offered sections that complete all of their experiments in a virtual environment, others have offered sections that alternate between a traditional hands-on experiment and a virtual experiment, and some institutions have replaced only select experiments throughout the curriculum with a virtual experiment. To begin to be …

Support From Inside Out: Exploring Whether Various Social Supports Assist In Reducing Prison Rule Violations, Sarah Renee Lazzari

Dissertations and Theses

Scholars argue that prison rule violations are a way to assess whether individuals are engaging in prosocial behaviors. Individuals who engage in prosocial behaviors, during periods of incarceration, are less likely to engage in behaviors that result in official rule violations. Decreasing rule violations is one way to work towards a safer prison environment, while also preparing individuals for release. The current study uses cross-sectional data form the 2004 Survey of Inmates in State and Federal Facilities, in order to examine whether multiple types of prisons programs, which will be framed as various types of social supports, influence the frequency …

Attrition And Psychotherapy, Jesse Barrington Homan

Dissertations and Theses

Attrition in psychotherapy, also known as dropout, is a problem that affects clients who terminate, their families, therapists, mental health systems, and the overall community. Research on attrition is vast. However, the majority of this research has been done post hoc, relied on quantitative methods, and looked primarily at client demographic variables as the predictors of attrition. This has resulted in inconsistent findings, offers little to no useful information about attrition, and appears to blame clients for failed therapy. There has been little research on attrition from the perspective of clients who terminate. This study was designed to answer the …

What Happened To This Child? Identifying Factors That Influence The Identification And Categorization Of Child Maltreatment In The United States, Erika Tullberg

Dissertations and Theses

Background: Research has shown that adverse childhood experiences are strongly linked with health outcomes over the life course, and that child maltreatment – generally defined as physical abuse, sexual abuse, emotional maltreatment and neglect – can have an immediate, negative impact on child health and development and a longer-term impact on adolescent and adult health, including the leading causes of morbidity and mortality in the U.S. With such significant consequences, the accurate identification of child maltreatment is critical.

Child welfare caseworkers are charged with protecting the safety and fostering the well-being of children who have been identified as maltreated or …

Investigating The Origins Of Toxins Present In Electronic Cigarette Aerosols, Shawna Vreeke

Dissertations and Theses

The purported safety of electronic cigarettes has come under scrutiny with the significant increase of lung related illnesses starting in the summer of 2019. Public view has started to shift towards understanding the potential negative health impact associated with these devices. While many investigations indicate probable hazards present in e-cigarette aerosols, inter-laboratory assessments are wide ranging and can be contradictory. Due to the novelty of this field, relatively little is known about these products. In this work, the identification and quantification of inhalation toxicants such as formaldehyde, acrolein, acetaldehyde and dihydroxyacetone are reported. Results of the investigation of the ability …

Experiences Of Early Childhood Educators Working With Teaching Strategies Gold®: A Narrative Inquiry, Sarah Kathryn Guyon

Dissertations and Theses

Research regarding the effects of positive early childhood experiences on long term learning and success is drawing more attention to early childhood education programs than ever before. Promises on the federal and state level of better pay for early childhood educators and "high quality" publicly funded early childhood education programs is an exciting and long-awaited vision by both families and early childhood educators. However, with federal and state funding comes the need for justification of those funds through different measurement structures. One of the widely used measurement structures is the Teaching Strategies GOLD® preformatted, portfolio style assessment system. Teaching Strategies …