Digital Commons Network^™

Phosphorescent Carbon Dots Doped Silica Nanomaterials Via Microwave-Assisted And Modified Stöber Methods For Anti-Counterfeiting And Biosensing, Weichao Liu

Dissertations and Theses

Phosphorescent materials are essential in bioimaging, anti-counterfeiting, and other applications due to their prolonged light emission. However, current phosphorescent materials face challenges such as complex synthesis, high costs, and instability. Carbon dots (CDs), with size less than 10 nm, are a promising alternative due to their biocompatibility, tunable optical properties, and simple synthesis. This thesis explores the synthesis of CDs using ethylenediamine (EDA) and phosphoric acid via a microwave-assisted method, followed by silica encapsulation using a modified Stöber process to form CDs@SiO2, aiming to enhance their stability and optical properties. Optical characterization showed a slight blue shift in the excitation …

Pain Anxiety And Pain Interference As Mediating Factors In The Relation Of Childhood Trauma And Fear Of Cancer Recurrence, Jennifer Kuo

Dissertations and Theses

Fear of cancer recurrence (FCR), which is broadly defined as “the fear that cancer could return or progress in the same place or in another part of the body” (Vickberg, 2003), is often identified as an unmet need among cancer survivors, with rates ranging from 20-79% (Simard et al., 2013). Pain, another symptom commonly endorsed in cancer survivorship, is positively associated with fear of cancer recurrence (Janz et al., 2011; van den Beuken-van Everdingen et al., 2008). The Cancer Threat Interpretation Model suggests that cognitive biases exist in interpreting threat appraisal and pain coping by increasing the saliency of pain …

Recovering Relativistic Effects In Electronic Structure Calculations Of F-Element Single Molecule Magnets, Nathan Roy Loutsch

Dissertations and Theses

There has been a great interest in developing new information technologies. Single molecule magnets (SMMs) are emerging as materials for high density data storage, qubits, and molecular spintronics. SMMs containing lanthanide or actinide centers are of interest due to their potentially high magnetic anisotropy. This would enable the use of SMMs at higher temperatures. Accurately modelling the electronic structure of f-element complexes can be quite challenging. Density Functional Theory (DFT) is a popular choice for optimizing geometry and studying the electronic structure due to its relatively low cost. In certain cases, more accuracy is desired or necessary to predict experimental …

An Examination Of The Degree To Which The Bia Models Representative Bureaucracy In Selected Lakota Communities, Melissa Eagle Bear

Dissertations and Theses

This dissertation focuses on representative bureaucracy as it applies to the administration of the Bureau of Indian Affairs (BIA) and experienced by Lakota people within two Indian reservation communities. There is limited research on the theory and practice of representative bureaucracy within the context of BIA services. This qualitative study rests on the assumption that representative bureaucracy would lead to positive policy outcomes for Indian people. This research focuses on three specific areas of representative bureaucracy: passive, symbolic, and active representation. This phenomenological research takes as given the centrality of a Lakota epistemology: the beliefs, values and practices embodied in …

Fluorinated Thiophene Containing Aromatics And Their Polymers For Energy Storage And Semiconductor Applications, Blessing Damilola Ishola

Dissertations and Theses

The development of new fluorinated functional materials that are moisture and air-stable is crucial for the efficient production of n-type organic semiconductors. These semiconductors are integral components in electronic devices such as transistors, diodes, organic semiconductors, organic field-effect transistors, and organic light-emitting diodes. Organic materials have become increasingly popular for designing new semiconductors due to their flexibility compared to inorganic alternatives. By molecularly engineering the band gap and electron delocalization, we can improve the efficiency and performance of semiconductor devices. We design, synthesize, and characterize a new type of donor-acceptor molecule based on the structure-property relationship learned from the literature …

Online Perceived Social Support And Its Association With Psychopathology In Rural And Urban Youth, Ellen Alexandra Knowles

Dissertations and Theses

Social support is a fundamental aspect of development throughout adolescence. It has been found to buffer against the negative impacts of stress and provide general benefits to one’s well-being. Youth today are exposed to a range of opportunities for socialization with peers, both in-person and online, including interacting with others through texting, social media, video games, and other digital means. These online interactions have begun to be investigated as accessible methods through which adolescents can connect with others and maintain healthy relationships. Furthermore, digital social networks may be most critical for youth from isolated communities, including those from rural areas. …

Implementation Of Formative Feedback Practices Via An Instructional Walkthrough Observation Tool: The Impact On Pre-Service Teacher Knowledge And Skills, Sheila Mulder

Dissertations and Theses

The collection of studies explores the role of feedback in the development of pre-service teachers’ knowledge and skills, focusing on the perspectives of university supervisors and cooperating teachers. The first study used a comparative case study examining pre-service teachers’ perceptions of the feedback they received and their ideal feedback across two universities. This revealed insights into effective feedback practices, informing teacher educator’s feedback practices, underscoring recommended feedback structures within teacher preparation programs. Moreover, there is a need for training in formative feedback practices to create a common understanding of the desired teaching practices, formative feedback practices to support collaborative feedback …

Mental Health In College Students: Efficacy Of A Telehealth-Delivered Occupational Therapy Program, Amy Marie Nelson

Dissertations and Theses

The number of college students in the United States struggling with mental health issues has increased tremendously over the past decade. Specifically, undergraduate students report stress and anxiety as significant inhibitors to academic performance. Colleges are investing resources to combat this problem, but increased counseling services are insufficient. Novel approaches beyond traditional college counseling services are recommended. Occupational therapy, not traditionally offered on most college campuses, may be one solution. A few occupational therapy programs exist on college campuses, but there is limited evidence of their efficacy, and most lack solid theoretical underpinnings. More evidence is needed on the effectiveness …

Childhood Maltreatment And Posttraumatic Stress Symptom Clusters: The Mediating Role Of Early Maladaptive Schemas, Sydney Nichole Stamatovich

Dissertations and Theses

The current study tested a structural equation model to examine the associations between types of childhood maltreatment (i.e., neglect, punishment, and sexual abuse), Jeffrey Young’s early maladaptive schemas (EMSs), and posttraumatic stress disorder (PTSD) symptom clusters (i.e., avoidance, hyperarousal, intrusion, and negative alterations in cognitions and mood) in a sample of college students. Childhood maltreatment is a pervasive problem in the United States of America and has several short- and long-term physical and psychological consequences. Of note, victims of childhood maltreatment are at an elevated risk of developing PTSD. Further, childhood maltreatment and PTSD are associated with negative alterations in …

Near Infrared Upconversion Nanoparticles Modified With Semiconducting Polymers For Anti-Counterfeiting, Abraham Chibuikem Ikeji

Dissertations and Theses

Lanthanide doped up-conversion nanoparticles (UCNPs) are excellent luminescent materials due to their ability to perform photon up-conversion from low energy to high energy using their triplet energy metastable states and because of their long-lived excited state. These properties enable multiple applications with the near infrared upconversion emission. They have been incorporated in developing technologies to help curb counterfeiting activities and other areas of research. However, they still have some limitations such as the hydrophobic nature of the UCNPs, and the absence of functional groups that can also help impact other desired features. Thus, in this work we have coated up-conversion …

Crisis Intervention Model Effectiveness In South Dakota City And Rural Schools, Nicole Ann Bechen

Dissertations and Theses

Little information is known on crisis prevention and intervention plans in schools across South Dakota. A review of the existent literature revealed gaps within school-based crisis intervention models, their objectives, and their effectiveness in addressing the psychological and physical safety needs of students, staff, teachers, families, and community members. Gaps in understanding rural crisis response were noted. The purpose of this study was to assess whether crisis prevention and intervention plans in South Dakota schools adequately protected students, staff, families, and community members. To achieve this, a stratified random sample of 53 PreK-12 public schools in the state of South …

Designing Fluorescent Moscs For Potential Applications In Illicit Drugs Detection, Robyn Nicole Cook

Dissertations and Theses

Illicit and hazardous substances pose a serious effect on the human body which can create longer-term issues on the mental and physical health which potentially lead to fatalities. Current methods for detecting illicit substances include analytical techniques like mass spectrometry (MS) and gas/liquid chromatography (GC/LC) which are known for accuracy and sensitivity. However, these instruments are bulky, costly, time-consuming, and require highly trained personnel. An alternative approach to overcoming these limitations is to employ nanostructured molecule-based chemical sensing technologies that are user-friendly, portable, and cost-effective with the sensitivity for detecting illicit substances. One such candidate is metal-organic super-containers (MOSCs), which …

The Contested Exempla Of Lucius Cornelius Sulla, Victoria Theresa White

Dissertations and Theses

In 82 BCE, Lucius Cornelius Sulla emerged the victor of his civil war against the supporters of Marius and Cinna. The brutal aftermath of this victory, characterized by the creation of the proscriptions, would brand Sulla as a cruel and immoderate victor. Still, his successes in Rome’s previous wars against foreign enemies had enshrined Sulla as a brilliant military commander within Roman memory. Previous scholarship about Sulla has focused on the dichotomy of Sulla’s actions, often in order to evaluate his clemency or cruelty and his aims of his political reforms. This thesis analyzes how ancient Roman and Greek authors …

Perceived Neuroscience Knowledge And Counselor Self-Efficacy, Cristina Buus

Dissertations and Theses

There has been an increase in neuroscience research within the counseling field which has then been integrated into counseling practice. There is limited research, however, that investigates how this neuroscience information impacts counselors directly. This study investigated the association between counselor self-efficacy and perceived neuroscience knowledge. This study also sought to understand what factors were predictive of perceived neuroscience knowledge (gender, age, licensure tier, years of experience, CACREP-status, and perceived benefit of neuroscience knowledge). To answer the research questions, a multiple regression design was utilized to identify any factors that were predictive of perceived neuroscience knowledge. Additionally, a correlation was …

Hytplankton And Chlorophyll Dynamics Across Various Aquatic System Types In The Middle Missouri Rivber Basin, Ryan Alan Dunbeck

Dissertations and Theses

Much like the response to naturally occurring physical, chemical, and biological variables controlling phytoplankton dynamics, anthropogenic modification to those variables may have profound implications on phytoplankton density and community structure in aquatic systems. We theorized that extensive land use and river channel modifications would result in (1) an increase in basin-wide phytoplankton density in the Middle Missouri River Basin (MMRB), and (2) a shift in community structure within and downstream of reservoirs filled after 1950 by examining data collected from 2020 and 2021 across the Middle Missouri River Basin to data collected in 1950. Our results suggest that system-wide increases …

American Institution Of Public, K-12 Education: An Institutional Field Under A Complexity Paradigm, Jennifer Jean Joyalle

Dissertations and Theses

Institutional fields serve as foundational bedrocks that shape and govern behaviors, norms, and practices within distinct domains of societal and organizational interactions. The emergence of machine learning and the ability to manipulate large datasets offer researchers and decision makers the potential ability to model and visualize the behavior associated with institutional fields.

This proof of concept provides an example of visualizing the changing conditions in the institutional field of public K-12 education in America as a topology. By interweaving three primary strands of theory -- institutional fields, complexity in the guise of complex adaptive systems as a paradigm, and paradigms …

A Qualitative Exploration Of The Lived Experiences Of Graduate Students With Histories Of Mental Health Diagnoses Navigating Clinical Psychology Doctoral Programs, Hannah Flanery

Dissertations and Theses

In general, graduate students experience unhealthy stress levels throughout their graduate careers. Clinical psychology doctoral students experience additional stressors related to intensive training in providing psychological-related services to clients. There is a gap in the literature in understanding how clinical psychology doctoral students with a personal history of mental health effectively navigate highly stressful graduate programs. This dissertation explored the experiences of clinical psychology Ph.D. students who 1) have a history of mental health diagnoses and 2) experience current psychological distress as they manage educational/training demands and administer psychological interventions to clients. A phenomenological qualitative approach was utilized to fully …

"Suited To The Wants Of The Country": Historical Ceramics From The Fort Vancouver Sutler's Store, Vancouver, Washington, Kaitlyn Nicole Hosken

Dissertations and Theses

For much of the early 19th century, the British Hudson's Bay Company (HBC) dominated commercial activity throughout the Pacific Northwest. Following development of the Oregon Trail in the 1840s and 1850s, however, the HBC saw increasing social and economic competition from American settlers. This research examines nationalist attitudes evident during the transition to the American colonial era and effects on the consumption of commercial goods. Analyses compare archaeological ceramics from two retail sites located in what is now Vancouver, Washington: an 1850s American sutler's store and the HBC Sale Shop. Additional comparison is made with a contemporaneous U.S. Army Officers' …

The Experiences Of Black Women Direct Care Workers In Long-Term Care, Nakeshia Knight-Coyle

Dissertations and Theses

This study expands understanding about the experiences of Black women direct care workers (DCWs) experiences with racism, discrimination, and economic exploitation in the long-term care (LTC) sector. It comes at a critical time when COVID-19 has demonstrated the important and essential nature of long-term care work. COVID-19 has also elucidated the challenges of an insufficient workforce and its detrimental impact on the long-term care system’s ability to meet the care needs of those accessing long-term care services. Finally, workforce needs are projected to increase with the impending influx of baby boomers into retirement, making this study a timely effort at …

Examining Policy Innovation Process And The Roles Of Policy Entrepreneurs: A Case Of Smart City Initiative In Khon Kaen, Thailand, Thitisak Duadsuntia

Dissertations and Theses

Innovation is a necessary process for public sector organizations and governments to adapt to social and economic changes. Innovation helps governments improve public service performance and address wicked challenges. Although the significance of public sector innovation has long been realized, how it occurs, and how it is influenced by contextual factors is not well explored. Particularly, policy innovation that emerges in an open and dynamic social system is understudied. Policy entrepreneurs mobilize policy change in their social systems, but their roles in a public sector innovation process still needs further investigation.

This study explores the policy innovation process and explicates …

How Are Oregon's Rural Indigenous Communities Overcoming Water Access Issues?, Tyren John Thompson

Dissertations and Theses

This study investigates how water insecurity affects Indigenous communities in Grand Ronde, Warm Springs, and Umatilla, Oregon, through loss of clean drinking water, access to culturally significant foods, and exposure to pollution. Each community offers innovative solutions drawing on their Indigenous knowledge to overcome water supply challenges. Communities with more resources are better equipped to cope with water insecurity and environmental degradation.

Assessment Of The Omni-Channel Adoption For The Management Of Emergence Technologies In Food Retailing During And After The Era Of Covid-19, Esraa Bukhari

Dissertations and Theses

Using E-commerce has become crucial for retailers, specifically in the food business; the Food industry is one of the essential drivers of economies in the world. In and after the era of COVID-19, as technology advances, there is a need to apply an omnichannel strategy. In response, this research aims to develop a decision focus assessing Omni-channeled adoption for the management of emerging technologies in food retailing during and after the era of COVID-19 to evaluate the omnichannel capabilities of food organizations. This establishes a decision model to fill the research gap to succeed and stay competitive in the food …

Postfire Effects And Regeneration Patterns In Araucaria-Nothofagus Forests In South-Central Chile, Paola A. Arroyo-Vargas

Dissertations and Theses

Fire regime shifts due to climate and land use changes are threatening ecosystems worldwide, affecting their capacity to recover after severe wildfires. Increase of fire frequency, severity and intensity may severely affect forest ecosystems whose fire regimes have been characterized by infrequent stand-replacing fires. The temperate forests of southern South America, specifically the Andean temperate forests dominated by the conifer Araucaria araucana and the angiosperm species from Nothofagus genus, have evolved with less fire pressure, where severe wildfires may happen after decades or centuries. Recent severe and short-interval fires exacerbated by warmer and drier climate conditions have affected these forests, …

Seeing In The Dark: Towards Robust Pedestrian Detection At Nighttime, Afnan Althoupety

Dissertations and Theses

"At some point in the day, everyone is a pedestrian" a message from the National Highway Traffic Safety Administration (NHTSA) about pedestrian safety. In 2020, NHTSA reported that 6,516 pedestrians were killed in traffic crashes and a pedestrian was killed every 81 minutes on average in the United States. In relation to light condition, 77% of pedestrian fatalities occurred in the dark, 20% in daylight, 2% in dusk, and 2% in dawn.

To tackle the issue from a technological perspective, this dissertation addresses the problem of pedestrian detection robustness in dark conditions, benefiting from image processing and learning-based approaches by: …

Uncovering The Nuance And Complexity Of Gentrification In Asian Immigrant Communities: A Case Study Of Koreatown, Los Angeles, Seyoung Sung

Dissertations and Theses

This dissertation examines the nuances and complexities of gentrification in Asian immigrant communities in transit-oriented neighborhoods of Los Angeles, with a particular focus on commercial changes. Utilizing a mixed-methods approach, the study aims to clarify how gentrification uniquely affects these communities, both in terms of residential and commercial aspects. The primary question of this research is: How do gentrification dynamics and consequences manifest uniquely in Asian immigrant communities?

The research unfolds in two stages. First, the study begins with a comprehensive analysis of neighborhood changes in Asian immigrant communities focusing on demographic dynamics, housing shifts, and commercial trends. The analysis …

Emotion Knowledge, Its Applications, And Their Associations With African American Children's Social Relationships With Teachers And Peers In Kindergarten And First Grade, Brielle Emily Petit

Dissertations and Theses

Close and high-quality relationships with teachers and peers are a significant, positive predictor of young children's academic and social-emotional skills, whereas early conflictual relationships can pose various short- and long-term socio-emotional and academic risks. Evidence also suggests that emotion knowledge, or the ways children identify, recognize, and apply emotional labels, are a crucial factor in children's early development including overcoming social-emotional challenges and fostering high-quality interpersonal relationships. Studies examining social relationships and emotion knowledge in early childhood, however, often reveal worrisome differences in between-group comparison designs. Particularly, minoritized children, and most often Black and African American, are associated with poorer …

Tiny Drifters Amidst Global Change: Examining Environmental Drivers, Trophic Impacts, And Management Strategies Of Estuarine Plankton Communities In The Anthropocene, Taylor Nicole Dodrill

Dissertations and Theses

Plankton productivity supports estuarine food webs, and has been tied to the success of fisheries, macroinvertebrates, and cultured shellfish yields. Climate change and alterations to nutrient loads are thought to be influencing plankton assemblages, with toxin-producing harmful algal blooms (HABs) on the rise and nutritional quality of plankton declining globally. These shifts in plankton communities may contribute to low biomass yields and toxin-based closures of important fisheries. The objectives of this dissertation are to identify environmental drivers, trophic impacts, and management strategies to understand and respond to changing estuarine plankton communities. To address these objectives, I used a combination of …

Behavior Training For Educators: What Training Do Educators Need To Support Students With Challenging Behaviors?, Michelle R. Milburn

Dissertations and Theses

The purpose of this study was to investigate the behavioral training programs/frameworks and Professional Development (PD) delivery methods that certified staff - including teachers, speech-language pathologists, school psychologists, occupational therapists, and teachers on special assignment - as well as administrators, believe to be necessary to address the academic, social, emotional, and behavioral needs of students exhibiting challenging behaviors. This national study used survey methods to explore the views of US K-12 public school educators on the PD needed to support student behavior effectively. Using social media recruitment, primarily through Reddit and Facebook, allowed the survey to reach a substantially larger …

The Establishment And Shaping Of The Education System And National Identity In Manchukuo, Tianyang Lei

Dissertations and Theses

This thesis studies the education system and national identity of Manchukuo the nationstate (1932-1945). In September of 1932, the Japanese army staged the "Mukden Incident," a bombing of a railway line near Shenyang that was used as a pretext for the invasion of Manchuria. Following the incident, the Japanese established the state of Manchukuo with the last emperor of China, Puyi, as its nominal head of state. The establishment of Manchukuo marked the beginning of Japan's aggressive expansion in Asia and its militarization of the region. It also marked the start of Japan's effective control over large portions of Northeast …

Energy Auction With Non-Relational Persistence, Michael Ramez Howard

Dissertations and Theses

As the current landscape for electric vehicles changes, options for remote charging are expanding to keep up. In the United States alone, sales of electric vehicles grew 85% from 2020 until hitting 450,000 units by the end of 2021. While these growing sales are encouraging, commercial charging stations have a long way to go before they are as ubiquitous as gasoline stations are today. The peer-to-peer energy auction helps fill the gap in underserved areas by allowing private homeowners to share their charging facilities with other electric vehicle drivers. The auction framework wraps existing charging outlets with a Cloud-connected microcontroller. …