Digital Commons Network^™

Development Of Cellulose-Based, Semi-Interpenetrating Network Hydrogels As Tissue-Adhesive, Thermoresponsive, Injectable Implants, Jesse Martin

Dissertations and Theses

Abstract Development of Cellulose-Based, Semi-Interpenetrating Network Hydrogels as Tissue-Adhesive, Thermoresponsive, Injectable Implants

Hydrogels are three-dimensional polymer networks with high water content and tunable mechanical properties, which have been widely investigated as replacements for soft tissues, such as the intervertebral disc (IVD). Various derivatives of the plant polysaccharide, cellulose, have been explored for use as injectable hydrogel implants. Methylcellulose (MC), which exhibits thermogelation at temperatures above 32°C, and relatively hydrophilic carboxymethyl-cellulose (CMC), are versatile cellulosic polymers that have shown promise as base materials for such applications. In prior work, functionalization with methacrylate groups allowed for the formation of stable, covalently crosslinked …

Towards Simulation Of Complex Ocean Flows: Analysis And Algorithm For Computation Of Coupled Partial Differential Equations, Wenbin Dong

Dissertations and Theses

The hybrid CFD models which usually consist of 2 sub-models, develop our capability to simulate many emerging problems with multiphysics and multiscale flows, especially for the coastal ocean flows interacted with local phenomena of interest. For most cases, the sub-models are connected with direct interpolation which is easy and workable. It becomes urgently needed to investigate the inner mechanism of such model integration as this simple method does not work well if the two sub-models are different in governing equations, numerical methods, and computational grids. Also, it can not treat complex flow structures as well as the balance in mass …

Low-Intensity Ultrasonic Neuromodulation Of The Rat Hippocampus, Duc Nguyen

Dissertations and Theses

Techniques to non-invasively modulate brain activity are important for mapping human brain circuits, and also for the treatment of a host of neurological and psychiatric disorders marked by aberrant brain activity. Though a wide range of techniques for non-invasive neuromodulation have been proposed, the conventional approaches suffer from significant limitations. Most notably, focal stimulation of deep brain regions is presently only possible with invasive optogenetic and chemogenetic approaches that require craniotomies and genetic access to the brain.

Transcranial focused ultrasound stimulation (tFUS) possesses many of the characteristics desirable from a neuromodulation approach: non-invasiveness, a spatial resolution in the order of …

Youtube, Cyberbullying And Covid-19, Ani Shavliashvili

Dissertations and Theses

The purpose of this research is to uncover how people discuss bullying or cyberbullying experiences via YouTube videos before and after the start of the COVID-19 pandemic. Since people were indoors during the pandemic, individuals took to social media and left comments on YouTube about bullying. Since people could not discuss bullying in-person, it was interesting to see how people shared their views on bullying and cyberbullying via YouTube, as well as how that might have changed after the start of COVID-19. The purpose of this study is to demonstrate how social media platforms like YouTube provide a safe space …

Discrimination Against Veiled Women In The West: Social Isolation, Amina M. Abdallah

Dissertations and Theses

This research examines the discriminatory practices faced by veiled women in the West that impede their integration into their local communities or lead them to feel socially isolated. Societal prejudice and, in some cases, the laws of the land often solidify this isolation of Muslim women and girls from the rest of the world. These victims of social oppression face discrimination based on multiple factors, such as their religion, race, and sex.

This study analyses preconceived notions regarding veiled women, incorporating evidence from seventeen qualitative interviews done with veiled Muslim women residing in the West, particularly the United States, United …

Joint Laughter Between Patient And Therapist: Exploring The Function Of These Moments And Their Relationship To The Working Alliance In Short-Term Psychotherapy, Molly Rappaport

Dissertations and Theses

Laughter emerges in infancy and reflects mutually aroused and regulated positive affect within the caregiver-infant relationship and repeated cycles of shared, co-regulated positive arousal have been shown to play a critical role in fueling secure attachment bond formation and laying the groundwork for the infant’s capacity for affect regulation (Schore, 2003). Throughout life, laughter continues to function as an attachment behavior with the possibility of promoting interpersonal closeness or creating distance. Attitudes toward the role of laughter in psychotherapy vary among psychodynamically-oriented clinicians and research has mostly focused on the kinds of humor and interventions that provoke laughter rather than …

Holistic Treatment: A Qualitative Study Of The Integration Of Chinese Medicine With Psychoanalysis In China, I. Wang

Dissertations and Theses

With its fundamental principle of body-mind unity, Chinese medicine has long been regarded as one of the most influential bedrocks of holistic treatment. Given its prevalence in China, Chinese medicine (CM) is a culturally appropriate way for therapists in China to integrate with psychoanalysis. This qualitative study investigates how Chinese psychotherapists in China with Western psychanalytic backgrounds synthesize the principles and methods of CM into their practice. Further, the barriers and facilitators to the integration are also examined. With a sample of twelve Chinese psychotherapists in China primarily trained at The China American Psychoanalytic Alliance, through semi-structured interviews, therapists' integration …

The Gendered Interpretation Of Child Marriage: A Niger Case Study, Melissa Safi

Dissertations and Theses

This paper seeks to answer the question, what is the primary factor driving child marriage? I explore the literature in several scholarly articles that explain why the harmful, traditional practice of child marriage is an issue that predominantly affects girls globally. I also utilize the feminist theory of international relations to support my analysis of child marriage as a gender issue. Incorporating evidence from annual international reports, scholarly articles, and mixed methods studies, this paper examines a case study of Niger, where child marriage affects more than half the population of girls under the age of 18. In studying Niger, …

Investigations Of The Therman Treatment Of Sodium Thiosulfate In Gas Streams For The Removal Of I2, Anjeza Arapi

Dissertations and Theses

The aim of this work was to study the performance of sodium thiosulfate in several systems. Sodium thiosulfate decomposition and SO2 conversion were analyzed using thermogravimetric analysis combined with chromatographic techniques. Thermogravimetric analysis (TGA) measurements determined the decomposition of the acidification reaction of 30% sodium thiosulfate solution in a 14% carbon dioxide (CO2) atmosphere and 1% hydrochloric acid (HCl) solution in the temperature regime of 300 - 750 K. Sodium thiosulfate and sulfur dioxide (SO2) are considered effective methods for removing iodine (I2) from air and flue-gas streams respectively. In acid containing gas-streams where the SO2 content is determined by …

The Enduring Role Of Conflict In The Perpetuation Of Famine: Advancing 'The Right To Adequate Food' For Sustainable Peace, Robert M. Bane

Dissertations and Theses

The present thesis evaluates developments and trends in global conflict dynamics, global systems of governance, and global hunger. Together, the thesis investigates and upholds the notion that famine is a ‘man-made’ phenomenon and explains how famine persists in a world abundant with food. Through analysis and research the following is found: the occurrence of global conflict is accelerating alongside an increase in the severity of organized violence dynamics; global authoritarianism is expanding presenting a threat to global freedoms and liberal democracy; as these trends are occurring, world hunger is steadily on the rise reflecting a significant backsliding of progress achieved …

The Relationship Between Discrimination And Alcohol Use Among Latinx College Students In The Context Of Covid-19, Mahtab Tuba

Dissertations and Theses

Latinx are the largest minority group in the United States. Ethnic discrimination is a common experience among this population—especially among young adults. Prior work has suggested an association between discrimination, psychological well-being, and alcohol use. Research has also highlighted that social support may buffer the impact of discrimination upon Latinx mental well- being and alcohol use. The present study investigated the relation between the appraisal of discrimination and alcohol-related outcomes (i.e. frequency of use, binge drinking, alcohol- related consequences and risky behavior) of Latinx college students in the context of the COVID-19 pandemic. We evaluated social support as a moderator …

Shear Thickening In Dense Bidisperse Suspensions By Dynamic Simulation, Nelya Malbranche

Dissertations and Theses

Shear thickening, which corresponds to an increase of viscosity with shear rate, is ubiquitously observed in many concentrated suspensions and, as such, has implications for many industrial materials and geological phenomena. Controlling shear thickening is of significant importance, and many studies have been devoted to it. Recent works link shear thickening to the shear-induced transition from a lubricated particle interaction at low shear stress to a predominantly frictional interaction at high stress. In this dissertation, we investigate bidispersity and focus on mechanisms contributing to the viscosity evolution in rate-dependent suspensions, something that has not been addressed before. We perform detailed …

Exosome- And Microrna-Based Therapeutic Approach For Tendinopathy, Angela Wang Ilaltdinov

Dissertations and Theses

Tendinopathy, characterized by degeneration and chronic inflammation, is a significant clinical burden. Current treatments focus on symptom management but do not sufficiently address its underlying pathology; however, stem cell-based approaches aimed at repairing diseased tissues may overcome this limitation. Therapeutic effects of stem cells may be due in part to paracrine actions, including some mediated by exosomes – extracellular vesicles secreted by cells that play a role in cell communication. MicroRNA (miRNA), small non-coding RNA carried by exosomes, are likely responsible for many exosome effects. Exosomes and miRNA therapies show promise in treating diseases such as cancer and arthritis, but …

Amplifying Agency And Presence Of Native American Women In 21st Century Literature, Rachel Mitchell

Dissertations and Theses

This project analyzes Native American women's voices and agency through their presence in a variety of 21st-century literary genres. The texts illuminate a clear presence of Native American authors who actively write Native American female characters that are powerful and take agency over their bodies and stories. The examples of Native American female characters allow readers to see more realistic and relatable figures within literature. Chapter one focuses on the empowering Native American female protagonists in Larissa FastHorse’s What Would Crazy Horse Do? (2019) and Mary Kathryn Nagle’s Sovereignty (2020). The playwrights offer crucial insight into more empowering and complex …

Effective Mental Health Accommodations For Occupational Therapy Students And Practitioners, Allison Jo Naber

Dissertations and Theses

The process of transitioning from high school to higher education and from academic programs outside of the health sciences to the workplace is documented; however, the transitional experiences of those in the health professions and occupational therapy specifically are less understood. This dissertation research aimed to identify the formal accommodations and informal adaptations occupational therapy students and entry-level practitioners have employed to address their mental health needs as they transition from the classroom to fieldwork or capstone and entry-level practice. The link between empirical literature, theories surrounding transitions, and the Occupational Adaptation Model provided the foundation for this research. This …

The Inclusion Of Rape And Other Non-Consensual Sexual Acts In Self-Insert Fanfiction, Diana Rose Humble

Dissertations and Theses

As the internet grew in popularity, fanfiction followed suit. As of April 2022, there are over 9,188,000 works posted on Archive of Our Own, one of the internet’s most popular fanfiction hosting sites. A large number of the stories posted on this site feature a concept known as self-insert, where an author chooses to write themselves into their own story as a central character. Instead of naming their self-insert characters, many authors will use the tag y/n—meaning “your name”—to expand the fantasy to include all readers. Curiously, a subsect of self-insert fanfiction features rape or non-consensual sexual acts perpetrated against …

Density Functional Theory Of Samarium(Ii) Reactivity In Thf And Water, Parisa Fasihianifard

Dissertations and Theses

Sm(II) diiodide is widely used in organic synthesis for the reduction of functional groups such as esters, anhydrides, amides, carbonyls, and arenes. Moreover, in aqueous systems and in mixtures of water and THF, the addition of Sm(II) diiodide can reduce water directly resulting in the formation of hydrogen gas. However, the mechanism of these reactions is not completely understood, making it difficult to improve experimental design. The reaction can proceed either through subsequent electron-transfer proton-transfer (ET-PT), subsequent proton transfer electron-transfer (PT-ET), or via proton coupled electron transfer (PCET). Density functional theory (DFT) calculations were performed to understand the speciation of …

Computational Study On The Nucleation Of Polyoxovanadate-Alkoxide Clusters, S M Gulam Rabbani

Dissertations and Theses

Polyoxovanadate-alkoxide (POV-alkoxide) clusters are a new class of electroactive species with potential electrochemical applications in redox catalysis, energy storage, and optoelectronics. These clusters' redox properties can be tuned by the functionalization via heterometallic installation and changing alkoxide ligands. However, the formation mechanism of these POV-alkoxides in the solvothermal process is unknown, limiting the rational design to improve their electronic properties. This dissertation reports the speciation study of POV-alkoxide clusters, which is fundamental to controlling and manipulating the evolution of transient species during their nucleation and tuning the final product's properties. Chapter 2 and chapter 3 describe our computational study of …

A Mixed Methods Approach To Understanding Participant Perspectives On Return Of Individual Research Results, Jyoti Angal

Dissertations and Theses

Provision of individual research results to participants is a critical component of the research process. While there is general interest amongst researchers in returning individual research results, a lack of understanding of the personal value of results for participants has hindered the return of individual results. This is especially true for non-genomic research results such as surveys, laboratory test results, or imaging results. This study examined the participant perspectives on the return of individual research results in a diverse cohort of 1587 mothers currently enrolled in the Environmental Child Health Outcomes (ECHO) program. A mixed-methods approach was used to delineate …

Semiconducting Polymer Dots-Based Ratiometric Fluorescent Probes For Detection Of Biomarkers, Shuyi He

Dissertations and Theses

Biomarkers serve a key role in illness diagnosis and treatment. Importantly, early detection can boost the therapy success rate greatly. However, traditional approaches to detect biomarkers based on fluorescence intensity changes of individual fluorophores did not completely realize the potential due to several technical problems such as low sensitivity. Ratiometric fluorescent methods use changes in the intensity of two or more emission bands (caused by the analyte) to create an internal reference that improves detection sensitivity. Due to their unique photophysical properties, such as high fluorescence intensity, high quantum yield, and low toxicity, semiconductor quantum dots (Pdots) are an ideal …

Abomination, Elias Joel Donstad, Anneliese Donstad

Dissertations and Theses

Abomination is a collection of creative nonfiction essays through which I examine my sexual and gender identity alongside negotiating the trauma of my childhood, adolescences, and early adulthood. I specifically interrogate how evangelical Christianity acted as a traumatizing agent in its focus on the total depravity of humanity and demonization of queerness. I explore the various ways language impacts and constructs individuals and their experiences. The essays in this collection partly come together to form a narrative of my life; however, this collection is not arranged to be chronological. There is no singular narrative arc. While the essays are interconnected, …

The Derivation Of Geologic Ecosystem Services From Geodiversity In The Black Hills Region Of South Dakota And Wyoming, James Campbell Cooke

Dissertations and Theses

The ecosystem services approach seeks to recognize the benefits that people obtain from ecosystems, in order to highlight society’s dependence on natural systems. Ecosystem services fall into four categories: provisioning, regulating, cultural, and supporting services. Most of the ecosystem services research literature is focused on services that arise from biotic components of ecosystems. Ecosystems are dynamic complexes of biotic communities and their physical, non-living environment, interacting as a functional unit. The emphasis on biotic ecosystem services leaves understudied and undervalued the role of the abiotic, physical environment, especially in providing geologic ecosystem services. Geologic ecosystem services have been the focus …

Ecological Changes Of The Lower Niobrara River Valley And Lewis And Clark Lake Delta From Past To Present, Madalyn Christine Bollig

Dissertations and Theses

Over half of the world’s large river systems are impacted by dams. These may prevent sediment flow downstream, resulting in accumulation in the upstream reservoir. On the Missouri River, deltas and associated backwater-affected areas occur in nine locations across six reservoirs. One of these, the Lewis and Clark Lake delta-backwater, is influenced by sediment inputs from both the Missouri River and the Niobrara River. While the extension of the prograding delta into the reservoir has been well documented, there has been little research on upstream (backwater) effects of the delta on the lower Niobrara River. This study examined ecological changes …

Biodiversity In Residential Yards For Sustainability In Small Cities: Understanding Public Attitudes, Opportunities And Limitations In Vermillion, Sd, Rina Thapa

Dissertations and Theses

As urban areas are expanding with the growing size of human population, it is increasingly important to understand the role that residential yards can play in biodiversity conservation because they often comprise a large proportion of green spaces in cities. Most of the research performed to date on the role of residential yards in biodiversity conservation has been conducted in large cities. The role of residential yards in biodiversity conservation in small cities is still largely unknown. In this research, I discuss the relationship between biodiversity and the structure of green space, public attitudes towards the presence of wildlife, public …

Distribution And Characterization Of Rhyolites Of The Strawberry Volcanics -- Evolution Of A Major Rhyolite Field Associated With Columbia River Basalt Magmatism, Eastern Oregon, Usa, Chanel Leigh Dvorak

Dissertations and Theses

The Strawberry Rhyolites constitute a significant rhyolite field among the largest in Oregon. Aerial coverage of approximately 386 km² and an overall estimated volume of ~67 km³ using a median thickness for each unit. On the other hand, the total volume could be greater than 100 km³ if greater thicknesses apply. The Strawberry Rhyolites, a largely unknown mid-Miocene silicic volcanic rocks, crop out amongst voluminous flood basalt flows of the Columbia River Basalt Group (CRBG) in eastern Oregon. The eruptive activity of the Strawberry Rhyolites is currently constrained to span a period of about 2 million years, …

The Dark Realism Of Miyazawa Kenji: Social Activism In The Science-Fiction Children's Story, The Life Of Gusukō Budori, And Its Precursor Work, Elsiemae Ann Ito

Dissertations and Theses

Miyazawa Kenji (1896-1933) is widely known in Japan as a children's story writer and poet, but he was also grounded in real life as a teacher, soil scientist, and farmer. Recognizing the harsh realities for farmers in his native Iwate, he nonetheless dreamed of an ideal world, as seen in his stories. To better understand the dark realities of life in Iwate, Japan, Miyazawa changed his occupation from teacher to farmer, focusing more on social activism that would better the lives of the people in his community. His late children's story, The Life of Gusukō Budori (Gusukō Budori no …

Characterization And Interpretation Of Feldspathic Chromite Assemblages (Fcas) In Four Ordinary Chondrites: An Electron Backscatter Diffraction (Ebsd) Study, Kimberly Louisa Maccini

Dissertations and Theses

Feldspathic Chromite Assemblages (FCAs) are chemically distinctive assemblages rich in Na, Al, and Cr that are found in a variety of chondrites. They consist of concentrations of chromite associated mainly with feldspathic material, either feldspar or the glassy material known as maskelynite. Professor Alan Rubin (2003) has proposed that some FCAs formed by shock melting, but the origin of different types of feldspathic chromite assemblages are unclear and have not been studied with more modern techniques such as Electron Backscatter Electron Diffraction (EBSD).

Here EBSD was used to study FCAs in four metamorphosed ordinary chondrites of different shock stages, including …

Selective Oxidation Of Alkenes In Air Catalyzed By Mn3o4 Nanoparticles, Brojo Kishor Shachib Dhali

Dissertations and Theses

Catalytic oxidation is a process where compounds are oxidized using catalysts. Solid catalysts exhibit several advantages over homogeneous systems, such as catalyst recovery and excellent stability. Various supported transition-metal oxides (for example: CuO, ZnO, CeO2, Fe2O3 and WO3), metal nanoparticles (for example: Pd and Ru) and polyoxometalate clusters (for example: [W10O32]4-, [Mn2ZnW(ZnW9O34)2]10- and [XW12O40]n- (X = P, Si)) have been applied to selective oxidation of organic compounds, but high associated product conversion still remains a challenge. Recently, a number of materials containing Mn3O4 have been used successfully in different catalytic applications, such as degradation of phenols, reduction of nitrobenzenes, and …

Nature-Based Solutions In Environmental Planning: Ecosystem-Based Adaptations, Green Infrastructures, And Ecosystem Services To Promote Diversity In Urban Landscapes, Lorena Alves Carvalho Nascimento

Dissertations and Theses

Nature-based solutions encompass strategies that explore ecosystem-based adaptations, green infrastructures, and ecosystem services in environmental planning and landscape management. However, nature-based solutions do not always consider ecological values and perspectives from Black, Indigenous, and Global South population. This dissertation has three independent papers that explore the application of ecosystem-based adaptations, green infrastructures, and ecosystem services in communities unheard by environmental planning agencies. The first paper is a conceptual framework that used literature review and observations of current human-nature interactions to reflect how the criminalization, acculturation, and cultural appropriation of cultural ecosystem services have burdened Black and Indigenous identities. Recommendations for …

Ecological Exposure And Effects Of Microplastics In Crabs Along The Pacific Coast, Dorothy A. Horn

Dissertations and Theses

Microplastics have been documented across the global oceans as an ubiquitous pollutant. Found in the water column, sediment, shorelines, estuaries, freshwater streams and rivers along with terrestrial soils, flora and fauna. The continuous input of plastic waste into the marine environment doesn't seem to be slowing as the amount of plastic created each year increases globally.

This study investigated (1) the effects of microplastic ingestion in the indicator species, the Pacific mole crab (Emerita analoga), testing the predator avoidance behavior, reproductive output and parasitism effects when an adult female gravid crab had ingested microplastics (2) adult mortality, hatching …