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Struvite Effects On Greenhouse Gas Emissions From Flood- And Furrow-Irrigated Rice In The Greenhouse, Chandler Arel
Struvite Effects On Greenhouse Gas Emissions From Flood- And Furrow-Irrigated Rice In The Greenhouse, Chandler Arel
Graduate Theses and Dissertations
Over time, as the influences of climate-change and declining, mineable, global phosphorus (P) reserves begin to impact agricultural production systems, alternative fertilizer sources and management practices, such as struvite (MgNH4PO4 · 6H2O) and furrow-irrigation, will be necessary to accommodate nutrient and water demands. The precipitation and use of struvite as a fertilizer-P source could reduce environmental damages caused by nutrient-rich wastewater streams, supplement domestic P supply, and improve the sustainability of flood-, and furrow-irrigated rice production by reducing greenhouse gas emissions. The study of struvite from both chemical and electrochemical precipitation processes is well documented, …
Atypical Responses To Sensory Stimuli Or Eating Environments In Children With Autism Spectrum Disorder, Lydia Rockers
Atypical Responses To Sensory Stimuli Or Eating Environments In Children With Autism Spectrum Disorder, Lydia Rockers
Graduate Theses and Dissertations
Children with autism spectrum disorder (ASD) often encounter challenges in processing sensory inputs. Children with ASD may experience feeding difficulties and over- or under- stimulation during food-related activities such as eating or shopping. These have impacts on the health and well-being of individuals with ASD in childhood and throughout their lives. Further research is needed to address the impact of ambient sound levels in a retail or restaurant setting. The main objective of this thesis was to address these gaps by identifying responses to various environmental and food related stimuli. The findings of this research addressed differences in responses between …
Student Perceptions And Academic Performance When Taught With Multiple Active Learning Methods In A High Enrollment Undergraduate Human Physiology Course, Kate Ireton Walker
Student Perceptions And Academic Performance When Taught With Multiple Active Learning Methods In A High Enrollment Undergraduate Human Physiology Course, Kate Ireton Walker
Graduate Theses and Dissertations
When instructing very large groups of students in science, it can be difficult to engage all students in the content and measure their understanding. A major unaddressed challenge in science instruction is how specifically to design and implement strategies that engender active learning particularly in high-enrollment undergraduate courses. Active learning, which represents a diverse set of strategies, may include student engagement as part of instruction through discussions, active movement, and application (Bernstein, 2018; Cavanagh, et al. 2016; Michael, 2006 & Wilke, 2003). This study was designed to provide data addressing the gap in the literature regarding how the continual implementation …
Optimization Of And Mechanistic Insights Into Photocatalytic And Non-Thermal Plasma Degradation Of Organic Pollutants For Sustainable Wastewater Treatment, Yiting Xiao
Graduate Theses and Dissertations
Water pollution by organic pollutants poses a significant environmental threat, necessitating the development of advanced treatment technologies to ensure sustainable and efficient remediation. This dissertation explored innovative approaches to enhance the degradation of organic pollutants through the integration of photocatalytic and plasma-assisted systems, with a focus on optimizing these processes using methodologies ranging from response surface methodology (RSM) to advanced machine learning techniques. The first part of the dissertation investigated the degradation of organic pollutants in flocculated liquid digestate using photocatalytic titanate nanofibers (TNFs) synthesized via a hydrothermal method. This study represents the first application of TNFs, with a bandgap …
Esd-Robust 4h-Sic Low-Voltage Cmos Technology Development For High Temperature, Hui Wang
Esd-Robust 4h-Sic Low-Voltage Cmos Technology Development For High Temperature, Hui Wang
Graduate Theses and Dissertations
This dissertation explores the development and optimization of electrostatic discharge (ESD)-robust, low-voltage CMOS technology using 4H-silicon carbide (SiC) tailored for high-temperature applications, addressing the critical need for reliable semiconductor devices in harsh environmental conditions. The advent of SiC as a semiconductor material offers significant advantages over traditional silicon (Si) in harsh environments, including higher thermal conductivity, greater electron mobility, and improved electrical characteristics at elevated temperatures. This research explores the integration of 4H-SiC into CMOS technology to enhance device reliability and performance in extreme conditions such as those found in aerospace, automotive, and energy sectors. The study begins with a …
The Influence Of Commercial Salmonella Vaccination Programs On Local- And Systemic-Immune Responses And Ceca Microbiome In Egg-Type Chickens, Chrysta Noelle Beck
The Influence Of Commercial Salmonella Vaccination Programs On Local- And Systemic-Immune Responses And Ceca Microbiome In Egg-Type Chickens, Chrysta Noelle Beck
Graduate Theses and Dissertations
Salmonella vaccination is a widely accepted practice in the United States poultry industry. These vaccines stimulate a strong humoral response to Salmonella serovars and significantly reduce Salmonella load in the bird. In general, a Salmonella vaccination program for an egg-type pullet flock consists of two administrations of a live attenuated Salmonella vaccine at 1- and 6-wk-of-age followed by one administration of a Salmonella bacterin at 12-wk-of-age. Although these vaccines are regarded as effective against paratyphoid Salmonella infections, there are incidences of breakthrough Salmonella infections and severe injection site reactions after bacterin administration. Therefore, the main objective of this dissertation was …
Local And Systemic Inflammatory And Antibody Responses To Salmonella-Killed Vaccines In Egg-Type Pullets, Jossie Mair Santamaria Archbold
Local And Systemic Inflammatory And Antibody Responses To Salmonella-Killed Vaccines In Egg-Type Pullets, Jossie Mair Santamaria Archbold
Graduate Theses and Dissertations
Salmonella infection in chickens is a significant and complex challenge to manage, affecting poultry health and food safety. Vaccination against Salmonella is a promising preventative approach to control flock infection and decrease the loads of this pathogen. Vaccination strategies against Salmonella often comprise the application of live attenuated and killed (inactivated) vaccines, including inactivated autogenous vaccines. Live attenuated Salmonella vaccines stimulate both cellular and humoral immunity but can potentially return to a virulent state; meanwhile, inactivated Salmonella vaccines trigger more of a humoral response and are safer since they are entirely rendered inactive. However, there is a lack of information …
Controls On The Development Of Hummocky Topography On Debris-Covered Glaciers, Ryan M. Strickland
Controls On The Development Of Hummocky Topography On Debris-Covered Glaciers, Ryan M. Strickland
Graduate Theses and Dissertations
Rock debris covers many glaciers in Earth’s highest mountains and the debris impacts glacier response to changes in climate. Interactions between debris, drainage, glacier dynamics, and climate produce contrasts in melt rates that cause debris-covered glaciers to develop complex, hummocky topography. Contrasts in melt rate produce thousands of hills–hummocks–and depressions. Ponds and ice cliffs often form in the depressions. Although ponds and ice cliffs occupy only a small fraction of the surface, they account for nearly half of glacier melt. Understanding the processes that control the development of hummocky topography is key to predicting the evolution of debris-covered glaciers. In …
Micro-Mechanical Characterization Of Uhpc Stiffness Mechanisms: Towards A Better Understanding Of Concrete Elastic Modulus, Charissa N. Puttbach
Micro-Mechanical Characterization Of Uhpc Stiffness Mechanisms: Towards A Better Understanding Of Concrete Elastic Modulus, Charissa N. Puttbach
Graduate Theses and Dissertations
Current design code equations for estimating the elastic modulus of specialty concretes like ultra-high performance concrete are not all suitable. Developing empirical curves from exhaustive experimental testing is challenging for concretes that may have high levels of cement replacement with mineral admixtures and fibers at varying volume contents. As such, an alternative approach is taken that seeks to understand the constituent microscale stiffness mechanisms and relate the results to the macroscale. Micropillars are fabricated on several cement paste phases using a focused ion beam. A modified pico-indenter is used to determine the linear and non-linear behavior under micro-compression loading. Micropillar …
Memories Of Gimjang_김장: And Performance As The Practice Of Freedom, Chung Park
Memories Of Gimjang_김장: And Performance As The Practice Of Freedom, Chung Park
Graduate Theses and Dissertations
Memories of Gimjang_김장: and Performance as the Practice of Freedom reflects my response to a feeling of isolation as a Korean American MFA graduate student living in Northwest Arkansas for the last three years. This experience led me to an endless search for identity and place, compelling me to reach into my past and cultural history in relation to the present. To satiate a sense of home in this world, I turned to an artistic intervention to translate the indecipherable, which brought to life my thesis performance, Gimjang_김장:. Gimjang_김장: allowed me to reveal multitudes of experiences and imagined a possibility …
Green At Eye Level: From Measurement Approaches To Simulated Models And Inequality Assessments In U.S. Major Cities, Jingjing Yan
Green At Eye Level: From Measurement Approaches To Simulated Models And Inequality Assessments In U.S. Major Cities, Jingjing Yan
Graduate Theses and Dissertations
This dissertation delves into the multifaceted dynamics of urban greenness, addressing critical aspects of sustainable urban development. Providing urban green spaces has been widely acknowledged to offer numerous benefits to individuals and communities. Recently, there has been a growing recognition of the importance of evaluating urban greenness from a human-centered perspective, partly due to the rapid development of eye-level greenness measurement. First, to provide a comprehensive overview of measurement approaches and topics related to eye-level urban greenness, a systematic review of 77 papers was conducted in this research. This review revealed that street view images are the primarily utilized data …
Sincerely, Regan Leigh Chrisman-Boman
Sincerely, Regan Leigh Chrisman-Boman
Graduate Theses and Dissertations
Sincerely is a compilation of diaristic narratives depicted through the lens of a distorted reality. This distortion is manifested through the influence of social norms placed on me and my gendered experience of this world. The stories I tell through my work deal with the mind, body and daily life. My images within this body of work are sourced from my written journal, and creating a visual diary. I provide a space of relatability for the viewer to feel seen and not alone through the discussion of personal experiences that are both unique and not unique to myself. The work …
Providing A Statistical Analysis Framework For Agencies To Analyze The Parameters Influencing The Rutting And Cracking Performance Of Asphalt Mixtures, Mohammad Tahir Ansari
Providing A Statistical Analysis Framework For Agencies To Analyze The Parameters Influencing The Rutting And Cracking Performance Of Asphalt Mixtures, Mohammad Tahir Ansari
Graduate Theses and Dissertations
Many state agencies recognize that their current asphalt mixtures are susceptible to cracking and poor durability. Some agencies are adjusting their mix design procedures to increase the asphalt binder content, while others are moving toward a balanced mix design (BMD) to try and address both cracking and rutting. However, there is uncertainty on what asphalt mixture properties can impact cracking and rutting. This research explores the IDEAL-CT and APA data from two years of mix designs collected by ARDOT. To understand which asphalt mixture properties impact cracking and rutting in the field, Pearson correlation (PCM), Spearman rank correlation (SCM) and …
Proctor And Harvard Miniature Compaction Energy Comparison, Julia Loshelder
Proctor And Harvard Miniature Compaction Energy Comparison, Julia Loshelder
Graduate Theses and Dissertations
Compaction with the Harvard Miniature Compaction Apparatus (HMCA) was investigated to develop a method that can be used in place of typical Proctor compaction. Advantages for compaction with the HMCA include the need for less soil for testing and less preparation time. To investigate the potential for HMCA as a replacement, soil specimens were compacted with both the Proctor and HMCA methodologies at equivalent energies. For this testing, the testing included modified energy (56,250 ft-lbf/ft3 [2693 kN-m/m3]), standard energy (12,375 ft-lbf/ft3 [593 kN-m/m3]), and reduced energy (6188 ft-lbf/ft3 [296 kN-m/m3]). Because …
The Frimpong Case, Vincent Frimpong
The Frimpong Case, Vincent Frimpong
Graduate Theses and Dissertations
The Frimpong Case is the gathering of skills and voices of Africans and African artists. My collaborators from my Ghanaian family and neighbors to my colleagues in the United States have influenced my practice, allowing me to expand the history I have learned from the African musicians who have deeply influenced me to my heritage and the research I am able to expand upon to promote my vision of my culture and legacy. This paper describes the body of work and speaks to the themes of collaboration, migration, assemblage, and installation. The Frimpong Case is the root of my visions …
Cyclic Testing Of A Skewed Special Moment Frame Rbs Connection Having A Composite Concrete Slab, Adam Neil Kirchner
Cyclic Testing Of A Skewed Special Moment Frame Rbs Connection Having A Composite Concrete Slab, Adam Neil Kirchner
Graduate Theses and Dissertations
Special moment frames (SMFs) having reduced beam section (RBS) connections are commonly used in high seismic areas as they resist lateral forces while preserving critical welded connection regions. RBS SMFs provide brace-free, unobstructed frame options which can be favorable for architectural purposes. However, when building designs require non-rectangular framing, laterally skewed connections may be needed. Current design provisions for SMF connections provide only limited commentary on such non-orthogonal connections as limited research exists documenting skewed frame behavior. This study experimentally evaluates the cyclic behavior of a full-scale double-sided skewed SMF RBS specimen having a composite concrete slab. During the imposed …
Linguistic Heritage In Digital Landscape: A Collective Memory Of Indigenous Script, Sumi Limbu
Linguistic Heritage In Digital Landscape: A Collective Memory Of Indigenous Script, Sumi Limbu
Graduate Theses and Dissertations
The present-day digital world reflects the historical structures of power, as evidenced by the dominant presence of specific languages in online spaces. Globalization, post-colonization, and language preferences on digital platforms also present significant dangers to indigenous languages, resulting in their gradual disappearance in both online and offline settings. The insufficient provision of typographical support and acknowledgment worsens the marginalization of indigenous languages by hindering their inclusion in digital spaces. The script plays a vital role in visual design by effectively delivering information. Language serves as the primary means of communication, which enables knowledge production. This study aims to look into …
Food Insecurity Among Women: The Data Gap And The Path Forward, Beth Dedman
Food Insecurity Among Women: The Data Gap And The Path Forward, Beth Dedman
Graduate Theses and Dissertations
Quantification frames the world in terms of hierarchies, reputation, and status, thereby making important indicators comparable, and subsequently stripping them of their context, history, and meaning. Numerical knowledge is essential, yet if it is not closely connected to more qualitative forms of knowledge, it leads to oversimplification, homogenization, and the neglect of the surrounding social structure. Feminist-based research is completely antithetical to this form of research, focusing on qualitative experiences, the effects of relationships of power, and adding the necessary context to the quantifiable information. As of yet, most research in the Northwest Arkansas region as it pertains to the …
Overpowered, Benjamin Pearey
Overpowered, Benjamin Pearey
Graduate Theses and Dissertations
Overpowered is a temporary installation of a tiled living room, modeled after my own living room in a rental apartment in Fayetteville, Arkansas. It takes its name from a kind of sci-fi electro-disco love song released in 2007 by Roísín Murphy, who breaks down romantic attraction into preprogrammed meanings, chemical needs and matching data - and her sense of losing control, succumbing to the overwhelming forces at play. My installation is borne from a similar feeling. It is a continuation of a navigation of daily life under the pressures of external forces exerted by the various systems that underpin society …
Turfgrass Soil Surfactants: Examining Active Ingredients, Application Strategies, And The Structure–Function Relationship In Sand-Based Putting Greens, Daniel O'Brien
Graduate Theses and Dissertations
Soil surfactants, commonly referred to as wetting agents, are a leading water management strategy for golf courses. Non-ionic block copolymers are the most common type of turfgrass soil surfactant. However, differences in the registration process and labeling requirements allow soil surfactants to enter the marketplace accompanied by far-less data compared to other products used on golf courses. This has led to considerable confusion among golf course superintendents. Three primary sources of confusion are: (i) the widely-used marketing terminology of “penetrants” and “retainers” to classify wetting agents; (ii) active ingredients which in some cases are not disclosed at all; and (iii) …
Exploring The Effects Of N,N-Dimethylbiguanide And Ω-3 Pufas On Muscle Stem Cell Differentiation, Enayah Alhshim
Exploring The Effects Of N,N-Dimethylbiguanide And Ω-3 Pufas On Muscle Stem Cell Differentiation, Enayah Alhshim
Graduate Theses and Dissertations
The impacts of omega-3 (ω-3) fatty acid and metformin hydrochloride (Met-HCl) on muscle stem cells differentiation, mimicking the fetal muscle development under gestational diabetes mellitus (GDM), were investigated. ω-3 fatty acids have been known for their ability to regulate adipogenic transcription factors such as Sterol Regulatory Element-Binding Protien (SREBPs) and Peroxisome Proliferator-Activated Receptors (PPARs). This regulation resulted in gene expression modification for lipid metabolism and adipocyte differentiation, thus preventing excessive fat accumulation. Additionally, emerging evidence suggested that ω-3 fatty acids may also exert direct effects on myogenic processes that influence muscle stem cells proliferation, differentiation, and maturation. Meanwhile, Met-HCl, an …
The Water That Will Be: A Qualitative Look Into The Effects Of Visual Imagery On Participation In Water Conservation Initiatives, Shane Martin White
The Water That Will Be: A Qualitative Look Into The Effects Of Visual Imagery On Participation In Water Conservation Initiatives, Shane Martin White
Graduate Theses and Dissertations
This dissertation explored the role of visual imagery in water conservation initiatives, focusing on its impact on public understanding, emotional connection, and willingness to participate. Drawing from the Theory of Planned Behavior and Affective Disposition Theory, the study investigated how art interventions can enhance comprehension and engagement with water conservation easements. Utilizing qualitative methods, including interviews, focus groups and PhotoVoice, data was collected from stakeholders in the Illinois River Watershed region. The research examined current levels of understanding regarding conservation easements, evaluated the effectiveness of visual imagery interventions in enhancing public awareness, and identified the potential for collaborative approaches between …
Examining Eight-Year Bachelor’S Degree Completion Rates For U.S. Institutions Offering Competency-Based Education And Comparable Traditional Institutions, Gray Carpenter Church
Examining Eight-Year Bachelor’S Degree Completion Rates For U.S. Institutions Offering Competency-Based Education And Comparable Traditional Institutions, Gray Carpenter Church
Graduate Theses and Dissertations
Competency-based education (CBE) is a learner-centric framework that emphasizes what students “know and can show” more than how much time they spend in the classroom. CBE advocates claim that by allowing students to take as little or as much time as they need to demonstrate their mastery of course competencies, students develop higher levels of proficiency and are better prepared to enter the workforce. Despite having been in existence for decades, CBE has not been widely adopted in postsecondary education, and studies of CBE as a viable alternative to traditional methods of education remain scarce. The purpose of this cross-sectional …
Career Skills Congruence: Transferring Military Talent To The Civilian Job Market: A Preregistered Study, Anna M. Amos
Career Skills Congruence: Transferring Military Talent To The Civilian Job Market: A Preregistered Study, Anna M. Amos
Graduate Theses and Dissertations
The training and experience gained through U.S. military service instill a strong sense of discipline, loyalty, and duty to one's country while preparing service members for the challenges they face during their military careers. Military culture is a defining aspect of servicemembers' identities, especially for those who have spent significant time in the military. The problem is that service members often enculturate into a life where they adopt an identity incongruent with the ability to engage in a smooth transition to civilian culture. The purpose of this cross-sectional regression study is to test social identity theory and transition theory that …
Key Practices In P-6 Integrated Stem Education: A Delphi Panel Investigation, Leah R. Cheek
Key Practices In P-6 Integrated Stem Education: A Delphi Panel Investigation, Leah R. Cheek
Graduate Theses and Dissertations
Throughout the past two decades policymakers, practitioners and researchers have been summoned to pursue best practices to address and implement improvements in STEM education for P-12 students (Archer, Moote, MacLeod, Francis, & DeWitt, 2020; Emrey-Arras, 2018; Hodson, 2003; National Research Council, 2012). Irrespective of the longstanding investment of time and resources towards STEM education, students’ patterns of STEM involvement in schools continue to be persistently unchanged (Archer, et al., 2020; Ro & Knight, 2016) and even fewer Americans are entering STEM disciplines in the workforce (National Science Foundation, 2018). The purpose of this three-article dissertation study is to support effective …
Killdeer, Elizabeth Muscari
Killdeer, Elizabeth Muscari
Graduate Theses and Dissertations
This thesis project investigates, through poetry, how women and nature intersect. Formal decisions depict themes of inheritance and the body through couplets, tercets, quatrains, contrapuntal, sonnets, among other free-verse forms.
Instagram And Influencer Marketing: An Empirical Study Of The Parasocial Interaction Theory And Its Effects On Purchase Intention, Caroline Marie Chumley
Instagram And Influencer Marketing: An Empirical Study Of The Parasocial Interaction Theory And Its Effects On Purchase Intention, Caroline Marie Chumley
Graduate Theses and Dissertations
Scholars have studied different factors that contribute to a parasocial interaction theory, and how this relates to purchase intention in the marketing industry. Previous research concentrates on parasocial interactions between television personalities and consumers, rather than influencers on social media. It is important to determine exactly what factors lead consumers to create a parasocial interaction with influencers in the media and determine how that parasocial interaction mediates purchase intention. Influencer marketing on Instagram is included in this study, as it contains brand-sponsored posts and allows users to interact with each other. This study utilizes the parasocial interaction model to determine …
Exploring The Governmental Intervention, Journalistic Approach, And Theories Involved In Reducing Poverty Journalistic For A Special Project – Feature Story On Non-Profit Organization Called Circles In Northwest Arkansas, Trevor Spencer
Graduate Theses and Dissertations
Over the 60 years since President Johnson declared the War on Poverty, with close to 40 million people currently in poverty nationwide as of 2022, government measures of the issue, like the Federal Poverty Level and Supplementary Poverty Measure, have continued to be significant determiners for who is constituted as poor. Yet, framing of the poor by sociologists has shifted to a more multi-dimensional approach to who constitutes as poor and how to help them. This means that the definition of poverty is beginning to include a larger set of deprivation unaccounted for in a nation where the definition of …
Using Aac To Build Young Beginning Communicators’ Inclusion In Song Routines, Sydney Miller
Using Aac To Build Young Beginning Communicators’ Inclusion In Song Routines, Sydney Miller
Graduate Theses and Dissertations
The present study examined the effectiveness of augmentative and alternative communication (AAC) on preschool-aged beginning communicators’ ability to participate linguistically during song social routines. The AAC used during the intervention phase were visual scene displays (VSDs). VSDs are color-realistic photos, often depicting real people, that are context-rich for the user. VSDs are less demanding and offer the user a way to communicate their thoughts, feelings, or emotions in a more contextualized way. The present study used a multiple-baseline across participants approach. The primary dependent measure was the linguistic participation of each participant using the VSD. The results indicated that each …
The Constant String Of Crises: A Critical Discourse Analysis Of Twitter Responses To Celebrity Crisis Communications, Megan Willman
The Constant String Of Crises: A Critical Discourse Analysis Of Twitter Responses To Celebrity Crisis Communications, Megan Willman
Graduate Theses and Dissertations
Celebrity crises are more prominent in today’s social-media-fueled world than ever before. Public relations teams are hired to handle these instances on behalf of the celebrity, but no one can control the discourse that ensues on social media. The end goal of these teams is to restore trust and reputation with stakeholders and fans. Although there have been many studies on crisis communications, there are few studies thus far that have examined the strategy as well as the discourse of such timely crises. The public figures included in this paper are Ashton Kutcher, Lizzo, Luke Combs, Mila Kunis, and Taylor …