Digital Commons Network^™

An Interdisciplinary Study To Understand Treatment Seeking Behavior Among Female Survivors Of Anorexia Nervosa, Meaghan Victoria Tipton

Graduate Theses and Dissertations

This study was done to examine what psychosocial factors influence treatment seeking behavior among female survivors of eating disorders. This study uses a mixed methods survey consisting of open-ended item questions regarding treatment experience and social environment, and close-ended items to measure constructs from the Health Belief Model. Fourteen participants were recruited for this study to retrospectively detail their experiences of treatment during their eating disorder. All fourteen participants identified as Caucasian, thirteen identified as female, one identified with other gender, each with a history of medically diagnosed anorexia nervosa. The mean of age of current participants was 29.46, and …

The Impact Of Social Media On The Social Lives Of People With Visual Impairment (Facebook Groups As A Case Study), Itto Outini

Graduate Theses and Dissertations

This present research seeks to provide a more comprehensive understanding of why people with visual impairment use social media. I investigate this question using uses and gratification (U&G) Theory, which was developed by Katz, Blumler, & Gurevitch (1974). The theory explains what people do with media and why. The purpose of this study is twofold: it seeks to document reasons people with visual impairment use Facebook and it endeavors to reveal which variables can influence users’ decisions to use one social media platform instead of another. In particular, I am interested in determining factors motivating users with visual impairment to …

Journalism Vs. Activism: How The Social Impact Of Journalism Has Evolved, Kathryn Serrano

Graduate Theses and Dissertations

The aim of this study was to question the objectivity norm that arose in journalism in the 20th century, and analyze what objectivity means today in the context of investigative journalism. This study examined the mission statements and objectives of the investigative nonprofits The Marshall Project and Injustice Watch, which are two publications with specific mission statements that cover the United States criminal justice system. The examination of these nonprofits helps explore a question of where the line is drawn between journalism and activism. The researcher interviewed 25 journalists from mainstream media outlets, the nonprofits discussed above, and other investigative …

How Does Disproportionality In Discipline Manifest In Rural Schools In Southeast Arkansas?, Julie Workman

Graduate Theses and Dissertations

African American students are disciplined in schools at disproportionately higher rates than White students. This trend was first reported in 1975 in a report by the Children’s Defense Fund and since that time, has been highly studied. However, most research has been conducted in urban or suburban schools, with less known about disproportionate discipline in rural schools. This study utilized an explanatory sequential mixed methods approach to explore disproportionate discipline between African American and White students in five rural schools located in Southeast Arkansas. The research questions were as follows: (1) How is discipline disproportionality perceived in specific rural schools …

Instagram And Eating Disorders: An Empirical Study Of The Effects Of Instagram On Disordered Eating Habits Among Young Girls, Katherine Wayles

Graduate Theses and Dissertations

Scholars have studied the relationship between body dissatisfaction and social media use, particularly focusing on young women as vulnerable consumers. Many studies concentrate on the amount of media consumed, rather than the specific activities and behaviors associated with feelings of low self-esteem or poor body image. It is important to determine exactly what behaviors and social media engagements contribute to disordered relationships with food, assessing a user’s pre-existing weight/body concerns in relation to the amount and type of media they consume. Instagram in particular is included in this study, as it is an image-based social networking site where users can …

A Power Constrained 433-Mhz Low Noise Amplifier, Pablo Alvarez Arellano

Graduate Theses and Dissertations

Within wireless communication systems, low noise amplifiers are critical for the performance of receivers. They are primarily responsible for providing enough gain while adding little noise to overcome the noise of the subsequent stages. The LNA presented here is part of a battery-powered transceiver meant to measure crop nutrient data and relay the information. Therefore, power consumption and area become import considerations. To design for a specific power level, a power-constrained noise optimization method is used. The method sizes the amplifying transistor for a fixed source impedance, power dissipation, technology, and operating frequency. The chosen topology is the cascode stage …

Low Latency Anomaly Detection With Imperfect Models, Samrat Nath

Graduate Theses and Dissertations

The problem of anomaly detection deals with detecting abrupt changes/anomalies in the distribution of sequentially observed data in a stochastic system. This problem applies to many applications, such as signal processing, intrusion detection, quality control, medical diagnosis, etc. A low latency anomaly detection algorithm, which is based on the framework of quickest change detection (QCD), aims at minimizing the detection delay of anomalies in the sequentially observed data while ensuring satisfactory detection accuracy. Moreover, in many practical applications, complete knowledge of the post-change distribution model might not be available due to the unexpected nature of the change. Hence, the objective …

Practitioner Use Of And Attitudes Toward Video-Conferencing For The Delivery Of Evidence-Based Telemental Health Interventions, Kathryn Parisi

Graduate Theses and Dissertations

Compared to telehealth delivery of interventions for physical health issues, the implementation of evidence-based psychosocial interventions using technology has less support. Video-conference delivery (VCD) has the potential to increase accessibility to effective treatments, although its use remains limited and understudied. This study employed a mixed methods approach in surveying mental health practitioners about their attitudes regarding the use of video-conference methods to deliver evidence-based interventions. One hundred and eleven practitioners were sampled from several national and regional practice organizations and administered quantitative surveys about their use of and attitudes towards VCD of evidence-based interventions. The relationship between clinician-level technology access, …

Sex, Stress, And The Supreme Court: Verbal And Vocalic Analysis Of Brett Kavanaugh’S Senate Confirmation Hearings To The Supreme Court, Alexandra Johnson

Graduate Theses and Dissertations

This study analyzed the relationship between verbal and nonverbal vocalic communication patterns exhibited by Brett Kavanaugh, now a sitting Justice on the U.S. Supreme Court, during his Senate confirmation hearings in 2018. Additionally, the relationship between verbal statement types: attempt to define reality, personal narrative, policy positions, attacks, acclaims, and defenses, and the nonverbal vocalics of sighs, sharp intakes of breath, and sniffs were evaluated together to see which statement types would elicit higher physiological stress responses during both the 16-minute speech given at the end of the Day One hearing and the 45-minute testimony during the sexual assault hearing. …

Dynamic Fraud Detection Via Sequential Modeling, Panpan Zheng

Graduate Theses and Dissertations

The impacts of information revolution are omnipresent from life to work. The web services have signicantly changed our living styles in daily life, such as Facebook for communication and Wikipedia for knowledge acquirement. Besides, varieties of information systems, such as data management system and management information system, make us work more eciently. However, it is usually a double-edged sword. With the popularity of web services, relevant security issues are arising, such as fake news on Facebook and vandalism on Wikipedia, which denitely impose severe security threats to OSNs and their legitimate participants. Likewise, oce automation incurs another challenging security issue, …

How Do Student And Secondary School Characteristics Explain College English I Completion In A Rural Arkansas Community College?, Jessica Rohlman

Graduate Theses and Dissertations

Community colleges serve diverse populations that may not be as academically prepared as at four-year institutions. Accountability of higher education institutions is ever-increasing in importance, so understanding the contributing factors to student success is critical. Students bring a unique set of characteristics to the community college, including individual traits and secondary school experiences. Many studies have examined these characteristics at large urban or mid-western institutions, but few in rural settings. Rural areas of the United States have lower rates of educational attainment than other areas, which often translates to lower incomes. It is the mission of community colleges to train …

(In)Equality., Jongin Choi

Graduate Theses and Dissertations

(in)Equality. centers around my experiences as a transnational person and those around me who have affected my current concept of equality and cultural histories. My visual methodologies cover digital photography and editing, inkjet printing, and laser engraving: multimedia in a process of new discovery, translation between analog and digital, and rearticulation. The exhibition includes portraits peering down from above, illuminated by projected patterns and manipulated messages from Nike’s “Equality.” (2017). The purpose of this thesis paper is to describe the elements of identity, marginalization, and personal reaction to advertising, as well as the and theories which have shaped this project. …

Truck Activity Pattern Classification Using Anonymous Mobile Sensor Data, Taslima Akter

Graduate Theses and Dissertations

To construct, operate, and maintain a transportation system that supports the efficient movement of freight, transportation agencies must understand economic drivers of freight flow. This is a challenge since freight movement data available to transportation agencies is typically void of commodity and industry information, factors that tie freight movements to underlying economic conditions. With recent advances in the resolution and availability of big data from Global Positioning Systems (GPS), it may be possible to fill this critical freight data gap. However, there is a need for methodological approaches to enable usage of this data for freight planning and operations.

To …

When They Sing A Song Of Joy With Sorrow, Ziba Rajabi

Graduate Theses and Dissertations

As an Iranian female artist, my work revolves around my desire to reconcile my relationship with two distinctive places, Tehran (my native land) and Arkansas (where I reside now). In my paintings and installations, I re-create intimate moments culled from my home and neighborhood in Iran. Due to a situation where I am far away from my homeland and not allowed to return without being forced to remain in Iran, I can feel my memories of home fading away. By utilizing memories from my past, I take aspects of images that are no longer recognizable and, therefore, are abstracted into …

The Physicochemical Properties Of Soy Protein Hydrolysate And Its Formulation And Stability With Encapsulated Probiotic, John Stricklin Edwards

Graduate Theses and Dissertations

Soy protein isolate (SPI) and probiotics can serve as a functional ingredient and beneficial supplement, respectively, to food formulations, but few studies focus on the compatibility of these two ingredients. The objective of this study was to prepare soy protein isolate (SPI) from defatted soybean flour and identify an optimal hydrolysis protocol to create soy protein hydrolysates (SPH) with improved solubility and functional properties and achieve an optimum encapsulation technique for probiotics and to determine the in vitro viability of encapsulated probiotic cells with SPH in a gastrointestinal environment. The SPI was prepared using an alkaline extraction procedure for solubility …

Extracting Social Network From Literary Prose, Tarana Tasmin Bipasha

Graduate Theses and Dissertations

This thesis develops an approach to extract social networks from literary prose, namely, Jane Austen’s published novels from eighteenth- and nineteenth- century. Dialogue interaction plays a key role while we derive the networks, thus our technique relies upon our ability to determine when two characters are in conversation. Our process involves encoding plain literary text into the Text Encoding Initiative’s (TEI) XML format, character name identification, conversation and co-occurrence detection, and social network construction. Previous work in social network construction for literature have focused on drama, specifically manually TEI-encoded Shakespearean plays in which character interactions are much easier to track …

The Cognition Of Controversy: Examining Policy Elites’ Narrative Cognition And Communication Around Hydraulic Fracturing Practices In The U.S., Rachael M. Moyer

Graduate Theses and Dissertations

The use of hydraulic fracturing (HF) technologies to extract oil and gas in the United States has sparked contentious policy debates, producing inconsistent and inefficient policies that have done little to address the impacts of HF in any comprehensive way. Debates are accompanied by competing policy narratives that position HF as either an environmental threat or an economic opportunity, but little is known about how policy narratives around HF are used by individuals. This dissertation systematically examines how individuals cognitively internalize elements of competing HF policy narratives. Organized into three empirical chapters, this dissertation analyzes narrative cognition (Jones, Shanahan, and …

A Phenomenological Study Of Students’ Advising Experiences In A Four-Year Centralized Advising Center, Nicole Rowan

Graduate Theses and Dissertations

The purpose of this study was to explore how undergraduate students experienced and understood academic advising within the context of a four-year centralized, primary role advising center at a public research university in the mid-south. This qualitative study included 13 undergraduate juniors or seniors from the liberal arts college of a large research university. Using phenomenological methods, I explored the lived experience of these students’ advising experiences through a series of focus groups and one-on-one interviews with the goal of understanding how academic advising impacted the students’ sense of connectedness to the university. Five themes emerged from these interviews: access …

An Evaluation Of Hybrid Traits, Yield, And Major Qtl Effect On Heterosis In Hybrid Soft Red Winter Wheat, Zachary James Winn

Graduate Theses and Dissertations

Wheat (Triticum aestivum L.) is a self-pollinating species that is most often bred as a recombinant inbred line. When two inbred individuals are crossed, they produce progeny which experience heterosis; heterosis is the increased robustness experienced due to the reintroduction of heterozygosity. Hybrid wheat may be produced through the use of chemical hybridization agents, yet the structure of wheat flowers decreases the efficiency of outcrossing. The objectives of this study were to: assess the amount of heterosis experienced by a population of hybrid wheat and observe the effect of major gene loci on yield and yield components, phenotype anthers extruded …

Characterizing Hydrothermal System Groundwater Dynamics Using Conservative And Non-Conservative Tracers: Insights And Implications Drawn From Study At The Taupo Volcanic Zone (New Zealand) And Valles Caldera (Usa), Joshua Michael Blackstock

Graduate Theses and Dissertations

Hydrothermal systems constitute an important component of heat and mass transport within Earth’s crust having direct and indirect impacts to society. Investigating contemporary hydrochemical differences and change are critical to evaluating and deconvolving factors that influence geothermal systems through time. In this dissertation, groundwater mixing approaches were used to study hydrochemical differences in two globally significant hydrothermal areas, which included fabrication of a low-cost dissolved CO2 monitoring for dissolved inorganic carbon (DIC). In the Taupo Volcanic Zone (New Zealand), empirical spatial relations were used to derive low-temperature groundwater end-members of Cl and Cl/Br for end-member mixing analysis (EMMA). Using EMMA, …

The Feedback-Related Negativity Is A Time-Dependent Brain Mechanism That Facilitates Aversive Learning: Implications For The Reinforcement Learning Frn Hypothesis, Eric Rawls

Graduate Theses and Dissertations

Organisms encode rewarding and aversive experiences through reinforcement learning, capitalizing on prediction errors (PEs), which adapt action strategies over time. Computational theories are explicit that PE signals should update action weights continuously over the course of a behavioral task, an important time-dependent variation that is eschewed in traditional neuroscience studies that average over large numbers of trials. I examined variation in reaction times and feedback-locked cortical activity over time as a function of PE to critically examine theories indicating that PE signals drive time-dependent learning. We recorded EEG while participants completed a novel reinforcement task that varied prediction error on …

Fractional Order State Feedback Control For Improved Lateral Stability Of Semi-Autonomous Commercial Heavy Vehicles, Rasheed Mazen Abdulkader

Graduate Theses and Dissertations

With the growing development of autonomous and semi-autonomous large commercial heavy vehicles, the lateral stability control of articulated vehicles have caught the attention of researchers recently. Active vehicle front steering (AFS) can enhance the handling performance and stability of articulated vehicles for an emergency highway maneuver scenario. However, with large vehicles such tractor-trailers, the system becomes more complex to control and there is an increased occurrence of instabilities. This research investigates a new control scheme based on fractional calculus as a technique that ensures lateral stability of articulated large heavy vehicles during evasive highway maneuvering scenarios. The control method is …

Investigating Egg Storage Conditions, Hatch Characteristics, And Feeding Methods Of Commercially Produced Poultry, Joshua R. Deines

Graduate Theses and Dissertations

Advancements in poultry research continue to add knowledge and understanding to an already technical industry. Such information has led to new developments in early feeding strategies which provide nutrients to broiler chicks while in the egg or during transport. This wealth of knowledge in poultry research extends beyond chickens and is utilized for other species, such as quail and pheasants, including how fertile eggs are stored and incubated. However, methods of early feeding broilers have not been investigated in industry relevant approaches to understand its effects, including how timing of feed access interacts with the hatch window. As well, quail …

Influencers Of Succession Planning Among Rural Community College Chief Executives, Ashley Aylett

Graduate Theses and Dissertations

The challenge of maintaining strong leadership within many community colleges has been exacerbated by many factors including demographic shifts, therefore, succession planning is one tool used by institutions to offset the challenge of dealing with aging leaders, retirements, and a limited pool of competent applicants. Many senior administrators have and will continue to retire at rapid rates and fewer well-prepared individuals seem to be available or willing to move into these roles. Higher education literature has explored the future of community colleges during this time of change, some examining critical factors for the future of community colleges by asking questions …

Evaluation And Analysis Of Null Convention Logic Circuits, John Davis Brady

Graduate Theses and Dissertations

Integrated circuit (IC) designers face many challenges in utilizing state-of-the-art technology nodes, such as the increased effects of process variation on timing analysis and heterogeneous multi-die architectures that span across multiple technologies while simultaneously increasing performance and decreasing power consumption. These challenges provide opportunity for utilization of asynchronous design paradigms due to their inherent flexibility and robustness.

While NULL Convention Logic (NCL) has been implemented in a variety of applications, current literature does not fully encompass the intricacies of NCL power performance across a variety of applications, technology nodes, circuit scale, and voltage scaling, thereby preventing further adoption and utilization …

A Phenomenology: Teachers Lived Experiences With Workplace English As A Second Language (Esl) Programs, Odilia Lineth Mitre Marciaga

Graduate Theses and Dissertations

This qualitative phenomenological study was designed to understand in-depth teachers lived experiences with workplace ESL programs. This study provides strategies and recommendations to improve the overall logistics of workplace ESL programs which can benefit the employer, the students, the institution, and the teachers. Strengthening the partnership and communication of all the parties can strengthen the program as whole as well. Data collection of the methodological process included in-depth face-to-face interviews with seventeen teachers during the summer of 2019.The data was managed and analyzed through initial and axial coding from which main themes emerged. Six key findings emerged from themes as …

A Geospatial Analysis Of Safety And Risk Perception In The Buffalo National River, Julie Nicole Terhune

Graduate Theses and Dissertations

In 1972, the Buffalo River in Arkansas became America’s First National River. Since then, the Buffalo National River has become a beloved recreational retreat for locals and visitors alike. The Buffalo National River is home to incredibly scenic views and host to many outdoor activities, among them, hiking and floating. As with any confluence of nature and humans, there is great risk involved in all aspects of the park. Between 2011 and 2017, a total of 140 search and rescue missions were carried out. Some were resolved easily, but more serious accidents were not unheard of.

Risk perception studies are …

Suitability Assessment For Integrated Urban Development In Makkah City Of Saudi Arabia, Mislat Alotaibi

Graduate Theses and Dissertations

Makkah – the third most populated city in Saudi Arabia with a population of 1,684,408 according to the 2010 demographic survey conducted by the Saudi General Authority for Statistics – is experiencing urban sprawl, which can be defined as an unplanned urban expansion that might degrade the environment and diminish the aesthetic view. This is a persisting problem in Makkah driven by multitude of processes involving the random expansion in its undeveloped land and the removal of its historic mountains surrounding Al-Masjid Al-Haram (the Holy Mosque) in an attempt to push the city limit of urban capacity within its administrative …

Retaining Special Education Teachers In A Rural Arkansas School District, Eric Ryan Gotte

Graduate Theses and Dissertations

According to published research, rural school districts across the United States are challenged with obstacles in recruiting and retaining special education teachers. This study presents findings based on special education teachers’ experiences teaching within one rural Arkansas school district. This instrumental single case study investigates the factors that encourage special education teachers to remain in their current position within a rural Arkansas school district. Qualitative data is analyzed from 11 participants, 9 current special educators, 1 special education director, and 1 retired special education teacher. All of the participants are from one rural Arkansas school district in order to gain …

Development Of A Text Message Stress Management Intervention And Its Impact On Perceived Stress And Coping Self-Efficacy Among Student Nurses, Kristin Jaye Henderson

Graduate Theses and Dissertations

Purpose: The purpose of the two studies was to develop a text message intervention and examine its effects on lowering perceived stress and increasing coping self-efficacy among nursing students. We also explored stress perceptions and investigated student satisfaction with the text message stress management program. Methods: For the first study, twenty three students participated in the focus groups for intervention development. Sample messages were presented to participants and feedback was requested. The messages were modified based on student feedback. The second study utilized an experimental pre/post design with a convenience sample (N=101) to examine the effects of the text message …