Digital Commons Network^™

Isolation And Characterization Of Bacteriophages From Fish Tank Samples, Oluwaseyi Oluwagbeminiyi Oladele-Ajose

Electronic Theses and Dissertations

Bacteriophages (phages) are viral obligate intracellular parasites that infect bacteria. Research has been carried out on alternative treatment plans for bacterial infections due to the increase in antibiotic resistance. Phages have been proposed as an alternative to antibiotics. This research focused on the isolation and characterization of bacteria from small aquariums. A total of 42 bacterial isolates were isolated from seven different fish tank water samples and were tested to determine if they possessed phages. Spot plaque assay revealed presence of lytic phage for only one of the isolated bacterial strains, which was determined to belong to Enterobacteriaceae family based …

Comparative Lineament And Geomorphic Analysis Of Chaotic Terrains And Noctis Labyrinthus, Mars, Sarah A. Walton

Electronic Theses and Dissertations

Noctis Labyrinthus (NL) is an extensional trough network connecting the Tharsis rise and Valles Marineris on Mars. Chaotic terrains are a group of polygonally-fractured surface features commonly associated with subsidence due to rapid fluid loss within the subsurface. Polygonal surface patterns are seen at both sites, where geometric topographic highs are bounded by low troughs. Lineaments, topography, and geomorphology of NL and chaotic terrains were analyzed to determine tectonics and fluid influence in the formation and evolution of both sites. NL shows preferential fracture patterns associated with regional extension. Lineaments within chaotic terrains do not show cumulative preferential trends but …

La Fiesta Del Espiritu Santo: An Original Work For Choir, Soloists, And Small Ensemble Influenced By The Santeria Music Of The African-Dominican Community In The Dominican Republic, Rafael Scarfullery

Electronic Theses and Dissertations

ABSTRACT

This study examines the role of Santería music as practiced by African Dominicans in Villa Mella, a neighborhood of Santo Domingo, Dominican Republic. This musical tradition comes from the culture and religion of the Yoruba people who were brought as slaves from Africa, and features complex drum rhythms and call-and-response chants. This paper deals with the historical and social context of Santería music within the Dominican Republic, but its principal objective is to adopt the musical language of this tradition and use it to create a new contemporary work for mixed choir and small ensemble.

One of the most …

Quantifying Current Soil Brine Contamination Within The Smackover Oil Field In Arkansas Using Multispectral Digital Imagery, Victoria Williams

Electronic Theses and Dissertations

A remote sensing study was performed to quantify current soil brine contamination across the historic Smackover Oil Field in south-central Arkansas, United States. The oil field was established in 1922 and was not subject to the future waste regulations created by the Arkansas Oil and Gas Commission. Brine is a waste product of oil manufacturing which contains water with high salt levels. The storage and transport of brine in the oil field created landscape scarring across the study area.

Landsat 9 multispectral digital imagery was utilized to create supervised classification maps based on earthen pits and creek scarring across the …

A History Of Complex Simple Lie Algebras, Avrila Frazier

Electronic Theses and Dissertations

In 1869, prompted by his work in differential equations, Sophus Lie wondered about categorizing what he called “closed systems of commutative transformations,” while around the same time, Wilhelm Killing’s work on non-Euclidean geometry encountered related topics. As mathematicians recognized this as a division of abstract algebra, the area became known as “continuous transformation groups," but we now refer to them as Lie groups.

Patterns and structures emerged from their work, such as describing Lie groups in connection with their associated Lie algebras, which can be categorized in many important ways. In this paper, we focus on Lie algebras over the …

Character Development And Revolution: Use Of Leitmotif In The First Acts Of Les Misérables And Hamilton: An American Musical, Mary Katherine Pezzillo

Electronic Theses and Dissertations

Leitmotif, a recurring musical theme that represents a character, idea, or situation, is a device used in operas, film scores, and musical theater. Accredited to Richard Wagner, leitmotifs enhance storytelling and provide a sense of cohesion to a production. The popular musicals Les Misérables and Hamilton bear many similarities, including the use of leitmotif as a storytelling device. This thesis explores how the two musicals use leitmotif differently, through the lens of the protagonists, antagonists, and supporting characters. Though the leitmotifs in Les Misérables generally represent ideas and the leitmotifs in Hamilton are mostly character-based, this tool aids the overall …

The Effects Of Covid-19 School Disruptions On Social, Emotional, And Behavioral Skills, Reggie N. Rios

Electronic Theses and Dissertations

School disruptions, closure of school buildings and online learning, in response to the coronavirus disease in 2019 (Covid-19) pandemic impacted students in unique ways (Azmat & Ahmad, 2022; Hosszu et al., 2022; Hussong et al., 2021; Patrick et al., 2020; Spitzer, 2020) and possibly had long-term effects on the social, emotional, and behavioral skills students normally establish and practice within the school setting (Steedly et al., 2008; Taylor & Larson, 1999; Zins et al., 2007). The lack of research related to the effects of school closures during the Covid-19 pandemic on social, emotional, and behavioral skills was addressed in this …

The Politics Of Preservation: Stewarding Artifacts In Archives, Kollynn Hendry

Electronic Theses and Dissertations

Kay Bailey Hutchison served Texas and the United States in many capacities during her political career. She vastly impacted Texas, as well as Nacogdoches, Texas in particular, through her time serving as a member of the Texas House of Representatives and as a United States Senator. In 2012, she donated her massive collection of gifts and memorabilia to the East Texas Research Center, a regional archive at Stephen F. Austin State University. The university honored her donation by creating a room to display the collection and interpret her influence on East Texas. Due to a rushed timeline, administrative interference, and …

Molecular Detection And Characterization Of Rickettsia Sp. In Hard Ticks Collected In Nacogdoches, Texas, Haley Nicole Standifird

Electronic Theses and Dissertations

The number of cases of tick-borne diseases is increasing in the United States. Many efforts to control ticks have been made and are continuously being developed. These methods include surveillance of ticks and detection of the tick-borne pathogens.This study examined hard ticks in Nacogdoches, Texas, to test for the presence of Rickettsia sp. 47 ticks were collected from vegetation by flagging and their species, sex, and developmental stage were determined using available keys. Individual ticks were processed for nucleic acid extraction and molecular detection of Rickettsia sp. using PCR-based methods. The citrate cynthease gene, 17kDa gene, and outer membrane protein …

The Behavior Assessment System For Children Third Edition (Basc-3)’S Classification Accuracy For Attention-Deficit/Hyperactivity Disorder (Adhd) In Young Adults, Angela Lafaye Lucas

Electronic Theses and Dissertations

Attention-Deficit/Hyperactivity Disorder (ADHD) was established as a condition initially considered to be outgrown; however, research later demonstrated that about one-half to two-thirds of children with ADHD had persistent symptoms into adolescence and adulthood (Resnick, 2005). It was estimated that the percentage of college-aged students with ADHD ranged somewhere between 2 and 8% (DuPaul et al., 2009). Assessing for an ADHD diagnosis determination in college student-aged individuals was a challenge that required strategies not typically used when assessing for other disorders or within different age ranges (Lovett & Davis, 2017). There was a lack of consistent strategies amongst clinicians on how …

Modifying The Composition Of A High Temperature Superconductor, Drue Lubanski

Electronic Theses and Dissertations

The purpose of this research was to recreate a known superconductor, YBa₂Cu₃O_x, and modify it in an attempt to raise its transition temperature. A superconductor is any material that excludes magnetic flux from its interior when at a temperature below its transition temperature. A “high temperature” superconductor refers to material that shows superconductivity at or above the temperature of liquid nitrogen temperatures (77.15K).

Here we were successful in reproducing the original YBa₂Cu₃O_x and measuring its critical temperature; However, our efforts at raising the transition temperature have, as of yet, …

Quantification Of Influential Surface Fuel Parameters In Fire-Prone Ecosystems Of The Netherlands, Lauren Lara

Electronic Theses and Dissertations

Changing climate conditions in northwest Europe present an increasing wildfire risk in the Netherlands. Focus on fuels monitoring in this region is not as extensive as it is in the United States. Accurate estimation of biomass fuel loading is integral to prevention of wildfires which pose a significant risk to both human lives and property. This research project attempted to create predictive models for three major fuel categories (litter/duff, shrub, and downed woody material). Reduction of the number of parameters to measure would streamline the process of fuel load estimation by reducing the number of measurements that need to be …

The Effects Of Transcranial Direct Current Stimulation (Tdcs) On Facial Expression Approach/Avoidance In College Students And Faculty With Broad Autism Phenotype, Nicole R. Baker

Electronic Theses and Dissertations

Transcranial Direct Current Stimulation (tDCS) has been proposed as an alternative noninvasive therapy for individuals with autism. This study trained brain activity in college students and / or faculty with Broad Autism Phenotype (BAP) while eye tracking data was collected. The purpose of this study was to determine if tDCS training to the frontal lobes could increase approach toward social interactions in adults classified as BAP as demonstrated by eye-tracking measures in response to faces and gaze fixation. The study included 21 total participants recruited from the Science, Technology, Engineering, and Math (STEM) courses / professions at a Regional East …

Effectiveness Of 2016 Watershed Protection Plan On Bacteria And Nutrient Concentration Loads In The Attoyac Bayou Watershed, Jack Henson

Electronic Theses and Dissertations

In 2004, bacteria and nutrient sampling on the Attoyac Bayou Watershed discovered elevated concentrations of E. coli on five of the main channels key tributary streams. The Attoyac Bayou was then listed on the Texas 303d list of impaired waterbodies and further research was conducted to identify the main sources of contamination in the waterbody. In 2016, the Attoyac Bayou Watershed Plan (WPP) was developed to implement best management practices (BMPs) that would decrease bacteria and nutrient concentrations in the watershed. Educational outreach programs, on-site-sewage facility repair, and livestock management were some of the strategies suggested by the protection plan …

Bioinformatic Analysis Of The Interaction Of Evc And Evc2 Proteins, Md Atikul Islam Mamun

Electronic Theses and Dissertations

Protein to protein interactions are significant to various biological processes, functioning, and the regulation of cells and organisms. Proteins perform essential cellular tasks and often work together in complexes, enabling specific functions like enzymatic activity, signal transduction, DNA replication, and cell division. These interactions are important in signaling pathways, allowing proteins to interact sequentially, leading to specific cellular responses. Some proteins rely on chaperones to fold correctly, and protein to protein interactions enhance stability, preventing degradation.

Researchers at Stanford University School of Medicine discovered that EvC syndrome is related to a malfunction in the Hedgehog (Hh) signaling pathway. They found …

Maladjustment Among Victims Of Bullying, Jack Bryant

Electronic Theses and Dissertations

Bullying has garnered attention from educators, social scientists, and the public at large for nearly 50 years, but the dilemma persists. We have seen that bullying is a high-risk factor for psychological adjustment across the lifespan. The current study has surveyed college students to ascertain their perceptions of adjustment in adult life. The study has added to the existing literature in addressing the role of reduced perceived control in the maladjustment of bully victims. A novel contribution was made by comparing the strength of this potential mediator to another documented correlate of poor adjustment among bullying victims, thwarted belonging.

Reservoir Characterization Of The Utica Shale Play Using Well Log Data In Columbiana, Ohio, Tyler L. West

Electronic Theses and Dissertations

The Ordovician Utica shale play is rapidly developing throughout the Appalachian Basin. The play is a mixed carbonate-siliciclastic system that grades from primarily carbonates at its base in the Lexington/Trenton limestones into primarily shale within the Utica shale. As of January 2021, it is the third highest-producing dry shale gas play in the contiguous U.S., although it is known to produce wet gas and oil in various parts of the basin. In addition to being an unconventional reservoir, the Utica shale, an informal unit in Ohio where the main fairway is located, is a known source rock for much of …

Analysis Of The Appointment, Experiences, And Job Satisfaction Of Leaders In Large Schools Of Music, Claire Murphy

Electronic Theses and Dissertations

Little is known about how male and female middle-level leaders in schools of music come into their leadership roles, how they distribute their time among responsibilities, and how the distribution of time or other factors impact their professional identities, creative activities, and job satisfaction. Quantitative, self-reported survey data collected on music leaders in large schools of music and qualitative data collected from a panel discussion with representative leaders were used to analyze the five research questions in this explanatory sequential mixed-methods study. An analysis of the relationship between the two variables, gender and method of entry, showed a weak association. …

An Analysis Of All-Cause Mortality On Patients With Sickle Cell Disease And Kidney Disease Using Propensity Score Matching, Adam Garrison

Electronic Theses and Dissertations

In this work, we provide an overview of the Cox proportional hazards model for time to event or survival analysis and the notion of propensity score matching to deal with confounding factors. A full analysis is reported in Chapter 2 concerning mortality for in-center dialysis patients with sickle cell disease to demonstrate the application of a general analysis strategy that has some logistical benefits over more traditional approaches to accounting for confounding variables. We also provide some insight and discussions on the challenges and future research questions that will emerge when trying to implement this strategy as a monitoring tool …

Blockchain Security: Double-Spending Attack And Prevention, William Henry Scott Iii

Electronic Theses and Dissertations

This thesis shows that distributed consensus systems based on proof of work are vulnerable to hashrate-based double-spending attacks due to abuse of majority rule. Through building a private fork of Litecoin and executing a double-spending attack this thesis examines the mechanics and principles behind the attack. This thesis also conducts a survey of preventative measures used to deter double-spending attacks, concluding that a decentralized peer-to-peer network using proof of work is best protected by the addition of an observer system whether internal or external.

The Great Unlearning, Catherine Mccrory Pears

Electronic Theses and Dissertations

The Great Unlearning is a conceptual exploration: sifting through experiences and objects to overcome psychological pain, expectations of society, individual upbringing, and outside influences in an ongoing quest for authenticity. To both embrace personal history and honor loved ones while letting go of lingering negativity is challenging. Using objects culled from my life, examining the past, and incorporating items gathered along my path through nature, the work seeks personal healing while promoting the power of all people to break from indoctrination, group think, and mob mentality to make better choices to live a satisfying and peaceful existence…hopefully in a democratic …

Perception Of Alumni Of The Department Of Agriculture At Stephen F. Austin State University, Sherifat Rufai

Electronic Theses and Dissertations

University alumni surveys have served various purposes since they were introduced in the 1930s in the United States. The Department of Agriculture at Stephen F. Austin State University (SFASU) aimed to evaluate alumni perceptions between the Fall of 2010 and the Spring of 2022 to provide an opportunity to examine the relationship between degree fields and occupations and the agriculture curriculum, salaries, and demographic data for college graduates. This study's web-based survey was designed to include closed-ended and open-ended questions to collect individual opinions using Qualtrics Survey Software. The survey materials were made available on the alumni's social media accounts. …

Making Malice Musical: Verdi’S Compositional Journey Through The Eyes Of Six Villains, Michael Chadwick

Electronic Theses and Dissertations

Giuseppe Verdi is a pillar of the operatic world and had a profound impact on the evolution of the art form. From a rudimentary beginning, he developed over time from a popular creator of operas in the solita forma style of 19^th century Italy into a master craftsman of combining music, text, and theatrical drama. Verdi utilized the popular compositional formal convention of solita forma to begin his career. Over time he evolved beyond its boundaries and shifted his focus to the holistic theatrical presentation of the drama. Much has been written about this evolution through analysis of Verdi’s …

Characterization Of Molecular Content, Cytotoxicity, And Anti-Inflammatory Activity Of Extractions From Eupatorium Serotinum, Jordy Sloan

Electronic Theses and Dissertations

Inflammation is a complex and varied immune response which can be expressed chronically or as a temporary reaction to foreign invaders. Symptoms of inflammation include swelling, pain, soreness, and difficulty of motion. Recently, the effect of sesquiterpene lactones such as Helenalin from Arnica montana have been studied for their anti-inflammatory properties. In this study, we identified and harvested samples of Eupatorium serotinum, a plant historically used by Native Americans to treat a variety of medical illnesses. Crude extracts of the leaves, flowers, roots, and stems were prepared by ethanol extraction. The cytotoxicity of the different extracts on HEK293 cells …

Restrictions On Topological Symmetry Groups Of The 3-Rung Möbius Ladder On The Torus, Logan Willhoite

Electronic Theses and Dissertations

In this work, we discuss properties of the 3-rung Möbius ladder embedded on the surface of a torus. We present proofs on restrictions of topological symmetry groups of the Möbius ladder with and without the assumption of preserving orientation. Specifically, we show that Z₂ is the only possible non-trivial orientation-preserving topological symmetry groups, and also that Z₂ and D₂ are the only possible nontrivial topological symmetry groups.

The Impact Of Couple Minority Stress And Perceived Relationship Equity On Relationship Satisfaction Of Women In Same-Gender Relationships, Rebekah Malott

Electronic Theses and Dissertations

The purpose of this study was to test two hypotheses (H1: relationship satisfaction will mediate the relationship between perceived relationship equity and potential relationship dissolution in women in same-gender relationships. H2: Relationship satisfaction will mediate the relationship between perceived minority stressors and potential relationship dissolution in women in same-gender relationships). Participants who met the demographic profile and consented to the study were asked to complete five questionnaires: relationship equity (Kurdek, 1998), couple minority stress (Neilands et al., 2019), relationship satisfaction (Funk & Rogge, 2007), potential relationship dissolution, and demographics. The results showed that relationships satisfaction was a partial mediator between …

Peer Perceptions Of Parent-Students Seeking Higher Education, Alexandria Wall

Electronic Theses and Dissertations

With a growing number of parents pursuing academia, it is imperative that researchers understand the social environment in which parent-students function. Stereotypes of parent-students may be held by peers, faculty, and other educational supervisors. Across two previous independent studies, evidence and rationale were provided to suggest that both positive and negative perceptions of parent-students exist, with noted differences between gender. The purpose of the current 2x2x2 between-subjects study was to analyze the social perceptions of students enrolled in higher education as varied by parenthood status, age, and gender. The social perceptions included measures accounting for perceptions of intelligence and academic …

The Future Is Now In Twisted Coil Polymer Actuators (Tcpa), Ryan Ronquillo

Electronic Theses and Dissertations

This thesis aimed to fabricate and test twisted coiled polymer actuators (TCPA) to understand the mechanical and thermal aspects of this artificial muscle fiber. The purpose of this thesis was to find a linear relationship using the LVDT sensor, fabricating TCPA fibers, and interpreting the data. The project tested whether nylon/polymer could be used as a better artificial muscle fiber.

This research accomplished three goals: (1) designing and fabricating a system capable of creating supercoiled muscle fibers consistently, (2) calibrating the Linear Variable Differential Transformer (LVDT) and Core, and (3) analyzing/interpreting the data of the Twisted Coiled Polymer Actuators (TCPA) …

Dolphin Behavioral Responses To Uncrewed Aerial Systems As A Function Of Exposure, Height, And Type, Savannah Damiano

Electronic Theses and Dissertations

Uncrewed aerial systems (UAS) are becoming a standard tool in the study of cetaceans, however, a comparative assessment of animal responses to UAS has not been established to gauge the most effective systems for cetacean study. We utilized Dolphin Quest Bermuda’s eleven bottlenose dolphins as subjects for such an investigation taking place over five weeks in 2022 and five weeks in 2023. The dolphins were evaluated for investigative behavioral responses to six off-the-shelf UAS types and a custom fixed wing system. Each UAS was flown in decreasing height vertically above the main dolphin lagoon to evaluate dolphin behavioral responses in …

Identifying And Analyzing Multi-Star Systems Among Tess Planetary Candidates Using Gaia, Katie E. Bailey

Electronic Theses and Dissertations

Exoplanets represent a young, rapidly advancing subfield of astrophysics where much is still unknown. It is therefore important to analyze trends among their parameters to learn more about these systems. More complexity is added to these systems with the presence of additional stellar companions. To study these complex systems, one can employ programming languages such as Python to parse databases such as those constructed by TESS and Gaia to bridge the gap between exoplanets and stellar companions. Data can then be analyzed for trends in these multi-star exoplanet systems and in juxtaposition to their single-star counterparts. This research was able …