Digital Commons Network^™

Process Evaluation And Kinetic Analysis Of 3d-Printed Monoliths Comprised Of Cao And Cr/H-Zsm-5 In Combined Co2 Capture-C2h6 Oxidative Dehydrogenation To C2h4, Khaled Baamran, Shane Lawson, Ali A. Rownaghi, Fateme Rezaei

Chemical and Biochemical Engineering Faculty Research & Creative Works

In this study, dual-function materials (DFMs) comprised of CaO and Cr/H-ZSM-5 were formulated in 3D-printed monolithic structures and investigated in a combined process for capture and utilization of CO₂ in oxidative dehydrogenation of C₂H₆ to C₂H₄ (CO₂-ODHE). Various formulation strategies were employed to fabricate these DFM structures. Two bed designs were considered: i) a layered-bed in which adsorbent (CaO) and catalyst were printed separately and stacked on top of each other, and ii) a single-layer bed where the adsorbent-catalyst materials were 3D-printed into a singular monolith and loaded into the bed …

Random Trilobe Packing Using Rigid Body Approach And Local Gas-Liquid Hydrodynamics Simulation Through Cfd With Experimental Validation, Binbin Qi, Sebastián Uribe, Omar Farid, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

It is quite difficult to measure the local information of the gas/liquid flow inside random packed extrudate catalyst beds in a large scale. Obtaining the local information through computational fluid dynamic (CFD) simulations in such system is also difficult due to the complexity of random particle packing and two-phase flow simulation. An efficient packing scheme was implemented to randomly pack 2917 trilobe particles (10 cm in height) in a 2-inch column to represent the trickle bed reactor (TBR) based on the rigid body approach. The generated geometry was used to define the computational domain for the two-phase hydrodynamics simulation based …

Liquid And Solids Phase Backmixing In A Bubble And Slurry Bubble Column Using A Virtual Tracer Response Methodology Based On The Trajectory Data Of The Radioactive Particle Tracking (Rpt) Technique, Lu Han, Premkumar Kamalanathan, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

Virtual tracer response methodology developed based on the trajectory data of the computer aided radioactive particle tracking (CARPT) technique was demonstrated. The demonstrated virtual tracer technique has advantages of non-invasiveness, near perfect injection/sampling, and flexibility in choosing the sampling/injection boundaries in a specific spatial pattern. With the developed virtual tracer technique, liquid and solids back mixing was investigated at the conditions mimicking Fischer-Tropsch synthesis. Experiments were conducted at different pressure, solids loading, and superficial gas velocity. The axial dispersion model (ADM) and recirculation and cross flow dispersion (RCFD) models were used to model the liquid mixing. Transient sedimentation dispersion model …

Review Of Biomechanical Studies And Finite Element Modeling Of Sternal Closure Using Bio-Active Adhesives, Amatulraheem Al-Abassi, Marcello Papini, Mark R. Towler

Chemical and Biochemical Engineering Faculty Research & Creative Works

The most common complication of median sternotomy surgery is sternum re-separation after sternal fixation, which leads to high rates of morbidity and mortality. The adhered sternal fixation technique comprises the wiring fixation technique and the use of bio-adhesives. Adhered sternal fixation techniques have not been extensively studied using finite element analysis, so mechanical testing studies and finite element analysis of sternal fixation will be presented in this review to find the optimum techniques for simulating sternal fixation with adhesives. The optimal wiring technique should enhance bone stability and limit sternal displacement. Bio-adhesives have been proposed to support sternal fixation, as …

The Occupational Therapy Approach To Pain Treatment: A Pain Curriculum, Rosalee Howell

UNLV Theses, Dissertations, Professional Papers, and Capstones

It is within the scope of the occupational therapy profession to treat patients experiencing pain. The holistic approach used to assess and treat patients to improve functional performance is vital in treating pain. The focus is to decrease the detrimental impact of pain on the patient’s mental health, enhancing their ability to function in social and vocational roles. However, education is not adequately addressed in occupational therapy programs and is vital in preparing clinicians to meet the patient’s needs effectively.

This Doctoral Capstone was developed to highlight the importance and the benefit of education in preparing clinicians to treat patients …

A Parent-Mediated Intervention To Teach A Generalized Repertoire Of Auditory Tacts To A Child With Autism, Hazim Aal Ismail

UNLV Theses, Dissertations, Professional Papers, and Capstones

Tact is the most important verbal operant (Skinner, 1957) due to the uniqueness of stimulus control and its role in facilitating acquisition of another verbal (e.g., mands, intraverbals) and nonverbal (i.e., listener) operants (Sundberg, 2015). Teaching tacts to children with ASD and the research on this area, however, are largely focused on visual stimuli. Teaching tacts of auditory stimuli to children with ASD is important as they constantly experience various auditory stimuli (e.g., vehicles, pets, machines, music) in the natural environment. Adding auditory and other nonvisual tacts to tact repertoire increases its effectiveness (Sundberg & Partington, 1998). Furthermore, teaching auditory …

Developing Vocal Agility Of Light Lyric Coloratura Soprano Voices Through The Neglected Repertoire Of French Opéra Comique, Valentine Baron

UNLV Theses, Dissertations, Professional Papers, and Capstones

This document explores light lyric coloratura soprano roles in the French opéra comique genre through an analysis of seven arias and their impact on the development of vocal agility. The opéra comique genre was popular at the beginning of the eighteenth century, but declined to disappear from the stage at the end of the nineteenth century. Despite the opéra comique’s influence on many other vocal genres, the genre is today neglected. Opportunities for singers to improve and practice challenging coloratura in this repertoire are limited. The two most famous arias from the genre which are the Doll Aria and Juliette’s …

The Experiences Of Pell Grant Students Who Lose Aid: A Mixed Methods Study, Jaime Carbajal, Jr.

UNLV Theses, Dissertations, Professional Papers, and Capstones

Understanding the link between financial aid and college attainment is particularly important for the Federal Pell Grant program, the nation’s largest financial aid program. Many studies have shown that the Pell Grant program increases retention, persistence, and graduation rates for undergraduate students (Castleman & Long, 2016; Evans & Nguyen, 2019). Nonetheless, 80% of Pell recipients do not go on to complete a college degree within four years (Goldrick-Rab et al., 2016). One possible reason for this outcome is the way the Pell Grant program is constructed and implemented. While the Pell grant starts out as a need-based aid, it becomes …

A Performer’S Guide To Richard Danielpour’S Spirits In The Well: A Cycle Of Four Songs For Soprano And Piano With Lyrics By Toni Morrison, Christina Louise Chenes

UNLV Theses, Dissertations, Professional Papers, and Capstones

Richard Danielpour’s (b.1956) song cycle Spirits in the Well (1998) uses four poems penned by Toni Morrison (1931-2019), specifically for Danielpour’s musical setting. Spirits in the Well remains virtually unknown to the general public and artists, as it has never been professionally recorded, despite having been frequently performed by famed soprano Jessye Norman (1945-2019). This document introduces singers to Spirits in the Well by offering a performance guide to the song cycle; it presents information on the text, musical style, structure, form, technical vocal challenges, and dramatic demands that this work places on a singer. Brief background information is provided …

Queens Of Discourse: An Observation Of Black Insta-Comediennes, Naoka Foreman

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study observed the ways Black females on Instagram perform sociopolitical humor online to push back against the dominant culture in this digital age – maintaining the Black comedy tradition. It explores and illuminates the strategies of resistance exhibited by Instagram comediennes through a textual analysis informed by minor discourse, intersectionality, and critical feminist theories. Each comic’s personae were investigated and their content on Instagram was randomly selected and coded then grouped into themes. Black insta-comediennes shared Black feminist thought, modified beliefs about Black females or conventionality, and negotiated with the industrial demands of show business to earn subjectivity on …

“Who Says Lowriders Are Only For Men?”: Lowriders In Las Vegas, Nevada, Alejandra Herrera

UNLV Theses, Dissertations, Professional Papers, and Capstones

Since its creation, Las Vegas, Nevada, has been associated with casinos, nightlife, drinking, and neon lights. Las Vegas is not associated with Lowriders. Historically, lowrider vehicles are associated with crime, gangs, and male drivers. When lowriding comes to mind, Lowriders are associated with major cities in California, Texas, New Mexico, Arizona, and Colorado. Lowriders are not usually visualized as having female participants or as being present in Las Vegas. This thesis highlights members of the Lowrider community (especially Christal Leyva, Ivelys Franco, and Juanita Salazar) through the use of oral interviews and personal correspondence. The Lowriders interviewed for this thesis …

Positive Solutions To Semilinear Elliptic Equations With Logistic-Type Nonlinearities And Harvesting In Exterior Domains, Eric Jameson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Existing results provide the existence of positive solutions to a class of semilinear elliptic PDEs with logistic-type nonlinearities and harvesting terms both in RN and in bounded domains U ⊂ RN with N ≥ 3, when the carrying capacity of the environment is not constant. We consider these same equations in the exterior domain Ω, defined as the complement of the closed unit ball in RN , N ≥ 3, now with a Dirichlet boundary condition. We first show that the existing techniques forsolving these equations in the whole space RN can be applied to the exterior domain with some …

Assessment Of Oral Human Papillomavirus In Pediatric And Adult Patients Within A Multi-Ethnic Clinic Population, Melissa Kornhaber

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Human papillomavirus (HPV) encompasses a large family of oncogenic viruses responsible for increasing rates of both cervical and oral cancer, particularly among minority and low-income populations. Although this represents an increasingly significant public health risk, few studies have screened for oral HPV within Nevada. Based upon this information, the primary objective of this study was to provide a temporal analysis of oral HPV screening among a primarily low-income, minority patient population.

Methods: This retrospective analysis was reviewed and approved by the Institutional Review Board (IRB). In brief, unstimulated saliva samples were previously obtained from clinical patient volunteers that provided …

What Connects Us: A User Experience Frame Analysis Comparison Of Secular And Religious Online Dating Sites, Alexa L. Miller

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study uses a frame analysis comparison of the website design of secular and religious online dating websites and how these design choices may shape users’ self- presentation. Literature is reviewed regarding the history of dating in secular, religious, and online contexts, self-presentation within Goffman’s The Presentation of Self in Everyday Life, and user-experience design patterns. Methodology explored a user-experience frame analysis of the initial boarding experiences navigating the presentation (homepage) and interaction features (profile-building page) on three dating sites (two secular, Tinder and Bumble, and one religious, Christian Mingle). Frames analyzed were Options, Fun, Safety, and Control based on …

An Educational Intervention In The Emergency Department For Adults Experiencing Vaso-Occlusive Crisis, Chericka S. Reese-Martin

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Sickle cell anemia, often referred to as sickle cell disease (SCD), is an inherited blood disorder that affects millions of people globally and affects more than 100,000 Americans, mostly of African or Hispanic descent. The SCD arises from a genetic defect that alters the structure of hemoglobin. The modified hemoglobin causes red blood cells (RBCs) to become stiff, sticky, and sickle shaped. These deformed RBCs block blood flow, cause severe pain, organ and joint damage and strokes. The sickled cells do not deliver oxygen to organs and tissues as healthy cells do, causing slow, inevitable damage over decades and …

Chimaera: A Collection, Robert Ren

UNLV Theses, Dissertations, Professional Papers, and Capstones

Chimaera is a collection of short stories as well as excerpts from a novel in progress, Cassandra & Charon. While this collection bears some resemblance to a short story cycle, these selections are not intended to be published together outside of this dissertation. Nevertheless, this dissertation features these selections side by side as these stories and chapters overlap thematically and consequently create resonances that would not exist otherwise. The short stories predominately feature Chinese American characters often as outsiders or third parties to other relationships. Other stories also feature retellings of classic stories including Goldilocks, Snow White, and Dracula, at …

Consumers Of Sex, Romance And The Spectacle: An Ethnographic Study Of Female Tourists In Bangkok’S Adult Entertainment Zones, Jason H. Scott

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research is an ethnographic study of female sex tourism in Bangkok, Thailand and explores how women, as consumers, participate in activities and spaces that were historically reserved for male tourists. Much of the existing scholarly literature investigates the way men from the global North participate in sex tourism practices. Very little attention, however, has been given to the way female tourists engage as consumers in the global sex tourism industry. Studies conducted in the Caribbean suggest that sexual consumption practices among female tourists are dichotomously different from men because of traditional gender roles and sexual scripts. To guide this …

Predicting The Progression Of Diabetes Mellitus Using Dynamic Plantar Pressure Parameters, Mathew Sunil Varre

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Diabetic peripheral neuropathy is one of the common complications of type-2 diabetes mellitus (DM). Changes in the intrinsic plantar tissue coupled with repetitive mechanical loads and loss of sensation may lead to foot related complications (skin break down, ulcerations, and amputations) in persons with neuropathy if left untreated. The purpose of this dissertation was to stratify individuals with pre-diabetes, diabetes with and without neuropathy using dynamic plantar pressure parameters during walking, using machine learning algorithms.Methods: Plantar pressure data was collected from one hundred participants during walking with pressure measuring insoles fixed between the feet and thin socks. Simultaneously high-definition …

Rural Embodiments Of Femininity: An Autoethnographic Approach To Gender Narratives, Randi Wichman

Boise State University Theses and Dissertations

The socialization one experiences throughout their lifetime informs their communication behaviors with others around them. Coming of age in a rural, Westernized geography instilled in me a unique sense of femininity that was constructed to complement the narratives significant to the cultural context of Rural America. This research discusses multiple dominant and marginalized forms of gender and these identities’ relationships to the gendered experiences that I had growing up in rural Montana. This autoethnography is composed of narrated experiences, pre-teen assessments, and poetic descriptions of the disciplining I was confronted with throughout my childhood in my small, ranching community. I …

Literacy Instructional Coaching In The Realm Of Writing: An Examination Of Writing Coaching Practices In Grades K-6, Jadelyn Abbott

Boise State University Theses and Dissertations

Due to the lack of focus on writing in teacher preparation programs and in-service professional development, teachers often feel unprepared to teach writing. One way to mitigate these feelings is through the use of literacy instructional coaches. Literacy instructional coaches are specialists who collaborate with teachers to help them develop specific skills, knowledge, and dispositions related to literacy instructional practices and students’ literacy performance. Existing research indicates that teachers who receive instructional coaching are more likely to use research-based practices, however, research on writing coaching is minimal. This three-study dissertation explores how literacy coaches are supporting and influencing teachers in …

Normalization Of Virtual Home Visiting In Idaho, Ashtin Glodt

Boise State University Theses and Dissertations

Background

Home visiting pairs expectant parents and those with young children with an early childhood professional who builds a long-term relationship with each family by regularly meeting with them in their homes and providing knowledge and skills that supports both parent and child health and well-being. In spring 2020, due to the COVID-19 pandemic, home visitors had to quickly transition from exclusively in-person services to virtual services, which created new challenges and opportunities.

Aim

To explore (1) the degree to which virtual home visiting practice has been normalized, as defined by Normalization Process Theory, by home visitors in Idaho, (2) …

Lexglue: A Benchmark Dataset For Legal Language Understanding In English, Ilias Chalkidis, Abhik Jana, Dirk Hartung, Michael Bommarito, Ion Androutsopoulos, Daniel Katz, Nikolaos Aletras

Research Collection Yong Pung How School Of Law

Lawsandtheirinterpretations, legal arguments and agreements are typically expressed in writing, leading to the production of vast corpora of legal text. Their analysis, which is at the center of legal practice, becomes increasingly elaborate as these collections grow in size. Natural language understanding (NLU) technologies can be a valuable tool to support legal practitioners in these endeavors. Their usefulness, however, largely depends on whether current state-of-the-art models can generalize across various tasks in the legal domain. To answer this currently open question, we introduce the Legal General Language Understanding Evaluation (LexGLUE) benchmark, a collection of datasets for evaluating model performance across …

A Co-Evolutionary Approach To Test Case Generation For Safety-Critical Systems, Brad Thomas Costa

Theses and Dissertations

Safety-critical software development is a costly and time-consuming process that involves thousands of hours dedicated to test development. Tests must meet stringent developmental guidelines to verify the correct and complete implementation of their parent requirements. Further compounding any such effort is the tendency towards requirement churn or the frequent change to the software and other system requirements. This thesis presents a solution, PyTcGen, that alleviates these challenges by processing natural language requirements and programmatically generating the requisite test cases to ensure the software meets all of the conditions of that requirement. The solution uses template matching to marry requirements to …

Assessing Nutritional Health Knowledge In Sharing Clinic Patients With Diabetes, Minden Huntrods

Capstone Experience: Master of Public Health

Effective diabetes prevention and management relies on nutritional behaviors, thus a basic level of health knowledge is important for patients with diabetes and their caregivers in their quest to acquire acute glycemic control and minimize negative health outcomes (Ley et al., 2014). The purpose of this study was to assess the nutrition-related health knowledge of patients living with diabetes who are seen at the UNMC Sharing Clinic by use of a verbal questionnaire. This nutritional health knowledge assessment was a quantitative, prospective, survey-based study utilizing descriptive statistics. Approximately 86% of patients were proficient in food group and nutritious foods knowledge …

Assessing Meat Processing Workers’ Attitudes And Concerns Regarding Covid-19 Vaccination, Karen Schmeits

Capstone Experience: Master of Public Health

The COVID-19 pandemic has impacted industries across the globe. Specifically, for meat processing (meatpacking) facilities, the pandemic has changed the way facilities operate, how the workers perform tasks, and how workers perceive their health. The development of an FDA approved COVID-19 vaccine brought hope to meat processing employers and workers. However, little research has been conducted to know how meat processing workers feel about vaccines generally and how they perceive the COVID-19 vaccine. The purpose of this cross-sectional study was to investigate preventive vaccine determinants and attitudes and concerns specifically regarding the COVID-19 vaccine. Surveys were conducted with 128 meat …

Interventional Radiology Procedures Without Sedation: The Nurse Experience, Catherine De Leon

Dissertations

Background: Many IR procedures offer a less invasive and economical alternative to some open or laparoscopic surgeries. Patients undergoing a procedure without moderate sedation are awake, alert, with heightened sensory perceptions, and vulnerable to their surroundings. There is a gap in the current body of literature relating to the IR nurse’s experience of caring for patients during procedures without the use of moderate sedation.

Purpose/Aims: The purpose of this study was to explore the lived experience of Interventional Radiology (IR) nurses caring for conscious patients undergoing a procedure without the use of sedation. This phenomenological study aimed to describe the …

Mechanisms Of Mir-3189-3p-Mediated Inhibition Of C-Myc Translation In Triple Negative Breast Cancer, Cecilia Vittori, Duane Jeansonne, Hassan Yousefi, Celeste Faia, Zhen Lin, Krzysztof Reiss, Francesca Peruzzi

School of Medicine Faculty Publications

Background: Triple negative breast cancer (TNBC) is an aggressive subtype of breast cancer characterized by the lack of estrogen receptor, progesterone receptor, and HER2. Our lab previously characterized miR-3189-3p as a microRNA with potent anti-cancer activity against glioblastoma. Here, we hypothesized a similar activity in TNBC cells. As miR-3189-3p is predicted to target a variety of RNA binding proteins, we further hypothesized an inhibitory effect of this miRNA on protein synthesis. Methods: MDA-MB-231 and MDA-MB-468 cells were used to investigate the effect of miR-3189-3p on cell proliferation, migration, and invasion. TGCA database was used to analyze the expression of miR-3189-3p, …

Examining Best Practices For Urban Secondary School English As A New Language Teachers After The Passing Of The Commissioner’S Regulations Subpart 154.2 In New York State To Improve English Language Learner Students’ Academic Performance And Graduation Outcomes, Susanna Brown Cook

Education Doctoral

This purpose of this study was to examine the ways Commissioner’s Regulation Subpart 154.2 (CR Subpart 154.2) directly influenced seven seasoned secondary school English as a new language (ENL) teachers and their English language learner (ELL) students. Specifically, this study explored how the ENL teachers changed their pedagogy, instructional practices, and role as advocates since the implementation of CR Subpart 154.2. Utilizing Freire’s banking concept of education as a theoretical lens, the research was conducted using a qualitative descriptive methodology and semi-structured interviews. Findings were coded and interpreted to reveal the ENL teachers’ experiences with curricular changes prior to and …

How Hotel General Managers Develop Leadership And Managerial Competencies: A Phenomenological Study, Chloe Williams

Education Doctoral

For years hospitality industry professionals have demanded that those entering the field of hospitality possess the skills and competencies required to stay competitive (Chung-Herrera et al., 2003; Jiang & Alexakis, 2017; Johanson et al., 2011). Yet, higher education hospitality programs are criticized for becoming out of touch with the competencies needed in the hospitality industry (Chung, 2000; Jiang & Alexakis, 2017; Johanson et al., 2011). The purpose of this phenomenological study was to explore how hotel general managers acquired leadership competencies that contributed to them becoming a successful hotel general manager in the Northeast United States.

Four themes emerged from …

Will Millennials Be The Next Generation Of Virtual Team Members And E-Leaders: A Hypothesis Testing Study, Eduard C. Visagie

Education Doctoral

This study (a) identifies the characteristics and competencies of effective virtual teams, e- leaders, and the millennial generation, and (b) surveyed members of organizations located in the United States to evaluate if these American workers ascribe the research- based characteristics and competencies of effective virtual team members and e-leaders to professionals of the ever-growing millennial generation. This quantitative non- experimental comparative design study surveyed 1,050 Amazon Mechanical Turk (Mturk) workers who were (a) at least 26 years old; (b) employed or retired; (c) spoke or fully understood the English language; (d) lived and worked in the United States; and (e) …