Digital Commons Network^™

Computational Sodium Heat Pipe Simulation In Three Dimensions For Transient Nuclear Reactor Analysis With Variable Surface Heat Flux, Valerie Jean Lawdensky

UNLV Theses, Dissertations, Professional Papers, and Capstones

Heat pipes are used to transfer heat through phase change in a liquid/vapor contained in a metal tube. They are passive devices that require no pumps to circulate the fluid and can transfer heat far more efficiently than a solid copper rod of the same diameter. They are commonly used in laptop computers where copper heat pipes filled with water take heat away from the CPU and transfer the heat to air through a heat exchanger. Heat pipes were also used in the Kilopower nuclear reactor where higher temperatures required sodium as the working fluid with stainless steel tubes. Computer …

Exploring Treatment Targets To Mitigate Fear Of Falling Activity Avoidance Behavior In Parkinson's Disease And Older Adults, John Vincent Rider

UNLV Theses, Dissertations, Professional Papers, and Capstones

Fear of falling (FOF) is a significant concern among individuals with Parkinson’s disease (PD) and older adults in general. This FOF can lead to avoidance behavior resulting in activity restriction. Some level of fear of falling avoidance behavior (FFAB) may be protective (adaptive) and decrease the likelihood of falls, especially among individuals with physical limitations and high fall risk. However, excessive (maladaptive) avoidance behavior may lead to downstream consequences such as further physical and psychological decline and an increased likelihood of falls, especially when there is a disparity between the FFAB and physiological fall risk. While poor physical functioning, disease …

Monitored Compression Therapy: Using Smart Technology To Optimize The Treatment Of Lower Extremity Swelling, James Skelly

UNLV Theses, Dissertations, Professional Papers, and Capstones

Chronic Venous Insufficiency (CVI) and Venous Stasis Ulcers (VSUs) are symptoms which stem from diabetes – a disease effecting over 34 million people in the United States alone as of 2020. This Thesis details the design of a pressure-sensing garment used to enhance the treatment of CVI. The garment uses small force sensors (four levels: the insole of the foot, the lower leg, the lower calf, and the upper calf) to sense the pressure applied by a compression stocking. The sensed data is transmitted wirelessly via Bluetooth to a smartphone application that was developed to display the data and interface …

The Concept Album As Postmodern Literature: A Critical Examination Of Nine Inch Nails' The Downward Spiral, Kelly E. Stith

UNLV Theses, Dissertations, Professional Papers, and Capstones

With the humanities becoming progressively more open to interdisciplinary studies, there exists a space for music to be part of the discourse surrounding literature. One of the most important developments for music was the rise of the concept album, a medium where the individual tracks are defined by a larger theme or a unifying narrative. The concept album first emerged in the 1960s and became a method for musicians to experiment with expanded storylines and lyrical motifs that overthrew classical models of music albums. One of the most

influential concept albums, Nine Inch Nails’ The Downward Spiral, which came out …

What Do General And Organic Chemistry Students Consider When Making Decisions About Acids And Bases? A Phenomenographic Study, Sarah Wood

UNLV Theses, Dissertations, Professional Papers, and Capstones

Chemistry students often struggle in organic chemistry courses. In fact, these courses are viewed by some as “weed-out” classes. There are many fundamental concepts covered in general chemistry that contribute to students’ ability to succeed in organic chemistry. One of those fundamental topics, and the focus of this study, is the topic of acids and bases. Acid–base topics are featured in both general and organic chemistry courses, and the interests of this study lie not only within the realm of organic chemistry but also general chemistry.

The purpose of this study was to determine both undergraduate general and organic chemistry …

The Optimum Performance Program In Sports - Youth: A Case Study, Karolyne Bastos Stucki

UNLV Theses, Dissertations, Professional Papers, and Capstones

Ethnically and racially diverse youth athletes underutilize mental health services, resulting in social and economic costs to society (Gudiño et al., 2008; Snowden & Yamada, 2005). Almost half of all children and adolescents participate in sport, and sport participation is especially common in youth from ethnically and racially diverse neighborhoods (Holt, 2008; NSCH, 2017). Therefore, sport may be an effective strategy to permit diverse youth to receive mental health services. The current case study examines The Optimum Performance Program in Sports (TOPPS; a sport-specific family behavior therapy) in an Asian American youth athlete evidencing Social Anxiety Disorder (DSM-5). A within …

Preparation To Performance: A Conductor’S Journey To The Podium, Geoffrey B. Neuman

UNLV Theses, Dissertations, Professional Papers, and Capstones

The journey to the podium for a successful music educator that conducts performing ensembles requires a strong methodology steeped in score study, rehearsal planning, repertoire selection, musicianship skills, performance skills, and administrative duties. At the beginning of a career, educators often find themselves lacking the high level skills necessary to become a successful educator on the podium. This is often due to the many non-conducting requirements needed to complete the degree. Once a position is secured and professional life begins, these skills are often not fully developed. This then results in the music educator lacking the qualities needed to prepare …

Designs And Outcomes Of Transcranial Magnetic Stimulation (Tms) And Repetitive Transcranial Magnetic Stimulation (Rtms) Circuits, Daniel Senda

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis reports the design and outcomes of several circuits intended for transcranial magnetic stimulation (TMS) and repetitive transcranial magnetic stimulation (rTMS) research. In simple terms, TMS circuits are composed of four main blocks: high voltage power source, energy storage bank, control switch, and coil. Each one of these blocks has characteristics that influence how well the circuit will perform for TMS procedures. A successful TMS research circuit must have the ability to emit controlled electromagnetic pulses through a coil connected to it. For the first block, voltages ranging from 50 V to 2 kV were used. In the second …

Ab-Initio And Empirical Simulations Of Aluminum And Copper Metal, William Wolfs

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this work, I perform detailed calculations on the bulk and electronic properties of aluminum and copper metal. Originally, I was motivated by experimental work on the solidsolid phase changes in pure aluminum. These phase changes were well predicted by density functional theory(DFT) but difficult or impossible to predict using embedded atom method potentials(EAM). EAM potentials are in wide use to describe many properties of bulk materials, and it seemed worrying that something so basic as a phase change could not be predicted. I began running high precision calculations with DFT and compared the results to EAM potentials which had …

Factors Influencing Us Residents' Willingness To Engage In Domestic Medical Tourism, Hananeh Derakhshan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Domestic medical tourism is a niche market in the medical tourism industry. The purpose of this study was to determine the association of different attributes on U.S residents’ willingness to participate in domestic medical tourism. Based on the medical tourism index (MTI) components, a total of fourteen possible attributes that may impact US residents’ willingness to seek out-of-town care were created and participants were asked to rate the importance of each attribute on their willingness to seek out-of-town care on a 10-point Likert scale. Using principal component analysis, the attributes were grouped into three components: (1) quality-of-care, (2) destination attraction, …

How Can We Reduce Racism? A Mixed Method Study Of Factors That Influence Attitudes Towards Social Change, Kindy Insouvanh

UNLV Theses, Dissertations, Professional Papers, and Capstones

The resurgence of social movements such as Black Lives Matter has provoked public discourse about racial inequality and efforts towards social change. The current study sought to better understand how young adults reason about racism reduction with a focus on racial allyship and collective action. The present study used mixed methods to identify strategies young adults believe different racial groups could do to reduce racism and investigate the influence that individual factors have on reasoning about social change. Here, I present emergent themes to describe racism reduction strategies from a large and racially diverse sample of undergraduate students (N= 428). …

Multiple Approaches To Auditory Rhythm: Development Of Sustained Musical Beat And The Relation To Language, Development Of Rhythmic Categories Via Iterated Production, And A Meta-Analytic Study Of Neural Entrainment To Beat, Karli Marie Nave

UNLV Theses, Dissertations, Professional Papers, and Capstones

Rhythm is ubiquitous to human communication, coordination, and experience of music. In this dissertation, I address three empirical questions through three different methodologies, all of which contribute to the growing body of literature on human auditory rhythm processing. In Chapter 2, I present a registered report detailing the results of independent conceptual replications of Nozaradan, Peretz, Missal, & Mouraux (2011), all using the same vetted protocol. Listeners performed the same tasks as in Nozaradan et al. (2011), with the addition of behavioral measures of perception. In neuroscience, neural correlates to musical beat perception have been identified, yet little to no …

Autism Spectrum Disorder And Remote Learning: Parents’ Perspectives On Their Child’S Learning At Home, Stephanie Hernandez

UNLV Theses, Dissertations, Professional Papers, and Capstones

The global COVID-19 pandemic led to the universal restricted access of school grounds and caused students to transition to a remote learning environment. Students with Autism Spectrum Disorder (ASD) are eligible for special educational services and are normally provided additional support during school. Due to the COVID-19 pandemic, delivery of multiple support resources became limited, and parents needed to consider how their child’s education and support would be incorporated in their new educational environment.

During the pandemic, parents had the opportunity to provide various instructional assistance and support at home. Scaffolding, a type of guidance used when a child is …

Factors Affecting Registered Behavior Technicians’ (Rbts’) Intent To Stay Or Leave: A Delphi Study, Samantha Joy Villanueva Jasa

UNLV Theses, Dissertations, Professional Papers, and Capstones

Approximately one in 54 children in the United States were diagnosed with Autism Spectrum Disorders (ASD) in 2020 (Center for Disease Control and Prevention, 2020). The most common treatment for children with ASD is Applied Behavior Analysis (ABA), which uses and applies behavior analytic principles to various interventions to increase social skills, self-help skills, and communication skills, as well as decrease protest or self-stimulatory behaviors (BACB, 2021a; Dixon et al., 2017). Registered behavior technicians (RBTs; BACB, 2021d) are the individuals necessary to work directly with children with ASD providing ABA services, however, the estimated turnover rates for RBTs range from …

The Effects Of Real-Time Computerized Needle Tip Location Feedback On State Anxiety And Immediate Performance Of Simulated Ultrasound-Guided Regional Anesthesia, Joseph Janakes

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Complications of ultrasound-guided regional anesthesia (UGRA) in the clinical setting are severe and frequently related to improper needle tip placement, which is a challenging skill for novice student learners. Accordingly, anesthesia education programs are incorporating simulation-based teaching methods that use expensive procedural task trainers to aid in UGRA training. However, it was unknown if the task trainers with real-time computerized needle tip location feedback affect student anxiety and immediate simulated UGRA performance, leaving educators wondering if the cost was justified.Aims: The purpose of the study was to examine the effects of real-time computerized needle tip location feedback on students’ …

Environmental Rhetoric And An Ecology Of Transcendence: A Rhetorical Criticism Of Awake, A Dream From Standing Rock, Alyssa Kahn

UNLV Theses, Dissertations, Professional Papers, and Capstones

My project blends Burkean theory with Indigenous rhetoric to argue that the counter- story of Awake proposes an ecology of transcendence to make sense of human-nature relationships. I wanted to analyze Awake A Dream From Standing Rock. The documentary is explicitly about Indigenous peoples. This documentary tells the story of the peaceful protests and resistance led by Native people at the Standing Rock Sioux Reservation or Lakota Tribe in North Dakota. The activists were protecting the water otherwise known as water protectors/warriors from the construction of the Dakota Access Pipeline (DAPL). The assembly of DAPL is intended to carry perforated …

Are Gaming And Gambling Disorders Related? Examining The Roles Of Money, Relative Deprivation, And Upward Mobility, Anthony J. King

UNLV Theses, Dissertations, Professional Papers, and Capstones

Few studies have examined the financial motives and risks involved in modern video games, as well as the psychosocial factors contributing to this type of gaming involvement. Previous research on gambling has shown financial motives alone to be a major risk factor for the development of gambling disorder, with higher levels of personal relative deprivation (PRD) identified as a main contributor to this relationship. Therefore, the present study investigated whether this association applied to US adult video gamers, and if it would predict their problematic gaming behaviors. We hypothesized PRD and gaming disorder severity would have a positive association, with …

The Use Of Post-Course Feedback On Mastery Learning In A Professional Development Context, Thomas M. Kramer

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study investigated the effect of feedback to measure post-mastery learning in a professional development course designed for child welfare worker. In addition, the study explored the subjects’ perceptions of benefits gained by taking an online professional development course for child welfare worker. Specifically, the effect of email summaries sent out after the completion of the course on the participant’s retention of material covered in the course was assessed. The summary emails were designed to enhance the benefits of reviewing the study material after the completion of the course with a particular focus on the quantity and frequency of reminders …

Exploring The Relation Between Musical And Dance Sophistication And Musical Groove Perception, Samantha R. O'Connell

UNLV Theses, Dissertations, Professional Papers, and Capstones

Listening to groovy music is an enjoyable experience and a ubiquitous human behavior in some cultures. Specifically, many listeners agree that high-groove songs are enjoyable, familiar, and likable compared to low-groove songs. While the pleasurable and dance-inducing effects of musical groove listening seem omnipresent, what is less known is how subjective feelings towards music, individual musical or dance experiences, or more objective musical perception abilities are correlated with the way we hear music with groove. Therefore, the present online study aimed to evaluate how musical and dance sophistication relates to musical groove perception. One-hundred and twenty-four participants completed an online …

Measures And Conceptualizations Of Symptoms In Schizophrenia, Nina B. Paul

UNLV Theses, Dissertations, Professional Papers, and Capstones

Schizophrenia presents as a heterogenous disorder characterized by diverse expression of symptoms between individuals. Thus, clinicians and researchers rely on comprehensive symptom measures for diagnosis and treatment. This dissertation investigated two symptom measures, the Positive and Negative Syndrome Scale (PANSS; Kay, Fiszbein, & Opler, 1987), a commonly used scale that assesses a broad range of symptoms of schizophrenia, as well as the Brief Negative Symptom Scale (BNSS; Kirkpatrick et al., 2011; Strauss et al., 2012), a novel scale that focuses on the assessment of five negative symptom domains (i.e., anhedonia, asociality, avolition, blunted affect, and alogia). The first study of …

Bone Morphogenetic Protein Signaling Requirement In Centripetal Migration In Drosophila Melanogaster Oogenesis, Sheila Mosallaei

UNLV Theses, Dissertations, Professional Papers, and Capstones

Cells interact with each other via signals to coordinate migration for proper tissue development and maintenance, immunity and tissue repair. Signals regulate migration via changes to cytoskeletal components or transcriptional regulation. Here, I used Drosophila melanogaster to investigate whether and how a transcriptional signal, Bone Morphogenetic Protein signaling, drives a cell migration, centripetal migration. The migrating cells, centripetal follicle cells, consist of two subsets of cells, “leading” and “following” centripetal follicle cells, that although adjacent to each other, migrate differently. The differences in modes of migration correlate to differential gene expression in the centripetal follicle cells. The leading centripetal follicle …

Teaching A Communication Protocol Via Graduated Guidance On The Ipad To Assist In Functional Communication Training For Nonverbal Children With Asd, Janelle Saunders

UNLV Theses, Dissertations, Professional Papers, and Capstones

Non-verbal children with Autism Spectrum Disorders (ASD) often struggle with functional communication, and are often not able to express their wants, needs, emotions, or engage in meaningful conversations (Hudry et al., 2010; Luyster et al., 2008; Weismer et al., 2010). Picture exchange systems as well as AAC devices (e.g., the iPad) have emerged as viable options to teach this population how to communicate effectively (Charlop-Christy et al., 2002; Couper et al., 2014; Dogoe et al., 2010; Ganz et al., 2015; Greenberg et al., 2012; Logan et al., 2017). PECS has been widely established as an evidence-based practice and is often …

Learning As We Grow: A Multiple Case Study Of Teachers Experiences With Graduate Online Courses, Erica K. Reid

UNLV Theses, Dissertations, Professional Papers, and Capstones

Teacher professional development in the United States has significant gaps in practical training. In the state of Nevada, research has shown discrepancies between the retention of skills from training sessions and the ability to transfer learned methods into daily classroom practices. Previous studies have investigated teacher professional development and understanding its influence on student learning. Furthermore, the limits in framework design for contemporary approaches to professional development in online mediums has created inconsistencies in measuring outcomes. Finally, current research has resulted in mixed reviews concerning training in nontraditional online courses offered through graduate courses in various organizations. This research explored …

Re-Analysing Astronomical Alignments Of Potential E Group Structures To Demonstrate The Utility Of Archeoastronomy Research About The Ancient Maya, Elizabeth Karen Shikrallah

UNLV Theses, Dissertations, Professional Papers, and Capstones

There has been much study of Maya astronomy and the relationship and/or manifestation of astronomy within architecture and other aspects of Maya material culture. Despite this, there is little agreement about the commonalities and variation in potential astronomical representation across sites and regions as it is difficult to compare sites to determine whether spatial patterning exists between similar building classifications. Also, it can be difficult to understand and pursue archeoastronomy research due to the jargon and methodology employed. This thesis provides an updated dataset that shows the utility of pursuing archeoastronomy research about the ancient Maya. Combining archaeological and archeoastronomical …

Relationship Between Standardization Critical Success Factors (Csfs) And Project Performance, Binit Kumar Shrestha

UNLV Theses, Dissertations, Professional Papers, and Capstones

Facility standardization strategy is defined as the development and use of consistent designs to align project stakeholders, objectives, and scope to capture and optimize schedule, cost, and value. The implementation and proper execution of this strategy can lead to considerable benefits, such as design once and reuse multiple times, along with learning curve benefits in fabrication, operations, and construction, as well as accelerated responds to schedule needs. Although standardization strategy is not a new idea; capital projects have failed to achieve high levels of facility standardization. The primary reason for this is the industry’s struggle to execute standardized projects successfully. …

Tail-Measurable Functions And Their Corresponding Induced Classes, And Some Determinacy Conditions Involving 3-Player Games, Joshua K. Reagan

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this dissertation, we have two main categories of results. The first is regarding certain point-classes, and the second is regarding 3-player games.

The point-classes of Baire Space, \mathcal{N}, in the Borel and Projective Hierarchies, as well as Hausdorff's Difference Hierarchy have been well studied, and there has been much research into further stratifying these hierarchies. One area of particular interest falls in between the point-classes \mathbf{\Pi}_\mathbf{1}^\mathbf{1} and \Delta\left(\omega^2-\mathbf{\Pi}_\mathbf{1}^\mathbf{1}\right). It is well known that the point-classes \beta-\mathbf{\Pi}_\mathbf{1}^\mathbf{1}, for \beta\in\omega^2, stratify this region of the projective hierarchy, with the point-class \bigcup_{\beta\in\omega^2}\beta-\mathbf{\Pi}_\mathbf{1}^\mathbf{1} still falling strictly below \Delta\left(\omega^2-\mathbf{\Pi}_\mathbf{1}^\mathbf{1}\right). Dr. Derrick DuBose developed multiple …

Forecasting Pedestrian Trajectory Using Deep Learning, Arsal Syed

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this dissertation we develop different methods for forecasting pedestrian trajectories. Complete understanding of pedestrian motion is essential for autonomous agents and social robots to make realistic and safe decisions. Current trajectory prediction methods rely on incorporating historic motion, scene features and social interaction to model pedestrian behaviors. Our focus is to accurately understand scene semantics to better forecast trajectories. In order to do so, we leverage semantic segmentation to encode static scene features such as walkable paths, entry/exits, static obstacles etc. We further evaluate the effectiveness of using semantic maps on different datasets and compare its performance with already …

The Beat Of A Subculture: A Study Of The History And Impact Of Non-Pitched Percussion In Early Hip-Hop, Jeffrey Michael Taylor

UNLV Theses, Dissertations, Professional Papers, and Capstones

This document presents a study of the origins and role of non-pitched, percussion-based samples in the history and development of the hip-hop genre. The survey presents an historical synopsis of hip-hop’s origins including the infrastructure of the genre, the DJ forefathers, and the music and drummers responsible for the subcultural emergence. Emphasis is placed on the specific genres of music that influenced the creation of hip-hop and the drummers responsible for the sounds that were appropriated to create new musical works. Influential drummers are examined, and transcriptions are given to aid the development of relevant drum set performance techniques. A …

Understanding And Addressing Preservice Elementary Teachers’ Misconceptions In Science Education, Nicole Juliana Thomas

UNLV Theses, Dissertations, Professional Papers, and Capstones

Prior research has demonstrated that both children and adults alike hold misconceptions about various scientific phenomena (Snyder & Sullivan, 1995; Driver et al., 1985). These misconceptions range from a variety of different fields, including astronomy and space science, environmental biology, and geology, among others (Miller & Brewer, 2010; Wandersee et al., 1994; Ritger & Cummins, 1991). Research suggests that the vast majority of misconceptions are formed early in a students’ educational career, and these misconceptions could be held throughout adulthood unless they are sufficiently addressed (Coley & Tanner, 2012; Posner et al., 1982; Nehm & Reilly, 2007; Sadler et al., …

The Development Of Prerequisite Skills And Concepts From Task-Based Interviews In Calculus Students With Low-Levels Of Prerequisite Skills, Nicholas Wong

UNLV Theses, Dissertations, Professional Papers, and Capstones

This task-based interview study examined the development of prerequisite skills and concepts and calculus skill and concepts of students who entered a first-semester calculus course with a low level of prerequisite skills. The participants in this study completed three task-based interviews with two tasks in each interview. The research question addressed by this study was, To what extent do task-based interviews reveal students’ prerequisite skills and conceptual understanding for applications of the derivative and how do these skills and understanding develop for students who have been classified as having low levels of prerequisite skills upon entering a calculus course? The …