Digital Commons Network^™

Towards Cfd Investigations Into Particulate Air Pollution Of A Desert Urban Environment, Prosun Roy

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation has explored computational fluid dynamics (CFD) techniques for studying particulate air quality in the Las Vegas urban area. The dissertation is based on three research tasks: • High time-resolution fenceline air quality sensing and dispersion modeling for environmental justice-centered source attribution. (Chapter 2) • Pollen dispersion and deposition in real-world urban settings: A computational fluid dynamic study. (Chapter 3) • Effects of urban canopy parameterizations on modeling pollen dispersion and exposure. (Chapter 4) In Chapter 2, we investigate the facilitation of low-cost air quality sensors (LCAQS) and CFD technique on exposure assessment of environmental justice (EJ) communities and …

Facial Expression Recognition Using Convolutional Neural Networks (Cnns) And Generative Adversarial Networks (Gans) For Data Augmentation And Image Generation, Shekhar Singh

UNLV Theses, Dissertations, Professional Papers, and Capstones

Facial expressions play a crucial role in human communication, serving as a powerful means to convey emotions. However, classifying facial expressions using artificial intelligence (AI) can be challenging, especially with small datasets and images. Facial Expression Recognition (FER) is an active area of research, with Convolutional Neural Networks (CNNs) being widely employed for classification. In this research, we propose a CNN-based approach for FER that utilizes both original and augmented datasets to enhance classification accuracy. Experimental results on the FER2013 dataset show test accuracies of 63.39% and 64.59% for the original and augmented datasets, respectively, in a seven-class classification task. …

Initial Development And Psychometric Evaluation Of The Mental Health Optimization Checklist (Mhoc), Raymond E. López

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: The Mental Health Optimization Checklist (MHOC) is a proposed measure which utilizes the theory of optimization science to improve mental health outcomes. Psychopathology is typically viewed dichotomously (i.e., does or does not have a disorder) or through cut-off criterion (i.e., 4 out of 5 symptoms, total scores), whereas optimization views psychopathology on a continuum on which patients can optimize factors impacting their mental health. Optimization theory is important for reducing stigma around mental health treatment and the MHOC offers itself as an informative psycho-diagnostic tool.

Methods: An undergraduate student sample (n = 682) completed the MHOC and the Symptom …

An Avalanche Transistor-Based Pulse Generator Design For Infrared Laser Applications, Abraham Lopez

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis details the design and results of a circuit intended for infrared laser applications, specifically for transcranial infrared light simulation (TILS) experiments and for use as a range finder. The circuit itself is comprised of a transistor, high voltage power supply, laser diode, capacitor, resistor, diode, and low voltage pulse. The design of a range finder is also developed. The range finder design is the same as the circuit developed for TILs with the addition of a few more components for receiving the returned light pulse such as a photodiode, op-amp, and comparator. The techniques used for a successful …

Ga(Y)Zing Backward: Queer Desire In Ovid, Shakespeare, And Scaimma, Falynn Blayre Brickler

UNLV Theses, Dissertations, Professional Papers, and Capstones

As Ovidian myth is a central influence on queer stories throughout time, I am interested in how the female/sapphic gaze impacts the retellings of these narratives. In this thesis, I analyze the action of the gaze as an expression of desire and discuss its multiple meanings in both text and performance. Through tracing the gaze within the queer/sapphic narratives of Shakespeare’s Twelfth Night and Sciamma’s Portrait of a Lady on Fire, I show that the gaze is an intersecting act through which non-normative desire is conveyed. In constructing the gaze as an ephemeral action of queer desire in practice, I …

The Importance Of An Educational Occupation-Based Work Program For Young Adults With Intellectual & Developmental Disabilities, Jennifer Zielinski

UNLV Theses, Dissertations, Professional Papers, and Capstones

Barriers to occupations and transitions to vocational opportunities can be difficult for adolescents and young adults with intellectual and developmental disabilities (I/DD)s to feel confident and pursue job opportunities. Some of the problems stem from the stigma related to the individual’s disability, the contexts surrounding them, and the performance of the work tasks expected. Individuals with I/DDs expressed that not having enough support in the community and the workforce creates significant obstacles to retaining a job. Occupational therapists (OT)s can play a unique role in transition and employment for individuals with an I/DD. With a focus on self-determination and successful …

Perceived Usefulness, Ease Of Use, And Satisfaction Of A Swaddle Bathing Educational Guide Among Parents/Guardians Of Nicu Premature Infants, Makenzie Leigh Hogbin

UNLV Theses, Dissertations, Professional Papers, and Capstones

The current availability of high-quality and comprehensive educational resources made available to parents and guardians with infants admitted to the Neonatal Intensive Care Unit is limited in terms of content and provision. Additionally, there exists a plethora of information regarding the impact of the sensory environment on premature and critically ill infants as well as interventions to mitigate these effects that are not efficiently conveyed to their families. Previous research asserts that consistency with the application of sensory interventions with these infants bodes well for positive outcomes, leading one to believe that caregivers may benefit from learning these strategies so …

Effects Of Postural Load Perturbations On The Stroke-Impaired Spinal Circuitry, Jose Galvez, Linh Thi My Nguyen, Brandon Yee

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective Transitioning from supported sitting position to standing activities requires coordinated interactions among postural muscles with appropriate reflexive responses to adapt to an increase in postural loading. Previous studies have found the failure to accommodate the challenge of increased postural loads in the stroke-impaired nervous system. In this study, we examined the H-reflex in response to different magnitudes of loads under static postural conditions, and compared the responses directly between individuals with a stroke-impaired nervous system and those with a non-neurologically impaired nervous system. We tested the hypothesis that the reflex amplitude would increase with increased load during standing in …

Polish Nationalism And The Flute Sonatina: The Influence Of Folklore On Inter-War Composers Tadeusz Kassern, Wojciech Kilar And Aleksander Tansman, Marta Plominska

UNLV Theses, Dissertations, Professional Papers, and Capstones

The music composed during World War II has been the subject of many concert programs in the classical music world. The music offers a poignant look into the human condition during a worldwide crisis and serves to capture the sentiments of the various cultures of the region during this time. One compelling musical perspective is from Polish nationals during WWII, who maintained a particularly fervent grasp on their national culture even while many were displaced and suppressed by the Nazi regime. This document will look at the flute compositions of three Polish nationals who wrote during this era, focusing on …

Driving And Community Mobility: An Online Educational Program For Generalist Occupational Therapy Practitioners, Gerard Blanco

UNLV Theses, Dissertations, Professional Papers, and Capstones

Driving is an important daily activity that often goes unnoticed, yet it enables individuals to engage in crucial tasks such as grocery shopping, going to work, and participating in social activities. Occupational therapy (OT) practitioners must recognize and address the significance of driving in their daily routines to promote clients' independence and fulfillment. However, despite being well-equipped to assist clients with driving-related issues, many practitioners avoid or neglect this area of occupation. A reluctance to addressing driving and community mobility (DCM) can arise from a lack of confidence, available resources, support, or fear of losing a client's trust. These barriers …

Examining Reflexive Communication Following A Break In Alcohol Abstinence, Lynda Kay Maxfield

UNLV Theses, Dissertations, Professional Papers, and Capstones

Over 107 million individuals are thought to have alcohol use disorder (AUD) (Ritchie & Roser, 2018). Discontinuing drinking can be difficult, but social support is thought to promote sobriety efforts. The r/stopdrinking online public community supports such efforts. This study has two broad aims: (1) explore how resilience building might occur on r/stopdrinking among initial users disclosing an abstinence disruption and responses from other users; and, (2) explore possible relationships, within initial posts, between resilience and three other phenomena (i.e., trauma, stated views of Alcoholics Anonymous, statements reflecting the transtheoretical model’s ten processes of change; Prochaska & Prochaska, 2021). To …

Development Of A Post-Op Transgender Care Program For Acute Occupational Therapy Practice, Marieliz Llanos

UNLV Theses, Dissertations, Professional Papers, and Capstones

Transgender people have experienced adverse health outcomes and barriers to care, ranging from the inability to provide a safe environment for inclusive and equitable care, lack of social support, and limited cultural competency and healthcare provider training. Furthermore, the scarcity of research in transgender care within the field of occupational therapy contributes to the disconnect between the needs of the transgender and gender-diverse (TGD) populations and the lack of preparedness in addressing the occupational performance deficits of transgender clients and individuals undergoing the transitioning process contribute to disparities that are reflected deeply in the experiences of these individuals. In the …

Investigating Students’ Lived Experience With Prebriefing Structure And Elements In Nursing Simulation Education, Meghan Liebzeit

UNLV Theses, Dissertations, Professional Papers, and Capstones

Prebriefing is a growing body of knowledge in nursing simulation education. It is recognized as an important factor in the simulation experience, however the practice of prebriefing varies widely making it difficult to understand what methods best prepare students for the simulation scenario. While research over the last decade has identified prebriefing increases confidence, skills, and clinical judgment, what content is important to include in prebriefing, or how it promotes the achievement of outcomes is under recognized.Implementing an intervention based on a pedagogically sound eight-week simulation clinical course, developed with the theoretical underpinnings of Vygotsky’s Zone of Proximal Development, Kolb’s …

No Scrubs: Nursing Applicant Trajectories After Rejection, Jennifer Torgerson

UNLV Theses, Dissertations, Professional Papers, and Capstones

There is a nursing shortage in the United States which has become even more apparent during the COVID-19 pandemic. Despite qualified applicants, thousands of students are turned away from educational programs each year as programs reach capacity limits. The rejection may have social, psychological, and economic consequences for the student. Students faced with rejection need to make decisions whether to continue their pursuit of nursing or go a different direction. This exploratory quantitative study aims to understand the trajectories of students that are not admitted into a capacity restricted nursing program at a community college in the Southwestern United States. …

Fear Of Recurrence As A Mediator Of Illness Perception And Perceived Stress In Acute Myocardial Infarction Survivors, Sarah E. Zvonar

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose: The primary objective of this study is to evaluate fear of recurrence as a mediator of illness perception and perceived stress. This research will determine how illness perceptions and fear of recurrence affect perceived stress in the acute myocardial infarction (AMI) population. Other aims will observe how demographics predict patients who may experience increased fear of recurrence and stress in the AMI population, how the variables of fear of recurrence change over time, and if fear of recurrence is still a significant mediator after controlling for depression and anxiety.Rational/ Conceptual Basis/ Background: Acute myocardial infarctions (AMIs) are often accompanied …

High-Yield Bioinspired Atmospheric Water Capture Through Hydrogels, Yiwei Gao

UNLV Theses, Dissertations, Professional Papers, and Capstones

Water scarcity is a global issue affecting billions of people, and atmospheric water harvesting (AWH) technology has been identified as a potential solution. However, existing single-material AWH approaches have limited water harvesting yields due to alternated water capture, storage, and release stages, and only function within a high relative humidity range. In my doctoral research project, we developed a bio-inspired, hydrogel-based multi-layer AWH approach that allows for segregated capture, storage, and release stages, and is envisioned to have higher daily water harvesting efficiency even in low-humidity areas. My research began with understanding the relations between hydrogel mechanical stiffness, hydraulic permeability, …

Utilizing An Interdisciplinary Approach: Education Of Early Progressive Mobility Protocol In The Icu/Acute Setting, Mary Ashley Galan-Gornal

UNLV Theses, Dissertations, Professional Papers, and Capstones

Prior to the COVID-19 pandemic, Early Progressive Mobility (EPM) was used more frequently in an interdisciplinary approach to improve patient outcomes. The aim is to create a protocol that takes an interdisciplinary approach and makes use of early progressive mobility. In the acute setting, occupational therapists are equipped to promote quality of life and independence both, during and after hospitalization, which is critical for early mobilization being beneficial for patients who are able to participate in therapy.This Doctoral Capstone project was aimed at demonstrating the value of occupational therapists in the intensive care unit (ICU)/acute setting by utilizing EPM in …

Poop! There It Is! Anti-Germinants And Biological Variables As Modulators Of Clostridioides Difficile Infection (Cdi), Jacqueline Renee Phan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Clostridioides difficile infection (CDI) is a major cause of antibiotic-associated diarrhea. Due to its insidious nature, the Centers for Disease Control and Prevention (CDC) has declared CDI an urgent threat. A key characteristic of C. difficile is its ability to form dormant spores that act as the infectious vehicles for disease. In the gut, spores recognize bile salts to germinate into toxin-producing cells.Dysbiosis of the gut microbiome is a key factor in allowing the C. difficile spores to germinate. Normal gut microbiota naturally protects from CDI. However, biological variables such as diet and sex have been found to modulate to …

Outside, Looking In: A Dissertation On Mindful Walking And How Green Exercise Affects State Mindfulness And Connectedness To Nature, Dustin Wyatt Davis

UNLV Theses, Dissertations, Professional Papers, and Capstones

INTRODUCTION: Mindfulness, green exercise, and connectedness to nature are increasingly popular topics among academics and the public. These three topics overlap in the underexplored area called mindful green exercise. Mindful green exercise is a blend of mindful exercise and green exercise. Mindful exercise is physical exercise during which people pay attention on purpose without judgment to each new present moment. The person applies an accepting awareness to internal phenomena (thoughts, emotions, and bodily sensations) and external phenomena (objects and events in the environment). Green exercise is exercise performed outdoors in natural environments. Despite its name, green exercise does not only …

Independent Living Skills Training For Individuals With Serious Mental Illness Through Program Development And Grant Writing, Bianca Rideout

UNLV Theses, Dissertations, Professional Papers, and Capstones

Serious mental illnesses can affect an individual’s level of independence. Oftentimes, individuals with such mental illnesses require assistance from a family member or paid caregiver to live in the community successfully. Occupational therapists work with people across the lifespan to improve an individual’s independence and overall well-being through meaningful occupations. Activities of daily living (ADLs) and instrumental activities of daily living (IADLs) are both comprised of tasks that are often completed by a person on a regular basis. Occupational therapists habilitate and rehabilitate people to be able to complete ADLs and IADLs as independently as possible. Many ADLs and IADLs …

Co-Teaching At The Secondary Level: A Qualitative Study Of Perceptions, Implementations, & Constructivism, Anne-Marie Raskin

UNLV Theses, Dissertations, Professional Papers, and Capstones

The intended outcome of this qualitative study was to provide valuable information that could improve pre-service teacher education programs and inclusion professional development programs, as well as help guide school-based administrators on how to better support co-teaching at the secondary level. In order to accomplish the outcome, the purpose of the study was twofold: (1) to examine secondary co-teachers’ perceptions toward their preparedness to co-teach in an inclusion classroom based on their pre-service training, overall professional development, and administrative support; and (2) to explore how well secondary co-teachers practice constructivist-oriented co-teaching. The research questions included: (1) How do secondary co-teachers …

Nonpharmacological Pain Management Of Adult Patients In The Burn Unit: An Interdisciplinary Toolkit Through The Occupational Therapy Lens, Taylor Harrison-Merrill

UNLV Theses, Dissertations, Professional Papers, and Capstones

Interdisciplinary care is the standard for individuals admitted to a burn unit, yet there is a lack of uniform education among different professionals regarding pain management (Kuhlmann & Tallman, 2022). Occupational therapists offer a unique and holistic lens to pain management by using nonpharmacological interventions to reduce patients’ perception of pain (American Burn Association, 2017; Nielson et al., 2022). The purpose of this quality improvement doctoral capstone was to apply this occupational lens in an educational toolkit designed for the interdisciplinary team that addressed nonpharmacological pain management for adults in the burn unit; effectively closing the knowledge gap across disciplines …

Developing A Physical Therapy Initial Evaluation Screening Tool For A Multidisciplinary Clinic For Adults With Down Syndrome, Isabella Russell, Alvin Lacap, Francis Lacap

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose: Down syndrome (Ds) is a chromosomal condition that can result in intellectual disability, as well as structural or functional disorders impacting the nervous, cardiovascular, and musculoskeletal systems. As individuals with Ds age, they can have an increased number of comorbidities that impact their health. Physical therapy can play an important role in managing many of the comorbidities adults with Ds have. Therefore, there is an increased need for physical therapists to efficiently screen, evaluate and treat adults with Ds. The purpose of this work is to create an Initial Evaluation Screening Tool and Patient Intake Form for physical therapists …

Optimizing Resin Infiltration Treatment Of Post-Orthodontic White Spot Lesions By Increasing Infiltrant Penetration Duration — In Vitro Study, Hahnnah Park

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: This study focuses on evaluating the effect of increasing duration allowed for resin infiltrant penetration in improving the aesthetic outcome of resin infiltration treatment. Additional investigations into repeat treatment and long-term stability were also conducted. Artifically created white spot lesions were induced on one hundred extracted teeth made up of either incisors or canines. Teeth were divided into enamel and dentin groups depending on the extent of the lesion and then further subdivided into varying treatment protocol groups: 3-minute, 6-minute, and 9-minute penetration time. Teeth were thermocycled for one clinical year and then divided into a repeat treatment and …

Trajectory Analysis For Driving Safety Quantification, Michael I. Chang

UNLV Theses, Dissertations, Professional Papers, and Capstones

In order to evaluate the efficacy of the skid recovery exercise in the Driver’s Edge teenage driving program, a process is established to determine the trajectories of vehicles from recorded videos, compare them in terms of similarity through dynamic time warping (DTW), and then analyze the similarity measurements to assess whether the program has a significant effect on driving ability by repeated measures analysis of variance (rANOVA). The video is analyzed by Harris corner detection and Lucas-Kanade optical flow method to ascertain the vehicle trajectories. A homography is then estimated to translate coordinates from video into real-world. The instructor and …

Inferring The Compositions And Interior Structures Of Small Planets, David R. Rice

UNLV Theses, Dissertations, Professional Papers, and Capstones

Although there are now over 10,000 confirmed and candidate extrasolar planets, accurate masses and radii have been determined for around 200 planets of less than 10 Earth-masses. This number will grow exponentially over the next decade as extreme precision radial velocity spectrographs see first light. The densities of small planets hint at a diverse range of compositions for terrestrial worlds from super-Mercuries to super-Ganymedes. Uncertainty in density is as low as 3% in the Trappist-1 system. To determine composition from observed parameters, the community uses a variety of interior structure models. Underlying these models are multiple computational techniques, numerous experimental …

Systems Dynamics Of The Anterior Cingulate Cortex And Hippocampus In Behavioral Switching, Spatial Working Memory, And Disease, Ryan Wirt

UNLV Theses, Dissertations, Professional Papers, and Capstones

The electrophysiological properties of the hippocampus (HC) and anterior cingulate cortex (ACC) are the central focus of research on learning, memory, and neurological disease. Previous research has shown that HC is essential for forming new memories, spatial navigation, and temporal processing. While the function of ACC, located within the medial prefrontal cortex, remains controversial, it has a role in long-term memory recall, processing pain, monitoring current state, learning, schema updates, and information integrations. Interactions between the ACC and HC occur during social memory, spatial working memory performance, and long-term memory recall. Notably, the HC and ACC are among the first …

Monitoring And Classification Of Tissue Perfusion Through The Combined Use Of Thermal, Rgb, And Laser Speckle Contrast Imaging, Ivan Soto

UNLV Theses, Dissertations, Professional Papers, and Capstones

In cooperation with the UNLV School of Medicine, this thesis is part of a bigger project aimed at developing a post-op surgery device for the constant unattended monitoring of a patient’s tissue. This device is intended to monitor areas of surgical sites and detect any complications without the need for continuous supervision by medical professionals. One such complication includes inadequate tissue perfusion, or a lack of blood flow reaching a patient’s tissue. The role of this thesis is to fit a convolutional neural network model to the available data gathered from voluntary participants and attempt to classify the data as …

Examining The Effects Of Perspective-Taking And Empathetic Concern On Attractiveness Biases In Millennial And Generation X Adults, Stephanie Verba-Quinones

UNLV Theses, Dissertations, Professional Papers, and Capstones

The current study examined the effects of perspective-taking and empathetic concern on attractiveness biases and stereotypes in Generation X and Millennial adults. Such biases and stereotypes are pervasive and can lead to preferential treatment and differential outcomes for individuals of varying attractiveness levels (see Langlois et al., 2000 for review). Previous research suggests that social media may amplify the importance placed on attractiveness, particularly for women (Fardouly et al., 2015; Perloff, 2014; Tiggemann et al., 2014; Toma & Hancock, 2018). Given the negative impacts of biases and stereotypes, this study sought to investigate pathways to reduce attractiveness biases and stereotypes …

Exploring The Usefulness Of The Alert Program On Children With Developmental Delays Or Disabilities At Positively Kids, Ashley Cassandra Manabat Tolentino

UNLV Theses, Dissertations, Professional Papers, and Capstones

This quality improvement project explored the implementation of the Alert Program's (AP) first and second phases within the Foundation for Positively Kids social skills program, PK Social ETC. This study focused on three staff members' perception of the Alert Program's usefulness on their clients' self-regulation skills and occupational participation when engaged in their daily social skills group. The Alert Program was delivered through weekly education sessions for the staff, followed by two groups involving the children to provide visual demonstrations for the staff over eight weeks. Data was collected through a pre- and post-survey using a Qualtrics survey to capture …