Digital Commons Network^™

Quantifying The Relationship Between Soil Organic Carbon And Soil Color In Nebraska, Aldi J. Airori

Applied Science Program: Theses

Soil color is easily measured in the field and holds potential to be used as an indirect measurement of soil organic carbon (SOC). The main limitation to this approach is knowledge about the specific color-SOC relationship in a region, which often varies in relation to parent material, soil texture, climate, and land use. Furthermore, the Munsell color data is subjective in nature. The objectives of this study are: 1) to develop and evaluate the accuracy of pedotransfer functions (PTFs) for the prediction of SOC based on soil color and texture in the state of Nebraska and 2) to evaluate digital …

A Multitask Deep Learning Approach For Pulmonary Embolism Detection And Identification, Xiaotian Ma, Emma C. Ferguson, Xiaoqian Jiang, Sean I. Savitz, Shayan Shams

Faculty Research, Scholarly, and Creative Activity

Pulmonary embolism (PE) is a blood clot traveling to the lungs and is associated with substantial morbidity and mortality. Therefore, rapid diagnoses and treatments are essential. Chest computed tomographic pulmonary angiogram (CTPA) is the gold standard for PE diagnoses. Deep learning can enhance the radiologists’workflow by identifying PE using CTPA, which helps to prioritize important cases and hasten the diagnoses for at-risk patients. In this study, we propose a two-phase multitask learning method that can recognize the presence of PE and its properties such as the position, whether acute or chronic, and the corresponding right-to-left ventricle diameter (RV/LV) ratio, thereby …

A Comprehensive Artificial Intelligence Framework For Dental Diagnosis And Charting, Tanjida Kabir, Chun Teh Lee, Luyao Chen, Xiaoqian Jiang, Shayan Shams

Faculty Research, Scholarly, and Creative Activity

Background: The aim of this study was to develop artificial intelligence (AI) guided framework to recognize tooth numbers in panoramic and intraoral radiographs (periapical and bitewing) without prior domain knowledge and arrange the intraoral radiographs into a full mouth series (FMS) arrangement template. This model can be integrated with different diseases diagnosis models, such as periodontitis or caries, to facilitate clinical examinations and diagnoses. Methods: The framework utilized image segmentation models to generate the masks of bone area, tooth, and cementoenamel junction (CEJ) lines from intraoral radiographs. These masks were used to detect and extract teeth bounding boxes utilizing several …

Impact Of Covid-19 On Health Risk Behaviors In Northern California: A Cross-Sectional Survey, Adriana Telias, Marcelle M. Dougan, Giselle A.P. Pignotti

Faculty Research, Scholarly, and Creative Activity

The COVID-19 pandemic has been disruptive, unevenly impacting health behaviors in different geographical regions and population groups. We examined how COVID-19 affected perceived changes in physical activity, sleep, and diet and the impact of socio-demographic variables on a calculated health risk behavior score. In this cross-sectional study, 505 residents of northern California completed a web-based survey from August to November of 2020. Chi-square and multivariable linear regression analyses examined the association between socio-demographic variables and the health risk behavior score. Approximately 84 % of respondents experienced at least one unfavorable behavior change after the pandemic, with 49.5 % indicating a …

Meeting The 24-H Movement Guidelines And Health-Related Outcomes Among Youth With Autism Spectrum Disorder: A Seven-Country Observational Study, Chunxiao Li, Justin A. Haegele, Fenghua Sun, Maria Luiza Tanure Alves, Stefanie Hwee Chee Ang, Jihyun Lee, Kwok Ng, Isabella Dos Santos Alves, Sean Healy, Wendy Yajun Huang, Pauli Rintala, Jernice Sing Yee Tan, Yandan Wu, Hannah Yang, Eija Kärnä, Hyokju Maeng, André Lisandro Schliemann, Ding Ding

Faculty Research, Scholarly, and Creative Activity

Background: Meeting daily guidelines for physical activity, screen time, and sleep duration is associated with a host of health indicators for youth. In this cross-sectional observational study, we investigated the associations between adherence to the movement guidelines and health-related outcomes among youth with autism spectrum disorder (ASD). Methods: Parents of youth with ASD (10–17 years) from seven countries and regions were invited to provide online proxy-reports for child’s movement behaviors (i.e., physical activity, sleep and screen time), and health-related outcomes (i.e., body mass index [BMI], general health, and quality of life). A series of multiple linear regression analyses were used …

Deep Immunophenotyping Reveals Endometriosis Is Marked By Dysregulation Of The Mononuclear Phagocytic System In Endometrium And Peripheral Blood, Júlia Vallvé-Juanico, Ashley F. George, Sushmita Sen, Reuben Thomas, Min Gyoung Shin, Divyashree Kushnoor, Joshua J. Vásquez, Kim Chi Vo, Juan C. Irwin, Nadia R. Roan, Alexis J. Combes, Linda C. Giudice

Faculty Research, Scholarly, and Creative Activity

Background: Endometriosis is a chronic, estrogen-dependent disorder where inflammation contributes to disease-associated symptoms of pelvic pain and infertility. Immune dysfunction includes insufficient immune lesion clearance, a pro-inflammatory endometrial environment, and systemic inflammation. Comprehensive understanding of endometriosis immune pathophysiology in different hormonal milieu and disease severity has been hampered by limited direct characterization of immune populations in endometrium, blood, and lesions. Simultaneous deep phenotyping at single-cell resolution of complex tissues has transformed our understanding of the immune system and its role in many diseases. Herein, we report mass cytometry and high dimensional analyses to study immune cell phenotypes, abundance, activation states, …

A Multi-Site, International Audit Of Malnutrition Risk And Energy And Protein Intakes In Patients Undergoing Treatment For Head Neck And Esophageal Cancer: Results From Inform, Lisa Martin, Merran Findlay, Judith D. Bauer, Rupinder Dhaliwal, Marian De Van Der Schueren, Alessandro Laviano, Adrianne Widaman, Vickie E. Baracos, Andrew G. Day, Leah M. Gramlich

Faculty Research, Scholarly, and Creative Activity

Patients with foregut tumors are at high risk of malnutrition. Nutrition care focuses on identifying individuals at risk of malnutrition and optimizing nutrient intake to promote the maintenance of body weight and lean body mass. This multi-center prospective, longitudinal study audited nutrition care practices related to screening for risk of malnutrition (Patient-Generated Subjective Global Assessment Short Form; PG-SGA SF), and nutrition interventions prescribed (route; adequacy of energy and protein intakes). Audits occurred at four time periods: baseline (before treatment) and at 2, 4, and 6 months after starting cancer treatment; 170 patients (esophageal (ESO; n = 51); head and neck …

Development And Evaluation Of A Novel Dietary Bisphenol A (Bpa) Exposure Risk Tool, Jennifer C. Hartle, Roy S. Zawadzki, Joseph Rigdon, Juleen Lam, Christopher D. Gardner

Faculty Research, Scholarly, and Creative Activity

Background: Exposure to endocrine disrupting chemicals such as bisphenol A (BPA) is primarily from the diet through canned foods. Characterizing dietary exposures can be conducted through biomonitoring and dietary surveys; however, these methods can be time-consuming and challenging to implement. Methods: We developed a novel dietary exposure risk questionnaire to evaluate BPA exposure and compared these results to 24-hr dietary recall data from participants (n = 404) of the Diet Intervention Examining The Factors Interacting with Treatment Success (DIETFITS) study, a dietary clinical trial, to validate questionnaire responses. High BPA exposure foods were identified from the dietary recalls and used …

Promoting Permanency In Families With Parental Substance Misuse: Lessons From A Process Evaluation Of A Multi-System Program, Karla Shockley Mccarthy, Jennifer Price Wolf, Elinam Dellor

Faculty Research, Scholarly, and Creative Activity

Background: Families affected by substance misuse are at increased risk for child maltreatment and child welfare system involvement. The Enhancing Permanency in Children and Families (EPIC) program uses four evidence-based and informed multi-system practices to promote safety and permanency outcomes for children involved with the child welfare system due to parental substance misuse: 1) Peer Recovery Support (PRS), 2) Family Treatment Drug Court (FTDC), 3) Medications for Opioid Use Disorder (MOUD) and 4) Nurturing Parent Program (NPP) relational skill-building. The purpose of the current study was to identify barriers, facilitators, and lessons learned in the implementation of and client engagement …

Examining The Differential Protective Effects Of Women's Spirituality And Religiosity On Alcohol And Marijuana Use By Sexual Identity, Laurie A. Drabble, Amy A. Mericle, Cat Munroe, Alison Cerezo, Katherine J. Karriker-Jaffe, Tonda L. Hughes, Karen F. Trocki

Faculty Research, Scholarly, and Creative Activity

The current study explored how religiosity and spirituality may differentially influence substance use by sexual identity based on a sample of adult sexual minority women (SMW; n = 437 lesbian; n = 323 bisexual) relative to a heterosexual comparison sample (n = 636). We examined three questions: (1) whether spirituality was differentially associated with alcohol and marijuana use by sexual identity; (2) whether religiosity was differentially associated with alcohol and marijuana use by sexual identity; (3) whether observed differences between spirituality or religiosity and substance use by sexual identity persisted after adjusting for religious environment. Measures included spirituality (importance of …

Traffic Restrictions During The 2008 Olympic Games Reduced Urban Heat Intensity And Extent In Beijing, Bo Yang, Hongxing Liu, Emily L. Kang, Timothy L. Hawthorne, Susanna T.Y. Tong, Song Shu, Min Xu

Faculty Research, Scholarly, and Creative Activity

Satellite thermal remote sensing has been utilized to examine the urban heat dynamics in relation to the urban traffic restriction policy. During the 2008 Olympic Games in Beijing, the traffic volume was approximately cut off by half through the road space rationing. Based on daily MODIS satellite thermal observations on the surface temperature, statistical models were developed to analyze the contribution of traffic volume reduction to the urban heat intensity and spatial extent. Our analyses show that cutting off half of the traffic volume has led to a marked decrease in the mean surface temperature by 1.5–2.4 °C and shrinkage …

Qualitatively Exploring The Impact Of A Relationship-Centered Communication Skills Training Program In Improving Patient Perceptions Of Care, Marie C. Haverfield, Robert Victor, Brenda Flores, Jonathan Altamirano, Magali Fassiotto, Merisa Kline, Barbette Weimer-Elder

Faculty Research, Scholarly, and Creative Activity

Objective: To explore qualitative patient experience comments before and after a relationship-centered communication skills training to understand patient experience, program impact, and opportunities for improvement. Methods: Qualitative patient experience evaluation data was captured from January 2016 to December 2018 for 483 health care clinicians who participated in the skills training. A random sampling of available open-ended patient comments (N = 33,223) were selected pre-training (n = 668) and post-training (n = 566). Comments were coded for valence (negative/neutral/positive), generality versus specificity, and based on 12 communication behaviors reflective of training objectives. Results: No significant difference was found in the valence …

Supporting Inclusive Learning Using Chatbots? A Chatbot-Led Interview Study, Sambhav Gupta, Yu Chen

Faculty Research, Scholarly, and Creative Activity

Supporting student academic success has been one of the major goals for higher education. However, low teacher-to-student ratio makes it difficult for students to receive sufficient and personalized support that they might want to. The advancement of artificial intelligence (AI) and conversational agents, such as chatbots, has provided opportunities for assisting learning for different types of students. This research aims at investigating the opportunities and requirements of chatbots as an intelligent helper to facilitate equity in learning. We developed a chatbot as an experimental platform to investigate the design opportunities of using chatbots to support inclusive learning. Through a chatbot-led …

Non-Small Cell Lung Cancer With Met Exon 14 Skip Mutation: Case Report, Wolfgang Clough, Mira Al Jaberi, Samir Dalia

Student Publications

Background: Non-small cell lung cancer (NSCLC) is the most common type of lung cancer, making up 80-85% of all lung malignancies. It can be further subdivided into different types. The three main subtypes are adenocarcinoma, squamous cell carcinoma, and large cell carcinoma. Traditionally, NSCLCs have been treated with a combination of chemotherapy, surgery, and/or radiation therapy. However, with the advent of genotype subtype analysis and targeted therapy it has become possible to have individualized treatment options for patients with NSCLC.

Case description: We present a case report of a 68-year-old female with NSCLC. Patient initially only received radiation therapy due …

Fabrication Of Solar Absorber Tube With Internal Fin Structure With In718 And Effect Of Boron With In718 For Solar Absorber Tube Using Selective Laser Melting 3d Printing Technology, Naznin Nuria Afrin

Theses and Dissertations

This research aimed to fabricate Solar Absorber Tubes for Solar-Thermal Power Plant with internal fin structures using Selective Laser Melting (SLM) technology. In this study, we investigated the effect of B with IN718 in 3D printing using SLM for solar absorber tubes. The objective was to study the material-process-properties relationship with goal to identify and validate the optimal parameters for the SLM process. Material selected for this study was IN718 with 0.5% and 1% B particle mixed using a V-shape mixing machine. The flowability test was conducted using the Angle of Repose (AOR) method. 3D printed samples …

Development Of Vegetable Oil-Based Nano-Lubricants Using Ag, H-Bn And Mgo Nanoparticles As Lubricant Additives, Kollol Sarker Jogesh

Theses and Dissertations

Because of the harmful impact of petroleum-based lubricant on the environment and human body, vegetable oil-based lubricant with eco-friendly nanoparticles has a great potential to be an alternative lubricant if it possesses proper lubricating properties. In this study, thermal conductivity, viscosity and tribological properties (wear scar diameter and coefficient of friction) of vegetable oil-based nanolubricant, developed from soybean oil and sunflower oil, modified with Ag, h-BN and MgO nanoparticles as lubricant additives, were evaluated. For thermal conductivity evaluation, a line heat source method was used with KD2 Pro-Thermal Property Analyzer. For viscosity evaluation, Haake Mars 40-rheometer was used to evaluate …

Influence Of Pretreatments On Physiological Status And Post-Planting Survival Of Thornforest Seedlings In A Restoration Context, Douglas E. Mainhart

Theses and Dissertations

Semi-arid ecosystems across the globe have faced land conversion posing a threat to the important ecosystem services they provide. Revegetation-centered restoration efforts in arid regions have low success due to limited water availability and higher temperatures. Typically, practitioners utilize methods that modify field conditions around seedlings to mitigate these stressors. I evaluated the efficacy of in-nursery treatments to improve plant water status. Three pretreatments were applied: elevated CO2, drought hardening, and an antitranspirant foliar spray. My goal was to understand how these pretreatments would impact survival and growth in the field and what physiological traits they altered. Elevated CO2 and …

Exploring The Interpersonal, Leadership, And Organizational Factors Related To The Burnout Of Bilingual, Latinx Professional School Counselors [Explorando Los Factores Interpersonales, De Liderazgo Y Organizacionales Relacionados Con El Agotamiento De Los Consejeros Escolares Profesionales Bilingües Y Latine], Crystal Marie Prado

Theses and Dissertations

This study explored the relationship between interpersonal competencies, educational leadership styles of campus principals, organizational practices, and the burnout of professional school counselors (PSCs). A mixed-methods research design was utilized to examine the correlation between identified predictor variables and the level of burnout as measured by the five dimensions of the Counselor Burnout Inventory (CBI; Lee et al., 2007), the three subscales of the Maslach Burnout Inventory: Educators Survey (MBI-ES, Maslach et al., 1986), and personal narratives documenting the participating PSC's most significant professional experiences. The investigation included 100 bilingual, Latinx PSCs from four urban/suburban school districts of border towns …

Incorporating Native Plants In Insectary Strips To Promote Insect Diversity And Below-Ground Beneficial Microbes In South Texas, Lindsey N. Richards

Theses and Dissertations

Farm edges are generally the most undisturbed areas in a farm with diverse vegetation and can enhance agrobiodiversity and provide crucial food and shelter for wildlife, insects, and soil biota. Planting native wildflowers with the ability to reseed and withstand local climatic conditions for semi-permanent vegetation around farm edges or in between crops has potential to biologically control pests. To test this, we ran a two-year study and installed three different flowering insectary strips on a certified organic vegetable farm in South Texas during the winter season. The treatments were: 1) a commercially sourced 17-species native wildflower seed mix; 2) …

High Throughput And Highly Controllable Methods For In Vitro Intracellular Delivery, Justin Brooks, Grayson Minnick, Prithvijit Mukherjee, Arian Jaberi, Lingqian Chang, Horacio D. Espinosa, Ruiguo Yang

Department of Mechanical and Materials Engineering: Faculty Publications

In vitro and ex vivo intracellular delivery methods hold the key for releasing the full potential of tissue engineering, drug development, and many other applications. In recent years, there has been significant progress in the design and implementation of intracellular delivery systems capable of delivery at the same scale as viral transfection and bulk electroporation but offering fewer adverse outcomes. This review strives to examine a variety of methods for in vitro and ex vivo intracellular delivery such as flow-through microfluidics, engineered substrates, and automated probe-based systems from the perspective of throughput and control. Special attention is paid to a …

Bevers: A General, Simple, And Performant Framework For Automatic Fact Verification, Mitchell Dehaven

School of Computing: Dissertations, Theses, and Student Research

Fact verification has become an important process, primarily done manually by humans, to verify the authenticity of claims and statements made online. Increasingly, social media companies have utilized human effort to debunk false claims on their platforms, opting to either tag the content as misleading or false, or removing it entirely to combat misinformation on their sites. In tandem, the field of automatic fact verification has become a subject of focus among the natural language processing (NLP) community, spawning new datasets and research. The most popular dataset is the Fact Extraction and VERification (FEVER) dataset. In this thesis an end-to-end …

"Keep To The Code”: A Global Code Of Conduct For Third-Party Funders, Victoria Sahani

Faculty Scholarship

Global commercial third-party funding has given rise to wide-ranging regulatory approaches worldwide. Consequently, funders can engage in cross-border regulatory arbitrage by exploiting regulatory gaps within and among nations. This Article argues that the global community of nations should articulate a universal approach to the behavioral expectations of third-party funders operating transnationally, independent of local laws regarding the technical business of funding. It asserts that the key to fostering the ethical development of the third-party funding industry is to develop a globally applicable but locally enforced code of conduct or professional responsibility for the industry. Moreover, a successful regime for funder …

Why Money Is Well Spent On Time, Michael Ulrich

Faculty Scholarship

There are a few reasons why incentivizing clinicians to spend more time with patients can improve health outcomes. Doing so affords clinicians time to assess social determinants’ influences on their patients’ health experiences; offers opportunities to identify and respond to patients’ loneliness; and helps motivate patients’ trust in health care, strengthen patient-clinician relationships, and bolster patients’ adherence to clinicians’ recommendations.

Flexible Aid In An Uncertain World: The Coronavirus State And Local Fiscal Recovery Funds Program, Philip Rocco, Amanda Kass

Political Science Faculty Research and Publications

Emergency fiscal transfers to state, local, tribal, and territorial governments have been at the core of the U.S. federal government's response to the COVID-19 pandemic. The most extensive of these transfer programs is the Coronavirus State and Local Fiscal Recovery Funds (CSLFRF) program, contained in the American Rescue Plan Act of 2021. The CSLFRF is not only larger than prior rounds of emergency aid, it was also designed to address a broader series of crises, address pre-existing inequities, and provide greater discretion to public officials in deciding how to allocate funds. In this article, we consider the extent to which …

Insights On Factors Influencing Startup Failure In The Hospitality Industry, Shivangi Khurania

UNLV Theses, Dissertations, Professional Papers, and Capstones

Hospitality businesses and innovative startups have faced extremely high failure rates. The author provides insights on the factors that impact startup failure in the hospitality industry after performing a deep analysis on innovation frameworks such as the diffusion of innovation theory, the theory of disruptive innovation, and the ten types of innovation framework. Not only that, the author also provides insights based on their own personal experience and knowledge gained through education at the University of Las Vegas, Nevada. The research explored in this paper revealed that startup failure is not based on one factor alone and how leaders in …

Methods For Teaching Mindfulness Within The Workplace, Gerrel March

UNLV Theses, Dissertations, Professional Papers, and Capstones

Over the past few years, the world has been shaken by the COVID-19 pandemic and technological advancements that have contributed towards work-life imbalances. Now more than ever, organizations are focusing on improving mental health and well-being. This understanding holds value towards the hospitality industry as employee wellbeing has a direct link towards consumer experience. Considering the nature of the business, employees endure distress resulting from emotional labor, long work hours, etc, understanding how organizations can improve well-being is critical. This paper attempts to make significant contribution towards understanding both individual and organizational outcomes of mindfulness, best practices, and potential limitations …

The Emergence Of Serviced Apartments/Apart-Hotels And Opportunities Post Covid-19, Ding Jie Ang

UNLV Theses, Dissertations, Professional Papers, and Capstones

Serviced apartments are becoming more mainstream as people become more aware of this asset class. Since the onset of Covid-19, people have opted for serviced apartments instead of a hotel for self-contained, typically with more space with a living area, kitchen and access to laundry facilities throughout the pandemic. Combined with lower operating costs, higher profit margin, and lower cost per key at development revealed the financial resilience of this asset class as most serviced apartments operated at a higher occupancy than hotels. With renewed interest from developers and owners keen to build or convert their existing properties to serviced …

Identification Of Factors Contributing To Traffic Crashes By Analysis Of Text Narratives, Cristian D. Arteaga-Sanchez

UNLV Theses, Dissertations, Professional Papers, and Capstones

The fatalities, injuries, and property damage that result from traffic crashes impose a significant burden on society. Current research and practice in traffic safety rely on analysis of quantitative data from crash reports to understand crash severity contributors and develop countermeasures. Despite advances from this effort, quantitative crash data suffers from drawbacks, such as the limited ability to capture all the information relevant to the crashes and the potential errors introduced during data collection. Crash narratives can help address these limitations, as they contain detailed descriptions of the context and sequence of events of the crash. However, the unstructured nature …

The Parkinson’S Prison And The Hero’S Journey To Escape: Improvisation And Storytelling In Parkinson’S Disease, Robert David Cochrane

UNLV Theses, Dissertations, Professional Papers, and Capstones

Parkinson’s disease (PD) is the fastest growing neurological disorder in the world, with leading researchers calling it a pandemic. While there is no cure, pharmaceuticals and surgical interventions increase people with Parkinson’s (PWP) ability to lead longer and more productive lives. However, there is a lack of care available for PWP supporting their social and emotional domains. PWP report high levels of stress, anxiety, and isolation due to the chronic and unpredictably progressive nature of the disease. This leads to a vicious cycle of loss of confidence, decreased activity and socialization, and increased falls.A common phrase in the PD community …

Payment Profiles: Using Payment Transaction Data To Identify And Characterize Gamblers, Kasra Ghaharian

UNLV Theses, Dissertations, Professional Papers, and Capstones

Payment providers in the gambling industry facilitate transactions, allowing customers to transfer money to and from wagering accounts. Payments transaction data is information that is captured from these transactions, including, for example, the type, amount, time, and location. How this data may be used for gambling harm minimization and prevention has garnered significant interest, particularly due to accelerated payments modernization in the wake of the COVID-19 pandemic. With this study, I explored the utility of payments transaction data to categorize subgroups of gamblers in order to identify individuals who may be at-risk of harm. I benchmarked six cluster analysis methods …