Digital Commons Network^™

A Machine Learning Approach For Survival Analysis Of Transplanted Kidneys Based On Donors’ And Recipients’ Factors., Alain Edward Despeignes

Theses and Dissertations

Over seven thousand people on average die each year in the United States waiting for an organ transplant due to the shortage of donated organs. With this alarming concern, efforts from the health organizations like the United Network Organ Sharing (UNOS) and government officials have considered avenues to remedy this distress, one of which is to investigate the characteristics among donors and recipients that affects the longevity of donated organs. The goal of this project is to investigate the survival time of transplanted kidneys from 1987 to 2018 with regards to the donors’ and the recipients’ characteristics including gender, ethnicity, …

Intent Visualization In Human-Agent Teams, Rahul Tushar Mehta

Theses and Dissertations

Despite advances in autonomous systems, effective collaboration between humans and intelligent agents remains a significant challenge, particularly in shared-control scenarios. This study investigates how intent visualization affects human-agent collaboration in telecollaboration scenarios, examining its impact on team performance, operator trust, and workload. Using a custom simulation environment and Wizard-of-Oz methodology, we conducted an experiment with 13 participants who completed exploration tasks under two conditions: a baseline interface and an enhanced interface with intent visualization. Results showed that while intent visualization did not significantly improve objective performance metrics, it led to a 22.6\% increase in explicit disagreements between operators and the …

Northeastern United States Urban High Schools’ Preparation Of Black Student-Athletes Seeking Initial Academic Eligibility In Ncaa Divisions I And Ii Institutions: A Phenomenological Analysis, Olinka Crusoe

Education Doctoral

This phenological study explored a total of 11 participants who were employed as either high school principals, guidance counselors, or athletic directors by Northeastern United States urban school districts. The participants were interviewed regarding their knowledge of the NCAA initial academic eligibility standards for Divisions I and II student-athletes and the support they provided to prepare their Black student-athletes to succeed academically in high school and throughout college. The findings revealed significant organizational knowledge gaps regarding NCAA requirements, with only one school aligning its course programming to with NCAA standards while the other schools focused primarily on local graduation requirements. …

Comparison Of Statistical And Machine Learning Genomic Prediction Methods In Plant Breeding: Case Studies In Maize And Soybean, Igor Kuivjogi Fernandes

Graduate Theses and Dissertations

Plant breeding is essential to increase genetic gain and food production worldwide. This study was conducted to evaluate new ways to use machine learning (ML) to tackle plant breeding challenges, where two ideas were tested — the first chapter focuses on how to combine genetic and environmental data using ML to improve the prediction of maize grain yield in multi-environment trials, while the second chapter centers on how to couple feature selection of molecular markers with ML to enhance prediction of yield in soybean, and, in both cases, ML approaches were compared to well-established statistical methods greatly adopted by the …

Establishing A Robust Decision Framework To Support Transportation Planning Decisions And Accommodate Connected And Autonomous Transportation Alternatives, Bobby Cottam

Graduate Theses and Dissertations

Transportation planning involves complex decisions to provide high-quality transportation systems involving multiple stakeholders with numerous competing interests, on top of that they are trying to improve the quality and reliability of those systems on shrinking budgets. This decision is further complicated by the advent of new transportation methods e.g., ride-hailing and the promise of connected and autonomous vehicles (CAVs). While the actual short-term impact of these technologies is uncertain, they will most certainly have a significant impact within the 20-year planning horizon that transportation planners typically consider. These technologies are also blurring the lines between traditionally separate modes of transportation; …

Oceano Dunes Community Survey Results, Michele Romolini, Eric G. Strauss, Marni Goldenberg, Keri Schwab

Center for Urban Resilience Reports

This report presents the findings of a 42-question survey conducted by Loyola Marymount University and Cal Poly San Luis Obispo from June 2023-May 2024 among visitors and local residents regarding their perceptions and experiences at California’s Oceano Dunes State Vehicular Recreation Area (SVRA). The survey aimed to gather insights into visitor and community demographics, frequency and types of use, barriers to use, environmental awareness and perceptions of use, and familiarity with park opportunities. In particular, we sought to seek responses from communities local to the parks, especially from the community of Oceano itself, and Latino and Hispanic community members. In …

Enhancing Mathematical Models For Covid-19 Pandemic Response: A Philippine Study, Timothy Robin Teng, Elvira De Lara-Tuprio, Ma. Regina Justina Estuar, Christian Pulmano, Lu Christian S. Ong, Zachary Pangan, Lenard Paulo V. Tamayo, Jasper John V. Segismundo, Mark Anthony C. Tolentino, Alyssa Nicole N. Ty

Mathematics Faculty Publications

Mathematical models supported by a robust automated data pipeline proved to be useful tools for a data-driven and science-based response and policy-making during the COVID-19 pandemic in the Philippines. In the first year of the pandemic, FASSSTER (Feasibility Analysis on Syndromic Surveillance using Spatio-Temporal Epidemiological modeleR) used a compartmental model to generate scenario-based projections of COVID-19 cases. The emergence of the Delta variant, however, and the administration of vaccines over the second half of 2021 caused significant changes in the Philippine pandemic landscape. This necessitated making adjustments to the model to better capture the local disease transmission dynamics and address …

Community Co-Production Of The Meaning Of Local Climate Resilience And Action: A Case Study, Michele Romolini, Mary Hillemeier, Dustin L. Herrmann

Center for Urban Resilience Scholarship

In the face of a rapidly urbanizing and warming planet, there is urgency for local governments to develop community resilience strategies. Successful climate change adaptation will likely require the inclusion of local knowledge, especially from historically marginalized communities. One pathway for this is through research projects and government planning activities that employ processes of co-production to generate actionable knowledge relevant to the community. This paper describes the approach, results, and reflections of a multi-sectoral partnership organized to engage residents of a small municipality to co-produce the meaning of community climate resilience, through methods including individual interviews, cognitive mapping, and a …

Populations Digitally Excluded From Education: Issues, Factors, Contributions And Actions For Policy, Practice And Research In A Post-Pandemic Era, Don Passey, Jean Gabin Ntebutse, Manal Yazbak Abu Ahmad, Janet Cochrane, Simon Collin, Asmaa Ganayem, Elizabeth Langran, Sadaqat Mulla, Ma. Mercedes T. Rodrigo, Toshinori Saito, Miri Shonfeld, Saunand Somasi

Department of Information Systems & Computer Science Faculty Publications

This conceptual paper draws on a wide range of research and policy literature, providing a contemporary view of issues, factors and practices that affect education for digitally excluded populations. Concern for how education for digitally excluded populations can be supported is focal to this paper, with different sections offering key related perspectives. From an analysis of issues, factors and practices, actions for policy, practice and research are identified. Given a key finding that power issues can have major effects on plans, implementation processes and outcomes when addressing needs of education for digitally excluded populations, the paper concludes by offering frameworks …

Phantom Jam Sybil Attack In Connected Vehicular Networks, Ahmed Ali Elamin Mohamed

Masters Theses and Doctoral Dissertations

Vehicular Ad-hoc Networks (VANETs) are vulnerable to Sybil attacks, mostly due to the lack of encryption in BSMs. In VANETs, multiple digital certificates (pseudonyms) are assigned to each vehicle to ensure their privacy. However, malicious nodes can exploit these pseudonyms to create ghost vehicles, inducing fake traffic jams and disturbance to other vehicles which may lead to accidents. In this work, we have developed the first sophisticated sybil attack, in which an attacker uses legitimate pseudonyms to create multiple ghost vehicles. These ghost vehicles transmit realistic kinematic data, using trajectory formulas and road maps. Additionally, the ghost vehicles randomly simulate …

A010: The Effect Of Coordinated Bilateral Movements On Selective Attention In Fourth Graders, Chenjun Zong, Xiaozan Wang, Rui Wu

International Journal of Physical Activity and Health

Introduction: Selective attention is a core component of children and adolescents' intelligence and a source of individual differences. The status of selective attention of children and adolescents in China is not optimistic. In foreign countries, coordinated bilateral movement can help improve children’s and adolescents' attention. The fact that Chinese parents, schools, and society know little about coordinated bilateral movement, teachers in Chinese physical education and health programs almost never intentionally train students in this area.

Objectives: The purpose of this study was to explore whether coordinated bilateral exercise can improve the selective attention levels of Chinese children and adolescents, so …

A053: The Immediate Effects Of Cognitively Engaged Physical Activity On Academic Performance Of Children, Ziyu Wang, Liang Hu

International Journal of Physical Activity and Health

Background/Purpose: In order to change the status quo of children's low levels of physical activity due to excessive academic pressure, a large number of studies have explored the improvement of children's academic performance through physical activity interventions without increasing the burden of learning. With the depth of the studies, the focus has been shifted from the quantitative (exercise time, intensity, and frequency) to the qualitative (e.g., type of exercise), and the cognitive stimulation hypothesis has proposed that the cognitive engagement during exercise has a better facilitating effect on children's academic performance, but there is no consistent definition of cognitive engagement …

A105: Correlation Analysis Between Cognitive Style And Judgment Accuracy Of Tennis Umpires In Zhejiang Province, Kairui Cai, Wensheng He

International Journal of Physical Activity and Health

Background/Purpose: The influence of cognitive style on decision-making in sports has always been a hot research direction in sports psychology. As the law enforcers in the stadium, the individual cognitive style of the umpire in the penalty will also affect the results of a game to an extent. This paper studied the accuracy of on-the-spot decision-making judgment of tennis umpires classified by field dependent-field independent cognitive style and provided a new idea and scientific method for the selection and cultivation of tennis umpires.

Methods/Design: In this experiment, literature method, experimental method, mathematical statistics, logical analysis method and other related research …

A114: Effect Of Four-Way Boxing Exercise On Cognitive Flexibility Of High School Students With Depression Tendency, Tongtong Hao

International Journal of Physical Activity and Health

Purpose: In recent years, depressive symptoms are more prominent than other psychological problems among Chinese high school students. Cognitive flexibility impairment is one of the important cognitive impairments in depression. The four-way boxing practice has the characteristics of rich content of action and various forms of practice.

Methods: This study used the method of literature, mathematical statistics, questionnaire and experiment, and four-way boxing practice as the intervention.

Results: The total score of the cognitive flexibility scale was negatively correlated with the scores of the self-rating depression scale (all P’s < 0.05). The cognitive flexibility of high depression prone high school students was significantly lower than that of low depression prone high school students. The results showed that: (1) In the self-rating depression scale, the total score of the experimental group was significantly lower than that of the pre-test (P < 0.05), but there was no significant change in the control group; (2) In the cognitive flexibility scale, the total score and the controllable subscale scores of the experimental group were significantly higher after the test than before the test (P < 0.05), and the scores of the selective subscale after the test were significantly higher than before the test (P < 0.05), but there were no significant changes in the control group; (3) In Stroop color word test, the post-test response of the experimental group was significantly lower than that of the pre-test (P < 0.05), while the control group had no significant change (P > 0.05); In the Wisconsin card test, the reaction time of the …

A120: Analyzing The Relationship Between Physical Fitness Test Results And Yplq Scores In Chinese Adolescents, Yuhan Jiang, Xiaotong Dai

International Journal of Physical Activity and Health

Background/Purpose: As the future pillars of the country, the physical fitness level of our junior high school students and high school deserves to receive attention as the cornerstone of their study and life. As a part of China's national physical fitness monitoring, student physical fitness monitoring can reflect the current situation of students' physical fitness and health in a more objective way. The Youth Physical Literacy Questionnaire (YPLQ), as a physical fitness assessment tool, can reflect the physical fitness of youth. In this study, descriptive statistics and correlation analyses were conducted to investigate the correlation between the physical fitness scores …

A128: Research On Safety Risk Management Of Youth Short-Term Swimming Training, Donghua Zhou

International Journal of Physical Activity and Health

Purpose: Through the investigation and analysis of the current situation of safety risk management in short-term swimming training for teenagers, to put forward strategies and suggestions for risk prevention and risk management, to improve the awareness of safety risk prevention of swimming training managers, instructors and participants.

Methods: Literature analysis, interview, questionnaire and mathematical statistics were used.

Results: It was discovered that there were many security risks in the management of short-term swimming training for teenagers: (1) There are security risks in the management of swimming venues and facilities. (2) The lifeguard qualifications do not meet the required standards. (3) …

A163: Analysis And Prospects Of Youth Sports For The Disabled In China, Ruifeng Ni

International Journal of Physical Activity and Health

Purpose: Based on the White Paper on the Development of Sports and Protection of the Rights of the Disabled in China published by the Information Office of the State Council, and referencing the Opinions of the Ministry of Education on Deepening the Integration of Physical Education and Sport and Promoting the Healthy Development of Young People, this paper investigated the current state of sports participation among young people with disabilities in China. It analyzed the challenges hindering its development and proposed solutions.

Methods: This study examined youth with disabilities, their caregivers, and families across five provinces and cities, including Jinhua …

Primary And Secondary Resonances Of Fringe Effect Electrostatically Actuated Mems Cantilever Resonators, Miguel Armando Martinez

Theses and Dissertations

The nonlinear dynamics of micro-electromechanical system (MEMS) cantilever resonators actuated by the fringe field at parametric and primary resonances are studied. Three models are used based on different descriptions of the system capacitance. In the fringe and capacitance models, the electrostatic force due to the parallel-plate capacitance is neglected due to a hole in the ground plate (removes overlapping area). The SolidWorks model is based on numerical capacitance simulations performed on SolidWorks using EMS. All three models that approximate the fringe field capacitance are compared with one another. The Method of Multiple Scales (MMS) and Reduced Order Model (ROM) up …

Understanding The Influence Of Traffic And Noise On The Wildlife Community Surrounding Fm106 And Sh100 In South Texas, Anna Rose Mehner

Theses and Dissertations

In South Texas, highways create landscape fragmentation, habitat degradation, and result in wildlife vehicle collisions. Vehicle collisions are the highest known cause of mortality of the endangered ocelot (Leopardus pardalis), which led Texas Department of Transportation to install nine wildlife crossing structures (WCS) on Farm-to-Market 106 and five on State Highway 100. These highways are along Laguna Atascosa National Wildlife Refuge, which is the location of the southernmost breeding population of ocelots in the United States. Many other wildlife species including bobcat (Lynx rufus) and coyote (Canis latrans), are present along these highways and …

Structure Modifications And Alternative Monitoring Designs Of Wildlife Road Mitigation Structures, Madison T. Nadler

Theses and Dissertations

Wildlife mitigation structures are designed to keep animals off roadways while providing them safe passage to the other side and not impeding traffic flow. Camera traps are commonly used to assess the success of these mitigation structures, but there are downfalls to both the methods and structures. Alternative mitigation structure designs are needed to better prevent wildlife from accessing roadways in areas where they should be deterred. Additionally, traditional camera trapping methods do not accurately capture the full wildlife communities that may be utilizing these structures and other survey methods are needed, specifically aimed at small mammals, amphibians, and reptiles. …

Technical Potential And Challenges For Agrivoltaic Development In Nigeria, Ifeoluwa Ezekiel Babarinde

Theses and Dissertations

The co-location of agriculture and solar photovoltaic (PV) infrastructure, known as agrivoltaics, is an increasingly popular practice that offers co-benefits like reduced plant drought stress and improved yields of shade-tolerant crops, particularly in water-scarce agricultural regions. Despite its global growth, knowledge on the technical potential, opportunities, and challenges for agrivoltaic development remains limited in the Global South. Here we address this knowledge gap for Nigeria, Africa’s most populous country, by identifying high-potential regions based on the premise that agrivoltaic co-benefits are generally most pronounced in arable lands with both high solar irradiation and water stress. We find that northern regions, …

Guiding Wildlife: Evaluating Wildlife Exit Designs And Sensor Lights For Safer Highways In South Texas, Rupesh Maharjan

Theses and Dissertations

Roadside exclusionary fencing is more prevalent on highways to prevent wildlife-vehicle collisions. Although it can mitigate wildlife road mortality by limiting their access to the road, it can also create a barrier for wildlife stranded within the right-of-way. In State Highway 100 of Texas, the Texas Department of Transportation installed ten wildlife exits to allow wildlife to escape the fenced roadway, and a pair of sensor lights on 13 wildlife guards (WGs) to scare off target species (bobcats and coyotes) from crossing the guards and accessing the roadway. In this study, the effectiveness of three wildlife exit (WE) designs were …

Implementing Organic Fertilization Practices To Improve Aloe Vera Growth And Soil Health In The Lower Rio Grande Valley, Isaiah Edward Jaramillo

Theses and Dissertations

Aloe vera (L.) (Aloe) Burm. f., is valued for its applications across the cosmetic, medicinal, and food industries due to its leaf gel. In the aloe industry, the extraction of gel from leaves generates significant quantities of organic waste, which presents an opportunity to repurpose this material as an amendment in aloe cultivation. While Aloe is renowned for its resilience, understanding the feasibility of using these organic shavings as a soil fertility amendment in aloe production is critical. This research aims to identify sustainable fertilization methods for Aloe that can maintain and/or improve crop yield while enhancing soil health. This …

Proof Of Concept: Simulating Drone Tracking In A Border Security Context, Jose Ruben Espinoza

Theses and Dissertations

Worldwide availability of drone technology has risen to unprecedented levels within the past century due to its commercial availability. While there has been various positive applications of such technology, it has additionally found usage within security critical contexts. Specifically, there have been reports of illegal drug smuggling along the Mexico-United States border in which quadrocopter based drones have been used. Within our research we aim to showcase, as a proof of concept, that autonomous drone technology can be leveraged within a defensive approach via the usage of reinforcement learning and object detection for security critical contexts. To promote the importance …

A Nursery Study Of The Interplay Between Soil Texture, Rooting Space, And Nurse Plants On Seedling Growth And Root Development In Woody Species Of Tamaulipan Thornscrub, Lance I. Santos

Theses and Dissertations

Reforestation attempts in semi-arid regions are plagued with seedling mortality. Blanket greenhouse practices may not be optimal, in addition, commensalism interactions between nurse plants are considered. To better understand the effects of soil texture and nurse plant interactions on growth and drought tolerance, two experiments were developed. For soil texture, Border palo verde seedlings were grown in different-sized plant bands with three soil types. To observe the effects of nurse plants, an experiment using guayacan, was developed using Texas Ebony, as a leguminous nurse plant. Plants were also exposed to a drought experiment. The results suggest that some soil textures …

Evaluation Of Polymerization Condition Reactions Of Methyl Vinyl Ketone For Hydrogen Storage, Rituborna Ghosh

Theses and Dissertations

Hydrogen is widely regarded as one of the most promising clean alternative fuel sources; however, its widespread adoption has been hindered by significant challenges related to storage and transportation. Various storage methods have been proposed and developed, with continuous advancements being made to address these issues. Among the most effective solutions is the utilization of polymers, which serve as safe and efficient hydrogen storage media. This work investigated the polymerization of methyl vinyl ketone using different ratio of monomer: initiator and monomer: crosslinker using N,N′-methylenebisacrylamide (MBA) as crosslinker and ammonium persulfate (APS) as initiator in a free radical polymerization mechanism. …

Theoretical Insights And Analysis Into Luneburg Lens, Aram Flores

Theses and Dissertations

Advancements in wireless communications necessitate innovative antenna designs for radar systems and satellite communications. The Luneburg lens, theorized by Rudolf Luneburg in 1944, is a gradient-index lens capable of focusing electromagnetic waves onto a point on its surface, offering potential improvements in antenna gain and performance. Access to the lenses, courtesy of Assured Space Access Incorporated, enabled me to research the lenses response, and specific design details remain confidential. Practical assessments of 3D-printed Luneburg lenses of varying sizes are limited, including factors such as lens alignment and focal point offset. This study investigates the performance of 6-inch and 13.25-inch Luneburg …

Student Loan Debt Disparity Among White, African American And Hispanic Women: A National View, Arnoldo Trejo

Theses and Dissertations

Published research into the student loan debt problem reveals a disproportionate impact on underrepresented groups within higher education, notably Hispanics, African Americans, and women students. Research on student loan debt underscores that lower-income and first-generation college students are significantly more affected when compared to their higher-income counterparts. The escalating trends in student loan debt are forcing college-going students in the United States to postpone major life events such as homeownership, marriage, and starting a family. The burden of high student debt negatively influences the accumulation of family wealth, including critical aspects such as home ownership, retirement savings, investments, and other …

Online Learning Communities And Secondary Educators' Tech-Enhanced Instructional Practices: A Correlational Study, Oscar R. Carrera

Theses and Dissertations

This correlational study investigated how secondary educators' engagement in online learning communities relates to their tech-enhanced instructional practices, a relationship that gained importance following the COVID-19 pandemic's acceleration of educational technology adoption. Through the lens of Keller's ARCS Model of Motivation (Keller, 1987) and demographic analysis, the research examined three key aspects: the relationship between community engagement and tech-enhanced instructional practices, demographic predictors of engagement, and correlations between ARCS motivational components and engagement. Data collected through a cross-sectional survey of 115 secondary educators revealed a statistically significant moderate positive correlation between engagement in online learning communities and tech-enhanced instructional practices. …

Enhancing Educator Technology Skills In The Digital Age: A Comparative Analysis Of Video And Screenshot Microlesson Professional Development, Brittni Knebel Kalich

Theses and Dissertations

This study examined video and screenshot microlesson formats as a technology professional development for enhancing educators’ technology skills. As educators face increasing demands for technology proficiency in the twenty-first century classroom, this study was conducted to help address a need for further investigation into whether screenshot or video microlessons can serve as effective PD tools for teachers (Bowman, Vongkulluksn, Jiang, and Xie, 2020). Using a comparative design, this study evaluated three groups: one receiving video microlessons, another receiving screenshot-based microlessons, and a control group receiving no lesson. Data were collected through post test scores (multiple choice questions), a Likert-scale survey, …