Digital Commons Network^™

Evolving Adaptive Foraging Robot Swarms With Neat In Environments With Obstacles, Tameem Uz Zaman, Pigar Biteng, Qi Lu

Computer Science Faculty Publications

We apply NeuroEvolution of Augmented Topologies (NEAT) to evolve adaptive and efficient swarm foraging behaviors in unknown environments with randomly placed obstacles. By rewarding effective actions and penalizing inefficient ones using the proposed strategy P-NeatFA, the training generates efficient foraging and obstacle avoidance strategies, reducing redundancy and outperforming traditional stochastic foraging algorithms. Optimization is guided by cumulative reward-based fitness, evaluated through simulations involving three types of distributed resources. Foraging performance is assessed in terms of resource retrieval rates. We compare the performance of our proposed P-NeatFA with that of CPFA and NeatFA. Experimental results show that P-NeatFA significantly outperforms the …

Wildfires Classification In Canadian Boreal Forest: A Comparative Study Of Logistic Regression And Xgboost Models, Brandon Tran, Elijah James Duran, Mike Luu, Hesham Morgan, Surendra Maharjan, Wenzhao Li, Hesham El-Askary

Mathematics, Physics, and Computer Science Faculty Articles and Research

In recent years, Canada has faced a growing number of wildfires. These events have devastated ecosystems, displaced communities, and posed severe health risks. To minimize the damage caused by such disasters, this study aims to develop an early warning system that predicts wildfire occurrences. Two machine learning models for binary classification of wildfire occurrence in Canadian wild forests, Logistic regression and XGBoost, will be compared and evaluated. The models are used to predict the likelihood of wildfire events based on various environmental and climatic factors. The models are evaluated using a 70-30 split validation approach and their performance is assessed …

Decoding Teleconnection Impacts On Hydrological Switches In The Conus Using Wavelet Analysis, Surendra Maharjan, Wenzhao Li, Shahryar Fazli, Hesham Morgan, Hesham El-Askary

Mathematics, Physics, and Computer Science Faculty Articles and Research

Hydrometeorological teleconnections are key drivers of hydrological processes, representing the influence of large-scale atmospheric circulation patterns on regional climates. Understanding these teleconnections provides crucial insights into the mechanisms underlying hydrometeorological phenomena, particularly hydrological switches—rapid transitions between extreme events such as droughts and floods. These switches have become increasingly prevalent across the contiguous United States (CONUS), fueled by climate variability and evolving atmospheric patterns. This study utilizes cross-wavelet transform analysis to examine the spatial and temporal dynamics of hydrological switches and their correlations with major teleconnection indices, including NAO, ONI, WP, PDO, PNA, and QBO. The findings indicate significant coherence between …

Does Teach Lead To More Teachers? Evaluating The Effects Of The Federal Teach Program, Daniel Sparks

Counseling, Leadership, and Research Methods Faculty Publications and Presentations

Teachers are critical to education production. Yet, recruiting and retaining teachers has remained challenging, particularly in high need fields, at schools serving a high proportion of students from low-income backgrounds, and from racially diverse backgrounds. To incentivize enrollment in teacher preparation programs and to support teacher candidates through degree completion, the federal government implemented the Teacher Education Assistance for College and Higher Education (TEACH) Grant in 2008. The TEACH Grant offers undergraduate and graduate students up to $16,000 and $8,000 in grant aid, respectively, to pursue degrees in high need teaching fields. I use difference-in-differences analyses to estimate the effects …

Multi-Theoretic Perspective Of Backer Decision-Making In Crowdfunding: Interplay Of Backer, Founder And Ai, Maliha Alam

Theses and Dissertations

Crowdfunding has become a transformative mechanism for financing innovation, connecting creators directly with backers while bypassing traditional funding barriers. Despite its rapid global growth, only about 33.7% of campaigns succeed, largely due to ineffective communication of value propositions and lack of backer engagement. This dissertation investigates the complex interplay between project founders, backers, and emerging AI technologies to understand the factors influencing donation intention and to enhance crowdfunding success prediction.

Adopting the behavioral decision-making framework, I draw on multiple theoretical perspectives- signaling theory, the dual-process model of persuasion, and the cognitive-affective trust framework to examine founder- backer interactions. Using a …

Analyzing How Taste And Nutrition Impact Learning And Memory In Honey Bees Through Olfactory Associative Conditioning, Alessandra Elizabeth Perry

Theses and Dissertations

Honey bees detect sweet nectar, but not all sweet-tasting sugars provide nutrition. Unlike fruit flies, which can learn to avoid non-nutritious sweet foods, bees may lack this ability. To test if bees form caloric frustration memory (CFM), we conditioned them using odors paired with L-glucose (sweet but non-nutritious) or D-glucose (sweet and nutritious). Bees rewarded with L-glucose showed lower learning and long-term memory compared to D-glucose. Bees cannot differentiate between an odor associated with rewards containing malaise-causing compounds and an odor associated with a reward alone during differential conditioning. Therefore, we used differential conditioning to determine if lower acquisition in …

The Abduction Of Juan Manuel Fangio And Its Impact On The Cuban Revolution, Shalom Nissi Ramirez

Theses and Dissertations

On February 23, 1958, Juan Manuel Fangio, the five-time Formula One Champion, was kidnapped by the 26th of July Movement (M-26) in Havana, Cuba, during the Cuban Revolution. The kidnapping took place on the eve of the Havana Grand Prix as an act of sabotage against Fulgencio Batista's government. Fangio's abduction became a symbol of political resistance, challenging Batista's authority and raising the profile of M-26 as a revolutionary group. This thesis examines how the incident, amplified by worldwide media coverage, influenced international perceptions of the Cuban Revolution. It argues that using Fangio’s fame strategically helped accelerate awareness of the …

High Flying Adored: How Ceo Narcissism Influences Firms’ Responses To Above-Aspiration Performance With Risky Organizational Change, Korcan Kavusan, Daniel Mack, Matthew P. Mount, Gokhan Ertug

Research Collection Lee Kong Chian School Of Business

Research Summary: Research on performance feedback presents conflicting views on how above-aspiration performance influences organizational change. Some studies argue that it constrains change due to a lack of organizational motivation, while others suggest that it enables change by expanding managerial discretion. Reconciling these perspectives, we suggest that managers’ narcissistic tendencies can fundamentally alter how a firm responds to above-aspiration performance. We theorize and find evidence that high-narcissism CEOs respond to above-aspiration performance with more acquisitions—attention-generating actions that align with their self-enhancement motives, while under similar conditions low-narcissism CEOs avoid acquisitions, due to their uncertainty and risk. Our findings highlight the …

The Back Page: Hospital General Dentistry: Needed Now More Than Ever, Tanaya K. Porter Dds, Craig C. Spangler Dds

The Journal of the Michigan Dental Association

This commentary emphasizes the increasing necessity of hospital-based general dentists. Historically, dentists faced challenges for privileges in hospitals, but today they are crucial, especially for neurodivergent adult patients and those with complex chronic illnesses requiring general anesthesia for dental care. Untreated oral issues can lead to severe infections, complicating acute medical conditions and threatening the success of life-saving surgeries like organ transplants. Hospital dentists provide vital pre-surgical evaluation, diagnosis, and follow-up care to prevent dental complications and improve patient quality of life post-surgery. Despite their critical role, the article highlights a concerning trend of fewer hospitals having general dentists on …

Collaboration In Action: An Exploration Of Collaborative Practice-Based Learning In Perservice Teacher Coursework, Logan W. Qualls

All Dissertations

New teachers report not feeling prepared to effectively collaborate with other professionals and families; however, collaboration is a large component of their day-to-day work. Thus, there is a need for teacher preparation programs to incorporate instructional methods that provide preservice teachers with opportunities to not only learn about the concept of collaboration but also to put those skills into place prior to entering the classroom. One possible answer to this need is to incorporate practice-based learning. Practice-based learning has been shown to effectively increase skill implementation for instructional and behavior management strategies; however, there is a lack of research regarding …

Chemical & Electromagnetic Signatures Of Binary Neutron Star Mergers, Benjamin Amend

All Dissertations

Binary neutron star (BNS) mergers are some of the most energetic events in the universe, producing both short gamma-ray bursts (GRBs) and kilonovae. GRBs are brief, bright flashes of gamma rays, powered by ultra-relativistic jets launched during the merger. These jets produce a prompt burst of gamma rays, followed by a broadband afterglow generated by external shocks as the outflow interacts with the surrounding medium. Kilonovae are optical-infrared transients from the radioactive decay of heavy, neutron-rich nuclei formed through the rapid neutron capture process (r-process) in the merger ejecta. Together, GRBs and kilonovae provide unique laboratories for probing fundamental physics …

Robust Online Inertia Estimation In Power Systems Using Ambient Data In The Presence Of Inverter-Based Resources, Narges Ghiasi

All Dissertations

The increasing penetration of Inverter-Based Resources (IBRs) in power systems has significantly altered system dynamics, reducing the system's effective rotational inertia and challenging frequency stability. Accurate online inertia estimation is essential for maintaining system reliability under these evolving conditions. This paper introduces a robust methodology for online inertia estimation using ambient data collected during normal system operation. The proposed method employs a state-space model to represent system dynamics and introduces synthetic step changes to simulate disturbances. By analyzing the frequency response and applying advanced signal processing techniques, the methodology estimates system inertia without requiring real large-scale disturbances. The approach is …

Resilient Control Framework For Ev Motor Drive System Subject To Cyber-Physical Security, Ali Arsalan

All Dissertations

The electric drive system (EDS) in electric vehicles (EVs) is one of the key safety-critical components. As IoT-enabled communication infrastructure for modern cyber-physical automotive systems continues to evolve, the importance of securing EDS against cyber threats along with physical faults, has become increasingly prominent. Among physical faults, power switches are particularly vulnerable and exhibit the highest susceptibility to open-circuit faults (OCFs). A compromised EDS, whether due to cyber threats or physical issues, can lead to excessive mechanical vibrations, increased thermal stress, fluctuations in electromagnetic torque, and elevated total harmonic distortion. These factors can substantially undermine traction control stability and jeopardize …

Using Parent Empowerment Groups To Increase Academic Success In Kindergarten Multilingual Learners, Sarah C. Deloach

All Dissertations

This study examined how parent empowerment groups influence the academic success of kindergarten multilingual learners. With increasing immigration across the United States, schools need to work with families to ensure students develop the skills required for academic achievement at each level. The identified problem is that the current multilingual learner program at Boyd Matthews Elementary does not adequately meet parents’ needs in building a strong home-school connection, placing the full responsibility of learning on the school and leaving students without critical academic support at home. Parent empowerment groups were held with multilingual kindergarten parents to share practical strategies for supporting …

The Influence Of Past Experiences On Middle School Band Directors’ Instructional Practices, Jessie Lynn Peterson

All Dissertations

This qualitative study investigated the influence of middle school band directors’ past experiences on their instructional decision-making and implementation of culturally relevant pedagogy (CRP). Embedded in Ladson-Billings’s (1995, 2014) CRP framework and Lortie’s (1975) apprenticeship of observation theory, this study explored the relationship between middle school band directors’ past experiences, their beliefs about CRP, and their instructional practices.

Music education in the United States has historically focused on Western European classical traditions that overlook the cultural diversity of today’s students and reinforce dominant pedagogical norms. Semi-structured interviews were conducted with six middle school band directors. Participants discussed their musical backgrounds, …

Designing Self-Healable Aromatic Copolymers And Olefinic Composites, Samruddhi Yashwant Gaikwad

All Dissertations

Self-healing polymers capable of recovering from mechanical damage are promising materials for advanced applications, especially those involving mechanical and/or physical fatigue. In these studies, we have developed techniques to achieve autonomous self-healing in commodity Styrene/n-butyl acrylate copolymers. The mechanism of self-healing in the designed polymers involves inter-and/or intrachain non-covalent interactions between π-cloud and polar linkages of acrylic nBA in random/preferentially alternating copolymers. A combination of spectroscopic tools, thermo-mechanical analysis, and molecular dynamics (MD) simulations has been used to elucidate the mechanism of self-healing. These studies further show the incorporation of dipolar C-F groups to understand the effect of having fluorinated …

Like Footprints In The Sand: How Founders Imprint Organizational Culture Through Nonverbal Cue Signaling, Dirk M. Roskam

All Dissertations

Despite growing recognition of the significance of founders’ behaviors in shaping organizational culture, limited research has explored how founders’ non-verbal cues (NVCs) imprint culture during a venture’s formative stages. This qualitative case study examines how a founder’s NVCs, ranging from physical environment design to gestures and demeanor, are interpreted by employees and contribute to the imprinting of organizational culture. Drawing on imprinting theory, signaling theory, and the Organizational Culture Profile (OCP), the study triangulates data from semi-structured interviews, a focus group, and a literature review. Findings reveal that employees interpret 24 salient NVCs, grouped into themes of environmental values, people-centric …

White Secondary Social Studies Pre-Service And First Year Teachers’ Emotions Surrounding Topics Of Race In Light Of Current Censorship Laws, Noble M. Edmisten

All Dissertations

This study aimed to identify the varied emotions of white, pre-service and first year secondary social studies teachers when facing the possibility of teaching topics of race, especially in the current “anti-CRT” political climate. Using Critical Race Theory and Plutchik’s Wheel of Emotion as a guiding framework, this exploratory, multiple case study employed a variety of qualitative data collection methods and analysis practices. The cross-case analysis, using Constant Comparative Analysis, identified six common themes across the individual cases. The findings revealed that white pre-service and first year secondary social studies teachers believed race was impacting every area of life, they …

Toward A Unified Theory Of Fire-Induced Spalling Of Concrete: Transcending Domain Knowledge Limitations Through Explainable Artificial Intelligence, Causal Discovery And Inference, Mohammad Al Bashiti

All Dissertations

When concrete is exposed to fire, it can suddenly break apart in a dangerous process called spalling. This can severely weaken buildings and even trigger a collapse. While researchers have studied this problem for years, we still don’t fully understand what causes it. My research uses a combination of data, and advanced AI techniques to identify and quantify the key factors that increase the risk of spalling. I collected data from over 1,000 fire tests and used AI models to predict when spalling might happen. I also applied explainable AI tools to understand why it happens.

The results showed that …

The Intersection Of Makeup And Recreation: A 21st Century Overview Of Makeup Participation And Its Recreational Benefits, Jason Morgan

All Dissertations

This dissertation critically reconceptualizes makeup participation as a legitimate, multidimensional form of recreation. Through a comprehensive rapid review using the SPIDER framework of 102 peer-reviewed studies published between 2000 and 2025, the research investigates whether and how makeup fulfills the psychological, affective, and symbolic criteria of meaningful leisure. Drawing on the Serious Leisure Perspective (SLP) and broader recreation theory, the study positions makeup not merely as aesthetic behavior or consumer habit, but as a sustained, emotionally generative practice embedded in identity, creativity, personal growth, and well-being.

Findings reveal that makeup is consistently linked to confidence-building, emotional regulation, self-expression, and psychological …

Evolutionary Biomechanics In Cetartiodactyla: Impacts Of Ecological Shifts On Bone Material Properties And Control Surface Morphology, Danielle S. Adams

All Dissertations

Extreme ecological transitions expose organisms to novel selective pressures that can reshape morphology and performance. This dissertation investigates how the transition from land to water has influenced form and material properties in cetaceans (whales, dolphins, and porpoises), a clade that has undergone dramatic morphological and physiological adaptations to a fully aquatic lifestyle. I integrate comparative morphology, material property testing, and phylogenetic analyses, to explore how ecological demands, particularly related to foraging mode and prey detection, have shaped multiple aspects of cetacean morphology and function. Using nanoindentation and microCT, I measured elastic modulus and bone density of the skull and mandible …

Experimental Design And Analysis For Decision Making: Methodology And Applications, Yezhuo Li

All Dissertations

This dissertation develops and applies advanced statistical and optimization frameworks to enhance decision-making under uncertainty, particularly in engineering and manufacturing contexts. First, we introduce an approach for the optimal design of controlled experiments that accounts for observational covariates, enabling more precise and personalized decisions. Second, we explore the application of constrained Bayesian optimization, using Gaussian process surrogate models, to optimize composite cure processes, significantly reducing computational effort while maintaining high predictive accuracy. Building on this foundation, we extend Bayesian optimization to bivariate Gaussian process models that capture correlations between objective and constraint functions, offering new insights into multidimensional decision landscapes. …

Structural Design Using Conditional-Gan Fused With Property Text Information: A Case For Masonry Structures, Arash Teymori Gharah Tapeh

All Dissertations

Structural design, by nature, is a complex process that requires a considerable amount of time, expertise, and knowledge. In such a process, the structural designer must navigate various codal provisions to crystallize a proper and adequate design. As the role of automation continues to shape the domain of structural engineering over the past few decades, a new front leverages artificial intelligence (AI). Currently, AI acts as a "copilot," collaborating to advance workflow speed and accelerate the design process. Among all the different collaborations between humans and AI, GANs (Generative Adversarial Networks) are seen to complement human creativity by automating specific …

The Dark Side Of Great Lmx Relationships: Why Your Best Employees Might Be Burning Out, Ryan Toole

All Dissertations

While workplace relationships are widely considered beneficial for employee well-being, a paradox emerges when employees with the strongest leader relationships experience burnout despite receiving excellent support. This contradiction suggests that these very same relationships may create psychological pressure to reciprocate support and result in employee burnout. Drawing on Social Exchange Theory and Conservation of Resources theory, I examine whether felt obligation resulting from Leader-Member Exchange (LMX) relationships contributes to employee burnout across the full spectrum of LMX quality relationships. I argue that LMX quality creates felt obligation to reciprocate leader support. This obligation, in turn, depletes emotional resources and leads …

Communicators In Crisis: Lessons Learned From Communications Professionals During The Great Resignation, Julia K. Longaker

All Dissertations

This study investigated the experiences of communication professionals who participated in the Great Resignation phenomenon between 2020-2022. The research questions focused on the role participants’ working relationship with leadership as it related to their decision to leave their role or pursue a new job. Ten communication professionals participated in a qualitative study comprising of an online interview discussing their experiences during the Great Resignation. Using the interview transcripts, the researcher employed grounded theory to extract recurring codes and draw conclusions based on the participants’ answers. The results of this study inform recommendations for improved working relationships between communication professionals and …

Submissive Daughters, Empowered Daughters: Conduct Rhetoric And Evangelical Women’S Authority, Carrie Hill

All Dissertations

Submissive Daughters, Empowered Daughters: Conduct Rhetoric and Evangelical Women’s Authority explores how evangelical women rhetors navigate and rework patriarchal religious expectations through what I term conduct rhetoric. Building on the tradition of conduct literature, this project broadens the genre to include multimodal platforms—literature, radio/podcasts, television, and social media—used to instruct women in evangelical norms. Rather than passively accepting patriarchal constraints, evangelical women rhetors strategically adopt and reframe these constraints to construct rhetorical authority. Central to this study are two terms: affected piety and performative dissonance. Affected piety describes how women rhetorically present submission as the grounds for their …

Bilevel Network Interdiction Models For Human Trafficking Disruption, Daniel Bruno Lopes Da Silva

All Dissertations

In this dissertation, we study a series of bilevel network interdiction problems motivated by applications in human trafficking disruption. First, we consider a bilevel network interdiction problem where the follower aims to maximize the amount of flow from the source node to the sink node and the leader aims to minimize the number of arcs from a critical set that have positive flow on them in the solution obtained by the follower. This problem models the situation where an anti-trafficking agent wants to minimize the number of people affected by the trafficking operations whereas the trafficker wants to maximize trafficking …

Application Of Artificial Neural Network Algorithms For Irrigation Scheduling, Lisa Umutoni

All Dissertations

Neural networks have been extensively used in predicting soil water tension for improved irrigation scheduling and management. However, their lack of interpretability constrains their efficacy in grasping the nuanced patterns prevalent in soil water tension time series data. The first goal of this research was to develop interpretable deep neural network models for soil water tension prediction across multiple soil depths (0.15m, 0.3m, 0.46m and 0.6m) and prediction horizons (1h, 6h, and 12h). The Neural Hierarchical Interpolation for Time Series (N-HiTS) and Neural Basis Expansion Analysis Time Series (N-BEATS) models were used in this research. Historical soil water tension data …

Assessing The Mental Health Benefits Of A School-Based Urban Gardening Program In Kosova, Imri Zabeli

All Dissertations

ABSTRACT

This study investigated the mental health benefits of a school-based urban gardening program for primary school students in Kosovo, where there is limited access to psychological support within educational settings. A quasi-experimental pretest-posttest control group design was employed, involving 112 students aged 9 to 11 from two public schools in Pristina, who were divided into an intervention group (n = 56) and a control group (n = 56). The intervention group engaged in an 8-week structured gardening program, while the control group followed the standard curriculum. Psychological outcomes were assessed using validated instruments, including the Perceived Stress Scale for …

Constructing A State: Canals And The Transformation Of The Economy, Politics, And Finance In Nineteenth-Century New York, Youwei Xing

All Dissertations

This dissertation consists of three essays in economic history, unified by a focus on one of America's earliest transportation infrastructures, the canal system, in nineteenth-century New York. Each chapter explores a different aspect of the state's transformation: its economy, politics, and finance, each of which helped construct New York as the Empire State.

The first chapter studies the economic impact of canals on economic modernization from three aspects: sectoral transition, urbanization, and banking development. Contrary to much of the modern literature finds transportation infrastructure leads to decentralization, I find the opposite-evidence of centralization. Specially: (1) canal towns experienced a transition …