Digital Commons Network^™

Record Number Of Students Enter Top Stem Phd Programs, Anthony Bosman

Lake Union Herald

No abstract provided.

Serious Games And Complex Thinking: A Study On Gender Differences And Study Discipline In University Students, María Soledad Ramírez‑Montoya, Carolina Alcantar-Nieblas, Leonardo David Glasserman-Morales

Artículos científicos

Serious games are a fundamental tool to promote learning in a playful way and to develop a wide range of cognitive skills such as complex thinking. In this study we sought to first analyze the perceived achievement of complex thinking sub-competencies by majors, and we also aimed to investigate mean differences in the group of students coming from computer science and engineering related majors and by gender of the participants in complex thinking subcompetencies. 417 learners were part of this study, of which 65.7% were male and 34.3% were female. It was found that medical students perceived higher achievement in …

Perturbation Solution Of Air-Water Mixture For Jet Noise Reduction, Juan Felipe Uribe Cifuentes

Doctoral Dissertations and Master's Theses

This work investigates passive jet-noise mitigation using externally positioned air–water curtains that attenuate radiated sound without altering the underlying jet dynamics. Two classes of multiphase media are examined: a gaseous carrier phase containing dispersed liquid droplets, and a liquid carrier phase containing entrained air bubbles. For both systems, suspended and dispersed regimes are represented through a generalized perturbation formulation derived from the volume-averaged multiphase equations, incorporating finite volume fractions, interphase momentum coupling, and slip between phases. Analytical and numerical solutions demonstrate that acoustic attenuation is primarily governed by dispersed-phase diameter, volume fraction, and excitation frequency, with additional sensitivity to phase-interaction …

A Study In Object Detection And Classification Performance By Sensing Modality For Autonomous Surface Vessels, Daniel Lane

Doctoral Dissertations and Master's Theses

This research presents a quantitative performance comparison between light detection and ranging (LiDAR) and vision-based sensing for real-time maritime object detection on autonomous surface vessels. Using Embry-Riddle Aeronautical University’s (ERAU) Minion platform and 2024 Maritime RobotX Challenge data, this study evaluates the detection of six maritime object categories using two representative models. YOLOv8 provides a neural network vision-based method, and GB-CACHE provides a deterministic LiDAR-based method. Both models have been previously demonstrated to run in real time on uncrewed surface vessels (USVs). The evaluation methodology encompasses multi-sensor calibration, real-time performance analysis, and the introduction of a late-fusion strategy in the …

Leveraging Machine Learning And Causal Inference For Loan Default Prediction, Luca Guida

Doctoral Dissertations and Master's Theses

This research explores a systematic application of machine learning techniques combined with causal inference to predict loan defaults in peer-to-peer lending. Accurately forecasting loan defaults is crucial for mitigating financial risk and optimizing lending strategies. This analysis is based on multiple datasets of loan applications spanning over a decade, containing detailed financial and credit information about borrowers. Beginning with extensive Exploratory Data Analysis (EDA) coupled with scaling strategies, the research identifies key trends in loan performance across a large number of factors, such as interest rates or borrower creditworthiness, and one objective is to determine from the many available predictors …

Meshless Discrete Velocity Boltzmann Model For Porous Media Flow, Amandine Maidenberg

Doctoral Dissertations and Master's Theses

This dissertation explores the combination of two sophisticated techniques for addressing computational fluid dynamics: the discrete velocity Boltzmann equation (DVBE) and the localized collocation meshless model with upwinding (U-LCMM). The DVBE is a high-level model that describes the foundations of transport phenomena by addressing the microscale motions of particles themselves and the effect of their aggregate behaviors on continuum principles. This equation integrates multiple scales of phenomena; while it can be used for fluid flow at Navier-Stokes scales, it can also resolve fine features that can only be described at the molecular level. This type of model is necessary for …

Autonomous Landing Of An Unmanned Aerial Vehicle On An Unmanned Surface Vessel Using Model Predictive Control With An Adaptive-Covariance Extended Kalman Filter, Jorge Estupinan

Doctoral Dissertations and Master's Theses

This thesis presents the development of vision-based estimation and model predictive control (MPC) strategies to enable an Unmanned Aerial Vehicle (UAV) to land autonomously on an Unmanned Surface Vessel (USV) subjected to wave-induced motion. An innovative Adaptive-Covariance Extended Kalman Filter (AEKF) implementation was developed for the estimation of the 6 degree-of-freedom USV states using GPS and vision-based measurements of AprilTag markers on the USV landing platform. The AEKF employs an uncontrolled 6 degree-of-freedom nonlinear model augmented with second-order harmonic wave-induced motion dynamics. The AEKF implements two correction techniques: an adaptive covariance adjustment and an artificial covariance inflation regulated by a …

Exploration Of Physics-Informed Grid Generation Technique For Wall-Modeled Les Using Eagle3d, Dominic Schneider

Doctoral Dissertations and Master's Theses

Wall-Modeled Large Eddy Simulation (WMLES) is an area of interest due to its ability to lower computational costs of LES. Even with the application of wall models, LES still proves to have practicality issues when it comes to use in industry, due to the expertise, time, and computational resources required. A novel technique for generating a lean, physics based WMLES grid is described.

The technique utilizes a RANS solution to extract turbulence information, user-specified values related to resolution of turbulent energy levels, acoustics waves, and shock waves, to generate a point cloud for producing a lean WMLES grid with in-house …

Unresolved Image Simulation For Space Situational Awareness Applications, Fox Coniglario

Doctoral Dissertations and Master's Theses

The knowledge of what lies in orbit around Earth is at best a guess. Decades of spaceflight, debris buildup, and vehicle collisions have contributed to a large number of objects that are simply not able to be catalogued. Ongoing efforts to catalog debris in orbit have reached limits by conventional measures and as such, research is active in the field of in-orbit space situational awareness. This thesis intends to help fill a hole in the development of such orbital platforms by assisting the development of image processing software pipelines though the simulation of unresolved space imagery. The simulation uses accurate …

Aligning Aviation Safety Reporting System Anomaly Codes For Crew Communication And Coordination With Human Factors Taxonomies, Jennifer Rose Herr

Doctoral Dissertations and Master's Theses

This study addresses the lack of theoretical grounding and definitions for the Aviation Safety Reporting System (ASRS) anomaly codes, particularly those related to pilot communication and coordination errors. To improve the conceptual consistency and analytical usability of ASRS data, the research developed a framework that maps ASRS codes to three established theory-based human factors taxonomies: the Human Factors Analysis and Classification System (HFACS), Threat and Error Management (TEM), and Aviation Causal Contributors for Error Reporting Systems (ACCERS). The study used qualitative text mining to systematically code communication and coordination errors submitted by Part 121 pilots for a stratified sample of …

Barriers And Best Practices In Diversity, Equity, And Inclusion (Dei) Initiatives: A Case Study From The United States Aerospace And Defense Industry, Jeremy A. Bailey

Doctoral Dissertations and Master's Theses

The main objective of this study was to unpack the barriers around diversity, equity, and inclusion (DEI) initiatives, and then provide best practices to improve DEI efforts in the aerospace and defense (A&D) industry. There has been a multitude of research conducted on DEI in the past few years. However, very little research has focused on DEI practices in the A&D industry. This case study focused on one large company in this industry to explore and understand various aspects of DEI initiative implementation. As organizations strive to meet industry and client objectives, as well as address employee needs, two research …

Active Measurement Of A Micron-Order Gap Under High-Speed And High-Temperature Conditions, Andrew Becker

Doctoral Dissertations and Master's Theses

The hypersonic regime poses numerous challenges that researchers face in the development of hypersonic flight vehicles. Due to their excellent thermomechanical properties, ultra-high-temperature ceramics (UHTCs) have risen as a promising solution to act as a protective barrier between the harsh environment and surface materials of these flight bodies. The mechanical operation of a portable hypersonic simulation device was developed in-house and tested at Argonne National Laboratories (ANL) to gather in-situ material response of prospective UHTC samples when exposed to a hypersonic regime. An edge detection-based algorithm was developed and used in LabVIEW to monitor the health and operation of the …

Monte Carlo Simulation Models To Enhance Air Cargo Network Resilience And Sustainability, Shereen Marie Hashemi

Doctoral Dissertations and Master's Theses

This dissertation focuses on developing and validating an empirical set of simulation models for an air cargo network under large-scale disruption to test recovery strategies that improve resilience. Understanding and quantifying network resilience and recovery strategies is critical for ensuring sustainable operations. These operations become essential during disruptive events as air cargo is used to transport time-sensitive and critical goods. The collective research steps result in a Monte Carlo simulation framework to evaluate air cargo network resilience and identify strategies that enhance performance during disruptions.

The modeled system is a hub-and-spoke network centered on Memphis (MEM) with 23 domestic airports …

Graduate School Blog - October 2025, Cynthia Haynes

UofM Grad School Blog

In this October 2025 blog edition, we explore one of the most underestimated yet decisive elements of graduate school applications: letters of recommendation. A strong, specific, and enthusiastic letter can open doors that grades alone can’t, while a vague one can quietly close them. Learn how to choose the right recommenders, ask the right questions, and set them up for success.

We also spotlight PhD student Sadia Rinty and her journey from Bangladesh to the University of Memphis’s renowned CERI program, share upcoming graduate student events, and celebrate Memphis as a national leader in women-owned businesses. From academic tips …

Active Learning: Eight Models That Shape Instructional Practice, A.E. Dreyfuss, Ana Fraiman, Karmen T. Yu

Publications and Research

Developed since the mid-20^th century, several instructional models have provided practical means to shift the emphasis in learning from lecture to engagement by students. The snapshots of models presented in this paper include Cooperative Learning, Problem-Based Learning (PBL), Supplemental Instruction (SI) (also PALS, PASS), Team-Based Learning (TBL), Emerging Scholars Program (Mathematics Workshop, MathExcel), Peer-Led Team Learning (PLTL), Process Oriented Guided Inquiry Learning (POGIL), and Learning Assistants (LA). These models have been well-disseminated, widely adopted, and incorporated in disciplines beyond their origins. For purposes of exploration and consideration of implementation, these “snapshots” provide an overview. Features of each model are …

The Expanse: Exploring Comparative Mythology In The Mediterranean Through Video Game Development, Michael A. Davis

Senior Theses

This web application, titled The Expanse, explores the arguments surrounding comparative mythology, specifically regarding those in the Mediterranean region. The Expanse is a turn-based role-playing game using the characters and gameplay format of the Shin Megami Tensei video game series. The game depicts the conflict between comparativists and particularists using mythological characters, creating situations in which the player takes sides in a debate that permeates the real world. This story seeks to inform players of the subjective nature of sciences by tying moral dilemmas into an overarching metanarrative specific to comparative mythology.

Compost Grinder For The University Of South Carolina Office Of Sustainability, Rori E. Pumphrey, Grace Yaegel, Aaron R. Sawyer, Bradley White

Senior Theses

This project originates from a collaboration with the USC Office of Sustainability, which seeks to improve the handling and processing of food waste generated on campus. The primary challenge is the difficulty in composting certain types of food waste, such as avocado pits, pumpkin rinds, and other dense or fibrous organic materials that are not easily broken down using conventional methods. Existing commercial solutions are often too large and expensive, or electrically powered, and are thus not well suited for the volume or nature of USC's food waste. To address these limitations, our team designed a manually operated food waste …

The Effect Of Self-Efficacy And Commitment On The Retention Of Alternatively Certified Teachers, Lydia V. Leduc

Doctor of Education (Ed.D)

Teacher attrition has opened the doors for professionals from other fields to enter the teaching field by following an alternative path. Yet, the attrition rate of these alternatively certified teachers (ACTs) is higher than that of traditionally certified teachers (TCTs). The objective of this transcendental phenomenological study was to examine the effect of self-efficacy and commitment on teacher retention of ACTs in Northwest Florida. The participants in the study worked in several schools in the area. After interviews, responses were evaluated, and categories and codes were compiled. Analysis was then done on the frequency and quality of response data to …

The Influence Of Academic Outcomes On Academic Achievement: A Quantitative Study In Grades 3-12, Kelli R. Helle

Doctor of Education (Ed.D)

The purpose of this predictive study was to examine the relationship between social and emotional learning (SEL) subskills and academic performance among students in grades 3–12. Using the Collaborative for Academic, Social, and Emotional Learning (CASEL) framework, the study sought to identify which specific subskills were most strongly associated with student grade point average (GPA). A quantitative predictive correlational design was employed with a sample of 737 students representing diverse grade levels and backgrounds. Data were collected through the Satchel Pulse SEL assessment platform, and hierarchical multiple regression analysis was conducted to determine the predictive value of SEL subskills while …

(Si15-010) On Perturbations Of Gabor Frames, Jamkhongam Touthang

Applications and Applied Mathematics: An International Journal (AAM)

Stability plays a crucial role in frame theory and its applications. The present paper studies the interaction between Gabor frames and perturbations, presenting perturbation results related to small changes of the frame parameters and the window functions both in regular and irregular settings. Examples are provided for illustration. Additionally, the paper briefly discusses algorithms pertinent to Gabor frames under perturbations and highlights challenging areas in the field.

(Si15-121) Analyzing Seitr Tuberculosis Transmission Model Using Caputo–Fabrizio Fractional Derivative With Diverse Contact Rates, S. S. Sumaiya Banu, T. Gunasekar, S. Manikandan, Kamalendra Kumar, M. Suba

Applications and Applied Mathematics: An International Journal (AAM)

In the modern age, tuberculosis remains a pressing global health concern. Our study introduces and evaluates the SEITR pandemic TB transmission model, dividing the population into five compartments to explore distinct characteristics relevant to our investigation. Additionally, we delve into the application of fractional calculus. Through the Laplace transform method, we derive series solutions for all compartments, ensuring their existence and uniqueness. We also investigate the reproduction number of the tuberculosis epidemic model, examining how varying contact rates impact disease spread. We apply the predictor-corrector method for the Caputo-Fabrizio fractional derivative to verify the accuracy of our approach. This accurately …

(Si15-120) Exploring Fractional Difference Equations And Their Applications With Mahgoub-Transform, Tharmalingam Gunasekar, Periyasamy Udhayasankar, Prabakaran Raghavendran, Kamalendra Kumar

Applications and Applied Mathematics: An International Journal (AAM)

We discuss the introduction and study of the nabla discrete Mahgoub transform along with its defining properties. The transform of fractional sums and fractional differences are derived, demonstrating the applicability of the transform from the computational viewpoint. Employing the transform, fractional difference equations with initial value problems are solved, thereby enhancing the knowledge of their closed forms. As a side-effect of the Mahgoub-transforms, an attractive connection is established, showing that the discrete Mittag-Leffler function acts as the eigenfunction for the Caputo-type fractional difference operator nabla. These results strengthen the core basis for fractional calculus and herald industrial applications in various …

Arcadia Magazine, 2025-10

Alumni Magazine

No abstract provided.

The Walking Moai Hypothesis: Archaeological Evidence, Experimental Validation, And Response To Critics, Carl P. Lipo, Terry L. Hunt

Anthropology Datasets

The transport of Rapa Nui's (Easter Island) monumental moai statues has been debated for over a century. Based on a systematic analysis of 962 moai, with a focus on 62 road statues, combined with 3D modeling and experimental trials, we demonstrate that these multi-ton megaliths were designed for transport vertically in a controlled "walking" motion facilitated by their carved shapes. Our evidence includes distinctive morphological features of road moai (wide, D-shaped bases and forward lean), archaeological road characteristics (4.5m wide, concave cross-sections), non-random breakage patterns, and successful experimental validation using a precisely-scaled 4.35 metric ton replica based on road …

E-Governance In Public Institutions: A Systematic Review Of International Studies (2013–2024), Yazen Nahal Mahmood, Hussam Ali Mhaibes, Yousif Al-Dunainawi

Journal of Economics and Administrative Sciences

This study aims to review and compare research related to E-governance in public institutions with the aim of identifying common denominators that increase or decrease its effectiveness and to evaluate the evaluation methods used. By highlighting the factors of success and failure, the study paves the way for future research and links theory to practice. The study question addresses how E-governance is applied differently and similarly in Arabic and foreign studies, in addition to the effects of variables and the methodology used. Our study follows PRISMA rules, ensures quality and transparency of selection, and conducts a comprehensive analysis of research …

The Mediating Role Of Social Responsibility Between Sustainability Accounting And Financial Performance, Basema Hazem Mohammed

Journal of Economics and Administrative Sciences

This research aims to identify the role of sustainability accounting in improving financial performance by adopting social responsibility indicators. The research aims to clarify how social responsibility can contribute to enhancing the financial benefits resulting from sustainability accounting practices, ultimately leading to improved financial performance of companies. A mixed-methods approach was employed to analyse both qualitative and quantitative data.   A random sample of banks listed on the Iraq Stock Exchange was selected for the study, including five banks for a four-year time series, in addition to a sample of specialists for the purpose of answering the axes related to the …

Une Com Research And Scholarship Fall Forum October 2025, Une Com Research & Scholarship

Osteopathic Student Research Symposia

Program including abstracts from the University of New England College of Osteopathic Medicine’s 2025 Research and Scholarship Fall Forum.

Supplemental content: List of award winners.

Columns Fall 2025, Southern Adventist University

Alumni Newsletter

The Fall 2025 issue of Columns features articles about Southern's inaugural Bachelor of Science in Engineering graduates, Homecoming Weekend 2025, notes from God in nature, and service opportunities.

When Evidence Modeling Meets Knowledge Distillation: Towards Reliable Contrast-Enhanced Knowledge Distillation For Non-Contrast Medical Image Segmentation, Shuo Li

Faculty Scholarship

Contrast-enhanced knowledge distillation promises to transform medical diagnostics and reveal promising approaches for tumor segmentation on non-contrast medical images. However, existing methods related to contrast-enhanced knowledge distillation still make it hard to distill reliable contrast-enhanced knowledge for tumor segmentation due to the limitations of (1) unable to quantify uncertainty information for reliable contrast-enhanced and non-contrast knowledge modeling, which leads to an over-confidence cross-domain adaptation for transferring contrast-enhanced knowledge; (2) using vision information only ignores rich semantic features in medical language, which make it hard to model complex tumor enhancement feature. In this study, we propose an evidence-guided and tumor-aware knowledge …

0894: G. W. “Jerry” Sutphin River Transportation Collection, 1832-2024, Marshall University Special Collections

Guides to Manuscript Collections

Gerald W. “Jerry” Sutphin was a nationally recognized river historian from Huntington. He graduated from Mullens High School and Marshall University and became an army officer. Sutphin worked for and retired from the United States Army Corps of Engineers before spending twenty years operating his own business, Visual Information Ltd. The author of Sternwheelers on the Great Kanawha River, he also wrote a number of articles and contributed to numerous publications with words and/or photographs. Sutphin provided historical presentations on the Delta Queen and other large sternwheel excursion boats and served as a consultant for several documentaries and exhibits. Sutphin …