Digital Commons Network^™

Investigation Of Mechanically Fatigue Low-Frequency Energy Harvesting Effects On Isotropic Materials, Daniel J. Meade

College of Graduate Studies: Theses & Dissertations

This research project reports an exploratory investigation of energy harvesting effect on isotropic material that goes through low frequency mechanical fatigue. Energy harvesting is a growing field of study that can recycle ambient energy back into a system that would otherwise be lost. This is a significantly useful method for the ongoing energy crisis and provides an alternate route to design and upgrade systems to be more efficient and last longer than current system designs. However, it is time to investigate if there is any effect vibration-based energy harvesting has on the structure from which energy is being harvested. To …

Understanding The Role Of Recalcitrant Organic Phosphorus Mineralization On Harmful Algal Blooms At The Sediment-Water Interface Of Freshwater System, Tasnuva Farnaz

College of Graduate Studies: Theses & Dissertations

Over the past few decades, an enormous number of resources have been allocated to reduce the amount of phosphorus (P) entering the environment from both point and non-point sources. Nevertheless, the decrease in external P loading has not always resulted in a simultaneous decrease in the occurrence of harmful algal blooms (HABs) in waters contaminated with phosphorus. A two-part study is currently being conducted to investigate and measure the role of legacy recalcitrant P forms in the overall pool of soluble reactive phosphorus (SRP). However, the objective of this particular study is to evaluate the potential of Organic Phosphorus (PO) …

Computational Analysis Of A Naca 0012 Straight Wing At Various Reynolds Numbers Approaching Stall, John E. Crowe Iii

College of Graduate Studies: Theses & Dissertations

As the capabilities and power of computational resources improve with each passing year, the implementation of simulation in the field of aerospace engineering also increases due to its increased efficiency, as it allows for reducing both time and resources. In this study, a computational method is created and tested for determining and visualizing the effect of increasing flow velocity on a NACA 0012 3D wing as it approaches and reaches stall. For this study, the flow over a NACA 0012 3D wing is simulated using a Reynolds-averaged Navier Stokes simulation at angles of attack of 6, 8, 10, 12, and …

Resonant Ultrasound Spectroscopy(Rus) For Material Characterization Of Metal Am Parts, Malik Marks

College of Graduate Studies: Theses & Dissertations

Additive manufacturing (AM) has revolutionized the manufacturing industry by offering flexibility, customization, and rapid prototyping capabilities. However, ensuring the quality and reliability of AM parts remains a significant challenge due to variations in material properties and process parameters. The NDE method used in this study is Resonant Ultrasound Spectroscopy (RUS). This method was used to evaluate and understand its ability to detect internal voids and defects. Dog-bone samples were made using the 316L stainless steel alloy which were fabricated by powder bed fusion (PBF) AM technique at different processing conditions and post processing conditions. These samples were tested to find …

Understanding The Impact Of Process Interruption On Mechanical Properties In Metal Additive Manufacturing: A Comprehensive Investigation, Poojith C. Chigurupati

College of Graduate Studies: Theses & Dissertations

Metal additive manufacturing techniques enable rapid prototyping and on-demand manufacturing while improving supply chain resiliency. Changes in microstructure and micro-mechanical characteristics of 3D printed metal parts occur due to the influence of process interruptions on melting-solidification cycles during the layer evolution in additive manufacturing processes. The process interruption can deteriorate the structural integrity of the 3D printed parts and generate micro-flaws in the interruption region. Manufacturing post-processing techniques such as Heat-Treatment methods can enhance the mechanical properties of the parts. Since variations commonly happen at the layer level, the investigation of mechanical properties must be done such that these variations …

Development And Characterization Of Vegetable Oil Based, Acrylated Resins For Stereolithography 3d Printing, Julius A. Adeyera

College of Graduate Studies: Theses & Dissertations

The increase in the demand for additively manufactured parts and the drive towards a sustainable economy with less environmental pollution has necessitated the need for renewable materials for use in 3D printing. This study shows the development and characterization of vegetable oil based, acrylated resins for 3D printing. Bio-based 3D resins were formulated using bio-based oils with a minimum of 70% bio-based content and were ready to be polymerized using the stereolithography (SLA) 3D printing process. Two distinct vegetable oils were used to develop biobased photopolymers. Biobased acrylated epoxidized photopolymers were successfully developed that have good mechanical and chemical properties. …

Natural Convection Heat Transfer Characteristics Of Sierpinski Carpet Fractal Fins In Horizontal And Vertical Orientations, Ayomide Ayoola

College of Graduate Studies: Theses & Dissertations

This study investigates the thermal performance of fins with perforations inspired by the Sierpinski carpet fractal pattern under natural convection conditions in both vertical and horizontal orientations. The objective is to analyze the effects of fractal iteration levels on three primary performance metrics: efficiency, effectiveness, and effectiveness per unit mass. Experimental evaluations were conducted for fractal fins from iterations 0 through 4, utilizing aluminum material, with each fin heated to controlled conditions. The results reveal that efficiency generally decreases with higher fractal iterations, reflecting increased thermal resistance associated with greater porosity and complex geometry. However, effectiveness per unit mass improves …

Implementation Of Cavity Vortex Generators To Mitigate Stall And Ice Accretion On The Naca 0012, Eric Pernell

College of Graduate Studies: Theses & Dissertations

With the growing environmental concerns of international aviation carbon emissions are driven by the ever-increasing commercial aviation traffic. This study aims to increase the aerodynamic efficiency of the NACA 0012, by implementing cavity vortex generators with the intent to increase the effective stall angle without a substantial increase of drag. This study is performed with Reynolds Averaged Navier-Stokes (RANS) at a low Reynolds of 5.0E+04 with varying cavity depths along the leading edge. The depths study is placed at 10 percent cord at depths of 3, 5, and 10 percent cord. All cavity vortex generators effectively increased the stall angle …

Aeroelastic Phenomena Of Fixed-Wing Aircraft In Transonic And Supersonic Flows Using A Tightly-Coupled Computational Approach, John C. Havenar

College of Graduate Studies: Theses & Dissertations

Aeroelastic phenomena encountered during flight have considerable effects on the aerodynamic characteristics of fixed-wing aircraft. Transonic aeroelastic phenomena are often characterized by unique flow features which have complex ramifications for aircraft in transonic flight. Computational study of high-speed aeroelastic phenomena requires a fully-coupled aeroelastic algorithm. A series of wing designs are studied with a computational finite volume method solver accompanied by a finite element method solver for the calculation of structural deformation. The computational model for the flow field is validated with experimental data. Modeled flight conditions include transonic flows with bordering subsonic and supersonic cases included for completeness. The …

Detecting Bearing Race Defects With Inductive Magnetic Reluctance Sensors And Artificial Neural Networks, Collin Daly

College of Graduate Studies: Theses & Dissertations

This work proposes a method of detecting physical damage to bearing races in a rotational assembly by means of magnetic reluctance sensors generating a signal from a rotating gear-tooth wheel. A nominally sinusoidal signal is generated based on the rotation of a gearwheel with regularly spaced voids and lands. Detection is based on the time variance of the signal periodically in relation to the gearwheel and the bearing damage. The purpose of this work is to propose a process to detect and classify bearing race defects using existing sensors and neural networks for hazardous area equipment applications.

Signature Moves? An Environmental Scan Of The Intersection Between Educational Development And Sotl, Laura Cruz, Hillary H. Steiner, Clare Cruz

International Journal for the Scholarship of Teaching & Learning

Although the scholarship of teaching and learning (SoTL) has been described as the signature pedagogy of educational development (a professional field focused on support for teaching and learning in higher education), there is little systematic evidence of the scale and scope of the SoTL support practices that centers for teaching and learning (CTLs) are currently using, how they are using them, and how these practices connect across the ecosystem of higher education. To understand the evolving intersection between educational development and SoTL, we used web scraping/content analysis to explore the current state of SoTL support at U.S.-based CTLs (as reflected …

2024 Spring Commencement, Georgia Southern University

Commencement Programs

No abstract provided.

2024 Fall Commencement, Georgia Southern University

Commencement Programs

No abstract provided.

Eagle Accountant - 2024, Georgia Southern University

Eagle Accountant

• Accounting Advisory Council
• Accreditation & Rankings
• Cover Story - The Titan 
• Student Spotlight:  Across the Atlantic to Georgia Southern
• Student Spotlight: Solving the Puzzle: My Journey at Georgia Southern
• Fraud & Forensic Accounting 
• A Standout Life: Julian Deal 
• Faculty Highlights 
• Faculty Service Spotlight 
• Faculty Research Spotlight 
• Student Ordanizations & Activities 
• New MAcc Program Option 
• Faculty Awards, Service, & Publications  
• Alumni Notes & Obituaries 

Faculty Handbook, Georgia Southern University

Faculty Handbooks

No abstract provided.

2024 Georgia Southern University Men's Soccer Roster, Georgia Southern University

Men's Soccer Records

No abstract provided.

2024 Georgia Southern University Women's Soccer Media Guide, Georgia Southern University

Women's Soccer Records

No abstract provided.

2023-2024 Georgia Southern University Women's Swimming And Diving Roster, Georgia Southern University

Women's Swimming Records

No abstract provided.

2023-2024 Georgia Southern University Men's Tennis Roster, Georgia Southern University

Men's Tennis Records

No abstract provided.

From Lived Experiences To Social Activism: Latino Fraternity Brothers Critical Service To The Latinx Community, Regina L. Suriel, James Martinez, Christian Bello Escobar, Jamie L. Workman

Journal of Higher Education & Student Affairs

Colleges and universities are seeing growth of Latinx students actively engaged in Greek life. In this study, six Latino participants share their testimonios as members of different Chapters of a Latinx Greek Letter Organization (LGLO) nestled within Predominantly White Institutions located in the state of Georgia, USA. Informed by LatCrit theory, this qualitative study uses member’s testimonios to shed light on their varied and sometimes politically charged and racist lived experiences. The researchers draw on these experiences to show how the LGLO supported these members’ character and leadership development and their desire and commitment to critical service and socially just …

Georgia Southern Libraries Annual Report 2023 - 2024, Georgia Southern University Libraries

Library Annual Reports

No abstract provided.

Nurturing Teamwork, Intercultural Competence, And Belonging In First-Year Stem Students, Aparajita Jaiswal, Muna Sapkota, Myanna Marie Ramos, Laura Starr, Aletha Stahl

International Journal for the Scholarship of Teaching & Learning

Developing a professional STEM workforce with a high degree of intercultural competence is essential in today’s globalized world. To this end, Higher Education Institutions incorporate reflection to help students make meaning of their learning experiences. In this study, we investigated the development of intercultural and teamwork skills among undergraduate first-year STEM students enrolled in a global living- learning community. The goal of the community was to help students develop intercultural competence and teamwork skills by engaging them in active learning environments and reflection. The study used an inductive thematic approach to characterize the impact of the learning community on intercultural …

From Expectations To Experiences: Students’ Perceptions Of Specifications Grading In Higher Education, Adriana Streifer, Michael Palmer, Jessica Taggart

International Journal for the Scholarship of Teaching & Learning

Specifications grading is a form of alternative grading that emphasizes transparency, low stakes, student learning, and equity. It has attracted practitioners for its potential to enhance student motivation, and to remedy several challenges of traditional grading. Specifications grading has become increasingly popular, yet little is known about students' perceptions of and experiences with it. We examined students’ predicted and actual experiences of specifications grading in courses across several disciplines at a research-intensive, public university in the United States. Particular attention was paid to how students perceive specifications grading to influence their motivations to learn. Most students expressed positive attitudes toward …

From Crisis To Resilience: Pandemic Perspectives On College Student Experiences, Motivation And Self-Regulated Learning, Diana Botnaru, Anna C. Brady, Dragos Amarie, April Garrity, Erica Hillsnipe, Caroline Hopkinson, Cynthia Lynes, Eryn Michelle Maher

International Journal for the Scholarship of Teaching & Learning

The short-term effects during the transition to emergency remote teaching at the onset of the COVID-19 pandemic on college students are well-studied. The present study investigated the ongoing impact of the COVID-19 pandemic on students enrolled in undergraduate classes (e.g., pandemic experiences and their impact on basic psychological needs, metacognitive learning strategies, and motivation regulation). The survey was administered at a 4-year university in the Southeastern United States during fall 2022. The majority of participants (N = 590) were women (82%), white (56.6%), not Hispanic or Latinx (93.4%), and health profession majors (58.1%). Results indicated that mental health, academic, and …

Portraits Of A Rural Georgia High School Stem Program, Jonathan L. Garner, Gwen Scott Ruttencutter, Forrest R. Parker Iii

Georgia Educational Researcher

This research examined school personnel’s strategies and practices responsible for increasing student science proficiency at a certified rural high school STEM program. In the United States, difficulties have developed in adequately preparing students for careers in STEM sectors, especially in secondary education. This trend has led to increased difficulties for high school graduates competing globally for high-paying jobs. Rural schools have been especially susceptible to inadequately preparing their students academically. I used qualitative research portraiture to generate a mental image of the STEM program at the selected high school. I interviewed three teachers and two administrators in a certified rural …

2024 Georgia Southern University Football Roster, Georgia Southern University

Men's Football Records

No abstract provided.

Graduate Catalog, Georgia Southern University

Graduate Catalogs

No abstract provided.

Lean In Louder, Peter Ferguson

National Youth Advocacy & Resilience Journal

Lean In Louder aims to do more than showcase; it seeks to empower, educate, and act as a catalyst for scholars, adults, communities, and co-conspirators to enhance and elevate youth voices. The following pages will include foundational and tangible ways to exemplify equity and elevate scholars' voices. This will consist of links to selected resources and exercises/activities to support best-practice youth development engagement around scholars' voices. You can scan the QR Code for regularly updated activities, practices, supports, examples, journal addendums, and scholar and practitioner resources to develop the mindset and practice of "leaning in louder" to elevate scholars' voices.

Psychotherapist Awareness And Competence Managing Social Media Concerns, Jing Wen Ong

College of Graduate Studies: Theses & Dissertations

Social media use increased substantially in recent years, spurring the growth of research focused on its association with mental health. Previous research examined the relationship between positive and negative aspects of mental health and social media use. Other studies explored the relevance of social media to professional practice of psychologists including the use of social media to reach populations with limited access to mental health services and ethical dilemmas arising from social media use; however, there is limited understanding of the pertinence of social media to concerns that clients discuss in therapy and therapist competence in handling these discussions. The …

Enhancing Flight Delay Predictions Using Network Centrality Measures, Joseph Ajayi

College of Graduate Studies: Theses & Dissertations

Accurate prediction of flight delays remains a formidable challenge within the aviation industry, owing to its inherent complexity and the interconnectivity of its operations. Traditional flight prediction methods frequently utilize meteorological conditions—such as temperature, humidity, and dew point—alongside flight-specific data like departure and arrival times. However, these predictors often fall short of capturing the nuanced dynamics that lead to delays. This thesis introduces network centrality measures as novel predictors for enhancing the binary classification of flight arrival delays. Furthermore, it emphasizes the application of tree-based ensemble models, which are recognized for their superior ability to model complex relationships compared to …