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Computational Intelligent Impact Force Modeling And Monitoring In Hislo Conditions For Maximizing Surface Mining Efficiency, Safety, And Health, Danish Ali

Doctoral Dissertations

"Shovel-truck systems are the most widely employed excavation and material handling systems for surface mining operations. During this process, a high-impact shovel loading operation (HISLO) produces large forces that cause extreme whole body vibrations (WBV) that can severely affect the safety and health of haul truck operators. Previously developed solutions have failed to produce satisfactory results as the vibrations at the truck operator seat still exceed the “Extremely Uncomfortable Limits”. This study was a novel effort in developing deep learning-based solution to the HISLO problem.

This research study developed a rigorous mathematical model and a 3D virtual simulation model to …

Exposure Assessment Of Emerging Contaminants: Rapid Screening And Modeling Of Plant Uptake, Majid Bagheri

Doctoral Dissertations

"With the advent of new chemicals and their increasing uses in every aspect of our life, considerable number of emerging contaminants are introduced to environment yearly. Emerging contaminants in forms of pharmaceuticals, detergents, biosolids, and reclaimed wastewater can cross plant roots and translocate to various parts of the plants. Long-term human exposure to emerging contaminants through food consumption is assumed to be a pathway of interest. Thus, uptake and translocation of emerging contaminants in plants are important for the assessment of health risks associated with human exposure to emerging contaminants. To have a better understanding over fate of emerging contaminants …

Fabrication, Characterization And Environmental Monitoring Of Polymer-Based Materials For Biomedical And Structural Applications, Mousumi Bose

Doctoral Dissertations

"Polymers are versatile materials utilized for variety of applications. In biomedical field, luminescence quenching based optical oxygen sensors encapsulated in polymeric substances are gaining attention for early detection of surface wounds associated with tissue oxygen. A simple and low-cost fabrication technique was developed to produce sensor arrays for continuous two-dimensional oxygen tension measurement. Sensor patch along with smart phone-based readout technique is being evaluated as a smart bandage.

The environmental concerns and limited petroleum supply demand for replacing petroleum-based polymers with renewable bio-based sources while maintaining comparable properties. A sustainable and green approach was adopted to synthesize soy polyol-derived rigid …

Investigating The Effect Of Operating Condition On Esd-Induced Soft-Failures, Omid Hoseini Izadi

Doctoral Dissertations

"Conflicting observations have been found in the literature regarding the effect of operating conditions on ESD (electrostatic discharge) susceptibility. While some studies have suggested a strong correlation between the two, others observed little to no correlation. In this work, a systematic study has been carried out suggesting the existence of a strong correlation between the ESD susceptibility and operating conditions. It is found that the root cause of this conflict is random ESD noise injection. A measurement approach is proposed to synchronize the noise injection with the system activity such as high/low CPU load. In this approach, the current consumption …

Spatiotemporal Variations Of Upper Crustal Anisotropy Along The San Jacinto Fault Zone In Southern California And The Fairview Region In Central Oklahoma, Enyuan Jiang

Doctoral Dissertations

"To discern spatial and explore the possible existence of temporal variations of upper crustal anisotropy along an ~15 km section of the San Jacinto Fault Zone (SJFZ) in California, and in the Fairview, Oklahoma, region, we conduct systematic shear wave splitting (SWS) investigations using local S-wave data recorded by seismic stations. Strong spatial variations in crustal anisotropy are revealed by 1694 and 405 pairs of splitting parameters (including the fast polarization orientation and the splitting time), respectively. For both areas, for raypaths traveling through the fault zones, the fast orientations are parallel to the faults and may be attributed to …

Convective-Diffusive Transport In Krogh Cylinders: A Model For Pharmacokinetics, Xianjie Qiu

Doctoral Dissertations

"Drug delivery to inside of the tumor is the important problem. The dynamics of drug delivery is presented here. Previously and particularly for directed delivery, a stirred tank model has been used, which appears to have worked well when compared to experiments. However, the stirred tank models do not include all the mass transfer resistances and towards that end we have used a distributed system called Krogh cylinder. This study focuses on the Krogh cylinder model simulation, both on the fluid flow and the mass transfer. The capillary network is broken down into cylindrical cells, each containing a capillary and …

Investigation Of Packed Bed And Moving Bed Reactors With Benchmarking Using Advanced Measurement And Computational Techniques, Binbin Qi

Doctoral Dissertations

"Trickle bed reactors (TBR), as typical packed bed reactors (PBR), are widely used in various fields. Very limited information regarding the flow behaviors, hydrodynamic, and mathematical models in extrudate catalyst shapes, such as cylinders, trilobes, and quadrilobes, can be found in literatures because the major focus was on spherical shape. Therefore, a hybrid pressure drops and liquid holdup phenomenological model for extrudate catalyst shapes was developed based on two-phase volume averaged equations, which showed high accuracy against experimental data. The maldistribution and dynamic liquid holdup were investigated in quadrilobe catalyst using gamma-ray computed tomography. A pseudo-3D empirical model was developed …

Source Reconstruction In Near Field Scanning For Rfi Application, Hosseien Rezaei

Doctoral Dissertations

"This research is divided into three major topics. The first topic, mechanical magnetic field generator for communication in the ULF range, is discussed in the first paper. The second topic, source reconstruction in near field scanning for RFI application, is discussed over the course of two papers. The third topic, analysis of imbalanced 2 or 3 Wire VHF LISN, is discussed in the last two papers.

In the first topic, the possibility to use a mechanical system (a rotating magnet) as a source (generator or antenna combined) of the ULF magnetic field is investigated. Ultralow frequency (ULF) communication systems have …

Thermophysical Properties Of Nominally Phase Pure Boride Ceramics, Austin D. Stanfield

Doctoral Dissertations

"This research focusses on the thermophysical properties of nominally phase pure boride ceramics. As interest in ultra high temperature ceramics increases due to a renewed interest in hypersonic flight vehicles and with the expanding materials design space accompanying interest in high entropy materials, it is imperative to understand the intrinsic properties of boride ceramics. By reducing Hf content in ZrB₂ from the natural abundance, ~1.75 at% in this case, to ~100 ppm, thermal conductivity increased from 88 W/m·K to 141 W/m·K. Removal of Hf allowed the thermal conductivity of ZrB₂ with small transition metal solute additions to be …

The George-Anne Daily, Georgia Southern University

George-Anne Media Group: Newsletters & Magazines

No abstract provided.

Novel Transformer With Variable Leakage And Magnetizing Inductances, Angshuman Sharma, Jonathan W. Kimball

Electrical and Computer Engineering Faculty Research & Creative Works

This paper introduces the concept of a novel variable inductance transformer (VIT) whose leakage and magnetizing inductances can be varied dynamically and independently to aid the advancement of research in isolated power electronic converters. In this transformer, the leakage inductance can be varied by varying the length of overlap between the primary and secondary windings, while the magnetizing inductance can be varied by varying the air gap between the core legs. Individual controls for the two inductances ensure that one can be varied independent of the other, as needed to satisfy different power conversion objectives. In this paper, the analytical …

Georgia Southern Magazine, Georgia Southern University

Georgia Southern Magazine

This issue is labeled 2020, but is for Winter 2021.

• News and Events
• True Blue Spotlight
• Then & Now
• Tracking an Invisible Enemy
• Rising Star
• Best Foot Forward
• Meet Our 40 Under $0
• University News
• Research
• Athletics
• Alumni
• Support
• In Memoriam

Agent-Based Model Of Broadband Adoption In Unserved And Underserved Areas, Ankit Agarwal

Masters Theses

"In the last two decades, demand for broadband internet has far outpaced its availability. The Federal Communications Commission’s (FCC) 2020 Broadband Deployment report suggests that at least 22 million Americans living in rural areas lack access to broadband internet. With the COVID-19 pandemic affecting normal life, there is an overwhelming need to enable unserved and underserved communities to adapt to the “new normal”. To address this challenge, federal and state agencies are funding internet service providers (ISPs) to deploy infrastructure in rural communities. However, policymakers and ISPs need open-source tools to predict take-rates of broadband service and formulate effective strategies …

Investigation Of Post-Acid Stimulation Impacts On Well Performance Using Fracture Modeling And Reservoir Simulation In A Jurassic Carbonate Reservoir, Muaath Alansari

Masters Theses

"Well stimulation (well fracturing) became an essential tool in the Oil and Gas industry to unlock the potential of unconventional reservoirs all over the world and especially in the Middle East. In Kuwait, well stimulation is obligatory when dealing with deep Jurassic carbonate reservoirs. Thus, the well fracture designing process plays a very critical role in determining the success of the stimulation job and the improvement of the recovery.

Several wells stimulated with 20% HCL have shown wide variations in both short and long term well production performance. The research aims to investigate and identify the possible reasons causing these …

Mechanical Activation And Cation Site Disorder Of Spinel-Based Ceramics, Cole A. Corlett

Masters Theses

"This research focuses on the processing and the effects that has on the cation disorder of magnesium-aluminate spinel based (MgAl₂O₄) ceramics. The first goal of this project was to determine the effects of high-energy milling, i.e., mechanical activation, on cation disorder (inversion) within the spinel structure. First, 1:1 molar ratios of MgO:Al₂O₃ ceramics were processed using two green processing methods, ball milling (XD) and SPEX milling (mechanical activation, MA) followed by a subsequent annealing treatment in air to form a single spinel phase in each powder sample. Neutron diffraction analysis was employed to …

Computer Gamification: Addressing Symptoms Of Inattentive Adhd In Children, Shavonne Victoria Halterman

Masters Theses

“Computer gamification has the potential to help meet the educational needs of children with Inattentive Attention Deficit/Hyperactivity disorder (ADHD). The elements of computer gamification are mapped to distinct kinds of interventions for Inattentive ADHD and show certain types of computer gamified learning are better than others for those who experience Inattentive ADHD”--Abstract, page iii.

A Compact Wavelength Meter Using A Multimode Fiber, Ogbole Collins Inalegwu

Masters Theses

“Wavelength meters are very important for precision measurements of both pulses and continuous-wave optical sources. Conventional wavelength meters employ gratings, prisms, interferometers, and other wavelength-sensitive materials in their design. Here, we report a simple and compact wavelength meter based on a section of multimode fiber and a camera. The concept is to correlate the multimodal interference pattern (i.e., speckle pattern) at the end-face of a multimode fiber with the wavelength of the input lightsource. Through a series of experiments, specklegrams from the end face of a multimode fiber as captured by a charge-coupled device (CCD) camera were recorded; the images …

Values Of Trust In Ai In Autonomous Driving Vehicles, Ru Lian

Masters Theses

“Automation with artificial intelligence technology is an emerging field and is widely used in various industries. With the increasing autonomy, learning, and adaptability of intelligent machines such as self-driving cars, it is difficult to regard them as simple tools in human hands. At the same time, a series of problems and challenges such as predictability, interpretability, and causality arise. Trust in self-driving technology will impact the adoption and utilization of autonomous driving technology. A qualitative research methodology, Value-Focused Thinking, is used to identify the values of trust in autonomous driving vehicles and analyze the relationship between these values”--Abstract, page iii.

The Role Of Social Media In Human Trafficking Victimization, Alicia Marie Terwilliger

Theses and Dissertations

Human trafficking is the recruitment, transportation, transfer, harboring, and receipt of people. Humans are one of the only global commodities that can be sold and used repeatedly (Jones et al., 2007), helping to make trafficking a multi-billion-dollar industry worldwide. There are several types of trafficking, including forced labor, debt bondage, organ harvesting, and sexual exploitation. Often, trafficking includes threats, the use of force, coercion, abduction, and fraud for exploitation, labor, harvested organs, or sex. Human trafficking occurs domestically and across international borders, with over 45 million victims globally (Bonilla & Mo, 2019). Every state in the United States is affected …

A Qualitative Examination Of Student Threat Assessment In Nassau County, New York, Christopher J. Cleary

Theses and Dissertations

Law enforcement agencies and school systems face the critically important task of preventing attacks of targeted school violence and providing safe environments for students, faculty, and staff. The tragic results of past school shooting incidents have caused law enforcement agencies to work collaboratively with educators to develop strategies to reduce violent attacks.

Numerous examples from previous school shooting incidents show that shooters exhibited certain warning signs before the attack, and those signs went unaddressed. The student threat assessment process was developed to help educators and law enforcement members recognize the warning signs and take preemptive action before violence occurs. Threat …

Community Attitudes Towards Juvenile Sex Offenders And Registration In Virginia, Paige Reed

Theses and Dissertations

The collateral consequences and harmful effects of juvenile sex offender registration and restrictions has been the forefront of conversation surrounding sex offender legislation in the United States. The literature available has consistently shown that juveniles profoundly differ from adults in significant areas such as decision making, cognitive capability, judgment, and overall development. The literature has also consistently shown that juvenile sex offenders are amenable to treatment, have considerably low recidivism rates, and are unlikely to offend into their adulthood. Despite this, and even though the juvenile justice system prioritizes rehabilitation over punitive measures, juvenile sex offenders are commonly subjected to …

Serving Culturally And Linguistic Students Identified With A Communication Disability In The K-12 Educational Environments, Lashell Dauterman

Theses and Dissertations

As more and more students enter public schools with culturally and linguistically diverse backgrounds that require services under the Individuals with Disabilities Education Act, facilitators must be more sensitive to the needs, especially in the area of communication. Augmentative and alternative communication devices and other assistive technology are required by law to be utilized with individuals identified as disabled. However, due to the challenges that exist in properly identifying and implementing intervention plans for children who require services as English language learners and special education, communication needs are often misidentified or not provided. Another issue that exists is the lack …

A Training Intervention For Middle School Teachers On Culturally Relevant Instruction And Culturally Relevant Classroom Management Strategies, Vivian Yakpo Newton

Theses and Dissertations

This applied dissertation was designed to determine the effectiveness of the Middle School Teacher Training Intervention on the application of culturally relevant instruction and classroom management instructions by teachers in a Title I middle school in the southeastern United States. This school lacked culturally relevant instruction and behavior management, despite its teachers having undergone the training program. It also had significant identifiable gaps in the academic achievement of its students, which raised questions about the efficacy and inclusivity in its educational environment. The lack of cultural competence of middle school teachers and administrators contributes to the suboptimal performance of students …

The Relationship Of Authentic Leadership And Growth, Retention, And Productivity, Michael B. Horwitz

Theses and Dissertations

Leadership has been heralded a critical component for the achievement of successful organizational outcomes. Recent financial, social, psychological, and environmental challenges that are being faced on a global scale have raised the call for new and effective leadership. Researchers and practitioners have expressed the need for the development of good leaders. Authentic leadership (AL) has been described as the root theory of all other forms of positive leadership and offers a way to describe and develop more effective leadership and drive veritable sustained superior performance.

Authentic leaders are proposed to have greater self-awareness and self-regulated positive behaviors, seeking to develop …

Exploring The Aftermath Of Cyber And Traditional Bullying Victimization Of Adolescent’S Mental Health And Academic Success, Latasha L. Young

Theses and Dissertations

The problem addressed in the research study was that cyber bullying and traditional bullying continued to increase at the research site during the past 4 years. The purpose of the study was to determine the influences of mental health services that were designed to decrease the negative effects of both cyber and traditional bullying on adolescent clients’ health and academic performance. This applied dissertation was designed to examine the experiences of cyber and traditional bullying victimization of adolescents’ mental health and academic success, within a large southern state in the United States, to provide practical solutions to address the concerns …

Blended Learning Transitioning To Virtual Learning: Middle School Teacher Perspectives, Jennifer Louise Henry

Theses and Dissertations

This study addressed specific factors that influenced the success of blending learning as it transitioned to virtual learning from the perspectives of middle school teachers. The purpose of the qualitative case study was to determine the challenges of blended and virtual learning from a teacher’s perspective and the positive outcomes of the integration of blended and virtual learning.

The researcher focused on the transition to virtual teaching during the Coronavirus (COVID-19) Pandemic of 2020 and how blended learning impacted this transition to virtual teaching. The study included middle school teachers from various disciplines who taught at the middle school level. …

The Discounted Labor Of Bipoc Students And Faculty, Taleed El-Sabawi, Madison Fields

Faculty Publications

Black Law Students experienced a different COVID-19 pandemic than their majority counterparts due in part to the emotional and physical toll caused by the violent, public mistreatment of Black persons at the hands of law enforcement. While some law faculty at some institutions were proactive in identifying the struggles that their Black students were facing, most law faculty and administrators did nothing—prompting Black students to take time away from their studies to organize, draft letters, gather signatures, and have very uncomfortable conversations with university administrators and faculty about the need for change. Meanwhile, Black faculty and faculty of color, who …

Deconstructing Social Anxiety: Through Gifs And The Inspiration Of Artists' Books, Ashley Hsieh

Scripps Senior Theses

My project deconstructs social anxiety through the form of gifs. This is an important issue to address especially now, as it is one the most current stressors for my peers and myself upon returning to school after over a year in quarantine. Although not everyone has had the same experience, there is a large concern for students’ mental health and well-being post-pandemic. Learning how to re-navigate socializing after a year in isolation has been exhausting, physically and mentally, adjusting to places and new faces on campus. My work is composed of a series of three digital gifs that depict different …

Identifying Novel Isotopic Tracers Of Marine Primary Producers To Study Food Web Carbon Cycles, Angela Stahl

Open Access Master's Theses

Eukaryotic microalgae play critical roles in global biogeochemical cycling, the efficacy of the biological pump, and the structure and function of most marine food webs. Compound-specific isotope analysis of amino acids (CSIA-AA) couples molecular-level biomarkers with stable isotope analyses to track the contribution of primary producers to food webs. Previous work has developed δ13CAA fingerprints for major groups of primary producers but categorized all marine algae together despite their vast taxonomic and ecological diversity. This work characterizes the δ13CAA fingerprints of four major groups of eukaryotic microalgae — diatoms, dinoflagellates, raphidophytes, and prasinophytes — in controlled cultures, and quantifies the …

Marine Debris Removal: A Case Study On South Korean Marine Litter Management, Eliya M. Baron Lopez

Open Access Master's Theses

Marine plastic pollution is an ongoing global problem, with adverse consequences on human health and marine ecosystems, and requires diverse solutions to eliminate leakages into the oceans via rivers, waste outflows, and direct dumping from vessels. Developed coastal states, like South Korea, have been quietly investing in marine litter management strategies that focus on coastal areas. South Korea is required by national law to establish marine debris management plans that implement policies to address the prevention, collection, and promotion of marine litter. One of these strategies include the implementation of floating debris containment booms (FDCB) in South Korean coastal and …