Digital Commons Network^™

Optimization Of Grading Ring Design For Metal Oxide Arrester Using Gravitational Search Algorithm, Hazlee Azil Illias, Chea Zern Hong, Kalaiselvi Aramugam, Hazlie Mokhlis, Azrul Mohd Ariffin, Mohd Fairouz Mohd Yousof

Research Publications (2021 to 2025)

A high voltage metal oxide arrester (MOA) is used to protect power system against overvoltages. The electric field surrounding the MOA can be made uniform by installing a grading ring. It is important to have a proper way to design a grading ring with low electric field of the design. In this project, a model of 150 kV MOA was developed in COMSOL Multiphysics software. The grading ring dimensions were varied to study their effects on the electric field surrounding MOA. It was found that the grading ring dimensions strongly influence the electric field magnitude surrounding the arrester. Gravitational search …

Recent Advancements To Mitigate Zinc Oxide Formation In Zinc-Air Batteries: A Technical Review, Hamed Pourzolfaghar, Soraya Hosseini, Fathiah Mohamed Zuki, Marziyeh Alinejad, Yuan-Yao Li

Research Publications (2021 to 2025)

Application of zinc metal in the field of electrochemistry has always been of specific interest as it is a favored material for high energy density batteries and sacrificial electrodes to guard the other metallic components against corrosion. Some other factors, beside a high energy density, such as its low cost, ease of handling, nontoxicity, and abundance of zinc, has made this metal receive a considerable attention by researchers. In the past decades, considerable efforts have been dedicated to discovering and emerging electrically rechargeable zinc-based batteries in a response to the growing request in energy consumption in the fast-growing market of …

Enhancing The Seed Germination Process Of Montezuma Cypress (Taxodium Mucronatum Ten.), Alejandro Fierro-Cabo, August Plamann

School of Earth, Environmental, & Marine Sciences Faculty Publications

Montezuma cypress (Taxodium. mucronatum) is an ecological, cultural and economically valuable riparian tree species. Two experiments evaluating the effectiveness of various seed treatments were conducted to identify germination best practices and to evaluate the dynamics of the germination process. Seeds were collected on two occasions, one year apart, from the only remaining natural T. mucronatum tree stand in the United States. The seeds were subjected to various soaking and stratification conditions. Across all treatments, germinability ranged between approximately 30%-40%, with slightly higher values occurring among the second seed cohort. Overall, no significant differences in germinability were detected in either …

New Amphibian And Reptile Distribution Records From Eastern South Dakota, Usa, Drew R. Davis

School of Earth, Environmental, & Marine Sciences Faculty Publications

Over recent years, the continued collection of voucher specimens has helped to better document the distributions of South Dakota’s amphibians and reptiles. Despite large increases in our knowledge of these distributions, it remains clear that gaps in our understanding remain. Here, I report 17 new county records of six species of amphibians and reptiles from eastern South Dakota (east of the Missouri River) that are the result of fieldwork conducted in September 2020. The majority of these records are from the northern portions of the James River Lowland, Missouri Coteau, and Drift Plains ecoregions (Bryce et al. 1998), which are …

Importance Of Low-Relief Nursery Habitat For Reef Fishes, Michael A. Dance, Ray R. Rooker, Richard Kline, Antonietta Quigg, Gregory R. Stunz, R. J. David Wells, Kirsten Lara, Jessica Lee, Bobbie Suarez

School of Earth, Environmental, & Marine Sciences Faculty Publications

Coastal restoration projects to mitigate environmental impacts have increased global demand for sand resources. Unfortunately, these resources are often extracted from sand/shell banks on the inner continental shelf, resulting in significant alteration or loss of low-relief reefs in coastal oceans. Experimental reefs (oyster shell, limestone rubble, composite) were deployed in the western Gulf of Mexico to assess their potential value as nurseries for newly settled reef fishes. Occurrence, abundance, and species richness of juvenile fishes were significantly higher on all three types of low-relief reefs compared with unconsolidated sediment. Moreover, reefs served as nursery habitat for a range of reef …

Christianity And Antitrust, Kenneth G. Elzinga, Daniel Crane

Book Chapters

The purpose of this chapter is to consider whether the Christian faith has a nexus with the institution of antitrust. It turns out it doesn’t – and it does. For example, Christianity cannot explain why the Herfindahl–Hirschman Index is superior to the four-firm concentration ratio as a measure of industry concentration. Economics can. On the other hand, economics cannot explain why the per se rule against price-fixing is morally appropriate. The Bible can.

Looking For Hope: The Experience Of Early Career Teachers Engaged In A Collaborative Community Of Reflective Practice As A Model Of Induction And Professional Development, Donia E. Spott

Theses and Dissertations

Teaching has always been an isolated profession and many professional development programs are seen as disconnected from the realities and daily needs of teaching. With the pressures of standards, paperwork, classroom management, and learning to teach, early career teachers can be especially vulnerable to becoming discouraged, disillusioned, and demoralized. This study used a qualitative, narrative inquiry approach to tell the stories of seven early career teachers’ experiences with induction and the development of a reflective community to support early career teachers in their professional practice. As part of the action research approach taken in designing the program, the discussions and …

Strategies For Resolution Enhancement In Liquid Chromatography, Shelby Lynn Weatherbee

Theses and Dissertations

Recent research in liquid chromatography (LC) has led to the development of new methodologies to further improve sample analysis. Non-uniform stationary phases are one such area that focuses on developments in selectivity and efficiency of stationary phases. Within this subset of stationary phases are two major focuses: two-dimensional liquid chromatography (2D-LC) and continuous stationary phase gradients that are the basis of this work.

In this work, LC simulation software was adapted to simulate chromatograms based on experimental and modeled injection profiles. This was done by measuring the injection profiles from a 2D-LC active solvent modulation valve using a variety of …

Continual Learning For Multi-Label Drifting Data Streams Using Homogeneous Ensemble Of Self-Adjusting Nearest Neighbors, Gavin Alberghini

Theses and Dissertations

Multi-label data streams are sequences of multi-label instances arriving over time to a multi-label classifier. The properties of the data stream may continuously change due to concept drift. Therefore, algorithms must adapt constantly to the new data distributions. In this paper we propose a novel ensemble method for multi-label drifting streams named Homogeneous Ensemble of Self-Adjusting Nearest Neighbors (HESAkNN). It leverages a self-adjusting kNN as a base classifier with the advantages of ensembles to adapt to concept drift in the multi-label environment. To promote diverse knowledge within the ensemble, each base classifier is given a unique subset of features and …

Reproducibility And Accuracy Of The Virtual Occlusal Record, Anne M. Harper

Theses and Dissertations

Purpose: To evaluate the reproducibility and accuracy of the virtual occlusal record compared to the gold standard physical bite record

Methods: Two physical bite records of PVS and two virtual bites using an iTero Element scanner were obtained from 22 participants. Intraoral scans were exported as STL files, and virtual occlusal records were created. CBCT images were taken of physical occlusal records and converted to STL files. STL files were superimposed using Geomagic Control X™ Software. Root mean square (RMS) and percent similarity within 0.25 mm tolerance were compared at a significance level of 0.05.

Results: Average …

Nanopore Detection Of Long Time-Scale Single Metallic Cluster Conformational Changes And Surface Ligand Exchange, Bobby D. Cox

Theses and Dissertations

Single molecule nanopore spectroscopy serves as an emerging tool for studying small molecules in aqueous environments without the need for additional chemical labels. Recently it has been seeing increased use as a tool for investigating small metallic nanoparticles and clusters. These clusters consist of a handful of metallic atoms (e.g. Au18) and are regularly ‘passivated’ with organic ligands to provide functionality and protect against aggregation. There has been a widening gap in research studying the surface kinetics of these passivating ligands at the single molecule level as well as during the exchange process. In this work we investigated these surface …

Methods For Developing A Machine Learning Framework For Precise 3d Domain Boundary Prediction At Base-Level Resolution, Spiro C. Stilianoudakis

Theses and Dissertations

High-throughput chromosome conformation capture technology (Hi-C) has revealed extensive DNA looping and folding into discrete 3D domains. These include Topologically Associating Domains (TADs) and chromatin loops, the 3D domains critical for cellular processes like gene regulation and cell differentiation. The relatively low resolution of Hi-C data (regions of several kilobases in size) prevents precise mapping of domain boundaries by conventional TAD/loop-callers. However, high resolution genomic annotations associated with boundaries, such as CTCF and members of cohesin complex, suggest a computational approach for precise location of domain boundaries.

We developed preciseTAD, an optimized machine learning framework that leverages a random …

Single-Molecule Investigation Of I-Motif Folding And Dynamics In Bioinspired Dna Platforms, Anoja Megalathan

Theses and Dissertations

Although the canonical right-handed B-DNA is the predominant form of DNA in cells, DNA can adopt other secondary structures such as hairpins, G-quadruplexes (G4), and intercalated motifs (i-motif). These secondary structures are typically formed in the regions with repeat sequences. Among many secondary structures DNA can adopt, G-quadruplexes and i-motifs (tetraplex structures formed in the G-rich and C-rich sequences, respectively) caught significant research interest in recent years due to the prevalence of G-rich and C-rich sequences in the human genome. While G-quadruplexes are extensively studied, little is known about i-motifs – especially their formation and stability under cellular environments. For …

Multiplexed Nucleic Acid Sensing With Single Molecule Fret, Anisa Kaur

Theses and Dissertations

In recent years, biomarkers have drawn tremendous interest in the fields of clinical diagnostics and biotechnology. In fact, recent quests for biomarker analyses have discovered a myriad of disease-related biomarkers spanning a wide variety of biomolecules such as proteins, nucleic acids, and small molecule ligands. While the detection of only one target at a time is the most common practice in biosensing today, it has been shown that the accuracy of diagnosis increases significantly by measuring the level of multiple biomarkers instead of just one due to the possible overlap of certain biomarkers in more than one disease. However, currently …

Grief, Loss, And Climate Change: Validation Of A Solastalgia Scale, Claire Luce

Theses and Dissertations

Climate change has been identified as a defining issue of this century (United Nations, n.d.). Climate change impacts human wellbeing including mental health. While much research has focused on the way that the effects of climate change cause increases in common mental disorders, mental health is not just the absence of these disorders (World Health Organization, 2014). Non-pathologized mental health responses to climate change, such as the grief and loss that results from climate change impacts, are a growing consideration for researchers. Solastalgia, or the distress experienced in the absence of the solace once provided by the environment in the …

Tya And Educational Outreach In Higher Education: An Asset To Undergraduates And Their Community, Emily J. Mattison

Theses and Dissertations

Undergraduate students pursuing a career in theatre are at the beginning of their life-long training and understanding and appreciation for the art. Performing in a Theatre for Young Audiences (TYA) touring production alongside the responsibility of crafting educational outreach opportunities provides the students with a unique chance to comprehend the art they have chosen to devote their lives to. This paper details the value of offering a course I crafted entitled “TYA Educational Outreach”, for both the undergraduates enrolled and the community they would be reaching. While undergraduates develop an understanding of the impact theatre can have on an individual …

Modeling Vegetation Effects On Barrier Island Evolution, Eric W. Schoen

Theses and Dissertations

Barrier islands play a significant role in protecting coastlines and harboring coastal habitats. In an effort to study and better understand the evolution of barrier island systems, a cellular model capturing various meteorological and environmental processes is proposed. Erosion due to wind, gravity, and marine processes are coupled with plant population effects. We demonstrate the inhibition of plant cover on sediment mobility, island migration, and erosion in the presence of sea level rise.

Cloaca Palace, Connor Marie Stankard

Theses and Dissertations

In this thesis, I trace the compulsive fear of holes, known as trypophobia, from an uncontrollable obsession to a pleasurable preoccupation. The body’s physical porousness makes us receptive to our surroundings, allowing external matter in and destabilizing the boundaries of self and other. Matter invades us, encoding itself into our DNA and transforming humans into chimeric creatures.

Through paintings and multi-media installations, I encourage viewers to reflect on their own bodies as a series of holes, vulnerable receptors to the world. I use the figure of a woman to personify a human hole which has been infected by the outside, …

Governance ≠ Leadership: What Blockchain And Ai Won't Do For Corporate Lawyers, Jeffrey M. Lipshaw

Suffolk University Law School Faculty Works

This is a contribution to the Journal of Corporation Law’s 2020 symposium on blockchain technology and corporate governance. The thesis is that blockchain technology is well suited to the monitoring function in corporate governance; that monitoring as the primary function of corporate governance is a particularly legal conception; and that the business conception of governance has far more to do with leadership, strategy, and operations. If the legal and business conceptions of governance tend to be ships passing in the night (at least in this somewhat exaggerated rendering), it is because prevailing economic and legal theoretical models have a difficult …

Grappling With Covid-19 By Imposing And Lifting Nonpharmaceutical Interventions In Sri Lanka: A Modeling Perspective, Mahesh Jayaweera, Chamath Dannongoda, Dilum Dilshan, Janith Dissanayake, Hasini Perera, Jagath Manatunge, Buddhika Gunawardana

Physics & Astronomy Faculty Publications

The imposition and lifting of non-pharmaceutical interventions (NPIs) to avert the COVID19 pandemic have gained popularity worldwide and will continue to be enforced until herd immunity is achieved. We developed a linear regression model to ascertain the nexus between the time-varying reproduction number averaged over a time window of six days (Rts) and seven NPIs: contact tracing, quarantine efforts, social distancing and health checks, hand hygiene, wearing of facemasks, lockdown and isolation, and health-related supports. Our analysis suggests that the second wave that emerged in Sri Lanka in early October 2020 continued despite numerous NPIs. The model indicates that the …

Prediction Of Equivalent Liquid Permeability From Gas Permeability Measurements: A Recurrent Neural Network Approach, Husam Alkinani, Abo Taleb Al-Hameedi, Shari Dunn-Norman

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

One of the most vital reservoir properties is permeability. It is usually measured using core samples with two major measurement methods: using gas or using liquid. The purpose of this work is to use a data-driven recurrent neural network model to estimate the equivalent liquid permeability based on gas permeability. By using this model, the equivalent liquid permeability can be predicted for the permeability of core samples with rich clay minerals measured using gas (or any core sample that is measured using gas). This will give an alternative way to the currently used method (Klinkenberg method). Core sample data measurements …

Will Carbon Dioxide Injection In Shale Reservoirs Produce From The Shale Matrix, Natural Fractures, Or Hydraulic Fractures?, Sherif Fakher, Youssef Elgahawy, Hesham Abdelaal, Abdulmohsin Imqam

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Enhanced oil recovery (EOR) in shale reservoirs has been recently shown to increase oil recovery significantly from this unconventional oil and gas source. One of the most studied EOR methods in shale reservoirs is gas injection, with a focus on carbon Dioxide (CO₂) mainly due to the ability to both enhance oil recovery and store the CO₂ in the formation. Even though several shale plays have reported an increase in oil recovery using CO₂ injection, in some cases this method failed severely. This research attempts to investigate the ability of the CO₂ to mobilize crude …

It Is Not Just About Birds: What Do Acoustic Indices Reveal About A Costa Rican Tropical Rainforest?, Mónica Retamosa Izaguirre, Jimy Barrantes-Madrigal, David Segura Sequeira, Manuel Spínola-Parallada, Oscar Ramírez-Alán

Neotropical Biodiversity

Acoustic monitoring is used to assess biodiversity across large spatial and temporal scales. However, extracting meaningful information from large data sets might be exceedingly time consuming. For this reason, acoustic indices have been proposed as proxies for biodiversity monitoring. Although acoustic indices hold great promise for standardizing acoustic data analysis, the complexity of acoustic conditions requires careful examination of the relationship between an index and the underlying process of interest. We evaluated 11 acoustic indices at two operational levels: (1) acoustic community level (an aggregation of species that produces sound), using birds as an example to assess how well acoustic …

Taxonomic Diversity And Ecological Attributes Of Copepods Of The Colombian Caribbean Sea, Edgar Fernando Dorado-Roncancio, Johanna Medellín-Mora, José Ernesto Mancera-Pineda

Neotropical Biodiversity

Seven oceanographic expeditions were carried out between 2013 and 2018 to explore the taxonomic diversity and ecological attributes of copepods of the Caribbean Oceanic Ecoregion (CAO). One hundred and forty zooplankton samples were collected in four depth ranges, between 0 and 1000 m depth. A total of 133 species were identified, 33 of which are new records for the Colombian Caribbean Sea and 50 species have amplified their geographical distribution. This information increasing the list of species of marine copepods recorded for the Colombian Caribbean Sea from 214 to 247 species. Carnivorous species (32.33%) and herbivorous-omnivorous species (27.06%) were the …

An Examination Of The Integration Of Augmented Reality In Science Curriculum, Cathleen A. Bierman

Masters Theses

This study examines students’ success rate and level of engagement in a science classroom by using augmented reality (AR) specifically merge cube. Students’ success rate is measured by their grades, which can determine if the student understands the material. Engagement is measured by observing whether or not the students are asking questions, volunteering information, working well with others, paying attention in class, and participates actively in discussions. The two research questions guided the study:1. Does the use of a merge cube in the science classroom improve participants’ success rate in learning science? and 2. Does using a merge cube increase …

5g Security Challenges And Solutions: A Review By Osi Layers, S. Sullivan, Alessandro Brighente, Sathish Kumar

Electrical and Computer Engineering Faculty Publications

The Fifth Generation of Communication Networks (5G) envisions a broader range of servicescompared to previous generations, supporting an increased number of use cases and applications. Thebroader application domain leads to increase in consumer use and, in turn, increased hacker activity. Dueto this chain of events, strong and efficient security measures are required to create a secure and trustedenvironment for users. In this paper, we provide an objective overview of5G security issues and theexisting and newly proposed technologies designed to secure the5G environment. We categorize securitytechnologies usingOpen Systems Interconnection (OSI)layers and, for each layer, we discuss vulnerabilities,threats, security solutions, challenges, gaps …

Distributing Attorney Fees In Multidistrict Litigation, Edward K. Cheng, Paul H. Edelman, Brian T. Fitzpatrick

Vanderbilt Law School Faculty Publications

As consolidated multidistrict litigation has come to dominate the federal civil docket, the problem of how to divide attorney fees among participating firms has become the source of frequent and protracted litigation. For example, in the National Football League (NFL) Concussion Litigation, the judge awarded the plaintiff attorneys over $100 million in fees, but the division of those fees among the twenty-six firms involved sparked two additional years of litigation. We explore solutions to this fee division problem, drawing insights from the economics, game theory, and industrial organization literatures. Ultimately, we propose a novel division method based on peer reports. …

Antitrust's High-Tech Exceptionalism, Rebecca H. Allensworth

Vanderbilt Law School Faculty Publications

American competition policy has four big problems: Amazon, Apple, Facebook, and Google. These companies each reign over a sector of the digital marketplace, controlling both the consumer experience and the possibility of competitive entry. This Essay argues that the conventional account of how antitrust law allowed this consolidation of market power - that it failed to evolve to address the market realities of the technology sector-is incomplete. Not only did courts fail to adapt antitrust law from its smoke-stack roots, but they gave big tech special dispensation under traditional antitrust doctrine. Swayed by prevailing utopic views about digital markets in …

Personalized Learning: Tools For A Covid World, Karen Clancy, Whitney Powell

Pedagogicon Conference Proceedings

Advancing technology allows us to personalize everyday life, from shopping and business transactions to information-seeking, healthcare, and education. Contemporary college students often seek personalized learning experiences that yield high-impact outcomes. Such experiences require successful partnerships between faculty and students. Case studies demonstrating how faculty/student partnerships helped students accomplish personalized learning outcomes are presented. The focus on personalized learning is even more pertinent in the midst of the COVID-19 global pandemic. The increased reliance on virtual learning and independent study may encourage and challenge educators to implement personalized learning methods to maximize learning outcomes and elevate student engagement.

Lessons Learned In Designing Active Learning Modules For The Stem Classroom, Anna M. Christianson

Pedagogicon Conference Proceedings

For students to become real partners in their education, they must shift from a model of passive absorption of knowledge to one of active participation in constructing knowledge. To encourage this shift, I have designed a variety of active learning modules for my introductory chemistry classes, from short participation polls to full-length case studies. When well-implemented, in-class activities can be a valuable experience for students to practice applying their knowledge with instructor guidance. In this report, I will share both successes and challenges encountered in designing student-friendly active learning modules in an introductory science course.