Physical Sciences and Mathematics Commons^™

A High-Order Eulerian–Lagrangian Runge–Kutta Finite Volume (El–Rk–Fv) Method For Scalar Nonlinear Conservation Laws, J. Chen, Joseph Nakao, J.-M. Qiu, Y. Yang

Mathematics & Statistics Faculty Works

We present a class of high-order Eulerian–Lagrangian Runge–Kutta finite volume methods that can numerically solve Burgers’ equation with shock formations, which could be extended to general scalar conservation laws. Eulerian–Lagrangian (EL) and semi-Lagrangian (SL) methods have recently seen increased development and have become a staple for allowing large time-stepping sizes. Yet, maintaining relatively large time-stepping sizes post shock formation remains quite challenging. Our proposed scheme integrates the partial differential equation on a space-time region partitioned by linear approximations to the characteristics determined by the Rankine–Hugoniot jump condition. We trace the characteristics forward in time and present a merging procedure for …

The Influence Of Generative Artificial Intelligence On Leadership: An Exploration Of Technology Professionals' Perceptions Regarding Leadership, Adaptation, And Organizational Culture In The Digital Age, Paul Thomas Herdman

Theses, Dissertations and Capstones

The emergence of generative artificial intelligence (GenAI) has introduced new complexities for organizational leadership, requiring technology professionals to adapt in real time to evolving digital tools, strategic demands, and cultural dynamics. Although prior research has examined AI’s broad influence on business processes, few studies have explored how technology leaders experience and interpret the leadership challenges and opportunities arising from GenAI. This qualitative dissertation addressed that gap by investigating the perceptions of senior technology professionals regarding GenAI’s influence on leadership roles, competencies, decision making, and organizational culture. Using Lanigan’s (1977) phenomenological method of human science, this study explored the lived experiences …

Line Graphs Of Directed Graphs I, Vaidy Sivaraman, Daniel Slilaty

Mathematics and Statistics Faculty Publications

We determine the forbidden induced subgraphs for the intersection of the classes of chordal bipartite graphs and line graphs of acyclic directed graphs. This is a first step towards finding the forbidden induced subgraphs for the class of line graphs of directed graphs.

Human Recreation Influences Activity Of A Large Carnivore In An Urban Landscape, E. C. Bolas, J. F. Benson, R. V. Blakey

School of Natural Resources: Faculty Publications

No abstract provided.

Northern Bobwhite Habitat Selection During The Nonbreeding Season In A Riparian Corridor In Colorado, J. M. Wolske, A. C. Behney, L. A. Powell

School of Natural Resources: Faculty Publications

No abstract provided.

The Implosion Of The Titan Submersible: A Stress–Strain Experiment, Gregory A. Dilisi, Steven J. Eppell, Richard A. Rarick

2025 Faculty Bibliography

No abstract provided.

Immunofluorescence-Based Detection Of Myc–Egr1 Pathway Activity In P53-Deficient Human Colorectal Cancer Cells, Samantha E. Schultheiss, Lyndsea Skojec, Erick Spears Dr.

Science University Research Symposium (SURS)

Immunofluorescence-Based Detection of MYC–EGR1 Pathway Activity in p53-Deficient Human Colorectal Cancer Cells

The Wnt signaling pathway drives proliferation in the intestinal epithelium and maintains those cells in an undifferentiated state. Dysregulation of this pathway results in uncontrolled proliferation of the intestinal epithelium which can lead to colorectal cancer. These effects are driven by the expression of a common Wnt target gene, MYC. Upregulation of MYC expression by the Wnt signaling pathway, either during normal Wnt signaling or dysregulated Wnt signaling, canonically drives intestinal epithelial cells into a proliferative state. Under a specific cellular context, the loss of functional p53, MYC …

Home Sweet Home: Analyzing Contributive Factors Of Home Selling Prices In The Greater Middle Tennessee Area, Miryana Glavan

Science University Research Symposium (SURS)

After the 2008 housing crisis and the 2020 COVID-19 pandemic, many people speculate that the contemporary housing situation is a seller’s market and that the next housing crisis is on the rise. With the consistency of relevance across all time periods presented by the housing sector, the decision was made to analyze this particular field, as it is evergreen. Data analysis is made regarding key predictive traits of house valuation and sell price. Highlighting important socioeconomic regional discrepancies among other influential factors of house prices is the paramount focus of the statistical analysis. Through data science, this study aims to …

Exploring The Myc-Egr1 Pathway In Human Colorectal Cancer Cells, Jacob L. Dykstra Iii, Bishoy S. Sami, Dr. Erick Spears

Science University Research Symposium (SURS)

The WNT signaling pathway plays a crucial role in the regulation of cell growth and death in the intestinal epithelium and during colorectal carcinogenesis. In the presence of Wnt, MYC is upregulated, which leads to the proliferation of intestinal epithelial cells. Under certain cellular conditions, namely the loss of p53 function common to colorectal tumors, MYC upregulates the expression of the tumor suppressor EGR1, leading to apoptosis. This MYC-EGR1 pathway has been observed in p53-knockout mouse embryonic fibroblasts but has yet to be observed in human cells. These studies aim to assess the activity of the MYC-EGR1 pathway in human …

Movements And Habitat Use Of Silver Carp In The Arkansas And White River, A. L. Althoff, J. L. Kinschuh, D. K. Owens, Jonathan J. Spurgeon, J. N. Stevens, S. E. Lochmann

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

No abstract provided.

Localized Kernel Methods For Signal Processing, Sippanon Kitimoon

CGU Theses & Dissertations

This dissertation presents two signal processing methods using specially designed localized kernels for parameter recovery under noisy condition. The first method addresses the estimation of frequencies and amplitudes in multidimensional exponential models. It utilizes localized trigonometric polynomial kernels to detect the multivariate frequencies, followed by a more detailed parameter estimation. We compare our method with MUSIC and ESPRIT, which are classical subspace-based algorithms widely used for estimating the parameters of exponential signals. In the univariate case, the method outperforms MUSIC and ESPRIT under low signal-to-noise ratios. For the multivariate case, we develop a coordinate-wise projection and registration approach that achieves …

Enhanced Kneser-Type Oscillation Criteria For Second-Order Functional Quasilinear Dynamic Equations On Time Scales, Taher S. Hassan, Elvan Akın, Bassant M. El-Matary, Ioan Lucian Popa, Mouataz Billah Mesmouli, Ismoil Odinaev, Akbar Ali

Mathematics and Statistics Faculty Research & Creative Works

This work presents new Kneser-type oscillation criteria for second-order quasilinear functional dynamic equations defined on arbitrary unbounded above time scales. Our approach employs the Riccati transformation technique in conjunction with the integral averaging method. The results show a significant improvement over recent Kneser-type oscillation criteria. We provided several illustrative examples to highlight the importance of our findings.

Machine Learning-Driven Music Genre Recognition, Redeate Kidanue

All Undergraduate Theses and Capstone Projects

Music is a tool that has been integrated into society for thousands of years; it has influenced social aspects of life and has also aided in communication. Today we have various uses for music that go past our traditional uses for entertainment and self-expression. For example, music therapy has been seen to show improvements in patients with Alzheimer’s disease, depression, and PTSD. Additionally, music has played a role in political movements, demonstrating its emotional power. Social media relies heavily on the music industry as many social media posts include music either in the background, or as the forefront of posts. …

The Rhythm Of Renewables: Minute-By-Minute Insights From Kentucky, David S. Beyerle, Noah M. Stewart, Shaun E. Lavin, Chad C. Alkire, Heather Nikolic, Samuel Kelty, Ezekiel A. Boggs, Declan Boyle, Lawrence E. Holloway, Aron Patrick

Electrical and Computer Engineering Faculty Publications

Kentucky’s renewable energy landscape beats with a distinct rhythm shaped by ever-changing variations in sunlight, wind, rainfall, and the ever-modernizing grid that connects them. This paper analyzes minute-by-minute performance data from seven renewable and storage assets owned and operated by the PPL Corporation in Kentucky, including hydroelectric, solar, wind, and lithium-ion battery systems. Using a full year of synchronized, high-resolution data from multiple sites in the Commonwealth, the study examines daily and seasonal capacity factor trends, explores correlations among generation types, and evaluates their alignment with utility load profiles. Our analysis found 279 hours—about 3.2% of the year—with zero renewable …

Syntheses And Characterization Of Isomeric 3-Bromopropanol Capped Oligoviologens, Marcus Anthony White

Theses, Dissertations and Capstones

The work described in this thesis has generated new oligoviologen structures designed to facilitate the formation of supermolecules that incorporate photoactive and redox-active groups. These viologens have several potential uses; for example, the 4+ oligoviologen (viologen 5) exhibits solvatochromic properties in various polar protic and polar aprotic solvents, indicating suitability for use as a solvatochromic dye. The syntheses of bis(4,4’-bipyridine)ortho-xylene, bis(4,4’-bipyridine)meta-xylene, and bis(4,4’-bipyridine)para-xylene were demonstrated through ¹H NMR characterization and confirmed through literature. Bis(4,4’-bipyridine)ortho-xylene, bis(4,4’-bipyridine)meta-xylene, and bis(4,4’-bipyridine)para-xylene were produced in 68%, 72%, and 54% yields, respectively. 4,4’-Bipyridine-1-[4-(bromomethyl)phenylmethyl]-1’- …

How To Deal With High-Impact Low-Probability Events: Theoretical Explanation Of The Empirically Successful Fuzzy-Like Technique, Juan Ulloa, Aaron Velasco, Olga Kosheleva, Vladik Kreinovich

Departmental Technical Reports (CS)

When making decisions, it is important to take into account high-impact low-probability events. For such events, traditional probability-based approach -- which considers the product of the probability p that this event happens and the probability P that a randomly selected building will be destroyed -- often underestimates risks. Available data has lead to an empirical table that provides a more adequate risk estimate. Most of the entries in this table correspond to the fuzzy-like formula min(p,P). This paper explains this empirical result. Specifically, it explains both the effectiveness of the min formula -- and also explains deviations from this formula.

Finite Hybrid- And Semi-Markov Chains, Jose L. Menaldi, Maurice Robin

Mathematics Faculty Research Publications

The ergodic behaviour of finite Markov chains having also instantaneous transition are considered. Some estimates are obtained which complement our previous work [29]. Also, an optimal switching control model for semi-Markov chains is analysed, without any particular assumptions on the recurrent classes.

Möbius Transformations And Hyperbolic Geometry In The Upper Half-Plane, Emma Bunch

Mahurin Honors College Capstone Experience/Thesis Projects

In this thesis, we discuss several properties of Möbius transformations and hyperbolic geometry, a type of non-Euclidean geometry, in the upper half-plane using tools of complex analysis. We begin with preliminaries for our work, comprising the stereographic projection, the representation of circles and lines in the complex plane, conformal maps, and a result on cross-products, which we include for further development. We proceed to Möbius transformations and discuss their properties, cross-ratios, and various mappings. We additionally provide useful calculations. Lastly, we conclude with the hyperbolic metric in the upper half-plane and explore hyperbolic distance, including its invariance under Möbius transformations. …

Joanne Stubbe And The Mechanistic Study Of Ribonucleotide Reductases, Madysen York

Natural Sciences Student Research Presentations

To catalyze the formation of deoxyribonucleotides from ribonucleotides, the enzyme has to remove an hydroxyl from the ribose sugar part of the molecule (circled in in green) (“Ribonucleotide Reductase”).

The problem is that hydroxyl doesn’t naturally want to break from the base it is attached to, leaving many researchers unable to discern the chemical process going on inside these enzymes that make the bond break possible (Strauss).

Mary Lowe Good And The Development Of Catalytic Solutions For Industrial Processes, Eleanor Heller-Walker

Natural Sciences Student Research Presentations

To study catalysts, Good used Mössbauer spectroscopy, a nuclear technique that measures how atoms absorb and emit gamma rays (“Mössbauer Spectroscopy”). This method helps scientists identify oxidation states, chemical environments, and structural changes in metal containing materials, especially iron.

This data revealed exactly how active metal sites in catalysts behave when exposed to exhaust gases, for example, when carbon monoxide (CO) or nitrogen oxides (NOₓ) contact the surface of the metal.

Sites Of Planet Formation In Binary Systems. Ii. Double The Disks In Df Tau, T. Kutra, B. M. Tofflemire, R. Akeson, G. H. Schaefer, S.-Y. Tang, D. Segura-Cox, C. M. Johns-Krull, A. Kraus, S. Andrews, Eric L.N. Jensen

Physics & Astronomy Faculty Works

This article presents the latest results of our Atacama Large Millimeter/submillimeter Array (ALMA) program to study circumstellar disk characteristics as a function of orbital and stellar properties in a sample of young binary star systems known to host at least one disk. Optical and infrared observations of the eccentric, ∼48 yr period binary DF Tau indicated the presence of only one disk around the brighter component. However, our 1.3 mm ALMA thermal continuum maps show two nearly equal-brightness components in this system. We present these observations within the context of updated stellar and orbital properties, which indicate that the inner …

Water’S Effect On The Decomposition Of Baptisia Australis, Jackson Whiteside, Adeline Beckham, Jeremy Little, Reese Cobb, Darlene Panvini

Science University Research Symposium (SURS)

Detritus, dead organic matter, is an essential part of nutrient cycling in Earth’s ecosystems. If dead organic matter could not be decomposed, dead matter would be amassed everywhere, and its nutrients could not be returned to the soil to nourish living species. Detritivores decompose this dead matter and return its nutrients to the soil. How quickly matter decomposes is influenced by a variety of abiotic factors. One abiotic factor which is of interest to decomposition is water quantity and frequency. This study aimed to test if Baptisia australis decomposes faster in dry or wet conditions. The expected results are that …

Potential Impacts Of Construction On Bat Populations In Warner Parks, Nashville, Tennessee, Jackson Whiteside, Wyatt Fooks, Jeremy Little

Science University Research Symposium (SURS)

Human development continues to alter natural landscapes, often with significant consequences for wildlife populations. Among the most sensitive taxa to such disturbances are bats, which serve vital ecological roles as insect predators, pollinators, and seed dispersers. Because bats depend on specific roosting and foraging habitats, even minor environmental changes can strongly influence their activity and diversity. A new road is proposed through an area of Warner Parks, Nashville, Tennessee which is otherwise untouched. This may affect the biodiversity and the populations of bats as a result. Wildlife Acoustic MiniBat 2 acoustic monitoring equipment was used to gather echolocation calls of …

The Relationship Between Trait Empathy And The Involuntary Mimicry Of Emotion: An Electromyographical Study Of Facial Suppression, Madison E. Dawes, Karlie Souder, Eddie Broad, Htoo Aye, Sian Huai

Science University Research Symposium (SURS)

Abstract

Facial expressions are one of the main communication styles that signify emotion and meaning across cultures and individuals. Despite it being one of our main forms of communication, in many social situations, people are required to suppress or control their emotional expressions to act in a socially acceptable manner. However, research has shown that a person’s facial muscles continue to exhibit subtle muscle and move in expressivity even when attempting to suppress emotions from others. To support this, Dimberg et al. (2002) found that electromyography (EMG) technology can detect these subtle facial movements even if they may be invisible …

Functionalizing Silver Nanoparticles With Histamine, Noah J. Deblanco

Science University Research Symposium (SURS)

Silver nanoparticles (AgNPs) are of increasing interest in biomedical research due to their antimicrobial properties, biocompatibility, and high surface-area-to-volume ratio. A major challenge, however, lies in stabilizing AgNPs under physiological conditions and understanding how their surface interactions influence potential medical applications. This project explores the synthesis of AgNPs using the Turkevich method and investigates their behavior when exposed to varying biological conditions, including changes in pH and temperature. In addition, preliminary efforts are being made to functionalize AgNPs with small biological signaling molecules to evaluate their effects on nanoparticle stability and surface interactions. Characterization is performed primarily through UV-Vis spectrophotometry, …

Effects Of In-Stream Large Woody Debris Management On Riparian Salamander Population Dynamics, Sydney Hermann

Theses, Dissertations and Capstones

The addition of large woody debris (LWD) into streams is an increasingly common habitat restoration method used to support brook trout populations and other sensitive freshwater species. Wood jams create localized reductions of water velocity, increase organic matter retention, intensify overbank flows, and promote habitat heterogeneity. These changes enhance interaction between the floodplain and the stream which can influence forest habitat variables such as leaf litter, soil pH, moisture, and invertebrate abundance. Salamander demographics reflect the stability of these forest habitat variables, and population declines can be indicative of environmental disturbance, stress, or change. Evaluating how this trout-targeted management effects …

Transition Metal Alkoxide Complexes Synthesis Using Thallium Reagents And Design Of Iron(Ii)-Alkoxide Carbene Complexes And Their Reactivity, Lakshani Wathsala Kulathungage

Wayne State University Dissertations

ABSTRACTTRANSITION METAL ALKOXIDE COMPLEXES SYNTHESIS USING THALLIUM REAGENTS AND DESIGN OF IRON(II)-ALKOXIDE CARBENE COMPLEXES AND THEIR REACTIVITY by LAKSHANI WATHSALA KULATHUNGAGE May 2025 Advisor: Dr. Stanislav Groysman Major: Chemistry (Inorganic) Degree: Doctor of Philosophy

This dissertation focuses on the synthesis and reactivity of transition metal and main group metal alkoxide complexes. The dissertation began with exploring a novel, efficient synthetic route towards transition metal alkoxides involving thallium reagents. A novel dimeric Tl2(OCtBu2Ph)2 complex was synthesized in the reaction between a lithium alkoxide and thallium precursor TlPF6. Tl2(OCtBu2Ph)2 served as a convenient precursor to the formation of old and new transition …

Structural Impacts Of Canonical And Non-Canonical Oligonucleotide Modifications, Deepak Shrestha

Wayne State University Dissertations

Nucleic acids, including DNA (deoxyribonucleic acid) and RNA (ribonucleic acids), are the fundamental building blocks of living organisms. The events that cause modification of DNA/RNA are of interest because they impact the nucleic acid function. Targeting DNA is important for treating diseases such as cancer. Cisplatin (cisPt) is a well-studied drug that targets DNA and blocks replication, but its use is limited by adverse side effects and cellular resistance. Prevoius research addressed some of these challenges through development of platinum analogues such as carboplatin and oxaliplatin. Amino acid-linked platinum analogues (AAPt) are the focus of this thesis work. AAPt complexes …

Mass Spectrometry Combined With Chemical Biology To Study Human Ailments, Eric Thomas Jacquerio Davis

Wayne State University Dissertations

Post-translational modifications (PTMs) are essential as chemical changes that regulate protein function, activity, stability, interactions, and localization after protein synthesis. PTMs, such as phosphorylation, acetylation, and ubiquitination, can activate or deactivate proteins, influence their interactions with other molecules, and determine their cellular location. This regulation is vital for numerous biological processes, such as cell cycle control, signal transduction, and gene expression. Abnormal PTMs are linked to various diseases in humans, including parasitic infection, blood disorders, cancers, and neurodegenerative diseases, making their study crucial for understanding disease mechanisms and developing targeted therapies. In the Pflum lab, we are interested in the …

Data For Research Collaboration And Co-Authorship In The Gulf Of Mexico, 2000–2018, Owen Temby, Dongkyu Kim, Juliet Vallejo

Datasets

This dataset documents research collaboration and co-authorship among organizations engaged in environmental science in the Gulf of Mexico from 2000 to 2018. The data were compiled through bibliometric analysis of scientific articles, with each record containing publication-level and author affiliation information, as well as institutional and country codes. The dataset provides the basis for network analysis of collaborative patterns among institutions in the United States, Mexico, and Cuba. Variable definitions and data structure are described in the accompanying README file.