Physical Sciences and Mathematics Commons^™

Application Of Polarization Transfer Algorithm In Organic Molecules With Three Nonequivalent Coupled Spins, Dim Safin, Alexander Perepukhov, Sergei Rzhevskiy, Yuri Belousov

Turkish Journal of Physics

Polarization transfer between three $1/2$ nuclear spins in a specially prepared isotopically enriched molecule diethylphthalimide malonate-2-$^{13}$C,$^{15}$N molecule was obtained using the nuclear magnetic resonance (NMR) method. The polarization transfer was performed by implementing a sequence of radio frequency pulses and waiting intervals. Relaxation times and NMR spectrum for the studied nuclei were measured in samples of molecules with natural and enriched isotopes $^{13}$C and $^{15}$N. Measurements of the proton relaxation rate for diethylphthalimidomalonate and diethylpthalimidomalonate-2-$^{13}$C,$^{15}$N showed an increase in relaxation rate by a factor of 4 for protons bound to $^{13}$C,$^{15}$N nuclei. The use of the quantum polarization transfer method …

First-Principles And Deep Learning Frameworks To Predict The Electronic, Magnetic And Electrical Properties Of V-Doped Sic Nanotube, Debarati Dey Roy, Sevda Rzayeva, Sevinj Guluzade, Vusala Nabi Jafarova

Turkish Journal of Physics

Nowadays, with the miniaturization of nanoindustry, we are increasingly interested in doping effects for nanotube systems. In this study, based on density functional theory (DFT) and local spin density approximation (LDA) methods within Hubbard U corrections, the electronic, magnetic and electrical properties of single-wall silicon carbide nanotubes doped with vanadium were theoretically studied. Although the undoped SiC system is nonmagnetic, the V-doped SiC nanotube induces magnetism and the total magnetic moment of this magnetic material is equal to ~1 µB. Density of states calculations indicated that the magnetization of SiC:V single-wall nanotubes mainly comes from the 2p orbitals of carbon …

Corrigendum To “Circular Motion And Thermodynamic Characteristics Of Particles Around A Quintessential Nonrotating Black Hole” [Turkish Journal Of Physcis 49 (3) 2025 72-91], Indrajit Halder, Kamal Lochan Mahanta, Rakesh Ranjan Sahoo

Turkish Journal of Physics

This corrigendum addresses an error in equation (35) in the original published version of this article. This error led to minor inaccuracies in subsequent equations.To correct this oversight and ensure the accuracy of the scholarly record, the corrected equations are provided below for reference. The authors apologize for any inconvenience caused and state that the scientific conclusions are unaffected. Corrected equations ofsection 3.3. [2,3]:

The original article can be accessed at: https://doi.org/10.55730/1300-0101.2777

Self-Assembling Rna Nanostructures Are Highly Sensitive To Environmental Conditions, Jordan Aposhian, Surya Pratap S. Deopa, Scott Horowitz, Joseph D. Yesselman

Chemistry and Biochemistry: Faculty Scholarship

Recent developments in RNA nanotechnology have led to an increase in the design of specific, higher-order RNA structures, which will ultimately be used in drug delivery and immunomodulation applications. As researchers create RNA nanostructures with the intention of making them a standard tool in molecular biologists' toolkits, further investigation is required into the robustness of RNA designs. Primarily, in what different molecular contexts are the designed and intended nanostructures stable? In this work, we show that RNA nanostructure self-assembly is highly sensitive to environmental conditions by using second-order right-angle light scattering. While a test RNA hexagonal grid nanostructure forms correctly …

Assessment Of Polymeric Chloroquine Formulations For Targeted Therapy Of Ulcerative Colitis And Metastatic Colorectal Cancer, Neha Kumari

Theses & Dissertations

Effective targeted drug delivery is a critical unmet need in the management of both ulcerative colitis and metastatic colorectal cancer, where conventional systemic therapies may be hindered by suboptimal efficacy and significant side effects. This thesis explores the development and preclinical assessment of polymeric chloroquine (PCQ)-based nanotherapeutics, leveraging stimuli-responsive designs for disease-specific delivery and action.

For ulcerative colitis, a reactive oxygen species (ROS)-responsive nanogel system was engineered to release PCQ, a macromolecular derivative of hydroxychloroquine, specifically in the inflamed areas within the colon. Nanogels with well-defined size and positive surface charge were synthesized via reversible fragmentation chain transfer (RAFT) polymerization …

Macroinvertebrate Community Dynamics In A Recovering, Hypersaline Estuary, Catherine M. Eckert, Claudia A. Tamez, Erin E. Easton, David Hicks

School of Earth, Environmental, & Marine Sciences Faculty Publications

The Bahia Grande is a 6,500—acre tidal basin located at the southernmost tip of Texas. Tidal flow into this coastal estuary was cut off in the 1930s, causing the basin to dry up for ~70 y. A pilot channel connecting the Bahia Grande to tidal waters was constructed in 2005, allowing flooding of the basin to occur. Throughout the period reported herein (2005–2019), the system remained characterized by persistent spatial and temporal episodes of extreme hypersalinity (>70)—a critical factor influencing estuarine community composition and driving key ecological processes. With additional rehabilitation actions forthcoming, characterization of the estuary is essential …

Perron Theorem Application To A Second-Order Differential Equation With Small Advances, Jason Hendrix

Theses and Dissertations

We analyze a delayed second order differential equation with small delay parameters, proving spectral stability via the characteristic quasi-polynomial and establishing uniform bounds on derivatives of the Green’s function to ensure sign preservation under perturbation, providing a foundation for monotone iteration methods. These results aim to advance the functional-analytic framework for traveling wave solutions in delayed reaction-diffusion systems.

Gowanus Faces A Hidden Threat Beneath Its Neighborhood Boom, Emma J. Rosenberg

Capstones

This article investigates urban redevelopment, climate change and environmental contamination in Brooklyn’s Gowanus neighborhood. The Gowanus Canal itself has been a designated EPA Federal Superfund Site since 2010, this designation does not apply to the land surrounding it where legacy industrial contamination still exists. This includes coal tar from former manufactured gas plants which poses a risk to groundwater and indoor air. Under a 2021 rezoning plan, large-scale residential redevelopment is rapidly moving forward, rising groundwater and increased flooding associated with climate change may exacerbate contaminants. Utilizing agency documents, Community Advisory Group meetings, and conversations with residents, advocates, officials and …

Flooding, Not Just A Rain Problem, Annisha Singh

Capstones

This capstone focuses on the Rockaway Peninsula and how high-tide flooding also known as "sunny-day flooding" is not only affecting Rockaway but neighboring areas, such as Jamaica Bay.

Nontoxic Paints Using Cornstarch As Binders, Maile Prater

Honors Projects

For this project, paints were created using different metal compounds which interacted with cornstarch and pectin to determine whether the metals would coordinate with these polysaccharides to create new types of watercolor paints. The paints that were created were ran through an RGB analysis to determine how much of each RGB color is present in a solution and then were ran through a rheometer to determine how the viscosity differed between each solution.

Discovery Of The Multi-Ion Bridge Intermediate: A Computational Exploration Of The Mechanism For Azomethine Ylide Formation From N-Oxides, Martin J. Neal

Electronic Theses and Dissertations

Density functional theory (DFT) provides a method for calculating the ground-state energies of complex molecular systems through evaluating the electron density instead of the full wave function. When results match either experimental outcomes, calculations with DFT offer a computationally efficient method to help explain chemical phenomena. The transformation of tertiary amine N-oxides to azomethine ylides, a simple route to the precursor for 1,3-dipolar cycloadditions that result in the pyrrolidine scaffolds found in natural products, has received only minimal attention due to concerns that its mechanism includes a highly electrophilic intermediate. Utilizing DFT to model the mechanism of the conversion …

Black Women And Latinas In Stem: A Systematic Review Of Literature, Karin Moore

The Scholarship Without Borders Journal

This systematic review of literature examines scholarly studies conducted on Black women and Latinas in STEM fields and in STEM higher education. Women are underrepresented in STEM, and on average they comprise 27% of the STEM population (National Science Foundation, 2017). Black women and Latinas are even further underrepresented in STEM by making up only 14.58 % and 3% of the employees in STEM industries (Hispanic Heritage Foundation, 2020; National Science Foundation, 2021). Barriers for all women are the focus of much of the body of literature in STEM (Beach et al., 2024; Moore, 2024). Isolating specific challenges Black women …

Steam Distillation And Characterization Of Star Anise: Investigating Aroma And Aromaticity, Natalie Brattain

Discovery Day - Daytona Beach

"Steam distillation is a widely used technique for extracting essential oils from plant materials, allowing for the separation of volatile compounds while minimizing thermal degradation. In this study, steam distillation was used to extract the essential oil of Illicium verum (Star Anise) to investigate the relationship between aroma and aromaticity. While ""aroma"" refers to the sensory perception of a substance’s scent, ""aromaticity"" is a chemical property related to the stability of conjugated ring systems. This distinction for our compound was explored by using chemical characterization of the extracted oil. Following the steam distillation process, gas chromatography (GC) and mass spectrometry …

Lipscomb University Parking Garage Analysis, Morgan Hayes, Reagan Maxwell, Daniel Diaz Tortolero, Dominick Dingus, Michael Ent

Student Scholar Symposium

Many students struggle to easily find parking during the school day at Lipscomb University, and this problem will only be emphasized with the potential removal of the nearby Stokes parking lot (containing 255 spaces). To combat this need and help provide additional room for university growth, we propose the addition of a parking garage west of the Fields engineering building, between Belmont Boulevard and Grandview Drive. This garage would be separated from the current garage behind Fields and be slightly larger, containing about 500 spaces over five levels. We evaluate the current number of parking spaces needed at Lipscomb based …

Mathematical Developments In American Spacecraft Technology, Tylah Grace Lynn, Lauren Reece Terry

Student Scholar Symposium

No abstract provided.

Analysis Of Solutions To Research Methods: Navigating The Infinite Content Of Mathematics, Jesus Navarro

Student Scholar Symposium

In the infinite realm of mathematical research, understanding and communicating complex concepts require structured and logical approaches. However, a variety of research methods are employed in mathematical studies; these may differ in approach, historical context, and other important considerations which can contribute to confusion and a lack of effective communication. The genesis of this research began with personal confusion during my research on "Counting the Uncountable: Life in a World Without Numbers", setting the stage for the central challenge: How do mathematicians explain their research? To answer this issue, we analyzed a variety of mathematical research articles to highlight their …

How Does Vertical Hydroponic Farming Compare To Traditional Soil Farming In Terms Of Crop Yield, Energy Efficiency, And Cost?, Grace Morgan, Grace Henry, Rebecca Meenach, Jeana Odom

Student Scholar Symposium

Vertical hydroponics (hydro “water;” ponics “labor”) is a method of year-round farming that uses water in place of soil and supplies vegetables’ nutrients in a space-efficient setting. It dates back to 500 BC when it was used in the Hanging Gardens of Babylon, a wonder of the ancient world. Thousands of years later, vertical hydroponics has expanded across the globe to supply leafy greens, herbs, and grains. It is typically implemented in dense urban environments where green space is hard to come by as a form of sustainable farming. Our research seeks to answer the question “How does vertical hydroponic …

How Do More Diverse Plantings Lead To More Carbon Accrual In Soil?, Haley Rose Wills, Kaylee Grace Duncan, Alexander Constantin Mazareanu

Student Scholar Symposium

No abstract provided.

To What Extent Do Urban Planning Practices Impact Climate Change In Latin America?, Oliver Orellana, Mitchell Roberts

Student Scholar Symposium

Understanding best practices with regards to urban planning and development is crucial to the success of any city. Given the historical, geographic, and economic state of Latin American countries, the role of these practices in innovation is exceedingly vital. By analyzing sustainability strategies employed in cities to mitigate the effects of climate change, this research will identify which practices are the most sustainable in the long run. Because Latin American countries face their own unique challenges in areas like democratic transition, physical landscape, or economic well-being, gaining understanding as to which practices would most benefit the region is pivotal to …

Validating Pharmacogenomics Generative Artificial Intelligence Query Prompts Using Retrieval-Augmented Generation (Rag), Ashley Rector, Beth Breeden, Jay Dorris

Student Scholar Symposium

This study evaluated the performance of Sherpa Rx, an artificial intelligence platform leveraging large language models and retrieval-augmented generation (RAG) for pharmacogenomics, by validating its performance across key response metrics. Sherpa Rx integrated Clinical Pharmacogenetics Implementation Consortium (CPIC) guidelines with Pharmacogenomics Knowledgebase (PharmGKB) data to generate contextually relevant responses. A dataset (N=260 queries) spanning 26 CPIC guidelines was used to evaluate drug-gene interactions, dosing recommendations, and therapeutic implications. In Phase 1, only CPIC data was embedded; Phase 2 additionally incorporated PharmGKB. Responses were scored on accuracy, relevance, clarity, completeness (5-point Likert scale), and recall. Wilcoxon signed-rank tests compared accuracy between …

A Teacher, Medical Advisor, And Comedian Walk Into A Bar: Table For One, Everything Ai Can Do, Lorelai M. Kline

Student Scholar Symposium

As Generative AI continues to rise in popularity, AI chatbots have emerged as a promising solution for addressing students’ real-world needs. This presentation investigates the development process behind a series of specialized, personality-driven AI assistants—created via the Boodlebox platform—and examines how these chatbots enhance educational experiences and practical applications. The research uses progressive design methodologies, including persona development, natural language processing optimization, and user-centric testing protocols. Examples of personal bots include a historical assistant that interprets contemporary social scenarios through an 18th- to 19th-century perspective and a Spanish-speaking chatbot that leverages playful sarcasm to foster deeper engagement. Preliminary findings show …

Spilling The Tea: Effects Of Uv Disinfection On Bioactive Compounds In South African Rooibos Tea, Sora Ghanem, Leah Ankiah, Yusra Ahmed

Student Scholar Symposium

This study investigated the effects of ultraviolet (UV) light disinfection on key bioactive flavonoid compounds in rooibos tea (Aspalathus linearis). There is an interest in non-thermal food preservation technologies, and UV treatment offers potential advantages for beverage processing. However, concerns exist regarding possible degradation of health-promoting compounds during treatment. Rooibos tea samples were subjected to five UV exposure intensities (0, 25, 50, 75, and 100 mJ/cm²), and concentrations of four major flavonoids (aspalathin, orientin, vitexin, and rutin) were measured using high performance liquid chromatography (HPLC). Surprisingly, most flavonoids showed stability or slight concentration increases at higher UV doses. Aspalathin concentrations …

Exploration Of Euclidean Distances In Five-Dimensional Color Space As Proof-Of-Concept For Identification Of Promising Alternatives To Platinum-Based Cancer Drug Candidates, Kiomi Tanakura, Elena G. Harvey

Student Scholar Symposium

Cisplatin, cis-Pt(NH₃)₂Cl₂, is one of the most successful anticancer drugs of all time. However, it has some negative aspects, including toxicity to healthy cells, side effects, and cost. Our goal in this project is to design metal-based anticancer drugs that would be less expensive, less toxic, and more efficient for cancer patients than cisplatin. To begin this research we calculated Euclidean distances - as used by computerized recognition systems - to compare the properties of colors within seasonal palettes that are proven and visible to the eye. These Euclidean distances were then used …

Unveiling Hidden Hazards: A Complementary Approach To Affordable Non-Destructive Heavy Metal Detection, Mario Faragalla, Gulsin Barwari, Makenzie Brinkoeter, Eimy Lozano-Fuentes, Isabelle Riera

Student Scholar Symposium

History has bestowed upon us vast treasures, with the Victorian Era offering a wealth of gifts, such as vibrant art and even secrets preserved in books of this period. However, concealed within the pigments that bring these works to life lie heavy metals. Not only do they pose significant health risks, but they can also be found within these pieces centuries later. Intrigued by the Winterthur project, Beaman librarians, Jan Cohu and Kayla Rutledge, discovered that our library housed some of these Victorian Era books. From there, the Beaman staff sent an inquiry to the chemistry department and Dr. Weinstein-Webb …

Fermented Foul Play: A Real-World Forensic Scenario To Enhance Student Engagement And Understanding Of Instrumentation And Analytical Data Analysis, Abigail Hoermann, Laci Joy Walmer, Matthew J. Goss

Student Scholar Symposium

A forensic-style investigation was introduced in an upper-level instrumental analysis course to foster collaboration and application of theoretical concepts in a laboratory setting. Students were provided with kombucha samples collected from a simulated crime scene and tasked with determining ethanol concentrations using Gas Chromatography–Mass Spectrometry (GC-MS). By independently preparing serial dilutions, establishing calibration curves, and interpreting mass spectra, they practiced quantitative analytical techniques and engaged in evidence-based problem solving. Notably, Sample C demonstrated elevated ethanol levels (6.4% v/v), suggesting possible adulteration and deepening the forensic narrative. Through this scenario-driven format, students strengthened both their technical competencies and their ability to …

What Does Graptolite Origination And Extinction Reveal About The Cause Of The Late Ordovician Mass Extinction?, Charles E. Mitchell, H. David Sheets, Michael J. Melchin, Chris Holmden

Computer and Data Science Faculty Publications

Assesses the macroevolutionary turnover of paleotropical planktic graptolites during the Late Ordovician Mass Extinction (LOME) via automated sequencing and capture-mark-recapture modeling. Graptolites exhibited a succession of turnover pulses (sensu Elizabeth Vrba) that were coincident with the main phases of the Hirnantian glaciation and during which the Diplograptina experienced declining metapopulation size, elevated extinction, zero species originations, and ultimately, complete extermination. Concurrently, the Neograptina (latest Katian temperate zone immigrants) exhibit pulses of both extinction and adaptive radiation. Thus, the LOME involved intense species selection and the wholesale alteration of the clade diversity structure of a major element of the zooplankton. The …

Linking Shoreline Change, Environmental Forcings, And Sedimentological Resilience In Nourished Beaches Of Cape May And Wildwood, New Jersey, Usa: A Multi-Decadal Synthesis, Divomi Balasuriya, Greg Pope

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

Beach nourishment is a widely used strategy to mitigate coastal erosion, yet its long-term geological impacts remain poorly understood. This study provides a multi-decadal synthesis of shoreline change and sedimentological evolution on the nourished beaches of Cape May and Wildwood, New Jersey, USA. Using shoreline positions from 1991 to 2024, we identify contrasting trajectories: Wildwood exhibits ‘persistent transition’ with severe northern erosion (EPR: −10.0 m/yr) feeding southwards accretion, while Cape May demonstrates a ‘managed equilibrium’ with widespread accretion (mean EPR: +1.15 m/yr). Wave energy correlations account for less than 15% of shoreline variability, indicating natural drivers have been superseded by …

2025 December 18 - Tennessee Weekly Drought Summary, Tennessee Climate Office, East Tennessee State University

Tennessee Climate Office Weekly Drought Summaries

No abstract provided.

A Systematic Study Of Passkey User Experience Consistency, Bernhardt Ramat

Theses and Dissertations

Passkeys have emerged as a more secure authentication method than passwords, providing a passwordless alternative resistant to phishing and credential theft attacks. Despite their growing adoption, a systematic study into the user experience of passkeys across various websites has yet to be conducted. Usability heuristics suggest that users transfer their expectations from one product to another, and therefore, inconsistencies in passkey deployments can increase cognitive load, resulting in frustration and possible rejection. To address this knowledge gap, this paper presents a comparative analysis of the external functional consistency of the passkey user experience across 111 websites. Our research reveals that …

Quantifying Dna Groove Binding Dynamics Of Netropsin Using Optical Tweezers, Jacob Mcnally

Honors Program Theses and Projects

Netropsin is a small molecule that binds to the minor groove of DNA and serves as a model scaffold for DNA-minor groove binding anticancer drugs. Understanding how Netropsin interacts with DNA under mechanical stress is important for characterizing how similar molecules function in biological environments. In this work, we used dual-beam optical tweezers to study how Netropsin binding affects the mechanical behavior of single DNA molecules under applied force. Individual DNA molecules were held under controlled forces while Netropsin was introduced at varying concentrations. Constant-force measurements were used to probe binding dynamics; however, we found binding occurred too rapidly to …