Digital Commons Network^™

Aboveground Biomass Estimation Of Pastures Using Field Robotics, Jasanmol Singh

All Theses

Pastures cover a major part of the agricultural land in the United States. These prominent land covers need finer maintenance to boost biomass production and optimize consumption. A vital factor in this process is the precise knowledge of the forage availability. This study focused on the development of sensor-based systems for estimating the aboveground biomass in pastures. The study was conducted on Alfalfa and Bermudagrass, which are the widely grown legumes and grasses in the country for grazing and hay production. This study compared the performance of five different crop height measurement systems and a vegetation coverage measurement system for …

Genetically-Encoded Optical Barcodes For Single-Cell Analysis, Daniel Pritko

All Theses

Cell barcodes are capable of being used to answer many different biological questions. They have been used to track the lineage of cells to identifying the function of a gene. While there are multiple different methods to creating cell barcodes, they are limited in their scalability and application. In a previous publication we propose and computationally prove an optical single-cell barcoding method that bridges fast and scalable readouts with the benefits of genetic encoding. In this approach fluorescent proteins (fps) are combined to form fluorescent barcodes that can then be analyzed using a spectral flow cytometer. Here, we test the …

Degradation Products And Microbial Communities Associated With The Conversion Of Five Long-Chain Fatty Acids Relevant For Anaerobic Co-Digestion Of Fog With Sludge, Claire Funk

All Theses

Anaerobic digestion is a technology that allows wastewater treatment plants to convert sludge to energy by recovering the biogas produced during the breakdown of proteins, carbohydrates, and lipids. Furthermore, adding fats, oils, and greases (FOG) through co-digestion with wastewater sludge can increase energy production as lipids have a higher methane yield than proteins and carbohydrates. However, adding FOG can also lead to operational problems in the digester due to the potential accumulation of certain long-chain fatty acids (LCFAs). Current research is limiting in the degradation pathways of prominent LCFAs in FOG and the microbial communities responsible for their degradation

The …

Extraction Of Neutron-Gamma Irradiated Diffusion Pump Oils, Cooper L. Tillman

All Theses

This work successfully demonstrates solvent extraction methods for separation of oil from the by-products when two commercially available vacuum pump oils were exposed to an intense neutron and gamma-ray radiation environment. Nuclear fusion power at a commercial scale has accelerated the need for radiation resistant vacuum technology, such as oil-based diffusion pumps. Polyphenyl ether and aromatic silicone oils were irradiated at the Rhode Island Nuclear Science Center (RINSC) up to MGy absorbed doses with neutron and gamma-ray radiation. Solvent extractions were performed using hexane and isopropanol to characterize the oil extraction as a function of total absorbed dose. The by-products …

Clemson University Board Of Trustees, Finance And Facilities Committee, 2024 July 18, Clemson University Board Of Trustees

Minutes

No abstract provided.

An Examination Of Educators’ Approaches And Strategies When Facilitating Field Study Science Observations, Steph Dean, Devin A. Jones

Publications

The untapped potential of field study science is not being fully recognized or explored within the United States despite the recorded benefits of outdoor learning within K-12 settings. This research study contributes to the broader understanding of the affordances of field study science as an essential component of science education by investigating the approaches teachers adopt when facilitating scientific observations in an outdoor setting as well as specific strategies that support implementation. Engaging in qualitative content analysis allowed us to consider the descriptive concepts represented within K-12 teachers’ narratives as we determined patterns within the transcript documents. Seven themes were …

Curbing The Campus Mental Health Crisis: The Role Of Extracurricular Activity Participation, Rosanne Villemaire-Krajden, Erin Barker

Journal of Youth Development

Rates of distress on post-secondary campuses are alarmingly high, calling for a shift towards learning environments that better address emerging adults’ holistic needs. This cross-sectional, mixed-method study examines the role that extracurricular activity participation can play in such approaches. Online survey data was collected from 302 undergraduate students (M_age = 21.3) to assess extracurricular activity participation prior to and during their university attendance, across quantitative indicators (i.e., type and number of activities). Students’ qualitative accounts of the influence of their extracurricular activity participation on their development and wellbeing was examined using thematic analysis. Results indicate that rates of …

Course Syllabus - Information Design For Public Action, Hannah Nabi

Civic Engagement & Voting Rights Teacher Scholars

No abstract provided.

Selecting Fertilizer Mixtures For Fertigation, Bhupinder Jatana, Tom Grayson Sanders Iii

Horticulture

Depending upon the physio-chemical properties of the fertilizer solution, many fertilizers, both solid and liquid, are suitable for fertigation (application of fertilizer dissolved in irrigation water). However, some fertilizer materials are incompatible with concentrated solutions, can react with minerals in irrigation water, or with pesticides in tank mixes, and form insoluble compounds and precipitates. Precipitation of fertilizers renders them unavailable for plant uptake and could further clog the micro-irrigation systems. This article talks about fertilizers, fertilizer formulations, fertilizer compatibility, and criteria for selecting fertilizer mixtures for fertigation. This information will be helpful for growers utilizing fertigation as a means to …

Connecting The Dots: Sharing Hidden Histories Of Regional Inventors’ Patents, John Schlipp, Kris Kallies

Journal of the Patent and Trademark Resource Center Association

Patent and Trademark Resource Centers (PTRCs) support inventors, entrepreneurs, and researchers with patent and trademark information. Some PTRCs share regional patent history as part of their community outreach. This article focuses on PTRCs that have developed online databases and published works documenting regional patents, thereby providing hidden historical insights for historians, genealogists, and students. It spotlights the development of Georgiavation, a historic patent database developed by the PTRC at Georgia Southern University. Finally, this article offers guidance for libraries, museums, and other institutions interested in documenting their state or regional patent histories. This can result in a more inclusive narrative …

Clemson Commencement Program, May 2024, Clemson University

Clemson Commencement Programs

No abstract provided.

Jane Jacobs, Cyclist, Peter L. Laurence

Publications

No abstract provided.

Exploring The Influence Of Teacher-Child Interactions On Preschoolers' Challenging And Disruptive Behaviors, Alisha Grimes

All Dissertations

none

Understanding Road Users’ Use And Misuse Of Fluorescent And Retroreflective Materials At Night, Savana King

All Dissertations

Nighttime pedestrian fatality rates in the U.S. continue to rise. Nighttime visibility aids – including retroreflective garments – can enhance the conspicuity of pedestrians to drivers at night. Yet, pedestrians rarely take advantage of retroreflectivity and instead often wear fluorescent garments that are not useful at night. This research explored whether road users’ misunderstandings of two critical principles – retroreflectivity and fluorescence – support the misuse of visibility-enhancing garments. This project also explored whether materials that combine retroreflectivity and fluorescence (“combined-performance materials”) circumvent road users’ misconceptions. Two experiments quantified observers’ expectations for how bright fluorescent, retroreflective, or fluorescent-retroreflective materials will …

Release Of Small Molecules From Rubber: Effects Of Materials Properties, Mechanical Loading And Molecular Interactions, Yongcan Du

All Dissertations

Release of small molecules from polymeric materials has wide applications in the delivery systems of active molecules such as drug, fragrance, and semiochemical. Rubber materials are good candidates for the excipients of those systems due to properties such as good flexibility, permeability, and biocompatibility. Factors like material properties, mechanical loading, and molecular interactions may affect the release of small molecules in those systems. Therefore, understanding how those factors affect the release is key to the formulation, design, and evaluation of those systems.

To study the effects of materials properties, vulcanized natural rubber sheets with different crosslink densities, loaded with small …

A Comprehensive Materials Approach To Thermal Management In Fiber Lasers, Bailey Meehan

All Dissertations

Optical fiber-based amplifiers and lasers enable a great many useful devices and conveniences. Unfortunately, however, they can generate considerable heat during operation that drives the need for complex cooling solutions, thus reducing many of the size, weight, and power (SWAP) benefits for which fiber lasers are known. Additionally, at elevated temperatures, thermally-driven phenomena, such as Transverse Mode Instability (TMI), can be induced that limit the power-scaling of fiber lasers. The focus of this Dissertation is to explore novel approaches to thermal management in fiber lasers through judicious materials science and engineering to obviate the aforementioned limitations. Fibers studied in this …

The Development Of A Convenient And Consistent Methodology For Flight Proficiency To Certify Multi-Rotor Uas Pilots For State Departments Of Transportation, Colin Dees

All Dissertations

To fly an unmanned aircraft system (UAS), commonly referred to as a “drone,” the Federal Aviation Administration (FAA) requires pilots to pass a knowledge test. There is no requirement at the state or federal level for drone operators to demonstrate the ability to operate a UAS. The National Institute of Science and Technology (NIST) has created an exam for public and private entities to assess basic UAS flight proficiency. It is the only nationally recognized flight proficiency protocol. NIST does not provide a scoring recommendation and leaves it to the user to determine the minimum criteria to pass. There is …

Examining Formative Leadership Experiences Of District Science Coordinators Using Collective Case Study, Khushbu Singh

All Dissertations

Leadership in educational institutions can significantly impact the quality of education and student outcomes (Ferrell & Garner, 2023; Leithwood et al., 2008). District Science Coordinators (DSCs) play a pivotal role as district-level leaders responsible for enhancing science education (Whitworth et al., 2017). Despite increased attention from researchers and policymakers, a knowledge gap persists regarding DSCs' formative experiences in their leadership roles and their impact on teachers and students (Whitworth & Chiu, 2015). This dissertation focused on two research questions: first, the challenges and/or supports that DSCs encountered during their formative years, and second, the knowledge, practices, and attributes they considered …

Intrinsically Disordered Proteins And Their Role In Biomolecular Condensates, Danielle Latham

All Dissertations

Proteins are biomacromolecules responsible for the functions of life. While classically proteins are thought to be well structured in order to perform a specific function, 50% of proteins within Eukaryotic cells contain intrinsically disordered regions (IDRs), regions with no well-defined structure. IDRs are often used for cell signaling, responding to external factors such as temperature changes or the presence of small molecules. To understand how IDRs can function without structure, it is important to understand the dynamics of such systems. Understanding IDR intramolecular and intermolecular interactions will shed light on IDR dynamics. Intramolecular interactions are first explored using fluorescence spectroscopy …

The Machine In The Rice Field: A Spatial Analysis Of Mechanized Rice Processing Infrastructure Along The Cooper River, 1780 - 1830, Jacob Hockenberry

All Theses

This thesis examines the spatial and physical characteristics of mechanized rice processing infrastructure along the Cooper River in South Carolina’s Lowcountry between 1780 and 1830. Historic rice plantation plats and modern geospatial data provided new information regarding the location of rice processing machines in relation to other plantation landscape features. This research analyzed seven rice plantations that contained these machines. Each plantation plat was georeferenced using ArcGIS Pro to support a detailed spatial analysis of these processing sites. While literature has extensively detailed the social, economic, environmental and enslaved aspects of rice culture in the Lowcountry, little research has specifically …

Engineering Sustainable Bridge Deck Rehabilitation: Evaluating Mechanical And Electro-Chemical Properties Of Rapid-Set Patching Materials And Their Influence On Repair Durability, James Roberts

All Theses

As the state of the US infrastructure continues to deteriorate over time, a prominent issue especially in the field of reinforced concrete structures has been the ability to properly rehabilitate and extend the design service life of these structures. A majority of our existing reinforced concrete bridges were built in the construction boom during the 60’s, 70’s and 80’s, and were originally designed with a service life of approximately 50 years, thus showing that many structures are close to or have already exceeded their intended service life. Additionally, with a poor history of government infrastructure funding, it is seen to …

Application Of An Information Gain Model In A Motor Learning Task: An Application In A Laparoscopic Surgical Skills Task, Matthew Ball

All Theses

Psychomotor skills are comprised of physical movements and mental adaptations of movements to complete a task, generally using complex tools or components. Laparoscopic surgery training tasks are a prime example of tasks requiring psychomotor skills due to their demand for both fine hand movements and constant mental adaptation to the changing environment of the human body. A typical evaluation of these skills can be accomplished using learning curves, a graphical representation of skill growth in which a performance metric is plotted over a time experience metric. Previously, in the literature, several learning curves have been generated from the performance within …

Studying Superconducting Thin Films For Quantum Computing Applications, Bernardo Jaime Langa Junior

All Theses

Superconducting qubits have emerged as a promising platform for realizing error-corrected quantum computing. Reaching the minimum threshold for error correction requires scaling the number of qubits well beyond the current numbers while improving their coherence and minimizing their crosstalk. Such daunting demands require groundbreaking innovations in the design of superconducting quantum circuits as well as in engineering the materials integrated into the devices. This thesis explores materials solutions for two different scalability problems: 1) crosstalk and 2) loss due to surface oxidation. The crosstalk is addressed by making voltage-tunable superconductor-semiconductor Josephson junctions (JJs). For the loss due to surface oxidation, …

Exploring Creative Placemaking Of Americana Outdoor Music Festivals In The Southeastern United States, Tyler Spencer

All Theses

Large outdoor music festivals have been a part of the American experience since the 1930s and are creative gatherings, economic engines, and vehicles of place attachment. This research draws on theoretical constructs of Creative Placemaking, the Biophilia Hypothesis, and Musicophilia to understand outcomes of outdoor Americana music festivals in the Southeastern United States from the perspective of the managers/organizers of these events. Interview data was collected from managers/organizers representing fifteen outdoor Americana music festivals in the Southeastern United States. The data was organized into nine thematic categories, and these were distilled into five key themes associated with the outcomes of …

Efficacy Of Virtual Reality-Based Simulations In Training Aviation Maintenance Technicians On Maintenance Procedures, Gayatri Anoop

All Theses

The COVID-19 pandemic forced institutions of higher education (IHEs) to halt in-person classes and transition to online platforms. Given the intricate process of adapting hands-on experiments to the online environment, this transition seemed particularly challenging for Science, Technology, Engineering, Mathematics, and Medicine (STEMM) labs. The abrupt nature of this transition added to the difficulties, given that the IHEs were inadequately prepared for seamless continuity during the pandemic. In the first phase of this project, a literature review was conducted to understand the impact of COVID-19 pandemic on education. Specifically, the review explored the challenges that institutions of higher education faced, …

Investigation Of Domain Formation During Phase Separation In A Mixture Of Flexible And Rigid Biopolymers, Steven Huntley

All Theses

Complex fluids and heterogenous mixtures composed of multiple types of polymers are found throughout industrial and biological fluid systems. For example, extrusion based additive manufacturing systems pass dense mixtures of polymers through the extrusion heads to deposit composite polymeric materials. In cells, active and complex mixtures of biopolymers self-organize into assemblies that perform critical physiological functions.

Polymers in dense solutions undergo phase separation as a result of differences in physiochemical properties. A few examples of these properties include charge, structure, rigidity, and hydrophobicity. We observe the formation of polymer domains composed of rigid and a flexible biopolymer species that phase …

The Lost Cause Of Unionism: How Greenville Became A Failed Stronghold Of Unionism In Antebellum South Carolina, Candace Rae Boatwright

All Theses

Greenville County, South Carolina was created in the aftermath of the Revolutionary War. The boundaries that define Greenville follow the natural topography of its mountains and rivers, but also permanently mark its relationship with the historic location of the Cherokee Nation as well as distinguishing it from North Carolina. Through the Regulation Movement and the Revolutionary War, the politics of the backcountry of South Carolina were molded by the men who occupied and laid claim to the land. The primary driver of political decisions was the protection and expansion of personal and community economics.

In this paper I argue that …

Elucidating The Impact Of Casting Solvent On Vanadium Ion Transport In Solution-Cast Ionomer Biocomposites Containing Lignin, Zhongyu Wang

All Theses

This paper attempts to investigate the influence of solvent choice to the Nafion-lignin proton exchange membranes that used in the vanadium redox flow batteries. The influence of two different solvents: DMF and DMSO were investigated in this paper. Results show that when using DMSO as solvent, Nafion-lignin membranes' vanadium ion cross over can be greatly reduced in comparing with membranes prepared from DMF. Also, membranes prepared from DMSO also show higher water uptake ability and lower ion exchange capacity than the membranes prepared from DMF. This paper has also investigated the influence of lignin type to the membranes. Results show …

Analyzing An In-Line Compression Management System For Improved Performance In A High-Performance Computing Environment, Steven Platt

All Theses

High-performance computing (HPC) has enabled advancements in computation speed and resource cost by utilizing all available server resources and using parallelization for speedup. This computation scheme encourages simulation model development, massive data collection, and AI computation models, all of which store and compute on massive amounts of data. Data compression has enhanced the performance of storing and transferring this HPC application data to enable acceleration, but the benefits of data compression can also be transferred to the active allocated memory used by the application. In-line compression is a compression method that keeps the application memory compressed in allocated memory, decompressing …

Yield And Nutritive Quality Of Fresh And Ensiled Reduced Lignin Alfalfa In Monoculture And Diculture With Novel Tall Fescue, Morgan Boss

All Theses

The objectives of this research were to: (1) evaluate the yield, nutritional value, and digestibility of fresh and ensiled reduced lignin alfalfa (RLA; Medicago sativa L.) in monoculture and when mixed with novel endophyte-infected tall fescue (F; Festuca arundinacea) in comparison to a conventional alfalfa (CA) cultivar; and (2) evaluate ensiled samples under varying DM concentrations; with or without inoculant. A trial was prepared as a randomized complete block design with 4 replicates per treatment. Treatments included reduced lignin alfalfa (RLA), conventional alfalfa (CA) and tall fescue (F) plots as well as RLA/F and CA/F plots. Plots were harvested on …