Digital Commons Network^™

A Partial-Turbulence Approach To Estimate Peak Pressures On Low-Rise Buildings With Flat Roofs, Yitian Guo, Chieh-Hsun Wu, Gregory A. Kopp

American Association for Wind Engineering (AAWE) Workshop

No abstract provided.

Computational Methods Of Windborne Debris Trajectories In A Near-Surface Tornadic Field, Guangzhao Chen, Franklin T. Lombardo

American Association for Wind Engineering (AAWE) Workshop

No abstract provided.

Performance-Based Wind Design Of Tall Buildings Considering The Nonlinearity In Building Response, S. Preetha Hareendran, A. Alipour, B. Shafei, P. P. Sarkar

American Association for Wind Engineering (AAWE) Workshop

No abstract provided.

Clemson Commencement Program, May 2021, Clemson University

Clemson Commencement Programs

No abstract provided.

Augmented Solvability Of Nth Degree Polynomials, Joseph Swanson

All Theses

A group is called solvable if its derived series descends to the identity element. Galois discovered that a polynomial is solvable by radicals if and only if its Galois group is solvable. In 1824, Niels Abel published a paper proving the insolvability of a general quintic polynomial. In this paper, we provide two augmented strategies to solve all quintics, and discuss methods for how to make all nth degree polynomials solvable.

The Danger Within: Implications Of Firewood Transport In Invasive Forest Insect And Disease Spread, Angelica Solano

All Theses

Invasive forest insects and diseases are a problem affecting North American forests, and their intracontinental spread can be aggravated through the movement of contaminated firewood. We conducted a scoping review to assess trends and gaps in the existing literature, as well as patterns in behavior related to forest pest dispersal through firewood movement in North America. Of the 76 documents identified through our search, 24 met the inclusion criteria and were categorized based on five identified themes: 1) insect incidence in firewood, 2) insect dispersal via firewood, 3) recreational firewood movement, 4) firewood treatments, and 5) behavior and rule compliance. …

Evaluation Of Physical Parameters And Building Adaptation And Demolition Outcomes, Delaney Mcfarland

All Theses

The relationships between the physical features of buildings and the adaptability of those buildings have become an intriguing topic for many researchers in recent years. Although much research has been published about the theme of building adaptability, evaluating these relationships quantitatively is a relatively new subject. The current thesis aims to create a quantitative model of adaptability by identifying physical features of buildings that have strong, positive relationships with building adaptability. Chapter Two of the current thesis presents a design-based adaptability scoring system that evaluates college campus buildings. Eight physical features of buildings were scored and these scores were calculated …

Science Portfolios Embedding The Nature Of Science, Lauren Simpson, Brooke A. Whitworth

Publications

No abstract provided.

Velocity Optimization In Connected Autonomous Vehicles And Its Impact On Surrounding Traffic, Sumedh Sathe

All Theses

Connected Autonomous Vehicles are equipped with the capabilities of autonomous navigation, Vehicle to Vehicle, and Vehicle to Infrastructure communication, which have the potential to improve fuel and/ or energy efficiency. Velocity optimization is a driving technique that aims to follow a velocity profile that minimizes fuel consumption, energy consumption, idling at traffic lights, and overall trip time. Velocity optimization can be implemented in CAVs by utilizing V2I and V2V capabilities, and optimal control techniques.As CAVs become more ubiquitous, they are likely to interact closely with human driven cars. In such a scenario, it is important to find the right trade-off …

Re-Creating Judith Beheading Holofernes, Originally Painted By Artemisia Gentileschi, In A Real-Time Rendering System, Elizabeth A. Schlesener

All Theses

Artemisia Gentileschi is one of the most renowned female artists of her time, best known for her Baroque style paintings of religious narratives.Judith Beheading Holofernes, originally painted by Gentileschi in 1620-21, now hangs permanently in the Uffizi Gallery of Florence, Italy, the birthplace of the Renaissance. Many Renaissance artists, such as Leonardo da Vinci and Michelangelo, were dedicated to the arts and sciences. For the first time, artists used scientific techniques to replicate real life accurately, including knowledge of linear perspective and human anatomy. As pointed out in the Hockney-Falco thesis, artists used new inventions like the camera-obscura …

Methods For The Electrical Impedance Tomography Inverse Problem: Deep Learning And Regularization With Wavelets, Shyla Rae Kupis

All Theses

Electrical impedance tomography, also known as EIT, is a type of diffusive imaging modality that is non-invasive, radiation-free, and cost-effective for recovering electrical properties within a closed domain from surface measurements. The process involves injecting electrical current into a set of electrodes to measure the voltage on the smooth surface of the domain. The recovered EIT images show how well different materials or tissues within the domain conduct or impede electrical flow, which is helpful in detecting and locating anomalies. For the EIT inverse problem, it is challenging to recover reliable and resolvable electrical conductivity images since it is highly …

Generating Training Data For Machine Learning Applications In Manufacturing Through Purposeful Failure, Ethan Wescoat

All Theses

Manufacturing unexpected downtime contributes a significant cost drain to manufacturers. To reduce unexpected downtime, manufacturers invest in diagnostic and prognostic systems for determining equipment health. These systems help maintenance staff by providing predictions of equipment degradation over time. Based on these predictions, maintenance staff schedule repairs to prevent equipment failure from occurring during production. However, challenges still exist preventing the widespread implementation of these systems in the production environment. The amount and quality of data for training machine learning algorithms to predict these failures are two of these challenges. Existing methods of run-to-failure testing take too long to acquire the …

Rigid Body Dynamics Of Ship Hulls Via Hydrostatic Forces Calculated From Fft Ocean Height Fields, Reagan Samuel Burke

All Theses

An art tool is presented that utilizes a method for simulating the motion of ships in response to hydrostatic forces on the hull from a height-field representation of an ocean surface. Other forces modeled as a PID controller aid to steer the ship and stabilize the motion. The algorithms described can be applied to 3D models of arbitrary shapes composed of polygons "floating" on height fields generated from a myriad of additional spectra. The performance of the method is demonstrated in simple and complex ships, and ocean surfaces of at, medium, and large waveheights.

Privacy-Preserving Image Classification Using Convolutional Neural Networks, David Karl Langbehn

All Theses

The process of image classification using convolutional neural networks (CNNs) often relies on access to large, annotated datasets and the use of cluster or cloud-based computing resources. However, many classification applications such as those in healthcare or defense introduce privacy concerns that prevent the collection of such data and the use of pre-existing large scale computing systems. Although many solutions to privacy preserving machine learning have previously been explored, the added computational complexity incurred with training on encrypted values inhibits these systems from executing in real-time. One of the most promising solutions that facilitates secure machine learning is secure multi-party …

Efficient Automated Driving Strategies Leveraging Anticipation And Optimal Control, Robert Austin Dollar

All Dissertations

Automated vehicles and advanced driver assistance systems bring computation, sensing, and communication technologies that exceed human abilities in some ways. For example, automated vehicles may sense a panorama all at once, do not suffer from human impairments and distractions, and could wirelessly communicate precise data with neighboring vehicles. Prototype and commercial deployments have demonstrated the capability to relieve human operators of some driving tasks up to and including fully autonomous taxi rides in some areas. The ultimate impact of this technology’s large-scale market penetration on energy efficiency remains unclear, with potential negative factors like road use by empty vehicles competing …

The Effect Of Homeowner Behavior On Energy-Efficiency In A High-Performance Home, Lindsey A. Beates

All Theses

A case study was performed on a high-performance home from August 2020 through January 2021 to determine the effect of homeowner behavior on the energy consumption of the home. Overall, there is a significant lack of research into the intersection of human behavior and high-performance homes, and this study aims to provide an additional set of data to further industry knowledge in this crucial area. The builder was consulted to aid in the creation of an accurate energy model using the BEOpt software, and his guidance to the occupants was incorporated into an expected set of behaviors. The timeframe was …

Generation And Manipulation Of Higher Order Fractional And Integer Bessel Gaussian Beams, Wenzhe Li

All Dissertations

Optical orbital angular momentum (OAM) describes orbiting photons, swirling local wave vectors, or spiraling phase distribution depending on what theory we use to explain light. If we consider light as a propagating electromagnetic wave, then light has the freedoms of frequency, magnitude, phase, and polarization. For a monochromatic light, expanding the later three freedoms spatiotemporally, numerous optical modes are solved from Maxwell’s equations and boundary conditions. OAM mode study starts from integer charge because it is in the integer form of the fundamental phase singularity structure.

Fractional OAM mode is the Fourier series of integer OAM modes. The average OAM …

Developing A Novel Neutron Spectrometer Using The Inverse Bonner Sphere Concept For International Safeguards, Mara Watson

All Dissertations

Accurate neutron measurements in international safeguards are dependent on the knowledge of significant sources of neutrons emitted in an item, which can include neutrons from induced or spontaneous fission and (alpha, n) reactions. In particular, the neutron energy spectrum is needed to accurately characterize the detector response to neutrons of a range of energies. Neutron energy spectra for neutron emitters in international safeguards are typically not well-established, particularly for (alpha, n) reactions. A novel neutron spectrometer using the inverse Bonner sphere concept was developed in this work to experimentally establish neutron energy spectra for international safeguards purposes. Well-characterized neutron sources, …

Negotiating Disciplinary Literacy Instruction In Secondary Science: A Multi-Case Study, Arsenio Silva

All Dissertations

National science proficiency scores in America have failed to show significant improvement for years (www.nationsreportcard.gov, 2019). Although policy reforms have come and gone in attempt to influence these trends, Disciplinary Literacy (DL) theory currently stands center-stage as one of the most recently espoused approaches to improving students’ scientific illiteracy. However, the field of DL theory is ideologically fragmented and offers little in terms of applicable strategies for practitioners (Fang, 2012a). Consequently, enacting DL instruction requires teachers to draw on highly specialized disciplinary knowledge and experience to inform their application of an incomplete DL theoretical framework (Saraceno, 2019). Yet, research shows …

Promoting Dual Language Learners’ Social And Emotional Development Through Creative Drama: A Case Study, Qianyi Gao

All Dissertations

The demographic landscape in the U.S. is changing rapidly, and early childhood programs are experiencing an increase in the enrollment of Dual Language Learners (DLLs). The current study focused on the social and emotional aspects of DLL students and employed a case study design to explore the impact of creative drama on young DLLs’ social and emotional development. Six DLL students enrolled in a Head Start center participated in the 9-week creative drama intervention. Results from the paired t-tests showed that participants’ social and emotional skills improved significantly after the intervention. Qualitative data further revealed that participants demonstrated improvements in …

Innovative Thermal Management Systems For Autonomous Vehicles — Design, Model, And Test, Shervin Shoai Naini

All Dissertations

Emphasis on reducing fossil fuel consumption and greenhouse gas emissions, besides the demand for autonomy in vehicles, made governments and automotive industries move towards electrification. The integration of an electric motor with battery packs and on-board electronics has created new thermal challenges due to the heat loads' operating conditions, design configurations, and heat generation rates. This paradigm shift necessitates an innovative thermal management system that can accommodate low, moderate, and high heat dissipations with minimal electrical or mechanical power requirements.

This dissertation proposes an advanced hybrid cooling system featuring passive and active cooling solutions in a thermal bus configuration. The …

"It Comes With The Job": A Mixed Methods Study On Teacher Mental Health, The School Environment, And School Leader Practices, Jacquelyn N. Williams

All Dissertations

Teacher mental health is situated between multiple factors in the education system. At one end, teacher mental health is influenced by the school environment and the practices of their school leaders. Meaning, the quality of a school’s environment and how a school leader develops that environment as either positive or negative can affect teacher experiences of well-being or distress. On the other end, teacher mental health can influence instruction, learning environments, and their intentions to move. Given that the mental health of teachers can be advantageously or adversely influenced by their surrounding school environment and leader, it is necessary to …

Mapping Middle School Mathematics Teachers' Curriculum Assemblages: A Post-Qualitative Inquiry, Hilary Rene Tanck

All Dissertations

In my post-qualitative inquiry, I investigated four middle school mathematics teachers’ curriculum work during the COVID-19 pandemic. Curriculum has been undergoing a transformation as teachers have greater access to online resources and digital tools (Pepin et al., 2017; Webel et al., 2015). The transformation was further exacerbated by the changes forced by COVID-19 as teachers scrambled to reimagine their curriculum systems in a different context—virtual, hybrid, and concurrent. This study used a post-qualitative approach branching away from traditional linear notions of curriculum to one that is complex, dynamic, and creative. The goal was to create a space to consider curriculum …

Short-Term Variability Of Atmospheric Tides In Earth’S Mesosphere And Lower Thermosphere Region, Komal Kumari

All Dissertations

In the early 2000’s, advances in satellite observations and the development of whole atmosphere models led to a paradigm shift in our understanding of what drives space climate/weather in near-Earth space. In addition to solar and magnetospheric driving influences from above, it was realized that meteorological events (such as changes in convection, tropical cyclones, sudden stratospheric warmings, El Niño, to name just a few) are important drivers of space climate/weather due to the generation and upward propagation of atmospheric waves (tides, planetary waves (PW), and gravity waves (GW)) from lower atmospheric sources. Atmospheric tides are key to understanding the global-scale …

Exploring The Role Of Youth-Adult Relationships In Promoting Positive Outcomes Of Youth: An Application Of The Rhodes’ Mentoring Model, Alexandra Sandoval

All Dissertations

The rates of participation in out-of-school time (OST) programs have risen substantially for all youth. High quality OST programs offer youth opportunities for developmental growth through participation in a variety of ways, including building life skills, providing leadership experiences, and offering opportunities to build relationships with their peers and important non-parental adults. Research in OST programming has found that youth may gain differential benefits from participating in different types of OST activities, with many youth reporting that they participate in more than one OST activity or program. OST programs have also been noted for their ability to promote aspects of …

Exact Controllability And Inverse Problem For The Mindlin-Timoshenko System, Jason Alexander Kurz

All Dissertations

In this dissertation we primarily focus on the Mindlin-Timoshenko (MT) plate system, which is a strongly coupled two dimensional system consisting of a wave equation and a system of isotropic elasticity, that arises in modeling plate vibrations especially at high frequencies and thicker plates. We prove two results regarding the MT system. Namely, the exact controllability of the system and an inverse problem result. We demonstrate the exact controllability of the system via an indirect control technique that proves a two-level indirect inverse observability estimate for the diagonalized system. For the inverse problem, we prove the global uniqueness of recovering …

The Fundamentals Of Fretting Crevice Corrosion Of Metallic Biomaterials For Orthopedic Implants, Dongkai Zhu

All Dissertations

Metallic medical devices have been widely used in clinical applications, especially for joint arthroplasty or joint replacement surgery. Fretting corrosion, one of the most common forms of mechanically-assisted corrosion (MAC), has become a major concern associated with orthopedic medical devices. Crevice corrosion, a second mechanism of corrosion related to metallic medical devices, is a second factor of corrosion for many circumstances in medical devices that is an additional factor in the overall corrosion performance of these implants. It is a form of localized corrosion of metal surfaces present within the gap or crevice between two adjoining interfaces. The relationship and …

The Community Of Inquiry Effect On Learning For An Online Course, Robert Dawson Coffey

All Dissertations

Technology is transforming higher education by removing geographic constraints for both students and instructors and increasing learning and cooperation with internet-based applications. Bloom’s taxonomy continues to play a significant role in instructional design for both the classroom and online, but other theories that address the challenges of designing and teaching effective online courses have emerged. Also, classroom techniques, many learned as a teaching assistant in graduate school, may not transfer to an online environment. The Community of Inquiry framework (CoI), which originated in 1999 in response to online education, emphasizes the importance of teaching, social, and cognitive presences as necessary …

Uncovering The Nonlinear Dynamics Of Origami Folding, Sahand Sadeghi

All Dissertations

Origami, the ancient art of paper folding, has found lots of different applications in various branches of science, including engineering. However, most of the studies on engineering applications of origami have been limited to static or quasistatic applications. Origami folding, on the other hand, could be a dynamic process. The intricate nonlinear elastic properties of origami structures can lead to interesting dynamic characteristics and applications. Nevertheless, studying the dynamics of folding is still a nascent field. In this dissertation, we try to expand our knowledge of fundamentals of origami folding dynamics. We look at the problem of origami folding dynamics …

Black, Confident, And Capable: The Science Student Beliefs Of Four Black Male Science Students In A Rural Middle School Science Classroom, Adeyanju Okungbowa

All Dissertations

Lacking in educational research are the positive narratives of Black male students and their science classroom learning experiences, as told through the voices of Black male science students. This study highlighted the normative scientific practices found in A Framework for K-12 Science Education that four Black male science students experienced during a cells unit in their rural middle school science classrooms. Their shared science-student beliefs centered around the themes of confidence and capabilities, behaviors matter, the perceptions and expectations held by self and others and the utility of the normative scientific practice. These study findings provided a counter-narrative to the …