ETDs: Virginia Tech Electronic Theses and Dissertations: Recent submissions
Now showing items 1-20 of 39034
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Teacher Perception of Principals' Transformational Leadership and the Self-Efficacy of Teachers in Selected All-Female Schools in Saudi Arabia
(Virginia Tech, 2021-04-08)A number of studies have addressed the correlations between transformational leadership and its impact on the self-efficacy of teachers. This quantitative, non-experimental study design adds to this growing body of knowledge ... -
PCB Busbar Design and Verification for a Multiphase SiC-based All-electric Aircraft Powertrain Converter
(Virginia Tech, 2023-09-29)The development and implementation of silicon carbine (SiC) devices is steadily increasing facilitating the electrification of aircrafts. In this thesis, a printed circuit board (PCB) based heavy copper busbar design and ... -
Multi-frequency Ultrasound Directed Self-assembly
(Virginia Tech, 2023-09-29)Ultrasound directed self-assembly (DSA) relies on the acoustic radiation force associated with a standing ultrasound wave to organize particles dispersed in a fluid medium into specific patterns. State-of-the-art ultrasound ... -
Experimental Evaluation of Innovative Thermal Energy Storage Options for a Hypersonic Non-Airbreathing Vehicle's Internal Loads
(Virginia Tech, 2023-08-28)Managing the thermal loads inside a non-airbreathing hypersonic vehicle is particularly difficult. The heat generated by the power electronics, avionics, etc. must be removed so that the components do not exceed their ... -
Lord Byron's Scandals and Contemporary Cancel Culture
(Virginia Tech, 2023-09-28)The following is a case study in contemporary cancel culture through three cases of it in the nineteenth century. Lord Byron, Lady Caroline Lamb, and Harriet Beecher Stowe serve as three prominent cases of cancel culture ... -
Borders, Art, and Imagination: Journeys with 'Maré from the Inside' and 'The Frontera Project'
(Virginia Tech, 2023-09-28)This dissertation analyzes the possibilities and limits of art to perform upon borders in the Americas, and to open space for individuals to encounter, experience, and imagine them otherwise. I share the story here of my ... -
Precarious Bodies in Motion: Choreopolitics, Affect, and Flamenco Dissent in Spain
(Virginia Tech, 2023-09-27)This dissertation explores the political potential of dance and dance performances in public protests whereby dancing bodies are capable of performing politics through actions and movements within the boundaries established ... -
The Dynamics of Belonging Among Undergraduate Women in Engineering
(Virginia Tech, 2023-09-26)Broadening participation in engineering has been a pressing focus of engineering education research for decades. Despite efforts to improve engineering access for historically underrepresented groups, progress has been ... -
Evaluating Conservation Agricultural Management for Soil Health Outcomes in Southeastern Virginia
(Virginia Tech, 2023)Improving soil health in agricultural soils is vital as the effects of climate change and an increasingly affluent population are putting a strain on land resources. Conservation agricultural practices such as cover cropping ... -
Detection of Acidovorax citrulli, the Causal Agent of Bacterial Fruit Blotch Disease of Cucurbits, Prevention via Seed Treatments and Disease Resistance Genes
(Virginia Tech, 2021-04-02)Melon (Cucumis melo L.) and watermelon (Citrullus lanatus (Thunb.) Matsum and Nakai) belong to the family Cucurbitaceae. Bacterial fruit blotch (BFB) disease of cucurbits is an economically devastating plant disease that ... -
Near-Net Shaping and Additive Manufacturing of Ultra-High Temperature Ceramics via Colloidal Processing
(Virginia Tech, 2023-09-22)Ceramic colloidal processing routes such as slip casting, gelcasting and direct ink writing provide valuable insight into the role of interaction forces between particles, solvents, and polymeric additives in the rheology, ... -
Observing Drought-Induced Crustal Loading Deformation Around Lake Mead Region via GNSS and InSAR: A Comparison With Elastic Loading Models
(Virginia Tech, 2023-09-22)Lake Mead, the largest reservoir in the United States along the Colorado River on the border between the states of Nevada and Arizona, is one of the nation's most important sources of freshwater. As reported by the U.S. ... -
A User-Centered Design Approach to Evaluating the Usability of Automated Essay Scoring Systems
(Virginia Tech, 2023-09-21)In recent years, rapid advancements in computer science, including increased capabilities of machine learning models like Large Language Models (LLMs) and the accessibility of large datasets, have facilitated the widespread ... -
Seismic Imaging of the Global Asthenosphere using SS Precursors
(Virginia Tech, 2023-09-21)The asthenosphere, a weak layer beneath the rigid lithosphere, plays a fundamental role in the operation of plate tectonics and mantle convection. While this layer is often characterized by low seismic velocity and high ... -
Genome-wide identification of enhancers, transcription factors, and mechanisms that control skeletal muscle differentiation in cattle
(Virginia Tech, 2023-09-21)Skeletal muscle development and growth involve significant changes in gene expression. The overall objective of this dissertation project was to identify transcription factors, enhancers, and mechanisms that control gene ... -
Interacting effects of temperature and food on early growth of two plethodontid salamanders
(Virginia Tech, 2023-09-19)An amphibian's life history includes patterns such as growth, development, and reproduction. These life history traits are essential to the fundamental understanding of population dynamics. Despite the importance of life ... -
Methodological advances in benefit transfer and hedonic analysis
(Virginia Tech, 2023-09-19)This dissertation introduces advanced statistical and econometric methods in two distinct areas of non-market valuation: benefit transfer (BT) and hedonic analysis. While the first and the third chapters address the challenge ... -
Analysis of Environmental-Ethical Concerns Within the United States Funeral Industry
(Virginia Tech, 2023-09-18)This thesis examines the failings in environmental-ethics present in the United States funeral industry, focusing on the lack of environmental ethical guidelines at an industrial and policy level. Utilizing an interdisciplinary ... -
Vertically Propagating Tides in the Martian Atmosphere
(Virginia Tech, 2023-09-18)Atmospheric tides significantly influence the dynamics of Mars' upper atmosphere. The impact of tides on the mean state of the present-day Martian atmosphere is especially large at high altitudes. Certain tides can propagate ... -
Optimal weight settings in locally weighted regression: A guidance through cross-validation approach
(Virginia Tech, 2023)Locally weighted regression is a powerful tool that allows the estimation of different sets of coefficients for each location in the underlying data, challenging the assumption of stationary regression coefficients across a ...
