ETDs: Virginia Tech Electronic Theses and Dissertations
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Virginia Tech has been a world leader in electronic theses and dissertation initiatives for more than 20 years. On January 1, 1997, Virginia Tech was the first university to require electronic submission of theses and dissertations (ETDs). Ever since then, Virginia Tech graduate students have been able to prepare, submit, review, and publish their theses and dissertations online and to append digital media such as images, data, audio, and video.
University Libraries staff are currently digitizing thousands of pre-1997 theses and dissertations and loading them into VTechWorks. Most of these theses and dissertations are fully available to the public, but we will, in general, honor requests by the item's author to restrict access to Virginia Tech only. See our process for Requesting that Material be Amended or Removed.
To search all Virginia Tech print and digital theses and dissertations, use the University Libraries ETD resource guide.
Materials that are restricted to Virginia Tech only may be requested via your own university or public library's Interlibrary Loan program or through the VTechWorks request form that appears when you try to access the item. You might also be able to obtain a copy of the work through ProQuest's database of theses and dissertations. If you are on a Virginia Tech campus but are unable to find the pre-1997 thesis or dissertation you are seeking in VTechWorks, you may also be able to order a physical copy from library storage. Please check the library catalog at http://www.lib.vt.edu/ for physical copies.
The guidelines that apply to Virginia Tech's graduate students as ETD authors can be found at http://guides.lib.vt.edu/ETDguide.
New! - Help video: Searching for Electronic Theses and Dissertations in VTechWorks
Collections in this community
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Doctoral Dissertations [14291]
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Masters Theses [19456]
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Undergraduate Theses [26]
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Virginia Tech ETD Resources [11]
Documentation about creating and formatting Virginia Tech ETDs
Recent Submissions
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The Fusion Enterprise Paradox: The Enduring Vision and Elusive Goal of Unlimited Clean Energy
(Virginia Tech, 2020-01-23)In an age of shrinking research and development (RandD) budgets, sustaining big science and technology (SandT) projects is inevitably questioned by publics and policy makers. The fusion enterprise is an exemplar. The ... -
Nonsmooth Bifurcations and the Role of Density Dependence in a Chaotic Infectious Disease Model
(Virginia Tech, 2020-01-23)Discrete dynamical systems can exhibit rich and interesting dynamics at lower dimensions (and co-dimensions) than that of ODE models. Classically, the minimal dimension to observe chaotic behavior in an ODE model is three; ... -
Cumulative Impacts of Watershed-Scale Hyporheic Stream Restoration on Nitrate Loading to Downstream Waterbodies
(Virginia Tech, 2020-01-23)Excess nutrient pollution and eutrophication are widespread problems that must be solved at watershed scales, and stream restoration is increasingly implemented as a solution. Yet few studies evaluate the cumulative effects ... -
Polymeric Complexes and Composites for Aerospace and Biomedical Applications
(Virginia Tech, 2018-08-01)Polymers, among metals and ceramics, are major solid materials which are widely used in all kinds of applications. Polymers are of particular interest because they can be tailored with desirable properties. Polymer-based ... -
Maintaining the Atom: U.S. Nuclear Power Plant Life and the 80-Year Maintenance Regulation Regime
(Virginia Tech, 2020-01-22)Large, ever more complex, technological systems surround us and provide products and services that both construct and define much of what we consider as modern society. Our societal bargain is the trade-off between the ... -
Fresh Mix Properties and Flexural Analysis with Digital Image Correlation of Additively Manufactured Cementitious Materials
(Virginia Tech, 2020-01-22)Recently, additive manufacturing (AM), or "3D printing," is expanding into civil infrastructure applications, particularly cementitious materials. To ensure the safety, health, and welfare of the public, quality assurance ... -
Impact of Device Parametric Tolerances on Current Sharing Behavior of a SiC Half-Bridge Power Module
(Virginia Tech, 2020-01-22)This paper describes the design, fabrication, and testing of a 1.2 kV, 6.5 mΩ, half-bridge, SiC MOSFET power module to evaluate the impact of parametric device tolerances on electrical and thermal performance. Paralleling ... -
Bifurcations, Multi-stability, and Localization in Thin Structures
(Virginia Tech, 2020-01-22)Thin structures exist as one dimensional slender objects (hairs, tendrils, telephone cords, etc.) and two dimensional thin sheets (tree leaves, Mobius bands, eggshells, etc.). Geometric and material nonlinearities can ... -
Modeling and Manufacturing of Dynamic Vocal Folds: First Steps Towards an Active Voice-Box Prosthesis
(Virginia Tech, 2020-01-22)The movement and control of the vocal folds within the laryngeal cavity enables three crucial physiological functions: 1) allowing respiration by opening, 2) aiding in airway protection by closing, and 3) regulating sound ... -
Evaluation of an Auditory Localization Training System for Use in Portable Configurations: Variables, Metrics, and Protocol
(Virginia Tech, 2020-01-22)Hearing protection can mitigate the harmful effects of noise, but for Service Members these devices can also obscure auditory situation awareness cues. Tactical Communication and Protective Systems (TCAPS) can restore ... -
Production of High-Grade Mixed Rare Earth Oxides from Acid Mine Drainage via Solvent Extraction: Laboratory-Scale Process Development
(Virginia Tech, 2020-01-22)Several recent studies have shown that acid mine drainage (AMD) may be a promising source of rare earth elements (REEs), which are essential feedstocks for many high tech applications and defense products. AMD is a ... -
VOODIO: Proposal for an Online Video Content Creation Tool
(Virginia Tech, 2020-01-22)Video content is a massive source of entertainment, education, and income for a large population of online users. As more reliance upon this medium enters the field of education, formal and informal, people need tools to ... -
Mathematical Modeling and Deconvolution for Molecular Characterization of Tissue Heterogeneity
(Virginia Tech, 2020-01-22)Tissue heterogeneity, arising from intermingled cellular or tissue subtypes, significantly obscures the analyses of molecular expression data derived from complex tissues. Existing computational methods performing data ... -
Salamanders and Science: Place-based Environmental Education in Rural Appalachia
(Virginia Tech, 2020-01-22)The opportunity to learn science by doing authentic science in a rural community is not a common occurrence, yet for over thirty years, a group of dedicated educators have provided the experience of learning field biology ... -
Characterization of Collisional Shock Structures Induced by the Stagnation of Railgun-driven Multi-ion-species Plasma-jets
(Virginia Tech, 2020-01-22)The study of shock-waves in supersonic plasma jets is essential to understanding the complex dynamics involved in many physical systems. Specifically, ion-species separation caused by a shock wave propagating through a ... -
The Crash Injury Risk to Rear Seated Passenger Vehicle Occupants
(Virginia Tech, 2020-01-22)Historically, rear seat occupants have been at a lower risk of serious injury and fatality in motor vehicle crashes than their front seat counterparts. However, many passive safety advancements that have occurred over the ... -
Surface plasmon resonance study of the purple gold (AuAl2) intermetallic, pH-responsive fluorescence gold nanoparticles, and gold nanosphere assembly
(Virginia Tech, 2018-07-31)In this dissertation, I have verified that the striking purple color of the intermetallic compound AuAl2, also known as purple gold, originates from surface plasmons (SPs). This contrasts to a previous assumption that this ... -
Regioselective chlorination of cellulose esters
(Virginia Tech, 2018-07-31)Chemical modification of cellulose has been of growing interest, owing to the abundance and processing challenges of natural cellulose. To date, etherification and esterification are the most effective strategies to modify ... -
Investigation of the Spatiotemporal Evolution of Tropical Cyclone Storm Surge under Sea Level Rise
(Virginia Tech, 2018-07-31)Storm surges induced by tropical cyclones have been ravaging coastal communities worldwide, where a growing number of people reside. Tremendous life and economic losses are caused by tropical cyclones, contributing to more ... -
Assessing Student-Athletes' Motivation: The Development and Validation of the MUSIC® Model of Athletic Motivation Inventory
(Virginia Tech, 2018-07-31)Motivation is a key ingredient of successful athletic performance over time. Although the concept of maximizing motivation has long been of interest to coaches and practitioners, the vast number of motivational theories, ...
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