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 [14297]
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Masters Theses [19464]
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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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Multisensory Integration in Social and Nonsocial Events and Emerging Language in Toddlers
(Virginia Tech, 2019-12)Multisensory integration enables young children to combine information across their senses to create rich, coordinated perceptual experiences. Events with high intersensory redundancy across the senses provide salient ... -
Deep Representation Learning on Labeled Graphs
(Virginia Tech, 2020-01-27)We introduce recurrent collective classification (RCC), a variant of ICA analogous to recurrent neural network prediction. RCC accommodates any differentiable local classifier and relational feature functions. We provide ... -
Characterizing spatiotemporal variation in LAI of Virginia Pine Plantations
(Virginia Tech, 2020-01-27)Loblolly pine is an important managed tree species within the southeastern United States, and better understanding spatial patterns in its productivity has potential to contribute to both modeling and management of the ... -
A Defense-In-Depth Security Architecture for Software Defined Radio Systems
(Virginia Tech, 2020-01-27)Modern wireless communications systems are constantly evolving and growing more complex. Recently, there has been a shift towards software defined radios due to the flexibility soft- ware implementations provide. This ... -
Long-term Effects of Prescribed Fire and Fire Surrogate Treatments on Southern Appalachian Mountain Forest Soil Chemistry
(Virginia Tech, 2020-01-27)As a response to rising wildfire hazard and forest structure and composition concerns, the National Fire and Fire Surrogate Study was established in 2000 to determine how fuel reduction and ecosystem restoration techniques ... -
To Mix or Not to Mix: Performance and Management of Diverse Cover Crop Mixtures
(Virginia Tech, 2020-01-27)Cover crops (CC) are planted in between cash crops to improve soil quality and to supply nitrogen (N) to cash crops through biological N fixation or soil N scavenging. Most producers use single species CC, in part because ... -
The Epigenetic Role of EGR1 during Postnatal Mammalian Brain Development
(Virginia Tech, 2018-08-03)DNA methylation is an epigenetic mechanism critical for tissue development, cell specification and cellular function. Mammalian brains consist of millions to billions of neurons and glial cells that can be subdivided into ... -
Passivated-Electrode Insulator-Based Dielectrophoretic Chips for Rare Cell Analysis
(Virginia Tech, 2018-08-03)The analysis of potentially harmful biological particles is imperative for the mitigation of disease. As a result, there is a growing need for tools which can characterize, detect, and separate biological particles for the ... -
Regional Differences in the Spatial Patterns of Precipitation Bands in Hurricanes Through Landfall along the Gulf of Mexico and Atlantic Coasts of the United States
(Virginia Tech, 2018-08-03)Evolutionary periods of precipitation distribution in tropical cyclones (TCs) are sometimes misrepresented in numerical weather prediction models due to the rapid nature of TC structure changes that accompany intensity ... -
THE ROLE OF IKZF FACTORS IN MEDIATING TH1/TFH DEVELOPMENT AND FLEXIBILITY
(Virginia Tech, 2020-01-24)The ability of cells within the adaptive immune system to develop into specialized subsets allow for a robust and tailored immune response in the advent of an infection or injury. Here, CD4+ T-cells are a crucial component ... -
Effect of Standard Post-harvest Interventions of Fresh Vegetables on Bacterial Community Dynamics, Pathogen Survival and Antibiotic Resistance
(Virginia Tech, 2018-08-02)Food-borne illness outbreaks are occasionally associated with fresh-vegetable consumption, in part due to lack of a microbial inactivation step before consumption. Raw manure or improperly composted manure applied as soil ... -
Increasing Branch Coverage with Dual Metric RTL Test Generation
(Virginia Tech, 2018-08-02)In this thesis, we present a new register-transfer level (RTL) test generation method that makes use of two coverage metrics, Branch Coverage, and Mutation Coverage across two stages, to cover hard-to-reach points previously ... -
Effectiveness of Intersection Advanced Driver Assistance Systems in Preventing Crashes and Injuries in Left Turn Across Path / Opposite Direction Crashes in the United States
(Virginia Tech, 2019)Intersection crashes represent one-fifth of all police reported traffic crashes and one-sixth of all fatal crashes in the United States each year. Active safety systems have the potential to reduce crashes and injuries ... -
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 ...
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