Doctoral Dissertations: Recent submissions
Now showing items 1-20 of 14592
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Data Filtering and Modeling for Smart Manufacturing Network
(Virginia Tech, 2020-08-13)A smart manufacturing network connects machines via sensing, communication, and actuation networks. The data generated from the networks are used in data-driven modeling and decision-making to improve quality, productivity, ... -
Integrated Model-Based Impact Assessment of Climate Change and Land Use Change on the Occoquan Watershed
(Virginia Tech, 2019-02-19)Forecasted changes to climate and land use were used to model variations in the streamflow characteristics of Occoquan watershed and water quality in the Occoquan reservoir. The combination of these two driving forces has ... -
Digital-Based Zero-Current Switching (ZCS) Control Schemes for Three-Level Boost Power-Factor Correction (PFC) Converter
(Virginia Tech, 2020-08-11)With the increasing demands on electronic loads (e.g. desktop, laptop, monitor, LED lighting and server) in modern technology-driven lives, performance of switched-mode power supply (SMPS) for electronics have been growing ... -
Is Gloss a cue for Real-World Object Size?
(Virginia Tech, 2020-08-10)Two separate lines of research in object recognition are studies of materials perception and studies of real-world object size perception. Recent object size investigations of texture indicate mid-level features may cue ... -
Hydrothermal Transport in the Panama Basin and in Brothers Volcano using Heat Flow, Scientific Deep Sea Drilling and Mathematical Models
(Virginia Tech, 2019-02-15)Two-thirds of submarine volcanism in the Earth's ocean basins is manifested along mid-ocean ridges and the remaining one-third is revealed along intraoceanic arcs and seamounts. Hydrothermal systems and the circulation ... -
Mechanics of Phase Transformation in NiTi Shape Memory Alloys at The Atomistic Scale
(Virginia Tech, 2019-02-14)During the past decade, Shape Memory Alloys (SMAs), particularly Nickel-Titanium (NiTi) alloys, have received increasing attention mainly because of their promising role to be integrated into multifunctional systems for ... -
Numerical Investigations of Geologic CO2 Sequestration Using Physics-Based and Machine Learning Modeling Strategies
(Virginia Tech, 2020-08-06)Carbon capture and sequestration (CCS) is an engineering-based approach for mitigating excess anthropogenic CO2 emissions. Deep brine aquifers and basalt reservoirs have shown outstanding performance in CO2 storage based ... -
Essays on the Management of Online Platforms: Bayesian Perspectives
(Virginia Tech, 2020-08-06)This dissertation presents three essays that focus on various aspects pertaining to the management of online platforms, defined as "digital services that facilitate interactions between two or more distinct, but interdependent ... -
Optimization Methods for Distribution Systems: Market Design and Resiliency Enhancement
(Virginia Tech, 2020-08-05)The increasing penetration of proactive agents in distribution systems (DS) has opened new possibilities to make the grid more resilient and to increase participation of responsive loads (RL) and non-conventional generation ... -
Hybrid Modeling and Simulation of Stochastic Effects on Biochemical Regulatory Networks
(Virginia Tech, 2020-08-04)A complex network of genes and proteins governs the robust progression through cell cycles in the presence of inevitable noise. Stochastic modeling is viewed as a key paradigm to study the effects of intrinsic and extrinsic ... -
Buying to Thrive: Exploring the Potential for Market-Based Approaches to Contribute to Increases in Diet Diversity in Mozambique
(Virginia Tech, 2020-08-04)Globally, more than two billion people suffer from deficiencies in micronutrients that are essential for human health. Low-income populations in low- and middle-income countries are especially vulnerable to these deficiencies. ... -
Distributed Machine Learning for Autonomous and Secure Cyber-physical Systems
(Virginia Tech, 2020-07-31)Autonomous cyber-physical systems (CPSs) such as autonomous connected vehicles (ACVs), unmanned aerial vehicles (UAVs), critical infrastructure (CI), and the Internet of Things (IoT) will be essential to the functioning ... -
Three Essays on the Evolution of the Determinants of Educational Attainment and its Consequences
(Virginia Tech, 2019-02-07)The dissertation focuses on the different determinants of education, their effects on the educational outcome, and the overall effect of education on the lifetime consequences. The first chapter focuses on the inequality ... -
Chemical and Physical Modifications of Semicrystalline Gels to Achieve Controlled Heterogeneity
(Virginia Tech, 2019-02-07)Sulfonated polyaromatic hydrocarbon membranes have emerged as desirable candidates for proton exchange membranes (PEMs) due to their excellent mechanical properties, high thermal and chemical stability, and low cost. ... -
Syrian Refugee Fathers Perceptions of Identity and Family Dynamics in the U.S. after Displacement
(Virginia Tech, 2019-02-07)At the end of 2016, approximately 65.6 million individuals were displaced forcibly around the world because of generalized violence, persecution, violation of human rights, or conflict such as civil war (UNHCR, 2016). The ... -
Investigating Awareness-Supporting Techniques in Co-located Sensemaking
(Virginia Tech, 2019-08-07)Co-located sensemaking has benefitted from multi-user multi-touch devices such as tabletops and wall-mounted displays. Sensemakers use these displays to establish personal workspaces in which to perform individual sensemaking ... -
The Greenway Trail in Community Development: An examination of value, representation, and distribution of benefits among stakeholders
(Virginia Tech, 2020-07-28)Greenway trails, or linear community parks, are growing in popularity around the world and are increasingly prevalent in cities of all sizes in the United States. At their best, greenways can provide affordable transportation, ... -
Glucose Metabolism in Low Birth Weight Neonatal Pigs
(Virginia Tech, 2019-02-04)The neonatal period in mammals is characterized by high growth rates and is dominated by skeletal muscle hypertrophy. Low birth weight (LBWT) neonates experience restricted growth and development of skeletal muscle, leading ... -
Attention Modification to Attenuate Facial Emotion Recognition Deficits in Children with ASD
(Virginia Tech, 2019-02-04)Prior studies have identified diminished attending to faces, and in particular the eye region, in individuals with Autism Spectrum Disorder (ASD), which may contribute to the impairments they experience with emotion ... -
Thermomechanical and Vibration Analysis of Stiffened Unitized Structures and Threaded Fasteners
(Virginia Tech, 2019-02-01)This dissertation discusses the thermomechanical analyses performed on threaded fasteners and curvilinearly stiffened composite panels with internal cutouts. The former problem was analyzed using a global/local approach ...
