Doctoral Dissertations: Recent submissions
Now showing items 1-20 of 14373
-
Statistical Analysis of Structured High-dimensional Data
(Virginia Tech, 2018-10-05)High-dimensional data such as multi-modal neuroimaging data and large-scale networks carry excessive amount of information, and can be used to test various scientific hypotheses or discover important patterns in complicated ... -
Soil solarization and soil additives as alternatives to preplant fumigation in annual plasticulture strawberry production
(Virginia Tech, 2018-10-04)Fumigation before strawberry (Fragaria�--ananassa Duchesne) planting was a common practice as they are susceptible to numerous pests. Methyl bromide, the colorless, odorless gas, was the chosen fumigant for growers until ... -
Perceptions of the Supports and Professional Development for and needed by Novice School Administrators in Southwestern Virginia
(Virginia Tech, 2020-03-25)The objective of this study was to describe the perceptions of the support and professional development activities for and needed by novice school administrators (NSAs) in southwestern Virginia. A qualitative methods ... -
STM Study of Interfaces and Defects in 2D Materials
(Virginia Tech, 2020-03-23)Two-dimensional (2D) materials show novel electronic, optical and chemical properties and have great potential in devices such as field-effect transistors (FET), photodetectors and gas sensors. This thesis focuses on ... -
Investigating the Virginia Preschool Initiative's Role in Preparing Students for Kindergarten
(Virginia Tech, 2020-03-23)Although many children enter kindergarten having some form of preschool experience, the quality of these experiences differs greatly among the programs that are available to families. This variability can create school ... -
Self-assembly of anisotropic nanostructures and interferometric spectroscopy
(Virginia Tech, 2020-03-20)With the development of controlled and predictable nanoparticle fabrication, assembling multiple nano-objects into larger functional nanostructure has attracted increasing attention. As the most basic structure, assembly ... -
Academic Profiles of Science Students: An Analysis of Longitudinal Data on Virginia Students
(Virginia Tech, 2020-03-20)In recent decades, United States public school education has moved toward standards-based curricula. However, performance on standardized tests may not be representative of subject literacy or workforce preparedness. This ... -
Investigation of Charge Transfer in Metal-Organic Frameworks for Electrochemical Applications
(Virginia Tech, 2020-03-20)High-performance functional electrode materials are critical for the development of electrochemical energy conversion and storage technologies. Among various advanced materials, three-dimensional (3D) porous structures ... -
A Longitudinal Investigation of the Mental Health Benefits of Physical Activity Among Graduate Students
(Virginia Tech, 2020-03-20)Recent evidence showing graduate students to be at an elevated risk of developing mental health problems has attracted the attention of both researchers and non-researchers (Evans, Bira, Gastelum, Weiss, and Vanderford, ... -
Evaluating Collaborative Relationships Between K-12 Public and Private Day Schools in Virginia
(Virginia Tech, 2020-03-19)This study is an evaluation of collaborative relationships between K-12 public and private day schools in Virginia when serving students with special needs. Research on the conditions and barriers of collaborative ... -
The Role Of Education System In Preparing Youth For Agricultural Career Decisions And Aspirations: Exploring Ways To Attract More Youth To Engage In Agriculture And Agricultural Entrepreneurship in Tanzania
(Virginia Tech, 2020-03-18)Youth intention to pursue a career in agriculture and entrepreneurship is influenced by the knowledge they acquire through formal, informal, and nonformal settings. Changing youth perception of agriculture is essential for ... -
Hallucinating Facts: Psychedelic Science and the Epistemic Power of Data
(Virginia Tech, 2020-03-18)This dissertation is a theoretical study of the relationship between digitality, knowledge, and power in the age of Big Data. My argument is that human medical research on psychedelic substances supports a critique of what ... -
Scanning Probe Microscopy Study of Molecular Self Assembly Behavior on Graphene Two-dimensional Material
(Virginia Tech, 2020-03-18)Graphene, one-atom-thick planar sheet of carbon atoms densely packed in a honeycomb crystal lattice, has grabbed appreciable attention due to its exceptional electronic, mechanical and optical properties. Chemical ... -
Event-related Collections Understanding and Services
(Virginia Tech, 2020-03-18)Event-related collections, including both tweets and webpages, have valuable information, and are worth exploring in interdisciplinary research and education. Unfortunately, such data is noisy, so this variety of information ... -
A BIM-based Interoperability Platform in Support of Building Operation and Energy Management
(Virginia Tech, 2020-03-18)Building energy efficiency is progressively becoming a crucial topic in the architecture, engineering, and construction (AEC) sector. Energy management tools have been developed to promise appropriate energy savings. ... -
Geometrical Investigation on Escape Dynamics in the Presence of Dissipative and Gyroscopic Forces
(Virginia Tech, 2020-03-18)This dissertation presents innovative unified approaches to understand and predict the motion between potential wells. The theoretical-computational framework, based on the tube dynamics, will reveal how the dissipative ... -
Application of Automated Facial Expression Analysis and Facial Action Coding System to Assess Affective Response to Consumer Products
(Virginia Tech, 2020-03-17)Sensory and consumer sciences seek to comprehend the influences of sensory perception on consumer behaviors such as product liking and purchase. The food industry assesses product liking through hedonic testing but often ... -
Playing to Win: Applying Cognitive Theory and Gamification to Augmented Reality for Enhanced Mathematical Outcomes in Underrepresented Student Populations
(Virginia Tech, 2018-09-24)National dialogue and scholarly research illustrate the need for engaging science, math, technology, and engineering (STEM) innovations in K-12 environments, most importantly in low-income communities (President's Council ... -
Determining Parameters for a Lagrangian Mechanical System Model of a Submerged Vessel Maneuvering in Waves
(Virginia Tech, 2020-03-16)In this dissertation, an approach for determining parameters for a nonlinear Lagrangian mechanical system model of a submerged vessel maneuvering near waves is presented. The nonlinear model with determined parameters is ... -
Community-based Mixed Method Research to Understand Rapidly Changing Cultural Landscapes
(Virginia Tech, 2018-09-21)Tangible and intangible heritage values of cultural landscapes are becoming lost or transforming under the threat of rapidly changing landscapes. Researcher-oriented documenting methods are missing significant meanings of ...
