Browsing Doctoral Dissertations by Title
Now showing items 1-20 of 14916
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1. Tests of the coupled shock tube/mass-spectrometer technique ; 2. The pyrolysis of neopentane by atomic resonance absorption spectrophotometry
(Virginia Polytechnic Institute and State University, 1982)Part 1 The coupled shock-tube/mass spectrometer apparatus is characterized in terms of its capabilities for chemical kinetic studies. Criteria for doing kinetic measurements by this experimental technique are discussed. ... -
The 1H and 13C dynamic nuclear polarization (DNP) enhancement for novel silica phase immobilized nitroxide (SPIN) samples
(Virginia Tech, 1991-12-06)The solid/liquid intermolecular transfer (SLIT) flow dynamic nuclear polarization (DNP) experiment potentially provides new methodology for studying interfacial phenomena (e.g., weak hydrogen bonding). In addition, the ... -
3-D Bio-inspired Microenvironments for In Vitro Cell Migration
(Virginia Tech, 2015-10-21)Cancer metastasis is the leading cause of death related to cancer diseases. Once the cancer cells depart the primary tumor site and enter the blood circulation, they spread through the body and will likely initiate a new ... -
3D Massive MIMO and Artificial Intelligence for Next Generation Wireless Networks
(Virginia Tech, 2020-04-13)3-dimensional (3D) massive multiple-input-multiple-output (MIMO)/full dimensional (FD) MIMO and application of artificial intelligence are two main driving forces for next generation wireless systems. This dissertation ... -
3D Micromachined Passive Components and Active Circuit Integration for Millimeter-wave Radar Applications
(Virginia Tech, 2012-02-20)The development of millimeter-wave (30-300 GHz) sensors and communications systems has a long history of interest, spanning back almost six decades. In particular, mm-wave radars have applications as automotive radars, in ... -
4D combustion and flow diagnostics based on tomographic chemiluminescence (TC) and volumetric laser-induced fluorescence (VLIF)
(Virginia Tech, 2016-12-02)Optical diagnostics have become indispensable tools for the study of turbulent flows and flames. However, optical diagnostics developed in the past have been primarily limited to measurements at a point, along a line, or ... -
6.78MHz Omnidirectional Wireless Power Transfer System for Portable Devices Application
(Virginia Tech, 2021-01-11)Wireless power transfer (WPT) with loosely coupled coils is a promising solution to deliver power to a battery in a variety of applications. Due to its convenience, wireless power transfer technology has become popular in ... -
A biosystematic revision of the Nearctic species of the mayfly genus Isonychia (Ephemeroptera: oligoneuriidae)
(Virginia Polytechnic Institute and State University, 1982)The Nearctic species of the genus Isonychia Eaton are revised. Eighteen species are recognized, of which three are described as new; eleven species names are placed in synonymy. Isonychia campestris McDunough is recognized ... -
A case study of North Carolina desegregation issues: influence patterns of federal and state courts and state statutes
(Virginia Polytechnic Institute and State University, 1976)Problem: This study sought to analyze the influence patterns among federal court decisions, state appellate court decisions, and state statutes pertaining to the desegregation of public schools in North Carolina. Sources ... -
A comparative study of the perceived behavioral dispositions of female and male superintendents
(Virginia Polytechnic Institute and State University, 1976)This study examined the behavioral dispositions of female and male superintendents in order to determine if differences do, in fact, exist between these two groups. Specifically, the following research questions were ... -
A comparison of goal perceptions at community colleges and community college components of four-year institutions in West Virginia
(Virginia Polytechnic Institute and State University, 1976)The purpose of this study was to determine if differences existed in the perceptions of administrators, full-time faculty members and student personnel workers between three separate community colleges and three other ... -
A computer-assisted technique for planning minimum impact transmission right of way routes
(Virginia Polytechnic Institute and State University, 1976)A computer-assisted system was developed as an aid in the process of planning and evaluating the impact of electric transmission rights of way. The system was designed to facilitate the objective analysis of proposed ... -
A descriptive analysis of planning structures and functions as perceived by superintendents and practiced and perceived by planning incumbents in medium student population school districts (15,000-25,000) in the United States
(Virginia Polytechnic Institute and State University, 1976)The study was based on the need for descriptive information on comprehensive planning as it currently exists in educational institutions and to make the information available to the profession. The problem of this study ... -
A finite element analysis of adhesively bonded composite joints including geometric nonlinearity, nonlinear viscoelasticity, moisture diffusion and delayed failure
(Virginia Polytechnic Institute and State University, 1987)A two-dimensional finite-element computational procedure is developed for the accurate analysis of the strains and stresses in adhesively bonded joints. The large displacements and rotations experienced by the adherends ... -
A finite element, Navier-Stokes study of the confined, laminar flow over a downstream facing step
(Virginia Polytechnic Institute and State University, 1984)The two-dimensional, confined, laminar flow over a downstream facing step was studied using a finite element, Navier-Stokes equation solver. The weak form of the stationary, incompressible Navier-Stokes equations in primitive ... -
A functional analytic approach to multigroup transport theory
(Virginia Polytechnic Institute and State University, 1975)A functional Analytic method which was first introduced by Larsen and Habetler for the one-speed isotropic case in 1973 is applied to full and half-space multigroup problems in one dimension with a constant and invertible ... -
A genetic analysis of reproduction in growth selected lines of chickens
(Virginia Polytechnic Institute and State University, 1976)Genetic and physiological aspects of egg production patterns and their relationships with growth parameters were studied utilizing S₁₅, S₁₆(R₃) and S₁₇(R₄) generation pullets from lines selected for high (HW) and low (LW) ... -
A medicaid resident assessment-based statewide analysis of intermediate care nursing homes
(Virginia Polytechnic Institute and State University, 1989)Through development of a conceptual model and an index measure based on actual performance, this dissertation focused on clarifying what is"very good" (and"very bad") in nursing home quality. The model expanded on the ... -
A method of data collection for the evaluation of forest harvesting systems
(Virginia Polytechnic Institute and State University, 1984)A unified international method to capture, record, and report the information necessary for documenting the mechanical performance of harvesting machines and systems under specified conditions is presented. It provides a ...
