Browsing ETDs: Virginia Tech Electronic Theses and Dissertations by Title
Now showing items 60-79 of 34509
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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 analysis of movers and non-movers to a retirement community
(Virginia Polytechnic Institute and State University, 1987)The purpose of this study was to determine whether significant differences exist between movers and non-movers to a retirement community in the areas of demographic characteristics, residential characteristics of the most ... -
A comparative analysis of the heart rate-oxygen consumption relationship observed during Bruce protocol graded exercise stress tests and steady-state exercise
(Virginia Polytechnic Institute and State University, 1986)Twenty-eight endurance trained male volunteers, 18-41 years or age, were studied to determine whether the heart rate-oxygen consumption relationships observed during Bruce protocol stress tests were similar to those observed ... -
A comparative analysis of the reproductive efficiency of 14 Virginia market type peanut cultivars (Arachis hypogaea L.)
(Virginia Polytechnic Institute and State University, 1986)There is inadequate basic information available on the reproductive efficiency of peanut (Arachis hypogaea L.) cultivars and a need to determine the sources of yield improvement made in peanut over the past four decades. ... -
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 computer simulation techniques in depicting and communicating the visual impacts of timber harvesting in the Jefferson National Forest
(Virginia Polytechnic Institute and State University, 1994)Advances in computer technology have made it possible for designers to manipulate realistic images on a computer screen. Previously, most computer generated images consisted of line drawings or distorted grid perspectives. ... -
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 comparison of thermodynamic models for the prediction of phase behavior in aqueous-polymer two-phase systems
(Virginia Polytechnic Institute and State University, 1986)Aqueous-polymer two-phase systems consist of various combinations of water, polymer(s), low molecular weight component(s), and salts. These aqueous-polymer systems are comprised of two phases, each of which contains about ... -
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 critical assessment of crack growth criteria in unidirectional composites
(Virginia Polytechnic Institute and State University, 1985)The problem examined is an infinite anisotropic layer with a through crack at arbitrary orientation, subjected to uniform in-plane remote loading. The purpose of this study is to gain a better understanding of several ... -
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 documentation and analysis of the physical, operating, and business environments for small-tree handling and harvesting
(Virginia Polytechnic Institute and State University, 1987)Study objectives were 1) to identify successful mechanized thinning and prelogging systems currently operating in the South, 2) to document system characteristics contributing to their success, and 3) to determine which ... -
A finite characterization of K-matrices in dimensions less than four
(Virginia Polytechnic Institute and State University, 1983)The class of real nxn matrices M, known as K-matrices, for t which the linear complementarity problem w-Mz=q, w≥O, z≥O, wtz=O has a solution whenever w-Mz=q, w≥O, z≥O has a solution is characterized for dimensions ... -
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 finite population queueing system with a supporting inventory of spare parts-analysis and design
(Virginia Polytechnic Institute and State University, 1986)In this thesis, a model is developed for a finite population queueing system deployed to meet a constant demand for the situation where failed units require a single spare part to initiate repair action. A supporting ... -
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 heuristic method for the optimal design of water distribution systems
(Virginia Polytechnic Institute and State University, 1987)The water distribution system design problem consists of finding a minimum cost combination of network layout and sizes of system components so as to satisfy flow demands, minimum and maximum head requirements and a ...
