Browsing ETDs: Virginia Tech Electronic Theses and Dissertations by Title
Now showing items 37463-37482 of 38450
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Vacation queues with Markov schedules
(Virginia Polytechnic Institute and State University, 1988)Vacation systems represent an important class of queueing models having application in both computer communication systems and integrated manufacturing systems. By specifying an appropriate server scheduling discipline, ... -
Vaccine Development Against Porcine Epidemic Diarrhea Virus Utilizing the Hepatitis B Virus Core Antigen Protein
(Virginia Tech, 2018-01-11)Porcine epidemic diarrhea Virus (PEDV) is a virus effecting swine. It is the cause of disease that manifests with symptoms ranging from depression, to severe dehydration and death. Young piglets are particularly susceptible ... -
Vacuum Assisted Resin Transfer Molding (VARTM): Model Development and Verification
(Virginia Tech, 2003-04-14)In this investigation, a comprehensive Vacuum Assisted Resin Transfer Molding (VARTM) process simulation model was developed and verified. The model incorporates resin flow through the preform, compaction and relaxation ... -
Vacuum Assisted Resin Transfer Molding of Foam Sandwich Composite Materials: Process Development and Model Verification
(Virginia Tech, 2001-10-12)Vacuum assisted resin transfer molding (VARTM) is a low cost resin infusion process being developed for the manufacture of composite structures. VARTM is being evaluated for the manufacture of primary aircraft structures, ... -
A vacuum permealbility test for compacted clay
(Virginia Polytechnic Institute, 1968)A vacuum permeability test utilizing high hydraulic gradients has been devised for compacted clay of low permeability. The test induces easily measurable flow rates in virtually impervious soils by placing a vacuum at the ... -
Vacuum Steam Technology for Rapid Plasticization and Bending of Maple
(Virginia Tech, 2011-05-12)Bending wood dates back to antiquity in the form of baskets from willow branches and when boats were no longer made of hollowed out logs. Fresh growth willow twigs are readily bent into practically any shape; however, when ... -
Vacuum-Assisted Resin Transfer Molding (VARTM) Model Development, Verification, and Process Analysis
(Virginia Tech, 2000-04-11)Vacuum-Assisted Resin Transfer Molding (VARTM) processes are becoming promising technologies in the manufacturing of primary composite structures in the aircraft industry as well as infrastructure. A great deal of work ... -
VaDeR: Visualizing a Development Record A Study of Claims-Centric Scenario-Based Design
(Virginia Tech, 2004-06-28)The scenario-based design process, particularly with an emphasis on claims, captures and shares design knowledge that has promise in teaching design. However, the best methods are not fully understood yet. This thesis ... -
A valence bond for several perturbations
(Virginia Polytechnic Institute and State University, 1973)A valence bond perturbation method is developed for the purpose of treating the pi electron spectra of molecules related to a parent conjugated hydrocarbon molecule. A spectral perturbation reflects the change in pi electron ... -
Validating an Icelandic Version of the MUSIC Model of Academic Motivation Inventory
(Virginia Tech, 2015-11-13)Students' motivation generally declines during the middle school years, a period of time when important foundations for further studies are laid. There is a move in many countries to improve science education, especially ... -
Validating Body Condition Indices As Indicators Of Individual Quality: Does Condition Explain Intraspecific Variation In Reproductive Success And Survival Among Crimson Finches (Neochmia Phaeton)?
(Virginia Tech, 2013-11-05)Body condition is expected to reflect individual quality because high quality individuals should be better at acquiring and using resources, resulting in higher fitness. However, the hypothesis that condition indices are ... -
Validating Teamology in Domestic and International Setting
(Virginia Tech, 2015-12-14)In recent years, collaboration between different companies especially global collaboration on oversea product development becomes more and more popular. Forming efficient product design team becomes an important concern ... -
Validating the Vroom-Yetton normative model of leader behavior in field sales force management and measuring the training effect of Telos on the leader behavior of district managers
(Virginia Tech, 1978)Statement of the Problem Despite strong evidence that effective leadership by district managers is important for organizational success, there is a void of research dealing with the application of leadership theories and ... -
Validation and Application of a First Principle Flotation Model
(Virginia Tech, 2015-08-18)A first principle flotation model has been derived from the basic mechanisms involved in the bubble-particle and bubble-bubble interactions occurring in flotation. It is a kinetic model based on the premise that the energy ... -
Validation and application of a model of human decision making for human/computer communication
(Virginia Polytechnic Institute and State University, 1983)Decision making in a parallel human/computer system is considered. In this type of system, those tasks for which the computer identical to has the decision making responsibility tasks for which the human are has responsibility. ... -
Validation and Characterization of a Laboratory Ion Source for Testing Thermal Space-Plasma Instruments
(Virginia Tech, 2019-10-17)Prior to launch, space craft instruments need to be tested in a relevant environment to prove operational functionality. Thus, we have developed an ion source to stimulate thermal plasma instruments in a vacuum chamber. ... -
Validation and Marker-Assisted Selection of Two Major Quantitative Trait Loci Conditioning Fusarium Head Blight Resistance in Wheat
(Virginia Tech, 2005-12-06)Fusarium head blight (FHB) is one of the most destructive diseases of common wheat (Triticum eastivum L.) worldwide. Resistance to FHB is an ideal trait for which molecular marker assisted selection (MAS) would facilitate ... -
Validation and Uncertainty Quantification of Doublet Lattice Flight Loads using Flight Test Data
(Virginia Tech, 2018-07-19)This paper presents a framework for tuning, validating, and quantifying uncertainties for flight loads. The flight loads are computed using a Nastran doublet lattice model and are validated using measured data from a flight ... -
Validation of a 3-D Virtual Acoustic Prototyping Method For Use In Structural Design
(Virginia Tech, 2006-01-17)Virtual acoustic prototyping (auralization) is the rendering of a virtual sound field that is created from the calculated acoustic response of a modeled structure. Auralization is useful in the design and subjective ... -
Validation of a food checklist for oncology patients
(Virginia Tech, 1993-05-08)A Food Checklist, based on the Food Guide pyramid, was developed and validated as a quick method to determine the adequacy of dietary energy and protein intakes in cancer patients. Food intake data were monitored for 34 ...
