Browsing ETDs: Virginia Tech Electronic Theses and Dissertations by Title
Now showing items 3844-3863 of 38538
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A C-based simulation framework for automated guided vehicle systems
(Virginia Tech, 1992)The purpose of this research was to develop and validate a simulation framework for automated guided vehicle systems (AGVSs). The framework that was developed, AGVSF, uses the discrete, next-event simulation method and the ... -
C-Grid as Shear Reinforcement in Concrete Bridge Girders
(Virginia Tech, 2016-03-28)Corrosion of reinforcing steel causes shorter life spans in bridges throughout the United States. The use of carbon fiber reinforced polymer (CFRP) materials as the flexural reinforcement in bridge girders has been ... -
C-H activation: oxidative addition to an iridium(I) center and reactivity of the resulting iridium(III) species
(Virginia Tech, 1992)Thermal reactions of the iridium complex, [Ir(COD)(PMe₃)₃]Cl (COD=1, 5 Cyclooctadiene), with benzene, benzaldehyde, pyridine, and furan yield the C-H addition products of mer-(Me₃P)₃Ir(Phenyl)(H)C! (1), mer-(Me₃P)₃Ir(COC₆H₅)(H)Cl ... -
The ⁴⁴Ca(d,α)⁴²K reaction at 4.0 MeV
(Virginia Polytechnic Institute and State University, 1973)Distorted-wave Born-approximation (DWBA) analysis of direct reactions has proven to be a very useful tool in understanding single- and two-particle transfer reactions and nuclear structure. The 4 MV Van de Graaff accelerator ... -
CAD graphics utilization in the design and marketing phases of textile/apparel product development
(Virginia Tech, 1992)The purpose of this research was to identify the expertise of CAD graphics operators/managers in the design and marketing phases of textile/apparel product development. Additionally, the purposes were to determine the ... -
CAD oriented database for integrated circuit layouts
(Virginia Polytechnic Institute and State University, 1986)Modern integrated circuit layouts are so complex that databases often have to deal with a million or more geometric objects. For circuit and layout designers to be able to cope with such complex circuits, we (tool designers) ... -
A CAD-interactive software package for the synthesis of planar disk cams
(Virginia Tech, 1994-02-14)The objective of this thesis is to provide an interactive system for the graphical design and analysis of planar disk cams. The software written for this thesis, the Cam Design System, operates as an add-on application ... -
A CAD/CAM interface for computer-aided design of cams
(Virginia Tech, 1985-12-15)The purpose of this thesis is to provide a complete package for the design and three dimensional modeling display of cams. The software produced as a part of this work will operate as a module of CADAM to produce cam ... -
A CADAM interface for the computer-aided selection of Timken tapered roller bearings
(Virginia Polytechnic Institute and State University, 1987)This thesis presents an interactive computer-graphics geometry interface that simplifies the tapered roller bearing selection procedure. An applications program has been developed that links the CADAM data base to ... -
CADMADE, an approach towards a device-independent standard for CAD/CAM software development
(Virginia Polytechnic Institute and State University, 1989)Every year thousands of specialized CAD/CAM applications programs are developed to meet the needs of industry, education and research. The international 3-D graphics standard, PHIGS, has proven to be very useful in the ... -
Café of Dance
(Virginia Tech, 2007-05-02)A beginning of questions about architecture and humanity and searching for those answers that begin to initiate the process of design and improving the quality of life. This is an investigation and an understanding of ... -
Caffeine's influence on critical flicker frequency thresholds
(Virginia Tech, 1994)Caffeine's effect on the visual system was investigated. Twelve male and twelve female subjects (aged 18 - 25 years) were measured for Critical Flicker Frequency (CFF) thresholds at 15 levels of retinal illuminance (-1.0 ... -
Calcification by amorphous carbonate precursors: Towards a new paradigm for sedimentary and skeletal mineralization
(Virginia Tech, 2010-11-29)A new paradigm for the formation of calcified skeletons suggests mineralization proceeds through amorphous calcium carbonate (ACC) precursors. The implications of this strategy in carbonate crystallization are widespread, ... -
Calcium and magnesium requirements of Ilex crenata Thunb. "Helleri"
(Virginia Polytechnic Institute and State University, 1983)Rooted cuttings of Ilex crenata 'Helleri' were grown in sand culture with four rates of Ca and Mg (0, 5, 10, and 40 ppm) in a factorial experiment. No increase in total dry weight was achieved by increasing Ca and Mg rates ... -
Calcium and Phosphorus Metabolism in Jersey and Holstein Cows During Early Lactation
(Virginia Tech, 2007-09-11)The objective of this dissertation was to assess the dynamics of calcium (Ca) and phosphorus (P) metabolism in dairy cattle. Hypocalcemia, or a drop in blood Ca, is a common condition near parturition. All cows experience ... -
Calcium carbonate biomineralization: A theoretical and experimental investigation of biomolecular controls on nucleation and growth
(Virginia Tech, 2012-04-30)Organisms have evolved a remarkable ability to mineralize complex skeletons and functional biomaterials. These structures are nucleated and grown in close associaiton with macromolecular assemblages of proteins and ... -
Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging
(Virginia Tech, 2016-06-20)The formation of calcium carbonate (CaCO3) (i.e. scale) in potable water systems has long been a concern in water treatment and distribution. A literature review reveals that CaCO3 scaling issues are re-emerging due to ... -
Calcium-boro-saccharate-gluconate: studies of preparation, toxicology and effect on serum calcium level in cows
(Virginia Agricultural and Mechanical College and Polytechnic Institute, 1942)From the results of the previously described experiments, the following conclusions were drawn: 1. Boric acid increases the solubility of calcium d-saccharate in water. An increase in the concentration of boric acid results ... -
Calcium/Phosphate Regulation: A Control Engineering Approach
(Virginia Tech, 2014-01-10)Calcium (Ca) homeostasis is the maintenance of a stable plasma Ca concentration in the human body in the presence of Ca variability in the physiological environment (e.g. by ingestion and/or excretion). For normal physiological ... -
Calcium: some aspects of subcellular accumulation and distribution in milk
(Virginia Polytechnic Institute and State University, 1988)Distribution and bioavailability of ⁴⁷calcium in milk labeled by extrinsic and intrinsic methods was investigated. Milk from Sprague Dawley rats was labeled by both methods, and milk from a cow was labeled by the extrinsic ...
