Search
Now showing items 1-10 of 13
Hybrid Active Power Filter with Output Impedance Control
(Virginia Tech, 2006-05-24)
In an ideal world, unwanted or undesirable effects in a system could and would be completely ignored. In fact, this was the case in mid-80s' PC design when an 80286 microprocessor running at a "blazing" 12 MHz was considered ...
Test of Light Speed Constancy With Light Age Using an Active Fiber-Based Mach-Zehnder Interferometer
(Virginia Tech, 2006-05-10)
This thesis investigates the constancy of light speed with respect to the light age using an active fiber-based Mach-Zehnder interferometer (MZI) illuminated by sunlight. The original sunlight in one arm, which has the age ...
Implementation of Third Order Plate Theory for use in Existing Finite Element Software
(Virginia Tech, 2006-05-12)
Sandwich plates and layered composites are common in many structural applications because of their combination of high stiffness and low weight. These plates combine top and bottom layers of high Young's modulus with ...
Magnetic Induction for In-situ Healing of Polymeric Material
(Virginia Tech, 2006-05-19)
The field of self-healing materials is growing dramatically due to the obvious in- centive of having structural materials with the ability to repair damage. Some polymers have demonstrated the ability to heal from damage ...
Durable Sandwich Structure Joining Technology for NASA's Ares V Launch Vehicle
(Virginia Tech, 2010-02-05)
Joining of uniformly-curved composite sandwich panel segments, typical in state of the art aerospace launch vehicles, should be mass-efficient. Adhesively bonded joints can provide increased mass-efficiency over ...
The influence of land use on the quality of seston in southern Appalachian stream ecosystems
(Virginia Tech, 2006-05-12)
Seston is the complex of organic and inorganic particles suspended in the water column in stream ecosystems. This detrital pool is a significant vector of energy and nutrients from headwaters to the ocean. Many of the ...
Empirical Essays in Earnings and Labor Markets in Developing and Transition Economies
(Virginia Tech, 2006-05-12)
This dissertation is a collection of three empirical essays on Albania and Iran. In December of 1990, the communist system in Albania came to an abrupt end. The collapse of communism led to a number of macroeconomic reforms ...
Reputation-based Trust Framework for Service Oriented Environments
(Virginia Tech, 2008-10-24)
We investigate the problem of establishing trust in service-oriented environments. We focus on providing a reputation framework that would enable trust-based interactions with and amongst Web services. We define methods ...
Developing and Testing a Combustor Simulator For Investigating High Pressure Turbine Aerodynamics and Heat Transfer
(Virginia Tech, 2006-07-20)
Within a gas turbine engine, the turbine nozzle guide vanes are subjected to very harsh conditions from the highly turbulent and hot gases exiting the combustor. The temperature and pressure fields exiting combustors are ...
The Impact of Applicant Disability on Personnel Managers' Evaluative Judgments
(Virginia Polytechnic Institute and State University, 1986)
This study was the investigation of the effects of five factors related to hiring handicapped individuals. The five factors were psychological disability, physical disability, no disability, and a good or poor work record. ...