Search
Now showing items 1-10 of 3357
Propagation and Scattering of Waves by Terrain Features
(Virginia Tech, 2000-06-13)
The intent of this dissertation is to obtain estimates of the effects of natural terrain features on the propagation and scattering of waves. It begins with the rough knife obstruction case, moves into rough surfaces and ...
Alternative Responses to the Orange County Bankruptcy: An Inquiry into the Images Underlying Theory
(Virginia Tech, 2000-08-18)
The bankruptcy of the government of Orange County, California in 1994 is treated as a case study depicting a potentially critical problem emerging for democracies. The analysis links finan-cial and fiduciary perspectives ...
The Relationship Between Learning Style and Conventional or Modular Laboratory Preference Among Technology Education Teachers in Virginia
(Virginia Tech, 2000-04-17)
This study investigated the relationship between the laboratory environments and the learning styles of middle school technology education teachers in the Commonwealth of Virginia. Based on the assumption that a strong ...
Active Flow Control For Reduction of Unsteady Stator-Rotor Interaction In a Turbofan Simulator
(Virginia Tech, 2000-10-10)
The research effort presented in this dissertation consists of employing active trailing edge blowing control to reduce the unsteady stator-rotor interaction in a turbofan simulator. Two active flow control systems ...
Analysis and Characterization of Fiber Nonlinearities with Deterministic and Stochastic Signal Sources
(Virginia Tech, 2000-02-10)
In this dissertation, various analytical models to characterize fiber nonlinearities have been applied, and the ranges of validity of the models are determined by comparing with numerical results.
First, the perturbation ...
Preparation, Separation, Characterization and Hydrogenation of Endohedral Metallofullerenes
(Virginia Tech, 2009-12-10)
Endohedral metallofullerenes (EMFs) have attracted increasing attention during past decades due to their novel structures and potential applications in a variety of fields such as biomedical applications and molecular ...
Investigation of Inlet Guide Vane Wakes in a F109 Turbofan Engine with and without Flow Control
(Virginia Tech, 2000-08-17)
A series of experiments were conducted in a F109 turbofan engine to investigate the unsteady wake profiles of an Inlet Guide Vane (IGV) at a typical spacing to the downstream fan at subsonic and transonic relative blade ...
Gender Differences in Computer Attitudes, Interests, and Usage in an Elite High School
(Virginia Tech, 2000-06-01)
A descriptive case study examined the gender differences concerning computer technology (IT) by a convenience sample (N = 180, 76%) of 11 th and 12 th graders at an elite public high school, recently named the "second best ...
Structural Identification and Buffet Alleviation of Twin-Tailed Fighter Aircraft
(Virginia Tech, 2000-03-30)
We tackle the problem of identifying the structural dynamics of the twin tails of the F-15 fighter plane. The objective is to first investigate and identify the different possible attractors that coexist for the same ...
Systematic Optimization Technique for MESFET Modeling
(Virginia Tech, 2000-07-24)
Accurate small and large-signal models of metal-semiconductor field effect transistor (MESFET) devices are essential in all modern microwave and millimeter wave applications. Those models are used for robust designs and ...