Typescript (photocopy). / Digitized by Kansas Correctional Industries

First, the concepts of reflection coefficients, s-parameters, Smith chart, noise figure, and available power gain will be introduced. This lays out the foundation for the presentation of techniques on measuring noise figure and gain of high speed bipolar junction transistors. Noise sources in a bipolar junction transistor and an equivalent circuit including these noise sources will be presented. The process of determining the noise parameters of a transistor will also be discussed. A Pascal program and several TEKSPICE scripts are developed to calculate the stability, available power gain, and noise figure circles. Finally, these circles are plotted on a Smith chart to give a clear view of how a transistor will perform due to a change in source impedances.

Better methods for teaching computer science are needed. While no clear winner emerges in studies on the effectiveness of teaching media, the use of several media can be mutually reinforcing. Methods available to computer science teachers include lecturing, giving projector demonstrations, conducting hands-on sessions, monitoring independent study, and making a teaching machine available for group or individual use.A main strength of the teaching machine is its furnishing immediate feedback as students answer its quizzes. Teaching machines can assist in the major components of instruction: presenting information, guiding students, providing practice, and assessing student learning. They may take the form of tutorials, drills, simulations, or games. Good tutorials include directions, presentation frames, quizzes, assessment of student responses (with hints following mistakes), and facility to branch to different parts of the machine. A teaching machine's usefulness may be validated by comparing pre-test and post-test scores, by tracking student performance, and by field observation. Machines may be used solo or as a supplement and used with a whole class or as a means for bright students to forge ahead or slow students to catch up. / Department of Computer Science

The Monte Carlo-type statistical ray-tracing method was used to investigate the performance of the line-focusing Fresnel mirror solar concentrator. An optical model of the line-focusing Fresnel mirror concentrator using the statistical ray-tracing approach was developed. Many rays of sunlight from the solar disk were selected at random and traced through the concentrator in this model. This optical model permits calculation of the local and geometric concentration ratios. The latter requires an energyloss analysis. Small sun-tracking errors of the diurnal or transverse type were included in the model.Based on the optical model and the Monte Carlo-type statistical ray-tracing method, a computer program was written implementing the model and computations using Pascal. To facilitate performance comparisons, a baseline concentrator design was adopted. To study the effects of imperfect tracking, performance data were generated for small tracking errors up to approximately two and one-half degrees. The selected mirror configuration permitted comparisons between the statistical approach and previous applications of the "extreme ray" analysis for an imperfectly tracking mirror concentrator.Simulation results demonstrated that the concentration characteristics are highly sensitive to the tracking error. The geometric concentration ratio dramatically decreases when the tracking error increases, which is the same as the "extreme ray" analysis. Results of some typical numerical calculations are presented graphically and discussed. / Department of Physics and Astronomy

Thesis (Ph.D.) - University of Glasgow, 2007. / Ph.D. thesis submitted to the Department of Computing Science, Faculty of Information and Mathematical Sciences, University of Glasgow, 2007. Includes bibliographical references. Print version also available.

Thesis (Ph. D.)--University of Washington, 1981. / Vita. Bibliography: leaves [173]-177.

published_or_final_version / Education / Master / Master of Education

published_or_final_version / Education / Master / Master of Education