Thesis (Ph. D.)--University of Tampere, 1999. / Description based on contents viewed Apr. 19, 2007; title from title screen. Includes bibliographical references (p. 58-67).

Thesis (Ph.D.)--University of Delaware, 2006. / Principal faculty advisor: Lori L. Pollock, Dept. of Computer & Info Sciences. Includes bibliographical references.

Thesis (Ph.D.)--McMaster University, 2005. / Supervisor: Brian Detlor. Includes bibliographical references (leaves 234-272). Also available online.

Thesis (Ph. D.)--University of Hong Kong, 2006. / Title proper from title frame. Also available in printed format.

Thesis (M.S.)--University of Montana, 2007. / Title from title screen. Description based on contents viewed Mar. 14, 2007. Includes bibliographical references (p. 84).

A new version of a Computer Aided Teaching System, CATSY-3, was created in order to allow greater flexibility and efficiency than older versions of CATSY. In the implementation of CATSY-3, the menu was transferred from the screen to the data tablet. In the process, the control structure of CATSY was rewritten to allow complete freedom of movement from one menu option to any another.A keyboard input feature (KEYIN) is also included in CATSY-3 in order to allow a more rapid mode of menu selection and to allow the option of precision coordinate input. Additional menu options are included in CATSY-3, namely, COPY, MOVE, REFRESH_OBJECT, interactive COLOR change, automatic set-up for input devices, among others.The history and description of various electronic chalkboard` implementations are also presented in this thesis.

A new and improved stabilizer was developed for the variable speed generation (VSG) system. The VSG system exhibits periodic oscillations which sometimes leads to a loss of synchronism. After careful study, a simple but effective strategy to stabilize the system was implemented with real time digital feedback control. The VSG system consists of an engine, which is the prime mover, driving a doubly fed machine (DFM), which is the generator. The stator of the DFM is directly connected to the grid while the rotor is connected to the grid through a power electronic converter. The converter used in this study is a series resonance converter (SRC), but the proposed method may also be applied to other kinds of converters. The stabilizer senses the RPM of the engine, the feedback signal, and controls the rotor current amplitude and frequency of the doubly fed machine. Control was implemented using the 80C196KB microcontroller. The software consists of a mix of "C" and assembly language. Speed being an important factor in the implementation, care was taken to minimize the control loop times. The important features of the hardware and software developed for the stabilizer are: (1) 12 MHz controller board (2) Real time digital band pass filter (3) Instantaneous rotor speed measurement (4) Interrupt driven measurement and control loops (5) User defined setup parameters (6) IBM PC based real time serial communication The performance of the VSG system was studied with and without the stabilizer. A significant improvement in the stability of the system was noticed over the entire region of operation. / Graduation date: 1991

A new hardware system for the ECE 4550 Control System Design lab is proposed. The current hardware is examined and its shortcomings are documented. Design guidelines for the new system are put forth and interfaces between hardware elements are defined. Four hardware elements are developed: a motherboard, an I/O daughtercard, a DC motor driver daughtercard, and an AC motor driver daughtercard. Each of these systems is examined in depth from a design decision standpoint as well as from the standpoint of the design guidelines promulgated earlier. Technical limitations for each system are disclosed and examined in detail.

Univ., Diss.--Saarbrücken, 2006.

Techn. Univ., Diss.--Chemnitz.