Computer Engineering Commons^™

A Study Of The Dynamic Control Of The Inverted Pendulum System, Koon T. Ang

Retrospective Theses and Dissertations

This report describes the simulation of an inverted pendulum control system. The purpose is to provide an interesting learning process through high resolution color graphics animations in the control of dynamic systems. The software uses the graphic capabilities extensively to make it very user-friendly and highly interactive. A numerical analysis method is used to solve the systems of equations. The animation driven by the results is then displayed on the video terminal. Facilities range from selection of controllers, changing of system parameters, plotting graphs, and hardcopy outputs.

Root Locus Plotter For A Dual Tank System Under Feedback Control, John M. Decatrel

Retrospective Theses and Dissertations

A root locus graphics routine was written in Turbo Pascal for the analysis and design of a linearized dual tank control system. The routine is a subprogram to be incorporated with an editor written by L. Fadden. This editor allows for the saving and changing of parameters to the system.

The dual tank system is a good example for classical feedback control analysis. A brief description of the process and system is presented. The system may be described by linearized differential and algebraic equations. From these, a characteristic equation is derived, which gives rise to the root locus. The root …

Control Of A Nonlinear System By Linearization, Drew D. Nelson

Retrospective Theses and Dissertations

In today’s linear control systems, exact solutions can be obtained by the use of Laplace Transforms in the frequency domain. In dealing with nonlinear systems, exact solutions are not always achievable. For this reason, it is necessary to linearize the system and then apply frequency response methods.

This paper shows the comparison of a nonlinear system with the linearized model of the same system. For both proportional and proportional-integral control, the response to a unit step change in the set point showed minimal difference between the linearized and nonlinear system.

Lsim User Manual, Roger D. Chamberlain

All Computer Science and Engineering Research

Lsim is a gate/switch level digital logic similar. It enables users to model digital circuits both at the gate and switch level and incorporates features that support investigation of the simulation task itself. This user's manual describes the procedures used to specify a circuit to lsim and control the simulation of the circuit (i.e., specifying inputs vectors, running the simulation, and monitoring output signals).

Investigation Of Electronic Holography Using Spice Computer Simulation Experiments, Monish Ranjan Chatterjee

Electrical and Computer Engineering Faculty Publications

Using SPICE experiments, it has been possible to verify most of the important aspects of electronic holography. The generation and properties of dynamic echoes under different types of nonlinearities have been extensively tested, and some new information has been garnered in the process. The case of pulse and generalized memory echoes has also been tested, and the results have been fairly satisfactory. Most of all, the simplicity with which the intriguing concept of memory echoes has translated into the circuit implementation on SPICE, and the closeness of the results to predicted behavior have been somewhat of a pleasant surprise.

Since …

Computerised Selection Of Materials And Reliability, Nabil Ibrahim Mikhail

Archived Theses and Dissertations

No abstract provided.

Integrating Working At Home With Information Systems Management, Computerized Conferencing & Communications Center, Joseph C. Schuh

Computerized Conferencing and Communications Center Reports

The history of computerization has its origin in the automation of manual processes - searching out the segments that could be put on a computer. The intended result was that the entire job would be done faster and cheaper. Thus, current computer-based information systems tend to make more efficient use of computers than people. The management function, on the other hand, often seems to focus on competitive skills and salesmanship rather than on the ability to attract and hold talented people. But, such impersonal factors that have driven management practices are changing. There has been a complete reversal in the …

Statistics On Logic Simulation, K. F. Wong, Mark A. Franklin, Roger D. Chamberlain, B. L. Shing

All Computer Science and Engineering Research

The high costs associated with logic simulation of large VLSI based systems have led to the need for new computer architectures tailored to the simulation task. Such architecture have the potential for significant speedups over standard software based logic simulators. Several commercial simulation engines have been produced to satisfy need in this area. To properly explore the space of alternative simulation architectures, data is required on the simulation process itself. This paper presents a framework for such data gathering activity by first examining possible sources of speedup in the logic simulation task, examining the sort of data needed in the …

An Investigation To Improve Linear Predictive Vocoder Pulse/Noise Excitation Models, Elizabeth Annella Martina Effer

Electrical & Computer Engineering Theses & Dissertations

The quality of synthetic speech from Linear Predictive (LP) vocoders is known to be degraded due to the lack of detail in the commonly used pulse/noise excitation model. In this investigation, it was hypothesized that this degradation is due to the lack of precise timing information in the pulses and to the constraint that each short-time segment of excitation be either an impulse train or white noise. Accordingly, more complex excitation models were implemented using precise timing from peaks in the residual and a mixture of pulses and noise. Since the LP residual is known to be the perfect excitation …

Randomized Routing On Fat-Trees, Ronald I. Greenberg

Computer Science: Faculty Publications and Other Works

Fat-trees are a class of routing networks for hardware-efficient parallel computation. This paper presents a randomized algorithm for routing messages on a fat-tree. The quality of the algorithm is measured in terms of the load factor of a set of messages to be routed, which is a lower bound on the time required to deliver the messages. We show that if a set of messages has load factor lambda on a fat-tree with n processors, the number of delivery cycles (routing attempts) that the algorithm requires is O(lambda+lgnlglgn) with probability 1-O(1/ …

Design Of A Modulation System Simulator, Vincent Carl Dale

Computational Modeling & Simulation Engineering Theses & Dissertations

The development of a Modulation System Simulator is described. The Modulation System Simulator is used to investigate the performance, in the presence of noise, of various analog and digital modulation systems. The methods of modulation studied using this simulator are amplitude modulation, frequency modulation, pulse amplitude modulation, pulse code modulation, amplitude shift keying modulation, and frequency shift keying modulation. For each of these modulation systems a mathematical model is devised and then analyzed to predict the performance of each modulation system in the presence of noise. The results of this theoretical analysis are then compared with the experimental results obtained …

Determinants Of Acceptance Of Computer Mediated Communication System, Computerized Conferencing & Communications Center, Starr Roxanne Hiltz, Elaine B. Kerr, Kenneth Johnson, Murray Turoff

Computerized Conferencing and Communications Center Reports

Acceptance of Computer-Mediated communication Systems (CMCS) by managers and professionals corresponds to its incorporation into their daily patterns of communication and work. Acceptance includes at least three inter-related dimensions: amount of use, subjective satisfaction with the process of using the system, and a perception that system use has positive impacts upon productivity.

Pre-use and follow-up questionnaires were distributed to 150- 250 new users of four different CMCS. Three are conferencing systems, designed to support "group work." They differ in terms of comprehensiveness or complexity of design, and size and nature of the user communities; COM/KOM, a Swedish system with mostly …

Australian Co-Operation With The National Agricultural Research Project Thailand Computing Needs For The Thai Department Of Agriculture, Colin Edwards

All other publications

No abstract provided.

An Inventory Of Maine's Telecommunications System, Maine State Planning Office

Maine Collection

An Inventory of Maine's Telecommunications System

Prepared for the Maine State Planning Office by Joseph M. Chaisson and Valerie Lamont of the Telecommunications Research Program at Westbrook College in Portland, Maine. July, 1985.

"The Primary purpose of this report is to provide information for Governor Brennan's Task Force on Telecommunications. The inventory also can be widely used as a reference by persons and organizations concerned with providing telecommunications services in Maine."

Contents: Introduction / Local Telephone Service / Mobile Telephone Service / Digital Termination Service / Cable Television / Paging Systems / Intra-State (Intra-LATA) Public Services / Intra-State (Intra-LATA) Private …

Center For Computer And Information Sciences Master Of Science In Computer Information Systems Summer Courses 1985, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Analog Computer Simulation With Automatic Scaling By Digital Computer, Mark Anthony Motter

Electrical & Computer Engineering Theses & Dissertations

A computer-aided design approach for the simplification of analog computer simulation is presented. The simulation configuration consists of an EAI 2000 analog computer with serial communications link to a PDP — 11/24 digital computer. Under control of the PDP-11, the analog simulations are realized with appropriate time and magnitude scaling which adjusts the range of the simulation coefficients and prevents overloads of the analog components. The analog computer hardware configuration accommodates both stable plants up to eighth order and closed-loop systems up to tenth order. Cascade compensation is provided for the closed-loop systems.

The plant may be described by either …

On The Probable Performance Of Graph Coloring Algorithms, Jonathan S. Turner

All Computer Science and Engineering Research

We define a natural probability distribution over the set of k-colorable graphs on n vertices and study the probable performance of several algorithms on graphs selected from this distribution. The main results are listed below. • We describe an algorithm to determine if a given n vertex graph is k-colorable, which runs in time O(n + m log k), where m is the number of edges. We show that this algorithm can successfully identify almost all random k-colorable graphs for constant or slowly growing values of k. • We show that an algorithm proposed by Brelas, and justified on experimental …

Computers And Robotics, Wayne Tinga

Pro Rege

No abstract provided.

Collecting Data About Logic Simulation, Roger D. Chamberlain, Mark A. Franklin

All Computer Science and Engineering Research

Design of high performance hardware and software based gate-switch level logic simulators requires knowledge about the logic simulation process itself. Unfortunately, little data is publically available concerning key aspects of this process. An example of this is the lack of published empirical measurements relating to the time distribution of events generated by such simulators. This paper presents a gate-switch level logic simulator lsim which is oriented towards the collection of data about the simulation process. The basic components of lsim are reviewed, and its relevant data gathering facilities are discussed. An example is presented which illustrates the use of lsim …

Center For Computer And Information Sciences Master Of Science In Computer Information Systems Spring Courses 1985, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Rivest-Shamir-Adelman Cryptosystem, Edward A. Fetzner

Theses & Honors Papers

Cryptography, the art of writing secret messages, has been practiced for almost 3000 years. Two people have a message to communicate to each other , with a chance of an outside person intercepting the message before it reaches the receiver . Therefore, the message must be put through an encryption scheme to keep the intervening person from finding the true nature of the message . An encryption scheme is coding a message using an enciphering key and then decoding the coded message with a deciphering key .

Mode Of Communication And The "Risky Shift" : A Controlled Experiment With Computerized Conferencing And Anonymity In A Large Corporation, Computerized Conferencing & Communications Center, Starr Roxanne Hiltz, Murray Turoff, Kenneth Johnson

Computerized Conferencing and Communications Center Reports

Peer groups of five managers in a large company with a well developed corporate culture engaged in choice dilemma tasks using three modes of communication: face-to-face, synchronous computerized conferences with regular names, and synchronous computerized conferences with assigned pen names. This is the final technical report on the experiment, including documentation of all procedures, and reports of the tests of all hypotheses, including those which were not supported.

Choice behavior varied by problem and mode of communication. On a problem related to a major decision on the future of the company, conservative choices and conservative shifts dominated. On two choice …

Study Of Mo, Au, And Ni Implanted Molybdenum Laser Mirrors By Spectroscopic Ellipsometry, Paul G. Snyder, George H. Bu-Abbud, Jae Oh, John A. Woollam, David Poker, D. E. Aspnes, David Ingram, Peter Pronko

Department of Electrical and Computer Engineering: Faculty Publications

The implantation of 150 kev molybdenum ions into polished molybdenum laser mirrors is found to increase the complex dielectric constant in the visible spectrum. Analysis using the Bruggeman effective medium approximation demonstrates that the increase is due to surface smoothing and that the surface is made nearly atomically smooth by a fluence of 5 x 10¹⁵ /cm². Implantation of Au at 1Mev caused considerable microscopic roughening, as well as a change in the bulk optical properties. 3 MeV Ni ion implantation caused only a slight surface roughening. A thin dielectric film (probably a hydrocarbon) is found to …

Center For Computer Based Learning Policies And Procedures Manual, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

The Doctor Of Education In Computer Education An Online Program For Professional Success, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctor Of Arts In Information Sciences Brochure 1985, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Center For Computer-Based Learning Doctor Of Arts In Information Science And In Training And Learning, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Master Of Science In Computer-Based Learning Overview, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctoral Degree In Computer Education, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctor Of Arts In Information Science 1985-86 Catalog, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.