Digital Commons Network^™

Advanced Communications Systems, Jonathan S. Turner

All Computer Science and Engineering Research

The Advanced Communication Systems Project is concerned with new communication technologies that can support a wide range of different communication applications in the context of large public networks. Communications networks in common use today have been tailored to specific applications and while they perform their assigned functions well, they are difficult to adapt to new uses. There currently are no general purpose networks, rather there are telephone networks, low-speed data networks and cable television networks. As new communications applications proliferate, it becomes clear that in the long term, a more flexible communications infrastructure will be needed. The Integrated Services Digital …

Software Tools For Performance Evaluation Of Concurrent Processing, Rodrogo A. Obando

Electrical & Computer Engineering Theses & Dissertations

The development and use of software tools for performance evaluation of concurrent processing is presented in this thesis. The particular concurrent processing architecture proposed by Stoughton and Mielke is investigated. The modelling of this architecture is based on Petri net theory and it can be studied making use of circuit theory. Computation of lower bounds for Time Between Outputs (TBO) and Time Between Input and Output (TBIO) can be accomplished by using principles of circuit theory, among others. This new modelling needs to be deeply evaluated and studied. This evaluation and study is accomplished with the tools developed and presented …

Prodb: An Experimental Generalized Database System User's Manual, Guillermo R. Simari

All Computer Science and Engineering Research

The following notes document in a succinct manner the use of the system PRODB. The system is still evolving and several new features are in the process of being added. PRODB is a prototype system that is being used as an exploration vehicle of the possible extensions to the relational model through logic programming. The system consists of a relational database system having a relational algebra type language as a query language. It is written in Prolog and it extends the capabilities of Prolog predicates with the relational algebra operators for handling the database structure. The database system currently provides …

Implementation Of Inversion Algorithms In Reconfigurable Systolic Arrays, Haritini E. Andre

Retrospective Theses and Dissertations

Reducing the computing time of the matrix inversion has been a concern of many authors. The use of Systolic architectures containing orthogonally connected processing elements capable of few instructions multiple data have allowed for new algorithms to be implemented. Two algorithms are examined that rely on the triangularization methods for matrix inversion. One can be applied to the general non-singular matrix and the other to the symmetric matrix. The throughput in both implementation is revolutionized. The speed improvement over Liu and Young’s implementation of the symmetric matrix inversion is by a factor of three.

The throughput in both implementation is …

The Design Of A Processing Element For The Systolic Array Implementation Of A Kalman Filter, John P. Condorodis

Retrospective Theses and Dissertations

The Kalman filter is an important component of optimal estimation theory. It has applications in a wide range of high performance control systems including navigational, fire control, and targeting systems. The Kalman filter, however, has not been utilized to its full potential due to the limitations of its inherent computational intensiveness which requires "off-line" processing or allows only low bandwidth real-time applications.

The recent advances in VLSI circuit technology have created the opportunity to design algorithms and data structures for direct implementation in integrated circuits. A systolic architecture is a concept which allows the construction of massively parallel systems in …

Belief Maintenance Systems: Initial Prototype Specification, Roseanne M. Fulcomer, William E. Ball, John P. Tadlock

All Computer Science and Engineering Research

A fundamental need in future information systems is an effective method of accurately representing and monitoring dynamic, real-world situations inside a computer. Information is represented using an Extended Open World Assumption (EOWA), in which the data are explicitly true or false. Reasoning within the EOWA is done through the use of a dynamic dependency net which only represents those beliefs and justifications that are both currently valid and in current use. In this paper, we present definitions and uses of the EOWA and dynamic dependency net in our current research of developing a database with which we can use deductive …

Master Of Science In Computer-Based Learning 1987-89 Catalog, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

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

College of Engineering and Computing Course Catalogs

No abstract provided.

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

College of Engineering and Computing Course Catalogs

No abstract provided.

Center For Computer-Based Learning Doctor Of Arts In Information Systems, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Memorandum Re: Microcomputer Applications In Education Program, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Computer-Based Graduate Programs In Computer Education 1987-88 Catalog, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctor Of Arts In Training And Learning 1987-89 Catalog, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctor Of Arts In Information Systems 1987-89 Catalog, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Implementation Of A Parallel Ynet Architecture, Julie Nadeau Leblanc

Retrospective Theses and Dissertations

A simulation of an alternate implementation of a redundant busing network based on the Teradata Ynet architecture is presented. An overview of the Teradata DBC/1012 data base parallel processing computer including the Ynet, an active logic busing network, is given. Other multiprocessor busing networks are examined and compared to the standard Ynet and the alternate Ynet.

In the standard Ynet system, two networks, called Ynets, process message packets concurrently. When one of the Ynet paths fails, the system is reset. The remaining Ynet path restarts using the previously interrupted packets and processing continues without the aid of the failed Ynet. …

Impact Of Automation On Process Control Decision-Making, Steven M. Miller, Susan R. Bereiter

Research Collection School Of Computing and Information Systems

This paper investigates changes in the process control of a vehicle assembly plant which had been modernized from a principally manual procedure to one that uses programmable automation extensively. Process control is defined as the information flow and decision-making required to perform basic process operations. We investigate the effects of implementing a computer-integrated production system on the amount and types of process control decision-making and on the distribution of process control decision-making between humans and machines. After automation, the emphasis on decisions regarding product quality specifications increased and the emphasis on decisions related to flexibility in handling a variety of …

Compiling Unit Clauses For The Warren Abstract Machine, George D. Herbert

UNF Graduate Theses and Dissertations

This thesis describes the design, development, and installation of a computer program which compiles unit clauses generated in a Prolog-based environment at Argonne National Laboratories into Warren Abstract Machine (WAM) code. The program enhances the capabilities of the environment by providing rapid unification and subsumption tests for the very significant class of unit clauses. This should improve performance substantially for large programs that generate and use many unit clauses.

A Unified Approach To Mixed-Mode Simulation, Roger D. Chamberlain, Mark A. Franklin

All Computer Science and Engineering Research

This paper presents a unified approach to mixed-mode simulation. It investigates the algorithms for both logic and circuit simulation, considering their similarities and differences, and a general framework is presented for integrating the two algorithms in uniform manner. The time advance mechanisms and component functional evaluations of the algorithms are show to be similar in nature, and mechanisms for the translation of information represented uniquely in the two algorithms are given. The resulting integrated algorithms is capable of performing mixed-mode simulation, where a circuit is partitioned into discrete and continuous regions, and each region is simulated at the appropriate level. …

The Virtual Classroom: Building The Foundations, Computerized Conferencing & Communications Center, Starr Roxanne Hiltz

Computerized Conferencing and Communications Center Reports

This is a report on the first year of a three-year project concerned with the development and assessment of new types of software capabilities designed to support university level courses. A "virtual classroom" or "university without walls" is being created within a computerized conferencing system. During the first year of the project, students in twelve courses at three universities completed part or all of their coursework online. Pre and post-course questionnaires and automatic monitoring of their computer-mediated communications are the main sources of data. Independent variables include the expectations and attributes of the individual students; characteristics of the particular hardware …

Centre For Computer Aided Management: An Overview, V B Kaujalagi

IIMB Management Review

No abstract provided.

A Compiler For A Two-Dimensional Programming Language, Julie Wing Kam Choi

All Computer Science and Engineering Research

A visual programming language is presented. This language uses interactive graphics to convey notion such as subroutine, recursion, block structure, parallel and serial processing to school children. Currently the system is interpreter based. To overcome the inefficiency of the interpreter based system, a compiler is implemented for this language. This report gives an overview of the compiler and the details about the parser, semantic analyzer and the code generator. Finally, a performance comparison between the interpreter based system and the compiler based system is given.

Progressive Coding And Transmission Of Digital Diagnostic Pictures, Sharaf E. Elnahas, Kou-Hu Tsou, Jerome R. Cox, Rexford L. Hill, R. Gilbert Jost

All Computer Science and Engineering Research

In radiology, as a result if the increased utilization of digital imaging modalities, such as computed tomography (CT) and magnetic resonance imaging (MRI), over a third of the images produced in a typical radiology department are currently in digital form, and this percentage is steadily increasing, Image compression provides a means for the economical storage and efficient transmission of these diagnostic pictures. The level of coding distortion than can be accepted for clinical diagnosis purposes is not yet well-defined. In this paper we introduce some constraints on the design of existing transform codes in order to achieve progressive image transmission …

Design And Applications Of A Graphics Package For The Hp1000 Computer., Hsiao-Chih George Lee

Electronic Theses and Dissertations

The objective of this thesis is to develop the FORTRAN subroutine PLOTER which is a general-purpose plotting tool to plot charts on a Hewlett Packard plotter. The programs RESP and INVLAP which can plot the frequency and time responses of system functions are modified to adopt the PLOTER subroutine and are stored of the HP1000-A900 minicomputer whose software, the GRAPHICS/1000, supports the graphics ability of PLOTER. This thesis describes the theories, functions, software techniques and operations of the PLOTER subroutine and the application programs RESP and the INVLAP. It also provides program listings and example plots.

Deterministic Linear Predictors For Bit Rate Improvement, Dhanvant H. Goradia

Electrical & Computer Engineering Theses & Dissertations

This thesis addresses the application of deterministic linear predictor s for telemetry based systems. Deterministic linear predictors are considered as a viable alternative to block transform coding in order to achieve bit rate reduction. A method of calculating the predictor coefficients of a deterministic linear predictor is presented. The system model is developed parametrically with respect to the bandwidth, polynomial order, signal class and predictor length. Two classes of signals, deterministic and random are analyzed and bounds on the performance of the deterministic linear predictor are established. A family of six pole Butterworth filters are used as presample filters in …

Show And Tell User's Manual, Peter Mclain, Takayuki Dan Kimura

All Computer Science and Engineering Research

The purpose of this report is to introduce essential features of the Show and Tell Language system to those computer users who are already familiar with some high-level programming language such as FORTRAN, BASIC or PASCAL. This manual is not intended for school children. Some familiarity with the Macintosh user interface and the MacPaint application program is assumed. It is also assumed that the Show and Tell application program disk and the Sample program are available to the reader. The basic programming concepts in Show and Tell are introduced in Chapter Three. The reader may find it easer to start …

A Systolic Parsing Algorithm For A Visual Programming Language, Adam W. Bojanczyk, Takayuki Dan Kimura

All Computer Science and Engineering Research

In this paper we consider a problem of parsing a two-dimensional visual programming language Show and Tell on a two-dimensional array of processors. A program in Show and Tell is a bit-mapped, two-dimensional pattern satisfying a certain set of grammatical rules. The pattern consists of partially ordered set of rectilinear boxes and arrows distributed over the space of nxn pixel area. The corresponding directed graph, the box graph, where boxes are nodes and arrows are directed edges, may not have a cycle in a Show and Tell program. The cycle detection is the most computationally intensive stage of the parsing …

Moderating Online Conferences, Revised Manuscript, Computerized Conferencing & Communications Center, Elaine B. Kerr

Computerized Conferencing and Communications Center Reports

While considerable lore has accumulated about effective leadership techniques for groups interacting electronically, until now it has not been systematically presented. This material is culled from the experiences of those who have moderated past online conferences, the knowledge common to the EIES User Consultants, and observed behavior from thousands of conferences convened on EIES in the past. While this is a system-specific guide, the general principles ought to be generalizable to other systems, with different structures for group discussion.

Robert Burns put it well:
The best laid schemes o' mice and men
Gang aft a-gley;
An' lea'e us nought but …

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.