Digital Commons Network^™

A Microprocessor-Based Multivariable Interactive Control System, Sayed Mehdi Khayam-Nekouei

Electronic Theses & Dissertations

This study outlines the various types of control systems and reviews the necessary mathematical techniques to solve the problem of multivariable interactive control. The characteristics as well as the state representation for control processes involving either p or v type canonical structures are discussed. Next, the characteristics of multivariable interactive discrete control systems are discussed in detail. The advantages of flexibility and speed of microprocessors are used as powerful tools to implement a microprocessor-based system can be employed to control discrete processes. To demonstrate a practical application of a microprocessor-based system in a multivariable interactive discrete process, the algorithm and …

A Proposed C Language Binding For The Graphical Kernel System 3-D, M. G. Bolten, C. Y. Ho

Computer Science Technical Reports

This thesis introduces a proposed C language binding definition for the International standards Organization's draft international standard of the Graphical Kernel System-JD. This work augments the earlier C language binding of the two-dimensional version of the Graphical Kernel System commonly known as GKS. The proposed function interface will provide a basis for, if not a final, C language binding for the three-dimensional version of the Graphical Kernel System.

Robust Set Operations On Polyhedral Solids, Christoph M. Hoffmann, John E. Hopcroft, Michael S. Karasick

Department of Computer Science Technical Reports

No abstract provided.

An Evaluation Of The Effectiveness Of Adaptive Histogram Equalization For Contrast Enhancement, John B. Zimmerman, Stephen M. Pizer, Edward V. Staab, J. Randolph Perry, William Mccartney, Bradley C. Brenton

All Computer Science and Engineering Research

Adaptive Histogram Equalization (AHE), a method of contrast enhancement which is sensitive to local spatial information in an image, has been proposed as a solution to the problem of the inability of ordinary display devices to depict the full dynamic intensity range in some medical images. This method is automatic, reproducible, and simultaneously displays most of the information contained in the grey-scale contrast of the image. However, it has not been known whether the use of AHE causes the loss of diagnostic information relative to the commonly-used method intensity windowing. In the current work, AHE and intensity windowing are compared …

Decoding Of Dbec-Tbed Reed-Solomon Codes, Robert H. Deng, Daniel J. Jr. Costello

Research Collection School Of Computing and Information Systems

A problem in designing semiconductor memories is to provide some measure of error control without requiring excessive coding overhead or decoding time. In LSI and VLSI technology, memories are often organized on a multiple bit (or byte) per chip basis. For example, some 256K bit DRAM's are organized in 32K ?? 8 bit-bytes. Byte-oriented codes such as Reed-Solomon (RS) codes can provide efficient low overhead error control for such memories. However, the standard iterative algorithm for decoding RS codes is too slow for these applications. In this correspondence we present a special decoding technique for double-byte-error-correcting (DBEC), triple-byte-error-detecting (TBED) RS …

Load And Communications Balancing On Multiprocessor Logic Simulation Engines, Ken Wong, Mark A. Franklin

All Computer Science and Engineering Research

The problem considered in this paper is to find an assignment of logic components to processors which will achieve logic simulation speed-ups approaching the ideal for large processor populations. This problem becomes particularly important when a significant portion of the speed-up expected from logic simulation engines is attributed to load sharing (as opposed to obtaining speed-up by employing specialized hardware to carry out specific tasks associated with the simulation process such as event queue manipulation or function evaluation). Our research considers this problem for a particular multiprocessor simulation architecture for which a performance model has bene developed. The model is …

On-Line Sea Beam Acoustic Imaging, Christian De Moustier, F V. Pavlicek

Center for Coastal and Ocean Mapping

This paper describes a system designed and built at the Marine Physical Laboratory of the Scripps Institution of Oceanography to produce acoustic images of the seafloor on-line with a Sea Beammultibeam echo-sounder. This system uses a stand alone interface between the Sea Beam system and a grey-scale line-scan recorder. The interface is built around a Motorola 68000 microprocessor and has digitizing capabilities. It digitizes the detected echo signals from each of the 16 preformed beams inside the Sea Beam echo processor as well as the roll information given by the ship's vertical reference. Theacoustic data are then roll compensated and …

Model Of Hot-Film Sensor With Substrate Effects, David Mcalpine Judge

Electrical & Computer Engineering Theses & Dissertations

A detailed mathematical model is constructed to investigate the frequency response of a hot-film anemometer system. Since several diverse factors affect the frequency response, the analysis is broken down into three main parts. Each part is a detailed mathematical model. The first model consists of the ordinary differential equations which govern the electronics of the feedback system and heat transfer of the sensor. An important simplification in this model is that the rate of heat conduction from the sensor to its substrate is constant.

In the second model the unsteady state heat transfer properties of the substrate are examined by …

Mathematical Aspects Of Scientific Software, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

A Dynamic Majority Determination Algorithm For Reconfiguration Of Network Partitions, Bharat Bhargava, Peter Lei Ng

Department of Computer Science Technical Reports

No abstract provided.

Shells In An Interactive System, Balachander Krishnamurthy

Department of Computer Science Technical Reports

No abstract provided.

Supercomputing About Physical Objects, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

Transaction Network: A Parallel Computation Model Based On Consume/Produce Paradigm, Takayuki Dan Kimura

All Computer Science and Engineering Research

This report introduces a new parallel computation model that is suitable for pursuit of large scale concurrency. Our goal is to develop a semantically clean paradigm for distributed computation with fine-grained parallelism. Our approach is to demote the notion of process as the key concept in organizing large scale parallel computation. We promote, instead, the notion of transaction, an anonymous atomic action void of internal state, as the basic element of computation. We propose to organize a computation as a network, called a transaction net, of databases connected by transactions. A transaction, when it is fired, consumes data objects from …

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 …

Independent Checkpointing And Concurrent Rollback For Recovery In Distributed System—An Optimistic Approach, Bharat Bhargava, Shy-Renn Lian

Department of Computer Science Technical Reports

No abstract provided.

A Study Of Automated Reasoning In A Brain Tumor Diagnosis Expert System, Aung Zaw Maung

Masters Theses

The objective of this study is to survey various theorem-proving methods and to evaluate how these methods can be applied as inference engines in a brain tumor diagnosis expert system.

Various applications of automated reasoning based on the resolution principle are discussed. Knowledge representations and inference mechanisms used in expert systems are also surveyed.

An actual application of this method for a medical diagnosis problem is implemented and explained, and the limitations of this approach and possible future enhancements are discussed.

Power Series Solution To A Simple Pendulum With Oscillating Support, Mohammad Dadfar, James Geer

Computer Science Faculty Publications

The problem of determining some of the effects of a small forcing term on a regular perturbation solution to a nonlinear oscillation problem is studied via a simple example. In particular, we investigate the periodic solution of a simple pendulum with an oscillating support. A power series solution is constructed in terms of c-=( )2 L,where w0 and w are the natural and driving frequencies respectively, a is the amplitude of the support oscillation, and L is the length of the pendulum. These solutions are analyzed for three cases: above resonance (w > wo), below resonance (w < wo), and at resonance (w = wo). In each case, the approximate location of the nearest singularities which limit the convergence of the power series are obtained by using Pad6 approximants. Using this information, a new expansion parameter 6 is introduced, where the radius of convergence of the transformed series is greater than the original series. The effects of primary and higher order resonances on the convergence of the series solution is noted and discussed.

Computing About Physical Objects, Chanderjit Bajaj, Christoph M. Hoffmann, Elias N. Houstis, John T. Korb, John R. Rice

Department of Computer Science Technical Reports

No abstract provided.

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 …

An Expert System Controlling An Adaptable Distributed Data Base System, Bharat Bhargava, John Riedl, Detlef M. Weber

Department of Computer Science Technical Reports

No abstract provided.

Concurrent Checkpointing And Recovery In Distributed Systems, Pei-Jyun Leu, Bharat Bhargava

Department of Computer Science Technical Reports

No abstract provided.

The Evolution Of Text Formatting Languages, Dirk Herr-Hoyman

Masters Theses

Text, as seen in books and magazines, can take on three forms: string, graphic (two-dimensional), and image (digitized pictures). Text formatting processes text into a representation suitable for printing. Since a printer is really a computer, this representation is machine code for the printer. ASCII is one such code.

Six historically significant text formatting languages are surveyed: Runoff, Troff, TeX, Bravo, Scribe, and Postscript. The emphasis is on the text types available and the code generated. The main evolutionary forces are the changes in printers. Comparisons are made with programming languages.

Each of the six languages has ASCII as its …

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 Case (Common Application Service Element) And Application Interface For Manufacturing Automation Protocol, Amit Limaye

Theses

In 1980 General Motors formed a task force committee to explore solution to incompatibility of computer network on machine floor which control programmable devices, Robots etc. After receiving the various existing standards, the committee came up with first draft of Manufacturing & Automation Protocol (MAP 1.0) in April 1984. Further reviews resulted in different versions of MAP standards and presently, efforts are being made to come up with MAP 3.0.

MAP enables information to be readily transferred between computers, people and equipment and thus truely interconnecting open systems. The ultimate goal of these efforts is to be able to produce …

A Model For Adaptable Concurrency Control, Bharat Bhargava, John Riedl

Department of Computer Science Technical Reports

No abstract provided.

A Face Area Evaluation Algorithm For Solids In Csg Representation, Muh-Cherng Wu, Chanderjit Bajaj, C. R. Liu

Department of Computer Science Technical Reports

No abstract provided.

Ethernet Performance: Design And Implementation Study, Michael M. Chaney, Tachen L. Lo, Daniel C. St. Clair

Computer Science Technical Reports

General concepts concerning local area network designs, functions and topologies will be presented. Ethernet as a multipoint bus topology local area network will be presented in detail. The Carrier Sense Multiple Access/Collision Detect (CSMA/CD) method of fairly regulating access to the shared network bus is studied. The Ethernet Network in relation to the Open Systems Interconnect (OSI) is reviewed, but only the layers pertaining to Ethernet are discussed throughout the majority of the paper. The specifications as described by Xerox, Digital and Intel are presented to help the designer understand the network's physical limitations. Analytical models are used to predict …

A Representation For Serial Robotic Tasks, Barry Ross Fox, Arlan R. Dekock

Computer Science Technical Reports

The representation for serial robotic tasks proposed in this thesis is a language of temporal constraints derived directly from a model of the space of serial plans. It was specifically designed to encompass problems that include disjunctive ordering constraints. This guarantees that the proposed language can completely and, to a certain extent, compactly represent all possible serial robotic tasks. The generality of this language carries a penalty. The proposed language of temporal constraints is NP-Complete. Specific methods have been demonstrated for normalizing constraints posed in this language in order to make subsequent sequencing and analysis more tractable. Using this language, …

Program Development For Computer Simulation And Analysis For Multiplex Chromatography, Barbara Pawliszyn

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

In this report, the programs developed for the analysis of simulated data in multiplex chromatography are written in the ASYST language. The integration of the program modules into a menu-driven, user-friendly prototype program is outlined. The program is developed to allow for flexibility and easy upgrading of the code.

This report examines the calculation procedures potentially useful in multiplex chromatography. Analysis of the mutliplex chromatograms is done by three mathematical methods, Cross-Correlation, Hadamard Transform and Fast Fourier Transform. The effects of experimental length/chromatogram length and decision sequences on correlation noise present in a single chromatogram, are discussed. As the number …

A Comparison Of Two Evidential Reasoning Schemes, Sunny Lee

Department of Computer Science Technical Reports

No abstract provided.