Digital Commons Network^™

Mizer : A Ruled Based Cad Tool For Logic Optimization, Sandip Mukerjee

Theses

This objective of this research was to develop a knowledge based CAD tool, to address the problems of Logic Design. MIZER is an expert system, that accepts functional specifications of a logic circuit and connectivity description of its implementation to generate an optimal design. This information is then used to develop a hazard free circuit that brings about an optimization in area and timing. It stores the newly created design into its knowledge base with the approval of the designer, for future use.

Analysis Of An Inertial Navigation System On A Silicon Wafer, Ashok K. Parida

Theses

This thesis describes a self-contained inertial navigation system for commercial vehicles. It is low cost miniature system employing some of the newest techniques in micromechanical and microelectronic hardware.

The system employes an array of vibrating tuning fork gyros, a number of feedback force-balance accelerometers, and a central processing unit, all fabricated on a silicon wafer using integrated circuit fabrication technology. A miniature platform (size of a golf ball) driven by gearless torque motors is used to provide a quiet environment for the gyros and accelerometers. There are radio links between components that are on and off the platform (eliminating need …

Images Of My Mind, Mary Loomis Rickman

Theses

Not Included

The Computer As A Tool In The Ethical Development Of Primary School Children, Nancy B. Landau

Theses

When I first thought about my thesis topic at the end of last year, I had a very different concept from what eventually developed into this project. My original intention, that of using the computer as an educational tool in the ethical and social development of primary school children, has remained the same. The changes occurred in my methods of achieving this intention. My rationale for promoting the computer as an educational resource is manifold. For example, the world that these children will be entering as adults will be entirely computerized and automated. This next generation must have more than …

Computer Imagery And Creative Energy, Linda K. Saxton

Theses

During the creative process energy becomes manifest through some form, be it nature, people, thought, or object. Individuals can expreience and absorb this energy directly through awareness of the subtle energy body and by developing its inner technology or system of energy centers and channels for the purpose of revitalizing body and mind and for transforming consciousness. It was my intent in this thesis to develop a videotape that would extend knowledge about, provide an experience of, and be an expression of creativity as the flow and manifestation of higher creative energy, higher referring to levels of refinement, the highest …

Test Target Display, An M.F.A. Photography Portfolio As Applied To Optical Laser Disc, Ronald Joseph Gregory

Theses

By way of introduction, it seems appropriate to reflect upon my artistic endeavors prior to graduate study and how my interest in the use of high technology in art eventually led me to the production of "Test Target Display," a laser videodisk. After completing my BFA degree in studio art, I searched for employment in a related filed. As an undergraduate, I had developed a serious interest in photography and was very fortunate to be hired as a biomedical photographer at a teaching hospital. This position provided me with access to excellent darkroom facilities, as well as many scientific instruments …

A Performance Comparison Between A Wide-Hinged Endpaper Construction And The Library Binding Institute Standard Endpaper Construction, Claudia Chaback

Theses

For the last fifty years , library binders have employed a standard endpaper construction for all of its bindings. Now, because of new binding techniques and the deterioration of paper some preservationists have placed a demand on library binders to develop an alternate endpaper construction. The purpose of this study was to determine the hinge strength and openability performance of the two most conmon library binding techniques, oversewing and Singer side sewing, which were flat backed and rounded/backed in relation to the currently used the LBI Standard endpaper as compared to the wide-hinged endpaper construction. It was questioned if there …

A Survey Of Current Practices In Teaching Remedial Reading To Determine Congruence Of Opportunities For Reading Development, Ruth Hubbard Richardson

Theses

The purpose of this study was to determine current practices in providing opportunities for reading . development for remedial reading students in mid- Missouri schools, Callaway County, Hermann R-1, Montgomery County R-3, Warren County R-3, and Wellsville R-1, and to relate those practices to the attitudes of teachers responding to the survey. It was intended to elicit information regarding practices in remedial reading compared to classroom reading instruction, reading instruction compared to library usage, and reading instruction compared to language instruction. Responses were assessed to determine areas of congruence or closely related practices and to determine the effects of perceived …

Investigation Of The Accuracy Of Array Radiometry For Measuring Pulsed Radiation Sources, K.W. Farrell

Theses

Due to the recent advent of diode arrays and their subsequent use in radiometers, there has been some discussion about the accuracy of using diode array radiometry in the measurement of pulsed and flash sources. In order to determine whether or not diode array radiometers are accurate instruments for measuring these sources, a Tracor Northern TN-1710 radiometer, which uses a diode array, and a conventional, single channel Optronic 730A radiometer were used to measure three sources. These three sources consisted of a 45 watt tungsten-halogen lamp pulsed with an optical chopper.- a cathode ray tube (CRT) and a xenon flash. …

Mosaic In Paper, Caroline M. Howell

Theses

"Mosaic In Paper" is a synthesis of lithographs, photo etchings, and woodcuts designed on the Macintosh Plus computer then transferred to these processes through Xerox copies or laser print-offs. The concept of the piece stems from the Byzantine mosaics and Gothic rose windows I saw in Europe while living and studying in Italy four years ago, as well as a brief study of Oriental rugs while designing the work. The piece is intended to show harmony between the technology of today and the tradition of these ancient art mediums.

A Digital Indicator Diagram Generation System For The Ricardo E6 Engine, Peggy A. Faber

Theses

This paper explains and evaluates an indicator diagram generation system for a single cylinder, internal combustion, research engine. The apparatus is digital and consists of a piezo-electric pressure transducer with charge amplifier, a shaft encoder, a digital oscilloscope, and a computer with printer. Motoring data provides valuable information on the performance of the system which is used in the computer software to produce results accurate to 5.4 percent. Results include the indicator diagram itself, the work produced, the horsepower, and the indicated mean effective pressure. Included are an overview of indicator diagram theory, discussion of the apparatus, evaluation of the …

Psyxpert: An Expert System For Aiding Psychiatrists In The Diagnosis Of Psychotic Disorders, Mary A. Overby

Theses

Psyxpert is an expert computer system designed to aid psychiatrists in the diagnosis of mental disorders when psychotic features are the prominent part of the presenting clinical picture. The knowledge base contains psychiatric knowledge in the form of production rules. The system uses a backward-chaining control strategy to guide the consultation. Psyxpert provides a menu-driven user interface and an explanation subsystem. The system uses certainty and importance measures to produce a diagnosis with an attached certainty factor and recommendations for further evaluation or therapy. Psyxpert is written in Virginia Tech HC Prolog and runs on Digital Equipment Corporation's VAX 11/780 …

A Study Of The Brain's Transfer Function For Edge Perception, Charles G. Fink

Theses

A concept was developed and a computer program was designed and implemented to model the eye, the brain, and the perception system. These models were used to study edge transformation through the human visual system. The eye model was developed using optical spread and neural sampling data along with different inhibition distributions. The effects of lateral inhibition on retinal edge response were studied and hypothetical brain transfer functions were calculated. The results of this study indicate that no single mechanism or linear model can explain both the sinewave response and edge perception for the human visual system. The eye and …

A Finite Element Solution Of Thermal Wave Propagation In Elastic Media, Dominic N. Dalo

Theses

The rational theory of thermodynamics is used to develop equations governing the propagation of thermal waves. A new vector quantity is introduced to account for the thermal waves. The phenomenon of thermal wave propagation is illustrated by considering the problem of one-dimensional heat conduction in a finite slab subjected to a heat flux pulse. The solution is obtained via the finite element method. A discussion of the results and their significance is also presented.

An Expert System To Optimize Combinational Logic, Gu-Ching Lin

Theses

Twenty to fifty percent of the active area of most semicustom integrated circuits is devoted to combinational logic. Automating the synthesis and optimization of combinational circuitry can result in significant improvements in both the design cycle time and the overall area of the implementation. This thesis presents a rule-based system that optimizes combinational logic for a given technology. By performing Boolean function minimization, decomposition, logic synthesis and a series of local transformations4, the system achieves area reductions and saves valuable design time.

Mathematical Modelling Of The Simultaneous Diffusion Of Egta And Caegta And Ca2+ In A Two-Compartment System Representing Skinned Smooth Muscle, Roderick Jon Hausser

Theses

Smooth muscle strips "chemically skinned" with Triton X-100 represent a two-compartment system consisting of the extracellular space (ECS) and the cytosolic space (CS) bounded by the permeabilized plasma membrane. Free [Ca²⁺] in such systems must be controlled with sufficiently high concentrations of Ca-buffers (EGTA). The presence of Ca-buffers, however, will oppose and delay any changes in [Ca²⁺] in both compartments. We have developed a model describing the simultaneous diffusion of Ca 2+ , EGTA and CaEGTA between bath and ECS, and ECS and CS and the chemical reaction between ligand and metal species in each compartment. …

The Design And Fabrication Of Dielectric Waveguides For Use With High Power Carbon Dioxide Lasers At 10.6 Microns, Jong Min Kim

Theses

The feasibility of constructing a feasible transission system to propagate 10.6 microns energy from a CO₂ laser is explored. The system is to be used in a clinical surgical setting to deliver as much as 100 watts of CW power from a surgical CO₂. laser to a surgical target.

The optimal transmission system is a slender flexible cylindrical structure, 1 mm in diameter and 1.5 m long. The structure should be sufficiently flexible to be bent into a 5 to 10 cm radius without a significant increase in the attenuation constant. For clinical applications the system must …

Evaluation Of Numerical Inversion Of Laplace Transformed Solutions, Yu-Chwin Lin

Theses

Here, some linear physical systems are analyzed by using the standard Numerical Laplace Transformation and Inversion method, including undamped and damped systems:

1. Undamped system: A bar clamped at one end and at one end free.

2. Damped system: Viscously damped linear discrete system.

The advantage of the Numerical Laplace Transformation method is that it reduces the inversion of the Laplace transformed solution to numerical integration; it makes the problem much easier to solve. In the present work, we also studied a new Numerical Laplace Transformation Inversion method by Wilcox (App.0 and Ref.l). The merit of this new method is …

Digital Signal Processing Implementing The C Language With Graphics Spectrum Analysis Display, Anuraksa Mahanirananda

Theses

Digital Signal Processing discussed in this thesis is concerned with the transformation of signals or complex wave forms From time domain to frequency domain and vise-versa, implemented on microcomputer systems. The primary principles are: speed of transformation, ease of usage as an application program, capabilities of graphics displaying transformed data (such as power spectrum analysis), storing these data onto record files, and capability of using these data Files and programs with other application programs.

We begin by discussing briefly, the concepts of Fourier theory, Discrete and Fast Fourier Transform, algorithms of Fast Fourier Transform and bit-reversal. Then we implement these …

Performance Of Second Order Delta Modulation System, Reza Aghazadeh Alavi

Theses

The performance of an ordinary delta modulation (DM) system under three types of input signals was investigated. These signals were band limited Gaussian noise, 800 Hz sine wave, and speech signal. The affects of 2nd DM added to the ordinary DM in improving the performance of the system were researched. This is called a Second Order Delta Modulation System. The obtained data showed an increase of about 3dB in the overall Signal to Noise Ratio (SNR) of the system, in the worse case.

Input to the 2nd DM is the band limited error of the first DM. A linear phase …

Reflections On Solid Modeling In Cad/Cam System, Yuh-Hwa Chyr

Theses

In this thesis, we will first study the mathematical fundamental for geometric modeling. It includes modeling space, representation scheme, and various characteristics for solid modeling. Then we discuss how a solid modeling system is integrated into an overall CAD/CAm system. What functions it performs, and what fuctions must be performed with other parts of the CAD/CAM systems. And how data can be transfered between solid modeling system and other CAD/CAM system.

Solid modeling has created a new era in CAD/CAM. A solid model is an unambiguous, three-dimensional, geometric representation of a design. The more design information a model can represent, …

A Model For Automatic Optical Scaling Of Type Designs For Conventional And Digital Technology, Bridget Lynn Johnson

Theses

In the history of type design, two methods have been used to scale type-- to produce enlarged or reduced letterforms from a reference size. With original handcut fonts, designers performed optical scaling (scaling by eye) that varied the proportions of letterform features over a range of sizes in a nonlinear manner. That is, letterform feature proportions were size dependent. This was an entirely manual and intuitive process. More recently, however, the use of the lens, as well as computational and other technologies, has allowed letterforms to be scaled automatically from a reference character, a simple proportional enlargement or reduction. To …

The Variability Of A Web Offset Newspaper Press Run As Measured By The Eastman Kodak Company's Customized Color Analysis Target, John C. Meyer

Theses

The variability of a press run as measured by Eastman Kodak Company's Customized Color Analysis Target was studied and quantified in the areas of Pre-press requirements, Press Performance and Color Measurement. The test was conducted on a web offset newspaper press maintained to industry standards. The target was printed along with three halftones consisting of high-key, low-key and normal images. The halftone images were be used by the pressman to visually check and evaluate the press sheets during the run to maintain quality. A running color bar was also printed to provide densitometric readings. The test target was be evaluated …

A Null-Balance Visual Densitometer, Ramon P. Baez

Theses

This thesis deals with the development of a Visual Densitometer, for measuring transmission density, called a "Null-Balance Visual Densitometer". This is a simple instrument made using a calibrated continuous tone negative step wedge. It was used for measuring continuous tone reference patches as used for process control of color separations, in place of an electronic densitometer. The measurements were made by a comparison between the control step wedge and the samples in close proximity over a light table. The basis for this instrument is the human eye's ability to differentiate between two areas of brightness in close proximity. The study …

The Architectural Theme In Painting, Allene Jones Ricker

Theses

The architectural theme has been used in painting in varying ways as decoration, in landscape, as composition and as abstraction. From the first century until the Renaissance, architecture was used by artists as decoration or as a backdrop, setting the stage and framing the figures. Architecture as subject matter continued to evolve in a manner nearly parallel to the development of the landscape. Architecture in the form of Roman ruins, for example, was used in picturesque landscapes.

Architecture in landscapes developed into townscapes. In both Holland and Italy the townscape was painted extensively. The Venetian view painters were interested in …

Characterization Of Monoclonal Antibodies Against Digoxin, Susan K. Alexandrovich

Theses

Five antibodies directed against digoxin were grown and characterized. Two separation techniques were tested to find the better method of separating bound the free fractions of ligand after competitive reactions with the antibodies. Charcoal separation was chosen. The antibodies were analyzed for affinity constant by the Scatchard Analysis. Cross reactivity data for two of the antibodies were collected. Four of the antibodies have satisfactory affinity constants for use in a digoxin assay. Cross reactivity studies showed varying amounts of cross reactivity with digoxin metabolites, but none with the steroids and lipid tested.

Application Of The Dram Software For The Dynamic Analysis Of A Linkage Mechanism, Deepak Namdeo Rode

Theses

The study provides the application of the DRAM software for the dynamic analysis of a linkage mechanism and presents a simplified version of the DRAM user manual. This user manual appears in appendix C. The linkage which is used for the dynamic analysis consists of three rigid couplers. Crank 2 of this mechanism is responsible for transferring motion to the other links. Kinematic and kinetic results by DRAM are compared with analytical results. Good agreement was observed. Since the DRAM user guide is not easy to understand, it was necessary to write a user-friendly guide. Several types of kinematic and …

Software Estimating: A Description And Analysis Of Current Methodologies With Recommendations On Appropriate Techniques For Estimating Rit Research Corporation Software Projects, Norma Armstrong

Theses

This thesis investigated, described, and analyzed six current software estimation methodologies. Included were Boehm's COCOMO, Esterling's Work Productivity Model, Putnam's Life Cycle Model and Albrecht's Function Point Determination. An implementation strategy for software estimation within RIT Research Corporation, a consulting firm, has been developed, based on this analysis. This strategy attempts to satisfy key needs and problems encountered by RIT Research estimators, while providing cost effective, accurate estimates.

Uguru: A Natural Language Unix Consultant, John Hanson

Theses

UGURU is a natural language conversation program, implemented in Prolog, which can manage a wide knowledge base of facts about Unix. The range and wording of questions that it understands are based on surveys taken of students, mostly Unix beginners. UGURU is also designed to accept statements in English that can be added as facts to the knowledge base. Each fact is represented as a "binding set:" a verb-oriented semantic net with the characteristics of directed acyclic graphs. The main actions taken by UGURU are divided between two primary modules, a parser and a retriever. To produce a binding set …

Assessment Of Classical Database Models For Representing Solids, Julia L. Deal

Theses

Solid modeling is being explored as a method of representing three dimensional parts for mechanical design and manufacturing. This work analyzes the data storage requirements of the Boundary Representation and Constructive Solid Geometry methods of representing solid models. The ability of the database models (Hierarchical, Network, and Relational) to support solid modeling needs is evaluated. The goal is to determine the database model(s) best suited to store and manage the graphical data for solid model representat ions . Background information about mechanical engineering, graphics, and database models is presented. Entity-Relationship diagrams are used to define data requ irements .