Digital Commons Network^™

The Creative Imagination, Dorothy Sholtis

Theses

None provided.

Object With Pattern/Rubberstamps And The Metal Cutout, Joan Riccardi

Theses

None provided.

Novel Array Representation Methods In Support Of A Microcomputer-Based Apl Interpreter, Daniel Fleysher

Theses

Objective: To study novel ways of representing data arrays for potential application in a microcomputer-based APL interpreter. The goal is to find, for arrays containing mixed integers and real numbers, a way to improve both storage efficiency and thruput, over that obtainable using conventional APL interpreter array representations. Investigation: For the purposes of this study, three representative APL operators were chosen for implementation - dyadic addition, multiplication and selection. To establish a set of base cases from which to work, these three operators were implemented for two distinctly different data structures: Case-0: arrays containing only fixed length floating point data …

Model Automatic Focusing System For Linewidth Measuring Instruments, John Ingraham

Theses

This paper discusses research on an automatic focusing system for IC-linewidth measuring instruments. The instrument incorporates a collimated light source, a device to move a sample in small, precise increments, and a charge-coupled device. The autofocusing model would measure the step-height of a dielectric sample and correlate the height to a focus position. Thickness of samples on an enlarged scale were measured to verify the feasibility of this device.

An Analysis Of Stroke Fluid Flow In A Converging Channel Using A Penalty Function Finite Element Formulation, Keith A. Honkala

Theses

A penalty function finite element program is developed to study two dimensional creeping flow in a converging channel. The finite element solution is compared to the analytical solution of purely radial flow. The analysis reveals that the assumption of purely radial flow is valid for small apex angles, but is inappropriate for larger angles .

A Comparative Analysis Of Dna Molecular Crosslinking By Dichloro-N-Substituted Azaadamantane Isomers, Harry Robbins

Theses

A series of anti, anti-dichloro-N-substituted azaadamantanes have been synthesized (Henkel et al, 1981, J. Org. Chem. , 46, 3483) representing conformationally rigid nitrogen mustards incorporated into an adamantyl framework with well defined stereochemistry and fixed separation distances between alkylating centers of 3.6 A (1) and 2.5 X (2,3) (Henkel et al, 1981, J. Org. Chem., 46, 3483) to be used as structurally rigid probes of DNA alkylation and intermolecular crosslink formation leading to cytotoxicity. The aqueous solution stability and the extent of intermolecular DNA crosslink formation for both the N-methyl and N-piperdinoethyl series of isomers have been measured using novel …

Simulation Of An Open-Loop Stepping Motor System, Gregory Bell

Theses

This report presents a description and functional model of a hybrid stepping motor drive system. The motor drive methods of fullstepping and backstepping are presented as examples. Test methods for system characterization are described, and response characteristics for the simulated and experimental results are compared to verify the model. This paper shows that an open-loop stepping motor drive system can be accurately simulated to predict real hardware performance.

Determining Process Latitude With Electrically Measurable Test Structures, Jonathan Littlehale

Theses

Collection of linewidth data is an important part of photoresist characterization. Linewidth data are usually collected by optical measurements or scanning electron microscopy. Both of these techniques are tedious and time-consuming. In this work, electrically measurable test structures are used to collect linewidth data. These structures use a measured sheet resistance, a known length of conducting material, and the measured resistance of the structure to determine the linewidth. The benefits of using these structures include completely automated data collection and the ability to collect statistically significant amounts of data. This allows the use of existing statistical analysis software to analyze …

The Use Of Edge Gradient Analysis On Chrome And Emulsion Photomasks To Determine Modulation Transfer Functions, Marcy E. Levin

Theses

Using edge gradient analysis on chrome and emulsion photomasks to determine the modulation transfer function of a mask making system proved to be limited by the method in which the edge gradients were observed. Scanning electron micrographs were taken of the chrome and emulsion edges on various masks, and results showed that chrome photosmasks exhibit steeper gradients and better edge acuity than emulsion images. However, due to the ratio of line size to gradient size on each of the types of masks, it was decided that the gradient would not make a significant contribution to modulation loss in the image.

The Measurement Of Scatter And Absorption Using Three Spectrophotometric Techniques, Christopher Pearson

Theses

Three methods for scattering and absorption measurements were compared for correlation; Kubelka-Munk, 4pi and an in transmission compartment scattering measurement method. The results indicated highest correlation between the 4pi and Kubelka-Munk absorption measurements. The 4pi and Kubelka-Munk scattering measurements had the highest correlation for scattering, and almost no correlation was found between Kubelka-Munk and in transmission compartment scattering measurements.

The Effects Of Partial Coherence On The Imaging Of Lines On Photoresist, Robert Douglas Watso

Theses

A series of images of a AMI/RIT resolution mask was imaged at the following partial coherence values: 0.7, 0.65, 0.6, 0.55, 0.5, 0.45, 0.4, and 0.35. The line-width and slope of the 10 micron lines imaged at each particular partial coherence value was analyzed and evaluated. The slope of the developed photoresist sidewall improved significantly with a decrease in partial coherent illumination, except for the 0.7 to 0.65, range while the line-width decreased.

Spectrophotometric Color Formulation Based On Two-Constant Kubelka-Munk Theory, Eric Walowit

Theses

A new approach to computer color formulation based on non-linear least-squares techniques has been developed to characterize colorants and predict their behavior in mixtures. This approach allows the optimization of absorption and scattering calculations to characterize these colorants. This same method has been used to directly match the spectral reflectance of a standard with a mixture of colorants that yields nearly the same spectral reflectance as the standard being matched. Several advantages have been gained over more traditional methods: Kubelka-Munk K and S has been determined without primary binary blends, the spectral reflectance of the standard and proposed formulation exhibit …

Case Study Of Installing A Research Project Cost Accounting System, Marjorie Rolfsmeyer

Theses

The thesis, Case Study of Installing a Research Project Cost Accounting System by Marjorie Rolfsmeyer, explores the development and implementation of a computerized cost accounting system for research and development (R&D) projects within the Health Care Division of a major corporation. The author identifies the unique challenges of research cost accounting, which differs from traditional manufacturing cost systems due to its unpredictable nature and project-specific expenditures.

The study outlines the purpose of a project cost accounting system, emphasizing its role in budgeting, financial tracking, and managerial decision-making. It discusses how cost control mechanisms, including detailed expense reporting, job numbering, and …

In-Line Process Monitoring Of Spray Developed Diazoquinone Photoresist, Kenneth Sautter

Theses

As the minimum feature size of IC devices is reduced, the control of linewidth becomes moire and more critical. An in-line process monitor for spray developed diazoquinone-type photoresist has been constructed which enables a spin-developing module to automatically compensate for the numerous variables which can affect linewidths. The development time of a wafer is varied depending on the dissolution rate of the photoresist. Development is monitored by reflecting light from the wafer surface which is sensed by a photodiode. Variable development time has been shown to control linewidths as exposure dose and photoresist coating thickness were changed. The relationship between …

The Determination Of Paper Spread Functions And Their Fourier Transforms From Kubelka-Munk Absorption And Scattering Measurements, Brian Pridham

Theses

In the study of imaging on paper, the effect of the penetration of light into the paper is usually neglected. Measurements show that light does not emerge from the paper sample at the same spot where it entered. The manner in which the light spreads through the paper is described by the spread function of the paper. It was suspected that an estimation of the paper spread function and its Fourier transform could be made based on the Kubelka-Munk absorption (K) and scattering (S) coefficients of the paper using a general diffusion model. The results show that an estimate of …

A Study To Eliminate Moire Patterns Produced In Color Separations When Scanning Polachrome Cs Transparency Film On The Hell Dc-300 B/L Laser Scanner, Edwin Parker Price

Theses

The Polaroid Corporation, in May of 1983, introduced Polachrome CS color transparency film and a new process called the Autoprocess system. This system offers the convenience of obtaining instant color transparencies in about three minutes. The film has excellent projection and viewing characteristics. The product was designed to have its largest market with professional photographers. Polachrome's construction creates problems for the printer in that moire patterns occur during the separation process. This study gives a short background for both additive color screen films and dye layer films, and a comparison is made to help the reader understand the problems with …

A Comparison Of Training Available To Entry Level Naval And Merchant Marine Engineroom Personnel, Paul J. Bugelski

Theses

Similarities between occupations or industrial environments are often overshadowed by differences between goals, services, or products. From the time that shipboard steam propulsion became a practicality the Naval and merchant marine services have experienced this phenomena. For various reasons, the two sectors have ignored similarities between their respective occupational sub-groups, e.g. engineroom crews, and the training which facilitates each group's performance.

Manning and training problems, related to the evolution of automated shipboard propulsion plants, have been shared by the U.S. Navy and commercial ship operators. Recent events such as the British Falkland Islands crisis and the implementation of the U.S. …

A Maintenance Program Guide For The Non-Technical Building Manager, Luis M. Tavares

Theses

For the most part, the title of Building Manager is conferred upon an individual who is given the responsibility of services support for a facility. However, this title many times is carried by men/women who are responsible not only for the upkeep of the general building, janitorial, and food services but also for the safekeeping of the building equipment, such as mechanical and electrical machinery. At times, these individuals may be involved with general service responsibilities and tend to lose sight of maintenance needs.

In order for the Building Manager to implement maintenance successfully, he/she must understand the close cooperative …

Conversion And Kinetics In The Reaction Of Chloroform With Water Vapor At High Temperatures, Chii-Guang Hwang

Theses

This is an experimental study on thermolytic reactions of chloroform with excess water vapor where kinetic parameters are determined and complete product analysis made at atmospheric pressure over a temperature range from 550to 1050°C. In this study, water vapor was introduced as a reactant to convert chlorine in chlorocarbons to stable HCl which is an easily neutralized end-product and thereby completely destroy chloroform. Substantial amounts of thermodynamically stable species: HCl, CO, CO₂, C(s) etc. were observed as products.

The reaction was studied in a 46cm tubular flow reactor mounted in a furnace that had three independently temperature-controlled heating …

Reactions Of Hydrogen With Chloroform And Trichloroethylene At High Temperatures, Burhan Mahmood

Theses

The reactions of chloroform and trichloroethylene with hydrogen in the temperature range 550 to 1000°C were studied using tubular flow reactors of varying diameters. The residence time range was from 0.05 to 3.0 seconds.Two different concentrations of the chlorinated species were used, each with hydrogen in large excess. Flat temperature profiles (+/- 5°C) were achieved over 80 to 85 per cent of the 45 cm long reaction zone, with inlet gases preheated to about 400°C.

No chlorinated hydrocarbons, products or reactants were observed at /above 850°C. The major products at these temperatures were C₂H₂, C_{2 …}

A Comparison Of The Biodegradation Of Phenol And O-Chlorophenol Using A Municipal Mixed Liquor And Three Commercial Microbial Preparations, Nigel P. Mcmullen

Theses

The biodegradation of phenol and O-chlorophenol was studied in six-liter batch reactors, using a municipal mixed liquor (from the Livingston, NJ treatment plant) that had not previously been exposed to either of the substrates. In addition, three commercial microbial preparations: BI-CHEM (Sybron), Hydrobac (Polybac), and LLMO (General Environmental Science), were tested alone and in combination with the municipal mixed liquor.

It was found that the municipal mixed liquor performed significantly better than any of the commercial preparations by themselves. When the commercial preparations were mixed with the municipal mixed liquor in a ratio of 1:10 it was found that the …

Failure Rates And Leakage Current Increase In Tantalum Capacitors Of Different Manufacturers, Joseph G. Grant

Theses

This study has determined the effect of high humidity and temperature on solid tantalum capacitors, from five different sources.

The reasons for using capacitors from five different prestigious sources is to first determine how the parameters change with the different manufacturing techniques used by the different sources. Secondly to rank the different sources according to reliability. The parameters that were measured before and after the "1000 hour" high temperature and humidity test were, capacitance, leakage current, and equivalent series resistance. All the capacitors showed significant increase in leakage current after the test, but there were wide variations in catastrophic failure …

Comparative Study Of Computational Methods For Kinematics Of Mechanism Analysis, Ren-Jea Wang

Theses

This thesis introduces three numerical methods of solving nonlinear algebraic equations, i.e. Newton's method, Brown's method, and Brent's method, and applies these methods to kinematics of mechanism problems for comparative study.

Firstly, each method is reviewed in some detail. Then experimental computer programs, NABKAP(Nonlinear Algebraic equations Based Kinematic Analysis Programs), are developed based on the above methods and used to solve kinematic of mechanism problems. Example problems include various kinds of four-bar mechanisms and two degree of freedom mechanism. Lastly, each technique is compared with the others based on the above computational experiences.

The FORTRAN programs used for this study …

On Circular Hvac Duct Design Through Stress Analysis, Chien-Chung Lee

Theses

In this thesis, comprehensive studies through stress analysis of the circular HVAC ducts are made. The ducts are made of thin gaged steel sheet, and reinforced by stiffeners that are made of hot-rolled steel sections of L or C shapes. The ducts are loaded with pressure, its own weight and the possible seismic accelerations. A comprehensive FORTRAN program is developed as an aid Lo achieving the optimum design of circular ducts, i.e. duct thickness, stiffener spacing, stiffener size and seismic span length, Several stress analysis tables and a design parameter plot arc, provided in this thesis Lo facilitate design optimization.

Violence In Southern Literature, Lucy Katherine Tejero

Theses

This thesis explores the recurring theme of violence in the works of key Southern writers—William Faulkner, Carson McCullers, Flannery O’Connor, Eudora Welty, and Robert Penn Warren. It argues that violence in Southern literature is not merely sensational or gratuitous, but deeply tied to the region’s historical, social, and cultural realities, particularly the legacies of slavery, the Civil War, and entrenched racial hierarchies. By situating each author within this context, the study demonstrates how acts of violence in their fiction serve as a lens through which to examine moral conflict, social change, and human frailty.

Faulkner’s depictions of brutality are shown …

Contrasts In Management And Productivity Between The Japanese And American Systems; (What Can And What Is Being Done), Jim Venables

Theses

This paper, "Contrasts in Management and Productivity Between the Japanese and American Systems; (What Can and What Is Being Done)" by Jim Venables, provides a comprehensive comparative analysis of Japanese and American management styles, highlighting their impact on productivity, corporate culture, and organizational effectiveness. Beginning with Japan’s post-World War II industrial ascent, the study attributes much of the nation's economic success to superior managerial practices rather than external factors such as labor costs or resources. The paper juxtaposes two corporate giants—Matsushita Electric (Panasonic) and International Telephone & Telegraph (ITT)—as representative models of their respective systems.

The Japanese model, exemplified by …

Utilization Of The Digital Vax 11/750 Computer In The Administration Of An Adult Evening Collegiate Program, Barbara Barr Dabbs

Theses

Unavailable.

Interest-Free Banking In Islamic Economics, Alsharif Abdulmohsin M. Alghalib

Theses

This project investigates the possibility of the movement and proposals for establishing interest-free banking within the systems presently existing in the Muslim countries . which range from free enterprise in the western sense to socialist attempts. .

This project takes as precepts the Islamic thought in economics; it does not occupy itself with their legal and ideological justification but rather it goes on to investigate their economic significance and implications . In other words , the Islamic economy is given by assumption in this project . Its purpose is to show how this economy works and how its major variables …

The Effects Of Scheduling On Public School Instrumental Music Education In Saint Louis County, Missouri, Susan M. Broeker, Timothy E. Pfeiffer

Theses

To determine the effects of scheduling on instrumental music programs in the public school districts of Saint Louis County, Missouri, a questionnaire was distributed to fifty-two instrumental music teachers in twenty-eight districts . We proposed to find common concerns shared by instrumental music teachers with regard to the scheduling of their classes. Our respondents concurred on specific scheduling situations that cause either alteration or complete elimination of their programs. Elementary curriculum is crowded with numerous non-academic offerings which compete for student time. Missouri has recently mandated additional secondary requirements in math and science without raising fine arts credits. This has …

Success: A Reading And Writing Program Compared To A Basal Reader Program, Helen Jansen

Theses

The Wentzville R-IV School District initiated a pilot program using the SUCCESS in Reading a nd Writing approach to teaching reading in the Fall of 1984. This study was conducted to compare the effects of the SUCCESS approach on the vocabulary , comprehension , attitudes , and behavior of the students participating in the pilot program to those who were taught in the Houghton-Mifflin basal reading program . It was predicted that students who experienced instruction i n the SUCCESS app roach would achieve significantly greater gains in vocabulary and comprehension . It was also predicted that the SUCCESS students …