Digital Commons Network^™

An Evaluation Of The Relationship Between Optimum Tone Reproduction And Reproduction Size, Thomas A. Benson

Theses

The thesis is an evaluation of preferred tone reproduction as a function of reproduction size. When photographs are reproduced photomechanically using the halftone process the main limitation in achieving a facsimile reproduction is the density range of the printing process. Because the printing processes normally used cannot achieve the same high density range as a photograph, tonal compression must occur. The manner in which the tonal compression is achieved has an important effect upon the appearance of the reproduction. The tone reproduction curve is a graphic method used to describe the relationship between the density of the original and the …

A Study Of Ink Trapping Comparing Gravimetric And Densitometric Methods Of Measurement, Jui-Lin Hsu

Theses

In 1958, Preucil suggested an equation to calculate ink trap based on measurements of a printed sheet with a densitometer. Preucil's equation was based on the additivity rule and the proportional rule. However, these rules do not hold in all cases. Several alternative equations have been suggested. This study intends to examine the effectiveness of three ink trap equations using densitometry by means of comparing the calculated values to those measured by the gravimetric method. An attempt is also made to estimate the value of maximum printable density, Dm, in Hamilton's equation. The theoretical basis of each equation is briefly …

Color Transformation Modeling For Printed Images Using Interpolation Based On Barycentric Coordinates, K. Douglas Gennetten

Theses

This document is a report on the research of a potentially superior method of color image transformation for producing rapid and accurate printed color output from a digitized color image. The primary objective is to reduce the complexities, inaccuracies, objectionable artifacts, and processing time common to current methods of color modeling. A new method of vector-corrected mathematical modeling combined with improved color space interpolation is studied. This achievement allows for rapid automatic closed-loop color-match calibration between image capture and output devices. Currently, digital image creation or manipulation systems rely on image proof printing which is slow and often of poor …

Visual Metaphors In Computer-Generated Information Graphics, Sidney E. Jablonski

Theses

None provided.

Analysis Of High-Speed Rotating Systems Using Timoshenko Beam Theory In Conjunction With The Transfer Matrix Method, Beth Andrews O'Leary

Theses

Higher operating speeds and increased sensitivity of modern electro-mechanical systems require improved methods for the computation of critical speeds and system response of flexible rotating shafts. Many high-speed systems generally contain disks with masses approaching the mass of the shaft. These observations emphasize the importance of including the effects of rotatory inertia and shear deformation of the shaft in the analysis. Traditional theory, which models a massless shaft, would be inaccurate for these systems. An analysis of flexible rotor systems has been performed using the Transfer Matrix Method. Although the method is well known, the present study utilizes Timoshenko Beam …

Points Of Hue, Andrea Kundin

Theses

My intent in this thesis is to display the visual capabilities of the computer as a tool to assist fabric designers, interior designers and consumers in a growing and demanding market. These ideas evolved out of my own personal interest in two seemingly different yet historically related fields, computers and textiles, and my feeling that there might be an obvious solution to the somewhat complex problem of visualizing surface pattern, texture and color in relation to the environment.

Provenance Determination Of Bronze Age Pottery Using Neutron Activation Analysis, Debra Ann Kipler-Koch

Theses

Neutron activation analysis has been used for provenance determinations of Bronze Age pottery from two cities in the Jordan River and Dead Sea areas . A pottery shard group believed to represent the local clay composition of one of the sites based on statistical clustering procedures was used with a dilution factor method developed by H. Mommsen and colleagues (1) to determine the origin of the shards. Based on the dilution factor method, a provenance determination has been established for three of the thirty - two shards analyzed. Irradiations of 30 min, 1 hr, and 4 hr duration were performed …

Finite Element Analysis Of Embedded Blood Vessel Mechanics, I-En Lin

Theses

Cardiac pump function is closely linked to myocardial oxygen supply during the cardiac cycle. Variations in cardiac output must be met with concurrent shifts in tissue blood flow if changing myocardial oxygen requirements are to be satisfied. Of particular importance is the adequate perfusion of the left ventricular myocardium. Experimental evidence indicates that some ninety percent of left ventricular oxygen demand is generated during systolic contraction of the myocardium. Paradoxically, blood flow measurements in the left coronary artery suggest minimal systolic perfusion. The asynchronous, phasic character of left coronary blood flow and myocardial oxygen demand has prompted much research into …

Family Album, Philip Burzynski

Theses

None provided.

Comparison Of Four Digital Halftone Screen (Dither) Patterns Using Quantitative Analysis Of The Binary Image Microstructure, Jacquelyn S. Ellinwood

Theses

The ordered-dither halftoning technique which reproduces continuous tones with spatially encoded binary imaging elements uses the digital halftone screen. The effect at the microstructural level of four screens on tone reproduction, spatial signal reproduction, and quantization noise is evaluated by measuring the tone reproduction curve (TRC), the two-dimensional Fourier transform of a constant density patch, the degree of harmonic distortion (THD), the system Modulation Transfer Function (MTF), and the Wiener Spectrum (WS) produced by each screen. The applicablity of these five conventional image evaluation metrics on binary output is also evaluated. Spatial averaging is done to convert the binary output …

An Investigation Of New Methods To Improve The Accuracy Of Modern Color Spectrophotometers, Kelvin H. Petersen

Theses

A study into the use of reflecting tiles to determine spectrophotometric errors and the corresponding correction values was accomplished. A method was developed to calculate the wavelength scale accuracy (out to a wavelength error of 5nm) using the inflection points of reflecting tiles' spectrophotometric curves. Using simulated error data, wavelength accuracy was determinable at seven distinct wavelengths over the range of 440 nm to 705 nm within an accuracy of 0.2 nm. Three methods, the Matrix, Selection, and Non-Linear, were developed to increase the accuracy of spectrophotometric data. Each method determined and corrected spectrophotometric data differently. The Matrix method was …

Study Of Steel-Concrete Interface Behavior Of Reinforced Concrete Members, Jun Wan

Theses

The main objective of this thesis work is to study the steel-concrete interface behavior of reinforced concrete members using the nonlinear finite element method.

The reinforced concrete member was modeled as a continuum consisting of plane stress rectangular elements which represent the concrete, pin-joint two node bar elements which represent the reinforcing steel, and the nondimensional linkage elements which represent the bond stress-slip, aggregate interaction and dowel action effects. The load increment procedure is employed to carry out the nonlinear analysis.

An axially loaded tensile specimen, a deep beam specimen and a shallow beam specimen were analyzed. The results from …

Environmental Assessment In Bioethanol Technology Using Immobilized Yeast Cells, Minoo Kandy Zarnegar

Theses

This study is undertaken from the standpoint of water pollution evaluation in bioethanol technology, using immobilized yeast cells. Evaluation of water pollution caused by immobilized yeast fermentation is the main objective of this research.

The pollution in water remaining at the end of ethanol production, which is normally discharged in the wastewater stream, has been analyzed by the measurement of biological oxygen demand (BOD), since BOD measurement is one of the widely used parameters for water pollution evaluation. BOD obtained from produced water (stillage) was between the range of 115- 360 mg/l. The variation in BOD depended upon the removal …

Thermodynamic And Leaching Studies Of Various Systems, Satya D. Rami

Theses

The group contribution approach is a reliable and fast method for the prediction of liquid phase activity coefficients in none lectrolyte, nonpolymeric mixtures at low to moderate pressures and temperatures between 300 and 425 K. It has become widely used in practical chemical engineering applications in cases where little or no relevant experimental information is available.

The two group contribution methods examined in the course of this work, are the Knox and & UNIFAC models. Group interaction parameters are evaluated for each of these models and results compared. Although the results for both models are similar when sufficient data are …

Use Of The Lms Algorithm In Ecg Analysis, Xiaohua Yang

Theses

The purpose of this thesis is to develop an IBM PC-AT based system to effectively process electrocardiogram (ECG) signals. Adaptive filter theory is used to implement a noise cancellation system (adaptive noise canceller), which adaptively cancels the ECG signals resulting in real ECG noise. The adaptive process is based on the well known least-mean square (LMS) algorithm.

The noise canceling system is software based. Several programs have been written, which include analog to digital converter control, data acquisition and storage, data retrieval, adaptive filtering and digitized data graphics.

The thesis presents numerous computer experiments. The performance of the adaptive noise …

Experimental Evaluation Of J-Integral For Concrete Subjected To Impact Loading, Naishan Zhang

Theses

This thesis presents an experimental evaluation of J-integral for concrete subjected to impact loading. Twenty four three-point bend specimens with two different thicknesses and mid-span notch lengths were tested under impact velocities of 167.22 in/sec (424.74 cm/sec) and 261.78 in/sec (664.92 cm/sec). Multi specimen method was used to analyze and estimate J_I and its critical J^-Ic values. Effects of specimen thickness and impact velocity on J^-Ic values were observed and discussed. Evaluation of J^-Ic Values from the experimental results of this study indicated that can be characterized as a material constant even under different impact velocities. …

Progressive Transmission Of Images Using Pyramidal Structure, Chin-Hua Hsu

Theses

A progressive image transmission scheme based upon Laplacian pyramid structure is used for image coding over low-bandwidth channels. The filtering and differential pulse code modulation (DPCM) methods of image coding are generalized to allow quantization of the Laplacian images. Filtering is performed with a local, symmetric weighting function. The three different quantizers, (1) scalar quantizer, (2) memoryless vector quantizer (VQ), and (3) finite state vector quantizer (FSVQ), are used here to compare the results. In the receiver end, the image can be reconstructed using reverse procedure. The reconstructed image is not the same as the original image because of the …

Image Quality Analysis Of The Reproductions Of Black And White Photographs Obtained From A Desktop Publishing System, Manuel Fabián Ruiz-Laverde

Theses

This research project was directed to characterize the variables that govern the black and white reproduction process in a desktop publishing enviroment (DTP), which in this case is formed by: a Macintosh II computer, a Mycrotek 300A scanner as the inputing device and a LaserWriter as the outputting device. The specific goal of this research was to find the ideal settings of cell size and resolution for each type of black and white photographic image that would produce the best reproduction possible from the system. Two different experiments were performed, the first one using a gray scale and a resolution …

Laser Perforation For Computer Paper, Claude F. Gattuso

Theses

In today's computer paper printing, cross and edge perforations are done only by mechanical perforators. The mechanical perforation process works fine since the width of the bridges and the length of the holes to be perforated remain large. Concerned with improvements in quality, printers have introduced microperforations. The holes and bridges of the perforation pattern are so small that after the user has torn off the sheet of computer paper along the perforation pattern, the edges of the document are very smooth and clean. Unfortunately, microperforations are reaching the limits of what can be achieved by the mechanical perforators. Because …

The Introduction, Demonstration And Evaluation Of A New Typeface Identification System, J. Ames Parsons

Theses

Graphic communicators, including typographers, designers, and descriptive bibliographers, are often called upon to identify typefaces. Since there are thousands of typefaces available in the marketplace today, it is unlikely that any one designer, typographer or bibliographer can name them all at sight. Accordingly, there is a need tfor a typeface identification system. The purpose of this paper is to introduce, demonstrate and evaluate such a system. An identification system called TYPE-ID was developed and tested. Two principles -- the "pass option" and the "null digit" -- were introduced. A sequence of questions was written for a number of different characters. …

A Study Of Productivity Levels Under Theory X And Theory Y Management Styles, Kevin R. Hranicka

Theses

This thesis will focus on management and the effect of management orientation and style upon work group productivity.

Researchers have attempted to find methods for managers to use to increase employee work output or productivity for decades. As early as the beginning of the nineteenth century industrialists were experimenting with different methods of operation and organization in the hopes of raising output levels and increasing worker satisfaction. In the last fifty years management styles and employee productivity have played an ever increasingly important role in the economy as society has continued to institutionalize its needs and its providers.

This change …

Computer Use In Educational Presentation Systems, Randy J. Malta

Theses

Computer based Interactive Multi-Media has many uses in creating educational presentations. Apple's HyperCard has unlimited applications for use in Interactive Video presentations. Basic Interactive Video terminology and the five levels of Inter active Video Programs are defined. The process of producing an Interactive Videodisc, as well as the necessary production equipment is described. Interactive computer programs have an exciting future of use and expansion in the many and varied aspects of education.

Pay Equity: The Time Is Now, Stephanie Ann Nowack

Theses

The thesis "Pay Equity: The Time Is Now" by Stephanie Ann Nowak explores the persistent issue of wage disparity between men and women in the United States. Highlighting historical and societal factors, Nowak examines how traditional gender roles have contributed to systemic pay inequities, with women consistently earning less than men in comparable positions. This wage gap, exacerbated by societal expectations and occupational segregation, has been perpetuated by entrenched biases that undervalue women’s work, even in fields requiring similar skills to male-dominated roles.

Nowak discusses the impact of landmark legislation, such as the Equal Pay Act of 1964, which aimed …

Functional Priorities Within Marriage: Moral Values, Spouse, Children, And Occupation, John Paul Splinter

Theses

There are many components involved in creating healthy marriages. This search examined one of these components: Establishing functional priorities within marriage. Therefore, this research was a study of the priorities in marriage, priorities which will provide moral direction, a certain amount of structure, and a balanced approach to handling activities and relationships.

These priorities were, in order of importance: (a) Moral or spiritual values; (b) the dyadic (husband-wife) relationship; (c) the triadic (husband-wife/child) relationship; and (d) occupation. It was the thesis of this study that these priorities offered most to a marriage unit when maintained in the order prescribed here. …

Computer-Based Sales Information System, Mark R. Watkins

Theses

This paper will focus on a study of a Computer-Based Sales Information System as it would primarily apply to firms selling in industrial markets.

Over the past several years theorists have debated the issue of computers . Some theorists believe that computers enhance our work environment while others believe that computers eliminate jobs and create resentment. The first group supports the theory that computers aid our work environment and make our jobs more productive. The second group supports the theory that computers disrupt the work environment and cause inefficiencies through costly unproductive training of skills that are not job-related.

The …

Patent Registry Database, Subhadra Ayyagari

Theses

The purpose of the study is twofold. First, to demonstrate the ability of a database to handle a large number of patients and accompanying medical information to allow the clinician to diagnose and treat them with greater efficiency and rapidity. Secondly, to create a patient registry database for children with growth problems (St. Joseph's Hospital group study).

Computing trends indicate that over the next few years, computer stored medical records will become technically and economically feasible on a broad scale. Many clinical databases are already becoming available for doctors and hospitals to use. The benefits of computer-based medical records out-weigh …

International Purchasing, Mary Gisi

Theses

The purpose of this research is to examine the factors of why the purchasing professional is procuring foreign vs domestic commodities.

This paper will review the early history when the U.S. started to buy goods offshore and continued over the years to expand their foreign vendor base.

An examination of literature and periodicals have suggested the reasons why the purchasing professional will need to expand his/her foreign vendor base of companies as to assure that the quality, technology and availability of needed materials will be at his/her disposal in order to compete in the global market place.

To develop conclusions …

A Sql Front-End Semantic Data Model, Marc Richard Lodico

Theses

SQLSDM is a "front end" semantic data model to a SQL relational database management system (RDBMS). SQLSDM provides a more semantically complete RDBMS through the implementation of a Domain and Relational Integrity scheme. SQLSDM provides integrity definition functions and a sub-system to interpret SQL commands . Integrity system tables are created through the use of SQLSDM ' s domain definition command and SQL ' s "CREATE TABLE" command. As SQL database update commands are interpreted, SQLSDM uses these integrity tables to enforce domain and referential integrity. SQLSDM operates virtually transparent to the user and provides for greater database consistency and …

Parametric Splines In Tension, Surendra K. Gupta

Theses

A brief review of curve fitting terminology is presented, and the cubic spline interpolation scheme is outlined. Parametric and non-parametric curve fitting techniques are compared. The technique to fit parametric cubic splines is derived using the Euler- Lagrange formulation. Previous work on splines in tension is identified. Employing the notion of splines in tension, a method is proposed to fit a parametric curve to a set of (n + 1) points in ^-dimension space satisfying a specified set of boundary conditions. The curve fitted will not have any inflection points within any span and will be invariant with respect to …

A Survey Of Psychotherapists Conceptions Of Self-Actualization, Constance C. Jones

Theses

Therapists views of the nature, function, and effect of the self-actualizing capacity in their clients were investigated. Variation in views as a function of therapists ' gender, experience, and theoretical orientation was also examined. The researcher gathered the information by randomly selecting psychologists from the American Psychological Association's Register and as king 35 men and 25 women to respond to a 12-quest ion self -administered questionnaire.

The results from the questionnaires were coded and grouped into general categories . The responses seemed to fall naturally into two broad groupings of (a) psychological and physical (internal phenomena) effects or (b) factors …