Digital Commons Network^™

Gwunder, Martin Gasser

Theses

This is the written report of a thesis project which was done in the form of a book. This book was produced as a dummy consisting of fifty-five double pages (spreads). The book was planned and executed in all details and it is ready to be printed. The visual part includes a number of photo-sequences: seventy-seven black and white photographs and five postcards. Within these series of images are sequences of seven Swiss poems, seven exerpts from American TV commercials, seven Malay proverbs, seven quotations from the MFA Handbook, passages from seven books dealing with different concepts of photography and …

The Effect Of Development Temperature On Kodak Pr 10 Instant Print Product Using A Comparative System Modulation Transfer Function For Analysis, Jon E. Van Tassell

Theses

The effects of temperature of development upon the final image quality of Kodak PR lOr were investigated. Image quality was defined as a Modulation Transfer Function obtained using a Square Wave Log Periodic target for quantitative analysis. Analysis of Variance tables were used to separate experimental error from actual temperature related variability. With a confidence level of 99% the temperature of development was found to affect the Modulation Transfer Function of this product. With temperatures below 48 degrees the effect was greater than with temperatures above 78 degrees but not greater than 90 degrees. Also documented was a decrease in …

A Business Primer For The Artist/Craftsman, Susan L. Alves

Theses

None provided

Light Scattering In Unprocessed Photographic Emulsions, Jo S. Kirkenaer

Theses

A method is proposed to measure scattering characteristics of non-processed photographic emulsions without using expensive or complicated computer processing techniques. A photo goniometer was assembled from a standard spectrometer, a lightsource and a photodiode. Film samples were measured both in air and in an index matching liquid comparing samples of two main categories, continuous tone pictorial emulsions and graphic arts copyfilms. It was learned that the measurements separated the samples into the above mentioned categories based on response variables such as scattergram and its corresponding Fourier Transform. This method is proposed as a tool in emulsion design engineering or quality …

Multi-Hospital Groups, Ronald E. Huber

Theses

Unavailable.

The Effect Of Emulsion Stabilizers On The Rate Of Solution Of Silver Halide Grains, Christopher L. Dumont

Theses

The effects of the emulsion stabilizers, 4-hydroxy- 6-methyl-l ,33a,7-tetraazaindene and l-phenyl-2-tetrazoline- 5-thione on the rate of solution-physical development of a monodisperse AgBr emulsion containing Carey-Lea silver sol were measured at a series of concentrations. A study of the effects of the silver halide solvent, sulfite has been stud ied along with a low-solvent surface developer. It was found that the tetraazaindene definitely had an effect on the rate of solution-physical development, while the l-phenyl-2- tetrazoline- 5-thione did not have a significant effect.

The Determination Of Using The Standard Screening Angles When Printing With 400-Count Anilox Rolls And 100 Line Images Via Flexography, John Ahrens

Theses

From the pioneering efforts of the early 1960 's, flexography has shown steady progress in the development of four color process printing. However, the ability to consistently produce it is limited to an elite group. The vast majority of companies have yet to competitively enter this demanding area of printing. For these companies the time, expense, and expertise required to conduct an indepth study is a major deterrent. Outside information must be made available to aid the companies. The FTA and its members have greatly contributed by publishing an array of information; although, some basic questions have yet to be …

Influence Of First Developer Solvent Levels On The Information Storage Capacity Of Negative And Reversal Images, Wendy R. Harrison

Theses

Silver halide solvents are commonly used in the first developer of a reversal process to obtain brighter highlights and a higher effective speed. An investigation was carried out to determine the effect of a low and high level of solvent on the sensitometric char acteristics as well as the covering power, granularity, modulation transfer function (MTF) and the information storage capacity of Plus-X reversal film 7276. The investigation was designed such that the only variable in the systems studied was the first developer. D-67, i.e., D-19 containing two grams liter^-1 of potassium thiocyanate, was chosen as the high solvent first …

Transient Phenomena Of Polymer : Aniline-Formaldehyde Fiber And Copolymer Aniline-Phenol-Formaldehyde Fiber, Ing-On Vibulbhan-Watts

Theses

The rotational viscometer which had a uniform stress, designed by Dr. W. Philippoff was used for measuring the viscosities of 6% L-200 in PRIMOL 355 and Lekutherm x-30. Viscosities of 6% L-200 in PRIMOL 355 (polyisobutylene) was measured to check the change of material that was left in the visometer for almost two years. The result showed that the new viscosities are higher than the older results.

Impingement Of An Axi-Symmetric Jet On A Flat Surface, Amir J. Daibes

Theses

An incompressible, inviscid irrotational flow model was used to represent the normal impingement of a circular axisymmetric jet upon a flat plate. An analytical investigation was conducted to determine the free surface of the jet and the solution of the potential flow problem was obtained using finite difference techniques for jet height-to-nozzle radius ratio of 2.4.

The velocity and pressure distributions at the plate surface and along the jet centerline were obtained.

The results from the finite difference solution are in close agreement with other most recent results from available experimental, and approximate solutions to the potential flow problem.

A Microprocessor Based Digital Logic Simulator, Kevin Dresher

Theses

It is the intent of this thesis to acquaint the reader with a tool which is available for use in the digital circuit design field. The reader is now able to totally simulate via DLS the digital logic design he creates on paper before it ever takes a hardware form. The computer program accepts a detailed description of the schematic and creates timing diagrams, loading statistics, cross references, and various lists for future documentation.

The user needs no programming knowledge and will find the requirements to run a simulation with DLS extremely user oriented. The simulation descriptions and command language …

The Characterization Of The Oxygen Transfer Capabilities Of Fermentors, Joseph Stephen Adamca

Theses

A method of characterizing the oxygen mass transfer capabilities of fermentors was developed where volumetric oxygen mass transfer coefficients are obtained using a modified sulfite oxidation method in conjunction with on line digital data processing. Carboxymethylcellulose is used in the reaction media to simulate the viscosity of typical non-Newtonian fermentation broths. Using this method, instantaneous values of volumetric oxygen mass transfer coefficients can be obtained for various combinations of agitation and airflow rates in different fermentor configurations. This data is useful in the scale up or scale down of fermentors.

Data obtained using this method have revealed that for a …

Analysis Of Unsteady-State Heat Conduction In A Cylinder With The Finite Element Method, Richard F. Bernard

Theses

Unsteady-state heat conduction in a cylinder of finite dimensions with constant physical and thermal properties was analyzed with the finite element method. Symmetry of the cylinder and application of Newman's method reduced the problem to two independent one-dimensional problems. Finite element equations for the axial and radial dimensions were developed utilizing Galerkin's method of weighted residuals. Crank-Nicholson approximations were used for time derivatives. A computer program was written for solution of the finite element equations.

Solutions obtained were conditionally stable; dependent on the value of the ratio KΔt/ρCpl². For values of the ratio less than 1/3, errors in …

The Removal And Recovery Of Fluoborate From Plating Rinse Waters, Terrence A. Hunter

Theses

Fluoborate poses a problem to electroplaters when discharged in their wastestreams. Therefore, a method for removing fluoborate from rinse waters is necessary. An ion floatation technique using a surfactant was developed at N.J.I.T. to perform this job. However, this technique requires long time periods therefore other methods were investigated.

Ultrafiltration was investigated as a replacement for the ion floatation technique. It would cut down the time required for the fluoborate removal. Also, electrolysis and the addition of excess acetic acid were tried in an attempt to separate the fluoborate and the surfactant in the ultrafiltration retentate. This system was evaluated …

Temperature Dependency Of The Group Interaction Parameters In The Agsm And Unifac Models For The Prediction Of Heats Of Mixing, Ignatius Okoronkwo Ojini

Theses

A four-parameter group-contribution model (UNIFAC) has been developed for the prediction of heats of mixing of non-electrolyte mixtures. Both the UNIFAC and AGSM models are evaluated over a wide range of temperature dependencies of the group interaction parameters. The UNIFAC model has been chosen over the AGSM model and an optimum parameter-temperature relationship has been established.

Adopting the optimum temperature dependency, group inter-action parameters have been calculated using UNIFAC for the prediction of four types of mixtures: n-Alcohols/n-Alkanes; Benzene/n-Alkanes; Nitriles/n-Alkanes; Amines/n-Alkanes.

An Experimental Study Of Photopolymerization In A Continuous Stirred Tank Reactor, Songvit Setthachayanon

Theses

An experimental study was carried out on the control of CSTR by on-off regulation of light intensity for the photo-sensitized polymerization of styrene. The controllability of the reaction temperature, the advantages of operating at metastable states, and the molecular weights of the polymer formed were discussed. The influence of feed temperatures, sensitizer concentrations, and residence times on the reactor performance characteristics were also discussed. Experimental results showed that polymer formed at the metastable state had a higher average chain length and narrower molecular weight distribution than that formed at the low stable state. While increasing the residence time shifted the …

Guidelines To The Implementation Of Printing Vocational Schools In Nigeria, Samuel Bademosi Adesorioye

Theses

This study is concerned with the implementation of printing vocational high schools in Nigeria. It has been too long a wait for the implementation of vocational schools in printing. The methodology of this study is based on the information gathered through personal interviews. The head of the schools teaching printing, the production manager, or the president or vice president of printing companies in both New York City and Rochester responded to the questions that appear in appendices C and D. For details see Tables 1 through 10. Also library research was employed to obtain background information on the American voca …

Plate Stability In Screenless Printing, Stephen E. Martin

Theses

Lithography in the minds of most people is a method of reproducing a photograph or artwork by means of a halftone screen. The screen, usually no finer than 400 lines per inch reproduces the image by varying degrees of density through control of the dot size. With screenless printing the image is reproduced without the screen, resulting in much better detail. The purpose of this thesis is to determine what type of plate material will work best with the "Association Product Coating", since the ST Sumner Williams plate that worked well with this coating is no longer produced. The criterion …

Aesthetics For A Working Environment, Gail Fredell Smith

Theses

None provided.

The Verification Of An Optical System Design For A Low Frequency Mtf Camera, Edwin B. Hoel

Theses

A proposed low frequency MTF camera system uses a cylinder lens to smear an area-modulated sinusoidal target into an irradiance-modulated sinusoidal image for the evaluation of a film's modulation transfer characteristics. The proposed system was constructed and evaluated. Resolution limits, field flatness, field sharpness, repeatability, de focus effects and system MTF were determined. The camera was tested with film and found to have an MTF value close to 1.0 for frequencies up to 10 cycles/mm at which point the function dropped off to a value of 0.2 at 30 cycles/mm. Off-axis images showed rapid degredation as a maximum MTF value …

Agn03 And Kbr Reagent Concentrations' Effect On Double-Jet Emulsion Grain Size Dispersity, Daniel D. Siems

Theses

Four levels of AgN03 and KBr reagent concentrations between 0.1N and 1.0N were used to study the effect of changing reagent concentration on the grain size dispersity of a primitive AgBr double-jet emulsion. The emulsions were precipitated in a continuous flow crystalizer at a constant pAg of 8.5 within the crystalizer. Emulsion samples were collected at 5 minute intervals during the make from the crystalizer and used to obtain grain size frequency distribution data. Through the use of multivariate analysis of variance, it was concluded with 95% confidence that AgNOo and KBr reagent concentrations ranging from 0.1N to 1 .ON …

The Design And Construction Of An Exposure Meter For Use With Infrared Sensitized Film, James A. Fitz

Theses

In this project, an exposure meter which is sensitive to, and calibrated for infrared radiation was designed and constructed. An EG&G SGD-100A silicon photodiode was chosen to use as the photodetector. This choice was based on cost, availability, ruggedness, stability, and sensitivity. A circuit using an operational amplifier to amplify the output of the photodetector was used. The circuit design allowed easy variation of the signal gain to give a detectable meter deflection under varying lighting conditions. Five different gains were used to allow use of the meter under conditions ranging from outside under direct sunlight, to inside with typical …

An Investigation On The Applicability Of Multi-Microprocessing In The Two Dimensional Digital Filtering Problem, Timothy J. Whitcher

Theses

Digital image processing has been receiving an increasing amount of development in recent years, largely because high speed digital com puters are becoming readily available. In addition, the advent of the microprocessor has revolutionized the capabilities of compact electronic systems. This thesis examines the applicability of microprocessors to digital image processing. Using a Z8000 microprocessor as a baseline, the computation time for a two-dimensional fast Fourier transform is estimated for various microprocessor architectures. These results are later compared to the manufacturer's specified computation times on a Floating Point. Systems AP-120B Array Processor.

Widestock Exposure Modification, Kurt D. Roberts

Theses

A system exists for the exposure of large pieces of sensitized material. The strips are exposed, processed, and viewed by transmitted light. This procedure is used to gauge the quality of the film coating process. There are three problems with the existing system: uneven illumination, the timers do not take into account light decay, and finally, the operators, on occasion, set up the wrong conditions for an exposure. The purpose of this thesis is to modify an existing process for the automated exposure of wide stock strips. These modifications are to replace the system's components with state of the art, …

Signage System For Abuja Internation Airport, Abuja Republic Of Nigeria, Hilary G. Marquis

Theses

The purpose of my thesis is to design a signage system for my country's new capital city international airport now under construction at Abuja. Although this project is not a professional contract, I have chosen this topic because of the almost true-to-life experience it has afforded me in working closely with government agencies. It is hoped that this contact will help government managers and planners understand that large construction projects need well thought-out environmental graphics programs. This signage system is designed specifically to orient passen gers from the point of entry on the airport premises to their leaving through the …

Halftone Dot Method For Image Evaluation Of High-Resolution Films Applied To Vesicular Film, Mark Gulden

Theses

A feasible technique for deriving the spread function and modulation transfer function of a vesicular film has been determined. This technique is based on a method described by R. Byer which does not require the use of a microdensitometer, but only that of a "macro" densitometer. The method utilizes the fact that a halftone dot will change in size as a function of exposure. The spread function of the vesicular film was approximated with a mathematical model. The results, although favorable in many ways, are not conclusive. Some of the advantages and disadvantages associated with this technique as applied to …

Design, Construction, And Verification Of A Photographic Color Paper Sensitometer, Daniel Marc Denkin

Theses

The thesis problem is to produce a sensitometer to expose photographic color paper to be used as control strips in a photographic color paper process. This problem involves designing, constructing, and verifying the sensitometer. Designing the sensitometer is done by looking at different methods of exposing each dye layer of a photographic color paper. These methods include: fiber optics or light guides, light integrating devices, and projection systems. The method which was chosen for this experiment is the projection system. After the method had been decided upon, a lamp model will be calculated using the spectral sensitivity curve of a …

Increased Image Resolution And Film Efficiency Via Vacuum Platens And Other Mechanical Devices, James A. Ruffing

Theses

With an appropriate lens, focusing arrangement, film and processing, motor driven 35mm cameras will attain resolutions of hundreds of line pairs per millimeter. The combination of a narrow depth of focus, unusually thin films, a relatively large film gate and rapidly advancing films can produce imagery with less than optimum resolution across or within individual frames. A vacuum platen and an additional styrene pressure plate were fitted to a motorized 35mm camera in an effort to insure the film lies flat. Continuous vacuum pulling mechanisms, suction and induction, were evaluated. Each system's simplicity, portability and statistically analyzed imagery were assessed. …

Ultrasonic Flaw Detection, Wayne Buchar

Theses

An ultrasonic microscope was designed and constructed to detect surface flaw defects on materials which contain natural discontinuities. The application of this flaw detection system to via-fill defects of single layer multiple layer ceramic substrates was considered. The microscope was evaluated for its depth sensitivity and resolution capabilities. The results of the experiment are that the ultrasonic system has repeatable depth sensitivities of better than ten microns, and resolution capabilities on the order of 3.3 cycles per millimeter. The application of the flaw detector to ceramic substrate via-fill defect inspection was verified.

A Microprocessor Based Control System For An Electric Vehicle, Ronald C. Moffatt

Theses

The control system described in this thesis is a low cost system designed to control the speed of an electric vehicle by adjusting the speed of a compound wound DC motor. The speed control method developed in this system is a combination of battery tapping, for control of the armature voltage, and pulse width modulation for field control; both generated by a microprocessor. Using a microprocessor, the control system is readily adaptable to a variety of motor voltages and motor control techniques by modifying the internal firmware of the processor. Overcurrent protection is included to prolong battery and motor life. …