Digital Commons Network^™

A Metalsmith's Guide To Toxicology, Margery Beth Rose

Theses

Not listed.

Application Of The Finite Element Method To The Solution Of Maximum Fillet Stresses In Loaded Projections, Victor Biller

Theses

This thesis analyzes a geometric configuration under a loaded condition and establishes location and magnitude of the maximum fillet stress by the use of the Finite Element Method. Results are compared to Heywood's published study.

Illuminated Porcelain Forms, Janet Kellner

Theses

None provided.

A Comparison Of The Effects Of Viscous And Immersion Processing On Small Image Sizes In Originals And Duplicates, James Fahnestock

Theses

A test target with three two bar groups was designed around the DIM microfilm standards. It was produced photographically on a litho film. This target v/as used to discover the factors significant in determining small image sizes and spacings in a microfilm. A 16 mm film holder was designed and built to facilitate the microfilm imaging process. Second and third generation images were made using a liquid-gated contact printing prodedure. It was found that the optical image size an the film at the time of exposure, the image generation, and the optical image size and the density interaction were significant …

Adsorption On Activated Flyash, John William Kubarewicz

Theses

An experimental study was undertaken to compare the adsorptive characteristics of activated carbon, flyash, and activated flyash. Due to the contradictory evidence available in the literature, emphasis was placed on the effect of acid activation on the physical properties of the adsorbent. The experiment consisted of two parts; batch isotherm studies, and continuous column operations. An artificial sewage composed of a mixture of deionized water and beef broth was used as the adsorbate. This solution was prepared daily and exerted a COD of 225 ± 30 mg/l. Flyash activation was found to increase the degree of adsorption indirectly rather than …

The Photograph As Symbolic Presentation Of Subjective Reality, Abigail Perlmutter

Theses

None provided.

Identification Thresholds Of The Human Visual System For An Alphanumeric Resolution Test Object, Mark Bobb

Theses

Many investigations of the detection threshold of the human visual system have been conducted, and a few recognition threshold studies can be found, however no identification threshold data are available. This paper documents research on the observer's identification threshold for an alphanumeric resolution test object presented at various average luminance levels, contrasts, and contrast polarities. These factors affected the identification threshold in a similar way to the effects they exert on the observer's detection and recognition thresholds; the test object contrast being the most significant factor. Direct numerical comparisons between the various thresholds were not possible due to the large …

The Chemical Effect Of Ultrasound On Cyanide Solutions, Nabil R. Zaki

Theses

An experimental study was undertaken to investigate the chemical effects of high intensity ultrasonic radiation on cyanide solutions. The effects of aeration, concentration of cyanide and temperatures on the reaction rate are investigated. The experiment was preformed in a 30 mm pyrex tube immersed at a fixed height in a constant volume water bath. Ultrasonic energy was applied through the use of a transducer epoxied at the bottom of the water bath. The power inputs to the transducer were 40W (27KHz) and 100W (21KHz).

At a power of 40W, ultrasound had no chemical effect on cyanide solutions. At 100W, hydrogen …

The Effect Of Targets Having Selected Line Width To Space Width Ratios On Spurious Resolution And Resolving Power, Milner Noble

Theses

Six radial targets having different line width to space width ratios were made. The effect of the ratios on the phenomena of spurious resolution and resolving power was studied on a fine grain and a coarse grain film. Spurious resolution patterns were undetectable when the dark space exceeded five times the width of the bright line. Resolving power values reached their maximum when the target contained lines that were one-fifth the width of the dark spaces between them.

A Communication Program For The Comprehensive Regional Development Plan, Steven Tagg

Theses

None provided.

The Thermodynamics Of Electrolytic Solutions, Eric Robert Bixon

Theses

The thermodynamic properties of solutions of electrolytes may be accurately determined by the measurement of the activity of the s6lvent. when the. solute is nonvolatile, this quantity may be obtained from measurements of the lowering of the vapor pressure caused by the presence of the dissolved solute.

An experimental method has been devised to measure this effect using a semi-conventional Othmer Still. The experimental apparatus has been constructed. and evaluated. Data has been-obtained for the vapor pressure lowering of methanol due to the presence of dissolved electrolyte for five different electrolyte-methanol systems. An extrapolation technique was developed to make use …

Separation Of Isomers Via Thermal Parametric Pumping, Vincent J. D'Emidio

Theses

Continuous and semicontinuous thermal parametric pumps for separating isomers were experimentally investigated using the model system glucose-fructose-water on a cation exchange resin adsorbent. A comparison was made between the experimental data and the calculated results by a method based on an equilibrium theory. The method invokes the assumptions that a multicomponent mixture contains a series of pseudo binary systems. Each binary system consists of one of the solutes as one component and the common inert solvent as the other component. It has been shown that under certain conditions, the pump with feed at the enriched end has the capacity for …

A Preliminary Study Of The Thermodynamic Limitations Of The Nrtl/Lemf Equations, Robert Petrie

Theses

Analytical evaluations of the second and third derivatives of the molar Gibbs energy of mixing for the NRTL/LEMF equations indicate distinct zones of miscible and inmiscible prediction.

These calculations for a number of different α's have produced approximate miscibility limits for both NRTL/LEMF energy parameters and infinite dilution activity coefficients of a given system.

Transient Phenomena Of Polymer Solutions, Nikolaus Zwetkow

Theses

With the aid of a rotational viscometer, several transient phenomena were studied with different polymer solutions. In order to be acquainted with the operations of the rotational viscometer, viscosity measurements were made on polystyrene solution of a 7.14 wt. % NBS-2-35967 in a 35 - 65 mixture of aroclor and TCP, polyisobutylene (16.5% in mineral spirits), Indopol H-1900 (polyisobutylene) and 4.5% polyisobutylene in Primol 355. All these were done at a temperature of 77°F, except for Indopol H-1900 which was done at different temperatures. The results are listed in the section of tables and graphs.

Viscosity was measured with a …

The Thermal Dehydration Of Magnesium Sulfate Hexahydrate (Mgso3.6h2o) And Magnesium Sulfite Trihydrate (Mgso3.3h2o), Raafat F. Abdel-Malek

Theses

The thermal dehydration of MgSO₃.3H₂O and MgSO₃.6H₂O have been studied by differential thermal analysis, differential scanning calorimetry and thermal gravimetric analysis.

Similar studies by other groups led to contradictory conclusions. In this investigation, these results were reconciled and it was concluded that MgSO₃.6H₂O, under equilibrium conditions, dehydrates in two steps through the intermediate formation of MgSO₃.3H₂O.

One consequence of this work is the development of a simple analytical procedure, using TGA, for the quantitative determination of both hydrates in mixtures and in the presence …

Design And Construction Of A Glass Casting Furnace, Lawrence Livolsi

Theses

None provided.

Rap And Produce: A Thematic Communication Program, Paul Schulte

Theses

None provided.

A Comparison Of The Properties Of Conventional Offset Ink And Ultraviolet Ink, Vanchai Sirichana

Theses

Some of the advantageous characteristics of ultra violet ink are said to be the absence of pollution and reasonable energy consumption as well as rapid drying (curing). Little is published about physical properties or print quality. Printers require information in this regard because the reports which are presently available are not clear and lack in detail. If the printability of UV inks were equal to that of conventional offset ink, this ink would be close to an ideal ink. This work was under taken so as to compare the properties of ultraviolet ink with conventional offset ink. The inks selected …

A Quantitative Examination Of A Particular Set Of Process Inks To Determine The Effect Of Color Sequence On The Ink's Hue And Saturation Characteristics, Philip Giammatteo

Theses

The purpose of this study is to determine if there is a proper press sequence for a specific set of process inks on a specified type of paper. In the past, the literature on this subject has been of a qualitative and generalized nature. This study attempts to put the matter on a quantative basis under strict controls. A standard set of process proofing inks for web offset are chosen to be printed onto a coated type of offset paper by an IGT Printability Tester. Various techniques are devised for printing solid strips of the inks with minimum density variation …

The Relationship Between The Relative Legibility Of Textual Material And Resolving Power In A Microphotographic System, John Compton

Theses

The application of microphotographic methods for the processing and storage of information has grown steadily during the last two decades. The microphotographic system, through which the information must pass at a minimum is as follows: Step 1: Photographing of the original document at a large reduction onto a silver halide microfilm. Step 2: Duplicating through contact printing onto a non-silver photographic material. Step 3: Second generation duplication onto a nonsilver photographic material (This image may be used on a microfilm reader). Step 4: Enlargement of the second generation duplicate to give a hard copy print. One of the main objectives …

An Integrated Approach For The Design Of A New Braille Printing System, Albert Barzilai

Theses

The braille production system is a slow and antiquated process. The end product is expensive, heavy, and bulky. A new, more efficient braille production system was designed, using computerized transcription, thermographic printing, and automated binding and finishing. Computerized transcription programs are readily available from a variety of sources; automated binding and finishing is a common feature of modern printing technology. A series of experiments was performed to evaluate the physical qualities of the braille cells produced by thermography. An internal tearing resistance test and machinability test were also performed to study the effect of heat on the paper stock. The …

Image Mechanisms In Screenless Lithography, Charles Martin

Theses

In conventional lithography, a halftone screen is used to photographically convert the continuous- tone image of the original into a grid of very small, closely spaced dots of constant density but varying areas. Screenless or continuous-tone lithography is a printing process capable of reproducing images with gradated tones without the use of a halftone screen. Screenless lithography has a high quality potential because it has few of the inherent problems that limit the quality of the halftone process. This thesis investigates the image mechanisms in screenless lithography and in particular the role of variable water receptivity. It was hypothesized that …

Imagery Of The Subconscious, Thomas Petit

Theses

None provided.

The Landscape, 1975, John Cox

Theses

None provided.

Studies Of The Characteristics Of Different Grained Surfaces On Some Typical Lithographic Wipe-On Plates, Porntawee Pungrassamee

Theses

Four different types of grains of wipe-on lithographic plates (mechanical grains, a chemical grain and an electrolytic grain) were studied. The experiments were divided into two parts. The first part concerned surface characteristics of the grained plates, and the second one involved plate performance on a press. The grained plates' characteristics, including coarseness, gloss, directionality and depth of grain, were examined mechanically, optically and visually. The limitation of each method was discussed. The effects of the surface structures on coating thickness were reported. The experiments on the press were designed to find which grained plate produced the best printing qualities, …

The Effect Of Blue Base Tint On The Sensitivity And Acutance Of X-Ray Films, Michael Klein

Theses

An experiment was devised to quantitatively measure the effect of blue base tint (inherent in most medical x ray films) on the sensitivity and acutance of an x ray film. Results showed no significant difference due to the blue base tint for sensitivity. However, a significant difference was found for the base tint's effect on acutance of an x ray film. It was determined that the difference in acutance was due to an "anti–halation effect" of the blue base dye.

Steady State Heat Transfer From A Double Ring Of Identical Spheres In A Regular Orientation, Evelio A. Melo

Theses

Solutions to Laplace's equation are obtained by the method of reflections for the problem of heat transfer from two parallel rings of spheres arranged in regular polygonal arrays. The mathematical models developed describe the rate of heat transfer and spatial temperature distribution due to an arbitrary number of identical spheres of equal surface temperature correcting Fourier's heat transfer equation for the interference caused by a multiparticle array. Although the method of solution is quite rigorous and can be used to obtain as accurate a solution as desired, only the second reflection was obtained, yielding a first order correction. The model …

Soluble Surfactant Effects On Gas Absorption Of Organic Compounds, Angelo C. Morresi

Theses

A literature search dating back to the beginning of this century turned up no previous work similar to ours. We discuss several methods and experiments involving the scrubbing of air streams.

The objective of this work was the determination of surfactant affects on the solubility of certain organic compounds of varying solubility in water. A means of simulating a packed tower was devised to allow for bench scale evaluation and thus enabled a greater number of organic compounds to be examined with a greater variety of surfactants.

Curves were plotted based on organic vapor concentration, surfactant concentration, organic type, surfactant …

A Study Of The Vibrational Spectra Of Some Monosubstituted Benezene Derivatives Of Group Via Of The Periodic Table, Fawzi S. Rasheed

Theses

The vibrational frequencies for (C₆H₅)₂Se, (C₆H₅)₂Te, (C₆H₅)₂Se₂, (C₆H₅)₂Te₂, (C₆H₅)₂Hg, and (C6H5-Se)₂Hg are completely assigned and are consistent with the vibrational assignments for (C₆H₅)₂O, (C₆H₅)₂S, and (C₆H₅)₂S₂ previously reported. Further, whereas (C₆H₅)₂O and to a lesser extent (C₆H …

A Kinetic Study Of Lysine And Lysine Derivatives, Stephen Joseph Stanley

Theses

The kinetics of the reaction of iodoacetamide with lysine, polylysine, N-α-Acetyl lysine, and N-ε-Acetyl lysine, have been studied. The investigation was done at 23° C ± 123° C, as a function of pH, and concentration. In all cases it was noted that the rate of reaction increased as the pH increased. The rate data was analyzed in order to obtain the second order rate constants. In addition, the effects of the reactive site's environment on the rate was demonstrated.