Digital Commons Network^™

Pattern Recognition By Means Of Electric Stimuli, Melvyn Kreitzer

Theses

None provided.

Covered Containers And Serving Pieces, Robert C. Palusky

Theses

None provided.

A Geometric/Symmetric Series, Charles Zuill

Theses

None provided.

Aerial Oxidation Of Lith Developers, Joe Smith

Theses

Lith developers, unlike conventional developers, lose alkalinity when aerially oxidized. This is attributed to the alkaline reaction of the formaldehyde-bisulfite compound (FBS) commonly employed in lith developers as a "sulfite buffer". Conventional chemical analysis methods are used to obtain data and experimentally derive an equilibrium constant for the alkaline disassociation of FBS. Chemical and sensitometric data are presented that indicate that the alkalinity loss contributes significantly to the overall loss of developer activity. It is also shown that aeriating a lith developer quantitatively converts hydroquinone to hydroquinone monosulfonate that, in turn, is a measurably active developing agent. Additional data are …

Slab Construction In Earthenware, Edward Myron Mcendarfer

Theses

None provided.

The Inhibition Of Aerial Fog, John Levisky

Theses

None provided.

Computer Specification Of Centrifugal Pump And Motor, Paul David O'Lenick

Theses

The purpose of this thesis is to develop a PORTRAIT computer program for selecting a centrifugal pump and motor driver. This is accomplished by means of generalized data which establishes the speed of the Dump and its power requirement. After selection of the pump, the motor is sized and specified. In addition to determining the pump and motor, the program also sizes the discharge and suction lines and the required control valve. The resulting solution yields the pump design data, motor, line and control valve sizes. From this data utility and relative equipment costs can be estimated.

Ink Film Thickness And Its Relation To Dot Size In Photo Offset Lithography, Richard J. Byer

Theses

The relative ink film thickness of screen tints compared to nearby solid printing areas of two grainless lithographic plates were measured for dot areas from 45% to 95%, using a photometric technique of measuring the relative quantity of ink on a known area of the plate. Four different screen rulings were used - 65 I/in., 150 1/in., 300 1/in. and 500 1/in. It was found that there is no correlation between dot area and ink film thickness for the dot areas from 60% to 95% for the three coarser screens and from 75% to 95% for the 500 1/in. screen. …

Polychromatic Mtf Of A Pinhole Camera, Arthur Messenger

Theses

Polychromatic MTFs based on the work of Hopkins and Sayanagi are developed for a pinhole camera using standard 5500°K daylight and a black and white, and a color reversal film. On and off-axis MTF were developed for the radial and tangential cases. Conclusions are drawn about the depth of focus and "best" focal position. A monochromatic depth of field study was done, showing both the need to focus and the infinite character of the pinhole camera.

Sculpture With Reflective Surfaces, Joseph S. Spannuth

Theses

Not Included

Empty Environments, Dorothy Zinker

Theses

None provided.

Environmental Relationships, Michael Cotsworth

Theses

None provided.

The Black Man And The American City, Gene De Prez

Theses

None provided.

The Plasticization Of 4-Methyl-Pentene-1 (Tpx-Rt-D30) Polymer With Petroleum Jelly, Joseph P. Mccann

Theses

The properties of TPX-RT-D30 (4-methyl-pentene-1 polymer) have been changed by blending petroleum jelly with the polymer. The polymer was blended in a Brabender apparatus with up to 40% by weight petroleum jelly (P.J.) at 270°C, pressed and quenched in water. Samples were die cut for the various tests. The polymer tensile properties (ASTM-638-64T) showed both a break and yield value in all ratios as compared to only a break value for the TPX-RT polymer. Breaking strength ranged from 4000 psi for pure TPX-RT down to 1000 psi at 40% P.J., with a leveling point of 2000 psi at 15% P.J. …

Critical Interaction Constants For Binary Gas Mixtures For Use In The Redlich-Kwong Equation Of State, Warren J. Biss

Theses

In this work, critical interaction constants were used to evaluate the interaction coefficients of the Redlich - Kwong constants for bin-ary gas mixtures. From these constants, the pressure - volume - temperature behavior of the mixtures was calculated using the Redlich - Kwong equation.

The critical interaction constants, T₁₂ and P₁₂ , were evaluated for binary mixtures by solving, simultaneously, two second degree equations relating terminal slopes for critical pressure loci and the mole fractions of the components present. The feasibility of this method was tested by calculating P-V-T data for binary mixtures and comparing this with values …

Effect Of Column Diameter On The Frequency Response Of Water Fluidized Beds, Edward C. Maiuro

Theses

The effect of column diameter on the frequency response of water fluidized beds was investigated.

Studies were made on four columns ranging from four to ten inches in diameter. Water was used to fluidize the beds which consisted of spherical glass beads .0185 inches in diameter. A trace solution of sodium chloride was sinusoidally introduced into the beds. Inlet and outlet concentrations were continuously measured by an electrical conductivity recorder. Separate frequency response tests were conducted on the inlet calmning section in an attempt to obtain the frequency response of this region alone. Results of the tests were expressed as …

The Optimization Of A Catalytic Methanol Reactor, Peter Wrampe

Theses

The development of a computer program which determines the minimum space time of the methanol synthesis reactants is presented. Also, the optimum temperature profile along the catalytic reactor was predicted for a desired conversion at a given operating pressure, feed composition, and catalyst effectiveness factor.

The equilibrium conversion of methanol was determined at various reaction parameters. Rates of reaction were ascertained and maximized with respect to temperature for various conversions and given reaction parameters. The results, along with those obtained when the design equation was numerically integrated, were compared to published data. Equations were established for various sets of published …

Evaluation Of An Alphanumeric Target As A Means Of Determining The "Resolution" Of A Photographic Reconnaissance System, Mark Underhill

Theses

This experiment relates three forms of resolution as predictors of recognition and identification of objects that could be of interest in a military photo-reconaissance situation. Of the three forms of resolution, two are based on existing types of resolution target currently used for assesment purposes and the third, being evaluated under this experiment, is based on a Block Letter (alphanumeric) target. The results and conclusions of this experiment will show that at a confidence of 90%, the Block Letter target provides a significantly better resolution value for the prediction of recognition and identification of the type of objects used in …

Ceramic Planters, Robert Forrest Garren

Theses

None provided.

Design In Motion: An Animated Study, David S. Porter

Theses

None provided.

A Theoretical Investigation Of Color Correction Masking For The Graphic Arts, Clarence Gutteridge Jr

Theses

The theoretical functional relationship between mask density and original red, green, and blue densities has been described for a photomechanical reproduction system. A computational model simulating the reproduction system was derived and programmed on a digital computer. Spectrophotometric curves were used as originals and the needed ink amounts to reproduce these colors were specified by a set of transformation equations. The relationship obtained by regression analysis did not completely agree with conventional masking requirements. The results of this investigation are compared with the negative photographic mask technique to investigate the inadequacies of the photographic process to give adequate masking.

Liquid Vapor Equilibrium In Nucleate And Film Boiling, Walter Henry Rothaug

Theses

Liquid vapor equilibrium data were obtained for several solutions and azeotropes under both nucleate and film boiling. The data were invariant between the two boiling regimes indicating that both nucleate and film boiling are equilibrium vaporizations rather than either diffusional or bulk vaporizations. Boiling heat transfer versus temperature data were taken in nucleate and film boiling for the solutions and azeotropes and for several pure liquids. The critical heat flux for methyl alcohol-benzene solutions rose sharply at first and then more moderately with increasing alcohol concentration. The critical heat flux was pratically constant regardless of concentration in ethyl alcohol-benzene solutions. …

Reliability Considerations For Communication Satellites, Frank Polizzi

Theses

A detailed program covering all phases of reliability for a communication satellite was presented. In long mission programs such as this one, reliability is the prime consideration in assuring a successful accomplishment of the stringent goals set forth. Reliability principles and methods were incorporated in delineating each major task in the program. These principles and methods not only aided the reliability personnel in performing their duties better, but also assisted the design group, manufacturing personnel, and the testing and evaluation group in performing their jobs efficiently by being aware and knowledgeable of reliability engineering.

Various reliability disciplines were imposed, as …

Fault Protection With A Digital Computer, George D. Rockefeller

Theses

A fundamental basis has been developed for the use of a time-shared stored-program digital computer to perform many of the electrical power-system protective-relay functions in a substation. Logic operations are given to detect a fault, locate it and initiate the opening of the appropriate circuit breakers, whether the fault is in the station or on lines radiating from the station.

The instantaneous value of the station voltages and currents are sampled at a 0.5 ms rate, converted to digital form and stored for computer main-frame use. Operating times are compatible with the 25 ms breaker trip capability of modern two-cycle …

Design Potential Of Bas-Relief By Way Of The Sabre-Saw, Christopher Focht

Theses

None provided.

Spectral Absorption And Related Spread Function Of A Photographic Layer, John Tuller

Theses

None provided.

The Thin Layer Chromatography Of Alkyl And Halogen Substituted Benzaldehyde 2, 4-Dinitrophenyl Hydrazones, Walter C. Eisenberg

Theses

The thin layer chromatographic separation of alkyl and halogen substituted benzaldehyde 2,4-dinitrophenylhydrazones has been studied using a zinc carbonate adsorbant on glass plates and a ,0% carbon disulfide-10% chloroform solvent mixture as the elutant. The halogen substituted benzaldehyde 2,4-dinitrophenyl­ hydrazones were se,arated from the standard compound, benzaldehyde 2,4-dinitrophenylhydrazone. Of the alkyl derivatives examined only 4-isopropyl benzaldehyde 2,4-d.initrophenylhydrazone separated. The adsorptive properties of thin layers of zinc carbonate and alumina were investigated and an eluotropic series for each adsorbant was established.

Color Woodcuts & Ancient Greek Poetry, Catherine Croom

Theses

Not included.

Exploration In Painting With The Airbrush, Mary Greenwood

Theses

None provided.

A Study Of Hydrogen Bonding, Mary Ann Conklin

Theses

The proton magnetic resonance technique lends itself to the study of hydrogen bond equilibria. Through PMR spectra, hydrogen bonding can be detected. The specific proton which participates intimately in the hydrogen bond may be identified. The following work has investigated hydrogen bonding systems in which the proton donor is trifluoroacetic acid and the proton acceptor is an N-heterocyclic base, such as quinazoline, quinoline, and isoquinol ine. From measurements of the chemical shift versus concentration, and from measurements of the line width at half peak amplitude versus concentration for the time average exchange signal, the extent of hydrogen bonding may be …