Digital Commons Network^™

Sculpture With Reflective Surfaces, Joseph S. Spannuth

Theses

Not Included

Noise Power Ratio Testing Of Multichannel Single Sideband Communication Equipment, Per Vinther

Theses

It is shown, that Noise Power Ratio (NPR) testing of multichannel Single Sideband (SSB) transmitters should be performed loading all channels with identical white, gaussian, zero-mean noise signals in order to obtain the worst case result. A theoretical analysis of bichannel equipment under the two different input conditions: (a) statistically independent noise signals, and (b) statistically dependent noise signals; shows that the intermodulation distortion on the output of the transmitter is the same for either case. This result is extended for an arbitrary number of channels to the point of showing that the test results obtained for statistically dependent noise …

Selected Poems Of Robert Frost, Peter Basti

Theses

Not provided.

The Modulation Transfer Function Of The Human Visual System At Selected Spectral Frequencies, George L. Ayers

Theses

The Modulation Transfer Function of the human visual system has been determined with a sin usoidal test target, by measuring the threshold contrast as a function of spatial frequency, for monochromatic light of constant average luminace. Data were obtained for a broad band range and wavelengths of 538 and 617 nm. It is shown that a maximum MTF occurs at frequencies between 2 0 - 3 0 cycles/mm on the retina and that this sensitivity decreases for both lower and higher frequencies. Small but discrete differences appear in the curves for broad-band radiation and the green and red filtration at …

Application Of S-Parameter Techniques To Amplifier Design, Frank Sulak

Theses

1. Discussion of s parameters and their applicability to high frequency design. 2. Measurement of s parameters and evaluation of stable operating regions. 3. Synthesis of high frequency transistor circuitry with the aid of scattering parameter design equations. 4. Verification of design theory by evaluating the performance of bread-board models.

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.

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. …

Empty Environments, Dorothy Zinker

Theses

None provided.

Cantilevered Chairs, William Alvut

Theses

None provided.

Environmental Relationships, Michael Cotsworth

Theses

None provided.

The Black Man And The American City, Gene De Prez

Theses

None provided.

The Individual Piece, Edward Jajosky

Theses

None provided.

Figure And Environment, Carol Davis

Theses

None provided.

Series Of Modular Paintings, Kenneth Bliss

Theses

None provided.

Functional Forms In Polyurethane Foam, Ian Walker

Theses

Not Included

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 …

Premix Molding Compounds : The Effect Of Processing Technique On Profitability And Product Integrity, Albert Robert Kurkowski

Theses

Premix molding compounds, presently manufactured in a double-armed blade kneader mixer, can now be prepared by a new and unique method utilizing a high speed densifier. Compounds processed in a kneader mixer, by virtue of its overlapping, shear mixing motion, are extremely susceptible to glass fiber degradation and. consequent mechanical strength reductions in moldings. Previously, as this was the only equipment, available with the capability to admix highly viscous materials, processors would formulate and design to compensate for the resultant property reductions that are encountered. Also typical of conventional kneader mixer processes is an inherent materials handling problem and mixing …

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 …

A Correlation Of Latent Heats And Densities Of Pure Organic Liquids From Known Vapor Pressure Data, Vincent J. Vasta

Theses

Employing the correlation developed by Kemme (5), which is based on a hole model for a liquid, relating vapor pressures with corresponding liquid densities and the number of carbon atoms in a molecular chain for a homologous series, correlation coefficients were established using multi-linear regression analysis on available literature data. This correlation was newly applied to several straight chain homologous series including the n-acids, formate esters and n-alkyl benzenes.

A second correlation developed by Kemme (5) relating vapor pressure, internal heat of vaporization and the number of carbon atoms for a homologous series was employed to determine correlation coefficients for …

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 …

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. …

The Effect Of Nitrilotriacetic Acid Upon The Biodegradability Of Linear Alkyl Benzene Sulfonate, John D. Mckenna

Theses

The effects of trisodium nitrilotriacetate (SKTA) and sodium tipolyphosphate (STPP) upon the biological degradation of linear alkyl benzene sulfonate (LAS) ware experimentally investigated by the chemical oxygen demand and methylene blue methods. It was found that when STPP was present with LAS, the degradation of the LAS was better than when alone in solution. It was also found that LAS in solution with SN TA was less degradable than LAS alone. The benzene ring of the MS appeared to degrade after most of the linear portion of the chain had already been degraded.

Realization Of Transfer Impedances Using Distributed Rc Elements In A Common Ground Linvill Configuration, Walter Woronka

Theses

One of several synthesis procedures available for the realization of a transfer admittance is that of Linvill. This synthesis procedure employs an active element, a negative impedance converter (NIC), to shift the poles of passive immittance functions from the negative real axis into the complex plane to realize the desired transfer immittance function.

The Linvill synthesis procedure is extended to networks containing cascaded distributed RC elements and the conditions which must be satisfied to realize a transfer impedance using these distributed elements are defined.

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.

Environmental Sculptural Furniture And Furnishings, Bobby Falwell

Theses

Not Included

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

Theses

None provided.

Thin-Layer Chromatographic Separations Of Cycloketone 2,4-Dinitrophenylhydrazones, Robert Slentz

Theses

Ten cycloketone 2,4-dinitrophenylhydrazones have been chromatographed by thin-layer techniques using Eastman Chromagram sheets coated with silica gel and developed with benzene in Eastman sandwich apparatus. Good separations of all test compounds from binary mixtures with the standard cyclohexanone 2,4-dinitrophenylhydrazone are reported as well as good separations of more complex mixtures of the test compounds. Lack of precision is noted despite a rigorous standardized procedure. Evidence is offered that chromagram sheets differ in adsorbent activity.

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. …