Digital Commons Network^™

Pattern Recognition By Means Of Electric Stimuli, Melvyn Kreitzer

Theses

None 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 …

Environmental Relationships, Michael Cotsworth

Theses

None provided.

The Black Man And The American City, Gene De Prez

Theses

None provided.

Figure And Environment, Carol Davis

Theses

None provided.

Functional Forms In Polyurethane Foam, Ian Walker

Theses

Not Included

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 Effects Of Air-Water Two Phase Flow On The Performance Of A Centrifugal Pump, Karnig Ekizian

Theses

This study investigates the performance of a 1-inch long 4-vane open impeller centrifugal pump under two phase flow conditions. The paddle wheel pump, as branded by its manufacturer the Worthington Corporation, had a specific speed of 3400 (based on gallons per minute, feet of water and revolutions per minute) corresponding to a 7-inch impeller diameter. A 1/8-inch perforated steel pipe carried the compressed air to within four inches of the impeller eye where the air was injected into the water stream (See figures 18 and 20).

The three variable inputs were, water flow rate, pump speed and air flow rate. …

A Study Of The Properties Of The Biconical Antenna, Kurt Frank Hafner Jr.

Theses

Expressions are found for the fields produced by TM and TEM modes along a finitely conducting biconical antenna. Expressions are also found for the TM and TEM fileds along a biconical antenna having a lossy dielectric coating. It is shown that the antenna losses produce an anntenuation of the the fields along the antenna. It is found that because there is a dispersion of the fields along the biconical antenna, the attenuation produced by the losses is, in genaral, not characterized by simple exponential.

A solution is obtained for the fields of the TEM wave along a biconical antenna coated …

Coagulation In Waste Water Treatment, Garret P. Westerhoff

Theses

This paper emphasizes a practical approach to the coagulation of domestic waste water. A portion of the paper is a synopsis of current published literature on the subject. Laboratory studies on the coagulation of raw domestic waste waters were conducted to provide the basis of a practical procedure for the evaluation and design of a coagulation process. Studies included the development of a relationship between the B.O.D. and the soluble and solids portion of two waste tests. The jar test was used for the studies on the coagulation process. The final section of the paper outlines the chemical cost factors …

Borderline Imagery In Painting, Emery Bopp

Theses

None provided.

Analysis Of The Performance Of The Pressurized-Water Nuclear Reactor By Electrical Simulation - Analog Computer, Philip Bartells

Theses

This thesis demonstrates a method of analog simulation of a Pressurized-Water Reactor (PWR) using simplified techniques. The simulation is for the reactor vessel and is patterned after the "Yankee," the PWR owned and operated by the Yankee Atomic Electric Company of Rowe, Massachusetts, and built by the Westinghouse Corporation of Pittsburgh, Pennsylvania. The entire analysis is based on the one group model (postulated that neutrons in the reactor are of one energy). The areas analyzed are: 1. Reactor kinetics - one delay group 2. Temperature effects on reactivity A. Fuel temperature coefficient B. Moderator and coolant temperature coefficient. 3. Control …

Thermal Conductivity Of Mixtures, Paul Joseph Orosz

Theses

A concentric cylinder type cell was designed and constructed tp measure thermal conductivity of liquids. The materials of construction were stainless steel and teflon, so that a wide variety of liquids could be tested.

The systems studied were aqueous solutions of methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, and tertiary-butyl alcohol. Thermal conductivity was studied as a function of composition.

The data obtained were fitted to quadratic equations by least squares analysis. For each system, an equation of the following type was obtained:

k_L = A + Bx_A + Cx_A²

where k_L is thermal …

The Frequency Response Analysis Of A Reboiler-Condenser Under Condensate Control, Douglas F. Ready

Theses

In this investigation, the dynamics of a reboiler-condenser pair, with the reboiler operating under condensate control, were analyzed both theoretically and experimentally, and the results of the two analyses compared.

The theoretical analysis was performed using the standard method of Laplace transform transfer function synthesis.

The experimental study consisted of a frequency response analysis of the system response to sinusoidal variations of the steam condensate rejection rate.

Two mathematical models were developed, one quite rigorous but extremely cumbersome, the other neglecting all but the most important factors for the sake of simplicity.

The experimental data (in the form of Bode …

Potassium T-Butoxide-Initiated Elimination On Substrate 1,1,2-Trimethoxyethane, James Waldron

Theses

1-bromo-2,2-dimethoxyethane (I) was prepared in 68% yield from the addition of bromine to a solution of vinyl acetate and methanol. A Williamson ether synthesis, using sodium methoxide in methanol and I, gave 1,1,2-trimethoxyethane (II) in 48% yield. The compound (II) was the desired substrate for elimination reactions because it contains poor leaving alkoxide groups.

Many different reactions were investigated to convert II into 1,2-dimethoxyethylene. Among these were pyrolysis, acid catalyzed eliminations, and base initiated elimination reactions.

Best results were obtained using a bomb reactor, compound II as substrate, and potassium t-butoxide as the base. From this reaction, tertiary-butyl methyl ether, …

The Three-Dimensional Painted Construction, William Phelan

Theses

None provided.

A Sculptor's Approach To The Design Of Aesthetically Functional Furniture, David Warner

Theses

Not Included

The Use Of Ektacolor Paper As A Pre-Press Color Proof, Keith Erb, John Suter

Theses

To test the usefulness of Ektacolor Professional Paper as a pre-press color proofing method, one set of three predictor equations for each of the four primary printing inks was derived relating additive exposures on Ektacolor to colorimetric solid ink densities. These relationship would not yield to simultaneous solution.

Chromaticity coordinates of several sets of solid inks were matched on Ektacolor with an error of 2-10 MacAdam noticeability units. Probably because of the differences in surface characteristics of Ektacolor and newsprint, a visual match was not achieved.

Ceramic Fountains, Tarrant Hookham

Theses

Not Included

Creative Applications Of Photographic Media For Industry And Architecture, Francis Ho

Theses

None provided.

Automatic Merchandising, D. Kenneth Winebrenner

Theses

Not provided.

The Determination Of A Set Of Alphanumeric Characters Of Equal Recognizability, Keith C. Donaldson, Harry O. Gough

Theses

An experiment is described whose objective was to determine a set of alphanumeric characters of equal recognizability. Constraints were that the characters be similar in aspect ratio to the conventional tri-bar target, i.e., 5:1, and that they and the surround have a low density difference. Such a set is described, together with the experimental technique and data analysis used by the present authors to evaluate the set. At an alpha risk of 0.10 the set of characters E S 2 3 8 9 was found to have equal recognizability under two varied viewing conditions.

Birds As A Source Of Pictorial Creativity, Sylvia Bornarth

Theses

None provided.

Exploration Of A Corporate Image: "In The Visual Perspective", H. Clapsaddle

Theses

None provided.

Direction, Joseph Antinore Jr

Theses

None provided.

Drawing And Painting: Reinterpretation Of Far Eastern Miniatures, James Bracy

Theses

None provided.

Investigation Of The Octene-Decane-Urea Adduct Equilibrium System, Frederick Charles Guest

Theses

Concentrations of equilibrium mixtures formed by adding increments of octene to a solution of urea in methanol to form adduct are reported.

Calorimetric studies indicate that the addition of octene to a urea-methanol solution shows an endothermic heat effect prior to the formation of solid adduct. The heat effect becomes exothermic as solid adduct is formed.

Addition of decane to an equilibrium octene-urea adduct system increased octene concentration in the supernatent liquid, indicating an octene release from the original adduct as decane adduct was formed.

The order in which decane and octene were added to form the decane-octene-urea adduct system …

Fabrication Of Molds And Fiber Glass Forms For Furniture, Douglas Sigler

Theses

Not Included

An Investigation Of The Mechanism Controlling The Co-Deposition Of Aluminas With Copper During Electrodeposition Of Copper, James Edward Hoffmann

Theses

Experimental work was undertaken to determine the mechanism controlling the co-deposition of aluminas with copper during electrode-position of copper. The aluminas were present in the copper plating electrolytes as an insoluble disperse phase.

Three possible mechanisms for co-deposition of aluminas were studied, They were mechanical inclusion, electrophoretic deposition, and adsorption.

The results of experimental studies established that mechanical inclusion was not a significant factor in the mechanism controlling co-deposition of aluminas with copper.

Theoretical considerations of the compositions of the copper plating electrolytes indicated that co-deposition of aluminas by an electrophoretic mechanism was highly unlikely. The conclusions arrived at by …

Planning And Scheduling Software Programs With Pert, Henry E. Mielo

Theses

The use of the Program Evaluation and Review Technique (PERT) in planning and scheduling software programs was discussed in this thesis. A real world program, referred to as the Wrap-Around Simulation or WAS Project, was selected to illustrate that complex efforts in the software domain can respond favorably to modern planning and scheduling techniques

The WAS Project included the provision of a digital simulation of the shipboard environment in which a Digital Fire Control Computer (DFCC) would operate as part of a Digital Fire Control System. The digital simulation afforded a well controlled and conclusive checkout of the operational program …