Digital Commons Network^™

The Design, Construction, And Operation Of A Conducting Field Analog Computer., Richard T. Johnson

Masters Theses

"The purpose of this investigation is to design and construct a simple conducting field analog to solve problems described by the two-dimensional Poisson or Laplace equations. Decisions concerning choice of conducting media, construction of problem models, and design and construction of a specialized power supply with instrumentation were based on the results of previous experiments. Several problems are solved using the designed apparatus. Partial solutions to these problems are displayed in graphical form.

The greatest deviation of the experimental results from iterative values was consistently less than 8%. In most cases the deviation was less than 6%. The console arrangement …

The Submerged Culture Of Thiobacillus Thio-Oxidans In A Pilot Scale Fermentor, Edward Hibbert Crum

Masters Theses

"A strain of Thiobaci.llus thiooxidans was isolated from a West Virginia coal mine drainage. This strain was characterized by its production of sulfuric acid in shake flasks. The strain was also compared with a pure culture of h thiooxidans obtained from the American Type Culture Collection (ATCC number 8085).

The strain was grown in submerged culture in a 16-liter pilot scale fermenter. Two aeration systems, air and air enriched with carbon dioxide, were examined. The air enriched with carbon dioxide gave a much more rapid growth rate. The culture reached the mid-log phase of growth after 80 hours of incubation …

The Anodic Dissolution And Disintegration Of Gallium And Aluminum And The Initial Valency Of The Ions Entering Aqueous Solutions., Kenneth Anderson Poush

Masters Theses

Gallium dissolved very slowly in dilute acids like HC1, H₂SO₄and HCIO₄. The rate was substantially accelerated if the metal was connected with a platinum electrode in the same solution. From the volume of the hydrogen developed the trivalency of gallium ions going into solution was calculated. This same ionic charge was obtained from coulometric measurements using gallium-amalgam as the anode. The initial ionic charge of aluminum dissolving from an aluminum amalgam anode was evidenced as being plus three by coulometric measurements.

Gallium and aluminum anodes were found to partially disintegrate while the current flowed. …

Separation Of Cationic And Colloidal Fractions Of Radioactive Fission Elements By Electrodialysis., Ronald Dean Mitchell

Masters Theses

"The rapid increase in radioisotope applicat i ons necessitates improved technology for separation and purification of the fission product elements. Electrodialysis techniques employing Permutit anion exchange membranes (3148) and cation exchange membranes (3142) were used to separate strontium from cesium and to fractionate cerium from promethium. The methods were based upon organic complex formations in basic solution.

Separations of radio strontium and radio cesium were affected with both anion and cation exchange membranes in a three-cell electro dialyzer with EDTA as a chelating agent at a pH of 11.0o Fractionation of radiocerium and radio promethium were affected with anion exchange …

Investigation Of The Effect Of The Wall Thickness On The Residual Stresses Developed In Thick Wall Cylinders Due To Water Quenching From The Outside Surface., Ghanshyam Chandubhai Patel

Masters Theses

"This investigation has been made to determine the residual stresses in thick wall cylinders by the use of strain gages.

The cylinders were quenched from their outer surface i n water from a temperature of 1000°F, and the resulting residual stresses were determined by Sachs boring-out method. The effect of the wall thickness of the cylinders on the residual stresses and the error developed due to the boring operation were discussed"--Abstract, p. ii

The Dissolution Of Deformed Magnesium In Sulfuric Acid., William J. Daniels

Masters Theses

"The negative difference effect exhibited by magnesium while anodically dissolving in saline solutions has been attributed in part by Kokoulina and Kabanov to the expulsion of univalent magnesium ions ^{1, 2}. Recent experimenters have discounted the concept of the anodic expulsion of uncommon valency ions and have explained both the positive and negative difference effects observed for magnesium in dilute acids on the basis of anodic polarization, film disruption, and disintegration of the magnesium anode, i.e. "chunk effect"^{3, 4}.

The purpose of this present investigation was to study the difference effect for deformed magnesium in a dilute …

A Laboratory Study Of The Effect Of Wettability Of Residual Oil Saturation In Artificial Cores., Socrates Nicholas Potamianos

Masters Theses

"In the past much emphasis has been placed on various studies of reservoir rock and fluid surface properties and their relation to the different oil recovery processes. Several laboratory methods (1, 2, 3) ^l/have been used by different investigators to obtain a more fundamental understanding of the many factors which have an influence on the oil recovery from reservoir rocks"--Introduction, p. 1

Design, Construction And Characterization Of A 10-Liter Batch Pilot Plant Fermentor., Sylvester Ogden

Masters Theses

"A 10-liter batch type pilot plant fermentor has been designed and constructed. The design incorporated most of the desirable features of previous designs reported in the literature.

The stainless steel fermentor has a multi-speed agitator and aeration rates as high as 15 cubic feet per hour. Temperature indicating, temperature controlling, pH measuring, and automatic foam controlling systems are included in the design.

Sulfite oxidation rates have been determined for the unit at 15 operating conditions. A maximum sulfite oxidation rate of 1060 millimoles of oxygen per liter per hour has been obtained.

Fermentation using a Torulopsis utilis yeast culture has …

The Anodic Dissolution Of Cadmium In Aqueous Solution, Yun-Chung Sun

Masters Theses

"The increasing importance of prevention of corrosion in industry has stimulated extensive studies on the fundamental behavior of metals in corrosive media.

The basic mechanism of the anodic dissolution of metals such as cadmium, magnesium, and zinc in salt solutions is not completely known. Several mechanisms have been proposed by different investigators, but evidence is still lacking to draw unquestionable conclusions to explain the discrepancies which often arise between coulometric data and weight loss of metal electrodes in certain salt solutions.

The purpose of this investigation was to obtain experimental data for anodic dissolution of cadmium in various electrolytes and …

Sonic Flow Meter., Daniel E. Wilson

Masters Theses

"The purpose of this thesis was to construct a device to measure the velocity of air employing sound waves. The principle of operation of the device is that the time interval required for the sound wave to travel between two points in the duct is a function of the fluid velocity. This time interval was measured both with the air flowing and with the air stationary. An equation was derived such that the mean velocity of the flowing air could be calculated by knowing the two-time intervals.

The mean velocity determined by this device was compared to the mean velocity …

Theoretical Investigation Of Steam Jet Cleaning, Jaswant T. Lotwala

Masters Theses

"Steam cleaning methods are used by industries to remove mass of dirt and grease deposits from machine parts and other surfaces. It is necessary to know the rate at which this mass can be removed from a surface. The present investigation was made to determine this rate of mass removal. The mass transfer rate is influenced by two phenomena; namely, heat transfer and momentum transfer. Both of these were discussed and the results obtained from the analysis were used in determining the total mass transfer rate. The effects of various parameters, such as density and velocity of the cleaning fluid, …

Anodic Dissolution And Disintegration Of Indium, Thallium, And Indium-Cadmium Solid Solutions And Valency Of The Ions Going Into Solution., Richard Lloyd Martin

Masters Theses

"Indium was found to form only In⁺³ ions when dissolving anodically in aqueous acid solutions. Thallium dissolves anodically in acid solutions giving Tl⁺¹ ions only. The reason why Faraday's law is not being formed is that the anode undergoes partial disintegration producing small metallic particles.

Disintegration of these anodes depends on several factors: the nature and concentration of the corrosive medium, the surface condition of the anode, the current density, and the temperature of the corrosive solution. Disintegration may be due to different mechanisms depending on the nature of the electrolyte" -- Abstract, p. ii

The Irish Plumber And Heating Contractor, December 1963 (Complete Issue)

Building Services Engineering

No abstract provided.

Test 855: Allis-Chalmers D-21 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Analysis Of The Transient Response Of A Flat Rotating Disk By Generalized Transforms, Kenneth Wayne Chase

Theses and Dissertations

The object of this thesis was to lay a foundation for a comprehensive study of the dynamic response of rotating members. This initial phase of the study includes a theoretical investigation and proposes experimental techniques for the determination of the stresses and strains in a thin, rotating disk with a concentric hole, subjected to transient shaft inputs. There are many practical applications of this problem including computor memory storage disks, turbine rotors, grinding wheels, saw blades, gears, optical reflectors, and solar sails for space vehicles.

Pc 315/1-1-63, Characteristics Of U.S. Vessels, Vehicles, And Equipment For Amphibious Operations, September 1963, Defense Intelligence Agency Production Center, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

The cover and the forward claim that PC 315/1-1-63 is a publication of the, then new, intelligence Production Center of the Defense Intelligence Agency.

This appears to be an excellent technical-intelligence type document about American weapons and equipment. It could just as easily be a product of Soviet military intelligence. It contains descriptions and illustrations about various categories of landing craft and equipment. The categories of material covered include:

• Landing Craft
• Landing Ships
• Amphibious Vehicles
• Support Ships (including command ships and fire support ships) and
• Auxiliary equipment

The appendices contain information about:

• The capacities of various types of craft
• Comparisons …

6th Annual Rocky Mountain Spectroscopy Conference Abstracts Of Papers

Rocky Mountain Conference on Magnetic Resonance

Abstracts of papers presented at the 6th annual meeting of the Rocky Mountain Spectroscopy Conference, sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Denver, Colorado, August 12-13, 1963.

Heat Flux Measurement By Miniature Calorimeters, Gary Rex Coffin

Theses and Dissertations

During recent years an increasing number of technical firms and manufacturers have begun to specify heat flux, energy input per unit area per unit time, as a testing and designing criteria. This change in the boundary condition (to heat flux from temperature excess or others) evolved from the idea that each material has a characteristic burning temperature. Therefore, the rate of ablation or burning depends mainly upon the rate of energy input into the specimen, and not its temperature. Thus, the need for a flux measuring device became more acute.

The Corrosiveness Of Phenols, Edgar George Kaup

Theses

The effects of oxidizing agents, heat, light, and metallic catalysts on coloration in phenols is discussed, using data collected from the literature. The oxidation reaction is concluded to be the con-trolling factor in coloration. Corrosion data from laboratory experiments, field tests, and operating plants is presented for metals and non-metals in concentrated phenolic systems.

Slow Compression Crushing Of Glass In Fluids, Peter Joseph Lucchesi

Theses

Generally only a small fraction of the energy used in crushing, on the order of 1 or 2%, appears as new surface energy in the product. The purpose of this work was to determine if higher efficiencies could be achieved by the use of different fluids surrounding the particle during crushing.

Single particles of solid glass cylinders, standing on. end, were crushed by slow compression in the presence of air, water, methanol, carbon tetrachloride, and glycerol. No effect was found with the various fluids even when considerable pressure was developed in the surrounding fluid in some of the glycerol experiments. …

B-147-63, Computation Of Outflow From Breached Dams, June 1963, Defense Intelligence Agency, Production Center, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

This guide contains detailed instructions for computing the outflow from breached dams supplemented by extensive tables and charts. The preface state that the document “contains intelligence which is not readily available through other media required for the accomplishment of the assigned mission of the Production Center and of interest to other agencies.

Increased Corrosion Of A 304 Stainless Steel Upon Bending, William C. Tiddy

Bachelors Theses and Reports, 1928 - 1970

No abstract provided.

Identification Of Nonmetallic Inclusions In Armco Ingot Iron With Polarized Light, Frank E. Panisko

Bachelors Theses and Reports, 1928 - 1970

No abstract provided.

On A Highway Built By You, Ben West

Kentucky's Annual Forum on Transportation

No abstract provided.

A Model Investigation Of The Water Coning Phenomenon., Gary L. Downey

Masters Theses

"Results and procedures are presented covering the design and construction of a dimensionally scaled model of an oil reservoir and its use in investigating the problem of water coning. The theoretical considerations involved in the analytical solution of the water coning problem and the methods used in constructing, designing, and operating the above model are presented.

Four water coning experiments have been completed using the model. Three of the four runs have produced significant results. The information obtained from these experimental results have shown that the laboratory model is well suited for investigating oil reservoir problems such as water coning …

Permeability And Adsorbed Flow Of Carbon Dioxide And Propene Through Porous Silica., Jorgen Lovland

Masters Theses

"It has been known for over a century that gases diffuse through some porous barriers at a rate inversely proportional to the square root of the molecular weight. The difference in diffusion rate can obviously be used to separate gases with different molecular weight. Since other methods for separation like distillation and adsorption usually are simpler and cheaper, separation by gaseous diffusion has found few practical applications. One notable exception is the separation of the gaseous hexafluorides of u²³⁸ and u²³⁵.

Later investigations on the permeation of gases through porous materials have shown that when gases diffuse …

Dissolution Rates Of Zone Refined Iron And Steel In Hydrochloric And Sulfuric Acids And In Sodium Chloride Solutions., Gary E. Welch

Masters Theses

"Dissolution rates for two carbon steels were deter­ mined in four concentrations of sulfuric acid at five temperatures and in four concentrations of hydrochloric acid at four temperatures.

No general relationship was found for the variation in activation energies in sulfuric and hydrochloric acid. An explanation of the difference in the reaction rates and a possible explanation of the activation energy is presented on the basis of chunk formation.

The results of this investigation indicate an electrochemical control mechanism for the dissolution reaction of steel in acid solutions.

Results of dissolution rate studies in sulfuric and hydrochloric acid solutions and …

Heat Transfer Through A Honeycomb Sandwich Panel, Jayantilal J. Darji

Masters Theses

"Progress brought about by human ingenuity and technological developments has been always accompanied by fresh problems, the successful solution of which enables still further progress.

The recent developments in space exploration and exploitations are astounding. The coming years are likely to bring forth many remarkable achievements. Except for several engineering problems encountered with these developments the pace of progress is to study the heat transfer from honeycomb sandwich panels as an outer skin of high performance flight vehicles. The quantity of heat transferred through the panel is important in study of such vehicles, and methods or equations for determining this …

Swelling Properties Of Putnam Soil, Oscar M. Palma

Masters Theses

"Volume change of Putnam soil under different moisture contents and the swelling pressure developed by the soil at the same moisture contents were investigated using standard test procedures.

The theory of one dimensional consolidation of Terzaghi was reviewed as well as the literature on swelling and swell pressure.

It was found that swell depends mainly on the initial water content, while swelling pressure depends mainly on the dry density of the soil"--Abstract, page ii.

The Construction And Evaluation Of A Small Scale Laboratory Fermentor For Batch And Continuous Studies., Robert Murray Logan

Masters Theses

"The purpose or this investigation was to design and construct a suitable apparatus for the aerobic culture or microorganisms to be used for preliminary batch studies and eventually, continuous fermentations.

The general design of the apparatus was patterned after small scale equipment described in the literature. Construction or the apparatus was carried out in the shop of the Department of Chemical Engineering and Chemistry. All of the necessary machining was done by the author.

The aeration-agitation system was evaluated by the use or the sulfite oxidation rate determination. The oxygen transfer rate provided by the apparatus was round to be …