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Application Of Digital Computer To Magnetic Data Interpretation Using Surface Integral Method, Afif Hani Saad

Masters Theses

"A simple method is developed for the calculation of the magnetic effect due to three-dimensional bodies. The method is based on the use of surface integration instead of volume integration. Thus, any three-dimensional body can be considered as having two surfaces, upper and lower, with magnetic pole distributions. Simple equations based on potential theory have been derived for the calculation of the vertical component and total intensity due to these surface distributions of poles. The anomalous field of the body can be obtained by subtracting the effect due to one of the surfaces from that of the other.

The method …

A Study Of The Colloidal Properties Of Zirconium And Promethium By Electrodialysis And Liquid-Liquid Extraction, James N. Click

Masters Theses

"The purpose of this investigation was to study the solution chemistry of zirconium by investigating the colloidal behavior of natural zirconium and zirconium-95, utilizing electrodialysis and liquid-liquid extraction techniques. Also incorporated into this study was the investigation of optimum conditions for the extraction of the natural zirconium and zirconium-95 with thenoyl trifluoracetone. A limited amount of work was done on the colloidal nature of promethium-147"--Introduction, pages 2-3.

Syntheses And X-Ray Investigations Within The System Fes₂-Cos₂, Samuel Shu Mou Chan

Masters Theses

"Pyrite (FeS₂), cattierite (CoS₂), and various transitional members of the solid solution compounds were prepared. The methods used are as follows:

First, sulfides of cobalt, iron, or cobalt-iron were obtained by precipitation from a mixture of the cobalt chloride and/or ferrous sulfate in an aqueous solution. The dried precipitates were then mixed with an equal weight amount of sulfur and placed into silica glass tubes. After evacuation, they were filled with hydrogen gas of 3/4 of atmospheric pressure and sealed. The samples were then heated up to 500°C (for FeS₂), 650°C (for FeS_{2 …}

Analog Study Of Vibratory Forces In Sorting Machine, Navnit Chhaganlal Mehta

Masters Theses

"This investigation involves the study of the reduction of vibratory forces in a sorting machine. The equivalent masselastic system is shown in Figure 1, in solid lines. In this figure the mass m₁ represents the main structure for the mounting of the machine, the mass m₂ is the main bearing blocks and the mass m₃ is the vibrating basket. The elastic stiffness indicated as k₁ represents the mounting spring for the entire unit, the stiffness k₂ is that of the beam structure by which the bearing block is attached to the main structure, and the stiffness k₃ is that of …

A Study Of The Electro-Chemical Injection Of Ca(Oh)₂ Into Pure Kaolin Clay, Sam Michael Savas Jr.

Masters Theses

"The work presented in this thesis is the investigation and study of a possible and successful means of injecting an electrolyte solution into a fine grain soil mass with the use of electric current and to measure some of the changes of its physical properties. A NoKarb Georgia Kaolin Clay was treated by passing a preferential electrolyte solution of Ca(OH)₂ using direct current for a period of one and six days. The tests performed during this investigation included the following: (a) tri-axial tests, (b) atterberg limits, (c) pH determination, (d) moisture content change (from treatment), (e) visual settling of treated …

A Tunnel Diode Parametric Down Converter, Leland Lovell Long

Masters Theses

"The problem, as presented, is to derive analytical expressions for the conversion gain, bandwidth, and noise figure of a self excited tunnel diode converter and to verify, if possible, the validity of these express- ions by building such a converter. These analytical results are presented and discussed. The converter circuit is shown along with the resulting intermediate frequency output. Gain and bandwidth measurements are also given. It is concluded that the self excited converter could very definitely be of value as a low noise pre-amplifying device in the ultra-high frequency and microwave frequency ranges"--Abstract, page ii.

A Study Of The Stress Distribution Around Circular Openings Using Multilayered Photoelastic Material, Donald Frank Haber

Masters Theses

"Stress analysis as applied to mine openings ranges from the completely empirical to the completely theoretical. However, it is only through the ultimate utilization of the two methods that a guide to the Interpretation of mine stress phenomenon may be obtained. The bridge between the two approaches lies in the field of model study. Specifically, this is an Investigation into determining the feasibility of using multilayered photoelastic materials in models such that a more exact approximation of the underground stress distribution around mine openings can be made.

The two major objectives in this study for determining the feasibility of using …

Model Analysis By The Moiré Method, David D. Kick

Masters Theses

"This study presents the use of Moiré fringes for model analysis of deflections and strains. Deflection of a beam, strain in a disk, and an Influence diagram for a frame are presented as examples of uses of the Moiré method. The necessary equations for the determination of strain using the Moiré method are also derived and presented in this work"--Abstract, page v.

The Separation Of Germanium From Lead, Cadmium, And Zinc By Ion Exchange, Myra Sue Anderson

Masters Theses

"The object of this study was to investigate the ion exchange behavior of germanium in order to find a quantitative separation method applicable to the analysis of germanium in zinc ores.

Germanium had been predicted and described as eka-silicon by Mendeleeff, and was discovered by Winkler in 1886. The importance of the metal has increased very much since World War II because of its use as a semiconductor in diodes and transistors.

All commercial scale germanium is now produced as a by-product of base metal processing. Although the United States Bureau of Mines is conducting a program for the recovery …

Refrigeration Heat Transfer Characteristics Of An Artificially Cooled Trout Pond, Richard G. Murray

Masters Theses

"In many locations natural summer lake and pond temperatures are too great for the practical production of trout for fishing purposes.

The purpose of this thesis is to investigate the refrigeration capacity required to maintain a pond of water at a temperature that provides a healthful environment for trout.

The over-all refrigeration load for this application was sub-divided into four categories; conduction, convection, evaporation and radiation. Each type was solved by analytical means using suitable boundary conditions and simplifications. It was necessary to determine one boundary condition for the conduction heat transfer by an empirical method.

The results of this …

Study Of The Copper-Uranium Deposits At Vilcabamba, Department Of Cuzco, Peru, Oscar Aguilar

Masters Theses

"Uranium has been known in the Vilcabamba district of Cuzco, Peru since 1954. Copper ores of high silver content were worked by the Spaniards during the seventeenth and the early eighteenth centuries, At the beginning of the twentieth century these ores were worked intermittently; during the last fifty years no mining operation has been going on.

The oldest rocks in the thesis area consist of Ordovician phyllites. The presence of Devonian in the area is questionable, but has been recognized 5 km. away from the thesis area. A conglomerate of limited lateral extent of Mississippian age overlies the Devonian (?) …

A Study Of A Second-Order Predictive Control System, Tarkeshwar Singh

Masters Theses

"The purpose of this thesis is the study of a predictive control system by simulating it on an analog computer. Logic criteria for step reference inputs are derived by the phase- plane technique, and tie corresponding logic network designed to bring the error and error rate of the controlled system toward zero in the least possible time.

The responses of the predictive control system for step, ramp, sinusoidal and exponential reference inputs are investigated with primary emphasis placed on the rise time and overshoot for several values of step inputs of the reference.

Finally, recommendations are made for further investigations …

A Study Of The Behavior Of Zirconium In Aqueous Solutions And The Separation Of Radioactive Zirconium By Electrodialysis, Charles William Brauer Jr.

Masters Theses

"Nuclear reactor installations designed for power production must of necessity operate at higher energy levels than their experimental precursors. As these facilities increase in number, better solutions must be found for both technical and economic problems.

The disposal of waste materials is of primary importance and will require greater effort if satisfactory disposal methods are to keep pace with the increase of waste materials, produced by the increasing number of new nuclear facilities. The radioactive materials present in this waste material may constitute a valuable by-product from these operations if suitable and economic recovery procedures are developed. If the development …

An Evaluation Of State Mineral Taxation In Missouri, Jerry Wayne Huffman

Masters Theses

"A study was made to evaluate the present taxes levied on the mineral industry in the State of Missouri. The corporate income tax, corporate franchise tax, and general property taxes were examined, in addition to the mine inspection fees and methods of local assessment of mineral properties.

It is suggested that the State of Missouri revise the method of application of the general property tax to mineral properties. Utilization of the principle of taxation of future profits and employment of qualified appraisers would provide a more equitable application of the general property tax.

It is recommended that the present mine …

Investigation And Development Of Ground Water Of Chalone Creek, (Pinnacles National Monument, California), Donald Lee Brown

Masters Theses

"The Pinnacles National Monument is located in San Benito and Monterey Counties about 130 highway miles south of San Francisco, California. Because of unusual patterns in volcanic rocks, the Monument was set aside as a recreation area on January 16, 1908, by President Theodore Roosevelt. It encompasses an area of approximately 12,818 acres.

Water quality and supply problems were experienced at the Monument in the few years prior to 1961. In 1961, a collection trench system was installed to alleviate the water supply condition. A horizontal trench system, 215 feet long and four feet below the dry season water table, …

The Dielectric Strength Of Some Anti-Corrosive Paints, George Albert Chappell Iii

Masters Theses

"Corrosion has been one of the costly problems to industry because each year losses due to corrosion are in excess of six billion dollars. Corrosion is caused by the tendency of all metals to become oxidized and return to their natural state. Oxidation may be suppressed by restraining the flow of electrons from the system, thereby inhibiting corrosion.

One effective means to prevent rusting is by applying a barrier of paint between the system and the corrosive atmosphere. Not all paints, however, are equally effective as corrosion inhibitors. At present, the only effective means of determining the corrosion resistant ability …

Velocity Distribution Induced By Free Jet Impact On A Stilling Basin, Sedat Özkol

Masters Theses

"At present, the use of the free jet impacting on a stilling basin as an energy dissipator is not very common, as there is very little information available concerning this particular field. However, if conditions are favorable, this type of energy dissipator will be quite economical to construct.

In this paper it was found that the hydraulic behavior of the free jet impacting on a stilling basin can be determined to a degree which may be considered accurate for practical purposes. It was also shown that given the free jet velocity, the magnitudes of the velocities at the critical points …

Transpiration Cooling Of A Porous Plate, Stephan A. Sayegh

Masters Theses

"Transpiration cooling has long been known as an effective way of removing heat from porous materials. This thesis is a new approach to one of the problems of transpiration cooling in the steady state.

The specific problem considered here is that of a uniform porous plate through which a liquid is forced. This liquid vaporizes at a short distance from the surface through which it is forced and leaves the porous plate at the other surface which is exposed to hot gases. It also protects the hot surface by forming an insulating layer between that surface and the hot gases. …

Analysis Of Flat Plates By Reaction Distribution Method, David D. W. Yang

Masters Theses

"This study was made to analyze rectangular flat plates by the method of Reaction Distribution and to compare results obtained by this method with that of other methods. The basic approach is to divide the plate into an equivalent grid system and introduce temporary supports at the intersecting joints. The results from this study shows that the Reaction Distribution method is useful in a qualitative analysis of the behavior in a plate but is less satisfactory in obtaining reliable quantitative results"--Abstract, page 2.

A Study Of The Permeability And Separation Of Carbon Dioxide And Hydrogen By Gaseous Diffusion Employing Barriers Of Polystyrene, Carl J. Wallace

Masters Theses

"The purpose of this investigation was to study the permeability and separation of carbon dioxide and hydrogen by gaseous diffusion employing barriers of polystyrene. The offset of temperature and barrier thickness on the permeability and separation of carbon dioxide and hydrogen wore Investigated for barriers of one, three, and five-mil thicknesses and for temperatures of 26, 35, 45, and 50 degrees centigrade.

With an increase in barrier thickness of one to five- mils, the permeability of carbon dioxide decreased to one-fourth of its value at the one-mil thickness. The hydrogen permeability decreased to approximately two- thirds of its value at …

A Study Of Composite Beams Made To Find An Approximate Relationship Between The Top And Bottom Flange Steel Ratio, Murli U. Hasrajani

Masters Theses

"At present in building construction the use of the composite beams is not very common. The use of the concrete beams is seen in almost all construction. By using composite beams in building construction more durability and savings in cost could be achieved. This paper shows an approximate design procedure which could be followed without running a number of trials with different sections to arrive at the required one. The ratio of top flange steel to the bottom flange steel can be determined if one knows the loads, span and the depth of the beam required"--Abstract, page i.

A Study Of Placer Tin Materials From Southern Thailand, Somkiat Ganthavee

Masters Theses

"This thesis deals with a series of investigations of placer tin samples from a Chinteik's Tin-dredge, Gnaw District, Ranong Province, and the Tin-Pet mine, Phang-gna Province, in southern Thailand.

A brief summary of the geography and geology of Thailand as a whole has been given as a general introduction to the source of the materials studied in this thesis.

The results of sieve analyses have shown that the sluice boxes do not effectively concentrate the cassiterite grain below 0.147 mm. from the rough concentrate treated in the tin-dressing shed.

It has been found that roundness and shape determinations of quartz …

Transpiration Cooling Of A Heat Generating Porous Plate, M. K. A. Hameed

Masters Theses

"This investigation is a continuation of a thesis by T. S. Purewal. Several of the simplifying assumptions made by the above author are either ignored or the justifiability of such assumptions is probed into in order to obtain a more rigorous solution. Effects of the assorted grain size, non-Newtonian cooling, direction of coolant flow, thickness of the porous heat generating plate, specific heat of the coolant, and compressibility of the coolant are investigated in this thesis. Variation of maximum temperature of both coolant and the solid material for different types of heat source distribution are also studied.

As the grain …

A Study Of Segregation In Cast Aluminum-Uranium Alloys, B. L. Bramfitt

Masters Theses

"This investigation involves a photomicrographic study of the segregation resulting from the eutectic solidification characteristics of aluminum-uranium alloys, ranging from 5 to 30 weight percent uranium. The segregation can occur in either of two manners; the first, due to the gravitational forces acting upon the growing particles which nucleate in the melt and the second, due to the mode and rate of heat transfer through the material. It was found that segregation occurred only as the result of the latter factor due to the small volume of the ingot and the rapid rate of heat transfer. The segregation was measured …

K₂O/Na₂O Content As A Possible Index To The Chronological Sequence Of Some Precambrian Igneous Rocks Of Missouri, Erwin Joseph Mantei

Masters Theses

"Flame photometric analyses for K₂O and Na₂O were run on 31 samples of the Precambrian igneous rocks of Missouri. Samples were collected from the field, physically prepared and dissolved by a standard method and a modified standard method of rapid silicate analyses. The K₂O, Na₂O values obtained are averages between two methods of analyses. The modified method reduces by 80% the time required to chemically digest a rock sample. The results for both methods are not significantly different. Curtin and Company Advanced Flame Photometer was used.

Results have been plotted on graphs and a chronological sequence for the named Precambrian …

Dipole Approximation Of The Solution For An Electrode Configuration In Two-Layer Resistivity Problem, Siew Hung Chan

Masters Theses

"An electrode configuration which consists of a pair of current electrodes, spaced at a unit apart, being kept at a great distance r from a pair of potential electrodes also spaced at a unit apart, has been investigated. Two theoretical apparent resistivity formulae were derived by applying Kelvin's theory of images to the problem of two-layer case. One formula is obtained by the exact method of solution, the other being obtained by considering the pair of current electrodes as a single dipole. Results of numerical calculations show that the greater the spacing r in comparison to the spacing a, …

Shear Stress Distribution In Haunched Beam Models, Manyu K. Mehta

Masters Theses

"The purpose of this thesis has been to give the distribution of shear stress inside a haunch. A haunch is generally provided to relieve high stress concentrations at the face of the column. However the nature of shear stress distribution inside the haunch is not known.

This stress distribution was determined from a photo- elastic study on a CR-39 model. It is noted that the haunch reduces the stress concentration at the face of the column but at the same time somewhere near the point where the haunch meets the beam there is a high stress concentration.

Shear stress changes …

Stylolites And Sedimentary Structures In The Cave-In-Rock Fluorspar District, Southern Illinois, Won Choon Park

Masters Theses

"This thesis deals with stylolites, slump structures, sulfides in the oolitic limestone, and geometry of the bedded fluorite deposits in the Cave-In-Rock fluorspar district, southern Illinois. Stratigraphic zones studied were: 1) the upper part of the lower Fredonia limestone member, 2) the upper part of the upper Fredonia limestone member,,and 3) the upper part of the Renault formation.

Geometry of the ore rocks and related structures was investigated. Most of the ore is layered and constitutes part of the sedimentary strata.

Slump structures were observed and studied in detail. Most of the slump structures show evidence which indicates a sedimentary …

Buttressing Effect In 3, 3' -Disubstituted-2, 2' -Three-Carbon-Atom Bridged Biphenyls, Yunn Hui Chiang

Masters Theses

Introduction

The configuration of biphenyl has been the subject of much investigation and many recent reviews (1, 5, 6, 7, 8, 17, 21, 22). Of particular interest has been the configuration of 2,2' -bridged biphenyl derivatives. The preparation of an optically active 2,2' -three-carbon-atom-bridged biphenyl having an ultraviolet absorption maximum at 250 mμ, has been recently described (14). Although the compound was easily racemized, this property requires that a non-planar configuration be assigned to this biphenyl (I). Furthermore, this ultraviolet spectra indicates that inter-ring conjugation must exist in the non-planar configuration.

Introducing Aquatic Ecology To Ninth Graders, Inez P. Sutton

Masters Theses

Chapter I

Introduction

In discussing the basis for teaching high school biology, Van Deventer¹ states, "...the present typical course in high school biology serves adequately neither the terminal student nor the college entrance student." He holds that today's courses present watered-down versions of college courses to the student before the intelligence of the student has matured enough to grasp such subject matter. As a result there is very little carry-over value from such courses, and the students may even develop a dislike for biology. This study constitutes an effort to understand these problems and to devise ways of solving …