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An Investigation Of The Comparative Effects Of Several Fill Materials On Heat Losses In The Ground From A Radiant Floor Panel, Peter H. Benedict

Mechanical Engineering ETDs

It was the purpose of this investigation to compare the amounts of heat lost into the ground and through the foundation walls of a small test cubicle heated by means of a radiant floor panel when the fill material under the floor slab consisted of either crushed stone, pumice aggregate, or dry-compacted soil.

An Experimental Investigation Of The Te01 Electromagnetic Fields In Ridge Waveguide, George A. Arnot Jr

Electrical and Computer Engineering ETDs

The aim of this thesis is to arrive at the field distribution of the ridge waveguide for the TE₀₁ mode, either mathematically or experimentally, the latter proving to be the case. Under the heading of Theoretical Considerations the difficulties involved in obtaining a mathematical solution to the problem are presented. The experimental results then follow and in the Conclusions a comparison is made of the results obtained by other writers and the author's data.

Frequency Modulated Audio Oscillators, James L. Dossey

Electrical and Computer Engineering ETDs

It was therefore the purpose of this study (1) to evaluate existing sub-channel oscillator circuits seeking first, to improve them; (2) to uncover new ideas, and to incorporate them into a frequency modulated audio oscillator that would satisfactorily fulfill the required specifications; (3) once such a circuit was found, to obtain such refinements as simplicity of alignment, interchangeability of tubes, better frequency stability by utilizing proper mechanical design, and smaller, cheaper parameters without sacrificing performance.

A Sine-Wave Frequency Dividing Circuit, Louis L. Fisher

Electrical and Computer Engineering ETDs

The scope of this thesis was to investigate the stability, dividing range and some of the characteristics of a new type of sine-wave frequency divider.

A Recommended Program Of Related Instruction For Electrical Apprentices, Andrew C. Luff

Masters Theses

Chapter I

Introduction

The Role of Apprenticeship

The institution of apprenticeship has been an important educational process since the beginning of history. Centuries ago trade skills were passed on from father to son, and from master to novice through an association whereby the craftsman taught the novice the skills of his trade. Down through history apprenticeship has flourished either in one form or another, and today it is an important part of the industrial system. Apprenticeship has developed in accord with industrial progress.

In order to avoid confusion, it may be well at the outset to designate the meaning of …

An Evaluation Of Necessary Elements For Desirable Industrial Arts Instruction In The Elementary Schools Of Utah, Lee W. Ralphs

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An essential part of the elementary school curriculum is the creative activity program connected with it. Educators believe that the fullest development of the child can best be attained through a program which provides a series of well selected experiences and activities. At present education considers the whole child--his abilities, needs, and interests--as vital factors in the development of a good curriculum, instead of merely the concrete and formal subject matter. Recently there has been an expressed view, by administrators of elementary school systems and many authorities and industrial arts teachers, that there is a definite need for formulating an …

Magma 1951, Associated Students Of The Montana State School Of Mines.

Magma 1948-1997

No abstract provided.

Cellulose Pellets, John J. O'Neill Jr.

Professional Degree Theses

"This thesis describes the development of a new process for the manufacture of spherical particles of cellulose, regenerated from cellulose zanthate.

An electric equipment manufacturing company advised the author’s company that it had developed a device that required uniform spheres of regenerated cellulose having a diameter of about 75 to 100 mils. This company reported that it had developed a process for the manufacture of the cellulose particles but that the spheres produced by the process were not uniformly spherical. The equipment manufacturer considered that the functioning of the new device could be improved if the cellulose particles could be …

Studies Of Antimony Occurrence With Special Relation To Its Effective Extraction, San Jose Antimony Mines, Wadley, San Luis Potosi, Mexico, J. C. Archibald Jr.

Bachelors Theses and Reports, 1928 - 1970

The mines at San Jose which are within the Wadley unit are the largest antimony mines in Mexico. These mines produce more than half of the antimony produced by the company from its mining operations. Since the time of the author's connection with the company, a number of changes have been made in planning of development work, handling of labor, methods of mine development, cost improvement, and other problems inherent in the successful guidance of an operation.

The Use Of Oil-Base Drilling Fluids, William Wesley Collins

Masters Theses

"Within the past few years the development of oil-base drilling fluids has become one of the more important contributions to drilling and production technology. The use or these new muds has increased as the benefits obtained have become more widely known and appreciated. Major problems in the petroleum industry have been, for many years, the contamination or drilling muds by salt water; control of mud when drilling through anhydrite, gypsum, or salt deposits; control of heaving or swelling shale; and water or mud blocking or the producing horizons. The development or oil-base drilling fluids is a direct contribution or engineers …

Photoelastic Investigation Of Filleted Corners In Square Apertures In Flat Plates Subjected To Tension, Raymond Huston Bever

Masters Theses

"During recent years many advances have been made in solving engineering problems by mathematical means. While this method of solving problems is invaluable to the engineer, there are times when a rigorous mathematical solution cannot be readily obtained, and the engineer must resort to other methods, some of which are approximate.

This paper attempts to show the application of photoelastic investigation to such a problem. The results of this problem are quantitative, but they show without any doubt that this method of investigation has considerably influenced the modern design of machine parts and helped in many cases to improve construction …

A Visual Investigation Of The Appearance Of Turbulence In Annular Spaces., Thomas Anderson Feazel

LSU Historical Dissertations and Theses

No abstract provided.

Recovering Oil From An Unconsolidated Sand By Means Of Combustion, David K. Anderson

Masters Theses

"For many years, there has been talk expressing great concern about the oil reserves in the United States. Every four or five years, articles are published stating that we are running out of oil and our proved reserves, to date, are only adequate, at our present rate of consumption, for about 20 years. While this is true, it does not leave us with the complete picture. The industry in the past 20 years has never had more than a 20 year reserve. It must be said, however, that it is becoming more difficult with each passing year to find oil …

Air Flow Through Cloth Screening, Kurt Rauf Basakinci

Masters Theses

"The object of this investigation is to obtain an expression whereby flow of air through woven cloth can be predicted with a reasonable degree of accuracy, in terms of the pressure drop across the screen, the density, the viscosity of the air flowing; these latter properties being functions of the pressure and temperature of the air.

The development of an expression from which to predict the relationship between the air flow through a screen and the pressure drop across it without resort to experimental procedure seems to the author to be worthwhile undertaking.

The chief aim of this investigation was …

Investigation Of Stress And Crack Distribution In Concrete Slabs Containing Welded Wire Reinforcement, Joseph H. Senne

Masters Theses

"Concrete is daily becoming more important as a structural material. However, without steel reinforcement, concrete would never have attained such wide use since, being weak in tension, it must be combined with some other material to take the tension stresses and prevent the tension cracks in the concrete from opening an appreciable amount.

One type of steel reinforcement used particularly for footings, beams and columns is known as deformed bar. In this case deformations are placed on the bars at the time of rolling. These deformations act as mechanical anchorage in preventing the bar from slipping, thus allowing it to …

The Effect Of Back Pressure Created By A Venturi Tube On Power Output And Efficiency Of An Internal Combustion Engine, James J. Trace

Masters Theses

"The exhaust pressure against which an engine works affects the amount of pumping losses, the volumetric efficiency and the rate of advance of the flame front during the combustion process.

When the back pressure is decreased to the same pressure as the intake pressure, the amount of negative work done during the exhaust-intake process approaches the positive work done during the process. It can be seen from a PV diagram that it is possible to make this negative work less than the positive work and gain work during the process.

Because of the "15 to 30 degrees” of intake valve …

An Investigation Of Ruthenium As A Possible Ceramic Colorant, John Charles Williams

Masters Theses

"Some portion of almost every writing dealing with the historical development of ceramic products is devoted to describing the application of colors as found on even the most ancient specimens known to exist. A vase bearing the name of an Egyptian king living 5000 B. C. was glazed in green and inlaid with purple. There are many such examples of the utilization of color in ceramics which illustrate to a certain extent the aesthetic tastes of the very earliest and primitive civilizations.

In those early times, only a few elements were known and available that could be used for such …

The Effect Of Temper Carbon Nodule Number On The Physical Properties Of A Malleable Iron, William J. Ruprecht

Masters Theses

"It is known that the number of temper carbon nodules per unit volume of malleable iron has an effect on both the rate of anneal and on the resulting physical properties, but neither have been clearly worked out quantitatively. The purpose of this investigation is to ascertain the effect of temper carbon nodule number on certain of the physical properties of a commercial malleable iron.

Quantitative determinations of the effect of temper carbon nodule number would be essential from a theoretical viewpoint in working out the mechanism of graphtization, and would be useful in commercial practice in showing the most …

Well Interference In The South Silica Field, Langdon B. Taylor

Masters Theses

"During World War II the Federal Government restricted oil-field drilling in the United States in order to conserve steel. The wartime regulations required 40-acre spacing in most areas. At the close of the war, the Federal drilling restrictions were lifted, and control of oil-well spacing reverted to the several state regulatory bodies. Each of these state agencies was then confronted with this problem: should 40-acre spacing be continued or should pre-war 10- and 20-acre spacing patterns be re-established?

The regulatory authority in Kansas, the State Corporation Commission, ordered an investigation in January, 1946, for the purpose of developing information upon …

The Relationship Between The Centrifuge Moisture Equivalent And The Vacuum Moisture Equivalent In Soils, Samuel Payton Halcomb

Masters Theses

"Soil is a material that has been formed through the influence of many different natural agencies. The engineer is not so much interested in how the soil was formed, but he does want to know the characteristics of the soil with respect to its use as a structural material. Therefore, the engineer is primarily interested in the physical properties of soils.

Much progress has been made during the past twenty five years in the study of Soil Mechanics, but even today there is a tendency among engineers to think of soil as just a mixture of clay, sand, silt and …

The Reactions Of The Sodium-, Potassium-, And The Lithium Tungsten Bronzes In The Solid State, Keki Khodadad Irani

Masters Theses

"The first part of this dissertation has the intention of determining whether MoO₃ forms solid solutions with Na-W bronze corresponding to the formula NaWO_3(1-x) (MoO₃)_x and whether the so-called “sodium-molybdenum bronze” exists.

The next part is concerned with the solubility of K-W bronze in Li-W bronze at high temperatures, in a vacuum, and the last part or this work has the intention of studying the solubility of K-W bronze in Na-W bronze at different temperatures.

The interest in this work is of a purely scientific nature rather than of academic interest"--Introduction, page 1.

Highway Construction And Maintenance Equipment With Machine And Automotive Repair Shops For The Reconstruction Of The Highways Of The Iv Division, Ankara, Turkey, Steve Theodorides

Masters Theses

"With the rapid advancements being made in travel and communication facilities today, the world is steadily growing smaller and people in the far places of the world are no longer strangers.

There is no doubting the importance of tractors, dozers, scrapers, power shovels, graders, bituminus construction equipment, aggregate handling, etc., in the present-day world, in aiding the progress of civilization and bringing to all people the good things of life.

It must be remembered that money expended for highways is not wasted, and can be classified as an asset.

In substance, this is a general project for the reconstruction and …

Increased Stripper Well Recovery By Means Of High Voltage Electrical Heating, John Curtin Schratwieser

Masters Theses

"The purpose of this work is to investigate the possibility of using high voltage electrical heating to obtain increased stripper well production.

A substantial portion of the oil produced in the United States is obtained from stripper wells. These wells reach their economic limit when they can no longer produce sufficient oil to justify the cost of operation. In the majority of cases, however, there is still a high percentage of oil in the sand. If a production stimulus of sufficient magnitude is introduced into the formation, oil, otherwise nonproducible, may be recovered. It is the writer’s thesis that high …

A Survey Of Single Ended Tuned Grid Tuned Plate Class C Power Amplifiers, Chandrakant D. Gandhi

Masters Theses

"The analysis of tuned grid-tuned plate Class C power amplifiers has been treated by many authors in many ways. The methods differ in accuracy and in time required to obtain the end results. A survey of most important of these methods was taken up by the author of this thesis with an aim towards studying their accuracies, advantages and disadvantages. A general survey of this type of analysis has not been found in the literature. In this survey only the most important phases of the tuned grid-tuned plate single ended Class C power amplifiers are discussed.

This survey has been …

Investigation Of Vacuum Tubes As Four Terminal Networks, Vasil Uzunoglu

Masters Theses

"This thesis was undertaken with the aim of consolidating the most important work that has been done in the field of equivalent vacuum tube circuits which has been found to be highly disassociated.

The author of this thesis feels that this thesis is the most complete consolidation of information on equivalent vacuum tube circuits"--Introduction, page 3.

Investigation Of The Fundamental Properties Of Rubber-Asphalt Mixtures, Yali Cevat Hasan

Masters Theses

"The writer of this thesis believes that the most important thing next to the original construction cost of a road, is the maintenance cost. It is apparent that the maintenance cost for any given road is directly proportional to the percentage of worn out sections in that road. It is believed that climatic conditions are the very first cause of road failures and that traffic on the road often has a secondary degree of importance in the causing of road surface failures….

It is obvious that extreme heat as well as extreme cold will ruin a road. A heavy traffic …

A Study Of Volatility And Desulfurization Of Titanium Disulfide, Sheng-Tai Shih

Masters Theses

"The application of high vacuum for the promotion of metallurgical reactions is a comparatively new development. During the war the need for high vacuum in producing magnesium by the Pidgeon Process and in certain phases of uranium purification led to the perfection of both equipment and technique for high vacuum operations. These developments helped open the way for the entirely new field of vacuum metallurgy.

The reduction of metal oxides in vacuum has been studied by Dr. Kroll and Dr. Schlechten. They have been able to reduce many metals from their oxides under reduced pressures using carbon as a reducing …

An Economy Study Of Vierendeel Trusses, Donald Lee Dean

Masters Theses

"Since the introduction of the pin connected steel truss in the United States in 1847 as a truss that could be actually designed, there has been very few basic changes in the truss as a structure. True, web members have been sloped or braced in many different ways to best adapt the truss for the structural materials being used, and over the protests of many , pin connections have almost wholly given way to riveted or arc welded connections, however, the basic idea of using all members as two force members has prevailed. Concern over the existence of bending stresses …

The Depression Of Quartz In Sulphide Flotation, William Mcminn Billinghurst

Masters Theses

"The flotation of sulphide minerals from siliceous and calcareous gangue minerals always gives a concentrate that is contaminated to a greater or lesser degree with the gangue minerals, even though the collectors used do not show any appreciable collecting properties for the gangue minerals when they are treated alone. In an effort to reduce the amount of undesirable gangue mineral floated with the concentrate it is the practice to add arbitrary amounts of various reagents such as quebracho, alkali hydroxides, carbonates, silicates, sulphides, phosphates, fluorides, and sulphuric acid which have been found to be advantageous. The mechanism of depression is …

A Study Of Some Raw Materials For The Manufacture Of Silica Brick, Charles E. Shulze

Masters Theses

"The ability of silica to carry a load to within a few degrees of its melting point and its tolerance for comparatively high concentrations of iron oxide and lime, have enabled it to maintain its position as the number one steelplant refractory. It is estimated that at least half of the volume of refractories used in the steel plant are silica bricks. Consequently the manufacture of silica refractories forms an industry of considerable importance.

Raw materials suitable for the manufacture of silica brick are widely distributed, but only a small number of deposits are used commercially for one reason or …