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Examination Of The Underlying Trends In Village And Rural Recreation With Application In The Three Oaks School District, Alfred Pfliger

Masters Theses

No abstract provided.

Wetting Properties Of Enamel Glasses And Relation To Adherence, Chandrakant Chhotalal Shah

Masters Theses

"Various investigators have tried to find the cause of adherence of enamel glasses to iron metal and they have put forward different theories to explain this phenomena of adherence. In spite of much work done on adherence, no theory has generally been accepted to explain the function of adhering oxides like cobalt, nickel or manganese, etc., in sheet iron ground coats. In this investigation it was thought to find out whether adherence promoting oxides have any effect on the wetting abilities of enamel glasses at elevated temperatures or not, and further, whether this different wettability caused by the different adherence …

A Preliminary Investigation Of The Titanium-Copper Equilibrium System, August Robert Savu

Masters Theses

"The element titanium has a high degree of chemical activity at room temperature when in a finely divided condition. In the massive state this activity is only exhibited at high temperatures. The powdered metal is highly pyrophoric. Titanium forms quite stable sulphides and carbides, although these are subject to oxidation at high temperatures. It also form nitrides. Titanium being a transitional element forms hydrides with hydrogen which are stable at ordinary temperatures, but which dissociate at red heat liberating the hydrogen and leaving the metallic titanium in a very active state. Alloys are formed with such metals as aluminum, manganese, …

Evaluation Of Quenching Media Using The End-Quench Hardenability Test, Subodh C. Das Gupta

Masters Theses

"The purpose of the thesis was to evaluate the quenching speed of different quenching media by studying their behaviour in relation to hardenabilities of steels, using the standard A.S.T.M. End-quench Test. At the outset an understanding of the term "Hardenability", so extensively used in industrial heat-treatment, is necessary, The property of a steel, of hardening on quenching to various depths beneath the surface is referred to as the 'Hardenability". It may simply be called the "susceptibility to hardening". Hardenability should be distinguished from the "Hardening capacity", which represents the magnitude of the hardness achieved. The chief factors which affect the …

Effect Of Titanium Dioxide As A Mineralizer In Silica Brick, Henry Clay Brassfield

Masters Theses

"The magnitude of the thermal expansion of silica brick and its inability to withstand rapid temperature changes gives rise to problems of considerable importance in the manufacture of silica brick. In firing the silica brick, mineralogical changes occur in the quartzite from which the brick is made, in which minerals of lower specific gravity are formed. This results in a permanent expansion of the brick. These mineralogical changes have been thoroughly studied and considerable information is known on the different forms of silica produced at the higher temperatures. If the conditions of firing are such that these changes have progressed …

Torque Characteristics Of High Speed Steel Twist Drills, Tien Chi Lee

Masters Theses

"The drill is the most efficient tool used by machinists, for in no other tool is the cutting surface as large in proportion to the cross sectional area of the body or part that is its real support. Drills have shared evolutionary developments from carbon steels to high speed steels and from flat to twist drills. Many investigations have been made on the twist drills, but due to the majority of their work being based on the size of drills from 1/2 to 1-1/2 inches or larger, there is a dearth of published data on the general problem of drills …

Design And Construction Of An Electronic Gain-Phase Meter, Gabriel G. Skitek

Masters Theses

"There are many communication and electronic circuits, such as filters, phase-shifting networks, matching networks, voltage amplifiers with and without feedback, whose proper usage with associated equipment depends upon the knowledge of the variation with frequency of the voltage ratio and phase angle between the output and input sinusoidal voltages or currents...It is the purpose of this thesis to design and build an electronic instrument that will measure the voltage gain and phase angle between two sinusoidal voltages or current of communication circuits, in such a manner as to aid the student in visualizing how these quantities vary with frequency, and …

Analysis Of Cascade Of Four-Terminal Networks, Ernest Randolph Roehl

Masters Theses

"The object of this thesis is to find analytic expressions for the voltage and current variations along a structure composed of a cascade of identical dissymmetrical four-terminal networks driven harmonically at the sending end and working into an impedance at the receiving end and an impedance that can be placed at any of the junctions along the cascade. The method of analysis that is applied is analogous to that used in solving the long-line problem. A transmission system usually consists of the line or cable itself plus numerous other links whose purpose it is to correct defects in the line …

Further Studies - Heat Transfer Coefficients For Liquids In Forced Convection Normal To Banks Of Staggered Tubes, Terrell C. Claunch

Masters Theses

"The problem for these experiments may be divided into two sections. The first section of the problem consists of setting up procedure for duplicating data. The second section is that of studying and explaining characteristics of the resulting curves. Correlation of the data obtained will be necessary in order to obtain the curves. In order that the first section of the problem could be solved it was necessary to establish a standard of cleanliness for the apparatus used. Establishment of procedures for the operations and cleaning of the apparatus was necessary. Before Kenneth E. Rudert began his design and construction …

Effect Of Transition Elements On The Transmittance Of B₂O₃ Glasses, Chandubhai Gordhanbhai Amin

Masters Theses

"For many years, boric oxide has been used extensively as a minor constituents in silicate glasses, because of its beneficial influence on their physical properties as well as on glass melting processes; but when used without silica or in too large proportion, the resulting glasses lack chemical durability...Because of its detrimental effect as a major constituent in silicate glasses or in borate glasses, very little work has been done on borate glasses, especially on colored borate glasses...The purpose of this investigation is to find out the effect of the transition elements on the transmission curves of the colored borate glasses"--Introduction, …

Design Of A Barge-Platform Marine Drilling Rig, Ely Schwartz

Masters Theses

"ln the quest for oil in the Gulf of Mexico, princi­pally off the coasts of Texas and Louisiana, unique types of drilling rigs able to cope with environmental conditions have been developed in the last several years. This development is highly specialized and has led to methods of operation revolutionary to the oil industry and is without precedent….

In designing a drilling platform there are three cardinal aims (1) low cost installation and operation, (2) ease of operation, (3) providing safe working condi­tions.

The initial problem is to extend the shore-based fabrication and reduce the offshore construction, foul weather delays, …

Comparative Study Of The Collecting Property Of Naphthenic Acids With Oleic Acid As Applied To Calcite, Hematite, Barite, And Fluorspar, Siddhi Nath Mukherji

Masters Theses

"The present investigation was undertaken to find out any comparable collecting property of some of the industrial naphthenic acids available in the market with that of commercial grade of oleic acid so that some information may be available in selecting naphthenic acids as flotation collectors. In the flotation industry, usefulness of oleic acid as non-metallic minerals collector is well established. On the other hand, the use of naphthenic acids as flotation collector has been reported only in few cases. Even in those cases, no attempt has been made to correlate their collecting properties with that of their physical and chemical …

The Investigation Of Color Modification As A Result Of Solid Solution, Bobby Lee Mornin

Masters Theses

"To the ceramic industry, color has long been one of its chief problems, not only in reproducing colors in the many complex silicate structures but in the development of stains that are stable at high temperatures and that are economically feasible for mass production. At the present time a stable high temperature red or yellow would be very desirable. Solid solution has been employed in ceramics to modify and thereby provide ceramic materials of different physical characteristics. The limited data available with respect to such solid solution serves to indicate that perhaps this state may serve as an important means …

A Study Of The Power Consumption Of Mine Scrapers, Stanley Francis Johnsen

Masters Theses

"Since scrapers were first employed in underground mining work, numerous changes in scraper design have transpired until now there are several common types of scrapers in use in mines over the world. The proved models of scrapers have been developed over a period of more than fifty years. Although specific scrapers have been tested to determine the amount of power consumed, no literature could be found concerning the relative power consumption of the different types of scrapers when operated under identical conditions. Purpose of Problem - The purpose of this study is to determine the relative efficiency of different types …

Interrelationship Of Transverse Anchorage And Adhesive Bond In Welded Wire Reinforcement, Alan Arthur Becker

Masters Theses

"...Welded Wire Reinforcement Fabric has been applied only to certain "light types" of reinforced concrete construction. It has not as yet been applied as main tension reinforcement for most concrete structures, mainly due to the fact that a thorough investigation of the potentialities and possibilities of welded wire fabric has not as yet been conducted. It is expected that the data collected in this investigation coupled with data collected in similar investigations performed at the Missouri School of Mines and Metallurgy will furnish the basis for a structural and economic comparison between welded wire fabric and ordinary reinforcing bars. The …

Aerodynamic Research For An Improved Rotor Control System On Helicopters, Delmar Wallace Breuer

Masters Theses

"Since the author has always been interested in Aeronautical Engineering, and in particular, rotary-winged-aircraft, the problem of research for aerodynamic improvement of rotary-wing control systems was chosen. This problem was suggested by the Army Aircorps Officials of Wright-Patterson Field of Dayton, Ohio as being a valuable and practical problem for the government. It is also valuable and practical for the author since it follows his general course of undergraduate study and since it fits closely into the field for which he is preparing himself...The requirement with which the author is most concerned is the design system for the producing of …

A Graphic Method For Determining Pressure Losses Due To Air Friction In Mine Airways, Robert F. Bruzewski

Masters Theses

"One of the most important factors that influence the selection of a fan or blower for circulating a desired quantity of air through mine workings is the total pressure that is required to overcome the resistance of the airways. Ordinarily, the major portion of this resistance is that caused by friction of the moving air on the surface of the airways. The pressure that is required to overcome this frictional resistance is calculated by means of the friction formula"--Introduction, page 1.

Analytical Investigation Of Thin And Moderately Thick-Walled Tubing Under Peripheral And Biaxial Loading, Frank Joseph Cizek

Masters Theses

"The problem then, resolves itself into a study of the behavior of thin-walled and moderately thick-walled cylinders under the effects of an external fluid pressure acting alone, or the effects of an external fluid pressure acting simultaneously with an axial loading. In this thesis a theoretical or analytical approach will be used. Some application and reference will be made to oil-well casings in particular, but the solutions will not be restricted to oil-well casing alone. it must be recognized that the tubing problem involves the problem of unstability before the proportional limit of the metal is exceeded and a similar …

An Investigation Of The Weavability Of Wire With Observations On The Defects Of Wire And Wire Cloth, Walston Chubb

Masters Theses

"In the course of this year's work under the auspices of the Ludlow-Saylor research fellowship many problems of interest to the wire weaving industry have been investigated. Some of these problems have no academic novelty; others were not completed and have been laid aside for future investigations. The major problem for investigation this year was to discover a method by which the weavability of wire might be evaluated. A second problem for investigation was to discover the causes of some of the defects of wire and wire cloth. In addition to presenting the results of these investigations, this thesis represents …

The Barite Industry In The United States, James Byron Chaney

Masters Theses

"Within the past few years, barite has become one of the most important non-metallic substance mined in the United States, as expressed by the large increase in production since 1943. The purpose of this treatise is to combine in a single volume important information concerning the geographical distribution, geology, mining methods, milling or beneficiation methods, production and utilization of barite in the United States. A large number of references has been used in preparing this treatment. The information has, as far as possible, been brought up-to-date. It is thought by the writer that the paper will present to the reader …

Preparation Of Copper Single Crystals By Means Of Powder Metallurgy Methods, Wei-Kung Chang

Masters Theses

"Since different mechanical properties of metals result from different grain size became known, the metallurgists have been interested in finding out the true nature of the grain boundaries. Consequently, several different theories concerning the mechanism of recrystallization, grain growth, and the structure of metals were advanced and studied. These threw much light on the difference of properties between polycrystalline metals and single crystals of the same metals. The single crystals of metals were studied because they enabled the investigator to determine the important points of metallic behavior. The first work on single crystals was rather obscure and limited to isolated, …

Design Of A Wind Tunnel For The Missouri School Of Mines And Metallurgy, William E. Speece

Masters Theses

"For some time there has been a need for a wind tunnel at the School of Mines for experimental work in the Civil and Mechanical Engineering Departments. With the expanding program and the possibility of establishing an Aeronautical Engineering School here, the need will be even more pronounced. So the problem will be of definite practical value. It was the original idea to design a small tunnel, build the tunnel, and to run a series of smoke tests on various structural models. However, after discussing the possibility of such a problem with school authorities, it was decided that if a …

Water Injection In The Modern Automotive Spark Ignition Engine, Leonard Carl Nelson

Masters Theses

"The injection of water in the spark ignition engine is not new. The effect of humidity in the air on the performance of the spark ignition engine probably initiated the early investigations. The water vapor in the inlet air decreases the speed of the flame front and necessitates spark advance to assure maximum power and maximum efficiency. Water particles in the air evaporate during the compression and combustion of the inducted charge and decrease the tendency of the engine to detonate. These effects are very evident when operating the spark ignition engine in a moist atmosphere. Water is not a …

The Application Of The Relaxation Method To The Solution Of Problems Involving The Flow Of Gases Through Porous Media, Ralph Davis

Masters Theses

"The purpose of this investigation is to determine the feasibility of applying the relaxation method of mathematical analysis to the solution of problems involving the flow of gases through porous media. The relaxation method was first applied to two-dimensional problems by Christopherson and Southwell, who applied it to problems in stress analysis. It was later applied to steady-state heat conduction problems by H. W. Emmons and to steady-state flow of incompressible liquids by A. A. Zwierschowski. The solutions of problems involving the flow of gases through porous media is difficult for all but the simplest boundary conditions, and impractical for …

An Investigation Of The Production Of Multicarbide Of Tungsten And Titanium From Wo₃ - Tih₂ - C Mixtures, Chi-Mei Hsiao

Masters Theses

"The purpose of this research was to investigate the possibility of producing the multicarbides of tungsten and titanium from a tungsten oxide-titanium hydride-carbon mixture. It appears to be worthwhile to carry out the reduction, carburization, and pre-alloying in one process, i.e. reducing tungsten oxide with the dissociated hydrogen from titanium hydride and the added carbon; then carburizing the reduced tungsten metal and dissociated titanium metal; at last, pre-alloying the mixture of TiC and WC. The replacement of titanium hydride with titanium oxide seems to be more direct, simple, and economical process; but the difficulty in the reduction of titanium oxide …

Reduction Of Zinc Sulphide In A Vacuum, Tien-Shih Liu

Masters Theses

"The successful large scale commercial application of high vacuum for high temperature metallurgical operations is a comparatively new development. The use of Pidgeon and the carbothermic processes for the production of magnesium during the war forced a perfection of both equipments and techniques for high vacuum operations. This opens broadly the way for a great expansion of vacuum metallurgy. Vacuum operation is thus no more a laboratory method - it is a kind of industrial practice. Many metallurgical operations, which cannot be carried out by ordinary processes, are made feasible when conducted in a reduced pressure. typical examples are the …

The Application Of The Relaxation Method To The Solution Of Problems Involving The Flow Of Fluids Through Porous Media, Alexander Antoine Zwierzchowski

Masters Theses

"The purpose of this investigation is to determine the feasibility of applying the relaxation method of mathematical analysis to the solution of problems in rheology. The relaxation method was first introduced by R. V. Southwell who applied it to the problem of electrical conductivity. It was later used by M. W. Emmons to solve two-dimensional heat conduction problems. The steady-state flow of fluids through porous media can be difficult or impossible by the usual analytical methods even with rather simple boundary conditions. The relaxation method promises to provide an easier method of solution and to provide a means of solving …

An Investigation Of An Electronic Ignition System For Internal Combustion Engines, Richard David Wheat

Masters Theses

"Many types of electric ignition systems have been developed, used, and discarded in favor of systems less expensive and more adaptable to internal combustion engines, Two types which might be classified as high-tension, jump-spark systems are in common use today. These two systems are (1) Battery-coil ignition used mainly on automobiles, and (2) Magneto-ignition used extensively on aircraft engines. A considerable amount of work has been done to determine the extent to which the character and intensity of the electric spark affect the ignition process. This work has revealed that a certain minimum amount of energy is required from the …

Barium-Tin Alloys, James Richard Whanger

Masters Theses

"The author attempted to produce alloys of barium and tin using metallic barium and barium hydride. Also, an attempt was made to study the phase diagram using thermal analysis and X-ray investigation"--Introduction, page 2

Analysis Of The Transit Traverse Survey Method Of The United States Department Of Interior, Geological Survey, Edward John Kimmick

Masters Theses

"This thesis was undertaken to ascertain the feasibility of incorporating the United States Geological Survey methods of surveying and computing into a course of study in the Civil Engineering curriculum. It has been the author's opinion that a course of study could be tendered, as a definite project, which incorporates fundamental surveying and advanced surveying. The author's planned course of study was a method of third order transit traverse survey streamlining the method used by the United States Geological Survey. The time element and weather were the essential factors in the planning. In the advanced surveying course there are eighteen …