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Articles 18301 - 18330 of 18625
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Efficiency Studies Of The Effect Of Moisture On The Power Consumption Of Mine Scrapers, Georges J. Vigier
Efficiency Studies Of The Effect Of Moisture On The Power Consumption Of Mine Scrapers, Georges J. Vigier
Masters Theses
"Many years of practice have resulted in the standardization of several types of scrapers which are now commonly manufactured for use in mining. Although experience has brought out much information on scraping operations, no systematic studies of the efficiency of mine scrapers have been carried out before the experimental works done in the last few years at Missouri School of Mines and Metallurgy. "Purpose of Problem": The purpose of this present study is to consider the effect which moisture in the muck has on the efficiency as regards power consumption and amount of material scraped, of different types of mine …
The Theory Of The Specific Heat Of A Body Centered Cubic Lattice, Curtis Cleveland Webster
The Theory Of The Specific Heat Of A Body Centered Cubic Lattice, Curtis Cleveland Webster
Masters Theses
"In normal crystalline solids the atoms are at rest in their lattice points at absolute zero of temperature. Increasing the temperature of the crystal increases the motion of the atoms about their lattice points. Approximately, each atom or ion may be treated as a harmonic oscillator. then from the equations of motion of the atoms, by the Born-von Karman theory of specific heats, the normal modes of vibration of the lattice can be expressed as the roots of a secular determinant. Application of this theory to determine the thermodynamic properties of crystals has resulted either in solutions that are inaccurate …
Calculations Of Maximum Sag Of A Transmission Line With An Ice Load On One Span, Rodney A. Schaefer
Calculations Of Maximum Sag Of A Transmission Line With An Ice Load On One Span, Rodney A. Schaefer
Masters Theses
"An important problem concerning electric power lines is the calculation of the maximum sag occurring when there is an ice load on only one span. The object of this thesis is to determine a practical method for calculating the maximum sag of a transmission line, suspended on suspension insulators, with the aforementioned loading conditions. This paper is limited to the case where the supports of the transmission line are at equal elevations and all span lengths are equal"--Introduction, page 1.
Economical Span Length Ratios For Three-Span Continuous Girder Bridges, Donald Hindrik Timmer
Economical Span Length Ratios For Three-Span Continuous Girder Bridges, Donald Hindrik Timmer
Masters Theses
"The three-span continuous bridge is one of the most popular bridges used by highway departments at the present time. The low first cost and overall economy combined with the pleasing appearance of this type of bridge as compared to simple span structures has led most highway departments to use continuous spans whenever conditions permit. The design of three-span continuous bridges, as well as the design of any of the other bridge types, is usually carried out as an analysis rather than a design. In the case of the three-span continuous girder, with rolled steel beams, an initial assumption as to …
A Study Of Mine Scraper Efficiency On Materials Of Different Specific Gravities, Kermit Guy Rowley
A Study Of Mine Scraper Efficiency On Materials Of Different Specific Gravities, Kermit Guy Rowley
Masters Theses
"The purpose of this study is to determine the effect that the specific gravity of the material scraped has on the power consumption and the efficiency of the common types of mine scrapers. As scraper weight, rope speed, and moisture content of the muck are important factors affecting the power consumption and efficiency, these variables are the ones considered for each type scraper. Two materials of different specific gravities are used in the study with an equal number of tests run on each material"--Introduction, Purpose of Problem, page 2.
The Theory Of The Specific Heat Of A Face-Centered Cubic Lattice, Charles Robert Bonnell
The Theory Of The Specific Heat Of A Face-Centered Cubic Lattice, Charles Robert Bonnell
Masters Theses
"It is generally accepted that a normal crystalline solid can be pictured at absolute zero as an assembly of atoms at rest arranged at periodic lattice points. Since at higher temperatures each molecule becomes a harmonic oscillator about its lattice point, it is necessary to know the distribution of normal modes of vibration in order to calculate the thermodynamic properties of the lattice...Many approaches have been made to get a simple solution of the problem, but either accuracy is sacrificed for simplicity, or the solutions demand a very considerable amount of labor. The classical theories failed to explain the change …
A Study Of The Efficiency Of Split-Second Delay Electric Blasting Caps In Underground Limestone Mining, John B. H. Fitzwilliam
A Study Of The Efficiency Of Split-Second Delay Electric Blasting Caps In Underground Limestone Mining, John B. H. Fitzwilliam
Masters Theses
"The introduction of electric blasting caps have delay intervals of the order of one-half to one second proved of advantage in many aspects of underground mining, particularly development work. Their use spread, until they now supersede fuse-and-cap firing wherever possible. Split-second delay electric blasting caps are a comparatively recent development from conventional delay caps. They have been found of practicable use in quarrying operations, and have been applied in many phases of underground mining. While evidence, to show that short-delay firing in quarrying is more efficient than instantaneous firing, is becoming increasingly conclusive, it remains to be proved that split-second …
The Study Of Effect Of Definite Grain Sized Sand On The Shearing Strength Of Clays, Faruk Omer Akkoseoglu
The Study Of Effect Of Definite Grain Sized Sand On The Shearing Strength Of Clays, Faruk Omer Akkoseoglu
Masters Theses
"Slopes of all kinds, including mountains, hills, sea coast bluffs, river banks, and man made cuts and fills, stay in place only because of the shearing strength possessed by the soil or rock of which they are composed. The resistance of soils to shearing strength is probably the most important of all the soil properties to foundation engineers. Most of the serious structural failures which are due to unexpected soil behaviour are caused by deficiency in the shearing strength of the soil. Water, on the other hand, possesses no static strength in shear, therefore bodies of water have no surface …
The Determination Of The Solubility Of Hafnium Oxide In Aqueous Solution By The Radioactive Tracer Technique, Hampden O. Banks
The Determination Of The Solubility Of Hafnium Oxide In Aqueous Solution By The Radioactive Tracer Technique, Hampden O. Banks
Masters Theses
"To date, there is no information in the open literature concerning the solubility of hafnium oxide in water other than the fact that it is very insoluble. This lack of experimental information is due, partly, to the fact that hafnium is a relatively new addition to the list of known elements"--Introduction, page 1.
Hydraulic Scale For Measurement Of Dynamometer And Other Forces, John Richard Barton
Hydraulic Scale For Measurement Of Dynamometer And Other Forces, John Richard Barton
Masters Theses
"The object of this investigation is to design, build, test, and develop, a hydraulic type scale primarily to be used for measuring dynamometer forces. The scale however is not limited to use on dynamometers, but may be used for other types of force measurements such as the continuous weighing of material on a conveyor belt in conjunction with a recording pressure gage. The scale has numerous applications in determining forces where conventional scales are now used. This particular subject was chosen because of the need for a convenient, inexpensive, and accurate scale for use in measuring the force exerted by …
The Nature Of Molecular Films Of Oleic Acid On Quartz, Kenneth Lee Keating
The Nature Of Molecular Films Of Oleic Acid On Quartz, Kenneth Lee Keating
Masters Theses
"The purpose of this research was to show the nature of oleic acid on quartz mineral by transferring calcium oleate films, known to be monomolecular and of a definite orientation, to the surface of a piece of quartz, and measuring the resulting coated mineral by contact angle technique"--Introduction, page 1.
Intermolecular Potential Functions For Liquid Argon And Liquid Mercury, Richard H. Kerr
Intermolecular Potential Functions For Liquid Argon And Liquid Mercury, Richard H. Kerr
Masters Theses
"The purpose of this research is to obtain such intermolecular potential functions for liquid argon and liquid mercury by use of the experimental radial density functions available for these two liquids over a wide range of temperatures. We shall introduce the notion of a correlation between the motions of atoms in neighboring cells in a cell theory of liquid structure, and derive a theoretical radial density function involving the intermolecular potential function for a pair of atoms in the liquid. This radial density function, or as it is frequently termed, the atomic distribution function, applied to the experimental data should …
Ammonium And Alkylammonium Salts Of Carboxylic Acids As Characterizing Derivatives, Hal Gilbert Lankford
Ammonium And Alkylammonium Salts Of Carboxylic Acids As Characterizing Derivatives, Hal Gilbert Lankford
Masters Theses
"One of the methods widely used to establish the identity and purity of an organic compound is to prepare various derivatives, the properties of which have been reported in the literature. The object of this investigation was to prepare ammonium and alkylammonium salts of carboxylic acid and determine their utility as characterization derivatives. Should these salts meet the requirements of a satisfactory derivative, they would be particularly valuable from a standpoint time, since they are generally very quickly formed"--Introduction, page 1.
A Comparative Study Of Some Rock Drill Bits, Charles Roger Knopp
A Comparative Study Of Some Rock Drill Bits, Charles Roger Knopp
Masters Theses
"The detachable single-use rick-drill bit has attracted considerable attention in the mining industry of the United States during the past few years. While this type of bit has been used for some time in other countries, it has been only recently that these bits have been manufactured in the United States. It was decided to test this type of bit and make a comparative study of a single-use bit and a widely used detachable rock-drill bit"--Introduction, page 1.
Effects Of Sand Admixtures On The Physical Properties Of Soils, Necati Kanatsiz
Effects Of Sand Admixtures On The Physical Properties Of Soils, Necati Kanatsiz
Masters Theses
"The purpose of this study is to determine the effects of sand admixtures on the physical properties of soils. Soil may be defined as a heterogenous [sic] collection of rock and mineral fragments whose decomposition and disintegration have been brought about by the action of physical, chemical, and biological forces, working singly or in combination...In the conviction that the study of soils, with respect to highway engineering, is becoming more and more important this study was undertaken in order to learn whether the addition of sand would lead to desirable results, and if not, at least secure some further addition …
The Theory Of Limit Design As Applied To Column Analysis, John Francis Mccarthy
The Theory Of Limit Design As Applied To Column Analysis, John Francis Mccarthy
Masters Theses
"In any discussion of compression members of a structure, account has to be taken primarily of the relative "slenderness" or bending weakness of the member. If the member be so short that axial loading causes very slight deflection at any point throughout the member, it is usually designated a simple compression member and no account is taken of the additional stresses due to the deflection. When, however, the ratio of the length to the least radius of gyration of the member becomes so large that bending stresses cannot be ignored, the member is usually called a column and its consequent …
Periodic Heat Flow In A Semi-Infinite Solid, Warren George Heidbrier
Periodic Heat Flow In A Semi-Infinite Solid, Warren George Heidbrier
Masters Theses
"The object of this investigation is to determine by analytical means the temperature within a homogeneous semi-infinite solid, as a function of time, while the solid is receiving heat periodically by radiation on its one flat surface. Periodic heat flow means that heat flow is a continuous function of time and repeats itself at regular intervals. A semi-infinite solid has only one bounding plane and extends to infinity in all other directions...Much of this work deals with the soil temperatures of the earth both at the surface and at various depths. The surface of the earth is subjected to daily …
A Study Of Cast Eutectic Structures By Means Of Optical And X-Ray Microscopy, John Stanton Winston
A Study Of Cast Eutectic Structures By Means Of Optical And X-Ray Microscopy, John Stanton Winston
Masters Theses
"The present research is the result of interest in two rather broad, and at first thought, seemingly entirely separate topics: the structure of eutectics and x-ray microscopy. D. Hanson in 1923 in his correspondence with Albert M. Portevin in regard to his article on the structure of eutectics states, "A point that always stuck him (D. Hanson) in examining eutectics was that one of the constituents always formed a continuous phase round the other one. The orientation of one constituent was either constant or varied in a uniform manner. What, however, was the condition of the 'enveloped' constituent, which formed …
Velocity Studies In A Vertical Pipe Flowing Full, Robert Franklin Tindall
Velocity Studies In A Vertical Pipe Flowing Full, Robert Franklin Tindall
Masters Theses
"The purpose of this investigation is to install a hard drawn copper pipe approximately 1/2 inch in diameter, and approximately 35 feet long in a vertical position. The copper pipe is to have pressure takeoff points at various distances along the length of the pipe. The purpose of these takeoffs is to measure the pressure of the water at the point of takeoff in the pipe. The water is to be forced into the pipe, assisted by gravity, thereby causing a pressure of some measurable quanity [sic] greater than absolute zero pressure. The discharge was to be by volumetric measurement, …
An Experimental Study Of Crystallization In Opal Glass, William C. Rous
An Experimental Study Of Crystallization In Opal Glass, William C. Rous
Masters Theses
"Opal glasses are well known from use in such forms as ointment jars, lighting globes, wall panelling [sic], and decorative effects in glass vases. Cryolite, fluorspar, and sodium fluosilicate are used in varying proportions in most glasses of this type. Since little is known of the mechanism of crystallization in opal glass, there is a definite need of gathering further information on this subject. This information is of particular interest to the manufacturers whose products consist of this type of glass. Further information would aid in control of the characteristics desired and perhaps would allow a more economical control"--Introduction, page …
Design And Test Of An Apparatus For Rate Measurements Of Rapid Gas Reactions, Erich Rolaff
Design And Test Of An Apparatus For Rate Measurements Of Rapid Gas Reactions, Erich Rolaff
Masters Theses
"The present study on rapid gas reactions was initiated with two main goals in view. The first objective was the development of equipment and methods for the treatment of problems arising in extremely rapid gas phase reactions. In recent years, with the advent of large scale applications of gas turbines and rocket motors, the process of high speed gas reactions, especially those of combustion and oxidation have become of increasing importance...The second main goal of the work was to apply the methods and equipment developed to the investigation of chemical systems of interest"--Introduction, page 1-2.
Effect Of Removed Web-Section On Critical Load For I-Beam Columns, Henri Simon Rigo
Effect Of Removed Web-Section On Critical Load For I-Beam Columns, Henri Simon Rigo
Masters Theses
"This investigation deals with a series of column tests of aluminum I-sections which have a perforated web. Specifically, the tests show that the weight is decreased without decrease in strength. Several basic assumptions are made in the design of a column. The physical action of a column is idealized in the derivation of formulae which will predict within reasonable limits the load which the member will sustain. In a given installation of non-homogeneity of material, kinks, uneven bearing, lack of symmetry due to riveting or welding, stress concentration and many other disturbing factors not in agreement with these assumptions may …
The Temperature Within A Homogeneous Plate Of Finite Thickness, Charles R. Remington
The Temperature Within A Homogeneous Plate Of Finite Thickness, Charles R. Remington
Masters Theses
"The object of this thesis is to determine by an analytical method the temperature within a homogeneous plate of finite thickness subjected to a constant temperature on one side and a periodic fluctuating temperature, expressible in a Fourier series, on the opposite side. This problem in periodic temperature changes has not, to the author's knowledge, been solved previously. The flow of heat in the problem is considered in only one direction, the x-direction. Flow in the other two directions is considered negligible, or zero. Periodic temperature changes in the earth are of importance. The temperature changes have been used by …
The Application Of The Relaxation Method To The Solution Of Steady-State Heat Transfer Through A Concentric Square Insulator, William Edward Simpkin
The Application Of The Relaxation Method To The Solution Of Steady-State Heat Transfer Through A Concentric Square Insulator, William Edward Simpkin
Masters Theses
"It is the object of this thesis to express the relationship between the heat transfer through a square insulator of variable inside-outside dimension ratios, in terms of a concentric round insulator of the same inside-outside diameter ration, by means of a continuous curve. Mathematically speaking, this thesis will have a plot of a variable coefficient, cs, to be used...in terms of the ratio of the width of the outside square to the width of the inside square"--Statement of Problem, page 8.
Flood Control With Retarding Basin Type Reservoirs In Meramec Basin, Missouri, Ilhan Kaya Ozbilen
Flood Control With Retarding Basin Type Reservoirs In Meramec Basin, Missouri, Ilhan Kaya Ozbilen
Masters Theses
"When rainfall occurs that provides more runoff than can be carried within the normal channels of existing streams a flood results. The excess water overflows the valley lands, invades developed areas, and causes destruction of property or, in extreme cases, loss of human life...Many structures are built to control water: Waterways of proper depth and width provide arteries of transportation; water controlled and discharged through water-wheels provides power; water may be caught in storage basins and distributed for irrigation or water supply; and water that is an actual or potential source of damage or danger to property or to human …
The Precipitation-Runoff Relationship On The Grand River Basin Of Missouri And Iowa, J. Kent Roberts
The Precipitation-Runoff Relationship On The Grand River Basin Of Missouri And Iowa, J. Kent Roberts
Masters Theses
"In the study of a drainage basin which is to be utilized for water supply or water power, there is frequently a dearth or complete lack of runoff data, though precipitation data are almost always available. The Water Resources Branch of the United States Geological Survey maintains gaging stations on various streams and runoff records from these streams are available from their publications and offices. Many of these runoff records cover a considerable number of years, and are entirely sufficient for use in an analysis of any drainage basin covered by such data. Some of these gaging stations have not …
Effect Of Unionism On Cost Of Coal, Subrahmanya Padmanabhan
Effect Of Unionism On Cost Of Coal, Subrahmanya Padmanabhan
Masters Theses
"Coal is not only the base of our civilization and a key to our continued high standard of living but it is also playing a leading part in the recovery of Europe and other backward nations of the world. Our dependency upon coal as a basic source of energy is growing greater and greater every day. Some day atomic power may be our principal source of energy but the list of technical obstacles that block the way for widespread and commercial use of atomic energy is a long one. Unlike its competitors, such as petroleum and natural gas, the reserves …
A Comprehensive Traffic Survey Of Phelps County, Missouri, Clifford D. Muir
A Comprehensive Traffic Survey Of Phelps County, Missouri, Clifford D. Muir
Masters Theses
"The purpose of this study is two fold. The first of these purposes is to serve as a pattern or guide for any county or township wishing to conduct a comprehensive traffic survey. The second purpose of this study is to provide traffic classification and other data on a typical county system of rural roads. Today, many counties in the United States are faced with the problem of inadequate roads, due to the modernization of the American farm. While they realize this problem exists, may county governments have developed no organized method of studying and determining their needs...When the author …
A Study Of Missouri Flint Clay, Edmond Preston Hyatt
A Study Of Missouri Flint Clay, Edmond Preston Hyatt
Masters Theses
"The problem is one of attempting to explain the peculiar nature of Missouri Flint Clay and to expand the knowledge concerning it. Among the questions for which answers are sought are: What makes Missouri Flint Clay so hard? What happens to Missouri Flint Clay when it is ground? What is the mineralogical constitution of Missouri Flint clay?"--Introduction, The Problem, page 1.
Temperature Fluctuations Within A Solid Of Finite Thickness, William Sanford Hogan
Temperature Fluctuations Within A Solid Of Finite Thickness, William Sanford Hogan
Masters Theses
"The object of this thesis is to determine by analytical methods the temperatures within a homogeneous plate of finite thickness subjected to a constant temperature on one side and a periodically fluctuating temperature on the opposite side. The heat flow in the other two directions is considered negligible in this problem. Periodic changes of temperature are frequent in nature and in engineering. The surface of the earth is heated periodically by the sun in its daily and annual cycle and the periodic temperature changes below the surface and the question to which depth these changes are appreciable were dealt with …