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Articles 121 - 133 of 133
Full-Text Articles in Engineering
A Study Of The Effect Of Jointing On The Blasting Of Granite, Graniteville, Missouri, Avery Ala Drake
A Study Of The Effect Of Jointing On The Blasting Of Granite, Graniteville, Missouri, Avery Ala Drake
Masters Theses
"Purpose of investigation: The purpose of this investigation is to attempt to determine the influence that joints exert upon the blasting of granite and if joints are induced by blasting. The problem grew out of an explosive evaluation project that was conducted by the Mining Department, Missouri School of Mines. In late May 1950, the project was moved into the granite area near Graniteville, Missouri. It became apparent upon study of this area that the jointing would have certain effects upon the results obtained. Dr. J. D. Forrester, Chairman, Department of Mining Engineering, Missouri School of Mines, Rolla, Missouri, suggested …
A Study Of Size Of Diamonds In Diamond Drilling, Robert J. M. Miller
A Study Of Size Of Diamonds In Diamond Drilling, Robert J. M. Miller
Masters Theses
" ''A Study of Size of Diamonds in Diamond Drilling' is the research problem which will be discussed in this treatise.
The author's interest in the effect of size of diamonds was created by Mr. R. D. Longyear of the E. J. Longyear Company of Minneapolis, Minnesota. Mr. Longyear, when asked for suggestions for a research problem concerning diamond drilling suggested, among other things, that there was a need for further work on the factor of size of stones. After extensive reading and reviewing, the author learned that many investigators had recognized changes in results attributable to changes in size …
The Effect Of Impeller Speed And Air-Volume On The Flotation Rate With Respect To Particle Size, William Edward Horst
The Effect Of Impeller Speed And Air-Volume On The Flotation Rate With Respect To Particle Size, William Edward Horst
Masters Theses
"Today the ore being mined is low grade and the mineralization has become very complex. In order to concentrate a complex ore, the requirement of grinding the ore very fine is imposed. The process of flotation was developed to concentrate the finely ground ore particles; however, the finer size fractions of the ore still present a concentrating problem.
The fact has been established that the flotation rate which is the recovery that can be attained during a given time interval varies with particle size. The flotation rate increases with an increase in particle size until the maximum flotation rate is …
Temperature Kinetics Of Nitrogen Dioxide-Ammonia Reactions, George Dillender Jr.
Temperature Kinetics Of Nitrogen Dioxide-Ammonia Reactions, George Dillender Jr.
Masters Theses
"The purpose of this project was to study the rapid rate of reaction of nitrogen dioxide and ammonia and if possible to determine the mechanism of the reaction.
The author became interested in this project through his interest in rockets, jets, and the types of fuel that are used to propel them.
The prospect of using nitrogen dioxide and ammonia as a possible fuel was the basic reason for the selection of this project.
Very little has been done in the study of the reaction of nitrogen dioxide and ammonia, although the reaction seems to be a simple one.
How …
Serrated Wire For Welded Wire Fabric, Homer F. Thompson
Serrated Wire For Welded Wire Fabric, Homer F. Thompson
Masters Theses
"The Wire Reinforcement Institute, Inc., is concerned, primarily, with gathering data and technical information to substantiate the following:
- That welded wire fabric, when used as a reinforcement in concrete, distributes the stresses throughout the concrete slab, as has been maintained by engineers during the past 40 years.
- That welded wire fabric provides adequate crack control within the working limits of the fabric.
In order to efficiently accomplish Objectives 1 and 2 above, we wish to establish:
- The safe working stress that we can safely recommend for welded wire fabric -- both in bond and tension.
- The proper spacing of longitudinal …
Experimental Techniques In The Kinetic Study Of Rapid Gas Phase Reactions, William Dean Burch
Experimental Techniques In The Kinetic Study Of Rapid Gas Phase Reactions, William Dean Burch
Masters Theses
“In recent years chemical kinetics has assumed a prominent role in Chemical Engineering studies. While a considerable amount of data is available in the general field, very little is available for rapid gas phase reactions, i. e., reactions that are completed in from a few milliseconds up to a few seconds. Recently techniques have been developed for the measurement of the rate of such reactions.
With the advent of jet aircraft, the study of very rapid oxidation reactions becomes imperative. One such reaction that presents itself in this category is the oxidation of anhydrous ammonia in the vapor state by …
Clipper Amplitude Modulator, Durmuş Öcal
Clipper Amplitude Modulator, Durmuş Öcal
Masters Theses
"An amplitude modulated wave is defined as a wave form in which the amplitude of a sinusoidal signal (carrier) is varied in accordance with a modulating signal whose frequency is much lower than the frequency of the carrier signal. Numerous devices have been found for generating an amplitude modulated wave. In some modulators the amplitude of the carrier is actually varied in accordance with the modulating signal. In other types of modulators the carrier and the modulating signal are simultaneously applied to a nonlinear element or circuit. The output of this non-linear element is a distorted wave containing many frequencies. …
An Efficiency Analysis Of Underground Haulage In The Tri-State Mining District, Leroy King Wheelock
An Efficiency Analysis Of Underground Haulage In The Tri-State Mining District, Leroy King Wheelock
Masters Theses
"Purpose of Investigation: This study was undertaken to describe and analyze the system of haulage as practiced in mines of the Tri-State District by the Eagle Picher Mining and Smelting Company.
The investigation is concerned with all of the operations involved in moving the broken rock and is composed of three distinct procedures: loading, hauling, and hoisting.
One of the important items in the cost of mining is the movement of ore and waste to the surface for further disposition. Increased efficiency of transportation should introduce lowered production costs.
In this paper the efficiency of the present equipment and the …
Autographic Determination Of Thermally-Induced Linear Changes In Ceramic Bodies, William Dean Mckee Jr.
Autographic Determination Of Thermally-Induced Linear Changes In Ceramic Bodies, William Dean Mckee Jr.
Masters Theses
"The determination of changes in length of ceramic compositions as a function of temperature is frequently required in ceramic research and testing. With the use of an observer, excellent means are available for determination of changes in length over moderate ranges of temperature. However, the extended period required for some tests makes desirable the automatic recording of length change as a function of temperature.
There has been in use in the Ceramic Engineering Department a furnace arranged for determination of length changes; this furnace, shown in Figure 1, is so arranged that change in sample length causes linear displacement of …
An Economic Study Of The "C" Factor, David Hunter Robinson
An Economic Study Of The "C" Factor, David Hunter Robinson
Masters Theses
"After due consideration of the facts and hypothetical conditions enumerated herein, it was decided that this work would be devoted to developing a means of determining the most economical “C” factor to be used; one that will be consistent with ease of operating the plotting machine, the required accuracy of the finished compilation and economy. In other words, the highest value of the "C" factor that will produce results within the accuracy requirements under normal operating procedures.
As a secondary project, it was decided to plot a curve using points determined by analyzing a series of spot readings made at …
An Investigation Of End-Anchorage And Performance Of Sr-4 Strain Gages On A Prestressed Concrete Beam, Howard W. Nunez Jr.
An Investigation Of End-Anchorage And Performance Of Sr-4 Strain Gages On A Prestressed Concrete Beam, Howard W. Nunez Jr.
Masters Theses
"In recent years there has been brought to the attention of engineers and architects a new medium of construction---prestressed concrete. Reinforced concrete has long been recognized as a satisfactory material for use in the construction of buildings, bridges, highways, tanks and other structures. However, most concrete designers will concede that this material has many drawbacks. For instance, in a simple beam of rectangular cross-section, roughly only one half or the concrete is relied on to resist compressive forces. The tensile strength of the concrete is considered to be zero, and steel bars or rods must be inserted to carry the …
The Effect Of Grain Size On Shearing Strength Of Sand, Keyhan Samimi
The Effect Of Grain Size On Shearing Strength Of Sand, Keyhan Samimi
Masters Theses
"The object of this study is to determine experimentally the effect of definite grain size on the shearing characteristics of sandy soils. As it will be discussed in detail under the article - The Mechanics of Shear, the shearing characteristics of sandy soils depends on many factors such as grain size and shape, soil structure and relative density, the water content of soil. An attempt is made throughout the entire investigation to determine the effect of definite grain size on the shearing value and the angle of internal friction under the dry and saturated conditions. Furthermore, the results of shear …
Design Of A Galvanometer To Be Placed Within A Tubular Antenna For The Purpose Of Measuring Antenna Current Distribution, Ferdinand Henry Mullersman
Design Of A Galvanometer To Be Placed Within A Tubular Antenna For The Purpose Of Measuring Antenna Current Distribution, Ferdinand Henry Mullersman
Masters Theses
"The object of this paper is to design such a galvanometer for application to cylindrical UHF antennas and to discuss the procedure involving its use. The galvanometer will then be placed inside a completely isolated parasitic antenna and the distribution of current along the antenna will be measured"--Introduction, page 5.