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- <p>Drilling platforms -- Design and construction<br />Oil well drilling rigs -- Mexico (1)
- <p>Helicopters -- Control systems<br />Rotors (Helicopters) -- Dynamics -- Mathematical models</p> (1)
- <p>Levees -- Design and Construction<br />Earth dams -- Design and Construction<br />Seepage</p> (1)
- <p>Lithium<br />Tungsten bronze<br />Chemical structure<br />Solubility<br />Lattice dynamics</p> (1)
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- <p>Right of way -- Standards -- United States<br />Right of way -- United States</p> (1)
- Adhesion<br />Enamel and enameling<br />Oxides -- Thermal properties<br />Wetting agents -- Testing (1)
- Air flow -- Mathematical models<br />Mine ventilation -- Measurement (1)
- Automobiles -- Motors -- Knock<br />Spark ignition engines -- Ignition<br />Spark ignition engines (1)
- Automobiles -- Wheels -- Balancing (1)
- Barite -- United States<br />Barite industry -- United States (1)
- Barium<br />Thermal analysis<br />Tin alloys<br />X-ray spectroscopy (1)
- Borates<br />Glass manufacture<br />Soluble glass (1)
- Bricks -- Expansion and contraction<br />Bricks -- Thermal properties<br />Silica<br />Titanium dioxide (1)
- Cathodes -- Analysis<br />Direct current amplifiers<br />Electric circuit-breakers, Vacuum<br />Vacuum arcs (1)
- Caving mining<br />Limestone -- California -- Riverside County (1)
- Cement<br />Oil well cementing (1)
- Chemical equilibrium<br />Copper-titanium alloys<br />Titanium -- Metallurgy (1)
- Chemical reactions<br />Silver -- Electrometallurgy<br />Thiocyanates (1)
- Color in the ceramic industries<br />Solutions, Solid (1)
- Concrete -- Cracking -- Prevention<br />Pavements, Concrete -- Cracking -- Prevention<br />Reinforced concrete -- Cracking (1)
- Copper -- Metallurgy<br />Crystals<br />Powder metallurgy (1)
- Curriculum planning<br />Geological Survey (U.S.)<br />Traverses (Surveying) (1)
- Drilling and boring machinery -- Testing<br />Torque -- Measurement<br />Twist drills (1)
- Elastic analysis (Engineering)<br />Pressure -- Mathematical models<br />Tubes -- Reliability (1)
- Electric circuits<br />Electric networks -- Mathematical models (1)
- Electric displacement<br />Electronegativity<br />Metal coating (1)
- Electric power consumption -- Measurement<br />Scrapers (Earthmoving machinery) (1)
- Electronic circuit design<br />Phasemeter -- Design and construction<br />Phasemeter (1)
- Emulsions<br />Gelatin<br />Isoelectric focusing (1)
Articles 1 - 30 of 47
Full-Text Articles in Engineering
Study Of Oil Well Squeeze Cementing Operations, Arthur Wellesley Walker
Study Of Oil Well Squeeze Cementing Operations, Arthur Wellesley Walker
Professional Degree Theses
"A study of the literature and field operations indicates conclusively that squeeze cementing operations are performed almost exclusively as corrective measures in completing or working-over wells. The most common use is to correct for faulty cement operations during original well completions. Careful study of field operations indicate that in most cases formations are broken-down at pressures far less than that required to lift the overburden, and that large quantities of drilling mud and cement may be pumped into the well (and formations) at pressures less than that of the overburden. Analyses of the forces indicate that the formations will be …
Recommended Procedure For The Computation Of Rights Of Way, Leon Hershkowitz
Recommended Procedure For The Computation Of Rights Of Way, Leon Hershkowitz
Professional Degree Theses
"This thesis sets forth a recommended procedure for the computation of areas included in "rights of way," using the principle of double meridian distances.
For a considerable number of years, it has been the opinion of the author that steps should be taken to arrive at some form of standardization in the procedures necessary in the computation of areas involving right of way and to more or less standardize legal descriptions pertaining thereto.
One need only examine the records of the various County Recorders in one particular state or in different states and he would be entirely convinced that such …
Research Investigation Of Seepage Control For Dams And Levees, Robert Raymond Brookshire
Research Investigation Of Seepage Control For Dams And Levees, Robert Raymond Brookshire
Professional Degree Theses
"The problems of a century old levee system have provided excellent research for the Corp of Engineers and others in the design and construction of earth dams for flood control, navigation and multi-purpose projects. A special problem on which valuable knowledge has been gained is that of seepage control. The experiences obtained in recent years have been supplemented by theoretical developments in the field of soil mechanics, but it is believed that considerable information will be gained on seepage control from further investigation and experience.
The safety factor to prevent failure from seepage is believed to be the most critical …
The Effect Of The Convection Coefficient On The Temperature Amplitude In Periodic Heat Flow, Gordon L. Scofield
The Effect Of The Convection Coefficient On The Temperature Amplitude In Periodic Heat Flow, Gordon L. Scofield
Masters Theses
"The problem to be investigated in this thesis is that of periodic heat flow in a semi-infinite solid. Periodic flow means that heat flow is a continuous function of time and repeats itself at regular intervals. A semi-infinite solid is one which is bounded by one and only one plane. This subject has received considerable attention in the field of soil temperatures, both at the surface of the earth and at various depths. The surface of the earth is subjected to temperature changes which are nearly periodic. These temperature changes take place both daily and annually. A knowledge of these …
Analytical Investigation Of Thin And Moderately Thick-Walled Tubing Under Peripheral And Biaxial Loading, Frank Joseph Cizek
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 …
Effect Of Transition Elements On The Transmittance Of B₂O₃ Glasses, Chandubhai Gordhanbhai Amin
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, …
Preparation Of Copper Single Crystals By Means Of Powder Metallurgy Methods, Wei-Kung Chang
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, …
Caving Procedure At The Crestmore Limestone Mine Of The Riverside Cement Company, Riverside County, Calif., Randall Helt Wightman
Caving Procedure At The Crestmore Limestone Mine Of The Riverside Cement Company, Riverside County, Calif., Randall Helt Wightman
Professional Degree Theses
"The following paper describes current mining practices of the Riverside Cement Company at its Crestmore Mine, Riverside, California. For a number of years the Riverside Cement Company obtained its raw materials by surface quarry operations, but after these deposits were exhausted for equipment available at that time, the Company started underground mining. Mine workings were begun in 1927 to 1930 for the recovery of limestone by block-caving methods"--Introduction, page 1.
Design And Construction Of An Electronic Gain-Phase Meter, Gabriel G. Skitek
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 …
An Investigation Of An Electronic Ignition System For Internal Combustion Engines, Richard David Wheat
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 …
A Correlation Of Formulas For The Flow Of Fluids In Pipes, John Gorman Duba
A Correlation Of Formulas For The Flow Of Fluids In Pipes, John Gorman Duba
Masters Theses
"At present there exist two quite distinct fields in fluid flow in pipes, the one in water supply and the other in the petroleum industry. It is the purpose of this paper to discuss the various pipeline flow formulas as used in both fields and to correlate the exponential type formula which is much used in practice with the Nikuradse curves obtained in the laboratory"--A Brief Historical Review, page 5.
A Study Of The Gelation Of Air-Setting Refractory Mortars, James Irving Mueller
A Study Of The Gelation Of Air-Setting Refractory Mortars, James Irving Mueller
Doctoral Dissertations
"Three basic mortar formulae were used in this investigation, each mix having some different materials present and each having its own gelling characteristics. The study was directed along the theory that the dry materials used play an important part in the hardening. Certain admixtures were tested and several were found to improve the workability after storage. The presence of additional sodium ions in the mortar was found to be helpful in overcoming the gelation but these tended to lower the refractoriness of the mortar.
A study was made of the base exchange capacities of the dry materials and the material …
Torque Characteristics Of High Speed Steel Twist Drills, Tien Chi Lee
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 …
Efficiency Of Various Types Of Reinforcement In Controlling Opening Of Cracks In Concrete Pavements, Frederick Richard Heartz
Efficiency Of Various Types Of Reinforcement In Controlling Opening Of Cracks In Concrete Pavements, Frederick Richard Heartz
Masters Theses
"To date very little work has been done on the subject of the amount of crack opening for different loads on concrete pavement. It is a known fact that these cracks must be held together sufficiently to have aggregate interlocking action if the pavement is to transfer loads from one edge of a crack to the other. The maximum permissable [sic] opening has been set at .027 inches by the Highway Research Board. The author has attempted in this investigations (1) to determine the effect of different spacing and different sizes of longitudinal and transverse wires in controlling crack opening …
X-Ray Investigations Of The Metal Deposits Resulting From The Electrochemical Displacement Process, Cheng Chih Fang
X-Ray Investigations Of The Metal Deposits Resulting From The Electrochemical Displacement Process, Cheng Chih Fang
Masters Theses
"The principle of electrochemical displacement has been well established in the science of chemistry and applied as a commercial process in some metallurgical processes, such as the cementation process and the immersion method of metal coatings. According to the EMF series of the metals, the upper, the more electronegative metal,* (*Here the term of 'electronegative' means the metal possessing high electrolytic solution pressure and going into the solution with the formation of positive ions. Some authors preferred to use 'electropositive' instead of 'electronegative', referring to the ions which are electropositive during dissolution.) will displace the lower, the more electropositive one, …
Comparative Study Of The Collecting Property Of Naphthenic Acids With Oleic Acid As Applied To Calcite, Hematite, Barite, And Fluorspar, Siddhi Nath Mukherji
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
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 …
Interrelationship Of Transverse Anchorage And Adhesive Bond In Welded Wire Reinforcement, Alan Arthur Becker
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 …
Effect Of Titanium Dioxide As A Mineralizer In Silica Brick, Henry Clay Brassfield
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 …
The Effect Of Silicate Ion And Hydroxyl Ion On The Abstraction Of Potassium Ethyl Xanthate By Galena, Pao-Zung Wu
The Effect Of Silicate Ion And Hydroxyl Ion On The Abstraction Of Potassium Ethyl Xanthate By Galena, Pao-Zung Wu
Masters Theses
"The purpose of this research was to investigate the effect of the silicate ion and the hydroxyl ion on the removal of potassium ethyl xanthate by galena; since the former ion is encountered during flotation owing to dissolution of silicates, and also sodium silicate being often used to disperse gangue minerals, and the latter one is encountered during floating in an alkaline circuit"--Introduction, page 1.
The Electrolytic Recovery Of Silver From Waste Silver Residues, Bailey Warren Hagar
The Electrolytic Recovery Of Silver From Waste Silver Residues, Bailey Warren Hagar
Masters Theses
"A considerable amount of silver is contained in the silver chloride-silver thiocyanate residue resulting from the use of silver nitrate and potassium thiocyanate by students of quantitative analysis in the volumetric determination of chlorine. The main objective of work described in this paper, therefore, was to find a simple and efficient method for recovering the silver from this silver chloride-silver thiocyanate residue...it was hoped that the experimentation described in this paper might also result in the design of inexpensive equipment which might be used by the small photographic shop"--Introduction, page 1-2.
Treatment Of Zinc Crusts By Vacuum Distillation, Chang-Hsu Shih
Treatment Of Zinc Crusts By Vacuum Distillation, Chang-Hsu Shih
Masters Theses
"The purpose of this research is to investigate the possibility of obtaining reasonably pure silver from the zinc crusts by vacuum distillation in one step. The effect of temperature, pressure, particle size, and time of distillation will be determined. The behavior of other constituents in the crusts are also to be studied"--Introduction, page 5.
A Study Of Cathode Drift Compensation In D-C Amplifiers, Joseph W. Rittenhouse
A Study Of Cathode Drift Compensation In D-C Amplifiers, Joseph W. Rittenhouse
Masters Theses
"The expression, cathode drift, has to do with the random variations in vacuum tube plate current which are attributable to similar variations in emission velocities of electrons leaving hot cathodes. The fact that these random current changes appear to result from spurious drifts in cathode potential, since all other electrode potentials are unrelated to them, give rise to the expression, cathode drift...The problem with which this paper is concerned is a study of some of the possibilities of compensating for cathode drift effects in a single amplifier stage. Specifically, this paper will: (A) present a detailed mathematical and graphical analysis …
Evaluation Of Quenching Media Using The End-Quench Hardenability Test, Subodh C. Das Gupta
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 …
The Theory Of Limit Design As Applied To The Design Of A Continuous Beam Over Three Supports, Robert F. Davidson
The Theory Of Limit Design As Applied To The Design Of A Continuous Beam Over Three Supports, Robert F. Davidson
Masters Theses
"The theory of Limit Design is the application of the theory of Plasticity to the estimation of the actual carrying capacity of a structure. In this theory, as it is applied to statistically indeterminate structures, the areas of most unfavorable stress are allowed to be stressed beyond the yield point and into the plastic range of stress. It was formerly held that, by assuming elastic behavior, all questions of strength of materials that concern the Structural Engineer were capable of solution. However, it is now becoming recognized, from actual measurements of deformations of structures and from tests carried to near …
An Investigation Of The Production Of Multicarbide Of Tungsten And Titanium From Wo₃ - Tih₂ - C Mixtures, Chi-Mei Hsiao
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 …
A Study Of The Power Consumption Of Mine Scrapers, Stanley Francis Johnsen
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 …
Reduction Of Zinc Sulphide In A Vacuum, Tien-Shih Liu
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 …
Aerodynamic Research For An Improved Rotor Control System On Helicopters, Delmar Wallace Breuer
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 …
The Barite Industry In The United States, James Byron Chaney
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 …