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Application Of Statistical Methods To Evaluation Of Mineral Deposits, Francis R. Saupé

Masters Theses

"Only in recent years have statistical methods been applied to evaluation of ore reserves. An attempt is made in this study to prepare an outline to be followed throughout the exploration in order that statistical methods can be applied to valuation problems. Particular emphasis is given to the preliminary requirements to a statistical approach. Representative parameters, sampling pattern, and sample size are discussed in separate chapters"--Abstract, page iii.

The Effect Of Heating Chill Cast Eutectics, Robert Lewis Dreshfield

Masters Theses

"This investigation is the result of the author's specific interest in two phase systems. In the past, considerable work has been done investigating the alteration of eutectoid structures; however, eutectic structures have been neglected to a great extent. Tammann did some work on the subject in 1937 as did Brown and Guy in more recent times. In both of the above cases the eutectic structure was altered by cold working and subsequent heating of the alloy.

Tammann also noted that eutectics chill cast in liquid air display a vastly different structure than those cast under equilibrium conditions and that there …

Lattice Constants, Thermal Expansion Coefficients And Perfection Of The Phase Tio, Hsiung Wei Li

Masters Theses

"TiO is one of the intermediate phases in the titanium - oxygen system with a crystal structure of the sodium chloride type. The phase extends from about 22 to 29 weight or about 46 to 55 atomic percent oxygen. A comprehensive survey of the physical properties of the phase has been made in previous investigations (see review of literature), but only impure titanium was available at that time. Therefore, some revision of the measurements had to be made. Also, neither the thermal expansion coefficients nor the temperature at which the lattice constants were measured were reported.

For precision determination of …

A Preliminary Investigation Of Natural Gas Combustion As Applied To Thermal Recovery Of Petroleum, Roger J. Schoeppel

Masters Theses

"Present application of the subsurface combustion processes in the thermal recovery of petroleum afford favorable and opportune methods of providing greater recoveries from petroleum reservoirs. This study attempts to elucidate some of the parameters controlling the complex hydrocarbon oxidation for one such process. The experimental phase consisted of investigating the combustion behavior of eight nonexplosive and one explosive natural gas-air mixtures at low and intermediate pressures. The hydrocarbon was allowed to oxidize by self-ignition under controlled conditions within environments precluding a visible flame type reaction. Progress of the reaction was followed by measuring effluent oxygen content.

Experimental evidence indicate the …

Triaxial Testing Of Bituminous Mixtures : Technical Report, William Harner Goetz, James Hamilton Schaub

JTRP Technical Reports

No abstract provided.

Further Studies Of Deleterious Substances In Indiana Aggregates : Progress Report No. 2, Robert Lee Schuster

JTRP Technical Reports

No abstract provided.

The Determination Of Potassium In Cement With Tetraphenylboron, William Lee Dolch

JTRP Technical Reports

No abstract provided.

Laboratory Research On Pavements Continuously Reinforced With Welded Wire Fabric, Martin J. Gutzwiller, Joseph Lee Waling

JTRP Technical Reports

No abstract provided.

An Analysis Of High Accident Rates : Technical Paper, Harlan H. Blindauer, Harold L. Michael

JTRP Technical Reports

No abstract provided.

The Feasibility Of Measuring The Moisture Gradients In Concrete Pavement Slabs: Progress Report No. 2, J. Richard Bell

JTRP Technical Reports

No abstract provided.

The Effects Of Freezing And Thawing On Prestressed Concrete : Technical Paper, Fouad Elyas Musleh, Martin J. Gutzwiller

JTRP Technical Reports

No abstract provided.

A Laboratory Investigation Of The Phenomenon Of Friction As Applied To Fine-Textured Bituminous Paving Mixtures, Jack E. Stephens

JTRP Technical Reports

No abstract provided.

Annual Report Of The Assistant Director, 1958-1959, Harold L. Michael

JTRP Technical Reports

No abstract provided.

The Effects Of Freezing And Thawing On Pre-Stressed Concrete, Fouad Elyas Musleh

JTRP Technical Reports

No abstract provided.

Hydraulics Of River Flow Under Arch Bridges: A Progress Report : Technical Paper, H. J. Owen, Attila Arpad Sooky, S. T. Husain, J. W. Delleur

JTRP Technical Reports

No abstract provided.

Application Of The Hveem Stabilometer To The Testing Of Open-Graded Bituminous Mixtures, R. A. Hannan

JTRP Technical Reports

This laboratory investigation was conducted with the purposeof determining the applicability of the Hveem Stabilometer to the testing of open-graded bituminous mixtures.

The study was divided into two major sections. The first of these investigated the validity of the Stabilometer displacement measurement when applied to open-graded specimens having large surface air voids. The second portion of the study had two specific purposes: (l) to investigate the stress-strain characteristics of open-graded mixturestested in the Hveem Stabilometer and (2) to determine whether surface voids on the ends of Stabilometer test specimens influenced Hveem stability values.

To check the validity of the displacement …

The Effect Of Density On The Repeated-Load Strength Properties Of Bituminous Concrete, J. H. Dennis

JTRP Technical Reports

No abstract provided.

Studies Of Limestone Aggregates By Fluid-Flow Methods : Technical Paper, William Lee Dolch

JTRP Technical Reports

No abstract provided.

Estimation Of Highway Needs For County Primary Road Systems By Sample Survey Methods, Donald O. Covault, Harold L. Michael

JTRP Technical Reports

No abstract provided.

Generator Control System Employing Semiconductor Apparatus, Don Cronin

Mechanical and Aerospace Engineering Faculty Research & Creative Works

This invention relates generally to new and improved transistor control apparatus for controlling the excitation of rotary generators. In the field of transistor control of generators, especially where it is desired to control relatively large field excitation currents, the problem arises of obtaining suitable transistors having a sufficiently large current carrying capacity to properly control the current flowing in the generator exciting field. It has been found that the answer does not lie in paralleling two or more transistors directly, since only by extremely carefully matching of transistors or by utilizing auxiliary electronic components in the circuit can it be …

Some Properties Of Chrome-Magnesite Mixtures And Calcium Aluminate Cement-Magnesite Mixtures, Edward Charles Duderstadt

Masters Theses

"The knowledge of the physical and chemical properties of refractories is of great importance in determining their usefulness and application. The thermal expansion of refractories is of particular importance in that it affects the thermal stability of the product. A high coefficient of thermal expansion leads to greater spalling and destruction of the bricks in use. It is, therefore, desirable to develop compositions having low coefficients of thermal expansion. This investigation was undertaken (1) to determine some of the properties of chromite-magnesite refractory mixtures in an attempt to determine the optimum composition of these mixtures, the specific properties including thermal …

A Survey Of Industrial Arts In The Public Schools Of North Dakota, Milo Norman Sulentic

Dissertations and Theses @ UNI

The writer ahs been on the faculty of the State Normal and Industrial College at Ellendale, North Dakota since 1957. During this time he became concerned about the status of industrial arts in the public schools of North Dakota. Since instruction in industrial arts depends to a large extent on the facilities and equipment available for use by the individual teacher and the nature of the ship program, it would seem desirable for those colleges preparing industrial arts teachers to know the status of this subject area in the public schools of their state. Such information could be used to …

A Study Of The Recrystallization And The Mechanical Properties Of Indium, Louis John Reitsma Jr.

Doctoral Dissertations

"The recrystallization temperature and the mechanical properties of tensile strength, elongation, reduction in area and hardness were determined for 99.97% indium. Metallographic techniques were developed and stress rupture data were obtained.

Single crystals of indium were grown in a horizontal furnace with a traveling temperature zone, and sectioned in a strain-free manner, with an etch-cutter. Because of the low recrystallization temperature of indium, no further work was done on the single crystals.

The effect of recrystallization on electrical resistance, thermoelectric force, hardness, bending strength, crystallographic orientation and microstructure was studied. The range of recrystallization temperature for small amounts of cold …

Imperfections Within Ti₂O₃ And Tio₂ Phases In The Titanium-Oxygen System, Tatsuhiko Ejima

Doctoral Dissertations

“The hexagonal-rhombohedral Ti₂O₃ phase in the Ti-O system extends from 32.5 to 34.5% oxygen b.w., with the exact composition of Ti₂O₃ nearly in the middle of the phase. Seven samples of different composition within that phase were made, and the lattice constants (a and c) and the density of each sample were determined.

The plots of the constants against the composition of the samples revealed a deviation from Vegard’s rule when approaching the exact composition of Ti₂O₃. The lattice constants of this compound, obtained by graphical interpolation were; a_{25 …}

A Thermodynamic Study Of The Zirconium Sulfides, Andrew Hessler Larson

Doctoral Dissertations

"A hydrogen reduction technique was used to determine some thermodynamic properties of various zirconium sulfide phases. The equilibrium H₂S/H₂ ratios were determined as a function of temperature and composition of the condensed sulfide phases. The hydrogen sulfide content of the equilibrated gas mixtures was analyzed by an iodimetric titration procedure.

A detailed description is given for the method and apparatus used both in the preparation of the various sulfide phases and in their equilibration with a hydrogen-hydrogen sulfide gas mixture.

The composition ranger 59 to 67 atomic per cent sulfur was studied over a temperature range of …

An Amplitude-Stable, Fixed-Frequency Transistorized Power Supply, Bobby O. Allen

Electrical and Computer Engineering ETDs

The subject of this paper is the design of an ultrastable, fixed- frequency power supply capable of maintaining a high degree of amplitude stability over a wide range of resistive load values. The requirement for such a power supply originally arose in connection with the design of a particular piece of test equipment required by Sandia Corporation. No attempt will be made in this paper to justify or explain the necessity for the specified design criteria outlined in the following paragraphs other than to adequately define the design criteria.

Soviet Science And Engineering, Lewis F. Powell Jr.

Powell Speeches

No abstract provided.

Bridge Resurfacing With Silica Sand-Asphalt Mixture, Loren H. Strunk

Kentucky Transportation Center Research Report

The bituminous section has been engaged in testing silica sand-asphalt mixtures composed of various penetration grades of asphalt and sands from sand and sandstone deposits from several different areas of the state since early this year. The purpose of this study was to develop a surfacing mixture which would provide a skid-resistant surface and which could be machine laid in thin courses.

Science And Engineering In The Ussr, Lewis F. Powell, Jr.

Powell Speeches

No abstract provided.

Csr 381-1, Military Intelligence, Technical Intelligence Relationships, 12 November 1958., Us Army Chief Of Staff, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

This document was issued by the Chief of Staff to prescribe relationships between different officers in the Army staff. Specifically, it was inteded to “prescribe relationships between the Assistant Chief of Staff for Intelligence (ACSI), the Deputy Chief of Staff for Logistics (DCSLOG), and the technical Services in the field of intelligence activities.”

It was published as part of an attempt to solve an ongoing organizational problem: how to coordinate the intelligence activities of the US government.

In the 1950s, military intelligence was decentralized. There was no national-level military intelligence agency. In theory, the Chief of Staff and the army …