Digital Commons Network^™

Warping Stresses And Deflections In Concrete Slabs, Milton Edward Harr

JTRP Technical Reports

No abstract provided.

Earth Motion Beneath A Prescribed Boundary Displacement : Technical Report, R. C. Geldmacher, J. W. Dunkin, R. L. Anderson

JTRP Technical Reports

No abstract provided.

Methods For Water Resistance Of Bituminous Paving Mixtures : Technical Paper, William Harner Goetz

JTRP Technical Reports

No abstract provided.

Frictional Behavior Of Flat Sliding Surfaces, Elmer J. Weiter

Bachelors’ Theses

The objectives of this thesis are four in number. The first is to advance the basic understanding of the frictional behavior of materials in flat surface sliding, especially in the breakaway region where the coefficient of static friction is predominant. The second is to present an apparatus incorporating the use of flat contact surfaces, to provide accurate determination of the coefficient of static friction and some of the kinetic characteristics. The third is to establish a procedure of testing such that the static frictions is accurately analyzed to include variations with time and wear. The fourth objective is to establish …

Projecting With Space Journal, B. Spencer Isbell

Space Journal

No abstract provided.

Space Journal, Vol. 1, No. 1, Summer 1957, Rocket City Astronomical Association, Space Enterprises, Inc.

Space Journal

No abstract provided.

Vapor-Liquid Equilibria, Vincent De Paul Brown

Theses

The thesis was undertaken for the purpose of testing available experimental vapor-liquid equilibrium data for thermodynamic consistency, with a view to finding an intercorrelation of the activity coefficient-concentration curves, for different groups of systems, as a function of the intercepts. It was hoped that a correlation using molar volumes, parachor volumes, or molecular weights would be developed which could be explained on the basis of hydrogen bonding.

The Redlich and Kister^{1 equations were used to smooth the experimental data and to obtain values for the constants B, C and D. Redlich and Kister state that these constants serve as …}

A Study In Diffusion, Nicholas James Driscoll

Theses

The object of this thesis was to build an experimental apparatus and to study the diffusion of crystal violet in ethanol-water mixtures and diacetone alcohol-water mixtures. In order to validate experimental technique and to check the work of Mouquin Cathcart(1) who postulated compouhd formation in ethanol-water based on diffusion studies, experiments were conducted on the ethanol-water system in the area where compound formation was predicted.

In order to check the proposal of Konrad(2), based on studies of the heats of mixing that compound formation occurs between diacetone alcohol and water, studies were made on the diffusion of crystal violet in …

Kinetics Of Chromium-Hydrogen Ion Exchange, Frank Joseph Klosowski, Alfred John Meinhardt

Theses

In this investigation the rates of trivalent-univalent cation exchange in a stirred batch reactor for the chromic ion-Dovex 50 system have been measured. The progress of the reaction has been followed continuously by measuring the change in hydrogen ion concentration of the bulk solution as a function of time with a Beckman pH Meter having external electrodes immersed in the reaction mixture.

This work has been undertaken to determine the rate-controlling mechanism of the reaction, and the influence of agitator speed, particle size, and solution concentration on the rate of exchange. Agitator speed. studied, as limited by the equipment, are …

Equilibria In The Esterification Of Boric Acid, Richard William Palizay

Theses

A solvent extraction method was developed to determine the equilibria in the esterification of boric acid, In this method boric acid was reacted with various alcohols. After equilibrium was reached, the ester was isolated from the reaction mixture by means of a solvent and the amount of ester determined quantitatively. The equilibrium constants were then calculated for the reaction of boric acid with several alcohols.

Zone Refining Of Anthracene, Charles Poultney Perot

Theses

The process of zone refining involves the passage of a molten zone along a rod of solid. As the zone progresses, composition of the material freezing out generally differs from that melting, so solutes are redistributed. Enrichment of the major component occurs toward one end of the rod. (Usually the end of frozen.)

In the present work, impure anthracene was subjected to zone refining. Feed first run was C.P. anthracene with a known impurity of 2.0% phenanthrene. After two passes no phenanthren was detectable in the first layer frozen. (Analysis was by ultra-violet spectrophotometry.) Although the zones melted out were …

The Rates Of Hydrolysis Of Aryl Halides, Jack Robert Roeder

Theses

The object of this work was to determine the relative activity of the halogens, chlorine, bromine and iodine toward hydrolysis in a water-soluble aryl halide in which the halogen is activated by a nitrogroup in the orthoposition.

The order of activity was found to be C1) POI. In the case of the chlorine compound a run was also made on sodium 2-chloro-5-nitrobenzenesulfonate in which the nitro group is in a pare position with respect to the halogen.

The preparations of sodium or potassium 4-chloro-3-nitrobenzene sulfonate (I), sodium or potassium 4-bromo-3-nitrobenzene sulfonate (II), sodium or potassium 4-iodo-3-nitrobenzene sulfonate (III), and sodium …

Exchange Adsorption Of Electrolytes On Titanium Dioxide, Richard Algimantas Slepetys

Theses

During the manufacture of titanium dioxide pigments many processing steps are carried out in solutions of electrolytes. Adsorption of these electrolytes strongly affects properties of the finished pigments.

Adsorption of electrolytes Was studied on titania samples prepared by controlled neutralization of titanium tetrachloride solutions with ammonium hydroxide, and one sample of commercial sulfate process rutile titania. In analogy to zirconia--as reported by Kraus and Phillips?^22,23 titania also behaved as a weak anion exchanger in acid solutions and as a weak cation exchanger in basic solutions. Acid or base liberated was approximately equivalent to ions exchanged. On the best sample …

Self-Heating Of Wood Fiber, Kenneth Norman Smith

Theses

An investigation was made to determine what portion of wood is responsible for the self-heating of wood fiber, where self-heating is defined as the increase in temperature of a material above the temperature of its surroundings due to an exothermic reaction occurring within the material. The phenomenon of self-heating of wood fiberboard has long been known, but very little has been done to discover the particular part of the wood which generates the heat.

Wood fiberboard was tested for self-heating by placing a. cubical sample in a specially constructed furnace and heating it to a uniform temperature of 325?F. As …

The Design And Construction Of A High-Temperature X-Ray Sample Holder For Use With The Norelco Diffractometer, Jerry F. Koon

Bachelors Theses and Reports, 1928 - 1970

The purpose of this paper is to describe the design and construction of a sample-holder for high-temperature x-ray diffraction work. This sample-holder will be used in conjunction with a Norelco Diffractometer. Design of this attachment is such that it will meet certain limitations, which will be presented in detail, offered by the diffractometer.

Aryl Sulfonation In Presence Of Phosphrous Trichloride, William Calvert Tanner

Theses

With sulfuric acid as the sulfonating agent, phosphorus trichloride is demonstrated as being effective in facilitating the sulfonation of some aromatic compounds. Optimum conditions are a molar ratio of 0.5 mole of sulfuric acid: 1.0 mole of aromatic compound with 4 - 5% more phosphorus trichloride than is required to react with the available water in the system, and reaction temperatures between 50°C. and 60°C.

The aromatic compounds studied were benzene, chlorobenzene, bromobenzene, and nitrobenzene.

The Use Of Perlite As An Adsorbent, John Herrick Eigler

Theses

The adsorptive properties of perlite, an expanded volcanic glass, have been studied. Several activating treatments were investigated, air oxidation it 400 degrees Centigrade appears to be the best, The adsorption of the basic dye emethylene blue yields a saturation valve of 50 milligrams per gram of perlite. The acid dye cotton blue showed no measurable adsorption. A maximum adsorption of 15 millimoles of acetic acid and one milligram of iodine were found in aqueous solution. A high value of 1.33 milligrams of iodine per gram of perlite were found in methyl alcohol solutions. The surface area of perlite appears to …

The Vacuum Desulphurization Of Copper Mattes, Robert L. Trevison

Bachelors Theses and Reports, 1928 - 1970

The first application of vacuum techniques to the metallurgical industry was made in the early part of this century by Rohn, a German, who developed vacuum technology to a production status in the specialty metals business. Although extensive use of vacuum processing technology was made in the lamp and electrical industries, the methods used were considered to be impractical up to about ten years ago even though remarkable improvements were made during World War II. Wartime demands for magnesium and for uranium which necessitated the use of a high vacuum in their production led to the perfection of mechanical pumps, …

Shaft Mucking Investigation Part 2, Jorge R. Delzo

Bachelors Theses and Reports, 1928 - 1970

By use of several digging principles, such devices as scrapers, clamshells, power shovel loaders, etc., have been perfected. The net results have been an almost complete elimination of hand mucking, an increase of loading speed, and a reduction of sinking costs. Moreover, the elimination of hand mucking has had a favorable psychological effect on the crew, as well as saving physical effort for the other phases of the shaft-sinking cycle.

Diamond Drilling Equipment, William R. Cox

Bachelors Theses and Reports, 1928 - 1970

Diamond drilling is based on the extreme hardness of the diamond enabling it to cut or abade rocks, minerals or other materials found in the earth's crust, or that may be manufactured by man.

Open Pit Mining Operations, James A. Simon

Bachelors Theses and Reports, 1928 - 1970

This report on open pit mining operations will discuss: the history of open pit mining, factors important in the selection of open pit mining and in the development of an open pit, and the various mining and operational methods used in this type of an operation. Stripping coal mining operations will be discussed but the majority of the report will be on open pit metal mines.

An Investigation Into Salt-Bath Heat Treatment For Titanium, Robert Fred Bechtold

Bachelors Theses and Reports, 1928 - 1970

Titanium, although possessing excellent corrosion resistance in some media, is severely attacked by molten inorganic salts such as those employed in heat-treating baths. Since titanium undergoes allotropic changes, many of its alloys are amendable to heat treatment. The purpose of this study was to discover a salt (or other suitable medium) in which titanium alloys can be successfully heat treated without fear of corrosion.

Temperature Forecasting At Logan, Utah, For The Snowmelt-Runoff Season, Clifton Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this thesis is to investigate the practicability of forecasting temperatures for the spring and summer snowmelt-runoff season. A successful temperature forecast for Logan, Utah, would be useful in studies of Logan River streamflow, as well as other related applications.

Logan, Utah, is situated in a region where the snow accumulates during the winter and early spring at high altitudes and remains until the proper sequence of meteorological events provides the thermodynamic conditions essential for melting. Snow surveys provide an index to the water available on a watershed. Temperature conditions during the melt period largely determine the available …

Initial Bibliography Of Soviet Military Medicine, 1917-1950, Medical Information And Intelligence Agency, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

This is a author list of more than 1000 articles about Soviet military medicine with a subject index.

This compilation is an initial listing of Soviet military articles, less specialized naval and aviation topics, from the time of the Bolshevik Revolution to the outbreak of the Korean conflict as they appeared in the Quarterly Cumulative Index, Volumes 1-11 and the Quarterly Cumulative Index Medicus, Volumes 1 - 55.

The subject headings searched are listed below and constituted 20,167 entries for this thirty three year period. 887 of these entries were of Soviet origin and comprised the publications of the 1,025 …

Shaft Mucking Investigation Part 1, Jorge R. Delzo

Bachelors Theses and Reports, 1928 - 1970

This paper represents an attempt to explain the operation of inclined-shaft mucking, and the machines developed for this purpose. It also covers some research done for the design of a continuous shaft mucking device, which could in the future prove to be the answer to this important problem. In many small or intermediate mining operations, where this problem has been a prime headache, the added costs of shaft mucking, because of lack of speed, and versatility, might very well mean the difference between profit and collapse.

Highway Highlights Of 1956 And The Challenge Ahead : Technical Paper, Arthur K. Branham

JTRP Technical Reports

No abstract provided.

Separation Of Iron-Tin Alloys Using Gas-Solid Reactions, Carl Richard Bieling

Masters Theses

"For years it has been a problem to the tin smelting, plating, and detinning industries to be able to separate iron from tin once they were associated together as described above. Due to the lack of a tin smelter in the United States in the past, and the abundance of tin scrap available, which had little value either for the iron content or the tin content in their untreated state, most interest was concentrated on seeking methods of separating this tin scrap into its two useful components, iron and tin, rather than deal with the problems of smelting tin from …

The Correlation Of Kelly Ball Penetration Readings With Standard Slump Cone Readings For Concrete Made From Missouri Aggregates, James Claude Rives

Masters Theses

"The ASTM standard slump test as set forth in ASTM Designation: C143-52, has been used for many years in concrete construction tor measuring the consistency of plastic concrete. Slump tests taken in the laboratory are considered reasonably accurate; however, there are numerous disadvantages in performing these tests in the field; the most serious being the time required to make a test on pavement work. The standard slump cone method is also subject to personal differences in sampling, rigidity and smoothness of base, dampening the apparatus, filling the cone, rodding, raising the cone, freedom from jarring and selection of point to …

A Determination Of The Sonic Modulus Of Early Age Concrete, William Dale Nelson

Masters Theses

"The problem which the writer is analyzing in this thesis was suggested by Professor E. W. Carlton of the Civil Engineering Department. It is a determination, by use of sonic testing equipment, of the growth in the sonic modulus of early age concrete.

Since 1938 when T. C. Powers published his paper, "Measuring Young's Modulus of Elasticity by Means of Sonic Vibrations", in the proceedings of the American Society of Testing Materials, Vol. 38, Part II, a great deal of work has been done on the applications of sonic testing of concrete. It began a new era in concrete testing, …

Filter Materials For Emergency Use In Diatomite Type Water Filters, Robert Wassell Mcleane

Masters Theses

"A completely different type of filter, using diatomaceous earth as the filter media, had been in use for many years for filtration of industrial liquids, however, the use of diatomaceous earth for water filtration purposes had been discouraged due to the rapid clogging of the filter material. "As late as 1930 it was reported that the very excellence of filtration with diatomite prevented its extensive use in water filtration except where complete elimination of bacteria and suspended matter is essential.”

Diatomaceous earth, however, seemed to exhibit the general properties the research groups were seeking; in the refined state it exhibited …