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Influence Of Quartz Particle Size And Concentration On The Fracture Stresses Of Triaxial Alumina Porcelain., John David Weyand

Masters Theses

"Quartz particles were introduced into a typical triaxial alumina porcelain. Three levels of particle size and three levels of concentration were studied. The strength sample sizes were large. A diametral- compression loading method was used for strength testing. It was found that the porcelain strength decreased with increasing grain size and concentration of quartz particles. A linear relationship existed between log quartz concentration and mean fracture stress"--Abstract, p. ii

Fourth Annual Performance Survey Of Reinforced Concrete Pipe Culverts, Ronald D. Hughes

Kentucky Transportation Center Research Report

A stylized, rational criterion for the structural design and installation of reinforced concrete pipe culverts was developed by the Bureau of Public Roads in cooperation with Prof. M. G. Spangler of Iowa State College and the American Concrete Pipe Association and was distributed to the various state highway agencies, April 4, 1957, as Circular Memorandum 22-40.* The criterion was intended to bring together and simplify methods for computing the strengths required for various fill heights and conditions of bedding. The several highway agencies were urged to adopt the criterion for use on all Federal-aid projects and accordingly, the Kentucky Department …

Test 864: Wagner Fwd Wa4 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 862: Minneapolis-Moline U302 (Gasoline), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 867: Zetor 4011 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 865: Case 750 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Calibration Of Irrigation Headgates By Model Analysis, Gaylord V. Skogerboe, Vaughn E. Hansen

Reports

Introduction

The purpose of this research project was to calibrate the slide gates used by the D.M.A.D. Company (Delta, Melville, Abraham and Deseret Irrigation Companies). These gates, which number more than 600, are located throughout the distribution system. Each gate is placed in a concrete box 4 feet wide, 3-1/2 feet deep and 4 feet long. The structure is used as a means of diverting the water and is also used as a measuring device.

A similar structure, but with a different type of slide gate, was calibrated in 1914. At the time rating tables were prepared which listed the …

Radiation Characteristics Of A U-Slot Antenna., Richard Paul Brueggemann

Masters Theses

"The radiation equations for a simple rectangular slot antenna are derived as a function of the field distribution in the slot. The electric field distribution in the slot is then formulated as a function of the aperture dimensions. The U-shaped slot antenna is described as an extension of the rectangular slot theory and the actual field is measured in the slot for comparison.

The far field equations a.re derived for the U-slot antenna similar to those for the rectangular slot antenna and are evaluated using the formulated distributions in the slot for antennas of two different electrical sizes. The equations …

Test 868: Case 1200 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

A Laboratory Model Study Of Fluid Cross Flow., James Gary Fore

Masters Theses

"A procedure for scaling and operating a laboratory model for the purpose of studying fluid crossflow between zones of different permeability is presented. A modified existing model is used to simulate conditions for three dimensional, incompressible, two-phase flow through a two-layer, unconsolidated, homogeneous porous medium.

Eight tests were made to show effects on crossflow between the zones. Qualitative results indicate crossflow from the high to the low permeability zone for various perforation ratios and mobility ratios"--Abstract, p. ii

Investigation Of Inoculant Effect On Cast Iron, Darrell W. Donis

Masters Theses

"An assumption was made that extensive holding time of an inoculated gray iron melt would result in a loss of physical properties of castings poured from this melt. This theory was examined in both a literature search and by testing and conclusions drawn from these findings are presented and discussed. Although there is a great deal of data available which discusses inoculants and their effects, very little mention is made of the effect of holding time in any of this material. The results indicate that holding time is of considerable importance when dealing with inoculated iron, and that calcium silicon …

Ignition Time Lag: A Measure Of Explosive Energy Release, Paul H. Rydlund

Masters Theses

"By means of the resistance-element, or probe-wire, detonation-velocity measurement technique, explosive reactions from various blasting agents were studied. To reduce the number of variables, only standard AN-FO 94/6 mixtures were used, as are commonly employed today in constructions and mining operations. Accuracy of the data obtained was excellent, and the method proved itself not only relatively simple to operate but versatile in providing considerable information under many testing conditions. Studies of test records revealed the presence of a time-lag frequently occuring [sic] after primer detonation. Environmental factors such as confinement, charge diameter, primer size and energy content, and surface coatings …

Thermal Resistance Of Bonds And Contacts, David Marion Lewis

Masters Theses

"The adhesive and sealant Industry has more than kept pace with our rapidly expanding technology of today. This growth has left the standardization of data on adhesives far behind and lack of this data is obvious. Of the many applications, particularly as related to space technology and energy conversion, the resistance to the flow of heat offered by the bond layer is of considerable importance.

Little information is available on the effect of adhesives on heat transfer. In connection with their work on honeycomb panels, Rankle, Gier, and Bevans (7) determined the thermal resistance of the particular type of adhesives …

The Indole Acetic Acid Oxidase Of Hygrophorus Conicus., Dilip N. Patel

Masters Theses

"The purpose of this investigation was to determine an assay method for measuring the activity of the indole acetic acid oxidase present in Hygrophorus conicus. This enzyme converts tryptamine or indole acetic acid (IAA) into oxindole acetic acid (OIAA).

An assay method for measuring the activity of the enzyme was developed based on the spectrophotometric measurement of tryptamine, IAA, and OIAA. Several other assay methods were tried. The colorimetric method of Gordon and Weber ^(l4) was found to be useful for a quantitative determination of IAA and was insensitive to OIAA. Paper chromatography proved to be useful as a qualitative …

A New Method For The Evaluation Of Metal Primers., Bhalchandra Dave

Masters Theses

"Corrosion is the destructive attack of metal by chemical or electrochemical reaction with its environment. Rusting is usually the term applied to the corrosion of iron-base alloys with formation of corrosion products consisting largely of hydrous ferric oxides. Non-ferrous metals therefore, corrode but do not rust. ^(l4) More than 40 per cent of the world's production of steel and iron is destroyed by rusting which costs about six billion dollars every year. In 1954 the American Petroleum Industry, Subcommittee on Corrosion, published a preliminary estimate that corrosion was costing 2 the petroleum refining industry between eleven and nineteen cents per …

The Effects Of Granular Size On The Thermal Conductivity Of Sand, Kanubhai M. Patel

Masters Theses

"The thermal conductivity of granular materials can be determined by the Thomas method. This method was used here to determine the effects of granular size on the thermal conductivity of sand. A river sand was secured and screened. The sand retained between the Tyler Standard Screen Scale, mesh 10 and 14, 14 and 28, 28 and 40, 40 and 48, 48 and 60, and below mesh 60, was used for tests.

The thermal conductivity for the above six samples obtained by the author coincide fairly well with published data.

It is reported in the International Critical Tables that the thermal …

Optimum Zero-Memory Nonlinear Filter, Benjamin Shaw-Hu Wang

Masters Theses

“The purpose of this report is to review the basic work described by Zadeh insofar as systems of class N₁ are concerned and to apply his general results to a specific problem in which a non-linear filter is mandatory simply because the linear filter is essentially ineffective. The ineffectiveness stems from the fact that the autocorrelation function of the signal plus the noise has essentially the same variational character as the signal alone. Therefore, the transfer function of the linear filter turns out to be simply a constant. Thus, the output of the linear filter is just an attenuated …

A Laboratory Study Of The Effect Of Wettability Of Residual Oil Saturation In Artificial Cores., Socrates Nicholas Potamianos

Masters Theses

"In the past much emphasis has been placed on various studies of reservoir rock and fluid surface properties and their relation to the different oil recovery processes. Several laboratory methods (1, 2, 3) ^l/have been used by different investigators to obtain a more fundamental understanding of the many factors which have an influence on the oil recovery from reservoir rocks"--Introduction, p. 1

Design, Construction And Characterization Of A 10-Liter Batch Pilot Plant Fermentor., Sylvester Ogden

Masters Theses

"A 10-liter batch type pilot plant fermentor has been designed and constructed. The design incorporated most of the desirable features of previous designs reported in the literature.

The stainless steel fermentor has a multi-speed agitator and aeration rates as high as 15 cubic feet per hour. Temperature indicating, temperature controlling, pH measuring, and automatic foam controlling systems are included in the design.

Sulfite oxidation rates have been determined for the unit at 15 operating conditions. A maximum sulfite oxidation rate of 1060 millimoles of oxygen per liter per hour has been obtained.

Fermentation using a Torulopsis utilis yeast culture has …

Investigation Of Zero Sidesway For Rigid Frames, Dolatray S. Mehta

Masters Theses

"This study was made to determine the location of a point at which a vertical load may be applied to a rigid frame structure and produce zero sidesway, the so called zero sidesway axis. For concentrated loads equations have been derived for zero sidesway. For uniform and triangular loads graphs showing zero sidesway for various ratios of column and beam stiffnesses and height ratios have been plotted"--Abstract, page ii.

The Characteristics Of Radial Strain Propagation Induced By Explosive Impact In Jefferson City Dolomite., Choon K. Quan

Masters Theses

"Blasting effects depend largely on peak radial strains propagated in rock media by explosive impact. To improve blasting design and control of secondary effects (e.g., structural fatigue), an equation for peak radial strain propagation induced by explosions was developed as follows: Emax = K e^-αr /r

An instrumental technique was designed to test the validity of the equation in the Jefferson City dolomite. Results showed ii that for 1-lb charges of 60% ammonia-gelatin explosive, peak strains, at any distance r, were reduced in amplitude in accordance with an exponential decay function of the type Emax = 281 e^{-0.026r …}

Microscopic Observations On Etched Surfaces Of Zinc Single Crystals And On Anodic Disintegration., Yun Wang

Masters Theses

"The technique used to grow single zinc crystals was based on the Bridgman method. Zinc-gold, zinc-aluminum, and zinc-magnesium alloys were prepared and their single crystals were grown. Four crystallographic planes of the single zinc crystals were used for both chemical and anodic etching. The zinc alloys were etched more easily by acids than the purest (99.999%) zinc. The etching patterns changed for the different crystallographic planes of the single zinc crystals.

The appearance of particles during anodic dissolution of the single zinc crystals depended on time, acid concentration and current density. The partial disintegration of single zinc crystals is promoted …

The Effect Of An Induction Field On Transducers., Ratilal S. Patel

Masters Theses

"This report presents the results of an experimental investigation on the effect of an induction field on transducer output. Various types of transducers; strain gages, thermocouples, and thermistors, were used. The changes in the output of these transducers were measured for various induction field conditions.

Measurements must often be made where strong electrical fields are present. Strain gages are used to measure the stresses in electrical machinery. Thermocouples and thermistors used for measuring the temperature of materials undergoing heat treatment with an induction heater are also subjected to an induction field.

The general experimental procedure was the same throughout the …

Stiffness Of Lightweight Reinforced Concrete Beams, Rameshchandra H. Patel

Masters Theses

"This work is a presentation of the findings of an experimental measurement of stiffness (El) for reinforced and nonreinforced lightweight and normal concrete. The experimental values of stiffness are compared with values obtained using standard reinforced concrete theory. In all, thirty beams, fifteen for lightweight and fifteen for normal concrete, each having the compressive strength of approximately 4, 500 psi, were tested. In addition to stiffness measurements, a relationship was obtained between the dynamic modulus of elasticity and the ultimate compressive strength at various ages for the particular lightweight concrete used"--Abstract, page ii.

Influence Of The Heat Release On Thermodynamic Characteristics Of Diesel Engines., Shirish Amritlal Desai

Masters Theses

"A Diesel. engine is an internal. combustion engine in which the fuel. is ignited by the heat of compression. Thus, the Diesel. engines are known as compression-ignition (C.I.) engines. The engine received its name: from its inventor, Dr. Rudolf Diesel., who in 1893 published a book under the title, '' Theory and Construction 0£ Rational. Diesel Engine". The first successf'u1 Diesel. engines, using liquid: fuel., which was injected into the cylinder by a blast of high-pressure air, were manufactured by the M.A.N. Company of Germany in 1895"-- Introduction, p. 1

Effect Of Poly-Ethylene Glycol, A Non-Shrinking Agent, On Strength Properties Of Concrete., Vasantrai Vallabhbhai Desai

Masters Theses

"This thesis describes laboratory test made on plain concrete cylinders and ~earns for compressive strength, flexural strength, durability and shrinkage, using poly-ethylene glycol (ElOOO) as a non-shrinking admixture. The tests were conducted in the Materials Laboratory of the Civil Engineering Department.

The test results show that poly-ethylene glycol has the effect of reducing the compressive and flexural strength of plain concrete. The admixture also has the effect of reducing shrinkage, and reversing it, causing expansion with large percentage of its use. For the number of cycles of alternate freezing and thawing reported the admixture did not have any effect on …

Artifact Filter., Kent William Swearingen

Masters Theses

"Peripheral blood pulse monitors are highly susceptible to noise-artifact-- in their present stage of development. The purpose of this thesis is to demonstrate a feasible means for filtering the artifact, using existing monitors. Since no peripheral pulse monitor (transducer) was available for experimentation, a simulated test input was devised with frequency variations from JO cycles/minute to 1.50 cycles/minute.

The filtering circuit predicts the time location of each input pulse. The location of the prediction is governed by the accuracy of the preceding prediction. This is controlled by an R-C timing circuit with a Schmitt Trigger and relay.

From the data …

Development Of A Fluor-Mica Dielectric Using Glass-Ceramic Fabrication Methods., James Joseph Tuzzeo

Masters Theses

"A tetrasilicic fluor-mica, K₂Mg₅si₈o₂₀F₄, was synthesized using glass-ceramic fabrication methods. Bubbles, rods, and disks of glass-mica were formed, and heat treated at selected temperatures between 620°c and 1160°c for various time periods. Density changes were correlated to mica content to determine the relative amounts of crystalline mica phase precipitated after heat treatment. Dielectric losses and dielectric constants of the glass-mica disks were measured for correlation to mica content"--Abstract, p/ ii

Properties And Perfection Of Zr-H Solid Solutions At Room Temperature., Dirk Heinrich Wiebe

Masters Theses

"The lattice constants of α. - Zr with 122 ppm H are a₂₅ = 3.23622 ± o. 00005 Å and c₂₅ = 5 .1526 ± 0. 0003 Å. The thermal expansion coefficients of α - Zr are found to be α_a =4.6 x 10^-6(⁰C^-1) and α_C =11,0 x 10^-6(⁰C^-1) in the range between 15 and 55°c.

The solid solubility limit in the Zr - H system at room temperature and independent of the H pressure was determined by the parametric x-ray method to be …

The Effect Of Gap Graded Aggregate On The Properties Of Hot Mix Asphaltic Concrete, Maurice L. Northcutt

Masters Theses

"The objective of this investigation was to determine the effects of deviations from the recommended gradation of aggregate upon asphalt concrete mixes. The aggregate used in this study was a good grade Missouri Limestone and was mixed with an asphalt cement of 85-100 penetration grade. A control mix was designed in accordance with the Marshall Method using a gradation recommended by the Asphalt Institute. Ten aggregate blends were prepared by wasting certain fractions or combinations of fractions and the wasted weights were redistributed into the coarser or finer aggregate sizes. The test mixes were designed using the same method and …