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Isothermal Decomposition Of Austenite (In 1.4% Tungsten Steel) At Subcritical Temperatures, Samir Moustafa Riad

Masters Theses

"An experimental investigation was conducted in order to study the relationship between temperature, time and the decomposition of austenite in Tungsten steel of a given composition - and to plot the T-T-T Diagram for this steel.

The steel was prepared, homogenized and cut into identical specimens for further heat treatment and metallographic inspection. Precautions were taken to prevent these specimens from decarburizing during any heat treatment.

This experimental work may be divided into three main parts:-

I. Determination of the critical temperature range; i.e. the range of temperature Ae₁ and Ae₃ above which austenite is stable and below …

A Theoretical Investigation Of Periodic Precipitation, Jack M. Scrivner

Masters Theses

"The problem of periodic precipitation in solution or gel is considered from the standpoint of supplementing the simple diffusion equation with chemical reaction rate terms. This addition has the effect of making the differential equations of the process non-linear.

The system of equations admits of a periodic, steady-state solution under certain conditions, but lack of experimental values for the parameters prohibits a definite statement as to whether or not the model is valid"--Abstract, page ii.

Investigation Of Vertical Internal Spillways, Paul R. Munger

Masters Theses

"This investigation resulted in the development of a means of predicting the discharge of water through an internal spillway type rockfill dam. From the data obtained during the various tests, equations were developed by which the coefficient of discharge for an internal spillway type rockfill dam can be determined when the core height, rock size and head causing flow are known. The equations give results with an error of less than 5%, which is adequate for engineering works"--Abstract, page 2.

A Study Of The Hood Inlet And Its Possible Use As An Overflow Structure For A Sanitary Lagoon, Richard Irwin Boe

Masters Theses

"A closed conduit, such as an overflow pipe for a conservation pond or a sanitary lagoon, will not flow full if laid on a slope that is hydraulically steep unless the pipe entrance receives special attention. A steep conduit slope is necessary to insure that the pipe entrance controls flow.

The recently introduced hood inlet will permit the closed conduit to flow full, even if on a hydraulically steep slope, upon a slight submergence of the inlet crown. The hood inlet is formed by cutting the pipe at an angle so that the crown of the inlet projects beyond the …

Effects Of Solids On Friction Factor In A Sand-Water Mixture, Frank J. Capek

Masters Theses

"At the present time various industries in both the United States and Europe are very interested in using pipelines as a means of transporting solids. The pumping of solids in pipelines isn't new, however, many of the pipelines in use today were constructed on an empirical basis. This is primarily due to the lack of knowledge concerning the flow properties in fluid-solid mixtures and slurries. With this need for fundamental information in mind, the author made a study on the effect solids have on the friction factor in fluid-solid mixtures.

In this paper various percentages of fine and coarse sand …

Design, Construction And Operation Of Equipment For The Study Of Evaporation Of Aqueous Solutions Using A Simplified Reactor Design Approach, Virendra Kumar Mathur

Masters Theses

"The study of simultaneous heat and mass transfer in flow reactors has attracted the attention of many workers for a long time due to its wide application in the industrial field. These heat and mass transfer studies play an important role in determining the rate equations and in turn the size of the reactor itself. A large number of chemical reactions have been studied by various workers….

The purpose of this work comprised only the initial or exploratory phase of this overall project, and deals with the design, construction and assembling of the equipment necessary to carry out the vaporization …

The Relationship Between Achievement And Laboratory Work In High-School Physics, Herbert W. Richter

Masters Theses

Chapter I

The Problem and Its Background

The Purpose of the Study

The teaching of physics in the high school has been modified over the years to meet the changing needs of students and to include the developments of modern times. Together with these changes there has been in recent years much controversy concerning the purpose and value of laboratory work that accompanies the course. The purpose of this study is to investigate the relationship between achievement in high-school physics and the amount of laboratory work that may be included.

Gladstone, The Irish Home Rule Question, And Its Effect On The Liberal Party, Kenneth John Van Dellen

Masters Theses

Introduction

Purpose

The Victorian Age of English history produced many great political leaders. Among the best known are Chamberlain, Disreali, Palmerston, Salisbury, and Gladstone. These politicians were able to pacify many dissatisfied groups and produce many reforms. Yet one of the biggest problems they had to face was left unsolved throughout the Victorian period, and the later Edwardian period as well. This problem was Ireland.

This research project will deal with the man who made one of the most persistent efforts of the nineteenth century to solve the Irish problem. It will attempt to show how William Ewart Gladstone become …

A Survey To Determine The Attitudes And Opinions Of Young People Toward A Career In Supermarket Management, William O. Haynes

Masters Theses

Introduction

One of the most notable developments on the business scene over the past thirty years has been the development of the distribution marvel - the supermarket industry. This phenomenal industry, born in the depths of the great depression of the thirties, has captivated the American people and is fast spreading around the world. The impact of this truly American institution has influenced other forms of retailing which now pattern their operations technique on this system of mass low-cost retailing.

Beliefs And Attitudes Of Recent High School Graduates On The Subject Of Beverage Alcohol, Francis E. Chape

Masters Theses

Introduction

During recent years, many investigations concerning the teen-ager and beverage alcohol have been carried out. A survey of the available literature on this subject revealed that most of the studies have been made to determine the attitudes toward drinking and the drinking behavior of this age group. These studies, Maddox¹ states, provide "The basis for generalizations about drinking in high school which are more substantial than impressionistic guesses."

Generalizations, however, have not been limited to drinking behavior alone. Alcohol education programs, required by law in every state in the union,² have received much criticism in recent times. …

The Extinction Of An Instrumental Response As A Function Of The Size Of The Reward And The Number Of Acquisition Trials, Venan E. Thompson

Masters Theses

No abstract provided.

A Study Of Teaching Music Reading In The Elementary School, Janelle Ellen Ogle

Masters Theses

No abstract provided.

Project Use In The Teaching Of High School Biology, Norma Grace Hockett Bauer

Masters Theses

No abstract provided.

A Study Of Equipment And Activities For A Proposed Office Practice Course At Cumberland High School, Lucille Baker Buchanan

Masters Theses

No abstract provided.

Physical Property Tests Of Rock, Centrifugal Tests And The Design Of Underground Mine Openings, Samuel Shu Mou Chan

Masters Theses

"Proper design of stable underground mine openings is important to the mining industry today. Various methods have been utilized by investigators to approach this goal.

A review of previous investigations of each of the phases of underground mine opening stress analysis is presented.

An approximate method of designing underground mine structures based on estimation of the initial stress field, rock physical property tests, and model tests, together with preliminary field data, is presented, and a specific example given"--Forward, page i.

Design Of An Intermediate Frequency Amplifier And Variable Frequency Oscillator, Robert Charles Mcintyre

Masters Theses

"Since the advent of the transistor in 1948 many technological barriers have been overcome in the field of semiconductors. Unfortunately, however, there is a considerable period of time between the discovery of a scientific phenomena and its widespread use and understanding by practicing engineers. The motivating factor which prompted this investigation was primarily the lack of knowledge which the author possessed concerning transistors. The selection of the amplifier and oscillator design confined the study primarily to the transistor. Considerable time, however, had to be spent in the study of basic transistor theory before any phase of the design could be …

A Thermodynamic Study Of The System Pbo-Pbs, John P. Hager

Masters Theses

"An experimental investigation was conducted in order to determine the thermodynamic and kinetic behavior of the system PbO-PbS.

The thermodynamic behavior of the system PbO-PbS was studied by measuring the P_SO₂ in argon-SO₂ mixtures equilibrated with various PbO-PbS mixtures in a recirculating-type equilibrium apparatus, and analyzing the condensed phases by means of X-ray diffraction.

The effect of temperature and PbO/PbS ratio on the rate of SO₂ evolution was investigated in order to determine the reaction mechanisms involved in the approach to equilibrium.

A sodium hydroxide, hydrogen peroxide titration technique was employed in the analysis of SO_{2 …}

Construction Of Distillation Solvent Recovery System, Joseph Richard Aid Iii

Masters Theses

"When a nuclear fuel is “burnt” in an atomic reactor it is not possible to completely utilize the fissionable material present due to build-up of fission products (which act as poisons), depletion of the fissionable material, and radiation damage to the fuel elements. Chemical processing of nuclear fuels is concerned with the recovery of the fissionable materials, specifically uranium, plutonium, and thorium, from the spent fuel elements. There are two general methods of reprocessing nuclear fuels: aqueous and non-aqueous. The aqueous methods include solvent extraction, ion exchange, and precipitation. Comprising the non-aqueous methods are fluoride volatility and pyrometallurgy. At the …

The Evaluation Of The Influence Of Large Aggregate On The Permeability Of Single-Grained Soils, Edward Clayton Grubbs

Masters Theses

"Each year many earth fill structures are designed and built with the primary purpose of impounding water. As these structures are only relatively impervious, engineers must consider the control of seepage in design. In order to predict seepage, the engineer must have knowledge of the potential flow or water through the earthen structure. He is, therefore, faced with the problem of determining a coefficient of permeability for use in design calculations.

The coefficient of permeability is easily enough determined for fine-grained materials. However, in construction it is very rare to find proper fill material which does not include quite a …

Preparation Of Casting Slips Containing Ferrous Powders And Alginates, Robert Eugene Newcomer

Masters Theses

"The preparation of casting slips containing ferrous powders dispersed by alginates was studied and an attempt was made to determine the mechanism by which suspension was attained. The colloidal aspects of preparing ceramic casting slips are discussed and an analogy is drawn to preparation of metallic slips suspended by alginates.

Sodium and ammonium alginates were used to suspend stainless steel and iron powders. The effect of NaOH, HC1, and various phosphate additions on the properties of slips and algin solutions was considered.

It was found that colloidal concepts can not be applied to explain observed behavior in the system studied. …

A Study Of The Feasibility Of Stabilizing Putman Soil With Hydrated Lime And Portland Cement In Combination, John Henry Kern

Masters Theses

"This paper is the report of a feasibility study of the combined use of hydrated lime and portland cement to stabilize the troublesome Putnam soil of northern Missouri. In its natural state, this soil is highly plastic, possesses great shrinkage and swell characteristics when the moisture content is changed and is classified as an A-7-5 soil by the A. A. S. H. O. Standards for the Classification of Highway Subgrade Materials.

During the course of this investigation, the following tests were performed: (1) Moisture-Density Relationships for soil with admixtures; (2) Triaxial Compression Test; (3) Unconfined Compression Tests; (4) Freeze-Thaw Tests; …

The Equalization And Optimization Of A Third-Order Type-1 Position Control System, Viswanatha Seshadri

Masters Theses

"While the practice of feedback control dates back to the day when the earliest living organisms began to react to their environmental conditions and the changes therein, it has been only during the past two decades that this technique came to be subjected to a scientific examination. Yet, an astoundingly rapid advancement has resulted in the field of servo-mechanisms, contributing substantially to the development of modern civilized existence and activity to its present standards, and promising to contribute, to an ever-increasing extent, to the accelerated progress of scientific and industrial enterprise in this space age.

The principal concerns of the …

The Lattice Constants Of Chromium And Vanadium Containing Dissolved Gases, Paluri Bhimeswara Rao

Masters Theses

"The physical properties of chromium and vanadium are so important that a study of their lattice constants and their coefficients of thermal expansion, requires special consideration.

A number of research workers, over a period of about forty years, have done considerable work in determining the above constants. Some of the previous investigators found an anomaly in the thermal expansion, electrical resistivity and other physical properties of chromium. They observed that at about 37°C, chromium showed a discontinuity in the above physical properties. However it is not known what causes the discontinuity in the expansivity curve of chromium. The discontinuity may …

A Method For The Prediction Of Detection Ranges For Pulsed Doppler Radar, Phillip Orlan Brown

Masters Theses

"Modern radar systems must provide greater detection ranges both against high and low altitude targets because of the significant advances in weapon speed and range. Extended range indicates that the power transmitted by the radar must be increased. It follows, that ground return becomes a problem even at high altitudes.

There are at present three basic types of radars which are (1) pulsed, (2) continuous wave, and (3) pulsed doppler radar. The conventional pulsed radar now closely approaches the theoretical optimum performance; however, it does not have the inherent ability to distinguish between ground return and moving targets. The continuous …

A Dissolution Rate Study In Hydrofluoric Acid Of Titanium And The Alpha Solid Solutions Of Oxygen In Titanium, John L. Ratliff

Masters Theses

"The dissolution mechanism of titanium in hydrofluoric acid was studied by collecting the hydrogen evolved during the dissolution reaction. A concentration range of 0.05 N to 0.50 N and a temperature range of 15°C to 45°C were employed for the determination. Values of the reaction order and energy of activation were determined for both pure titanium and the alpha solid solutions of oxygen in titanium and found to be the same within experimental limits. This indicated that the reaction giving rise to hydrogen evolution on the surfaces of both pure titanium and the TiO_x alloys was the same. The …

Methods For Calculating The Minimum Amortization Tonnage And Maximum Present Value For An Ore Body, Garrett M. Sainsbury

Masters Theses

"The discussion is divided into three parts. Part I describes a procedure for determining the mining rate that gives the minimum amortization tonnage required of an ore body, and the amount of that tonnage. The basic idea is that amortization tonnage is equivalent to the estimated capital costs, including interest, divided by the estimated operating profit per ton. Both capital costs and operating profit per ton can be expressed as functions of mining rate by making use of empirical equations. Therefore, amortization tonnage can be expressed as a function of mining rate. The amortization tonnage is calculated for a series …

Heat Transfer In A Vortex Flow Metal To Air, Elisha Rachovitsky

Masters Theses

"In this study heat transfer in a vortex flow has been investigated experimentally and analyzed qualitatively.

Air was forced through a Ranque tube in order to get a swirling turbulent flow in its "hot" section. The test section, having a diameter of .355 inches and a length of 27.5 inches, was heated by an induction coil.

Three types of flow were under investigation: a linear turbulent flow, a vortex uniflow and a mixed vortex-linear turbulent flow.

The experiments covered a range of tube-wall temperature from 570 to 900 Deg. R and inlet pressure to the vortex generator ranged from 25 …

Determination Of Vapor-Liquid Equilibrium Data By Continuous Distillation, David William Bunch

Masters Theses

"The procuring of experimental vapor-liquid equilibrium data has been a problem of considerable importance to chemical engineers for a number of years. Modern distillation theory and practice have made accurate vapor-liquid equilibrium data practically a necessity.

Using conventional methods for determining vapor-liquid equilibrium data, an experimenter can obtain only a single vapor-liquid equilibrium composition per trial. Ramalho working with Tiller has developed a new method which makes possible the determination of all values of the vapor and liquid concentrations in a single experiment.

The work done by Ramalho indicated that the necessity for very precise temperature measurements presented a serious …

The Dielectric Strength Of Some Anti-Corrosive Paints, John Harvey Gustafson

Masters Theses

"Metals undergo chemical reaction with nonmetallic elements of their surroundings to produce compounds which are either oxides or salts. These corrosion products, as they are called, may accelerate, impede, or have no influence on the course of further corrosion. It is unfortunate that iron, the metal of greatest use to man, receives very little protection from its corrosion products. There are no easy or inexpensive means of prevention of this corrosion and at best the reactions can only be controlled. One method of control is the use of anti-corrosive paints. Their protection is produced by placing an inert, continuous, and …

A Study Of The Inlet Characteristics And Entrance Losses Of Pipe Culvert With A Flush Mounted, Sharp Edged Inlet, Luke Lea Callaway Jr.

Masters Theses

"Of all hydraulic structures, culverts are by far the most numerous. Lack of understanding of the functioning of culverts has resulted in many of them being implaced improperly and as a result, they function with less efficiency and at reduced capacity. Much has been written regarding the flow of water in open channels, culverts included, but little has been done regarding inlet conditions. It is necessary in the design of culverts, as with any other structure, that conditions which govern the operation of the structure be established. This paper is a study of the inlet conditions of a circular cross …