Digital Commons Network^™

The Partition Function Of Silver, Ralph H. Lilienkamp

Masters Theses

"The study of the thermodynamic properties of solids at low temperatures has shown that most theories either break down or become too cumbersome.

A theory based upon a crystal lattice of atoms gives the best physical picture of a solid. Fisher has developed partition functions from this theory for the simple cubic, body-centered cubic, and the face-centered cubic lattices. In his paper Fisher gave three partition functions of increasing complexity and accuracy for each of the three lattices. In this paper the three partition functions for a face-centered cubic lattice shall be applied to silver and compared.

The Helmholtz free …

The Effect Of Grain Size On Shearing Strength Of Sand, Keyhan Samimi

Masters Theses

"The object of this study is to determine experimentally the effect of definite grain size on the shearing characteristics of sandy soils. As it will be discussed in detail under the article - The Mechanics of Shear, the shearing characteristics of sandy soils depends on many factors such as grain size and shape, soil structure and relative density, the water content of soil. An attempt is made throughout the entire investigation to determine the effect of definite grain size on the shearing value and the angle of internal friction under the dry and saturated conditions. Furthermore, the results of shear …

4-Benzoyl-4-Methyl-1, 2-Epoxypentane, An Attempted Synthesis, Robert L. Snell

Masters Theses

"The object of this research was to prepare first the simplest homologue of the epoxy-ketone considered by Russell to have been his product. If this homologue, 4-benzoyl-4-methyl-1,2-epoxypentane, could be prepared and caused to form a cyclic derivative of the type given by 1,4-diketones with 2,4-dinitrophenylhydrazone, the organic chemist would be given a new approach to substituted 1,2-diazines as well as a previously unreported reaction of the epoxide grouping. If this reaction could be made to occur, other epoxides of this series would be prepared and treated in the same manner.

It was decided that the shortest route to 4-benzoyl-4-methyl-1,2-epoxypentane would …

A Comparison Of The Real Price And Market Price Of Some Common Metals, Kon-Hock Khaw

Masters Theses

"A number of complex factors influence the fluctuation of the price of a metal. In this investigation, the writer is concerned with the influence of the purchasing power of the dollar and, therefore the difference between the value (real price) and market price of nine metals. That is, this is a study of metal prices and their corresponding values. No attempt is made to analyze the supply and demand of the past or the future, except as they are expressed by their function -- price.

To aid in the comparison, a set of index numbers for metals is compiled and …

A Survey Of The Forms Used In The Organization And Administration Of Off-Campus Student Teaching In Business Education In The Public High Schools Of The United States, Fredrick Donald Luallen

Masters Theses

No abstract provided.

An Investigation As To The Uses Of The Topographic Map And Improvements Desired By The General Public, George O. Boeckman

Masters Theses

"The demand for topographic maps from hunters, fishermen, vacationers, professional engineers etc, has been increasing with each passing year. In 1940 people bought some 700,000 copies of topographic maps. In 1946 sales had jumped to well over 2,000,000 copies. Civilian use of these maps by veterans has contributed substantially to the tremendous expansion of demand for maps since World War II. In recent years, the quality of topographic maps has been greatly improved by refinements in methods and by the use of aerial photography in map compilation. This advancement, and an ever-increasing demand from engineers, geologists, and many others for …

An Economic Study Of The "C" Factor, David Hunter Robinson

Masters Theses

"After due consideration of the facts and hypothetical conditions enumerated herein, it was decided that this work would be devoted to developing a means of determining the most economical “C” factor to be used; one that will be consistent with ease of operating the plotting machine, the required accuracy of the finished compilation and economy. In other words, the highest value of the "C" factor that will produce results within the accuracy requirements under normal operating procedures.

As a secondary project, it was decided to plot a curve using points determined by analyzing a series of spot readings made at …

Autographic Determination Of Thermally-Induced Linear Changes In Ceramic Bodies, William Dean Mckee Jr.

Masters Theses

"The determination of changes in length of ceramic compositions as a function of temperature is frequently required in ceramic research and testing. With the use of an observer, excellent means are available for determination of changes in length over moderate ranges of temperature. However, the extended period required for some tests makes desirable the automatic recording of length change as a function of temperature.

There has been in use in the Ceramic Engineering Department a furnace arranged for determination of length changes; this furnace, shown in Figure 1, is so arranged that change in sample length causes linear displacement of …

Hydrology Of Small Drainage Areas, James Kinchen Searcy

Masters Theses

"Realizing the need for data on small drainage areas the Missouri Highway Commission in 1947 began a cooperative project with the Water Resources Division of the United States Geological Survey which includes the establishment of small area gaging stations and recording rain gages.

The purpose of this investigation is to study some of the data collected in the few years of operation of these small area stations with the aim of testing some of the hydrologic tools useful in the study of larger drainage basins to determine their applicability on small drainage basins. The relationship between the runoff of large …

An Investigation Of End-Anchorage And Performance Of Sr-4 Strain Gages On A Prestressed Concrete Beam, Howard W. Nunez Jr.

Masters Theses

"In recent years there has been brought to the attention of engineers and architects a new medium of construction---prestressed concrete. Reinforced concrete has long been recognized as a satisfactory material for use in the construction of buildings, bridges, highways, tanks and other structures. However, most concrete designers will concede that this material has many drawbacks. For instance, in a simple beam of rectangular cross-section, roughly only one half or the concrete is relied on to resist compressive forces. The tensile strength of the concrete is considered to be zero, and steel bars or rods must be inserted to carry the …

Design Of A Galvanometer To Be Placed Within A Tubular Antenna For The Purpose Of Measuring Antenna Current Distribution, Ferdinand Henry Mullersman

Masters Theses

"The object of this paper is to design such a galvanometer for application to cylindrical UHF antennas and to discuss the procedure involving its use. The galvanometer will then be placed inside a completely isolated parasitic antenna and the distribution of current along the antenna will be measured"--Introduction, page 5.

Dissociation And Relative Stability Of Sodium Fluotitanate, Walter L. Gage

Masters Theses

"Titanium is urgently needed in the armament industry especially as a substitute for 18-8 stainless steel. There would be an almost inexhaustible supply of ores of titanium if high-purity titanium metal could be produced economically in large quantities. The use of titanium would permit much of the scarce nickel and chromium to be made available for other important uses.

It has been found by H. C. Kawecki and E. J. Bielecki that high-purity Na₂TiF₆, K₂TiF₆, and (NH4)₂TiF₆ can be produced from iron-bearing titaniferous raw material, ilmenite ores, or a …

Activation Energy For Recrystallization In Rolled Silver, Krishan Kumar Tangri

Masters Theses

"In several metals the process of recrystallization is accompanied by a change in the orientation of the recrystallized material with respect to the cold rolled material. If the change is sufficiently large, the changing position of the crystals can be determined by measuring the change in the intensity of the characteristic Bragg-reflection with a Geiger counter x-ray spectrometer. Recent determinations of the activation energies of copper and a 50/50 iron-nickel alloy have been made by using this x-ray technique. Both of these metals show a decided shift in the orientation as the material is recrystallized.

Silver was examined to find …

The Application And Utilization Of Mining Models For Instruction And Display, William M. Shepard

Masters Theses

"The subject of the utilization of mine models for instruction and display at institutions offering courses in mining engineering has not been widely discussed in the literature. The value of models as visual aids in teaching has long been recognized, and they have been extensively employed by some institutions and by some instructors. However, the writer believes that a wider range of types of models are suitable for instruction purposes than have been employed in the past, and that mining models, properly arranged and adequately labelled, may be used in displays to give both the layman and the beginning student …

A Study Of Size Of Diamonds In Diamond Drilling, Robert J. M. Miller

Masters Theses

" ''A Study of Size of Diamonds in Diamond Drilling' is the research problem which will be discussed in this treatise.

The author's interest in the effect of size of diamonds was created by Mr. R. D. Longyear of the E. J. Longyear Company of Minneapolis, Minnesota. Mr. Longyear, when asked for suggestions for a research problem concerning diamond drilling suggested, among other things, that there was a need for further work on the factor of size of stones. After extensive reading and reviewing, the author learned that many investigators had recognized changes in results attributable to changes in size …

The Design Of A Closed-Loop Voltage Regulator For A D-C Generator, Ernest P. Longerich

Masters Theses

"The methods of obtaining voltage regulation for a d-c generator are many, and they vary in complexity according to the requirements of the loads being supplied.

A need for zero voltage regulation is not uncommon in power supplies that are used in laboratory work. It is frequently not enough, however, to have a supply whose steady state regulation is zero; the need may also exist for fast transient response to changes in load.

In general, then, the criteria for excellent voltage-versus-load characteristics of a d-c power supply might be stated as follows:

1. It has zero steady state error.
2. It has …

Photoelastic Investigation Of Notched Corners In Square Apertures In Flat Plates Subjected To Tension, Lloyd E. Byrd Jr.

Masters Theses

"Photoelastic stress analysis is one of the most effective methods available to the engineer for solving problems of stress distribution. The effect of forces, such as pressure and tension may be studied using a scale model of a structural part. Special transparent models are subjected to forces proportional to those acting on the real object. The stress problem produced in the model indicates the stress distribution through a cross-section of the structural part.

Analysis of the photographic record of the stress analysis pattern provides data with a high degree of accuracy within a relatively short time. In simple cases, this …

Temperature Kinetics Of Nitrogen Dioxide-Ammonia Reactions, George Dillender Jr.

Masters Theses

"The purpose of this project was to study the rapid rate of reaction of nitrogen dioxide and ammonia and if possible to determine the mechanism of the reaction.

The author became interested in this project through his interest in rockets, jets, and the types of fuel that are used to propel them.

The prospect of using nitrogen dioxide and ammonia as a possible fuel was the basic reason for the selection of this project.

Very little has been done in the study of the reaction of nitrogen dioxide and ammonia, although the reaction seems to be a simple one.

How …

Rehabilitation Of Land Stripped For Coal, Richard Matthaei

Masters Theses

"The usual connotation of the word rehabilitation as applied to land areas is the restoration of that land to its former efficiency. However, in the spirit of conservation that is essential to our standard of living, the word has begun to have added meaning. In the fullest concept, rehabilitation involves a study of soil characteristics and capabilities, and creation of productive uses of which the land was not capable in its original condition. The true conservationist has an opportunity to make a useful contribution to the future generations of this country. The United States Forestry Service and the United States …

Direct Reduction Of Zinc Sulfide Under Vacuum, Merritt E. Langston

Masters Theses

"The present work is a continuation of the previous investigations of Gross and Warrington and Liu in which the effect of various reducing agents on the vacuum reduction of zinc sulfide was studied. The author became interested in this topic while reading the papers by these investigators in which they recommended that further work be performed in an attempt to prevent zinc sulfide from distilling over during reduction, thereby contaminating the zinc condensate. The original plan was to perform a few runs for the purpose of duplicating the results that were reported by Liu, and from this point carry on …

An Efficiency Analysis Of Underground Haulage In The Tri-State Mining District, Leroy King Wheelock

Masters Theses

"Purpose of Investigation: This study was undertaken to describe and analyze the system of haulage as practiced in mines of the Tri-State District by the Eagle Picher Mining and Smelting Company.

The investigation is concerned with all of the operations involved in moving the broken rock and is composed of three distinct procedures: loading, hauling, and hoisting.

One of the important items in the cost of mining is the movement of ore and waste to the surface for further disposition. Increased efficiency of transportation should introduce lowered production costs.

In this paper the efficiency of the present equipment and the …

An Investigation Of Attitudes Toward, And Proficiencies In, Junior-High-School Arithmetic, Robert Lee Andrews

Masters Theses

Chapter I

The Problem and Its Background

Definition of the Problem

The problem of this study is (1) to determine the extent of the relationship between likes and proficiencies in certain areas of arithmetic in the seventh and eighth grades in the Milwood Junior High School, Kalamazoo, Michigan, and (2) to determine the extent of the relationship between dislikes and deficiencies.

State And Local History In Michigan Schools, Robert R. Swartz

Masters Theses

Chapter I

The Problem and Its Background

State and Local History Defined

State and local history may be considered relatively as geographical terms. In Europe, German history is state history. In the United Sates, Michigan history is local history. In Michigan, St. Joseph County history is local history. In St. Joseph County, the history of a village, township, or school district is local history. For the purposes of this study state history will refer to the history of Michigan. Also, in this study, local history will refer to the history of a county, township, village, or school district in this …

A Comparison Of The Relative Effectiveness Of Teaching Seventh Grade Arithmetic With A Textbook And Without A Textbook, Alfred John Reynolds

Masters Theses

Chapter I

The Problem and Its Background

The Place of Arithmetic in Modern Education

The subject of arithmetic is as old as human history itself and yet it holds a very important place in modern education. In order to have a clear understanding of its present position it is desirable that a brief history of arithmetic be given. Since the history of arithmetic is long and since much has been written concerning it, an attempt will be made here to cover only the main thread in its development.

The Babylonians, according to records, made the first use of arithmetic. Karpinski …

A Recommended Program Of Related Instruction For Electrical Apprentices, Andrew C. Luff

Masters Theses

Chapter I

Introduction

The Role of Apprenticeship

The institution of apprenticeship has been an important educational process since the beginning of history. Centuries ago trade skills were passed on from father to son, and from master to novice through an association whereby the craftsman taught the novice the skills of his trade. Down through history apprenticeship has flourished either in one form or another, and today it is an important part of the industrial system. Apprenticeship has developed in accord with industrial progress.

In order to avoid confusion, it may be well at the outset to designate the meaning of …

The Use Of Oil-Base Drilling Fluids, William Wesley Collins

Masters Theses

"Within the past few years the development of oil-base drilling fluids has become one of the more important contributions to drilling and production technology. The use or these new muds has increased as the benefits obtained have become more widely known and appreciated. Major problems in the petroleum industry have been, for many years, the contamination or drilling muds by salt water; control of mud when drilling through anhydrite, gypsum, or salt deposits; control of heaving or swelling shale; and water or mud blocking or the producing horizons. The development or oil-base drilling fluids is a direct contribution or engineers …

Oil Field Corrosion, Edwin Harry Barsachs

Masters Theses

"The corrosion of metals in the petroleum industry has become an important engineering problem. The rapid increase during recent years in costs of steel has caused the industry to intensify its efforts to minimize corrosion losses in pipe lines and well casings. An industry-wide research program has resulted in the development of improved methods of controlling corrosion of such equipment.

The purpose of this paper is to assemble and correlate the information concerning the different causes, the detection, and the mitigation of corrosion of metals used in the oil fields of the world. The causes that are presented in this …

Photoelastic Investigation Of Filleted Corners In Square Apertures In Flat Plates Subjected To Tension, Raymond Huston Bever

Masters Theses

"During recent years many advances have been made in solving engineering problems by mathematical means. While this method of solving problems is invaluable to the engineer, there are times when a rigorous mathematical solution cannot be readily obtained, and the engineer must resort to other methods, some of which are approximate.

This paper attempts to show the application of photoelastic investigation to such a problem. The results of this problem are quantitative, but they show without any doubt that this method of investigation has considerably influenced the modern design of machine parts and helped in many cases to improve construction …

Torsional Modulus Of Rupture Of Thick-Walled Magnesium Alloy Fs-1 Tubing, Delbert R. Cox

Masters Theses

"Magnesium is taking a more prominent position in the structure of aircraft, and because of this, it is important that the mechanical properties of the material be understood more fully. In the high speeds of today, the tendency is toward the use of thick-walled tubing instead of the thin-walled tubing with stiffening structures. For this reason, it is of interest to note the characteristics of thick-walled tubing when subjected to torsion.

This thesis was first suggested by a circular letter on proposed thesis titles from the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio. When interest was …

Airflow Through Metallic Screening, Norman Bernard Wolk

Masters Theses

"The selection of the problem for which this paper offers a solution was made from a list of thesis subjects submitted to Dr. Aaron J. Miles by the United States Air Forces. This suggestion called for the development of a method whereby air flow through woven materials such as metallic screening and woven cloth could be predicted in terms of the pressure drop across the material. The range of the pressure differentials to be investigated was from zero to twenty inches of water.

After some preliminary work it became obvious that an investigation of the air flow through all types …