Digital Commons Network^™

Analysis Of Mining Mechanization In The Fluorspar Mine, Southern Illinois, Marangin Simatupang

Masters Theses

"The purpose of this study is to analyze the underground mechanization in the fluorspar mines in Southern Illinois. The mining mechanization in this district is confronted with manifold problems which are typical of most small or medium size mines.

The ore reserve in each mine is not very large. The method of development had to be planned accordingly such as not to exceed the depreciative capacity of the deposit.

The ore bodies consist of thin bedded layers or small veins. This thickness controls the sizes of the equipment to be used.

The mining operations always lack skilled equipment operators. In …

Operational Characteristics Of A Small Sewage Oxidation Lagoon, Karlheinz C. Muhlbauer

Masters Theses

"With the rapidly increasing population in the United States the adequate disposal of sewage has become one of the major technical problems which the sanitary engineer has to solve. In most areas it is no longer acceptable practice to discharge domestic sewage or industrial waste products directly into streams or lakes because of the resulting pollution of the water, which may later be used for drinking or recreational purposes. Many larger cities have, therefore, adopted some method of sewage treatment which renders such wastes safe and unobjectionable before they are discharged into a lake or stream. Most of these methods …

A Study Of Cholesterol And Lecithin Blood Levels In Rh Sensitized Women Treated With Rh Hapten, Franklyn Lewis

Masters Theses

The Problem And Its Background

Introduction

Perhaps one of the most popular subjects, and a subject which has been discussed a great deal by the layman is that of Rh and Rh incompatibilities.

Landsteiner¹ discovered the Rh property of human blood by means of immune sera prepared with the blood of rhesus monkeys. He was assisted in this work by Wiener², who states that the Rh property was found to be present in about 85% of white individuals, and independent of the blood groups and M-N type. It is these individuals who are referred to as Rh …

An Ecological Survey Of Maple Products As A Natural Resource Of Athens Township, Calhoun County, State Of Michigan, Ralph P. Gies

Masters Theses

I. The Problem

Statement of the problem. It was the purpose of this investigation to undertake a field study in Athens Township, Calhoun County, State of Michigan in order to (1) determine the ecological factors necessary for maple sap production; (2) relate the extent to which the natural resource is being used; and (3) determine economic and social values to the syrup producers. The information was compiled through the sue of interviews, questionnaires, research, and participation in a community project.

Temperature Stabilized Transistor Direct Current Amplifier, William Lewis Metcalf Jr.

Masters Theses

"A stable direct current transistor amplifier is difficult to design for use at elevated temperatures. The above is true since transistor parameters and bias conditions are affected by temperature. When transistors are incorporated in direct coupled amplifier circuits, these variations in parameters and bias conditions usually result in unstable operation. It is the purpose of this thesis to investigate this problem and to design a stable direct current transistor amplifier which will operate satisfactorily at elevated temperatures.

This problem is of importance as such direct current amplifier circuits are found in airborne or missile servo systems. In such systems the …

The Development Of Basic Word Lists And Their Use In Teaching Spelling, Nelle Gullett

Masters Theses

No abstract provided.

The Contribution Of The Parent-Teacher Conference To Home-School Relations, Iola Allain Ferris

Masters Theses

No abstract provided.

An Evaluation Of The Selection, Recruitment And Sustaining Interest Of Beginning Band Students Of The Northeast Quadrant, Decatur Public Schools, Decatur, Illinois, Merton L. Johnson

Masters Theses

No abstract provided.

The Development Of, And Requirements In, Undergraduate Professional Industrial-Arts Courses, Daniel L. Householder

Masters Theses

No abstract provided by author.

A Study Of Experimental Approaches In The Teaching Of Painting, Hannah Newgent Eads

Masters Theses

No abstract provided.

Modern Concepts Of School Discipline, Lawrence E. Camfield

Masters Theses

No abstract provided.

Characteristics Of A Sound Program Of School Public Relations, Dennis Cougill

Masters Theses

No abstract provided.

Opportunities For Guidance In The Language Arts Program, Altys M. Daniels

Masters Theses

No abstract provided.

Physical Properties Of Concrete At Early Ages, Karl H. Dunn

Masters Theses

"There are well over 100,000 miles of concrete pavements existing today on our United States highway system. The development of these pavements during the first half of this century has been a process of learning from construction applications and mistakes. However, the unexpected increase in traffic load has brought highway designers to experiment with relatively new types and designs of concrete pavement construction.

Some designers, in an effort to reduce temperature warping stresses, have used short slabs 10 to 15 feet in length, generally unreinforced. Another type of construction is the definitely jointed slabs, the slabs being from 20 to …

A Geological Study Of The Irvine Ranch Area, Johnson And Campbell Counties, Wyoming, Gale E. Butterfield

Masters Theses

"The discovery of uranium in the Powder River Basin, Wyoming, by the U. S. Geological Survey in 1952 has lead to an extensive exploration program throughout the region by both private and governmental agencies. This report is a geological study of an area in the southwestern part of the basin.

Geological and radiometric mapping carried out as a part of this report indicated several areas of uranium occurrence. Some of these occurrences warrant tests by drilling.

Mineralogical and petrographic study has shown the principal uranium minerals to be carnotite and metatyuyamunite. The mineralization occurs in arkosic sandstones. Assays of the …

Investigation Of Length Changes And Warping In Thin Prestressed Pavements, Wilbur D. Stites

Masters Theses

"The present growth of the American highway system presents a staggering problem to the highway designer. The increased and urgent demand for more highways, capable of accommodating traffic loads that are constantly increasing, combined with the increased construction cost of highways, behooves the present day highway designer to envision future highway problems that will arise. These future problems are numerous and complex; however, it seems the primary problem is the selection of a surfacing material that will withstand projected traffic loads with a maximum economy of construction and future maintenance costs. Concrete at the present time is the most satisfactory …

Servomechanism Compensation With An Active Phase-Lead Network, Robert T. Dewoody

Masters Theses

"The problem is to develop a phase-lead compensation network for a servomechanism which will not reduce the low-frequency gain and thus decrease the velocity-lag error. The principal part of this thesis deals with the design of such an active phase-lead network. The active network does not have d-c coupling; this eliminates drift problems.

To illustrate an active phase-lead network a simple second order servomechanism is used as a basis for comparing three methods of compensation.

The first method is compensation with a conventional phase-lead network with a gain decrease. The second method is compensation with a conventional phase-lead network with …

Physical Properties Of Concrete At Early Ages, Curtis E. Weddle Jr.

Masters Theses

"The introduction of the motor vehicle and the subsequent rapid expansion of the highway systems of the United States have brought with them many problems.

The Civil Engineer, in his attempts to provide adequate safe avenues of travel for the populace, has been faced with many problems. Handicapped by the need for speed in design and lack of information of the trends in motor vehicle design, the engineer has been forced at times to utilize design methods inconsistent with good engineering practices.

Of the many types of pavement sections which have been designed in an effort to provide structurally and …

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, …

An Investigation Of Certain Factors Influencing The Testing Of Auditory Phonetic Discrimination, Warren Scott Curtis

Masters Theses

The Background of the Problem

Review of the Literature

The importance of auditory phonetic discrimination in speech therapy. One of the basic criteria for good articulation is that the individual sounds or phonetic units which make up a word must be produced correctly and arranged properly in sequence. According to Van Riper (32:127), when a speaker adds, omits or distorts a particular phoneme to the extent that it alters word meaning, calls attention to itself, and/or produces unpleasant emotional reactions in the speaker or audience, he is adjusted to have an articulation defect.

An Evaluative Study Of The East-Alton Wood River Business Education Curriculum, Richard Leroy Olmstead

Masters Theses

No abstract provided.

The Effect Of Handedness As Related To The Communication Arts, Bertha Beck

Masters Theses

No abstract provided.

A Study Of The Correlation Between Articulation Development Scores And Reading Test Scores, Viola K. Hallock

Masters Theses

No abstract provided.

Controversial Issues In The Junior High School, John A. Dively

Masters Theses

No abstract provided.

Application Of The Principles Of Mental Hygiene To The Social Development Of Primary Children, Olive Holsapple

Masters Theses

No abstract provided.

Visual Perception In Reading Readiness, Reva Cougill

Masters Theses

No abstract provided.

A Review Of The Transactional Approach To Perception With Implications For Audio-Visual Instruction, Floyd A. Landsaw

Masters Theses

No abstract provided.

The Stability Of Rectangular Plates With Built-In Supports At The Edges, John Bruce Miles

Masters Theses

"The purpose of this investigation is to derive an expression for the critical stress for a thin rectangular plate with compressive edge loading. The load is applied on two opposite edges with the remaining two edges built-in. (See Fig. 1) This is essentially a stability problem.

Rectangular plates with compressive edge loading and various edge restraints appear in a number of engineering structures. Bulkheads of ships could be so classified, as could certain components of fabricated beams and columns. The new supersonic B-58 bomber developed by Convair has a honeycomb wing structure dictated by heat conduction requirements. This, too, involves …

Investigation Of Plastic Deformation In Prestressed Concrete Slabs From Long Time Loading, Joe B. Roberts

Masters Theses

"It is the purpose of this research to investigate the creep in a thin concrete slab under a long-time prestress load with the compressive load being applied to the edge of the slab through a bearing plate of small dimensions.

Seven plain concrete slabs, 3' x 4' x 4", approximately one year old, made of normal cement and approved aggregate were subjected to the following loading conditions: (1) Three slabs loaded at the center of the greater dimension with a prestress load or 20,000 pounds applied over an area of eight square inches, (2) Three slabs loaded symmetrically at six …

Creep Characteristics Of Thin Prestressed Concrete Slabs, Wayne F. Alch

Masters Theses

"Prestressed concrete as a structural material is finding wider usage in the United States today. Until recently, economic factors have precluded the use of prestressed concrete in this country, while Europe became the leader in discovering new uses and applications in construction for the material. As new methods are developed in this country, more engineers and contractors are discovering that prestressed concrete is, in many ways, far superior to plain or reinforced concrete. In line with this awakening the Missouri Highway Department is carrying on research to determine the feasibility of prestressed concrete for highway slabs. This study is a …