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Light Gage Cold-Formed Steel Design Manual, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

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The Effect Of Today's Residential Electric Consumer On The Planning, Design, And Operation Of Electrical Distribution Systems, James Wilbur Stephens

Professional Degree Theses

"The purpose of this paper shall be primarily to show the present day trends in the use of electricity by the residential consumer and the effect of such trends on the design, planning, and operation of the electric distribution system. System planning related to the electric utility is divided into two classes. The first deals with generation. The second deals with distribution from the various load and transmission centers to the customer. This thesis will deal .primarily with studies related to the latter.

Many utility distribution system problems have been brought about by the rapidly increased demands for residential uses …

A Study Of Gas Porosity In Aluminum Casting Alloys Using Radioactive Hydrogen As A Tracer, Osborne Milton

Professional Degree Theses

"A method will be described wherein the absorption of hydrogen by aluminum is evaluated using hydrogen 3 as a tracer element. Results show that hydrogen gas is readily absorbed into the melt when it is injected directly, but is not taken on from the combustion products, that quantities of it are released when the metal freezes, and that the commonly used methods of fluxing with chlorine and nitrogen gas are of value for degassing"--Preface, page iii.

Subsurface Geology Of The Mississippi Embayment Of Southeast Missouri, John Gustave Grohskopf

Professional Degree Theses

"To the southeast of the Ozark Escarpment all municipal, industrial, and agricultural water supplies of record are obtained by drilled wells from alluvial sands and gravels, unconsolidated sands of the Wilcox and McNairy (Ripley) formations, and at a few towns from consolidated Paleozoic dolomites limestones, and sandstones. The irrigation wells obtain their water supply from the Allluvium. These wells have recorded yields of several thousand g.p.m, and the water, though excessively high in iron, is still satisfactory for the irrigation of crops. Some municipal and industrial supplies are obtained from the Wilcox sands, but the water usually requires iron-removal treatment. …

Calcination Of Missouri Flint, Burley And Diaspore Clays In A Rotary Kiln, Richard Addison Parker

Professional Degree Theses

"This thesis will concern itself primarily with the preparation, handling and calcination of Missouri fire clays that are subsequently used as "grog" for manufacture of fire brick. This "grog", i.e., calcined flint, burley or diaspore clay is then mixed with ether clays having plastic qualities to form desired shapes of high temperature refractories, and burned as a final product in tunnel kilns and as required, in “beehive” or periodic kilns. The actual manufacture of fire brick will not be dealt with since it is, in itself, a highly specialized industry. We are immediately concerned with the proper preparation of calcined …

Sanitary Engineering And The Small College, John William Clark Jr.

Professional Degree Theses

"There is an unprecedented need for sanitary engineers. College students should be informed of the need and of this general field at an early stage in their education so that proper guidance can be given in the selection of electives to those interested.

Colleges must re-appraise their sanitary engineering offering and expand their programs to meet the needs of society.

One of the most difficult jobs facing an expanded sanitary engineering program is securing the students with proper background. Most of the freshmen entering college have some ideas as to what vocation they want to strive toward. This idea of …

Design And Development Of Cantilevered Flexural Pivots For Use In Self-Leveling Surveying Instruments, Rolland Lee Hardy

Professional Degree Theses

"Problem: The problem to be covered in this dissertation is broadly stated in its title, namely, the design and development of cantilevered flexural pivots for use in self-leveling surveying instruments. For clarification, the definitions of the significant phrases in the title which may be completely new or unknown to the reader are covered in this introduction. Because the dissertation actually covers a series of problems, each will be defined more specifically as they are covered in the discussion"--Introduction, page 1.

Correlation Of Weir Crest Depth, Froude Number, H/P Ratio, Weir Thickness, Paul Harrawood

Masters Theses

"1. The Froude number criterion for weir flow was shown to be sound and accurate by experimental verification of the theoretical correlation of Froude number and critical depth. It was proved that sub-critical, critical and super-critical flows are correctly identified by the Froude number.

2. In order to accurately determine the Froude number, the actual flow section at the weir crest must be known. Because of end contractions, it does not have the same dimensions as the weir opening. For the Cipoletti weir, it is the product of the length of the crest and the crest depth, i.e., A= by. …

Determination Of The Effect Of Air-Entraining Agents On Certain Physical Properties Of Concrete At Early Ages, James Arthur Spilman

Masters Theses

"Air entrained concrete over the past eighteen years has received national recognition as a result of its satisfactory performance in highway concrete pavements and other concrete structures subjected to outside exposure.

Numerous highway departments over the entire United States have laid test slabs made of air entrained concrete. Among those to date are Pennsylvania, New Jersey, New York, Connecticut, Massachusetts, Vermont, Maine, Illinois, Missouri and California. The primary purpose in building these test slabs was to investigate their durability or resistance to freezing and thawing and the action of various salts on air entrained concrete. The results of the test …

A Study Of The Deleading Of Zinc Sulfide Concentrates, Larry Leroy Gidley

Masters Theses

"The object of this research was to study the basic principles and optimum conditions for the deleading of commercial zinc sulfide concentrates by sublimation of the lead in the form of a sulfide. Present commercial practice conducts this sublimation in hearth roasters. This research considered only the variables affecting sublimation of the lead sulfide, not the types of applicable equipment, or other possible processes. However, the laboratory conditions were at least partially similar to those that could be obtained in commercial practice"--Object, page 1.

Light Gage Steel Connections With High-Strength, High-Torqued Bolts, George Winter

CCFSS Library (1939 - present)

The usual methods for designing bolted connections of conventional steel structures must be modified for application to thin-walled, light-gage steel construction. This is so because the ratios of bolt diameter to steel thickness in light-gage construction are generally much larger than those customary in conventional construction. In a previous paper [1] the writer has published the results of 547 tests of light-gage steel connections with ordinary "black" bolts. The results could be expressed in four simple equations for determining failure loads which, when used with an appropriate factor of safety, can serve as a safe basis for design. It is …

Physical Properties Of Concrete At Early Ages, Peter G. Hansen

Masters Theses

"One of the principal types of heavy duty pavements in use in Missouri and in many other states is that known as rigid type portland cement concrete.

There have been two major trends in this type of pavement design. One of these trends is the use of short slabs, i.e., 15 to 25 feet, with no reinforcement. Another trend consists of concrete slabs containing distributed reinforcement such as wire mesh or reinforcing bars with joints occurring at fairly large intervals of 50 to 100 feet. As loads on the highways have increased the designers have increased the slab thicknesses and …

Phase Relationships In The Quaternary System Lime-Titania-Zirconia-Silica, Robert Martin Gruver

Doctoral Dissertations

"The phase compatibility relationships for the quaternary system lime-titania-zirconia-silica have been determined by a solid-phase-reaction technique.

Preliminary division of the system into Alkemade tetrahedra was based on the phases found in samples by X-ray diffraction analysis. These samples covered the entire volume of the tetrahedron in a systematic fashion. When the quaternary system had been divided into regions or compatible phases, an analytical method was used to calculate the phase composition of each sample. The relative amounts of each phase in a sample determined by X-ray analysis were compared with the calculated quantities, and agreement between the two methods verified …

A Study Of The Production Of Thorium Nitrate, K. P. Chona Panikkar

Masters Theses

"The purpose of this investigation was to study the various methods of producing Thorium Nitrate from monozite sand. This investigation includes a study of the Chemistry of Thorium and estimation of the Thorium Oxide content of monozite sand obtained from North Carolina"--Introduction, page 1.

Heat Transfer Coefficient Of Paint Films, Richard F. Justus

Masters Theses

"Many studies of heat transmission have been carried out on various kinds of surfaces. But relatively few investigators have studied the loss of heat from a painted surface. Any surface will lose or gain heat by one or more of the three mechanisms of heat transmission: conduction, convection, and radiation. These mechanisms are thoroughly discussed by McAdams.

Heat transmission can be analyzed by determining thermal conductivity for conduction, overall coefficient for convection, and emissivity for radiation. The resistance concept is useful in indicating the various components of the overall coefficients and in analyzing problems in thermal conduction.

In studying heat …

Investigation Of The Current Distribution On An Antenna In A Waveguide, David J. Freeman

Masters Theses

"In a communication system composed of several networks and transmission systems, it is necessary for all parts of the system to be impedance matched so that medium energy transfer is possible.

One of the recent transmission systems which has been developed is the wave guide. With the advent of the wave guide the communication engineer is immediately faced with the problem of coupling existing systems and networks to his newly found mode of transmission.

Practically this coupling problem reduces to one of feeding radio frequency energy to the wave guide with some conventional transmission line such as a coaxial line. …

Promotion Of Dropwise Condensation By Silicones, Charles Orlando Reed Jr.

Masters Theses

"Within this rather extensive field of study, transfer of heat through fluid films and heat transfer during the condensation process have been the subject of considerable thought and investigation both from a theoretical standpoint and with the aim of collecting data on specific systems to aid the design and construction of equipment in which heat transfer is involved….

The phenomenum of dropwise condensation has not become a common one in industrial practive for a number of reasons, namely, the difficulty in maintaining the activity of the promoter without frequent makeup because of impermanent attachment and volatility, the difficulty in finding …

Development Of Large Hole Burn Cut Drift Rounds, Joseph J. Yancik Jr.

Masters Theses

"A decided change in the attitudes of mining management toward the need for mine research has taken place during the past decade. More emphasis is being placed not only on the improvement of existing mining methods, but also on the adaptation of new ideas. As the depletion of the high grade ore deposits in this country becomes a reality, the need for reducing the costs of mining is pressing. The successful exploitation of low grade ore bodies will depend upon the continued advancement in the science of mining.

The methods used today in driving a small drift or tunnel in …