Engineering Commons^™

An Electromagnetic Boundary Value Problem In An Inhomogeneous Medium, Thomas Franklin Ezell

Electrical and Computer Engineering ETDs

This dissertation presents a general theory for the solution of electromagnetic boundary value problems for regions which are not homogeneous. The theory begins with the wave equation in Fourier frequency domain for the electric field in the interior of a closed volume; the electromagnetic property parameters, specifically conductivity and dielectric constant, are written as functions of position. The wave equation, which holds throughout the interior of the closed volume, is then converted to an integral equation by use of a Green's function for the same volume containing a homogeneous medium. Boundary conditions between homogeneous regions inside the closed volume appear …

Acuta Enews May 1972, Vol. 1, No. 5

ACUTA Newsletters

In This Issue

First Annual Conference

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Diaphragm Braced Channel And Z-Section Beams, George Winter, Nuri Celebi, Teoman Peköz

CCFSS Library (1939 - present)

PREFACE Cold-·formed channels and Z-shapes are widely used as purlins supporting roof surfaces which consist of light-gage steel panels or other material. If the panels are interconnected to form diaphragms, they brace the purlins and increase their carrying capcity sizeably. It is the purpose of this investigation to explore this bracing effect and provide tools for its utilization in~design. The author wishes to express his gratitude to Professors George Winter and Teoman Pekoz, Project Directors. Their suggestions, criticism and guidance made this work possible. The research project covered by this report was sponsored at Cornell University by the American Iron …

The Structural Behavior Of Cold-Formed Steel Members With Perforated Elements, Charles S. Davis, Wei-Wen Yu

CCFSS Library (1939 - present)

PREFACE This report was originally a dissertation presented to the Faculty of the Graduate School of the University of Missouri-Rolla in partial fulfillment of the requirements for the Degree of Doctor of Philosophy in Civil Engineering, for conferment in May 1972. The research project described within was sponsored by American Iron and Steel Institute through a Special Engineering Fellowship in the fiscal year 1970-71. The author wishes to thank Dr. Wei-Wen Yu, Associate Professor of Civil Engineering, University of Missouri-Rolla for his invaluable guidance in his joint capacity as the project director and as major advisor of my advisory committee. …

Ole Miss Engineer 1972

Ole Miss Engineer

No abstract provided.

Photo And Magnetic Gated Bi-Directional Counter, Charles Burdette Kraemer

Graduate Research Papers

The purpose of this study is to investigate digital counter circuitry, digital logic, and some special applications of digital display systems. The technical data and information ascertained from the research will be used to design and develop a four-digital counter with photo and magnetic gated inputs.

The Use Of Soil-Cement As A Highway Material, Vongchai Jarernswan

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Soil-Cement is not a new material; its low cost but high quality make it well-known and the use of this material for highway, dam, and airfield purposes increases every year. The origin of the idea of mixing soil and cement to produce a structural material has not been definitely established; informal records show that mixing soil and cement was tried in Iowa, Ohio, Texas and probably in other places by 1920 (1). Since the first controlled soil-cement construction was carried out near Johnsonville, South Carolina in 1935 (2), soil-cement has been considered a valuable engineering material. It is now an …

Proposed Remedies: Unstable Embankment At Mile Post 188 And Channel Erosion At Mile Post 190-191; I 64, Boyd County, David R. Houchin, James H. Havens

Kentucky Transportation Center Research Report

The Department became aware of fill slippage on I 64 some 300 feet east of mile post 188 during the summer of 1967. In September of that year Mr. L. E. Richardson, Division of Maintenance, and Mr. Gordon D. Scott, Division of Research, made an inspection of the area. Mr. Scott reported cracking of shoulder, movement of the guard rail, and a failure in the berm along the toe. However, subsequent inspections showed the slip to be stabilizing by itself until late in 1970 when some additional movement was observed. In January of 1971, the most conspicuous pavement failure was …

An Analytical Study Of The 1971-72 Cooperative Vocational Program In Utah With Comparison To A Guideline For Cooperative Vocational Programs, George C. Ku

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was (1) to develop a guideline for cooperative education; (2) to determine the current status of cooperative vocational education in Utah; and (3) to compare current practices with the established guideline.

This study was completed in two parts. The first part involved the construction and verification of a guideline for cooperative education in Utah; the second, a survey of the current status of cooperative education. A descriptive survey technique was employed to gather data required for determination of the guideline's validity and relevance, and the current status of cooperative education in Utah.

All 13 key …

Traffic Controls For Maintenance On High Speed Highways, William M. Seymour

Kentucky Transportation Center Research Report

Observations were first made at lane closures on interstate highways where yellow warning signs were erected routinely in conjunction with contract work. Later data provided direct comparison between new yellow and new orange signs. One sign scheme was used throughout the study. Driver obedience improved when new signs of either color were used; this finding implies that signs should always be maintained in good condition. Orange signs were slightly more effective than yellow signs in reducing traffic conflicts and merges near the traffic cones. The results of the study tend to support the adoption of orange as the standard color …

Crystal Growth And Electrical Properties Of Some Pbte-Snte Alloys, Adel Fayez Seif

Archived Theses and Dissertations

No abstract provided.

The Optimum Design Of A Shock Absorber To Minimize The Force Transmitted To The Supporting Base Of A Vibrating Equipment, J. P. Singh

Theses and Dissertations

The present study involved two types of analyses as a part of the investigation leading to the design of a shock absorber providing optimal vibration control and minimum transmissibility. Those two types of analyses were the following.

The Dynamic Characteristics Of A Beam Whose Material Is Represented By A Three-Parameter Viscoelastic Solid, Vishnurao K. Devkar

Theses and Dissertations

Man observes many phenomena occurring in nature which he can use to his benefit. He observes how physical quantities vary as a function of their environment in order to predict how these variations will affect a system he wishes to design. For this purpose, he must establish a model that is representative of the relation between those physical quantities and certain environments to which they are subjected.

Application Of The Maximum Deformation Theory Of Failure To The Torsional Failure Due To Fracture Of 4140 Steel, C. V. Krishna Kumar

Theses and Dissertations

Forming is the fastest way of changing the shape of a piece of metal. It is the most economical process to use for high-volume mass production when the shape of a part is such that it can be made by one of the forming operations

The Longest Flight, Tim Brady

Publications

Recounts the last leg of a ferry mission in a C-7 from Southeast Asia to Okinawa where the aircraft experienced serious malfunctions. Rescue accomplished just short of destination with very minor injuries to flight crew after ditching.

Photo Chemical Milling, Terry R. Smith

Graduate Research Papers

This study is concerned with the techniques used in the production of metal parts by the use of photofabrication. Included will be a research of the historical background of the industry, and the production processes used by the photofabrication industry that apply to this project. Information will include careers, education, current status of the industry, as well as methods for implementing the processes into the industrial arts curriculum.

Hybrid Computer Modeling Of The Hydro-Salinity Flow System Within A River Basin, Duane R. Jensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As demands upon available water supplies increase, there is an accompanying increase in the need to assess the downstream consequences resulting from changes in the upstream hydrologic system and salinity flow system.

Since the burden of water quantity and quality maintenance must be shared by the users, predictions are needed for quantity and quality changes which might result from contemplated development at any specified location within the river system. A close relationship between the hydrologic and salinity flow systems exist, thus making it necessary for an understanding of both systems in order to properly manage the salinity system.

This study …

Simulation Of The Dynamics Of Erodible Streams, Kousoum S. Sakhan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The movement of translatory waves over an erodible stream has a critical influence on the time of rise of the hydrograph which, in turn, affects the stability of the stream channel. In the present study, the movement of these flood waves is described by the one-dimensional equations of continuity and motion which are obtained by the space integration of the three-dimensional equation of continuity and Reynolds equations. The flow of suspended sediment is described by a one-dimensional dispersion equation which is derived from a three-dimensional equation of conservation of solid mass in the flow. With some modifications the one-dimensional dispersion …

Effects Of Land Use On Water Quality: Summit Creek, Smithfield, Utah, David W. Meyers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of various land uses on water quality in Summit Creek were evaluated during the period beginning March 13, 1971 and ending October 27, 1971. Potential sources of pollution investigated were: (1) septic tank use, (2) feedlot runoff, (3) urban runoff, (4) rural runoff.

Samples were collected from five sampling stations on 16 separate days during the sampling period. Analyses were performed to determine the following constituents: ammonia, nitrite, nitrate, total phosphorus, orthophosphate, coliform bacteria, chloride, suspended solids, volatile suspended solids, total carbon, organic carbon, temperature and pH.

Agricultural activities, including livestock feedlot operations, were identified as the major …

Determination Of Drag And Lift Coefficients For A Spinning Baseball, M. B. Parekh

Theses and Dissertations

Few experiments have been carried out in the past to deter mine the effect of the lift and the drag forces on the trajectory of a ball used in any game. In a baseball game, it was reported that sometimes the ball took a sharp turn aburptly in the region of 15 to 20 feet from the home plate. This indicated a sudden change of the forces acting on the ball. The principal forces acting w ere as fol lows: 1. Weight of the ball. 2. Drag force acting in the direction parallel to the relative wind. 3. Lift force …

A Study Of The Effects Of Water Institutions On Planning And Management Of Water Resources In Utah, Donald H. Mclean

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

One area of research that has been somewhat neglected in water planning programs and water development is that pertaining to water law and water institutions. Over the years each state has developed a complex system of water law and organizations for the allocation and distribution of water. The usual role of these institutions is one of orderly development and the efficient use of the water resource. However, in many cases water law and institutions have imposed serious constraints upon the planning and the most efficient use of a valuable resource.

This study, through historic research, has attempted to define these …

The Development Of Langmuir's Adsorption Isotherms For Glucose And Fructose And The Separation Via Continuous Parametric Pumping, Jafir Abbas Jaferi

Theses

The adsorption equilibria and adsorption rates of fructose and of glucose on aqueous suspensions of fullers earth were determined at various temperatures. The Langmuir adsorption equations were fitted to the equilibrium data and the Langmuir constants were determined so that isotherms could be developed for any pair of parametric pumping operating temperatures.

This glucose+fructose+water system was then subjected to continuous thermal parametric pumping for the separation of glucose and fructose. The operating conditions required for the separation were determined from the experimental adsorption rates and equilibrium isotherms. Samples taken from the continuous top and bottom streams were analyzed by polarimetry …

A Study Of The Effect Of A Dielectric Field On The Solvolysis Rate Of Tert-Butyl Bromide In A Recycle Reactor, Rolf L. Ball

Theses

Previous experiments at Newark College of Engineering have shown that a dielectric field can effect the rate of a chemical reaction. A theory was developed in this thesis to postulate how a dielectric field can increase the rate of a first order reaction whose rate determining step is an ionization. An experimental procedure was developed to measure the reaction rate constant of a tertiary alkyl halide with a solvent to test this theory. The solvolysis of tortbutyl bromide in aqueous ethanol (80%), aqueous dioxane (75%) and aqueous acetone (75%) solvent systems were the reactions selected for study. A total of …

Dynamic Response Of Predictions Of Reinforced Concrete Beams, Lawrence D. Reaveley

Civil Engineering ETDs

Prediction of the dynamic response of reinforced concrete beams by various analytical model techniques was considered. Four models were studied: (1) an elastic or elasto-plastic SDF model, (2) an SDF model based on experimental force-displacement data, (3) an SDF model based on a theoretical moment-flexural rigidity relationship, and (4) an MDF model based on a theoretical moment-flexural rigidity relationship.

Beam response, as predicted with the various models, was compared to experimental response data obtained from simply supported, singly reinforced, concrete beams. Static and dynamic response was considered. Dynamic model modifications for the stiffness, yield strength and damping were studied. Nominal …

Lowering The Transportation And On Site Labour Costs - Some Proposals, Iraj E. Majzub

International Symposia on Low Cost Housing Problems

No abstract provided.

Suspended Modular Component System, Lawrence C. Abell, Conrad P. Heins Jr.

International Symposia on Low Cost Housing Problems

No abstract provided.

The Sears Eco-System Home, Jack R. Warner, G. Day Ding

International Symposia on Low Cost Housing Problems

No abstract provided.

Housing Design Process And Ekistics -- A Systems Approach, Jawalker K. Sridhar Rho

International Symposia on Low Cost Housing Problems

No abstract provided.

Use Of Pressurized Membranes As A Low-Cost Erection Scheme For Concrete Structures, John W. Leonard

International Symposia on Low Cost Housing Problems

No abstract provided.

The Technology And Management Of Mobile Home Production, Arthur D. Bernhardt

International Symposia on Low Cost Housing Problems

No abstract provided.