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An Investigation Of The Order-Disorder Transformation In The Nickel-29.1 Per Cent Molybdenum Alloy By Electrical Resistivity Measurements, Beryle Thomas Lampe

Masters Theses

This investigation is a continuation of research on the nickel-molybdenum binary alloy system which has been in progress in the Department of Chemical and Metallurgical Engineering of The University of Tennessee for the past several years in association with the Oak Ridge National Laboratory. The purpose of the present investigation was to develop an electrical resistivity method for studying the order-disorder transition in the nickel-molybdenum alloy of stoichiometric composition, Ni₄Mo.

The alloy containing 29.1 weight per cent molybdenum in nickel was prepared by melting 250-gram ingots in a direct arc furnace under an inert gas. These were homogenized …

Comparison Of Methods For Equipment Replacement Decisions With Emphasis On The Mapi System, Seetharama Lakshmi

Masters Theses

It has usually been the prime responsibility of the general managers of manufacturing plants to increase the rate of return. Once an investment is made, it is largely irreversible. So the formulation of an equipment purchase or replacement policy plays a major role in achieving their goal. Since all durable goods are not like the "wonderful one horse shay" -- which lasted exactly one hundred years to the day, and fell apart completely, all at once -- the problem of when to replace them is a critical one.

The management is interested in obtaining the best possible piece of equipment …

Entrance Effects In Non-Newtonian Pipe Flow, Herman Leslie Lanieve

Masters Theses

[Abbreviated]

The prediction of the excess pressure loss accompanying the flow of a fluid through a sharp-edged contraction (from a large reservoir into a small tube) has been the subject or many theoretical analyses. Recent analyses have been concerned with a general "power law" non-Newtonian fluid. However, few experimental measurements, either of pressure losses or of velocity profiles, have been made, especially for non-Newtonian fluids.

In this investigation the entrance region pressure profiles were measured for an ethylene glycol-water solution, which was Newtonian, and for Carbopol-water gels of several concentrations, which were non-Newtonian. The flow was in the lamina regime …

Cophasal Excitation Of Circular Antenna Arrays, Chang-Keng Kuo

Masters Theses

[From the Introduction]

An antenna array consists of a set of individual radiating elements, each having a current of some amplitude and phase. If the each of the phases is chosen so that there is some direction in space for which the fields from the individual radiators add in phase, the array is said to be cophased, and the excitation is said to be cophasal. This thesis is concerned with some of the characteristics of cophased circular antenna arrays.

By far the most common antenna array is the linear array, in which the elements are equally spaced along …