Electrical and Computer Engineering Commons^™

A Five Dimensional Field Theory., Scott Holzhauser

Electrical and Computer Engineering ETDs

Several authors in the past have utilized the five dimensional manifold to accomplish their ends, as the next few sections explain. The ends are frequently different, however, Corben1,2 relates his fifth dimensional variables to rest quantities, such as the "rest mass density" and "rest charge density." Flint3,4,5 uses x as an unobservable 5 cyclic coordinate, and Ingraham6 interprets x as a "parameter of finiteness" that keeps finite the usual field quantities.

An Acoustic Antenna With A Hollow Searchlight Pattern, Thurlow W.H. Caffey

Electrical and Computer Engineering ETDs

Economy, repeatibility, and convenience make it desirable to model a radar system by means of an acoustic system. The modeling is based upon the fact that, in a lossless medium, both EM-waves and acoustic waves obey a traveling wave equation of the same form. Furthermore, the field components of a plane wave in each system are related to each other by equations of the same form.

Adaptive Communication Systems, Arthur M. Breipohl

Electrical and Computer Engineering ETDs

The purpose of this study is to investigate an "adaptive" communication system in order to characterize the elements of adaptation. Although the term "adaptive" does not have a universally accepted meaning in the technical literature, it is usually applied to systems that have a significant ability to adjust their performance automatically over relatively wide variations in environment. In this sense almost any feedback system is adaptive, but the term is usually reserved for the more exotic systems which appear to make a deliberate effort to monitor the environment and then adjust their performance. Man is usually taken as the primary …

Computation Of The Dipole Moment Of A Coaxial Antenna In Sea Water., Richard B. Reinman

Electrical and Computer Engineering ETDs

The purpose of this paper is to develop a meaningful expression for the dipole moment in dissipative medium. Since the dipole moment is dependent on the current distribution which in turn is a function of system parameters, and might well start with determination of the input impedance. Two of the most popular methods for determining input impedance to a radiator in an air medium are 1) the induced emf method, and 2) a method whereby the power flow across a spherical surface is calculated as the radius of the sphere becomes infinite. Both methods assume a current distribution; only the …

Wave Propagation Past A Change In Cross-Section, Samuel A. Cone

Electrical and Computer Engineering ETDs

This thesis was undertaken to accomplish the following:

1) To experimentally determine the longitudinal strain distribution in the region of a change in cross-section of a cylindrical bar when a longitudinal wave passes this region.

2) To experimentally determine the longitudinal strain distribution in the incident, reflected and transmitted waves produced by a longitudinal wave in the region of a change in cross-section of a cylindrical bar.

3) To experimentally observe, at a distance of several bar diameters away from the change in cross section, the relation between the magnitudes of an incident longitudinal wave and the reflected and transmitted …

Fortran For The Maniac, Richard C. Lindberg

Electrical and Computer Engineering ETDs

It is not the intent of this thesis to present the rules of FORTRAN; it is assumed that the reader is generally familiar with the principles of FORTRAN programming. Rather, this is an attempt to describe FORTRAN in relation to the compiler program it actually is -- a machine language program which translates FORTRAN statements to machine language instructions, the latter capable of being executed by the same computer. The FORTRAN statements will be interpreted in terms of the compiler program which performs the translation, and algorithms for these statements will be described.

Programming Manual For The Maniac Assembly Routine, Robert C. Ashley

Electrical and Computer Engineering ETDs

No abstract provided.

An Investigation Of Methods For Analyzing Networks Containing One Nonlinear Element, Dustin J. Wilson

Electrical and Computer Engineering ETDs

The inclusion of a single nonlinear element in a general N-loop network greatly complicates the resulting equations and prohibits a straightforward solution. The object of this investigation is to provide a method for solving such networks. In particular, a reduction of the network coefficient matrix will be considered in order to obtain one nonlinear equation and (N-1) linear equations. It will be shown that the form of the nonlinear equations is always the same, and a procedure for approximating the solution of equations of this type will be given.

A Unique Analog-To-Digital Voltage Conversion Network, Thomas O. Summers

Electrical and Computer Engineering ETDs

The increasing utilization of digital data acquisition systems has resulted in the design and development of a large number of different analog-to-digital voltage converters. Each of these designs exhibits varying specifications with regard to accuracy, speed, environmental tolerance, reliability, and cost.

These specifications are usually interrelated and the nature of the interrelations are, in turn, related to the design approach.

As an example of these interrelations, one could consider the specifications of a converter designed around an electro-optical approach requiring a cathode ray tube with coding mask. In this approach, the analog input voltage causes the deflection of a swept …

Measurement Of Thin Film Thickness By The Crystal Resonance Method, David G. Adams

Electrical and Computer Engineering ETDs

Recent years have seen a tremendous increase in thin film activity. The electronics industry, in particular, has become increasingly active in the development and production of thin film components and complete micro-electronic circuits laid down as thin films. The principal methods of producing thin films are by chemical and electrolytic processes, and by evaporation and sputtering in vacuum. One of the problems associated with film deposition in vacuum involves the measurement of film thickness, a difficult task because: 1) the thicknesses encountered are typically measured in hundreds of angstroms; 2) the films are not physically flat; and 3) they do …

Properties Of Radar Augmentation For Missile Targets., Warren T. Randall

Electrical and Computer Engineering ETDs

This thesis presents a study made to investigate problems involved in the design of certain radar augmentation devices. The task arose from the requirement to add realistic simulation of radar reflection characteristics to drone targets during an evaluation of the performance capability of the Falcon missile, conducted by Hughes Aircraft Company at Holloman Air Force Base, New Mexico. In addition to performing a mathematical analysis of the problem, the author who asked to design and build equipment which would present a visual demonstration of the reflection activities. The necessary definition of radar properties and a description of the test equipment …

An Approach To Correlate Pulsed Radar And Photographic Data, Nasir Ahmed

Electrical and Computer Engineering ETDs

The Jet Propulsion Laboratory Lunar Program, which is supported by the National Aeronautics and Space Administration has two major projects underway. These are Ranger and Surveyor. The Ranger Project is in the flight stage whereas Surveyor is still in hardware development. The equipment of Ranger 3, 4, and 5 spacecrafts includes a radar altimeter to obtain radar reflection data, and a vidicon camera to obtain close-up pictures of the moon's surface. The data obtained in these flights will thus be available for analysis and comparison using the techniques outlined in this thesis.

The Monopole Antenna With A Small Number Of Radials, S. H. Durrani

Electrical and Computer Engineering ETDs

This paper reports a study of an antenna system consisting of a vertical monopole and a small number of insulated horizontal radials lying lightly on the ground.

The monopole antenna has long been popular for medium frequency broadcasting because of its inherent simplicity and economy. Although quarter-wavelength resonant structures were used in the early days, it was shown by Ballantine (1924) that for a given power, the strongest field strength at the radio horizon was produced by an antenna about 0.6 wavelength long. This ignored the sky wave and was based on the assumption of a perfectly conducting (and reflecting) …

Hypersonic Plasma Thermionic Generator, Andre R. Leblanc

Electrical and Computer Engineering ETDs

The Langmuir two-probe system is extended to cover the case of electron emission from one of the probes. The contact potential difference between the two probes is also included as part of the equations. One of the probes, known as the emitter, operates at sufficiently high temperatures such that electron emission occurs, while the other probe, known as the collector, operates at low enough temperatures such that its electron emission can be neglected.

Linear Side-Loaded Transmission-Line Antennas, Robert W. Kulterman

Electrical and Computer Engineering ETDs

A need has arisen in recent years for a mobile transmitting antenna capable of radiating large amounts of power as efficiently as possible in the frequency range from 10 to 40 kc. Several mechanical and electrical problems are encountered in building and operating such an antenna.

Unm Snail Programming Manual, Paul Edward Presson

Electrical and Computer Engineering ETDs

The purpose of this thesis is to provide an introduction at the high school level to the principles of programming digital computers and to serve as a programming manual for the UNM SNAIL. The thesis is self-contained; that is, it may be read without reference material to provide a general background knowledge of computer programming.

Electromagnetic Radiation In Magneto-Ionic Media For Vlf And Vhf Spectra, Kenneth R. Cook

Electrical and Computer Engineering ETDs

The interaction of electromagnetic fields and magneto-ionic media has received considerable attention in the last few years. In rather general terms, the investigation of these phenomena can be categorized into two basic classes. In one class of investigation the primary interest is the dynamic nature of the plasma when subjected to specialized forms of electromagnetic fields. This branch of science has various nomenclatures such as hydromagnetics, magnetohydrodynamics, plasma physics and numerous others implying the use of high density ionized gases interacting with electromagnetic fields. Controlled fusion processes for transforming energy states is an example of this branch of electromagnetics and …

Some Design Criteria For Open-Ended Microwave Cavities, Richard O. Gilmer

Electrical and Computer Engineering ETDs

Primarily this paper describes the electromagnetic problems involved in determining a proper waveguide size for the ^TE11N cavity and its terminations. Also, one chapter is devoted to construction techniques used in the construction of open-ended sampling cavities. The approach one may use for aerodynamic improvements of the cavities is discussed, but no conclusions can be drawn about the design's validity since no experimental tests were taken.

This paper will describe the design, construction, and testing of a microwave cavity, the end plates which are replaced by terminations which allow up to 93% of the cross-sectional area of the terminations …

An Automatic Standard Cell Comparator, D. W. Braudaway

Electrical and Computer Engineering ETDs

No abstract provided.

Counter Circuits Using Gaseous Discharge Tubes And Rectifiers, Robert Creveling

Electrical and Computer Engineering ETDs

This thesis pertains to an electric circuit consisting of gaseous discharge tubes and rectifiers arranged to comprise a counting or integrating device for electric impulses impressed on the system. The ideas presented herewith are wholly those of the author and were submitted in the form of a patent application via the New Mexico School of Mines in June 1950. The basic idea for such a circuit was conceived on November 14, 1949.

Conduction Phenomena Of Reduced Titanium Dioxide With An Oxide Surface Layer, Richard Bechtel

Electrical and Computer Engineering ETDs

No abstract provided.

Linear Time Base Precision And The Compound Sweep Concept, William W. Steger

Electrical and Computer Engineering ETDs

This paper is a monograph on general precision criteria for feedback linear time base circuits. The linearity and stability performance of these devices is evaluated in terms of deviation from an ideal ramp function.

In its entirety, the paper attempts to provide a complete reference for the most commonly encountered aspects of time base precision. Attention is centered on what could be called the "low frequency" case, which most often is valid in applications requiring a high precision time base.

The subject is developed in a number of progressive, cumulative stages. The end products at each stage of the analysis …

A Prototype Transmitter For A Microwave Refractometer, John C. Jordan

Electrical and Computer Engineering ETDs

A study of the design, development and fabrication details of a transmitter for a microwave refractometer is presented. Atmospheric, radio frequency, refractive index is to be measured rapidly and directly up to altitudes of the order of 200,000 feet. Requirements for the transmitter with regard to its weight, volume and environment are indeed stringent since it is proposed to package the transmitter in a ogive configuration and elevate it to these altitudes utilizing a rocket propulsion system.

Complementary Transistor Memory Circuit And Logic Applications, Lee M. Bossart

Electrical and Computer Engineering ETDs

No abstract provided.

An Approach To Azimuth Angle Refraction Corrections, Wallis R. Cramond

Electrical and Computer Engineering ETDs

In the past, analyses of tropospheric reactions of electromagnetic waves propagating in the atmosphere have been based on spherically symmetric medium. However, this applies only to ray bending in a vertical plane (elevation angles). Numerous methods have been developed to correct for elevation angle errors. In 1961, the presentation of a new method for use in a nonsymmetric atmosphere revived interest in horizontal (azimuth angle) bending. In order to use this method to test significance of azimuth angle errors, the spacial distribution of index of refraction must be known.

The primary objective of this paper is to propose a model …

A Theory Of Self-Evaluating Discrete Communication Systems, Samuel D. Sterns

Electrical and Computer Engineering ETDs

No abstract provided.

Radar Back-Scatter Theories For Near-Vertical Incidence And Their Application To An Estimate Of The Lunar Surface Roughness, Harbhajan S. Hayre

Electrical and Computer Engineering ETDs

This work, after the critical examination of the theoretical background on back-scattering from rough surfaces, offers a new approach to its theory. Various back-scatter theories, as well as the statistical models of terrain and moon assumed therein, are critically reviewed and correlated. A new approach which uses a simple statistical model is then presented for the description of scattering of electromagnetic waves from a rough surface. The statistics of a rough surface are discussed in terms of certain parameters which can be easily associated the surface features, and a new expression for the back-scattering radar cross section per unit area …

A System For Recording Electromagnetic Atmospheric Noise In 30-50 Cps Region, James F. White

Electrical and Computer Engineering ETDs

The electromagnetic noise spectrum extends from below 1 cps to above 3,000 mcs. Within this spectrum many phenomena of atmospheric noise have been observed. Those atmospherics which occur in the audio frequency region of the spectrum have been given not only descriptive but also subjective names by many different investigators. As a result, it is often difficult to determine from the literature what aspect of the noise phenomenon is being considered. In addition, references to low frequencies involved in certain experiments are vague. A brief history of atmospherics research is presented here in order to explain the terminology, to show …

A Study Of Gamma-Ray Photoconductivity In Organic Dielectric Materials, Stanley E. Harrison

Electrical and Computer Engineering ETDs

The gamma-ray photoconductivities of polyethylene, polystyrene, polyvinylchloride, polypropylene, Teflon, Nylon, Kel-F, and three thermosetting resins denoted as Epoxy 1478-1, 1478-3, and 1478-22 have been measured. The measurements were made at steady-state gamma-ray intensities ranging from 1.0rad(H₂O)/min to 3.0 x 10⁵ rads(H₂o)/min and at controlled temperatures ranging from 90 degrees Fahrenheit to 140 degrees Fahrenheit. Conductivity changes resulting from the steady-state gamma-ray exposures were measured continuously throughout the exposure and after the exposure. The exposure period was of sufficient duration to allow all samples to achieve an equilibrium conductivity value.

A Qualitative Study On An Exploding Wire Fuse, W.D. Lacoss

Electrical and Computer Engineering ETDs

This study was undertaken in an effort to develop basic concepts of normal operating fuse criteria that will apply to capacitor energy storage systems. To develop ideas germane to normal fuse operating limits, it was necessary to consider certain principles that preceded this development: (1) A review had to be made of some of the experimental work on the exploding wire phenomenon to indicate a possible application as a fuse; (2) A typical circuit requiring such a fuse had to be described schematically and analyzed to show the dependency between the circuit parameters and the necessary conditions for obtaining fusing …