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Equivalent Circuit Of Unsymmetrical Inductance Diode Using Linvill Lumped Model, Donald Lawrence Willyard

Masters Theses

"Integrated circuit techniques and applications are rapidly changing the electronics industry. A problem common to both state-of-the-art approaches to integrated circuit fabrication is that of miniaturizing and integrating inductors. It is found that, for a certain range of injection current levels, certain unsymmetrically doped junction diodes have an inductive small-signal impedance. This thesis discusses the theory of inductance diodes and applies finite difference equations and the Linvill lumped model to the differential equations that describe their carrier flow processes. The static I-V characteristic and the small-signal equivalent circuit at high injection densities are derived. The elements (R,L,C) of this equivalent …

A Study Of The Photomechanical Effect In Silicon, Ronald M. Oglesbee

Masters Theses

"This paper presents the results of an experimental investigation into the photomechanical effect in silicon. The effect was found to be very similar to the electromechanical effect. In both cases the phenomena observed is the softening of a thin surface layer of the material when it is either illuminated or when a current is flowing through the material. An anisotropy was observed in both the hardness and the photomechanical effect. Increasing temperatures tended to "washout" the photomechanical effect. The surface hardness and the photomechanical effect were found to depend heavily on proper surface preparation of the samples, however little dependence …

The Prediction Of Mix Design Properties For Dense Graded Bituminous Mixtures, Robert Ernest Weeks

Masters Theses

"The purpose of this investigation was to ascertain the feasibility of interpolating values of the physical properties of a dense graded bituminous mix between known values. Also the effects of limestone mineral filler on the properties of a dense graded mix are evaluated. The variables in this study were mineral filler and asphalt cement. Control mixes were established at 2, 6 and 10 percent mineral filler and experimental mixes were prepared at 4 and 8 percent filler. The aggregate consisted of limestone and was mixed with an asphalt cement of 85-100 grade penetration. Al mixes were tested by the Marshall …

Effect Of Single Stirrups On Reinforced Concrete Beams, Vinodbhai T. Patel

Masters Theses

"This study was made to determine the location of vertical stirrups and also to determine the amount of stirrup-steel required to prevent diagonal cracking. The study is limited to rectangular, simply supported, reinforced concrete beams subjected to a concentrated point load at the center of the span. Five sets, each containing three beams were tested. Two sets were cast without stirrups and the results were used to locate the stirrups for the remaining tests. The other three sets were cast with one stirrup on either side of the central load. Stirrups were of the "U" type and formed form No. …

The Design And Construction Of An Instrument For Calibrating Accelerometers, Richard Rabenau

Masters Theses

"The purpose of this work was to design and construct a facility to calibrate accelerometers. A ceramic piezoelectric shaker and modified Michelson interferometer together with necessary electronic equipment were used. The system produced accurate and stable acceleration at five discrete points from 1,000 to 5,000 cycles per second. the maximum calibration levels were approximately 50 g's"--Abstract, page ii.

Optimum Finite Memory Nonlinear Filter, Ching-Chyoun Yang

Masters Theses

"This thesis investigates the possibility of using the Zadah theory and a machine type computer to design an optimum finite memory nonlinear filter for extraction of Poisson distributed signal pulses from a background of Gaussian noise. Basically the procedure involves the technique of solving simultaneous equations by the computer. We demonstrate that it is possible to find the limitation of the filter of class N₁ in terms of an absolute minimum mean square error. However, due to the capacity of the computer we do not actually determine the absolute minimum. Nevertheless we do show that the mean square error decreases …

Stability Determination By Liapunov's Method In Nonlinear Control Systems, Neng-Chung Liao

Masters Theses

"An introduction to Liapunov's second method as it applies to control system stability is presented in this work. Main theorems and definitions of Liapunov's method are treated. In particular, Lur'e's method and Szego's method for testing the stability of a nonlinear system are presented, and several examples are used to illustrate these procedures"--Abstract, page ii.

Use Of Spent Sulphite Liquor For Stabilization Of Fractured Rock And Sealing Off Water Bearing Formations, Laxman Singh Sunda

Masters Theses

"The paper industry, in its process of manufacturing pulp from wood, produces large quantities of a substance called lignin, lignin sulphite, or lignosulphonate. This material has been disposed of as a waste product; however, it does have many potential uses. In this investigation, lignosulfonates were used as agents for bonding rock sections together and, as the chief component of gels, for filling the pores of artificial rock cores. The purposes of these tests were to find how this substance could be used in the mining industry, for stabilizing fractured ground around mine openings and for sealing off water influx into …

An Instrument For The Measurement Of Anelastic Properties Of Glass, Thomas Frederick Miller

Masters Theses

"An inverted torsion pendulum for measuring the internal friction and dynamic shear modulus of glass fibers over an extended temperature range has been constructed and calibrated. The calibration consists of the determination of the moment of inertia. Extraneous damping losses were investigated and primary sources were found to be (1) the suspension thread, (2) the method of securing the fiber and (3) air damping. Anelastic measurements were made on an annealed vitreous silica fiber and a soda-lime-silica fiber"--Abstract, page ii.

Detection Of Stress Corrosion Cracking In U-Bend Brass Specimens By An Electro-Mechanical Method, Floyd Elwin Loftin

Masters Theses

"An apparatus was designed and built which held two u-bend specimens. When the specimens were exposed to a corrodent, losses in strength were detected as a result of stress corrosion cracking. The apparatus was used to study time to failure of cartridge brass u-bend specimens exposed to ammoniacal copper sulfate solutions which varied in pH. A minimum time to failure, 1.06 hours, was detected at pH 7.2. The maximum time to failure, for the range studied, was 28.36 hours at pH 7.7.

No useful data were obtained in the range from pH 6.6 - 6.8. thick, black surface coatings were …

An Investigation Of The Effect Of Auditory And Combined Auditory-Visual Cues Upon Judged Intelligibility Of Artificial Larynx Speech And Esophageal Speech, Mary Ellen Carder

Masters Theses

Introduction

Surveys have shown that the incidence of total laryngectomy, surgical removal of the larynx, has increased steadily in the United States since 1947 when a total of 846 cases were reported (19, 20), to the present time when cancer registries indicate that about 4,400 new cases of cancer of the larynx are discovered annually (13). While it is estimated that in the United States at the present time there are 15,000 to 20,000 individuals who have undergone surgical removal of the larynx due to a carcinomatous condition of that organ (27), it is probable that the total population of …

A Study Of Certain Effects Of Local And Topical Anesthetics On The Speech Of Stutterers, Charles Michael Gross

Masters Theses

Chapter I

Introduction

Introductory Statement

The ability to monitor one's own vocal output is essential if one is to produce and maintain normal speech. Speech would become progressively defective if one were unable to detect errors in voice, articulation, or rate. The preservation and maintenance of speech require the coordination of several automatic systems in the human body. One of these systems includes the tactual-kinesthetic purpose of defining the tactual-kinesthetic role and its relation to feedback cues in the production of speech.

Since speech is controlled by more than one automatic feedback system, it is essential that an investigation of …

James P. Newcomb, Texas Unionist And Radical Republican, Dale A. Somers

Masters Theses

James P. Newcomb's life spanned turbulent times in Texas. From the Nova Scotian's arrival in Texas in 1839 until his death in 1907, Newcomb witnessed many major changes in his adopted state. As he grew older, he played an increasingly important part in the state's affairs. Although intended to be a warts-and-all biography, this thesis concentrates on Newcomb's involvement with newspapers and politics from the time of his first venture in journalism in 1854 until his appointment as Texas' Secretary of State in 1870. Reconstruction receives extended treatment because it was during this period that Newcomb emerged from relative obscurity …

The Position Of The City Manager In Decision Making In Kalamazoo, Michigan City Government, John Adrian Straayer

Masters Theses

Purpose and Method

The Purpose

This paper is a descriptive analysis of two aspects of decision making in one council-manager government. First, it is an examination of the relationship between the city council and the city manager, noting the influence of the city manager on policy. Secondly, it is an exploration of the limitations which existing elite group(s) may place on policy decision making by the legal city government.

Construction And Validation Of Six Mental Health Sub-Scales By Age, Sex, And Educational Status, Thomas James Boynton

Masters Theses

Chapter I

Introduction

Purpose of the Study

The topic considered in this thesis is the construction and validation of six mental health sub-scales which are based upon procedures controlling for age, sex, and educational status. Each item in a 22 item mental health scale is tested for validity by age, sex, and educational status. Six sub-scales, one for each dichotomy of the three social groups, are constructed from this procedure. The validity of these sub-scales is then tested via six different criteria of mental health. Finally, the validity of the six sub-scales, the original 22 item scale, and a related …

Southern Expansion In The Caribbean Region, 1850-1860, Keith Ross Speiran

Masters Theses

The Background: 1846-1850

The term "Fillibuster" has a different connotation in modern times than that of a hundred years ago. Today according to The American College Dictionary, the term means, "a member of a minority in a legislative assembly who resorts to irregular or obstructive tactics to prevent the adoption of a measure generally favored, or to force a decision almost unanimously disliked." The dictionary also gives the older definition, which will be used in this paper. This meaning is "an irregular military adventurer; a freebooter or buccaneer."

The purpose of this thesis is to describe a number of …

A Study Of The Government Of Parchment, Michigan, Shirley Forbes Swenson

Masters Theses

Introduction

Suburban-living has become a major part of our culture and the term has been widely accepted and interpreted to mean a distinctive way of life highly advantaged over life in strictly urban or rural settings. The first major move to the suburbs was by the wealthier segments of our society, and the gracious, leisurely pattern of living they sought still colors the popular image of the term "suburban."

Analysis Of The Relationship Of Items On An Employment Application To Length Of Service, Margery Hidenach White

Masters Theses

Certain factors on an application blank may be predictive of length of service and of job success. If personal history items which successfully differentiate between the short-term and long-term employee or the desirable and undesirable employee can be identified, it would assist in the selection process.

A review of recent research concerning factors on an employment application as related to job success reveals that, although considerable research was done in this area during the early 19SO's, there has not been much published in the past two years. Apparently there are three reasons for this: (1) early results indicated high validity …

The Russian Revolution Of 1905 As Depicted By Contemporary American Reports, With Special Emphasis On The "Bloody Sunday" Incident Of January 22, 1905, Patrick Kay Bidelman

Masters Theses

Preface

On Sunday morning, January 22, 1905, a crowd of workers marched through the streets of St. Petersburg, Russia. They were led by a Russian Orthodox priest, Father George Gapon, who had a petition to grievances to present to Czar Nicholas II. As they converged on the square in front of the Winter Palace, they were fired upon by the Imperial troops. The result was a complete military victory for the autocracy and a casualty rate among the petitioners that has caused the incident to go down in history as "Bloody Sunday."

On Monday, January 23, newspapers throughout the United …

An Examination Of The Purchase And Pooling Of Interests Methods For Recording Business Combinations, James J. Leisenring

Masters Theses

Abstract

At the present time corporate business combinations are occurring frequently as they have in two previous periods of American history. The purpose of this study is to examine the two accounting methods which are now used to record business combinations and to study the consequences of having two methods for recording similar business combinations.

The criteria used to choose between the two accounting methods are examined. It is found that the criteria used are unacceptable for selecting one of the alternative methods.

An explanation of the principles involved in recording a combination as either a purchase or a pooling …

Andrew Jackson: Blackbird Of L’Arbre Croche, Grace Walz

Masters Theses

Prologue

I work very slowly on my lecture. My strength is failing and my eyes are so that I cannot use them by candlelight. I have many pages written with pencil and when I can get them copied in ink, I will send them to you.

My object in trying to have this printed is that it might live after I am dead and finally be adopted as the plan or means to bring about the true development of American Indians.

My days are numbered, as I am entirely unable to do any manual labor, not only from old age …

The Development Of Collective Investment Funds For Bank Trust Departments, Floyd L. Parks

Masters Theses

Introduction

In recent years the policies of many of our financial institutions have changed to meet the public demands and the degree of competition. It hasn't been too many years ago when most bankers felt that an automobile loan should be repaid in 24 months rather than the 36 month period which is now common. Some lenders today are even offering a 42 month repayment period. It wasn't too long ago when most banks were paying 2 1/2% on their savings accounts while the standard rate now is 3%, with most banks offering an even higher rate of 4% for …

A Comparison Of The High School Preparation Of The 1956 And 1962 Freshmen At The University Of Kansas With The High School Preparation Of The 1956 And 1962 Freshmen At Eastern Illinois University, Sandra Kay Moore

Masters Theses

No abstract provided.

The Effects Of Granular Size On The Thermal Conductivity Of Fine Sand, Fikri Yalvac

Masters Theses

"The Thomas method (1) for determining the thermal conductivity of solid materials can be used for the determination of the thermal conductivity of granular materials. In this thesis this method has been used to determine the effect of the granular size of sand cn its thermal conductivity.

River sand was classified according to size by the Tyler Standard Screen Scale into 50-60, 50-80, 80-100, 100-200, and below 200 mesh size. These sands were used for the experiments. The clay was separated from these samples to obtain pure river sand for the experiments.

According to the International Critical Tables, the thermal …

Dropouts And Their Relationship To Guidance, Darrell Lower

Masters Theses

No abstract provided by author.

On Optimum Receiver Using Decision Theory, Philip T. Tai

Masters Theses

“In recent years communication engineers have given increased attention to the study of communication through random media. The name random is used to describe a medium the properties of which are stated only in a statistical sense. For example the impulsive response of a certain medium may only be known as one of an ensemble of possible impulsive responses; the particular member of interest being drawn up according to some statistical rule. In other words there exists some "uncertainty" concerning the characteristic description of the medium. Significant work on these problems has been done by Price and Turin. Related work …

An Analysis Of The Simulated Inductande Obtained From Forward Biased Semiconductor Diodes., Everett Harold Vannoy

Masters Theses

"The problem undertaken in this thesis is to study the simulated inductance observed in forward-biased abrupt junction p-n diodes with a highly doped p region and a nearly intrinsic n region and show that it is due to conductivity modulation. Unlike other analyses of this phenomenon, a voltage step is applied to the diode in such a direction as to forward bias it and the behavior of the injected minority carriers are observed. By comparing the resultant current through the diode to the relationship predicted by the equivalent circuit of the diode, an expression is obtained for the simulated inductance. …

The Indole Acetic Acid Oxidase Of Hygrophorus Conicus., Dilip N. Patel

Masters Theses

"The purpose of this investigation was to determine an assay method for measuring the activity of the indole acetic acid oxidase present in Hygrophorus conicus. This enzyme converts tryptamine or indole acetic acid (IAA) into oxindole acetic acid (OIAA).

An assay method for measuring the activity of the enzyme was developed based on the spectrophotometric measurement of tryptamine, IAA, and OIAA. Several other assay methods were tried. The colorimetric method of Gordon and Weber ^(l4) was found to be useful for a quantitative determination of IAA and was insensitive to OIAA. Paper chromatography proved to be useful as a qualitative …

The Effects Of Granular Size On The Thermal Conductivity Of Sand, Kanubhai M. Patel

Masters Theses

"The thermal conductivity of granular materials can be determined by the Thomas method. This method was used here to determine the effects of granular size on the thermal conductivity of sand. A river sand was secured and screened. The sand retained between the Tyler Standard Screen Scale, mesh 10 and 14, 14 and 28, 28 and 40, 40 and 48, 48 and 60, and below mesh 60, was used for tests.

The thermal conductivity for the above six samples obtained by the author coincide fairly well with published data.

It is reported in the International Critical Tables that the thermal …

Optimum Zero-Memory Nonlinear Filter, Benjamin Shaw-Hu Wang

Masters Theses

“The purpose of this report is to review the basic work described by Zadeh insofar as systems of class N₁ are concerned and to apply his general results to a specific problem in which a non-linear filter is mandatory simply because the linear filter is essentially ineffective. The ineffectiveness stems from the fact that the autocorrelation function of the signal plus the noise has essentially the same variational character as the signal alone. Therefore, the transfer function of the linear filter turns out to be simply a constant. Thus, the output of the linear filter is just an attenuated …