Digital Commons Network^™

Frequency Division Using Cascaded Phase-Locked Loops, Curtis B. Abshier

Masters Theses

"In many practical communication systems it is necessary to generate phase coherent subharmonics of an input tone. A useful system for accomplishing this task is a system of phase-locked loops in cascade. It is shown that when the feed-forward function is matched, the phase error of the second loop is zero. Analytical analysis and computer simulation prove that the minimum time to achieve phase-lock is obtained when the feed-forward function is matched. Under this condition, necessary design parameters are determined with ease"--Abstract, page i.

A Time And Frequency Domain Approach To The Optimization Of Linear Multivariable Regulators, Eugene Charles Machacek

Masters Theses

"Optimal design and analysis of a multivariable regulator may be achieved in either the frequency or time domain. This paper describes the formulation of the matrix Riccati equation in the time domain and the Wiener-Hopf equation and the root-square-locus in the frequency domain. The necessary requirements which must be satisfied in order to achieve an optimal control vector when using a quadratic performance index are presented for both domains. The resultant optimal control vector is shown to be a linear function of the system state vector. The effect of the quadratic performance index weighting matrices on the optimal system closed-loop …

Ground Water Of The Uncompahgre Valley Montrose County, Colorado, Ted William Craig

Masters Theses

"Data from water quality tests of 50 wells and from general well information of 309 wells registered with the Colorado Division of Water Resources are presented for the area of Montrose County, Colorado, drained by the Uncompahgre River. This information, along with other pertinent information such as water laws and costs, is evaluated to determine the feasibility of increasing the use of ground water in the area. The drainage basin of the Uncompahgre River within the Montrose area bas three main geologic structures: the Uncompahgre uplift, the Montrose syncline, and the Gunnison uplift. All formations exposed in the area are …

A Closed Form Method For Predicting The History Of Circular Orbit Altitude Decay Of A Near-Earth Satellite Including The Effect Of A Dynamic Atmosphere, John Copley Buchholtz

Masters Theses

"A closed form expression for the time to decay between two circular orbit altitudes is developed. The long-term dynamic variation of high altitude atmospheric density is included. The density is approximated as a ratio of two quadratics with the numerator being a function of the time-related exospheric temperature and the denominator being a function of altitude. The 11-year cyclic variation of exospheric temperature is then represented as a piecewise linear function of time. The analytic expression for circular orbit altitude decay rate is developed by describing the energy loss due to atmospheric drag. A point mass representation of the Earth's …

An Investigation Of Stress In The Monowall Construction System Subjected To Racking Loads, Louis Alex Kuhlmann

Masters Theses

"Several methods of analysis were employed to investigate the stress conditions of concrete block built in the MONOWALL Construction System, when subjected to racking loads. MONOWALL is a technique of assembling blocks with adhesive rather than conventional portland cement mortar. The analyses used in this study included strain gages on full-scale walls, photoelastic models, and a mathematical solution. Each method of analysis is reported separately in detail and the results compared to each other"--Abstract, page ii.

Laminar Heat Transfer For Small Prandtl Number Fluids Including Step Change In Wall Temperature, Shiny Ting

Masters Theses

"The object of this investigation is to provide a simple means of determining the heat transfer from a flat plate which has an unheated leading length x₀. The case of steady, two-dimensional, laminar flow of an incompressible fluid with a Prandtl number of less than one is considered. Since there exists an unheated length and the Prandtl number of the fluid is less than one, the thermal boundary layer intersects the flow boundary layer. Thus, the solution of the problem divides into two regions. In this study, the problem is solved analytically by employing the energy integral equation. The temperature …

An Empirical Method Of Correlating Compressibility Factors Of Nitrogen - Helium - Hydrocarbon Systems, Terry Wayne Buck

Masters Theses

"Compressibility factors have been taken from previous works by Davis and Taneja for twelve different common oil-field hydrocarbon mixtures which contain at least 2 mole % nitrogen. An effort has been made to show that by using the Benedict-Webb-Rubin Equation of State it is possible to predict compressibility factors using a correlation of error in predicted compressibility factor versus reduced pressure, at different mole % of nitrogen with constant reduced temperatures, if the critical points of the mixtures are known or can be calculated. In the mixtures which contain helium, the only effect of helium seems to be the raising …

Dolomitized Pahasapa Limestone (Mississippian), Northeastern Sector Of The Black Hills, South Dakota, Petrography And Geological Setting, Abdullatif Najjar

Masters Theses

"The carbonates of the Mississippian Pahasapa Limestone in the northeastern sector of the Black Hills outcrops were examined in order to ascertain specific characters of the lithology in this area where the formation is predominantly a dolomite in contrast to adjacent areas where it is mainly a limestone. The Pahasapa seems to be uniform in thickness at the study areas and maintains a thickness of about 550 feet. Because of poor exposures, usually at the base or top, complete sections could not be measured. Much of the Pahasapa consists of coarsely crystalline dolomite containing varying proportions of crinoid plates, gastropods, …

Stuttering Tremor; An Exploration Of Methodologies For Recording And Analysis, James J. Welsh

Masters Theses

No abstract provided.

The Application And Refinement Of Thin Layer Chromatographic Procedures In Analyzing The Ribonucleic Acids Present During The Morphological Development Of Two Varieties Of Avena Sativa L., Dorothy Anne Hackett

Masters Theses

No abstract provided.

Cobalt(Iii) Complexes With 1,2-Propanediaminediacetic Acid, Paul John Magnell

Masters Theses

Introduction

Aminocarboxylic acid cobalt(III) complexes have been of interest to inorganic chemists since 1909 when Ley and Winkler isolated violet and rose colored geometric isomers of tris amino acid complexes of glycine and alanine.¹ More recently, considerable interest has been shown in the study of the stereochemistry and optical activity arising from configurational and vicinal interactions of these complexes. Nuclear magnetic resonance of the methylene protons on the carboxylate portion of the coordinated ligand has also been studied.

Of immediate interest to this study is the stereo-chemistry of complexes containing flexible tetradentate ligands. A tetradentate ligand may be constructed …

Synthesis And Structure Proof Of Cis-6,6-Dichloro-2-Diphenylmethylene- Bicyclo [3.2.0] Hept-3-Ene-7-One And Cis-2,2- Dichloro- 1,2,2a,7a-Tetrahydro- 7-Diphenylmethylene-Cyclobut (A) Inden-1-0ne, William Douglas Barta

Masters Theses

Introduction

The purpose of this research endeavor was to determine the structures of the adducts of dichloroketene with diphenylfulvene and benzodiphenylfulvene. Structure elucidation was attempted by chemical degradation and nmr analysis.

The structures of the adducts of dichloroketene with cyclopentadiene^1,2 and indene^3,4 have been determined by previous workers. The influence of the exocyclic double bond on the mode of cycloaddition is unknown.

An Evaluation Of Student Attitudes In The Audio-Tutorial Biological Science Program At Western Michigan University And How They Are Reflected In Student Achievement Versus Time Spent In Laboratory, Dorothy Anne Hackett

Masters Theses

No abstract provided.

The Reaction Of Ethylenediamine With Tetradentate Cobalt(Iii) Complexes, Laura H. C. Huang

Masters Theses

No abstract provided.

Basic Instrumentation Of A Three-Zone Convection Coater Dryer For Calculation Of Heat And Mass Balances, Byron H. Mckinstry

Masters Theses

No abstract provided.

The Utility Of Social Psychological Variables As Predictors Of Educational Aspirations, Robert W. Bilby

Masters Theses

No abstract provided.

The Development Of A New Organizational Pattern For An Elementary School In The Fruitport School District, John W. Carlson

Masters Theses

The development of an educational program that will meet the needs of all pupils is a goal that is sought by all educators. The needs of individual pupils will be met if such a goal is ever realized. Such a program, by appreciating the fact that each individual has a different rate and aptitude for learning, should help children of all ages and abilities achieve their full potential.

This case study follows the establishment of a nongraded flexibly scheduled, team taught elementary school from inception of the initial concept through the first year of operation. While it was impossible to …

Small Angle Elastic Scattering Of 1.33 Mev Photons From Lead, Chwan-Kang Chiang

Masters Theses

No abstract provided.

The Design, Construction, And Application Of A Multibeam Fiber Optics Photometric Titrator, Marlin George Bensinger

Masters Theses

No abstract provided.

Elastic Scattering Of 1.33 Mev Gamma Rays From Uranium, Joan Sue De Vries

Masters Theses

No abstract provided.

A Direct Measurement Of The Ratio Of The Reaction Cross Sections For Two-Photon And Three-Photon Annihilation Of A Positron And An Electron In Aluminum, Jeffrey Ira Siegel

Masters Theses

No abstract provided.

A Study Of Defects In Platinum Using Positron Annihilation, Clarence D. Esseltine

Masters Theses

No abstract provided.

The Stepwise Nature Of The Unwrapping And Transfer Of Ethylenediaminediacetate From Nickel(Ii) To Copper(Ii), Robert Swann

Masters Theses

No abstract provided.

The Dipole Moment Of Cis- And Trans- Chloroiodoethylene, Ashvin Gajendralal Gajjar

Masters Theses

No abstract provided.

The General Linear Group Related Groups, J. William Beck

Masters Theses

No abstract provided.

Student Parent Handbook - Westfield Schools, Vergil Gregg

Masters Theses

No abstract provided.

A Study Of The Composite Action Of Light Gage Steel Deck And Concrete, Charles Sherman Bach Jr.

Masters Theses

"This thesis is on the investigation of corrugated light-gage steel sheets used as the tension reinforcement for concrete slabs. The steel sheets used had embossments placed at uniform intervals over the entire length of the sheets. The composite concrete and light-gage deck steel were tested to determine a method of design for this type of composite section from an economical, safe and practical standpoint. The investigation covered the flexural, shear and bond capacity of this type of composite section"--Abstract, page ii.

Mutually Dependent Heat And Mass Transfer In Laminar Tube Flow, Gary Alfred Scheffel

Masters Theses

"An investigation is performed of the mutually dependent heat and mass transfer in laminar and hydrodynamically fully developed gas flow in a tube. Sublimation of mass occurs at the tube wall so that heat and mass transfer take place between the wall and the flowing gas stream. The wall of the tube is thermally insulated from the external environment with the result that the heat of sublimation is supplied by convective transport from the gas. The solution of this problem requires the simultaneous consideration of the energy and diffusion equations, with coupling provided by the boundary conditions. Mathematical expressions are …

A Proposed Concept For The Rapid Field Design Of Protective Structures, John Ross Childress

Masters Theses

"This investigation proposes a simplified concept for the rapid field design of protective structures, subject to attack by conventional artillery rounds, mortar rounds and small rockets. Parameters which should be considered during a rigorous design process are discussed. The number and complexity of these parameters make the rigorous design procedure too unwieldy to be efficiently used, in a limited time period, when materials are not available to comply with Standard Designs. Since the duration of an explosion pulse is very short and uncompacted soil is capable of absorbing explosive energy, this study investigates the theory that adequate protection can be …

A Permeability Scaling Technique In The Numerical Simulation Of Water Coning, Virendra Kumar Dutta

Masters Theses

"A two-dimensional, two-phase, radial, horizontally layered water coning simulator was programmed for large memory digital computers. A permeability sealing technique is developed which allows the use of large size blocks as production blocks. As a result of this technique large time steps have been used without causing saturation instabilities around the well bore and the permeability scaling technique allows a more realistic simulation of a water cone. The IMPES method is used to calculate pressure and saturation in the system for each finite time step. The behaviour of the simulator is studied for various factors affecting the advance of a …