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Doctor Of Arts In Training And Learning 1987-89 Catalog, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctor Of Arts In Information Systems 1987-89 Catalog, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Statistical Analysis Of A Compound Power-Law Model For Repairable Systems, Max Engelhardt, Lee J. Bain

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Conclusions - A compound (mixed) Poisson distribution is sometimes used as an alternative to the Poisson distribution for count data. Such a compound distribution, which has a negative binomial form, occurs when the population consists of Poisson distributed individuals, but with intensities which have a gamma distribution. A similar situation can occur with a repairable system when failure intensities of each system are different. A more general situation is considered where the system failures are distributed according to nonhomogeneous Poisson processes having Power Law intensity functions with gamma distributed intensity parameter. If the failures of each system in a population …

Integrated Detonator Delay Circuits And Firing Console, Lawson J. Tyler, Paul Nicholas Worsey

Mining Engineering Faculty Research & Creative Works

A detonation system for use with supply of electrical energy has user operable firing console for selectably transmitting unit identification information, firing delay time information and selections from a command set including Output, Delay, Fire (Time), Abort, Power Up (Arm), Input, and Store. The console displays responses or information digested from responses by electrical delay detonators to the commands. The detonators have explosive, a capacitor for storing energy from the supply to set off the explosive, circuitry for charging the capacitor from the supply and transferring the energy from the capacitor to the explosive in response to first and second …

Implementation Of A Parallel Ynet Architecture, Julie Nadeau Leblanc

Retrospective Theses and Dissertations

A simulation of an alternate implementation of a redundant busing network based on the Teradata Ynet architecture is presented. An overview of the Teradata DBC/1012 data base parallel processing computer including the Ynet, an active logic busing network, is given. Other multiprocessor busing networks are examined and compared to the standard Ynet and the alternate Ynet.

In the standard Ynet system, two networks, called Ynets, process message packets concurrently. When one of the Ynet paths fails, the system is reset. The remaining Ynet path restarts using the previously interrupted packets and processing continues without the aid of the failed Ynet. …

Experimental Verification Of Laser Speckle Power Spectral Density, Christopher T. Chiles

Retrospective Theses and Dissertations

The dependence of laser speckle power spectral density on the autocorrelation of the aperture pupil function was verified using a charge injection device (CID) camera. Speckle patterns acquired by the CID array were processed to compute the power spectral density (PSD). Three aperture shapes were studied. There was good agreement between the theoretical and experimental power spectral density shapes, and the cutoff frequencies agreed within five percent error.

Applications Of Simulation And Animation In Facilities Planning And Design, William Joseph Mattingly

Retrospective Theses and Dissertations

Recent developments of simulation software have made computer simulation and animation popular system problem-solving techniques. One field that has many potential applications for computer simulation and animation is in the area of facilities planning and design. The purpose of this paper is to provide the facilities planner with information to assist in determining when, why, how and what simulation software should be implemented to solve facilities planning and design problems. Also, the usefulness of simulation and animation to the facilities planner is evaluated and areas for improving software for future application in facilities planning and design are identified. TO assist …

A Rapid Acquisition Technique For Direct Sequence Spread Spectrum Systems By A Pn Phase Multiplexed Correlator, Greg S. Rawlins

Retrospective Theses and Dissertations

With the proliferation of direct sequence spread spectrum (DSSS) systems in the communications arena, synchronization techniques that offer improved performance and higher speed are of great value to the spread spectrum designer and user. Matched filter approaches have gained momentum in recent years due to SAW filter technology, while sliding correlators have experienced slower development. This paper introduces a unique multi-phase correlator intended to decrease the mean time to acquire synchronization by exploiting properties of Gold codes and other pseudo-noise (PN) sequences. These properties are used to create a novel signal structure for the local correlator. A brief explanation of …

Implementing Path Control, English Motion Commands And Off Line Programming On Minimover-5 Robot, Mark S. Chen

Retrospective Theses and Dissertations

According to Alan L. Porter and Frederick A. Rossini (1987), 50,000 robots are expected to be installed by year 2000. This increasing number of robots to be used in industry has lead to the need for skilled robot operators and programmers. However, to train this specific class of personnel using an industrial robot as a training tool can be expensive and dangerous due to the possibility of robot accidents. Therefore, in order to provide a safe, inexpensive, and effective training tool, the use of the Mini-Mover-5 educational robot is proposed. The MiniMover-5 has only a primitive programming capability. A use-friendly …

Analysis Of Flexible Pavement On The Basis Of Deflection Basins, Dinesh M. Kamath

Retrospective Theses and Dissertations

The pavement at research park called Research Parkway and Discovery Drive was found Deteriorated within two years of the construction. The need to evaluate the extent of the damage and the estimate of remaining life of pavement initiate the research study. The analysis presented in this report is based on the measurements of the surface deflections and the layered elastic theory. The life expectancy of the pavement can be estimated by the amount of pavement deflection developed within the pavement system. The parameters used in the analysis are the applied load, material of the pavement components and environmental effects. Trial …

Applications Of Artificial Intelligence In Military Training Simulation, Igor V. Golovcsenko

Retrospective Theses and Dissertations

This report is a survey of Artificial Intelligence (AI) technology contributions to military training. It provides an overview of military training simulation and a review of instructional problems and challenges which can be addressed by AI. The survey includes current as well as potential applications of AI, with particular emphasis on design and system integration issues. Applications include knowledge and skills training in strategic planning and decision making, tactical warfare operations, electronics maintenance and repair, as well as computer-aided design of training systems. The report describes research contributions in the application of AI technology to the training world, and it …

Real Time Signal Processing Using Systolic Arrays, Jack Boulay

Retrospective Theses and Dissertations

This thesis discusses and presents the design of systolic arrays used in modern real time signal processing. A methodology to map a given algorithm into a systolized VLSI implementation is described. The architectural alternatives for a given signal processing algorithm are discussed and investigated at a function level using a simulation package that has been developed using the “C” programming language. The similarities and differences between wavefront array processors and systolic array processors are presented.

Design And Analysis Of A Voice Band Qpsk Modem, John F. Doud

Retrospective Theses and Dissertations

The objective of this paper is to design and construct a modem using the Quadrature Phase Shift Key digital modulation technique. The modem is designed to transmit information over a telephone line at the rate of 1200 bits per second subject to noise and imperfect channel response in the form of magnitude and delay distortion. The device is constructed using CMOS logic to minimize power consumption. To analyze the design with respect to the above constraints, it was necessary to build a pseudorandom bit sequence generator and correlator, a variable magnitude white noise generator and a digital error detector/indicator.

Ada Tools For The Description And Simulation Of Digital Signal Processing Systems, Mark D. Happel

Retrospective Theses and Dissertations

While specialized hardware description languages allow for maximum capability and efficiency in a design automation system, the use of a general purpose language in the same role can make the system more available or more available or more practical for a larger set of users. This project demonstrates the use of ADA* for the description and simulation of small digital signal processing systems. Building on conventions and primitives proposed by Denyer and Renshaw, a simple subsystem was described in ADA and then tested with a small simulator also written in ADA.

* ADA is a trademark of the United States …

Packaging Management Organizations: A Case Study, Stephen A. Raper

Masters Theses

"The role of packaging management is taking on an increasingly crucial role as an aid to the success of companies today. This is a case study on the Functional Packaging Management (FPM) organizations of two companies in different industries. The case study examines the structure of the two functions, and examines their missions, responsibilities, and activities. This information is formulated into a definition of FPM for each company. The definitions are then compared to each other and to a literature theorized definition.

The knowledge gained by this case study illustrates that several factors such as the product/market served, alignment in …

Improving Crystallographic Macromolecular Images: The Real-Space Approach, A. D. Podjarny, T. N. Bhat, Martin Zwick

Complex Systems Faculty Publications and Presentations

Macromolecular crystallographicy is a unique tool for imaging the structures of proteins and nucleic acids. Images are obtained from the Fourier transform of the diffraction pattern of the crystal by use of X-ray, neutron, and / or electron scattering. When X-ray and neutron scattering are used only diffraction amplitudes are experimentally measured, and phases have to be obtained. Multiple isomorphous replacement (MIR) has been the technique of choice for solving this phase problem in the determination of most macromolecular structures. Unfortunately, the method is extremely time consuming, especially when compared with the solution techniques available for small molecules; moreover, structure …

The Effect Of Excess Lead Oxide On The Sintering Characteristics And Dielectric Properties Of Lead Magnesium Niobate Ceramics, Dyllan Jye-Lun Hong

Masters Theses

"The effect of lead oxide additions on sintering characteristics and dielectric properties of ferroelectric Pb₃MgNb₂O₉ based capacitors was studied. The basic dielectric compositions were formed by solid state reaction. Densification was studied as a function of PbO content over the temperature range 900 °C to 1000 °C for sintering times one to six hours depending on the amount of additive, and the sintering temperature.

Weight loss, density and shrinkage measurements of each composition were made in order to relate the effects of the excess PbO additions on the densification. The dielectric and electrical properties were …

Recombination-Current Suppression In Gaas P-N Junctions Grown On Algaas Buffer Layers By Molecular-Beam Epitaxy, D. P. Rancour, M. R. Melloch, R. F. Pierret, Mark S. Lundstrom, M. E. Klausmeier-Brown, C. S. Kyono

Department of Electrical and Computer Engineering Faculty Publications

n+pp+GaAs and n+pP+ GaAs/GaAs/Al0.3Ga0.7As mesa diodes have been fabricated from films grown by molecular‐beam epitaxy. The diodes made from films employing an AlGaAs buffer layer show marked improvements (a factor of 5 reduction) in recombination current densities. Deep level transient spectroscopy measurements moreover indicate that deep level concentrations are reduced by the AlGaAs buffer.

A Status Study And Critical Analysis Of Present And Future Program Goals For Industrial Arts In The State Of Nebraska, Kennard G. Larson

Dissertations and Theses @ UNI

This study was conducted to describe the present status and the desired future of the industrial arts programs in the public schools in the State of Nebraska. Information concerning program goals was obtained from a descriptive survey sample of industrial arts teachers, secondary school principals, school board presidents, and industrial arts teacher educators. Two dimensions were examined: the importance of 23 program goal statements as perceived in the present industrial arts program, and the importance of the same goal statements as perceived for the industrial arts program in the future.

The outcome of the study was a compilation of data …

A Comparison Of Present And Future Tasks Performed By Quality Engineers Of Leading And Nonleading American Manufacturing Firms, Zenon Theodore Smolarek

Dissertations and Theses @ UNI

This study identified and compared the level of importance and frequency of performance of 34 selected quality engineering tasks in the present and five years hence and determined potential catalysts for any expected change between the present and the future. Two sample groups of practicing certified quality engineers working for manufacturing companies in the United States were surveyed in three rounds to obtain the data. Group I consisted of 86 engineers working for companies that had been identified as leaders in product quality in a 1985 Gallup study. Group II consisted of 96 engineers from other companies.

The study attempted …

A Mathematical Model Of A Zinc/Bromine Flow Cell, T. I. Evans, Ralph E. White

Faculty Publications

A mathematical model is presented for a zinc/bromine flow cell. The model includes a thin porous layer on the bromine electrode and a porous separator. The independent parameters of the porous layer are defined, and their effect on cell performance during charge and discharge is investigated. The dependence of the round trip energy efficiency on the thickness of the porous layer and mode of discharge is presented. The predictions of the model show that a maximum round trip energy efficiency of 70% should be possible under the design conditions considered.

A Review Of Mathematical Modeling Of The Zinc/Bromine Flow Cell And Battery, T. I. Evans, Ralph E. White

Faculty Publications

Mathematical models which have been developed to study various aspects of the zinc/bromine cell and stack of cells are reviewed. Development of these macroscopic models begins with a material balance, a transport equation which includes a migration term for charged species in an electric field, and an electrode kinetic expression. Various types of models are discussed: partial differential equation models that can be used to predict current and potential distributions, an algebraic model that includes shunt currents and associated energy losses and can be used to determine the optimum resistivity of an electrolyte, and ordinary differential equation models that can …

Human Health Effects Assays, Ronald C. Sims, J. L. Sims, R. R. Dupont

Biological Engineering Faculty Publications

Health risk assessment of individual environmental chemicals, risks of drinking water supplies, methods for evaluating toxicity, and structure-activity relationships and response-surface methodology represent the focus for 1986. A report of the Steering Committee on Identification of Toxic and Potentially Toxic Chemicals for Consideration by the National Toxicology Pro gram found that, for the majority of substances they examined, data essential for human health hazard assessment were lacking.¹ Milestone publications concerning human health effects aspects include works by Mortelmans et al,² Busch et al,³ Hartman et al,⁴ Rein,⁵ Gentile,⁶ Hodgson,⁷ and Tagashira and Omura. …

Computer-Aided Testing Of Electrical Machines: Software Development, Max Darwin Anderson, Steven A. Hauk, Robert Laramore, Hardy J. Pottinger

Electrical and Computer Engineering Faculty Research & Creative Works

Computer-aided test stations have been developed for research, experimentation, and testing of electric motors and generators. Data acquisition and control of the machines and drives are provided through a computer and its interfaces. Machines are connected to the computer through transducers for data acquisition, and power electronic drives for machine control. General software was written to enable the monitoring of all transducers continuously on the CRT screen while giving the user manual control of the machines and drives. Specialized software was written for automatic control of the induction, dc, and synchronous machines for specific experiments on each type of machine. …

Site Characterization Of Riverfront Park, Kansas City, Missouri, For The Purpose Of Hazardous Waste Site Remediation, Helen Hudson Scannell

Masters Theses

"Riverfront Park, Kansas City, Missouri is located on a point bar along the Missouri River. Portions of the site have historically been used (1950 - 1973) as a municipal landfill receiving residential, commercial and industrial wastes. Relatively high concentrations of elemental lead have been found in small areas of the surface soil within the limits of the Park. Chemicals that may be present in the landfill wastes create a potential for groundwater contamination. A Remedial Investigation, including a series of groundwater monitoring wells is necessary to characterize groundwater geochemistry and flood-induced changes in groundwater flow direction, and to assess any …

A New Approach To Signal Registration With The Emphasis On Variable Time Delay Estimation, Mohamad Namazi, John A. Stuller

Electrical and Computer Engineering Faculty Research & Creative Works

Signal Registration is Concerned with the Problem of Estimating a Varying Displacement between Two Random Processes. We Approach Signal Registration Here as a Recursive Demodulation Problem in Which the Recursion is between Signal Estimations and Displacement Estimation. Special Attention is Given to the Problem of Estimating a Variable Time Delay. Thus, We Present New Algorithms for Estimating D(T) from Received Processes:

r₁(t) = s(t) + n₁(t)

R₂(t) = s(t - D(t)) +n₂(t)

Where s [Formula Omitted] is Signal and n₁ (•) and n₂ (•) Are Noise. Simulation Results Are Presented …

Implementation And Performance Analysis Of Numerical Algorithms On The Mpp, Flex/32, And Cray/2, Raad A. Fatoohi

Electrical & Computer Engineering Theses & Dissertations

This dissertation presents the results of the implementation of a number of numerical algorithms on three parallel/vector computers. The object of this research is to determine how well, or poorly, a number of numerical algorithms would map onto three different architectures and to analyze the performance of these architectures using these algorithms. These algorithms are: a relaxation scheme for the solution of the Cauchy-Riemann equations, an ADI method for the solution of the diffusion equation, and a compact difference scheme for the solution of two-dimensional Navier-Stokes equations. The computers were chosen so as to encompass a variety of architectures. They …

Modeling And Analysis Of Biospecific Adsorption In A Finite Bath, B. H. Arve, Athanasios I. Liapis

Chemical and Biochemical Engineering Faculty Research & Creative Works

A general model is presented and used to predict the dynamic behavior of the adsorption and wash stages of bio specific adsorption (affinity chromatography) in a finite bath. The model accounts for film and diffusional mass transfer resistances as well as for the rates of interaction between adsorbates and ligands. The model is applicable to single and multicomponent bio specific as well as nonspecific adsorption, and the adsorbates may be monovalent or multivalent. The predictions of the model are compared with the experimental data of the adsorption of β‐galactosidase onto immobilized anti‐β‐galactosidase. The results of bio specific adsorption of bivalent …

The Design Of A Resonant Post Waveguide Filter, Ramjee Prasad

Tanzania Journal of Engineering and Technology (TJET)

A seven stage, quarter-wave coupled, single post, resonant cavity type waveguide filter has been studied. The posts are placed according to the Tchebyscheff distribution. The filter is designed and fabricated to meet the following specifications: Centre frequency: 9.31 GHz, Number of stages = 7, 3-dB bandwidth = 300 Mhz, Ripple tolerance in the passband = 0.5 dB. The frequency behaviour of this filter has been experimentally studied and is in close agreement with the specifications.

Gain Margin And Phase Margin Interrelationships, M Luhanga

Tanzania Journal of Engineering and Technology (TJET)

The gain margin and the phase margin Of a control SY Stem are important parameters in the determination of the relative stability of control system. In this paper We derive general interrelationships between these parameters.