Digital Commons Network^™

Gallium Nitride Film Deposition By Ionized Cluster Beam Epitaxy, Ghulum Bakiri

Theses

An experimental Ionized Cluster Beam System similar in design to the one developed at Kyoto University in Japan was. designed and constructed in the Microelectronics Laboratory at NJIT. This involved making the working drawings, having the parts machined and then assembling the system in a vacuum system together with the necessary variable power supplies, meters, controls, gas inlets, cooling water connections, etc.

Eleven deposition runs were then attempted to grow gallium nitride utilizing the system constructed. In a typical deposition run, gallium was vaporized from a boron nitride crucible at 1000° C and allowed to expand through a 0.5 mm …

Managing And Controlling The Manufacturing Operations, Harish Doshi

Theses

No abstract provided.

The Role Of Electrical Noise In Screening Transformers Prone To Failure, Rajeev D. Shirodkar

Theses

Insulation used as a barrier between the high voltage and low voltage windings of a transformer has sites of in- homogeneities like pinholes, cracks or voids, developed during the manufacturing process. Thus, these minute air pockets are stressed much more than the solid dielectric, on the application of a voltage stress, because the dielectric constant of the solid insulation is many times that of the air dielectric. As a result, excitation or ionization takes place in the air (gases). The amount of excited or ionized molecules is proportional to the volume of the inhomogenei- ties within the insulation.

Therefore, experiments …

Automated Instrumentation System For Studies Of Metabolic Rates In Rats, Suhas P. Pathak

Theses

The task of the instrumentation system is to measure the respiratory exchange in rats in a controlled experiment. Air is drawn at a predeter-mined rate in and out of rat chambers. The proportion of oxygen and carbon dioxide in the ensuing air indicates the respiratory rate of the rat. The entire operation is controlled by a microcomputer whose most important functions are: to direct the flow of air through the rat chambers by switching valves; and to collect data about the percentages of gases in question.

Thus with the help of a computer it is possible to monitor and control …

Industrial Parameters For Applying New Technology, Michael Cimino

Theses

Industrial Parameters for Applying New Technology is a paper devoted to the study of the role 'of' robots in today's manufacturing environment. Industry looks forward to robotic technology to solve, its declining productivity dilemma. The purpose of this paper is to' aid a Prospective robot buyer in selecting the appropriate application and in particular a suitable robot for that application. A listing of robot performance characteristics, criteria chart, and evaluation table were developed to guide the engineer through the necessary steps required in selecting a successful robot application.

The history of robotics is discussed briefly along with an explanation of …

Selection And Problems Faced By The Handicapped In An Industry, Hemank Babulal Dharia

Theses

This thesis reports on the problems faced by handicapped workers placed in an industrial situation. It discusses some of the frustrations, aspirations and hopes of the disabled to find suitable work as well as the fears and misconceptions of employers who consider the employment of the handicapped.

There is discussed the work done by the author in designing jigs and fixtures to assist handicapped workers in production as well as the models of placement, job understanding and rehabilitation efforts.

The work was done at the Delaware County Branch of the Pennsylvania Association for the Blind, Chester, Pennsylvania where the author …

A Study Of Personal Conflict And Stress Among Engineering Personnel As Influenced By Corporate Policy, Stated And Unstated, Richard Brian Gordon

Theses

The following concepts are being challenged: That organizations are efficient, well-managed, and intelligent: that if one is to believe in any sort of authority, one must first accept the notion that it truly knows best and that it is not only competent, but well-intentioned; that organizations exist for the benefit of their employees and customers; that organizations reward dedication, competence, and performance: that if the organization is to grow it needs loyal sacrificing people; that organizations are dynamic and receptive to change; that if the employee is discouraged, do not worry, for tomorrow will be better; that to be useful …

The Operational Utility Of The Walton-Mckersie Attitudinal Structuring Model In Collective Bargaining, Donald Warren

Theses

This work is an heuristic inquiry into behavioral change theory designed for application to labor/management interaction in collective bargaining. The theory itself was postulated by Richard E. Walton and Robert B. McKersie in their book A Behavioral Theory Of Labor Negotiations. The principles of their theory are highly axiomatic and their importance and validity can only be recognized through applied empirical analyses that demonstrate or refute its concept.

The aspect of the theory which is the focal point of this research pertains to the structuring and restructuring of attitudes and attendant relationships resulting from the collective bargaining process. The objective …

Interfacial Electrical Properties Of Ion-Beam Sputter Deposited Amorphous Carbon On Silicon, A. Azim Khan, John A. Woollam, Y. Chung, B. Banks

Department of Electrical and Computer Engineering: Faculty Publications

Amorphous, “diamond-like” Carbon films have been deposited on Si substrates, using ion-beam sputtering. The interfacial properties are studied using capacitance and conductance measurements. Data are analyzed using existing theories for interfacial electrical properties. The density of electronic states at the interface, along with corresponding time constants are determined, and the density of interface states is unusually low for an as yet unoptimized

Acuta Enews May 1983, Vol. 12, No. 5

ACUTA Newsletters

In This Issue

GETTING AHEAD IN TELECOMMUNICATIONS

ASSESSING ORGANIZATIONAL EFFECTIVENESS

IMPROVING THE QUALITY OF WORKING LIFE

CONCLUSION

A Master Clock For The Speed School Impulse Clock System Using Wwv Time Information, John E. Pfeifer Jr.

Electronic Theses and Dissertations

Since approximately February of 1979, the Speed School impulse clock system has not functioned due to a worn-out master clock that was never replaced because of a lack of fund. For this thesis project, a solid-state master clock that performs the same functions as the old mechanical master clock was built for less than $200. The new clock features accuracy traceable to the National Bureau of Standards, automatic reset after a power-down and subsequent power-up, and a daylight savings time provision. A decoder that recovers time information broadcast by radio station WWV from Fort Collins, Colorado was built and interfaced …

Broadband Base Isolated Asymetrically Fed Vhf Antenna, Peter Edward Cunningham

Dissertations

Antennas presently being used for vehicular military VHF communications are narrowband. New generation frequency hopping radios, however, require broadband antennas. The antenna must be base isolated in order to reduce undesirable pattern nulls and impedance variations caused by currents induced on the support structure. Physical constraints limit the antenna length to three meters while operating from a frequency of 30 MHz to 88 MHz.

To satisfy the above requirements a model of a broadband, base isolated, cylindrical antenna less than three meters long was analyzed and built. Equations for the current distribution as a function of the physical parameters were …

Acuta Enews April 1983, Vol. 12, No. 4

ACUTA Newsletters

In This Issue

Q&A

BITS & PIECES

ANSWER TO FREQUENTLY ASKED QUESTIONS ABOUT STORE & FORWARD VOICE SYSTEMS

FUNCTIONAL INTEGRATION

WHY DATA TALKS AND VOICE WALKS

H & V News

Building Services Engineering

No abstract provided.

The Development Of A Computer Aided Design Program For Constant Group Delay Monolithic Crystal Filters, Michael A. Robitaille

Retrospective Theses and Dissertations

A computer program, which realizes monolithic crystal filters with constant group delay, is developed. This program analyzes and synthesizes a class of transfer functions developed by J.D. Rhodes called equidistant linear phase transfer functions. Using cascade synthesis, the program calculates the values of the inductor and capacitors of the ladder sections which realizes these functions. The ladder sections are implemented using monolithic crystal filters.

The Photovoltaic Cell: History, Operation, Current Technology, Marc L. Luksetich

Graduate Research Papers

Historically, practical applications of solar cells were of single crystal silicon material (Rauschenbach, 1980). In the mid 1970s, the U.S. Government actively began to subsidize solar cell development and use (Maycock & Stirewalt, 1981). This funding provided a major contribution for expanded research, development, and markets. Consequently, manufacturing and final-product costs have been reduced with a corresponding increase in solar cell efficiency (Merrigan, 1982). The main objective of this study was to analyze literature from photovoltaic cell manufacturers regarding their current production methods, materials, and uses, and to report the findings.

Development Of A Computer-Aided Analysis Package For Linear Elastic Fracture Mechanics, William E. Warkentin

Theses and Dissertations

This thesis develops an interactive computer-aided analysis package for solving linear elastic fracture mechanics problems. CHILES 2 (an existing finite element fracture mechanics program) was modified to be interactive. The modified program is named CHILES.BYU and is used in conjunction with QMESH.BYU and MOVIE.BYU to form the total software package. An analysis of glass ceramics and glass ceramic/metal interfaces was performed demonstrating the capabilities of the package. This study demonstrates the usefulness of an interactive package of computer programs to allow an engineer to rapidly investigate different crack configurations.

Shear Characteristics Of Motor Oils Conforming To The American Petroleum Institute's 1981 Engine Service Classification, D. Joseph Clausen

Graduate Research Papers

The problem was to determine if shear (slipperiness) characteristics differ between various SF motor oils. Oils tested met SAE (Society of Automotive Engineers) lOw-40 viscosity requirements, and API (American Petroleum Institute) engine service classification requirements for 1981 SF quality motor oils.

Four basic types of oil were tested: (a) mineral; (b) synthetic; (c) friction modified; and (d) extended drain. A gravity powered device was designed and used as a testing apparatus to measure force needed to pull a weight across a lubricated surface.

Findings indicated that friction modified oils (Pennzoil P-Z-L and Arcographite) were the most slippery. Other oils tested, …

On The Space Shuttle Wing Thermal-Structural Analysis, Kumar Krishna Tamma

Mechanical & Aerospace Engineering Theses & Dissertations

A finite element approach for efficient thermal-structural analysis of structures with thermal protection systems (TPS) is described. The approach is applied to Space Shuttle wing structure configurations subjected to reentry heating. New two and three-dimensional finite elements are developed to model heat transfer in the TPS and supporting structure. A typical TPS/Structural element predicts transient nonlinear temperature variations through the TPS thickness and detailed structural temperatures at the TPS/Structure interface. The accuracy of the TPS/Structure approach in two and three-dimensions is evaluated by comparisons with the conventional approach for various configurations of the wing structure. The results indicate that the …

Biomass Gasifier Combustor, Frederick A. Payne, Ira J. Ross

Biosystems and Agricultural Engineering Faculty Patents

The present invention is directed to a biomass gasifier combustor which operates by gasification and combustion of the biomass to produce a clean effluent gas which can be used directly for grain drying or other applications where thermal energy is required. This biomass gasifier combustor burns crop residue clean enough so that the combustion gases can be used directly for grain drying without the need for a heat exchanger to isolate the combustion gases from the drying air. The biomass gasifier combustor includes a screw feeder tube having a screw feeder disposed therein. The screw feeder forces the biomass into …

Gasification Of Densified Sludge And Wastepaper In A Downdraft Packed-Bed Gasifier, George Tchobanoglous, Nelson W. Sorbo, Samuel A. Vigil

Civil and Environmental Engineering

The co-disposal of densified sludge and wastepaper in a co-current flow packed bed gasifier represents new application of the thermal gasification process. Advantages of this technology include lower costs than other incineration or pyrolysis technologies, simple construction and operation, and the ability to use a variety of fuels including agricultural wastes and other biomass materials in addition to densified sludge and wastepaper.

Plan Of Study For Cross Florida Barge Canal: Economic Analysis, United States. Army. Corps Of Engineers. Jacksonville District

Correspondence and Textual Material

At the time of the previous study of transportation savings, commerce in coal primarily for electric power generation could not be ·projected with any degree of accuracy because most electric utilities had not developed firm plans for building new coal-fired plants· or for converting from petroleum products or natural gas to coal at existing plants. Today, with plants already constructed that will burn coal, there is a greater probability of defining coal needs. So there is a need to reevaluate potential coal traffic via the CFBC. Also there is a need to evaluate the other types of benefits mentioned under …

Treatment During Transport Of Solid Waste, Wayne M. Fassell

Michigan Tech Patents

The method of treatment during transport of solid waste by depositing the solid waste on the surface of a molten stream of lead traveling in one direction whereby organic material in the waste is subjected to thermal degradation, metals and other materials in the waste which are insoluble in the molten lead and of lesser specific gravity remain on the surface of the molten lead for removal and recovery while metals and other materials which are soluble in the molten lead dissolve in the molten lead for separation from the remainder while metal and materials which are insoluble in the …

Moment Method Solution Of The Time-Dependent Transport Equation To Describe The Scattering Of Gaussian Plane Wave Pulses By A Forest, Nack Yang Cho

Theses

The time dependent transport equation is used to study the transmission of periodic pulses through a forest. The forest is assumed to occupy a half-space region, to be statistically homogeneous and to scatter energy isotropically A periodic sequence of Gaussian plane wave pulses is assumed to enter the forest normally from free space. The transport equation is solved by the moment method using triangular expansion functions. Numerical results indicate the dependence of the incoherent intensity on penetration depth, observation angle, albedo and pulse repetition rate.

Us Army Missile Command Regulation 10-1, Chapter 29, Missile Intelligence Agency, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

The Army Missile Command was the successor to the Army Ballistic Missile Agency at Redstone Arsenal in Huntsville, AL. The Army Ballistic Missile Agency was an organization that developed missiles for the Army and launched the first United States satellite, Explorer 1, on 31 January 1958. It was staffed, in part with Wernher von Braun and his team of scientists and engineers from Germany.

Missile Intelligence Agency was a special-purpose intelligence production organization concerned with missiles and related technology used or being developed by foreign armed forces.

In the Army system, a regulation numbered 10-1 often describes the organization and …

Doctor Of Arts In Information Science A Field-Based Program For Librarians And Information Managers, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Vlsi Multiple Microcomputer Technology Applied To Real-Time Simulators, David M. Kotick

Retrospective Theses and Dissertations

VLSI technology, embodied in state of the art microprocessors and microcomputers, has implied a computer system architecture that offers the possibility for extensive standardization, modularity, and performance improvements that can significantly impact and reduce the lifetime costs of real-time simulators. This report discusses one such system. Both the hardware and software aspects of the system are examined.

The Performance Of The 8089 Integrated I/O Processor In Iapx 86 Microcomputer Systems, Jeffrey A. Lohman

Retrospective Theses and Dissertations

This thesis examines the performance of the Intel 8089 integrated I/O processor through a predictive performance model for the I/O subsystem architectures available to the designer of an iAPX 86 system. The model provides system throughput estimates and is intended to be used prior to any detailed design. The derivation of the model is followed by a description of a prototype system which is used to provide actual throughput measurements. These measurements are compared with the model predictions to evaluate the model error and its utility. The model estimates are then combined with subsystem cost data to gauge the cost-effectiveness …

Design Methodology Of Very Large Scale Integration, Ankush D. Oberai

Retrospective Theses and Dissertations

Very Large Scale Integration (VLSI) deals with systems complexity rather than transistor size or circuit performance. VLSI design methodology is supported by Computer Aided Design (CAD) and Design Automation (DA) tools, which help VLSI designers to implement more complex and guaranteed designs. The increasing growth in VLSI complexity dictates a hierarchical design approach and the need for hardware DA tools.

This paper discusses the generalized Design Procedure for CAD circuit design; the commercial CADs offered by CALMA and the Caesar System, supported by the Berkeley design tools. A complete design of a Content Addressable Memory (CAM) cell, using the Caesar …

Sandstone As A Construction Material Ky 80, Hazard To Watergap, Gary W. Sharpe, Herbert F. Southgate, David L. Allen, James H. Havens, Robert C. Deen

Kentucky Transportation Center Research Report

KY 80 (Hazard to Watergap) was constructed using abundantly available crushed sandstone. The pavements were designed to have adequate load-carrying capibilities and stability but were considered to be experimental (see Figure 1). It was intended that performance would be monitored and that undesirable features and performance would be identified and studied. Such surveillance was discontinued before construction was completed.

Recently, the need has arisen for testing and evaluation of some of the experimental sections. Some spalls, scuffs, and artesian water have been observed. Excessive water has appeared in the shoulder, median, and mainline. There has been at least one spot …