Engineering Commons^™

Statistical Analysis Of Breakdown In Transformer Oil., J. Derald Morgan, M. A. Abdellah, Frank Ferracane

Electrical and Computer Engineering Faculty Research & Creative Works

The statistics of breakdown for transformer oil in a uniform field gap is an important design consideration. The theoretical probability distribution which closely fits the experimental data under 60 Hz ac voltage, positive and negative lightning impulses and positive and negative switching surges is evaluated and a statistical distribution is suggested.

On The Relation Between Triangular Matrix Decomposition And Linear Interpolation, John A. Stuller

Electrical and Computer Engineering Faculty Research & Creative Works

The December 1983 Letter by C. W. Therrien Concerning the Relation between Triangular Matrix Decomposition and Linear Prediction is Extended to Include Linear Interpolation. © 1984 IEEE

Nebraska Summary S020: Zetor 12145, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary S113: Agco Allis 7650, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary S018: Zetor 10145, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Test 1538: Massey-Ferguson 670 Diesel And Massy-Ferguson 270 Multipower Diesel 12-Speeds, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE

General

Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure.

The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Test 1536: Ford Tw-15 Fwd Diesel Also Ford 8630 Diesel 16-Speeds, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE

General

Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure.

The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Electronic Ballast Having Emitter Coupled Transistors And Bias Circuit Between Secondary Winding And The Emitters, Don Cronin

Mechanical and Aerospace Engineering Faculty Research & Creative Works

An electronic ballast for energizing fluorescent lamps comprising a converter including a rectifier and a filter for converting an alternating source voltage into a direct current voltage, a network including first and second switching transistors, a tank circuit having a primary winding of a transformer, a secondary winding of the transformer for providing feedback of a portion of the voltage developed across the tank circuits and a bias circuit coupled between the opposite ends of the secondary winding and the emitters of the transistor for alternatively applying bias to the transistors, the network serving to convert a direct current voltage …

A Numerical Solution For Three Dimensional Beam Columns In The Elastic Region, Hamid Reza Afghan

Dissertations and Theses

The three differential equations describing the behavior of the beam columns in three dimensions are derived and presented in finite difference form. A computer model is developed to solve the simultaneous equations in the elastic regions and predict the member behavior.

The computer program is checked by comparing the results obtained from the program with data from other investigators, and classical analytical techniques.

A Comparison Of Two Techniques For Estimating The Travel Time Of An Acoustic Wavefront Between Two Receiving Sensors, Frank J. Montalbano

Retrospective Theses and Dissertations

In recent years the United States Navy has concentrated most of its Anti-Submarine Warfare (ASW) research and development efforts toward passive sonar. Its ability to locate enemy targets without being detected gives the passive sonar system a supreme strategic advantage over its active counterpart. One aspect of passive sonar signal processing is the time delay estimation of an underwater acoustic wavefront. From this estimation the location and velocity of the radiating source (target) can then be determined. This report compares two popular methods of estimating time delay utilizing computer simulations of each: the cross correlator and the beamformer.

Awqpsk : An Optimum Modulation Technique For Spread Spectrum Communication, Madjid A. Belkerdid

Retrospective Theses and Dissertations

Quadrature phase shift keying (QPSK) and minimum shift keying (MSK) are the two most used M-ary modulation techniques in Direct-Sequence (DS) Spread Spectrum Communication systems. This thesis introduces a new modulation technique that can compete well with QPSK and MSK in many applications. This new modulation technique, made up of a superposition of one QPSK signal and two amplitude weighted QPSK signals, is called Amplitude Weighted Quadrature Phase Shift Keying (AWQPSK). It is found to have the same probability of error as QPSK and MSK techniques. It has a higher bandwidth efficiency in bits/sec/Hz than QPSK and MSK. It has …

The Use Of Foamed Asphalt In Bituminous Stabilization Of Base And Sub-Base Materials And Recycled Pavement Layers, Leonard E. Wood, A. G. Altschaeffl, Christine Marie Beaudoin, Franco Luis Castedo

JTRP Technical Reports

No abstract provided.

Development Of A Method For Establishing Resurfacing Priorities For The Pavement Management In Indiana: Volume 1, Executive Summary, Benjamin Colucci-Rios, Kumares C. Sinha, Eldon J. Yoder

JTRP Technical Reports

No abstract provided.

Development Of A Method For Establishing Resurfacing Priorities For The Pavement Management In Indiana: Volume 2, Study Procedures And Results, Benjamin Colucci-Rios, Kumares C. Sinha, Eldon J. Yoder

JTRP Technical Reports

No abstract provided.

Energy Conservation And Cost Savings Related To Highway Routine Maintenance : Pavement Maintenance Cost Analysis: Interim Report, Essam Abdel-Aziz Sharaf, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

Slope Stability Analysis With Stabl4, C. W. Lovell, Sunil Sharma, James Richard Carpenter

JTRP Technical Reports

No abstract provided.

Extension Of Darby's Model Of A Hydrophylic Gas Fed Porous Electrode, Ralph E. White, M. A. Nicholson, L. G. Kleine, J. Van Zee, R. Darby

Faculty Publications

A model presented previously by one of the authors (1,2) is reviewed and extended. Aspects of this model which were not previously available in the open literature are considered, and the model is extended to include previously neglected terms in the governing differential equations, fractional reaction orders in the current density-overpotential expression, and mass-transfer coefficients to account for mass-transfer resistance of the reactants to the faces of the porous electrode. The model is used to predict quantities of interest for oxygen reduction in an acidic aqueous solution in a porous carbon electrode.

Adaption And Optimization Of The Ibrahim Time Domain (Itd) Modal Parameter Identification Algorithm For Mini-Computer Use, Mary T. Cogeos

Retrospective Theses and Dissertations

Conventional modal analysis is performed using FFT Analyzers with modal analysis software developed by one of many test/analysis software vendors. The analysis is performed in the frequency domain using frequency response functions. A recent advancement in modal analysis involves analyzing the measured free response of a structure in the time domain. The Ibrahim Time Domain (ITD) Algorithm is such a method which has been used and verified at government environmental test facilities. The ITD is an accurate numeric solution. Minimal operator interaction is required for proper performance of the algorithm. The results of the ITD Algorithm are far superior to …

A Gate-Array Realization Of An Algorithm For Division, Salman Y. Abbasi

Retrospective Theses and Dissertations

A realization of a division algorithm suitable for high speed pipeline and realtime processors is presented. Implementation of the divide algorithm can be achieved by utilizing LSI / VLSI gate array technology. The divider performs precision, high speed 9 bit sign magnitude division. The design consist of combinational logic, where input and output data are latched into input and output registers. Data propagates through 16 divide stages. The n'th stage generates the n'th quotient bit upon receiving the updated dividend and controls from the previous stage. A simulation program is developed to verify the algorithm, and an analysis for speed …

Digital Image Processing Using Ntec Facilities, James F. Roesch

Retrospective Theses and Dissertations

Digital image enhancement refers to the improvement of a given image for human interpretation. Digital image processing facilities are those in which hardware and software computing elements are combined in such a way as to enable the processing of digital images. This report describes the use of the Naval Training Equipment Center (NTEC) Computer Systems Laboratory computing facilities to enhance digital images. Described are two major hardware systems, the IKONAS RDS-3000 raster display graphics system and the VAX-11/780, and the digital image processing program (DIMPRP) written by the author. Digital image enhancement theory and practice are addressed through a discussion …

Development And Use Of A Management Information System To Identify Areas Of Routine Maintenance Productivity Improvement : Interim Report, V. Alan Sanderson, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.

Highway Runoff And Sediment Control, Susanna H. Rehmann-Koo

Retrospective Theses and Dissertations

A literature survey was conducted on the erosion and sedimentation process and techniques for control. Erosion and sediment control techniques were found to be very site specific. Several techniques are analyzed for their maintenance and operation requirements, construction costs, and effectiveness in quantity and quality control. Once technique, namely swale blocks or berms was designed and constructed to illustrate cost and effectiveness. Design aids were developed for various berm heights and highway slopes as a function of berm spacing for typical highway cross-sections to aid in the design of swale blocks. Construction costs were estimated for the berms and retention/detention …

A Comparative Study Of Computer Interfacing Techniques For Military Training Devices, Gary R. Fraas

Retrospective Theses and Dissertations

This report surveys many of the interfacing techniques currently in use on emerging military training devices. The primary focus of this report is associated with the hardware aspects of computer interfacing. After a brief introduction into the various aspects of military training devices, this study presents various computer related interfacing techniques used on military training devices. Topics addressed in the study include custom designed interfaces, commercial packages, serial communications with an emphasis on RS-232, -422, -423, and -449 serial standards as well as local area networks. Then, a number of bus standards are presented and finally, interface products pertaining to …

Filter Settle Time For Signal Processing Applications, Michael T. Mccord

Retrospective Theses and Dissertations

In this paper, the step modulated sine wave [u(t)Asin2πft] response of the low-pass, band-pass, and high-pass filters are evaluated. Butterworth filters from the first order on up to the ideal filter are analyzed, and expressions for the settle times developed. The longest settle time occurs for the ideal filter, with all other filters taking progressively less time to settle as the order decreases. A significant point is that the transient settle time for a filter depends on the difference in applied signal frequency and the filter cut off frequency. The set of expressions developed in this report are primarily intended …

A Model For Scattering In Dense Clouds, Richard A. Leblanc

Retrospective Theses and Dissertations

Lights is almost always detected by its interaction with matter. One of these interaction phenomena is the scattering of light by small particles. A model is developed that estimates the amount of energy that is scattered towards a detector from a beam given the locations of the source, detector and particle. This collection of particles is allowed to be very dense so that a photon scattered from the beam can be scattered several times before leaving the scattering medium. By considering the single-scatter component and multiple-scatter component separately, the model retains the characteristics of both types.

A Robotic Vision System, Murat Draman

Retrospective Theses and Dissertations

A survey was done to summarize the state of the art and the future directions in the robotic vision field, in the industrial applications and research areas. An assembly language program, "GETIT", was written to control a MC6800 microprocessor in gathering data from an analog-to-digital converter hooked up to a camera, to find the center of a white marble placed on a black surface, and to send the coordinates to a five axis robot. A VAL language program, "VISION!", was written to receive the coordinate data from the microprocessor and to direct the robot to the specified location, to pick …

An Application Of Speech Synthesis, Edward J. Purvis

Retrospective Theses and Dissertations

This paper discusses the implementation of a synthesized computer voice facility for a missile trainer. The actual facility hardware is described. Software used to control the hardware operation is presented and discussed.

A Single Fault-Tolerant Dual Channel Controller, Thomas J. Lowery

Retrospective Theses and Dissertations

The advent of the VLSI technology makes it feasible to offer a once expensive system attribute called fault-tolerance to a wide variety of applications. This can be accomplished by using off-the-shelf single board computers and peripherals as the heart of the system. Custom design boards can then be added to meet the specific requirements of each application.

Graphic Display Of Geographic Spatial Data, Jill G. Ashby

Retrospective Theses and Dissertations

This project developed computer graphics to display spatial and statistical data in a functional, appropriate and articulate manner. The spatial data creates mapping of Orange County focusing on traffic zones. The graphs display statistical data projecting from spatial areas presented in a simple form. The graphs produced by the system are geared towards an audience involved with transportation and planning decisions for Orange County. The graphics employ population, income, number of dwelling units, trip generation and trip production data based upon the 1980 census. The population, income, and number of dwelling unites statistics include predictions for 1985 through 2005 in …

Finite Impulse Response Filter Implementation Via Windowing Technique, Thomas J. Horrigan

Retrospective Theses and Dissertations

This research report is devoted to an investigation of finite impulse response (FIR) filters and their implementation via windowing techniques. Analysis is restricted to those FIR filters that possess both a nonrecursive structure and a linear phase response. Initially an informative yet concise overview of FIR filters is presented. Some knowledge of "discrete – time" systems is assumed. Next, the concepts associated with FIR filter implementation through the utilization of window functions is developed. Analysis is performed in both the time and frequency domains. Results obtained define optimal window function criteria. The last design technique is devoted to computer aided …