Digital Commons Network^™

The Effects Of Artificial Destratification On Water Quality In Hyrum Reservoir, John W. Gill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Hyrum Reservoir, Utah, was studied for one year during an artificial destratification project. Previously Drury et al. (1975) had studied Hyrum Reservoir for one year of stratified and one year of destratified conditions. The redistribution of dissolved oxygen to the hypolimnion significantly changed conditions for chemical and biological activities in the lower depths of the reservoir. The Aphanizomenon bloom increased with each year of destratification. The reservoir was changed by destratification so as to be suitable habitat for trout on a year round basis. Aerobic conditions prevented iron from being released from the sediment into the aqueous phase. In summary …

A Liquefaction Potential Map For Cache Valley, Utah, Randall Jones Hill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The identification of liquefaction susceptible soil deposits in Cache Valley, Utah and the relative potential that these deposits have for liquefaction were the two main purposes of this study. A liquefaction susceptibility map was developed to outline areas where liquefaction might occur during an earthquake. The susceptibility map was combined with a liquefaction opportunity map to produce a liquefaction potential map for Cache Valley, Utah. The opportunity map for Cache Valley was developed in a companion study, Greenwood (1978).

The development of the susceptibility map and the opportunity map and combining them to form a liquefaction potential map for Cache …

Problem Identification For Highway Safety Plan, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

To comply with Section 402, Title 23 of the United States Code, each state is required to prepare a annual highway safety program. Kentucky's program, which includes identification, programming, budgeting, and evaluation of highway safety projects, is intended to have a positive impact on the reduction of traffic accidents. The first step in the program, problem identification, requires systematic, statistical analyses of accident records. In-depth analyses of accident data were performed, and 25 problem areas were investigated. Accident rates were found for counties and cities in the following categories: total accidents, fatal accidents, accidents by driver age and sex, and …

Evaluation Of A Welded Wire Retaining Wall, Jerold Albert Bishop

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to evaluate the performance of a Welded Wire Retaining Wall and present design recommendations for its future use. Field data from the instrumentation of a Welded Wire Retaining Wall as well as laboratory data from a study of welded wire fabric as a reinforcing agent for soil was gathered. A study of the theory and practice of reinforced soil construction was made. On the basis of this study and the experimental data obtained, the wall is evaluated and design recommendations presented.

Block Floating Point Fft Statistical Noise Analysis Programs, Thomas Joseph Kolze

Electrical and Computer Engineering Technical Reports

The subroutines and programs used to perform a statistical noise analysis of the Block Floating Point FFT (BFPFFT) are briefly outlined and their listings are presented. Explanation of the required input parameters and the resulting output should make the program easy to use.

Support routines and techniques, including a useful plot subroutine, are also described.

Wood Finishing For Tree Samples Of Five Honduran Species, Amilcar A. Cruz

Graduate Research Papers

This research report will study the application of four wood finishing techniques to samples of each of five species of Honduran hardwood.

These four wood finishing methods are: The varnish-method, the lacquer method, the antiquing method and the oil-rub method. The researcher will attempt to determine which is the best method for each of the five species.

A Solar Water Heater For Honduran People, Manuel De Jesus Umana Guerrero

Graduate Research Papers

The purpose of this study is twofold:

1. To help Honduran people by giving them basic ideas about how they can reduce their expenses using solar energy in the water heating process.

2 . To assist the Technical Educational Department at the Escula Superior Profesorado ''Francisco Moraran, " in Honduras, in identifying contents associated with Energy Sources.

Deep Penetration Of Electrons Into Homogeneous Media By The Method Of Condensed Collisions, Joseph Francis Janni

Chemical and Biological Engineering ETDs

The objective of this dissertation was to develop an accurate and efficient alternative to presently available methods of calculating the steady state penetration of electrons deep into homogeneous materials. A thorough solution must include scalar fluxes, net currents, angular distributions, and differential energy spectra. This research has successfully developed the method of condensed collisions, which provides an alternative to methods now in use for the solution of the electron transport problem. The condensed collsion method is general, but has been applied specifically to deep penetration electron transport to demonstrate its utility. The present aplication was for electrons having incident energies …

Development Of High-Pressure Liquid Chromatography Techniques For The Analysis Of Wastewater Effluent, Glenn Douglas Pierce

Civil Engineering ETDs

This investigation characterized a biological secondary wastewater effluent by conventional wastewater analysis parameters, evaluated the capabilities of activated carbon and macroreticular resin for recover­ing residual organics from the effluent, correlated conventional para­meters with carbon recoveries, developed high-pressure liquid chroma­tographic techniques for separation of organics in the recovered mixtures and identified a selected extract fraction. The Organics-Carbon Adsorbable Standard Method was adapted for use with a low turbidity effluent and a mass balance based on non-volatile total organic carbon was developed, demonstrating that the sorptive capacity of the system was not exceeded by a 60-1 sample. Ten individual carbon chloroform extracts …

A Tv-Calculator Teaching Aid System, Robert A. Pezzano

Electrical and Computer Engineering ETDs

A system is described in which calculations performed on an electronic calculator are displayed as an algebraic expression on a television or video monitor. A video module generates the timing signal for the video monitor and allows 16 lines of 16 characters to be displayed. The calculator module provides interfacing between the keyboard and display of a TI-59 calculator and the system. A computer module, containing a Z-80 microprocessor, interprets the calculator signals, simulates the calculator logic, and provides the video module with the information to be displayed.

Classical Modeling Of A Phosphate Molecule (Including 3-D Computer Graphics Display), Ronald A. Tafoya

Electrical and Computer Engineering ETDs

An investigation is made of the classical force terms necessary to model adequately the structure and interatomic forces of the phosphate molecule. The two principal considerations chosen for use in judging the performance of models were:

1. Agreement with empirical spectral data on normal mode vibrational frequencies

2. Agreement with other known physical characteristics of the phosphate molecule

The performance of all models was good. Agreement with normal mode frequencies and phosphorus-oxygen bond lengths ranged from an RMS error of 5.4% in Model one to an RMS error of 1.5% in Model Five. An examination was made of six different …

A Numerical Investigation Of Nonlinear Resistance In Second-Order Autonomous Dynamic Networks, John Jerome Bornholdt

Electrical and Computer Engineering ETDs

Most approaches to the analysis of autonomous nonlinear networks fall under one or more of three categories: topological techniques, stability analysis, and approximate methods. The first method is universal, linear or nonlinear. The application of computer techniques has given strong emphasis to the latter. Approximate methods can give results on estimations of how net­work components affect stability.

This paper is an investigation of the stability of nonlinear resistance in autonomous dynamic networks through approximate methods.

A system that is both unforced and time-invariant is called autonomous. Linear autonomous networks lend themselves to general analytic solutions. With nonlinear autonomous networks, however, …

The Effect Of Earth Media On Seismic Motion And Structure Response, Joseph John Fedock

Civil Engineering ETDs

An analysis is performed to determine the influence of the choice of a constitutive model for the earth medium upon the response of a rigid structure to seismic waves. A finite element method is employed to analyze the motions of an embedded structure in which the surrounding earth medium is represented by three different constitutive models. Linear elastic, linear viscoelastic, and elastic-plastic models of soil behavior are utilized in one- and two-dimensional analyses. The seismic disturbance is characterized by a pressure wave for the one-dimensional case while a system of horizontally propagating Rayleigh waves is used in the two-dimensional analysis. …

Test 1306: Deutz Dx-110 Diesel 15-Speed, 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 1305: Deutz Dx-90 Diesel 15-Speed, 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 …

Mass Transfer At The Edge Of A Rotating Disk, Jeffrey Malcolm Cohen

Chemical and Biological Engineering ETDs

A different approach to the problem of mass transfer to a rotating disk, employing less restrictive assumptions, has been undertaken to quantify the phenomenon of mass transfer at the disk's edge. Experimental work in support of theor­etical conjectures was performed as part of this work.

In order to include the effect of mass transfer at the edge on mass transfer to the entire disk, the equation of convective diffusion was solved in two dimensions over a region that extended beyond physical projection of active area of the disk. A synthesis of experimental results and theoret­ical considerations was used to specify …

Test 1304: Case 2090 Manual Diesel 8-Speed, 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 1303: Case 2590 Powershift Diesel 12-Speed, 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 …

Radio Frequency Sputtering Deposition And Characterization Of Thin Ferroelectric Titanate Film On Silicon Substrates, Cheng-Cheng Hu

Electrical and Computer Engineering ETDs

This work was done to achieve two goals: (1) To investigate and document the optimum deposition conditions for thin ferroelectric BaTi03 film on doped silicon substrates by r.f. sputtering; (2) to characterize the electrical properties of the metal-insulator-semiconductor (MIS) structure with BaTi03 as insulator and the memory characteristics involved.

Test 1302: Case 2390 Powershift Diesel 12-Speed, 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 …

Plastic Analysis And Tests For Rigid High-Rise Composite Frames, J. Hartley Daniels, Dirk P. Duplessis, Thomas Wenk

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

Cpacs Happenings (April 1979 Newsletter), College Of Public Affairs And Community Service, University Of Nebraska At Omaha

CPACS Newsletters

The College of Public Affairs and Community Service (CPACS) newsletter that reported on the news, collaborations, events, and general happenings of the UNO College of Public Affairs and Community Service. This newsletter has had many names and variations over the years including SPACS Newsletter (1973); Newsletter of the College of Public Affairs and Community Service (1973-1974): Happenings (1974-1980s); and the current e-newsletter titled the CPACS Collective (2021-)

Ole Miss Engineer 1979

Ole Miss Engineer

No abstract provided.

Coupling Efficiency And Alignment Sensitivity Of Single Mode Optical Fibers, James Mathew Martin

Retrospective Theses and Dissertations

Coupling efficiency an alignment sensitivity models for the coupling of light from a fundamental mode Gaussian light beam into a single mode optical fiber are given. Experimental results are presented which verify the coupling and misalignment predictions of the models. Data were taken at two wavelengths: 0.6328 and 0.8460 micrometers. The light sources were a HeNe laser and a GaAlAs laser respectively. Coupling efficiencies were measured versus beam spot size; and lateral, axial and angular misalignments of the beam and fiber axes.

Optimization Of Stormwater Management Practices And Processes, Mark Michael Calabrese

Retrospective Theses and Dissertations

In recent years, stormwater has been found to be a major source of pollution to receiving waters. Major research efforts have been directed in this area, primarily as a result of the Federal Water Pollution Control Act and Public law 92-500, the 1972 Amendments to the act. Yet, a need remains for more data in the field of stormwater management. Such needs include cost-performance data and planning methodologies to optimally select best management practices (BMP's). The research culminating in this report addresses these needs. A computer program, "MANAGE", has been written to generate cost/efficiency curves, and uses these curves to …

Critical Exposure Pathways: An Analysis Of The Environmental Impact Of Gaseous Effluents From Light-Water-Cooled Reactors, Robert Danna

Retrospective Theses and Dissertations

The analysis of the environmental impact of routine radioactive gaseous releases from operating nuclear power stations is discussed using a radiation dose assessment. This analysis includes a discussion of the origin of radionuclide effluents, a discussion of federal policies, and a calculation of radiation doses to man. A model of estimating the radioactive dose from gaseous effluents from light-water-cooled reactors is described using guidelines described in the Code of Federal Regulations and the Nuclear Regulatory Commission's Regulatory Guides. The environmental impact of these sources is then analyzed using dose rates calculated along critical exposure pathways for various radioactive nuclides. Examples …

A Computer Program For Analyzing Moist Air In Fin And Tube Crossflow Heat Exchangers, Robert F. Stricker

Retrospective Theses and Dissertations

A computer model of a fin and tube air-to-air heat exchanger is presented. The model incorporates a computational scheme to account for latent effects due to small amounts of moisture in one or both fluid streams. A testing program is described which was performed in order to mathematically characterize the heat transfer and pressure drop relationships of the tube with turbulator used in the heat exchanger. These relationships are included in the computer model. A comparison of the computer model to heat exchanger test data indicates that the computer model may be relied upon to provide design and analysis information. …

Microcomputers: An Alternative For Digital Controllers, Richard Brooke Wavell

Retrospective Theses and Dissertations

Two candidate microprocessors are selected to demonstrate that microprocessors can be effectively utilized in digital control applications. The Intel 8085A-2 is selected to represent 8-bit microprocessors and the Intel 8086 is selected to represent 16-bit. A baseline second order digital filter algorithm is developed for comparison of the performance of the two microprocessors for both software and hardware multiply implementations. Emulation techniques are utilized to facilitate performance comparison, without large investments in software and hardware development. In addition, they provide a method for evaluating new microprocessors, before hardware becomes available. The emulations are then used to verify and to determine …

Energy In Agriculture: Energy For Greenhouses Part 1: Energy Conservation, George A. Duncan, John N. Walker, Larry W. Turner

Agricultural Engineering Energy Series

The increased cost and scarcity of all fuels have affected the greenhouse owner as badly as any segment of industry. For some, crops have been damaged or lost. For others, it has reduced the margin of profit. Growers, manufacturers, suppliers, horticulturists, engineers and many others have studied the situation thoroughly in order to come up with viable solutions and alternatives for conserving fuel.

Energy Fact Sheet: Heat Pumps For Residential Heating And Cooling: Some Questions And Answers, Larry W. Turner

Agricultural Engineering Energy Series

WHAT IS A HEAT PUMP?

A heat pump is an electrically-powered refrigeration cycle device which is capable of providing both heating and cooling to a residence. In the summer, it operates like an air conditioner by "moving" heat from inside the house to the outside. In the winter, the refrigerant flow is reversed, "moving" heat into the house by further chilling the already cold outside air and transferring the heat gained in the process to the inside.