Engineering Commons^™

Design Of A Vertical Axis And Turbine-Variable Speed Heat Pump Alternate Energy System, John V. Karnitis

Electronic Theses and Dissertations

The primary objective if the project is to design an unguyed wind energy conversion system consisting of a Savonius rotor assisted non-articulating 5m (15 ft) diameter Darrius vertical axis wind turbine, which is self-starting, and is mechanically coupled by a V-belt drive to an automotive air conditioning variable speed compressor. The variable speed-compressor is utilized as a mover for a variable speed heat pump system. The basic objective is further subdivided into the following objectives:
1. To develop a preliminary design of the wind energy conversion system, which later cane be modified to the existing energy needs.
2. To predict …

Design And Performance Of A Solar Energy Intensifier System For Drying Shelled Corn, Kenneth J. Hellevang

Electronic Theses and Dissertations

Since utilizing solar energy as an alternate energy source for agricultural applications is dependent on improvement in the design of solar systems and on documentation of the performance characteristics, reliability and economic feasibility of solar systems, research was conducted with the following objectives: 1. Design a multi-purpose solar energy system with a diurnally tracking solar energy intensifier and a thermal energy storage unit to warm the ventilation air for a swine confinement building and to dry corn. 2. Test the solar energy intensifier-collector system for corn drying under actual conditions. 3. Evaluate the performance and economic feasibility of a diurnally …

Boehmite-Bonded High-Alumina Refractories, Gerhard H. Schiroky

Masters Theses

"High-alumina refractories (99+ % Al₂O₃) were produced by pressing a mixture of 70% tabular alumina and 30% reactive alumina and autoclaving in saturated steam at 1.4 MPa (200 psia)/194 °C to 3.4 MPa (500 psia)/242 °C for 12 to 96 h. Autoclaving converted the reactive alumina to boehmite which acted as the bond phase. At room temperature the MOR ranged up to 37 MPa depending upon boehmite content. The hot-MOR decreased steadily with increasing temperature, but was still 8 MPa at 1400 °C which exceeds that of comparable cement-bonded or conventionally fired high-alumina refractories. The estimated autoclaving costs are lower …

Processing Of Copper Refinery Anode Slimes, Shrirang Anant Kulkarni

Masters Theses

"A study of commercial copper refinery anode slimes has been conducted to evaluate the separation of valuable metals contained in the slimes. The slimes contain substantial quantities of Ag, Sn, Au, Pb, and Cu. The values were present principally as AgCl, SnO₂, Au, PbSO₄, Cu and CuSO₄.

A Roast-Leach-Roast-Leach (RLRL) technique solubilized up to 91 pct of the Ag and 99 pct of the Cu from raw slimes.

The Pb-Sn separation was investigated using the following hydrometallurgical techniques: 1) DETA (diethylene triamine) leaching; 2) NaOH leaching; 3) (NH₄)₂CO₃ leaching; …

Pelletizing Of A Lead Sinter Machine Feed, Hung-Yang Tsai

Masters Theses

"A typical lead sinter machine feed can be pelletized in a drum pelletizer using tap water as a binding liquid. The green pellets produced have return sinter as cores, and an outer layer of new material and fluxes. The moisture content of the pellets produced is about 5%. The pelletizing procedure developed used raw materials from the Amax Lead Smelter, with only a minor amount of feed preparation. The importance of proper moisture control, use of binders, method of adding moisture, speed of pelletizing drum, etc. were investigated. The stability of pellets under extreme storage conditions was also determined"--page ii.

A Resource Survey Of Hydroelectric Power Potential In Utah And Southeast Idaho, Calvin G. Clyde, Eugene K. Israelsen, Win-Kai Liu

Reports

N searching for alternative sources of energy to supply growing demands, it is essential that renewable sources by thoroughly considered. An essential early step in further hydroelectric power development is to understand in detail the amount and location of the resource. This survey of hydroelectric power potential covers the entire State of Utah, the Bear River Basin in Idaho and Wyoming, and the small part of the Snake River drainage lying in the Utah Power and Light Company service area in Idaho. Streams were covered initially if their flow was estimated to exceed 36 cfs 50 percent of the time. …

Test 1310: Massey-Ferguson 2705 Diesel 24-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 …

A Metallurgical Evaluation Of The Mi Vida Prospect: A Mixed Copper Sulfide-Carbonate Ore Body, Sells, Pima County, Arizona, Kevin Michael Kenney

Masters Theses

"A copper-prospect in south-central Arizona has been evaluated on a metallurgical basis. Primary chalcocite and secondary covellite, plus the copper oxides malachite and brochantite, constitute the economic mineralization. The deposit outcrops as a steeply dipping (70°SW), intensely brecciated, copper-bearing quartz vein with discontinuous lenticular ore shoots.

Acid leaching techniques alone and in conjunction with froth flotation utilizing four copper oxide specific collectors were used to evaluate the amenability of this ore to processing. Direct acid leaching was examined and found to be ineffective. Removal of the chalcocite by froth flotation with xanthate was easy and gave better results to subsequent …

A Computer Model For Evaluating Corn Harvesting, Handling, Drying And Storage Systems, Thomas C. Bridges, Otto J. Loewer Jr., John N. Walker, Douglas G. Overhults

Biosystems and Agricultural Engineering Faculty Publications

No abstract provided.

Application Of Optimization Techniques To The Optical Design Of A Laser Seeker, David William Allemeier

Retrospective Theses and Dissertations

This report describes the development of a computer model for the design of a laser seeker optical system. A laser seeker is a device that detects pulsed laser energy. The computer model is configured to design the seeker optics based on the following performance criteria: Sensitivity to laser energy, which can be related to target acquisition range; optical field of view; and seeker optics cross section area. The design is defined by four variables and a set of fixed parameters, and is configured using computer optimization with both a direct search and a random search being used. A superior design …

Elimination Of Nematodes From The Soil By Microwave And Dry Heat, Behrouz Abbassi

Retrospective Theses and Dissertations

No abstract provided.

Digital Architecture For A Computer Based Imaging System, John Osborn Mcintosh

Retrospective Theses and Dissertations

There is a great need for a graphic simulation system used as a training device to take the place of actual flying. A good system will greatly reduce the cost of training men as well as cut down on casualties. Several systems have been tried and are now in use. Among them are two that are worthy of more study. These are the CCTV or model board and the digital systems. Both have several disadvantages that create a need for a new system. One such system is an optically based digitally processes system that combines the best features of two …

Wastewater Pretreatment System For A Printed Circuit Board Plant, Raymond F. Green

Retrospective Theses and Dissertations

The wastewater from the electroplating processes required for the production of printed circuit boards has a high heavy metal content. The regulatory agencies of both the Federal Government and the State of Florida set pretreatment limitations on the quantity of the hazardous heavy metal ions that may be discharged t o a receiving body of water or to a Publicly Owned Treatment Works. A number of treatment processes are available for the effective removal of these pollutants. The mechanism behind the more common processes are discussed in this paper. Many variables must be considered in the design of a wastewater …

A Passive Cooler For A Humid Climate, Steven Gilbert Ring

Retrospective Theses and Dissertations

This paper examine a passive cooling system for a humid climate. This system will be divided into two parts, a radiative system and an evaporative system combined into a roof pond system. Performance of the radiative system will be enhanced through the use of a selective cover which will make use of an atmospheric window between 8 and 13um. An attempt will also be made to thermally isolate the radiative system from convective gains with the evaporative system. The evaporative system will consist of a water, solvent and dye layer over the selective cover of the radiative system. The performance …

Molecular Size Distributions Of Heavy Metals In Lake Washington, William B. Andrews

Retrospective Theses and Dissertations

Four untreated and one magnesium treated water samples from Lake Washington, the potable water source for the city of Melbourne, Florida, were collected and analyzed for As, Cd, Cr, Cu, Fe, Pb, Ni, Zn, Mb, Ca, and color on the basis of molecular weight distribution. Molecular weight distributions of the samples were obtained using a Millipore ultrafiltration system and filters in the following sizes: 106, 105, 2.5 x 104, 104, and 103 nominal molecular weight limits (nmwl). Color causing materials in the untreated samples were found to be located in the molecular weight fraction greater than 2.5 x 104 nmwl. …

Two-Dimensional Scattering From A Medium Of Finite Thickness, Dwight C. Look

Mechanical and Aerospace Engineering Faculty Research & Creative Works

No abstract provided.

Simple Generation Of One-Parameter Pseudoterrain Surfaces, Gordon E. Carlson

Electrical and Computer Engineering Faculty Research & Creative Works

A simple method for generating digital terrain surfaces as a function of only the terrain standard deviation is presented. This is accomplished by fitting a postulated autocorrelation model to actual terrain data. Observed relations between model parameters are used to obtain a one-parameter model. Copyright © 1979 by The Institute of Electrical and Electronics Engineers. Inc.

Motion‐Compensated Transform Coding, A. N. Netravali, J. A. Stuller

Electrical and Computer Engineering Faculty Research & Creative Works

Interframe Hybrid Transform/dpcm Coders Encode Television Signals by Taking a Spatial Transform of a Block of Picture Elements in a Frame and Predictively Coding the Resulting Coefficients using the Corresponding Coefficients of the Spatial Block at the Same Location in the Previous Frame. These Coders Can Be Made More Efficient for Scenes Containing Objects in Translational Motion by First Estimating the Translational Displacement of Objects and Then using Coefficients of a Spatially Displaced Block in the Previous Frame for Prediction. This Paper Presents Simulation Results for Such Motion‐compensated Transform Coders using Two Algorithms for Estimating Displacements. the First Algorithm, Which …

Reduction Of Transmission Error Propagation In Adaptively Predicted, Dpcm Encoded Pictures, N. F. Maxemchuk, J. A. Stuller

Electrical and Computer Engineering Faculty Research & Creative Works

A New Technique for Reducing Transmission Error Propagation in Adaptively Predicted, dpcm‐encoded Pictures is Described. the Basis for the Technique is a Generalization of the Notion of Predictor Output Attenuation, Described by Graham, to Include Attenuation of the Adaptive Prediction Function. Simulation Results Are Presented that Show that Application of the Technique to Graham's Codec Results in Significant Reduction in Error Propagation Without Degradation of Picture Quality. the Technique Requires No Increase in Transmission Rate. © 1979 the Bell System Technical Journal

Toward More Meaningful Laboratory Experiences In Digital Signal Processing And Digital Control, Rodger E. Ziemer, D. Ronald Fannin, Paul D. Stigall

Electrical and Computer Engineering Faculty Research & Creative Works

Digital Signal Processing and Digital Control Are of Utmost Importance for Electrical Engineering Students, for They Are Present in Many Aspects of Today's Technical World. Complex Topics Like These Should Not Be Introduced into a Curriculum as a Crash Program but Taken as Steps in an Evolutionary Process. a Successful Example of This Evolutionary Process is Well Underway at the University of Missouri-Rolla. Copyright © 1979 by the Institute of Electrical and Electronics Engineers, Inc.

A Microcomputer-Based Data Acquisition System With Hardware Capabilities To Calculate A Fast Fourier Transform, R. A. Kobylinski, Rodger E. Ziemer, Paul D. Stigall

Electrical and Computer Engineering Faculty Research & Creative Works

The Fast Fourier Transform (FFT) Has in Recent Years Become an Important Tool to the Engineer. There Are a Number of Algorithms Which Calculate the FFT. One Such Algorithm is the Cooley-Tukey FFT Algorithm (Radix-2) Which Lends itself Rather Easily to a Combination Software and Hardware Implementation. with a Microcomputer as the Controller of a Data Acquisition Module and Hardware Which Computes the Butterfly Associated with the FFT Algorithm, the FFT Can Be Calculated Efficiently. © 1979 IEEE

Backscatter Inversion In Spherically Asymmetric Ionosphere, R. (Richard) E. Dubroff, N. Narayana Rao, K. C. Yeh

Electrical and Computer Engineering Faculty Research & Creative Works

It is Well Known that Various Diurnal and Morphological Features of the Ionosphere Reveal Substantial Departures from the Normally Simplified Assumption of Spherical Symmetry at Certain Times of the Day or at Certain Geographic Locations. a Radio Ray Passing through Such an Ionosphere Must Bear Information About its Horizontal Gradients. the Leading Edge of a Backscatter Ionogram is Formed by Obliquely Propagated Radio Rays of Minimum Time Delay and Hence is Useful in Deducing Information About the Ionospheric Horizontal Gradients. in This Regard, the Ionospheric Electron Density Distribution is Modeled by a Locally Quasi‐parabolic Layer with Six Parameters. This Six‐parameter …

Split-Set Rock Bolt Analysis, Robert L. Davis

Mechanical and Aerospace Engineering Faculty Research & Creative Works

A system of twelve equations have been developed for the elastic-plastic analysis of split-set roof bolts and these equations have been programmed for solution on the IBM 370/168 computer. Typical solutions have been presented in graphical form for comparison with experimental data. The results compare favorably for most of the split-sets providing the system parameters are properly specified. It appears that this analytical solution will be valuable to mining engineers since the solutions have been put in graphical form. Plots of the effects of the various parameters (material strength, material strain-hardening, friction, thickness, radius, angle of contact) on the holding …

Series Induction/Parallel Inverter Power Stage And Power Staging Method For Dc-Dc Power Converter, Don Cronin, John J. Biess

Mechanical and Aerospace Engineering Faculty Research & Creative Works

An improved series inductor/parallel inverter power stage and power staging method for a transistor controlled DC-DC power converter in which the integrating capacitance is located in the output of the power stage transformer and the series inductor has a secondary winding connected across this capacitance for transferring stored energy from the inductor primary directly to the transformer output rather than through the transformer, and current flow through the transformer primary is controlled by two parallel, alternately conducting pulse-width-modulated transistors in a manner such that only a single transistor is located in the main current flow path at any given time. …

Transform Domain Motion Estimation, J. A. Stuller, A. N. Netravali

Electrical and Computer Engineering Faculty Research & Creative Works

This Paper Introduces an Algorithm for Estimating the Displacement of Moving Objects in a Television Scene from Spatial Transform Coefficients of Successive Frames. the Algorithm Works Recursively in Such a Way that the Displacement Estimates Are Updated from Coefficient to Coefficient. a Promising Application of This Algorithm is in Motion‐compensated Interframe Hybrid Transform‐dpcm Image Coding. We Give a Statistical Analysis of the Transform Domain Displacement Estimation Algorithm and Prove its Convergence under Certain Realistic Conditions. an Analytical Derivation is Presented that Gives Sufficient Conditions for the Rate of Convergence of the Algorithm to Be Independent of the Transform Type. This …

Structural Stability Research Council: Proceedings 1979, Structural Stability Research Council

CCFSS Library (1939 - present)

One of the purposes of the Council is to maintain a forum where problems related to the design and behavior of columns and other compression elements in metal structures can be presented for evaluation and discussion. The Annual Technical Session provides an opportunity to carry out this function. The 1979 Annual Technical Session was held on April 24 and 25 at The William Penn Hotel in Pittsburgh, Pennsylvania. Eighty-five persons attended the Session and twenty-seven papers were delivered. A panel discussion on "Stability of Space Frame Structures" was held in the evening of April 24, 1979. The panelists were R. …

The Machinery Crisis, W T. Brown

Journal of the Department of Agriculture, Western Australia, Series 4

The machinery crisis - I believe we have come through a crisis in farming efficiency. To maintain his income, the farmer has had to reduce his costs of production, or increase production per man. He has done this by climbing to a new plateau of efficiency, and he expanded or got out; he has substituted capital for labour.

In many cases this means bigger, more powerful machinery. This is not a simple or easy move and there are many potential ways to mske the wrong decision.

How To Select A Tractor, W T. Brown

Journal of the Department of Agriculture, Western Australia, Series 4

A look at some of the factors to be considered when choosing a tractor for your farm. There is no one answer

Final Report On Project Feasibility : To Jacksonville Transportation Authority, November, 1979, Parsons Brinckerhoff, Flood &. Associates

Jacksonville and Duval Co. Miscellaneous

This report was prepared for the purpose of determining the feasibility of the DPM for the Jacksonville CBD. The gathering of data, the preparation of information, the research, the citizens' participation, the alternatives analysis, and the detailed planning were all done for the purpose of answering one basic question: Is a downtown people mover feasible for Jacksonville?

Molybdenum Stability In Coal Slags At 1400⁰C: Corrosion Properties For Mhd Electrode Applications., Kenton Brian Wright

Masters Theses

"Molten coal slag corrosion studies conducted on molybdenum at 1400°C used static and stirred slag experiments and electrical current experiments to parallel electrode conditions of slagging duct MHD generators. Crucibles containing molybdenum and slag were exposed to combustion-type gases in a tube furnace. Carbon monoxide-carbon dioxide gas mixtures controlled oxygen partial pressures at selected values between 10^-11 and 10^-3 atm. Metallograph and microprobe examination of polished sample sections defined corrosion characteristics.

At 1400°C, molybdenum metal is stable below 10^-9 atm oxygen pressure. Molybdenum dioxide is stable at higher pressure, but volatile molybdenum trioxides prevent formation of stable …