Engineering Commons^™

Thermally Stimulated Polarization Current Technique For Measuring The Electrical Conductivity Of Vitreous Solids, Chi-Ming Hong, D. E. Day

Materials Science and Engineering Faculty Research & Creative Works

The electrical conductivity of glasses determined by TSPC agrees well with that measured by conventional ac or dc techniques. The TSPC technique is a rapid and easy method of measuring the dc conductivity over the range 10−15-10−7 (Ω cm)−1 and is especially suited for conductivities <10−12 (Ω cm)−1. Polarization at the electrodes is easily detected and avoided.

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 …

An Adaptive Intraframe Dpcm Codec Based Upon Nonstationary Image Model, N. F. Maxemchuk, J. A. Stuller

Electrical and Computer Engineering Faculty Research & Creative Works

This Paper Introduces a Nonstationary Model for Images and Develops an Adaptive Intrafield Dpcm Codec based Upon the Model. the Codec Attempts to Minimize the Mean‐square Coding Error at Each Sample Point in the Picture. the Quantizer in the Resulting Adaptive Codec is Found to Be Similar to that Previously Obtained from Visual Masking Considerations. Comparative Simulation Results using 256 X 256 Pixel Rasters Are Given for Two‐ and Three‐bit/pixel Versions of the Adaptive Codec, the Three‐bit/pixel Graham Codec, and Three‐bit/pixel Previous Element Dpcm. © 1979 the Bell System Technical Journal

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

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. …

Phase Equilibria In Aqueous Magnesium Chloride, Sulfate, Chromate And Phosphate Systems, Ladawan Urwongse

Doctoral Dissertations

"In the first part of the present study, which is presented in Paper I, solubility of MgO in aqueous HCl solutions at 23° ± 3°C was measured and combined with analyses of neat magnesium oxychloride cements to construct an equilibrium phase diagram for the system MgO-MgCl₂-H₂O. Invariant liquids in equilibrium with Mg(OH)₂ and 5Mg(OH)₂·MgCl₂·8H₂O (5.1.8), with 5·1·8 and 3Mg(OH)₂·MgCl₂·8H₂O (3·1·8), and with 3·1·8 and MgCl₂·6H₂O were located at 0.8 ± 0.2 MgO, 17.0 ±0.5 MgCl₂; at 1.0 …

Deck-Reinforced Slab Systems, Max L. Porter, C. E. Ekberg Jr.

CCFSS Library (1939 - present)

No abstract provided.

New Trends In Building Design And Planning -- For The Age Of Energy Conservation, C. William Brubaker

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

In response to increasing energy costs, building design and planning are changing. Rational design can achieve many of the goals of energy conservation.

The Arizona Solar Tax Incentives Package, Donald E. Osborn

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

The State of Arizona has enacted into law one of the nation's most comprehensive and consumer oriented set of tax incentives to encourage the use of solar energy devices. The development of these incentives and their required regulations and guidelines are covered.

Solar Technology Inventory For The Mid-American Region, L. Icerman, S. K. Parker

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

A mailed questionnaire and telephone contact procedure was developed to identify solar equipment manufacturers in the Mid-American Solar Energy Center (MASEC) region and to collect information required to characterize the solar equipment manufacturing industry. Special emphasis was placed on assembling data that are useful in evaluating the commercialization status of the solar energy industry from an equipment supplier viewpoint.

Generation For Maximum System Efficiency, Charles A. Gross

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

This paper presents a method for solving for the generation combination that supplies a specific load demand at maximum efficiency in a multigenerator power system. The method accounts for transmission losses using the B constant approach and generating losses using heat rate data. Results are presented for an example test system.

Energy Conservative Electric Lines-Now!, Paul F. Pugh, A. S. Yeranian

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

This paper describes the components of a new energy conservative cable system and new methods to service prove new products without disturbing the existing power system. Methods are presented for attaching a new cable design to an existing system for a trial installation. It describes how field splices and taps are easily made to extend the line without a shutdown or disturbance.

Maxwellian Concepts Of Magnetro-Electrodynamics And The Reality Of Med Energy Producing Devices, Tom Day

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

"We can scarcely avoid the inference that light consists in the transverse undulations of the same medium which is the cause of electric and magnetic phenomena."

The Role Of The Civex Process In The Nuclear Industry, Thomas E. Eaton, Joseph C. Carter

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

The United States is committed to policies which would assure that the international, commercial nuclear industry cannot be exploited as a source of materials for nuclear weapons. The Civex process provides for a proliferation-resistant fast breeder reactor fuel cycle. Nevertheless, the risk of nuclear weapons proliferation involving the commercial nuclear industry is small compared to the risk associated with certain research facilities and military activities.

A Strategy For The Practical Utilization Of Thorium Fuel Cycles, Paul R. Kasten

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

There has been increasing interest in the utilization of thorium fuel cycles in nuclear power reactors for the past few years because of economic, fuel utilization, and pro- 1 iteration resistance factors. Also, it appears desirable to maintain the ratio of thermal reactors to fast reactors at a high value in the long term because of economic and proliferation resistance features. The analysis performed here concludes that the practical, early utilization of thorium fuel cycles in power reactors requires commercialization of HTGRs operating first on stowaway fuel cycles, followed by thorium fuel recycle. In the longer term, thorium utilization involves …

Toward A Methodology For Evaluation Of Solar Systems, William P. Moran, Gene E. Kouba, Bruce V. Ketcham

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

The shortcomings and inconsistences of the typical return-on-capital evaluation are detailed. Generalizations of evaluation objectives and performance measures and data gathering objectives are given.

Direct Energy Conversions Of Solar Energy, A. A. Rahman

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

In this paper, the design concepts of three direct energy converters were explained. The converters selected were thermoelectric, thermionic and magnetohydrodynamic converters. Discussions and analysis of the material limitations of these converters with possible improvements to make these devices suitable for domestic or public use was also explained.

Mississippi County Community College -- A Photovoltaic Demonstration Project, William M. Woodsmall Jr.

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

An overall view of the integration of all systems involved in the world's largest photovoltaic demonstration project.

Mississippi County Community College in Blytheville is presently being planned using a 240 KW ± photovoltaic collection field for its energy source. Systems include the collectors, thermal, process control, storage (both thermal and electrical) power conditioning, and the building itself.

On The Thermodynamics Of Direct Energy Conversions, A. A. Rahman

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

In this work, a generalized thermodynamic analysis was developed for direct energy converters that operate as heat engines. Examples for various converters as thermoelectric, MHD and Nernst generators were solved. The possibilities of utilizing these concepts on designing generators to convert heat or solar energy directly into electricity were also discussed.

Low Btu Producer Gas -- A Fuel Of The Past And A Fuel Of The Future, Lee Carter

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

A prime purpose of this paper is to give conscious emphasis to an important type of coal gasification, one that does not demand hundreds of millions of dollars to launch an experimental program but instead is essentially ready to use after a reasonable and straightforward engineering check-out of the local coal sources and the prospective gas demand.

That type of coal gasification results in low Btu producer gas. This paper deals with its history, its technology and its economics. In the light of that information, the future of low Btu producer gas in America then is assessed.

Long Term Stability Of Linearized Thermistor Circuits, Gene E. Kouba

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

The long term accuracy and stability of linearized thermistor circuits used for temperature measurements in a solar home monitoring project are being evaluated by periodic calibration.

Methane Production From Livestock Wastes By Anaerobic Digestion, Panos Kokoropoulos, Harlan H. Bengtson

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

Increasing interest is being shown in anaerobic digestion as a process for both waste treatment and energy production. In this paper an experimental procedure for investigation of anaerobic digestion of livestock wastes is described, and data from experimental work is presented and analyzed. A model of anaerobic digestion is developed which includes conversion of soluble COD to volatile suspended solids by growth of microorganisms and solubilization of volatile suspended solids to soluble COD by enzymes. This model is used for the analysis of the experimental data.

Ambient Air Quality As Related To Energy Conversion Facilities, Economic Activity And Population, Walter P. Page

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

The paper examines the relationships between ambient air quality and energy conversion facilities, economic activity and population. Additional results are presented from investigation of the relationship between ambient air quality and total emissions from four source categories.

Some Problems With Economic Models Involving Air Pollution, John Hoag, J. David Reed

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

In this paper we consider how economic models have interfaced with environmental problems in three areas: optimal air quality standards, pollution control policy and growth with pollution. The focus is on what has been done and what should be done.

Stabilization Of Uranium Mill Trailings, N. H. Tibbs, D L. Rath, E. E. Otto, L. F. Alsup

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

Large volumes of uranium mill tailings are being generated, requiring comprehensive long-term management programs to reduce health and environmental risks. Management programs are available which provide adequate secure long-term storage, but research on innovative concepts is necessary to develop improved, more efficient methods.

Energy Is Not Just Flipping The Switch Any More, Alfred L. Ransome

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

The energy industry -- or basically the mining industry -- is becoming more complex and costly. It is imperative that the facts pertaining to the mineral industry be disseminated to the layman; the best method in the long term is by way of science and economics in the schools -- kindergarten through high school. The Mineral Information Committee of the Colorado Section of the SME-AIME in cooperation with the Metro State College, Denver is embarking on such a program, and the newly developed magazine, "RESOURCES", is the vehicle for spreading the message through the classroom.

Effective Utilization Of Energy From Biomass Residues In Agricultural Applications, Harry W. Parker

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

Biomass is one of the more attractive alternative energy sources. Use of existing biomass residues within the farm and ranch economy can be accomplished with a minimum of organizational problems since the producer, processor, and consumer may be the same person or organization. The major task is to provide potential agricultural biomass users with accurate cost estimates for the energy made available from the biomass, and contemporary technology for its utilization.

Specific examples are given with regard to powering irrigation well engines with cotton gin trash via a producer gas generator, and conversion of harvested mesquite wood to digestible energy …

Concentration Of Solar Energy Using A Cassegrain Type Solar Furnace, M. H. Cobble, W. C. Hull

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

A solar furnace consisting of a paraboloid of revolution that tracks the sun, and a hyperboloid of revolution reflector that has a focus in common with the paraboloid is analyzed using a three-dimensional ray trace to determine the image shape and size, and for the concentration to be obtained for various eccentricities e of the hyperboloid when used with an 84 foot diameter paraboloid (radar dish).

The Solar Connection -- Promise Or Peril?, Paul S. Strong

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

During the past decade important progress has been made in understanding the sun-earth environmental system. Modern observations of solar activity document changes in solar output over time scales ranging from seconds to decades, and evidence for longer term variations have been found in historical records. It follows that the sun cannot be considered to be a totally non-variable energy source. Continued research progress into solar-terrestrial interactions will hopefully provide an understanding of sun-weather/climate relationships resulting in energy conservation through more efficient energy utilization of our planet's atmospheric energy system.

Commercially Available Vacuum Tube Solar Collectors, Stanley J. Ring

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

Efficiencies on the order of 50 percent with high differential temperature (150° C) have been advertised with the current distribution of commercially available evacuated tube collectors. Product specifications and, where possible, experimental data have been gathered and presented. The paper also develops a mathematical model for evaluation of these collectors. Results conclude that, although performance is high, collector expense limits the cost effectiveness to necessary high-temperature, high-volume applications. These include both residential cooling and industrial processing.