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Excitation Transfer Collisions And Electron Seeding Processes In A Resonantly Excited Sodium Vapor, D. J. Krebs, Laird D. Schearer

Physics Faculty Research & Creative Works

A dense sodium vapor in a high-pressure buffer of argon has been simultaneously excited by short (4 ns) laser pulses from two lasers: the first tuned to one of the D line transitions at 589 nm and the second tuned to the photoionization threshold of the 3p states near 406 nm. The temporal evolution of the system was studied with and without the photoionizing laser pulses. At early times (∼100 ns) excited state populations are determined by energy transfer collisions between two laser-excited 3p atoms while the ion/electron density is controlled by super elastic heating of "seed" electrons followed by …

N,L Distributions In Aq++H Electron-Capture Collisions, R. (Ronald) E. Olson

Physics Faculty Research & Creative Works

The classical-trajectory Monte Carlo method has been used to determine product-state distributions in Aq++HA(q-1)+(nl)+H+ electron-capture collisions at energies 50 and 100 keV/amu for fully stripped ions in charge states q=1to 20. In the energy region studied, the electron-capture products are found to populate predominately principal quantum numbers around nmq34. Such behavior implies the captured electron tries to preserve both its original orbital energy and dimensions after the electron-capture collision. The orbital-angular-momentum quantum numbers l are more highly peaked than statistical to large l values for nnm. © 1981 The American Physical Society.

Performance Of Third Harmonic Ground Fault Protection Schemes For Generator Stator Windings, R. L. Schlake, G. W. Buckley, George Mcpherson

Electrical and Computer Engineering Faculty Research & Creative Works

The paper shows how the normally generated third-harmonic voltage can be used to protect the lower ten to twenty percent of generator stator windings against ground faults. A method of determining the applicability of the scheme to a given machine is described which takes into account the design of the generator and its externally connected apparatus. The effects of finite resistence ground faults are also investigated and other advantages of the scheme, such as protection of the neutral, are also highlighted. Copyright © 1981 by The Institute of Electrical and Electronics Engineers, Inc.

Phase 1 Inspection Report: National Dam Safety Program. Mississippi - Kaskaskia - St. Louis Basin. Lake Adelle Dam, Jefferson County, Missouri, Crawford, Murphy & Tilly, Inc., Springfield, Illinois, A & H Engineering Corporation, Carbondale, Illinois

Missouri Dam Safety Inspection Reports

This report is prepared under guidance contained in Department of the Army, Office of the Chief of Engineers, Recommended Guidelines For Safety Inspection Of Dams, for a Phase I investigation. The purpose of a Phase I investigation is to identify expeditiously those dams which may pose hazards to human life or property. The assessment of the general conditions of the dam is based upon available data and visual inspections. Detailed investigations and analyses involving topographic mapping, subsurface Investigations, testing and detailed computational evaluations are beyond the scope of a Phase I investigation; however, the investigation is intended to identify any …

Phase 1 Inspection Report: National Dam Safety Program. Mississippi - Kaskaskia - St. Louis Basin. Lac Marseilles Dam, St. Francois County, Missouri, Woodward-Clyde Consultants, Chicago, Illinois

Missouri Dam Safety Inspection Reports

This report presents the results of field inspection and evaluation of the Lac Marseilles Dam. It was prepared under the National Program of Inspection of Non-Federal Dams.

Load And Resistance Factor Design Of Cold-Formed Steel Structural Members, Boonsong Supornsilaphachai

Doctoral Dissertations

"In a traditional design, the Allowable Stress method has long been used for the design of cold-formed steel structures. In this design approach, the allowable stress is always used to prevent the possible structural failure by using an appropriate factor of safety selected primarily on the basis of engineering judgment and long-time experience.

Recently, the concepts of risk and reliability analysis have been successfully applied to many fields of engineering. By applying the theories of probability and statistics, the load and resistance design criteria for steel structures have been developed for the design of hot-rolled steel shapes and built-up members. …

An Investigation Of The Nickel-Cobalt Occurrence In The Southeast Missouri Mining District, David Ray Jessey

Doctoral Dissertations

"A study of the occurrence of nickel and cobalt in the Southeast Missouri Mining District has revealed several significant geochemical trends and mineralogical relationships. Regional geochemical studies indicate that the greatest concentration of nickel and cobalt occurs in the Fredericktown area. Mines in the Viburnum Trend also have significant concentrations of these metals. Studies of the Viburnum Trend have established that both nickel and cobalt decrease in concentration southward from the Magmont mine to the Brushy Creek mine, increase at the Fletcher mine, and decrease again at the Sweetwater mine.

A detailed geochemical study of the Buick mine has shown …

Neutron Activation Analysis Of Nuclides From Stellar And Man-Induced Nuclear Reactions, Lawrence Lee Oliver

Doctoral Dissertations

"Neutron activation and γ-counting were used to determine the relative abundances of six stable tellurium isotopes in the acid-etched residues of the Allende meteorite. The results were correlated with the isotopic compositions of xenon and the elemental abundances of helium and neon in similarly prepared residues. Nucleosynthesis appears to be the only viable explanation for the anomalous isotopic and elemental compositions observed in these residues. Our results suggest that the solar system condensed from an isotopically and chemically zoned nebula that was produced by the explosion of a supernova, concentric with the present sun.

A combination of neutron activation and …

Transverse Thermal Response Of A Composite Bridge, Michael J. Filla

Masters Theses

"A two-span, composite-design, test structure was subjected to thermal loading. The resultant longitudinal and transverse response was correlated with that calculated by a prior theoretical procedure. The theoretical procedure was reconfirmed for longitudinal stress, and indicated within reasonable probability for transverse stress. No measurable diaphragm influence was observed"--Abstract, page iii.

Electron Transport Coefficients And Excitation Processes In Gaseous Mixtures Containing Mercuric Bromide, Howard Lundgren Brooks

Doctoral Dissertations

"A comprehensive set of measurements of the electron drift velocities and apparent ion formation cross sections has been completed for gaseous mixtures containing mercuric bromide using electron swarm techniques. Results are presented for binary mixtures of HgBr₂ and the rare gases neon, argon and xenon, with the concentration of HgBr₂ varied from 0.01% to 0.2% of the total. None of the measured quantities show a temperature dependence from 100 ° C to 150 ° Cover the range studied from 1 to 100 Townsend (1 Townsend = 1 Td = 10^-17 volt•cm²) in all of the …

The Missouri Miner, December 04, 1980

The Missouri Miner Newspaper

No abstract provided.

The Inert Gas Effect On The Rate Of Evaporation Of Zinc And Cadmium, P. C.S. Wu, Thomas J. O'Keefe, Fred Kisslinger

Materials Science and Engineering Faculty Research & Creative Works

An experimental study has been made to investigate the effect of argon and helium on the rate of evaporation of zinc and cadmium under one atmosphere pressure at temperatures ranging from 500 to 850°C. The experimental results were compared with the maximum rates calculated using the effusion formula as well as with values obtained using two different types of equations based on kinetic theory, diffusion theory, and empirical data. Equations have been derived for expressing the rate of evaporation of zinc and cadmium in both argon and helium as functions of temperature of the liquid zinc and cadmium. It was …

The Missouri Miner, November 06, 1980

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, October 30, 1980

The Missouri Miner Newspaper

No abstract provided.

Welded Connections In Cold-Formed Sections, Frans Soetens, Jan W. B. Stark

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

The Design Of Adjustable Storage Shelves, J. Rhodes, William King, James M. Harvey

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

European Recommendations For Cold-Formed Sheet Steel In Building, E. R. Bryan

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

A Review Of Ashrae Standard 100: Energy Conservation In Existing Buildings, Albert W. Black Iii

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

The ASHRAE 100 Series of Standards, Energy Conservation in Existing Buildings, has been through two open reviews and is presently being edited prior to publication. The draft standards are discussed in this paper and compared with ASHRAE Standard 90, Energy Conservation in New Building Design.

Acid Precipitation: The Coal Legacy In The Upper Midwest, Dennis M. Richter

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

Increased use of coal in industry and utilities has resulted in acid precipitation associated with SOx and NOx emissions. The resultant aquatic and terrestial problems, and their solutions, are of considerable concern to the upper Midwest states.

Templifier Heat Pump, Tony Conigliaro

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

The national energy policy rightly addresses having coal assume a major share of the load carried by gas and oil. However, there is a basic strategy which is uniquely capable of solving much of the dilema. That strategy is to shift from our present oil/gas combustion energy economy to a coal - nuclear electric energy economy....

We can see that electric boilers are non competitive from an operating cost standpoint. But there is another way of applying electricity to the creation of useful heat and that is the heat pump. Several years ago, a Westinghouse feasibility study indicated that an …

The Price Of Oil, R. W. Clack

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

An examination of major forces in the petroleum market with primary emphasis on the decade of the 1970s. The market force (s) responsible for the factor-of-ten increase in the price of crude oil is isolated, if not identified. The market's "message" is set forth for energy policy planners.

Managing In An Energy Scarce Environment, John Amos

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

Present engineering management principles, operations research techniques, and economic theories were mainly developed dealing with only one scarce resource -- capital. Today, the engineer manager must consider another scarce resource -- energy. In the past, energy was never considered a major factor; i.e., equipment was considered a good investment if labor was reduced, regardless of energy cost. Many other managerial decisions are similar; therefore, the engineer manager must understand why many decisions based on traditional techniques may be misleading. The engineer manager must now utilize more complex engineering management techniques instead of evaluating only one factor or using rules of …

The Energy Conservation And Safety Dilemma, Burns E. Hegler

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

Since the beginning of the energy crisis, efforts to conserve energy often have seemed to be diametrically opposed to the precepts of safety. This is true if conservation is not planned and conducted properly. However, energy and safety can be quite compatible and may work to their mutual advantage if effectively managed.

Energy Management In Institutional Facilities, Raj Kumar

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

Insitutional buildings present a challenge for energy conservation because their operation is year-round, seven-day-a-week, twenty-four per day. In this paper, the author examines year-round heat rejection sources and shows how an energy reclaim system that reuses cooling system waste heat for preheating service hot water proves effective for successful energy management.

Energy And Economic Development, Steven Skeet Chang

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

The paper sets out to examine the impact of energy crisis on the world economy in general and the less developed countries (LDCs) in particular. To clearly and fully understand the economic problems confronting LDCs in the era of energy shortage, it is necessary to formulate a general structural theory of economic development. A more comprehensive multidimensional indicator of economic development should also be constructed to measure the industrialization of the LDCs under study.

Technological Status And Legal/Regulatory Aspects Of Low-Head Hydroelectric Power Development In Missouri, Charles Darwin Morris, Gordon E. Weiss

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

This paper will present the broad overview of hardware availability, systems design and 1egal/regulatory constraints presently connected with the development of small hydropower systems in water rich areas such as southeastern Missouri. There is great interest being evidenced today on the part of major federal agencies and some power companies in regard to the feasibility of utilization of the power potential inherent in small streams. The topic is of particular interest to Missourians because of the vast number of small streams present in Missouri.

Energetics Of Moving Magnetic Waves, Tom Day

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

Magnetism has had a certain and specific appeal of human inquiry for at least the past forty centuries of civilization. History is full of adventures into the unknowns about this natural phenomenon. Recent findings hint of a hidden physical world concerning magnetism which prompts continued exploration. Curvilinear motion on a continuous basis can be detected within a magnetic field consisting of large, slow moving spiral wave patterns. This paper presents a procedure whereby the reader can establish his or her own findings about the power and energy of magnetic conductance. Avenues of basic research are explored and discussed.

Wood Fuels In Power Generation, Yildirim Omurtag, Larry Wetzel, Michael Mcevilly

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

In order for wood to be considered a feasible energy source for power generation, it must prove to be economical, meet society's pollution criteria, and provide sufficient energy to meet its regional demand applications or requirements. This report looks at wood's availability, its potential as a fuel source, the different methods of energy conversion, and lastly, submits conclusions and recommendations concerning wood-fueled power generation.

The information and background was supplied and supported by actual application, government publications and documentations, and other sources. The availability report includes living biomass, wood residues, and potential biomass expansion. Once availability was determined, the portion …

Solar Energy Teaching Lab With Large Scale Working Model, Jim Pearson, Tom Cook

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

An active solar energy retrofit has been added to an engineering building at John prown University. A new system dependent evaluation procedure incorporating the f-chart method was used for panel selection. The system is designed and instrumented in order to provide various laboaratory experiences and data collection capability. Data collection and system control are provided by a microcomputer.

Superconducting Magnetic Energy Storage: A Cost And Sizing Study, Haur D. Shaw, J. Derald Morgan, Max Darwin Anderson

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

Two applications for superconducting magnetic energy storage (SMES) devices in power systems are studied. One is for peak shaving, and the other is for load leveling. Consideration is given to placing these devices near load centers to reduce the line losses. For (SMES) cases studied using smaller size devices at several load centers, the line losses are lowered. However, the efficiency of SMES is proportional to its size, and the capitol cost per MWH is much greater for a smaller size SMES unit when compared to a larger SMES unit. Once the location or locations for SMES have been selected, …