Digital Commons Network^™

Planning For The On-Orbit Servicing Of Military Spacecraft, Michael E. Russell, Robert M. Tayloe

Theses and Dissertations

On-orbit spacecraft servicing for military programs is examined. The military community appears to be somewhat reticent to embrace or, in some cases, to even consider on-orbit servicing. The civilian community appears enthusiastic about the potential of on-orbit servicing and the majority of economic studies of civilian missions show servicing strategies to be an attractive alternative to most expendable spacecraft strategies. A model called SATSERV is presented. This model can be used to conduct economic comparisons from an overall standpoint between expendable and servicing strategies. The model is implemented in a microcomputer spreadsheet format for rapid implementation and application along with …

Measurement Of Air Force Fire Department Productivity: An Evaluation Of Efficiency/Effectiveness, Timothy A. Byers, Susanne M. Waylette

Theses and Dissertations

This research was sponsored to develop a method of evaluating the productivity of Air Force Fire Departments. Using the tasks developed by the Fire Department Workshop, input and output measures were defined and used in a new model of efficiency called Constrained Facet Analysis (CFA). The advantage of this methodology over others considered was that it can simultaneously evaluate multiple inputs and multiple outputs using empirical data with no a priori weighting. The results of the analysis provided an efficiency rating for each fire department and information about marginal rates of substitution and marginal rates of productivity for inefficient units …

Void Fraction During Gas Flow Through A Stagnant Liquid Column In Annular Geometry, Rehana Rahman

Theses and Dissertations

This thesis presents a study of void fraction when gas (air) is bubbled through a stagnant liquid (water) column in annular geometry. The apparatus used resembles an oil-well with a casing (outer tube) of 6.5 inch inside diameter, and it stood eight feet high. Three different sizes of replace able tubing (inner tube), ranging in outside diameter from 2.38 to 4.49 inches, were used to investigate the effect of annular diameters on void fraction. Superficial gas velocity, which is the single most important variable in determin ing void fraction, was varied from 0.015 to 0.60 ft/sec. The column temperature did …

Hot Water Drying Of Subbituminous Coal, Ajit Thomas Joseph

Theses and Dissertations

This study investigated the reduction of moisture of a Sarpy Creek Montana subbituminous coal when it was heated under pressure in a water slurry. This method of drying is called hot water drying. The temperature range investigated was from 260 C to 360 C. Two particle sizes were studied, namely, 0.4699 cm and 0.0505 cm mean particle diameters. The average initial moisture content of the coal was 26.87 percent.

The hot water drying was performed in a cold charge auto-clave. The coal-water slurry was charged, heated to desired temperature and held at that temperature for 15 minutes residence time. It …

Rheological Behavior Of Coal-Water Slurries, Angara Venkata Ramana Rao

Theses and Dissertations

The rheological behavior of coal-water slurries was stud ied, using a Brookfield Rheolog viscometer with a thermosel system to maintain constant temperature. The coal used for making up the slurries was Sarpy Creek subbituminous coal from Montana. The effect of particle size, slurry concen tration and hot water drying process on the rheology was in vestigated. The particle size used ranged from 0.223 mm to 0.044 mm mean particle diameter, and the solids concentra tion in the slurry varied from 15 to 70 weight %. Tempera ture was maintained at 28 C (82 F).

Coal-water slurries exhibited a pseudoplastic behavior. …

A Student Guide To Autotab, Thomas L. Reardon

Theses and Dissertations

No abstract provided.

A Descriptive Study Of Female Elementary School Principals In The State Of North Dakota During 1982-1983, Shirley E. Boom

Theses and Dissertations

No abstract provided.

Chapter 11 Reorganization: Creative Management Or An Abusive Of The System?, William R. Zilliot

Theses and Dissertations

Recent developments within the Bankruptcy Court system are controversial. Several of the largest corporations in the United States are currently undergoing reorganization. To some companies, Chapter 11 is the only way out of staggering debt, to others Chapter 11 is a means to stall liability suits, and to still others Chapter 11 represents a way to force wage concessions in the place of honoring union contracts. The entire Bankruptcy Court system itself has been successfully challenged as being Unconstitutional, and continues to operate only by a special dispensation from Congress.

When these developments are placed in an historical context, they …

The Effect Of Two Catalysts (Ammonia And Quinoline) On The Liquefaction Of North Dakota Lignite, Chia-Shiun Lee

Theses and Dissertations

The effects of two disposable catalysts on liquefaction of lignite were evaluated by comparison of overall conversions and yields of distillate. All experiments were conducted using a tubing bomb reactor at temperatures ranging from 400˚C to 440˚C for a period of twenty minutes.

Using ammonia, a reaction temperature of 420˚C and a reducing gas of either synthesis gas or carbon monoxide gave the maximum yield of distillate. While ammonia promotes the formation of distillate, overall conversion is not increased. Quinoline had no significant effect on the overall conversion and distillate yield, except in the presence of hydrogen at 420˚C.

Model Dichotomous Key For Plastics Identification, Diane L. Burnham

Theses and Dissertations

The purpose of this study was to investigate selected plastics when treated by means of heat, fire, solvents, and specific gravity tests for the development of a model dichotomous key.

The study included: (1) a review of literature that contained a brief historical overview of plastics, an examination of their uses, advantages, and chemical make up, and the selection of four tests to be conducted that would reveal characteristics of the plastics, (2) an explanation of the equipment, materials, and procedures for each of the tests, (3) an analysis of the data obtained from the tests, and (4) a recommendation …

The Relationships Among Performance Ratings, Job Satisfaction Perceptions, And Preferred Non-Monetary Rewards For Elementary School Teachers, Beth Stangeland Randklev

Theses and Dissertations

The purpose of this study was to determine whether or not there was a relationship among job satisfaction, preferred rewards, perceptions of teachers' performance, and selected demographic variables for elementary classroom teachers in North Dakota and Minnesota. Eighty-five teachers from seven selected elementary schools comprised the sample.

Data were gathered by employing the following instruments: the Teacher Performance Assessment Instrument (TPAI), the Job Descriptive Index (JDI), and a preferred rewards instrument designed by the researcher to measure the desirability and availability of various rewards. Teachers also completed a demographic information sheet which was used in the data analysis.

The analysis …

A Comparison Of Perceptions Of Selected Germanic Executives To Determine If Case-Study Analysis Education Affects Their Decision-Making Process, Richard L. Painchaud

Theses and Dissertations

Problem. The problem of this study was to determine if case-study analysis education was perceived to affect top-level executives in making operating decisions without favoring any of the twenty-two selected influences.

The term selected influences was adopted to represent the twenty-two inputs or variables that were selected as modifiers in the managerial decision-making process. These inputs to decision-making represent many of the functional, social and cultural areas influencing daily life.

Procedures. The study was conducted between September 1983 and February 1984 in the Vienna, Austria (Europe) area.

Seventy-seven top-level executives holding the position of Generaldirektor, Vorstandes, Geschaftsfuhrer, Minister, or Ambassador …

Thermal And Kinetic Analyses Of The Pyrolysis Of A Northern Great Plains Lignite, Ross Steven Hefta

Theses and Dissertations

The pyrolysis of Indian Head lignitic coal in argon, carbon monoxide and hydrogen was studied to obtain a kinetic model of the process and to determine heat effects . A Du Pont 910 differential scanning calorimeter and a Du Pont 951 therm ogravim etric analyzer were utilized to measure heat effects and weight loss respectively.

N eith er the s in g le - r e a c t io n nor the d is tr ib u te d a c t iv a tio n energy p y r o ly s is models generated k in e …

Rheological Study Of A Direct Liquefaction Feed Slurry, Dennis L. Laudal

Theses and Dissertations

A rheological study was made of a liquefaction startup- feed slurry. The slurry consisted of North Dakota lignite sized to 70% less then 200 mesh and a carrier solvent of an thracene oil. The rheological behavior of the slurries, o with coal concentrations of 0 to 40% at 40 C, was shown to be Newtonian, allowing Bernoulli's equation to be used for direct calculation of pressure drop. Calculated values pre dicted the measured data within 10% for the test conditions.

The investigation used an experimental slurry loop, con sisting of a bank of pipes with nominal sizes ranging from 1 …

Atmospheric Emissions From A Gasifier Wastewater Fed Cooling Tower, Sheila J. Galegher

Theses and Dissertations

Atmospheric emissions from a gasifier wastewater fed cooling tower were studied to determine their environmental effects and their contributions to single-component cooling tower mass balances. The feasibility of using a multicyclone device to separate cooling tower drift from evaporate was also investigated, as was the applicability of sensitive paper and isokinetic tube drift measurement. Data was collected during the operation of a pilot scale cooling tower at the University of North Dakota Energy Research Center. This forced-draft counter flow tower was fed with minimally treated wastewater generated in slagging fixed-bed gasification of lignite, and operated at ten cycles of concentration. …

A Study Of Job Satisfaction Of Small Market Radio Station Managers, Lawrence William Etling

Theses and Dissertations

This thesis studied job satisfaction of small market radio station managers in North Dakota, Northwestern Minnesota, and Eastern Montana. Thirty-three managers were surveyed by mail questionnaires, telephone interviews, and personal interviews.

The data were used to answer twelve questions regarding factors relating to managerial job satisfaction. From those questions asked, the most significant conclusions drawn were: 1. Factors which probably relate to managerial job satisfaction in small radio stations are: making full use of one’s managerial abilities; exercise of authority; dealing with a variety of job challenges; salary; and using one’s own judgment. 2. Factors which probably do not relate …

The Compatibility Of Management Advisory Services And Audit Independence, Nancy J. Anderson

Theses and Dissertations

No abstract provided.

The Nonconformists Of Leeds In The Early Victorian Era: A Study In Social Composition, Susan L. Fales

Theses and Dissertations

This thesis examined the Nonconformist denominational membership in the Borough of Leeds during the early Victorian era to determine the social composition of its members. The chapel goers of Old Dissent, represented by the Unitarians, Baptists, Independents, and the Society of Friends, and New Dissent, represented by the Wesleyan Methodists, Methodist New Connexion, Primitive Methodists and the Mormons were the basis for this study. The results of the occupational, residential, family, and migration analysis revealed a surprisingly high percentage of working classes (72) represented among the Dissenters. This fact flys in the face of contemporary observation and historical investigation, which …

Toward A Normative Computer-Aided Contingency Planning Protocol, Peter H. Aiken

Theses and Dissertations

This thesis effort is an investigation into the subject of contingency planning.

Increases in the number of organizations operating in "turbulent environments" have highlighted deficiencies in planning methodologies which attempt to base continued organizational survival upon a single course of action. In these instances, organizations experience an increase in the number of variables and possible events for which they must be prepared. Traditional contingency planning efforts attempt to prepare the organization for the occurrence of events that are foreseen deviations from "the master plan". When operating in turbulent environments, organizations must plan to move quickly through a series of differing …

The Incidence Of Obesity In Lds College Women: The Effect Of Selected Physical Socio-Environmental Variables On Total Percent Body Fat In Two Populations Of Lds Women, Carrie Tanner Summers

Theses and Dissertations

The purpose of this study was to determine the effect of selected physical socio-environmental variables on total percent body fat. The sample population consisted of single, LDS, white women attending Brigham Young University (BYU) and California State University at Fullerton (CSUF). Significant data as well as trends that appeared were included in this paper.

From the data collected, it was concluded that the sample populations at BYU and CSUF were the same. The incidence of obesity was determined only among individuals attending both universities. The entire sample population mean was 22.19 percent. This percentage did not meet the obesity criteria. …

The Effects Of Seismic Blasting On Shallow Water Wells And Aquifers In Western North Dakota, Frank W. Beaver Jr. P. E.

Theses and Dissertations

Seismographic petroleum exploration throughout North Dakota has generated concern over the effects of blasting on groundwater supplies and wells. A preliminary investigation revealed complaints alleging declining productivity and decreased water quality in regions where coal aquifers are extensively used. Unplugged shotholes were frequently cited as a source of problems.

Experimental results indicate that changes due to blasting occur within long term physical the aquifers rather than in specific water wells. Pumping tests conducted in a sand and coal aquifer system showed no apparent physical effects when shots were detonated one quarter mile away from the pumping wells. Shots 500 feet …

Lignite Liquefaction Using Carbon Monoxide, Hydrogen And Water In A Hot Charged, Two-Staged, Batch Autoclave System, John James Gagliardi

Theses and Dissertations

The effects of second stage temperature and the effects of the type of solvent used on the liquefaction of North Dakota lignite in a staged liquefaction process were investigated. The UND hot-charge, time-sample, batch autoclave facility was used for the experimentation. Approximately one hundred and fifty grams of moisture- and ash-free (MAF) lignite, three hundred grams of solvent (either anthracene oil or a hydrogenated anthracene oil was used as the solvent), and seventy five grams of water were reacted in the hot charged experiments. Carbon monoxide was used in the first stage and hydrogen and one hundred grams of solvent …

Heat Transfer To Horizontal Tubes In A Pilot-Scale Fluidized-Bed Combustor Burning Low-Rank Coals : A Comparison Of Heat-Transfer Coefficient Equations, Eric S. Sorenson

Theses and Dissertations

No abstract provided.

The Developing Trends And Their Perceived Impact Upon Minnesota Post-Secondary Vocational-Technical Education (Future, Change, Training)., Keith Mel Togstad

Theses and Dissertations

The problem of the study was to determine the perceived degree of impact of selected technological, economic, programmatic, legislative, and sociological trends which could affect post-secondary vocational-technical education in Minnesota.The purpose of this study was to provide information useful to Minnesota post-secondary vocational-technical educators in planning the direction of post-secondary vocational-technical education in the State for the next decade. This purpose was accomplished through a survey which emphasized the perceived degree of need and the perception of degree of impact on post-secondary vocational-technical curricula from selected technological, economic, programmatic, legislative, and sociological trends.A primary concern in the survey was to …

The Use Of The Holland Constructs, As Measured By The Act Assessment, To Predict College Persistence, Achievement, And Stability (Interests)., Raymond Gerszewski

Theses and Dissertations

This study examined the use of the Holland constructs, as measured by the ACT Assessment, in the prediction of college persistence, achievement, and stability. Specifically, this research measured the combined effects of expressed and inventoried Holland type, congruency, consistency, and differentiation; along with the predictors of sex, academic aptitude, and achievement, upon persistence, achievement, and stability. In addition, the relationship of the Holland constructs and these other predictors was examined.ACT Assessment records for a large sample of new, first-time freshmen (N = 1158) who entered the University of North Dakota in the Fall of 1978 were retrieved and matched with …

An Experimental Investigation Of Heat-Transfer To A Boiling Refrigerant In An Annulus, Daniel L. Ewert

Theses and Dissertations

No abstract provided.

Control And Other Stories, Marian G. Day

Theses and Dissertations

No abstract provided.

Technological Advancements In Industrial Robotics, Thomas A. Emerson

Theses and Dissertations

No abstract provided.

A Follow-Up Study Of University Of North Dakota Industrial Technology Graduates Of The Period 1973-1983, Bert M. Gumeringer

Theses and Dissertations

No abstract provided.

Natural Frequencies Of Captive Column Beams In Bending, William S. Heglund

Theses and Dissertations

No abstract provided.