Digital Commons Network^™

A Sensitivity Analysis Of Circular Error Probable Approximation Techniques, Peter Puhek

Theses and Dissertations

Several algebraic CEP estimates models were examined in this study. Each assumes that the crossrange and downrange miss distances of the sample data follow a bivariate normal distribution. The analysis determined the sensitivities of these models to changes in the parameters of sample size, bias, correlation, and ellipticity. The accuracy of each model is expressed in terms of relative error, and the parameter regions in which a certain method dominated as the most accurate were noted. In general, it was found that bias was the most significant parameter in determining the best CEP method. A simple method, based on the …

Spartan: An Instructional High Resolution Land Combat Model, David K. Cox

Theses and Dissertations

This project developed an instructional high resolution land combat simulation model. The purpose of this model is to demonstrate common techniques of modeling used in the present generation of US Army land combat models. This model is stochastic and uses an event scheduling type of discrete event time algorithm. The model represents a maximum of two six-man infantry squads in direct fire combat. The individual soldiers move, search for targets, engage targets, and react to hostile encounters. The data values provided will the model are all. generic and hypothetical. The model is only intended as a demonstration tool and has …

Gettysburg: An Analysis Of The Training Value Of Commercial Models, Jude C. Fernan

Theses and Dissertations

This study investigated the possibilities of using commercial combat models/war games dealing with the battle of Gettysburg as aids for the training of soldiers and leaders in the military. With the downsizing of the military and the high cost of training, there exists a need to reduce training costs while not affecting the quality of training. The military employs various military models to assist in training but has yet to fully tap the wealth of commercial combat models. One reason may be the lack of an investigative analysis into the soundness and applicability of commercial combat models to military training. …

A Decision-Theoretic Approach To Recommending Action In The Air-To- Ground Aircraft Of The Future, Garrison H. Flemings

Theses and Dissertations

Designers of air-to-ground fighters of the future should consider including decision support systems to relieve pilots of some of the present workload. Those decision support systems should use utility theory. This work reviews two techniques of utility theory (decision trees and influence diagrams) and a new technique due to Morlan (probability ratio nets). The work includes a proposed structure for action recommendation systems in air-to-ground fighters of the future. The work describes an implementation of probability ratio nets. The work demonstrates the value of decision theory to air-to-ground fighters of the future by way of solving an example problem and …

Saber: Airland Combat Training Model Credibility Assessment And Methodology, David L. Scagliola

Theses and Dissertations

Saber is a theater-level, airland combat training model, designed by a number of computer science and engineering students and faculty at the Air Force Institute of Technology (AFIT). Saber is intended to replace the Agile model, which is currently used at the Air Force Wargaming Center, Maxwell AFB, Alabama for Theater Warfare Exercise (TWX) training purposes. This thesis focuses on the progress made towards generating the Saber training model, its ability to meet the objectives specified by the Wargaming Center, and its ability to represent actual combat. Specifically, this thesis is directed towards characterizing, establishing a credibility assessment, and developing …

A Response Surface Methodology Study Of Ferroelectric Memory Devices, Kevin C. Smith

Theses and Dissertations

Fatigue in ferroelectric memory devices was studied. The application of fatigue pulses to a ferroelectric sample was controlled by the RT-66 Ferroelectric Tester, a variation of the Sawyer-Tower circuit. The RT-66 also controlled data collection following the fatiguing process. Seven variables were evaluated for their potential- affect on fatigue. A sequence of fatigue tests, which varied the settings of these variables, was developed using Response Surface Methodology (RSM) experimental designs. Least-squares regression models were developed once a particular RSM set of design experiments was completed. These models were evaluated using RSM tools, and the analysis of these models allowed the …

Person-Centered And Dialogical Counseling: A Comparative Study., Rand Ziemke Rasmussen

Theses and Dissertations

Carl R. Rogers' Person-Centered philosophy and Martin Buber's Dialogical philosophy are often compared with one another. Some scholars conclude that they are merely variations on a theme, while others conclude that they represent two entirely separate world-views. With the advent of Dialogical counseling this debate is brought into the discipline of counseling. The purpose of this study is to continue this debate in the discipline of mental health counseling.The current study is an interpretive inquiry into the similarities and differences of Person-Centered and Dialogical counseling. Utilizing the written works of Buber and Rogers, the written work of counselors who identify …

A Study Of Perceived Stress And Reported Health Problems: Relationships To Other Variables Among Secondary School Principals Of Minnesota., Jerold Everett Horgen

Theses and Dissertations

The purposes of the study were (1) to determine if a relationship exists among reported stress and health problems among Minnesota secondary school administrators, (2) to determine what variables correlate with reported stress and health problems, and (3) to recommend behaviors which would contribute to a healthy lifestyle.In 1989 Minnesota had 431 school districts with K-12 programs. This dissertation focused on the secondary school principalship. The secondary school principals surveyed included senior high principals, assistant senior high principals, junior high principals, middle school principals, and assistant junior high/middle school principals. There were 537 total surveys sent out and 405 returned …

Low-Dosage Magnetic Field Effects On Embryonic Bone Growth., Vikki Lynn Mccleary B.

Theses and Dissertations

Pulsed electromagnetic fields (EMF) and electric fields have been demonstrated to promote osteogenesis and wound healing. Pulsed EMF's have been approved since 1979 by the FDA, and are highly effective in the treatment of non-union fractures. Increased linear growth, cellular proliferation, cAMP and uptake of tritiated thymidine have been documented on short term exposure. Yet the mechanisms have been difficult to quantify. Little has been published in the literature about the effects of a magnetic fields upon bone growth. Parkinson (1985) indicated a system at rest has no magnetic force acting upon and movement due to thermal energy is small …

A Study Of The Relationship Of Maternal And Child Risk Factors To Development And Low-Income Status In Grand Forks County., Kay Elizabeth Campbell

Theses and Dissertations

The purpose of this study was to investigate the correlation between maternal and child risk factors and the variables of development, low-income status, and multiple births. The sample consisted of 193 children referred to the North Dakota Early Childhood Tracking System in Grand Forks County from 1988 to mid-1991. The referral criteria were based on established, biological, and environmental risk factors. The correlation between development and risk factors was not significant. Low-income status was significantly correlated to maternal risk factors (p $<$.001), short term respiratory problems (p $<$.05), neonatal risk factors (p $<$.05), and single parenthood (p $<$.001). Multiple births were significantly correlated to neonatal risk factors (p $<$.05) and prematurity (p $<$.001).

An Examination Of Wing Rock For The F-15, Michael T. Davison

Theses and Dissertations

Wing rock in the F-15 was examined both analytically and experimentally. Using a previously developed model for the F-15, bifurcation analysis and continuation techniques were used to map out the periodic wing rock solutions and the equilibrium solutions leading up to wing rock. this was done for four maneuvers; a 1 g stall, rudder sweeps, constant bank turns and a symmetric pullup. To supplement this research, time history simulations were used to examine. the time history of wing rock. A study of stability derivatives was also done, to determine the critical parameters in wing rock. Bifurcation was also used to …

A Computer Based Educational Aid For The Instruction Of Combat Modeling, Richard S. Moore

Theses and Dissertations

The Air Force Institute of Technology is one of few institutions that teaches combat modeling. Combat models are typically dynamic computer simulations of specialized dynamic processes. Great difficulty exists in portraying these dynamic and recurrent processes with conventional static diagrams. This thesis produced a computer-based instructional aid which presents animated examples of processes common to combat models, demonstrates a simple few-on-few aerial combat model, and encourages student exploration and interaction with these presentations. This aid provides dynamic examples of random number generation, detection processes, target selection, and target destruction. A complete combat model demonstrating a few-on-few air duel is animated …

Spousal Bereavement In The Second Year: Differences In Bereavement Outcome Among The Rural And Urban Elderly., Laurie Ann Brustad

Theses and Dissertations

Twenty-five bereaved rural elderly subjects (10 males, 15 females) were compared with twenty-five bereaved urban elderly subjects (16 females, 9 males) in the second year after the death of a spouse. All subjects were drawn from a Hospice population. The rural elderly were found to have higher levels of depression, unresolved grief, and poorer health than the urban elderly as measured by the Multiscore Depression Inventory, the Beck Depression Inventory, the Wahler Physical Symptoms Inventory, and the Texas Revised Inventory of Grief. Multiple regression analyses revealed that several variables influenced scores on the outcome measures. Depression scores were best predicted …

A Study Of African American Women And Their Perceptions Of Life In Utah, Jennifer Caye Demayo

Theses and Dissertations

The purpose of this study was to examine, through the use of the ethnographic interview (Spradley, 1979), residential preferences, as well as the stated reasons for relocation of African American women who live in a predominantly White, Utah Mormon culture. The "push and pull" factors that impacted the women's decisions to come to and/or remain in Utah were qualitatively analyzed in some detail. The end goal of the research was to determine whether Utah was perceived as a desirable residence by and for African American women.

Residential preference is a complex issue which requires an in depth explanation. The prominent …

Aberrant Mormon Settlers: The Homesteaders Of Highland, Utah, David T. Durfey

Theses and Dissertations

This thesis is a history of the original thirty-seven homesteaders of Highland, Utah. It covers a period of about twenty-five years, 1875-1900. The study provides an example of a aberrant community which was not established in the same, distinctive style of settlement as the typical Mormon village. In addition it describes the relationship between the original residents and non-residents of Highland with the surrounding villages of Lehi, American Fork, and Alpine.

Amy Brown Lyman And Social Service Work In The Relief Society, David Roy Hall

Theses and Dissertations

This thesis examines the life and accomplishments of Amy Brown Lyman, particularly as they relate to charity activities and social service work of the Relief Society of the Church of Jesus Christ of Latter-day Saints. It considers her early life, her call to the General Board in 1909, her contributions to the creation of the Relief Society Social Services Department in 1919, her association with national and international leaders of reform, and her efforts in sponsoring and supporting social welfare legislation in Utah. Also examined are her work with the Social Services Department during the Great Depression, her mission to …

The Geographical Landscape Of Tabernacles In The Mormon Culture Region, Crystal Wride Jenson

Theses and Dissertations

Although tabernacles do not hold the sacred meaning of Mormon temples, they are symbolic landmarks of the culture of the early Mormon Saints. Tabernacles were once an integral part of each community in which they were located. They were often the main buildings in the community, reflecting the coherent, orderly nature of a Mormon town. Today, many of the original tabernacles have been torn down and others are under the threat of destruction.

The first tabernacles built in the Mormon Culture Region were constructed in the 1850s. They were large meetinghouses built for the purpose of holding large general meetings. …

Overproduction Of The E Protein Of Bacteriophage Øx174, Mohan U. Shenoy

Theses and Dissertations

No abstract provided.

Sequence Specificity Of Teniposide-Induced Deletion And Insertion Mutations At The Aprt Locus Of Chinese Hamster Cells, Yi-Hong Han

Theses and Dissertations

Previous studies suggested that teniposide is a strong clastogen, and that the DNA breakage effect of this drug is mediated by the nuclear enzyme topoisomerase II. Ripley et al found evidence for a correspondence between sites of acridine-induced frameshift mutations in bacteriophage T4 and sites of in Vitro DNA cleavage by T4 topoisomerase II. To identify the sequence specificity of teniposide-induced deletion and insertion mutations in mammalian cells, the CHO-D422 cell line, which is hemizygous at the aprt locus, was employed in this study. Sixty-eight teniposide-induced and 42 spontaneous aprt mutants were analyzed at the DNA sequence level. Compared with …

I Have Kept My Heart Yellow: Stories, Eileen A. Joy

Theses and Dissertations

A thesis submitted in partial fulfillment of the requirement for the degree of Master of Fine Arts in Creative Writing at Virginia Commonwealth University.

The Effect Of Body Position Changes On Arterial Oxygen Saturation In Obesity As Measured Noninvasively By Pulse Oximetry, Anna Marie Angela Klosterman

Theses and Dissertations

This study utilized a quasi-experimental pretest-posttest design that compared the effect of body position changes on arterial oxygen saturation in obesity as measured noninvasively by pulse oximetry. The null hypothesis, that there would be no difference between oxygen saturation values measured by pulse oximetry with position change from sitting to supine in obese subjects as compared to nonobese subjects, was tested. Fourteen obese, American Society of Anesthesiologist (ASA) physical class status II subjects and 14 nonobese ASA physical class status I subjects were included in the sample population. Thirteen of the obese subjects were further classified as morbidly obese. After …

Evaluation Of Quantitative Electroencephalography For Assessment Of Central Nervous System Stimulant Response, Patricia W. Slattum

Theses and Dissertations

The objective of this investigation was to evaluate quantitative electroencephalography (EEG) as a measure of CNS stimulation. The reproducibility and sensitivity of quantitative EEG was compared to neuroendocrine, mood, and psychomotor performance measures.

The study was conducted in two parts. The first part investigated the inter- and intra-individual variability associated with a series of pharmacological response measures under baseline (no drug) conditions. It was an open-label pilot study in which eight healthy male volunteers underwent a series of tests (EEG, visual continuous performance task (CPT), a finger tapping task, and self-rated mood scales) repeated eight times over a 12 hour …

Evidence That Nicotine Can Acutely Desensitize Central Nicotinic Cholinergic Receptors In Vivo, John Randolph James

Theses and Dissertations

Current concepts concerning nicotine's central nervous system (CNS) mechanism(s) of action suggest that this drug is producing its effects via an interaction at nicotiniccholinergic receptors (nAChRs) which open a membrane cation channel. Following initial opening of the channel, nicotine appears to induce a rapid desensitization of the nAChRs, closing the channel and resulting in a cessation of nicotine's effects. Research presented here will provide evidence of this secondary desensitization process in vivo by demonstrating nicotine's ability to induce acute tolerance in the discriminative stimulus (DS) paradigm. The ability of nicotine to elicit DS control of behavior was significantly reduced via …

An Analysis Of The Values Influencing Neonatal Nurses' Perceptions And Behaviors In Selected Ethical Dilemmas, Deborah A. Raines

Theses and Dissertations

The purpose of this research was to identify the values influencing the nurse's perception and choice of behavior in a hypothetical clinical situation. The theoretical framework was Rokeach's (1973) Theory on the Nature of Human Values and Value Systems. A descriptive study using a mailed survey was conducted on a random sample of 331 members of the National Association of Neonatal Nurses. Data on individual nurses' values, perception of information and behavioral choices were collected with an investigator developed questionnaire, consisting of a values scale (alpha =.82) and an information scale and choice alternatives related to three hypothetical vignettes: a …

If We Remain Forever Here, Jeffrey Bjorn Falla

Theses and Dissertations

No abstract provided.

Communicative Ability In Head Injured Children, Patricia M. Fast

Theses and Dissertations

No abstract provided.

Denitrification In The Elk Valley Aquifer, Northeastern North Dakota, Gale G. Mayer

Theses and Dissertations

Biological denitrification controls nitrate distribution in the Elk Valley aquifer, which underlies approximately 725 square kilometres of northeastern North Dakota and provides drinking water for farms and rural communities in the area. Increased irrigation has raised concerns over potential contamination from agricultural practices. The purpose of this study was to establish the role of biological denitrification in minimizing concentration and distribution of nitrate and to determine the effect irrigation practices have on groundwater flow and nitrate distribution in the saturated zone.

The aquifer is unconfined and consists of up to 20 metres of glacial outwash and deltaic shale-rich sand deposits. …

The Stratigraphy And Sedimentology Of The Sentinel Butte Formation (Paleocene) In South-Central Williams County, North Dakota, Wesley D. Peck

Theses and Dissertations

Approximately 163 meters (535 feet) of the Paleocene Sentinel Butte Formation crop out in southcentral Williams county, North Dakota. To determine their mode of deposition and stratigraphic position within the formation, twelve stratigraphic sections were measured. These strata were deposited in alternating fluvial and lacustrine environments as determined by sedimentary structures, lithology, lithologic sequences, and fossil occurrences. A fining upward trend in grain size of the tabular sandstones, and the identification of epsilon cross-stratification in the tabular sandstones support a fluvial origin for some of the strata. The strongest evidence for the interpretation of lacustrine deposition is the presence of …

An Historical Approach To The Study Of The English Language : A Six Week Educational Unit In The Secondary English Curriculum, Peggy L. Johnson

Theses and Dissertations

No abstract provided.

Effect Of An In-School Farm Injury Prevention Program On Farm Safety Practices And Attitudes Of Rural Farm Families, Colleen J. Holzwarth

Theses and Dissertations

No abstract provided.