Digital Commons Network^™

Morphological Evidence Of Apoptosis During Early Structural Luteolysis In The Golden Hamster, Matthew G. Friederichs

Theses and Dissertations

Structural luteolysis (SL) in the golden hamster (Mesocricetus auratus) is a remarkable event. The corpus luteum (CL) virtually disappears during a time span of 42 hours. SL begins around 0600 hours on day three of the cycle and is essentially complete by 2400 hours on day four of the cycle.

The purpose of this study was to determine when SL in the golden hamster actually begins and secondly to determine the way in which the three cell types involved in SL are depleted. The three cell types in question include luteal cells, endothelial cells, and neutrophils.

This study employed two …

Smoltification And Imprinting In Introduced, Land-Locked Chinook Salmon (Oncorhynchus Tshawytscha), Timothy L. Hoffnagle

Theses and Dissertations

The period of smoltification is crucial to the maintenance of a self-supporting salmon population. This study addresses the physiological and behavioral changes that occur during smoltification and the environmental cues which induce this metamorphosis in Chinook salmon (Oncorhynchus tshawytscha). The timing of imprinting in this species is also investigated.

The effects of novel water chemistry, increased stream flow rate, photoperiod and age and size on plasma levels of thyroxine, triiodothyronine and cortisol, hematocrit, condition factor and hepatosomatic index were examined. Exposure to a novel water source was found to induce smoltification while doubling the stream flow rate had no effect. …

Experimental Definition For Implantation Of The Afit Cortical Multielectrode Array, Adam G. Spenik

Theses and Dissertations

A two-dimensional multiplexed array of 256 electrodes (16 x 16) has been fabricated using conventional CMOS fabrication techniques. The size and spacing of the electrodes (160 x 160 µm squares with center-to-center spacing of 250 µm) approximate that of the cortical columns. The device is mounted on a small biocompatible package and a protocol to implant this package on the visual cortex of a ferret and a Rhesus monkey was developed and approved. An instrumentation setup to record the data from the device is described as well as the methods used to demultiplex the data. Testing of the device in …

An Analysis Of The Extent To Which Humor Is Accepted And Employed In The Workplace For The Enhancement Of Productivity And Creativity, Jonathan R. Specht, Paul D. Tobin

Theses and Dissertations

Today's business literature is filled with discussions of the many benefits humor can bring to the work environment. Two of these purported benefits, namely, the enhancement of workplace productivity and the enhancement of workplace creativity, have attracted the attention of modern managers challenged with keeping their organizations competitive despite dwindling financial and human resources. Unfortunately, little research has been done to date which actually demonstrates a link between the existence of workplace humor and improved levels of productivity and creativity. Without this demonstration of causality, most managers are reluctant to invest corporate resources in pursuit of workplace humor despite its …

Advanced Educational Methods In The Department Of Defense: Application Of Case Theory And Computer-Assisted Instruction To Business Process Reengineering, Brian A. Brown, Susan M. Brown, Karen L. Cook

Theses and Dissertations

The goal of this research was to create a computer-assisted instruction (CAI) prototype tutorial to teach the fundamental principles of integrated, computer-aided manufacturing definition activity modeling (IDEFO), a component of business process reengineering within the Department of Defense. To accomplish this, the authors evaluated current instructional material related to IDEFO, then adapted the material to a computerized learning environment using the Authorware Professional™ authoring software and a hybrid methodology which incorporated elements both of instructional design and software development. One of the most notable characteristics of this hybrid model was a series of iterations at each phase of development, which …

Characterization And Redesign Of The Afit Multielectrode Array, Richard G. Darenberg Jr.

Theses and Dissertations

Since 1978, faculty and graduate students from the Air Force Institute of Technology (AFIT) have been working on an implantable circuit array that can record visual signals from the brain or stimulate the brain. In the current design the circuit is a 16 x 16 array of pads, each pad being 160 x 160 micrometers with 250 micrometers spacing with an 'L' shaped reference pad used as a ground reference. The array is multiplexed so that only one I-O line is required to access all 256 pads. This research was twofold: first to analyze the existing circuit and identify sources …

Head Related Transfer Function Approximation Using Neural Networks, John K. Millhouse

Theses and Dissertations

This thesis determines whether an artificial neural network (ANN) can approximate the Armstrong Aerospace Medical Research Laboratories (AAMRL) head related transfer functions (HRTF) data obtained from research at AAMRL during the fall of 1988. The first test determines whether HRTF lends any support in sound localization when compared to no HRTF (Interaural Time Delay only). There is a statistically significant interaction between the location of the sound and whether the HRTF or no HRTF is used. When this interaction is removed using the alternate F.Value, the statistics give the result of equal means for the filters and azimuth. This means …

A Comparison Of Error Categorization Schemes For Use In Software System Safety Programs, Richard Escobedo, Jim Thomas

Theses and Dissertations

Software safety is becoming increasingly important in the development of DoD advanced weapon systems. To make software safer, hazard conditions must be avoided along with the errors that accompany them. The first step in identifying errors is classifying error data. The area of software error classification is not as advanced as other software development areas. The technical literature lacks examples of comprehensive taxonomies that can be applied to various computer software domains and applications. The predominant approach is to organize errors into categories particular to the program currently in work. The typical error scheme is made of narrow categories that …

Unification Of Larch And Z-Based Object Models To Support Algebraically-Based Design Refinement: The Z Perspective, Kathleen M. Wabiszewski

Theses and Dissertations

This research established a foundation for formalizing the evolution of based object models to theories, part of a dual approach for formally extending object-oriented analysis models using the Z and LARCH languages. For the initial phase, a comprehensive, consistent, and correct Z language parser was implemented within the SOFTWARE REFINERY™ Programming Environment. The Z parser produced abstract syntax trees (ASTs) of objects, thereby forming the basis for analyzing the similarities and differences between the based and LARCH-based object representations. The second phase used the analysis of the two languages to identify fundamental core constructs that consisted of similar syntactic and …

Design, Fabrication, Modeling, And Optical Characterization Of Organic Polymer Nonlinear Directional Couplers, John N. Berry

Theses and Dissertations

This research was an investigation into the suitability of a recently developed polymer, polyphenylene, as a material for integrated optical circuits (IOCs). Polymers show great promise in the area of IOCs because of material processing advantages, compatibility with most existing integrated circuit technology, and relatively strong nonlinear optical characteristics. This thesis contains an overview of: dielectric waveguides, linear and nonlinear directional coupler theory; various models useful in the design and analysis of optical waveguides; the fabrication of three different waveguide designs; the experimental apparatus and procedure used to optically characterize the waveguides; and the experimental results of the characterization. Waveguiding …

Empiricism, Anatomy, Reality: Reading Herman Melville In The Menippean Tradition., Francis Carter Kaplan

Theses and Dissertations

The purpose of the study is to draw together the art of Herman Melville, Menippean satire, and the empirical tradition in English and Scottish philosophy. Historical and biographical concerns serve as a background for exploring Melville's satire of Platonism, transcendentalism, and hermeneutic apriority. Nathaniel Hawthorne, Edgar Allan Poe, and Washington Irving are discussed in this respect. The dissertation also contains related fiction pieces.The dissertation develops several intertwined conceptions of analysis, drawing together an empirical critical basis derived from Ludwig Wittgenstein and "ordinary language philosophy," the notion of satire as criticism, and the exploration of these concepts through an examination of …

Reproductive Ecology Of Bighorn Sheep In Alpine And Desert Environments., Christine C. Hass

Theses and Dissertations

This study examines reproductive patterns of two herds of bighorn sheep (Ovis canadensis) in contrasting and extreme environments, to look at the range of variability that exists in certain reproductive traits. Desert bighorn sheep (O. c. nelsoni) were studied in the River Mountains of Nevada, an area characterized by hot, dry summers and mild winters. Rocky Mountain bighorn sheep (O. c. canadensis) were studied in the Pecos Wilderness of New Mexico, an area characterized by cool, wet summers and cold, snowy winters. The objective of the study was to determine lamb production and survival, lamb birth dates, and postnatal maternal …

The Relationship Between Parental Restrictions And The Occurrence Of Aggressive Behavior In Pre-Adolescent Males., Mary Kathryn Zielinski

Theses and Dissertations

Aggression is one of the most prevalent childhood behavior problems and makes up a large percentage of referrals to psychological clinics. Mental health professionals are likely to recommend that parents of aggressive children set firm rules for their children and that the parents be consistent in enforcing these rules. While this recommendation is suggested by research on parental discipline, there is a relative dearth of information on the relationship between the number of perceived parental rules, the perceived consistency of their enforcement, and the level of aggressive behavior in boys.This study attempted to confirm the importance of consistency in rule …

Modeling Trihalomethane Formation Potential From Wastewater Chlorination, Carol A. Mccormick

Theses and Dissertations

The deletion of federally mandated fecal coliform limits has led many states to review and modify their wastewater disinfection requirements. One issue in analyzing wastewater disinfection is the discharge of potentially carcinogenic halogenated organics formed during the chlorination process. This research investigates the formation of one class of the halogenated organics, the trihalomethanes. The applicability of using drinking water trihalomethane formation models for use with wastewater effluent is examined. Three models are compared for predictive capability by using measured trihalomethane values from previous research data. The results show that a previously developed model is applicable for use based on assumptions …

Developing An Emission Factor For Hazardous Air Pollutants For An F-16 Using Jp-8 Fuel, Donald J. Van Schaack

Theses and Dissertations

The 1990 Clean Air Act amendments drastically changed the legislation of hazardous air pollutants HAPs or air toxics. Title 3 of the act which specifically addresses HAPs now lists 189 substances which may require regulation as air toxics. Consequently, the reporting of HAP emissions from all Air Force operations will be required in the future. However, the Department of Defense DoD does not have methods available to report this information. This thesis develops emission factors for selected HAPs from an F-16 CD aircraft F110 engine operating on JP-8 fuel. The methodology included determining which HAPs should be selected, using past …

A Retrospective Quantitative Assessment Of Trichloroethylene Exposure Of Workers At Aircraft Maintenance Facilities At Hill Air Force Base Through The Use Of Modeling, Anthony O. Copeland

Theses and Dissertations

Monte Carlo simulation and source-receptor modeling are used to estimate the TCE exposures encountered by select workers at aircraft maintenance facilities at Hill Air Force Base between 1955 and 1979. An epidemiological study of this group, a retrospective cohort study of 14,457 workers who were employed at the base for a minimum of one year between 1952 and 1956, was headed by Dr. R. Spirtas of the National Cancer Institute to evaluate mortality associated with occupational exposure. One of the major conclusions of the study was that TCE 'probably does not pose a strong carcinogenic risk for man.' In the …

Evaluation Of Alternative Methods For Wastewater Disinfection, David C. Piech

Theses and Dissertations

This study investigated the alternative methods of wastewater disinfection. Areas of interest included methods of operation, ease of maintenance, and effectiveness for various types of wastewater. A literature search revealed three major disinfection options, which include chlorination dechlorination, ultraviolet light, and ozone. A questionnaire was sent to the active duty Air Force installations that operate wastewater treatment plants, requesting permit limitations and monthly averages for a variety of wastewater parameters. The majority of Air Force wastewater treatment plants use chlorine for disinfection. Using the data obtained from the questionnaire responses and established wastewater parameters from other research, the basic design …

Simulation Of Hydrologic Influences On Wetland Ecosystem Succession, Robert A. Pompilio

Theses and Dissertations

This research focuses on the development of a simulation model to determine the effects of hydrological influences on a wetland ecosystem. The model allows perturbations to the inputs of various wetland data which in turn, influences the successional development of the ecosystem. This research consisted of converting a grassland ecosystem model to one which simulates wetland conditions. The critical factor in determining the success of wetland creation is the hydrology of the system. There are four of the areas of the original model which are affected by the hydrology. The model measures the health or success of the ecosystem through …

A Preliminary System Dynamics Model Of A Constructed Wetland For The Mitigation Of Metals In Usaf Storm Water, Mark P. Smekrud

Theses and Dissertations

This thesis determines the potential removal and corresponding accumulation of trace metals from Air Force storm water in a constructed wetland through the use of a System Dynamics model. The goal is to determine whether constructed wetlands used as storm water best management practices provide efficient metal removal while creating only benign accumulations of such pollutants. Its purpose is to allow Base Civil Engineers and Environmental Managers a better tool to assess the long-term effects of a constructed wetland used as a storm water mitigation technique. The research is limited to the assessment of typical metal concentrations found in Air …

A Comparative Pharmacokinetic Study Of The Role Of Gender And Developmental Differences In Occupational And Environmental Exposure To Benzene, Elizabeth A. Brown

Theses and Dissertations

The purpose of this study is two-fold. First, it shows that physiological differences between men and women result in gender-specific exposures with respect to benzene. Second, it assesses the potential for a lactating woman's occupational and personal benzene exposure to impact a nursing infant's exposure, highlighting the possibility of subjecting an infant to the effects of industrial chemicals via breast feeding. This study employs physiologically based pharmacokinetic (PBPK) modeling to investigate the influence of physiological parameters and to evaluate the ability of inhaled benzene to transfer from mother to infant through breastmilk. The models are run through scenarios that simulate …

Volatile Organic Compound Emissions From Usaf Wastewater Treatment Plants In Ozone Nonattainment Areas, Brian A. Ouellette

Theses and Dissertations

In accordance with the 1990 Clean Air Act Amendments CAAA, this research conducts an evaluation of the potential emission of volatile organic compounds VOCs from selected Air Force wastewater treatment plants. Using a conservative mass balance analysis and process specific simulation models, volatile organic emission estimates are calculated for four individual facilities--Edwards AFB, Luke AFB, McGuire AFB, and McClellan AFB--which represent a cross section of the current inventory of USAF wastewater plants in ozone nonattainment areas. From these calculations, maximum facility emissions are determined which represent the upper limit for the potential VOC emissions from these wastewater plants. Based on …

Status Of Storm Water Pollution In The United States, Lynne A. Urquhart

Theses and Dissertations

The purpose of this study was to determine the status of storm water pollution in the United States Air Force. This is important since most AF bases are now required to have applied for a NPDES storm water permit. The objectives of the study were to: evaluate the sampling rates used at AF bases; determine the pollutants tested for by the AF bases; compare the pollutant concentrations of the AF bases to an EPA water quality standard; and determine if there were any trends in sampling or pollutant concentrations due to seasonal changes or across AF Commands or EPA Regions. …

An Evaluation Of The Educational Effectiveness Of A Relational Course Compared To Single Topic Courses Offered By The Management Department Of The United States Air Force, Kevin M. Kosefeski

Theses and Dissertations

This study compares the educational effectiveness of two different methods of teaching three senior-level management courses at the United States Air Force Academy. The first method, known as relational instruction, combined Management Information Systems MIS, Marketing, and Strategic Management into one three hour course worth nine credits. The team of instructors used a variety of delivery methods to present material. The second method of instruction employed single topic courses covering the same three topics as the relational course, taught by single instructors in one hour blocks using mostly lecture to deliver material. The literature review covered Blooms taxonomy of educational …

Response To The Loss Of A Romantic Relationship: Differences By Time Since The Loss, Gender, And Attachment Style, Charles J. Dahlstrom

Theses and Dissertations

No abstract provided.

Use Of Infrared Spectrometry To Determine The Effect Of Trichloroethylene Resident Time On Desorption Rates From Flint Clay, Peter T. Lapuma

Theses and Dissertations

This laboratory based thesis investigated the desorption rate of trichloroethylene (TCE) from flint clay while varying the resident time of TCE exposed to the clay. It is thought that in long contaminated soil, a majority of contaminant mass will become entrained within the interior of the soil particles to slowly desorb out of the soil over long periods of time. Recent studies suggest that the longer a contaminant is resident in soil, the longer the contaminant will take to desorb from the soil. To understand more about soil desorption, this experiment was developed using infrared spectroscopy to detect TCE vapor …

The Effect Of An Anaerobic Training Program Utilizing A Skating Treadmill On Anaerobic Performance, Lactate, And Other Metabolic Parameters, Trini T. Vargas

Theses and Dissertations

The adaptive physiological responses resulting from exercise training appear to be influenced by the specific character of the training program, type of exercise, and protocol employed to evaluate change. The effect of a unique six week anaerobic training program utilizing a skating treadmill was investigated. The anaerobic training program involved intermittent high intensity exercise bouts, each 4-90 seconds in duration at various treadmill speeds and elevations. The skating treadmill was designed specifically to enhance anaerobic metabolic pathways and anaerobic performance of hockey players by allowing the athlete to skate indoors on a rotating polyurethane surface that has the same friction …

"The Desire Of The Woman Which Is For The Desire Of The Man" Feminist Readings In Austen And Atwood, Mary M. Pringle

Theses and Dissertations

Three novels by Jane Austen are compared to three novels by Margaret Atwood in the context of reading and writing as feminist activities. Anna G. Jonasdottir's theoretical discussion of male authority supported by women's alienated love elaborates the apparent truth of W.B. Yeats's observation that "the desire of the woman ... is for the desire of the man," the thematic link between the three essays which focus on women's concerns regarding love, maternity, and professionalism. Austen and Atwood are presented as early and late forms of a bright, coherent, middle-class female subjectivity that has remained remarkably coherent over two centuries …

Stress And Its Correlates: An Empirical Investigation Among North Dakota Peace Officers, Eric Mark Anderson

Theses and Dissertations

The mission of the present investigation was to expand the limited body of knowledge regarding stress among rural peace officers. While a number of studies have focused on large, easily sampled departments, the empirical literature evidences neglect toward officers serving rural populations. The present study seeks to ascertain how North Dakota officers compare with other, more urban populations, and what differences may exist between a stratified sample of North Dakota police, sheriffs and Highway Patrol officers.

A randomized sample of 311 North Dakota officers were selected to receive a 300 question anonymous survey questionnaire which assessed personal demographic information in …

A Case Study Of Interactions With Multicultural Literature In A College Freshman English Classroom, Joan Whitchurch Kopperud

Theses and Dissertations

This paper considers the perceptions and interactions of a teacher and students in a college freshman English course. The researcher examined how multicultural literature was incorporated into that course and how students responded to the selections and classroom activities.

The study followed an inductive methodology; that is, abstractions were based upon observations and experiences from the participants rather than deduced from prior theories. Classroom observations, in-depth interviews, and course written documents provided data for analysis.

Based on this study’s data collection and analysis, three themes emerged: First, the teacher’s authenticity as a person and teacher contributed to a meaningful learning …

Analysis Of The Potential For Plant Uptake Of Trichloroethylene And An Assessment Of The Relative Risk From Different Crop Types, Roy-Alan C. Agustin

Theses and Dissertations

This research expands our limited knowledge on the influence of plants on the fate and effects of trichloroethylene (TCE), providing a screening tool on which to base decisions regarding the need for actual sampling of plants. First, physicochemical properties of TCE--vapor pressure, Henry's Law constant, water solubility, octanol-water partition coefficient, molecular weight, and half-life--were screened against relationships reported in literature to evaluate TCE plant uptake potential. This screening approach indicated TCE may be transferred to plants via retention by root surfaces, root uptake and translocation, and foliar uptake. Next, the PLANTX model developed by Trapp and others was applied to …