Digital Commons Network^™

Personality Traits And Addiction Relapse Rates: Is There A Connection?, Lori Sadwin O'Leary

Theses and Dissertations

The purpose of this study was to examine what differences, if any, there were in personality trait levels of Neuroticism and Conscientiousness between addicts/ alcoholics who relapsed and those who remained abstinent. It was hypothesized that high levels of Neuroticism combined with low levels of Conscientiousness would be associated with relapsing addicts and low levels of Neuroticism combined with high levels of Conscientiousness would be associated with abstaining addicts. Fifty-one subjects participated in this study and their personality traits were measured with the NEO-FFI, a self-reporting personality questionnaire. Relapse and abstinence were observed over a three-month period. A one-way ANOVA …

Gender Differences In Mathematics Anxiety And Achievement: Grades 4-8, Juliet H. Mcginley

Theses and Dissertations

The purpose of this study was to investigate gender differences in mathematics anxiety as it is related to mathematics achievement. It was expected that there would not be a gender difference in mathematics achievement, but that there would be a gender difference in math anxiety. Specifically, it was expected that females would have a higher math anxiety than males, and that this difference would magnify in the higher grades. The participants were 250 students in grades 4-8 from a Catholic elementary school in a middle-class suburb in Southern New Jersey. Prior to their mathematics midterm examination, the participants completed the …

Gender Identity And Course Selection, Michele Nasife-Brown

Theses and Dissertations

Differences between males and females in cognitive skills during adolescence are trivial, but despite this absence of differences females are less likely to pursue advanced courses in math and science, and those who do are more likely to drop out before finishing. This has implications, because some females may have personality characteristics that lead them away from stereotypical careers. The consensus of the research is that females are not encouraged to pursue careers in math and science because they are seen as masculine careers. This study examined gender identity and how it correlates with academic major and career choice in …

The Effects Of Block Scheduling On Students With Special Needs, Kimberly C. Seifring

Theses and Dissertations

This study surveyed the professionals from two schools in the southern New Jersey area regarding their views of block scheduling as well as their views on the effectiveness of block scheduling among students with special needs. A total of 243 surveys were distributed and 61 were returned. The survey questioned the teachers in regards to the changes they had to incorporate into their daily instructional time upon switching to block scheduling, the advantages and disadvantages of block scheduling, and how to ensure that students with special needs experience success while participating in a block schedule. A majority of the participants …

Motivation Among Students With Learning Disabilities, April H. Conti

Theses and Dissertations

The purpose of this study was to examine whether intrinsic motivation is a major factor in explaining academic performance deficits in children with learning disabilities. Harter's Scale of Intrinsic Versus Extrinsic Orientation in the Classroom was given to 34 students with learning disabilities and 36 students without learning disabilities from Grades 4 to 6 from a suburban, middle-class school district located in Southeastern New Jersey. It was proposed that students with learning disabilities were less intrinsically motivated than students without identified learning disabilities. However, the general pattern of results derived from a T-Test for Independent Samples did not show a …

N-3 Essential Fatty Acids Intake And Depressive Symptoms, Nami Matsumura

Theses and Dissertations

The purpose of this study was to examine whether N-3 fatty acids intake would correlate with a prevalence of mental distresses. The present study consisted of a comprehensive literature review and analysis of preexisting data that were relevant to this study. Two data were primarily used in the assessment. These were the 1994 study of Media and Markets by Simmons Market Research Bureau, Inc. for food intakes, and the report of the Behavioral Risk Factor Surveillance System (BRFSS) for the prevalence of Frequent Mental Distress. Due to incompatibility of those two studies additional data- the U.S. population estimates for regions …

The Effect Of A Student Assessment Instrument In The Performance Of Basic Skills Mathematics Students At The Community College Level, Matthew Flacche

Theses and Dissertations

This study was conducted to see if implementation of a self-assessing instrument improved students' test scores when compared to no mid-unit assessment at all. The experiment involved basic skills mathematics students from Camden County College in Blackwood, New Jersey. Two Math Skills III (Elementary Algebra) classes, containing a total of 39 students, were included in the study. Both sections of students completed pretests. The students in both classes received similar instruction, however one class (the treatment group) received three weeks of instruction, completed and graded Student Assessment Instruments (SAI's) approximately every other class (during the instruction), and took a unit …

Development Of A World Wide Web Site For The Occupational Safety And Environment Health Program In The Industrial Technology Department At The University Of North Dakota, Zachary D. Knoop

Theses and Dissertations

No abstract provided.

Facing The Monster: Responses Of North Dakota Higher Education Leaders To The Potential Impact Of Declining Public School Enrollment On The State's University System, Jane L. Schulz

Theses and Dissertations

This study was designed to examine the perceptions of leaders of higher education in North Dakota regarding declining public school enrollment and its potential impact on higher education in the state. Educational leaders from three higher education institutions of differing types and other state policymakers were interviewed to determine their responses to the phenomenon of enrollment decline, the impact foreseen on higher education, and the planning activities used or being considered for use in preparation for the possible impact.

Data were gathered from open-ended interviews and through examination of planning documents of institutions and the North Dakota University System. A …

Certified Athletic Trainers' Perceptions Of Gender Equity And Barriers To Advancement In Selected Practice Settings, Cynthia L. Booth

Theses and Dissertations

The purpose of this study was to determine if gender and/or practice setting were related to certified athletic trainers' perceptions of gender equity and specifically to barriers to professional advancement by women. This study was used to examine the perceptions of gender equity as viewed by NATA-certified athletic trainers of both genders working in three different practice settings: the secondary school setting, the college/university setting, and the clinical/hospital setting. A total of 600 individuals were selected for the sample, 100 each of men and women from each of the three settings.

The findings of this study revealed that perceptions of …

Codependency Among Nurses: A Rural Urban Comparison, Nancy Carlson

Theses and Dissertations

This descriptive study was undertaken to examine the role of environmental work stressors and family-of-origin dysfunction in the gensis of professional codependency and compare rural and urban samples of nurses using those parameters. The nursing literature presents us with two contradictory explanations of the relation between codependency and nursing. Some see it emerge when a nurse’s wish to care for others is motivated by attempts to fulfill her or his own unmet needs from dysfuctional family experience. Others see the medical institutional expectation of devotion and self-sacrifice by nurses as a causal factor in codependency. Both interpretations are based on …

Perceived Effectiveness Of Portfolio Assessment For Pre-First And First Grade Teachers In Pemberton Township School District, Ursula M. Csercsevits

Theses and Dissertations

The purpose of this study is to discover the effects of portfolio assessment as perceived by pre-first and first grade teachers using community based action research. The outcome of this study is data that assists in evaluating the continued use of portfolio assessment as it exists, or determining the need for adjustment to the practice. The sample group consisted of forty-two pre-first and first grade teachers currently using portfolio assessment. Data collection of this action research study began with a questionnaire distributed to all members of the sample. The cycle of research continued with interviews, classroom observations and a review …

An Analysis Of The Effectiveness Of A Constructive Induction-Based Virus Detection Prototype, Kevin T. Damp

Theses and Dissertations

Computer viruses remain a tangible threat to systems both within the Department of Defense and throughout the greater international data communications infrastructure on which the DoD increasingly depends. This threat is exacerbated continually, as new viruses are introduced at an alarming rate by the growing collection of connected machines and their operators. Unfortunately, current antivirus solutions are ill-equipped to address these issues in the long term. This thesis documents an investigation into the use of constructive induction, a form of machine learning, as a supplemental antivirus technique theoretically capable of detecting previously unknown viruses through generalized decision-making techniques. A group …

Robust Multi-Scenario Optimization Of An Air Expeditionary Force Force Structure Applying Genetic Algorithms To The Combat Forces Assessment Model, Barry D. Bennett Jr.

Theses and Dissertations

The United States Air Force is increasingly facing more diverse threat situations while existing force structure levels are being reduced and proposed compositions are being severely scrutinized for relevance, affordability, and effectiveness. Military planners are struggling with the question of how to generate a single force structure that can adequately respond to a multitude of threat scenarios in an uncertain future while at the same time being tasked to prove just how effective their choice will be. In the past, modeling has been effective in showing how a force can respond to a single threat scenario but a new modeling …

Realtime Color Stereovision Processing, Byron P. Formwalt

Theses and Dissertations

Recent developments in aviation have made micro air vehicles (MAVs) a reality. These featherweight palm-sized radio-controlled flying saucers embody the future of air-to-ground combat. No one has ever successfully implemented an autonomous control system for MAVs. Because MAVs are physically small with limited energy supplies, video signals offer superiority over radar for navigational applications. This research takes a step forward in real time machine vision processing. It investigates techniques for implementing a real time stereovision processing system using two miniature color cameras. The effects of poor-quality optics are overcome by a robust algorithm, which operates in real time and achieves …

Feature Selection For Predicting Pilot Mental Workload, Julia A. East

Theses and Dissertations

Advances in technology have the cockpits of the aircraft in the Air Force inventory increasingly complex. Consequently, mental demands on the pilot have risen. In some cases, mental demands were so overwhelming that pilots have forgotten basic flying techniques, such as G-straining maneuvers. The results have been fatal. Recent research in this area has involved collecting psychophysiological features, such as electroencephalography (EEG), heart, eye and respiration measures, in an attempt to identify pilot mental workload. This thesis focuses on feature selection and reduction of the psycophysiological features and subsequent classification of pilot mental workload on multiple subjects over multiple days. …

In Situ Treatment Of Chlorinated Ethene-Contaminated Groundwater Using Horizontal Flow Treatment Wells, Derek R. Ferland

Theses and Dissertations

The limitations of conventional containment technologies for groundwater contaminated with chlorinated solvents have motivated development of innovative technologies to achieve national groundwater remediation objectives. One inn9vative technology that is currently under development involves metal reductants or catalysts to chemically destroy the dissolved chlorinated solvent. Models are important tools that can be used to help transition this technology to the field. Model studies can be used to gain understanding about the technology, help determine when the prospective technology might work for a given site, and design full-scale field applications.

An Object-Oriented Approach To The Modeling And Visualization Of Breast Cancer Tumors, Bruce C. Jenkins

Theses and Dissertations

Great strides have been made in controlling the progression of breast cancer, but medical professionals continue to rely primarily upon traditional mammography for early detection. Enhancing breast cancer detection capabilities - and thus reducing tumor detection time - should result in a reduction in mortality rates. The detection capabilities of mammography may be enhanced through improved modeling and visualization techniques. This thesis is an extension of initial research conducted at the Air Force Institute of Technology. Previous efforts focused on developing a mathematical model for simulating the growth of cancer within unconstrained 3-dimensional space. The research also explored the behavior …

Toxicity Of Tolyltriazole To Bacillus Microorganisms, Christopher J. Leonard

Theses and Dissertations

The safety of air travel in cold weather depends upon the use of aircraft deicing fluids (ADAF). The environmental and toxic effects of the ADAF component tolyltriazole are not well understood. Tolyltriazole is a potential human carcinogen and has exhibited microbial toxicity in Microtox test. This research used two methods to investigate the toxicity of tolyltriazole on bacillus shaped microorganisms. The first method compared the dissolved oxygen uptake of microcosms exposed to varying concentrations of tolyltriazole. When exposed to 1000 ppm tolyltriazole, all isolated species showed inhibition in respiration. There was no evidence that tolyltriazole at

Toxicity Of Tolyltriazole To Gram-Positive Coccus Microorganisms, Heather L. Mitchell

Theses and Dissertations

Maintaining safe flight operations, military and civilian, in cold weather requires the use of de-icing fluids. Glycols, the primary component of de-icers, have been extensively studied. Water and additives such as corrosion inhibitors and other performance enhancing chemicals make up the remaining portion of de-icing fluids. Little research has been conducted on the additives, but several are suspected toxins to microorganisms, therefore the EPA regulates the disposal of spent de-icing fluids. Tolyltriazole, a corrosion inhibitor found in de-icing fluids, is a suspected human carcinogen. It is also known to be moderately toxic to microorganisms based on Microtox results. The purpose …

A Pharmacokinetic Study Of The Effects Of Stress On Chemical Exposure, Sierra H. Suhajda

Theses and Dissertations

Following the Gulf War there were many concerns raised about human exposure to the combination of chemicals and stress. Stress causes several changes in basic functions of a human body, from breathing and blood flow changes to hormonal and enzyme changes, and increased permeability of the blood-brain barrier. Each of these changes can strongly influence chemical uptake, distribution, and accumulation in the body. The purpose of this thesis was to model and predict the changes that will occur when stress is combined with chemical exposure. Physiologically-based pharmacokinetic (PBPK) modeling is one tool that can be used to visualize, predict, and …

Modeling The Effect Of Nonlinear And Rate-Limited Sorption On The Natural Attenuation Of Chlorinated Ethenes, Peter P. Feng

Theses and Dissertations

Chlorinated solvents like tetrachloroethene (PCE) and trichloroethene (TCE) are the most common detected groundwater contaminants at Department of Defense installations in the United States. Unfortunately, technologies conventionally used to remediate chlorinated solvent-contaminated groundwater often fall short of achieving regulatory goals. Natural attenuation of chlorinated solvents offers an alternative remediation strategy that may achieve goals. However, the processes involved with natural attenuation are not fully understood, and this lack of understanding has hindered acceptance of natural attenuation by regulatory agencies. This study involved use of a numerical model that incorporated the physical, chemical, and biological processes thought to be relevant to …

Using Rsm, Doe, And Linear Regression To Develop A Metamodel To Predict Cargo Delivery Of A Time Phase Force Deployment Document, Kenneth S. Browne

Theses and Dissertations

Air Mobility Command (AMC) uses the Airlift Flow Model as their primary tool to estimate the amount of cargo delivered in a Time Phase Force Deployment Document (TPFDD). The primary objective of this research was an exploratory investigation in the development of a metamodel to predict the amount of cargo delivered from a TPFDD by AMC into a theater. In creating a valid metamodel the analyst would be able to quickly provide the decision-maker with accurate insights should input parameters change. This would save valuable time and replace the need to physically change the input parameters and re-run the simulation. …

A Neural Network Solution To Predicting Wind Speed At Cape Canaveral’S Atlas Launch Pad, Kenneth P. Cloys

Theses and Dissertations

This thesis demonstrates the potential for using time-delay neural networks to provide Launch Weather Officers (LWOs) at 45th Weather Squadron (45 WS) with advance warning of wintertime (November-March) peak wind speeds at the Atlas launch pad. The 45 WS provides weather support to the United States space program at Cape Canaveral Air Station, NASA's Kennedy Space Center, and Patrick Air Force Base. Due to the complex wintertime environment produced by the effects of friction and instability, 45 WS LWOs consider wintertime launch pad winds their toughest forecast challenge. Neural networks were developed, trained, and tested using observations of wintertime peak …

Effects Of Moisture Content In Solid Waste Landfills, Craig P. Eck

Theses and Dissertations

Solid waste landfills are an extremely complex and heterogeneous environment. Modeling the biodegradation processes within a landfill must involve an understanding of how environmental factors affect these processes. Arguably, the most important environmental factor influencing biodegradation processes is solid waste moisture content. This research effort, which is an extension of a system dynamics model previously presented by Colborn (1997) and amended by Benter (1999), attempts to understand and model the effects of moisture content on waste degradation and landfill gas generation. The new moisture structure that was added to the previous models provides a better representation of the impact of …

Chromium Concentration Bias In The Particle Size Distribution Of Primer Overspray, Joseph M. Fox

Theses and Dissertations

Air Force aircraft-painting operations create clouds of paint overspray that contain strontium chromate, a confirmed carcinogen, which poses an exposure hazard to painters. It is often assumed that all particles in paint overspray have the same chemical composition as the original paint mixture, however differences in composition may occur in various particle sizes. Because particle size affects where in the respiratory system a particle deposits, actual exposures to a specific chemical may vary. Paint particles greater than 2.5 µm are deposited in the upper respiratory system and will be eliminated by physiological removal mechanisms. Particles less than 2.5 µm will …

A Distributed Agent Architecture For A Computer Virus Immune System, Paul K. Harmer

Theses and Dissertations

Information superiority is identified as an Air Force core competency and is recognized as a key enabler for the success of future missions. Information protection and information assurance are vital components required for achieving superiority in the Infosphere, but these goals are threatened by the exponential birth rate of new computer viruses. The increased global interconnectivity that is empowering advanced information systems is also increasing the spread of malicious code and current anti-virus solutions are quickly becoming overwhelmed by the burden of capturing and classifying new viral stains. To overcome this problem, a distributed computer virus immune system (CVIS) based …

Modeling Chlorinated Ethene Removal In Constructed Wetlands: A System Dynamics Approach, Colby D. Hoefar

Theses and Dissertations

The purpose of this study is to gain understanding of the dynamics of the processes that degrade Perchloroethene (PCE) to ethylene, or carbon dioxide (CO₂), within the confines of a constructed wetland. A system dynamics approach will be used. This model is focused on identifying and optimizing the naturally occurring processes in stratified wetland sediment that reduce mass, toxicity, mobility, volume or concentration of contaminants in groundwater. Contaminant fate and transport within a wetland system is extremely complex and the mechanisms that drive wetland behavior are dynamic. Confidence in the model was built through verification and testing. Reasonable …

Chromate Dissociation From Primer Paint In Simulated Lung Fluid, Tiffany J. R. Morgan

Theses and Dissertations

OSHA has proposed a new strontium chromate exposure standard that would potentially cause Air Force paint facilities to be in violation of the proposed standard if adopted. This proposed reduction make the continued use of chromate containing primer paints very difficult. There is currently no acceptable replacements for chromate containing primer paints on AF aircraft. This study suggests that paint particles with chromate bound in primer paint may be unavailable for bodily absorption if inhaled and a reduced standard for painting applications may be unnecessary. Primer paint overspray was collected into simulated lung fluid (SLF) and allowed 6 hr, 24 …

Knowledge Base Support For Design And Synthesis Of Multi-Agent Systems, Marc J. Raphael

Theses and Dissertations

AgentTool is an AFIT-produced, AFOSR-sponsored multi-agent system (MAS) development tool intended for production of MASs that meet military requirements. This research focuses on enabling MAS design and synthesis tools like agentTool to store, retrieve, and filter persistent, reusable, and reliable agent domain knowledge. This "enabling" is vital if such tools are expected to produce consistent, maintainable, and verifiable agent applications on short timetables. Enabling requires: 1) modeling the agent knowledge domain, 2) designing and employing a persistent knowledge base, and 3) bridging that domain model to the knowledge base with an extensible domain interchange grammar. The achieved interchange grammar, called …