Digital Commons Network^™

Strategic Airlift En Route Analysis To Support The Global War On Terrorism Using A Value Focused Thinking Approach, Marykathryn W. Tharaldson

Theses and Dissertations

The Global War on Terrorism (GWOT) has yielded new challenges to the United States' strategic airlift infrastructure. The network of en-route airfields that serve as refueling and maintenance stops were designed primarily to service relatively static Cold War requirements. However, the GWOT has resulted in the need for an infrastructure that is responsive to a highly dynamic environment. This research uses a "value focused" methodology to identify en-route airfield locations that simultaneously maximize cargo throughput capability while possessing a high degree of adaptability to volatile cargo delivery requirements.

Detecting Potential Insider Threats Through Email Datamining, James S. Okolica

Theses and Dissertations

No abstract provided.

Development And Testing Of An Inflatable, Rigidizable Space Structure Experiment, Sarah K. Helms

Theses and Dissertations

Many recent space technology concepts require large space structures such as solar arrays and large aperture antennas; however, tight constraints on payload mass and volume often preclude their launch. Employing inflatable, rigidizable structures can reduce mass and volume while providing sufficient packing flexibility and structural stiffness. AFIT has developed RIGEX to flight-test this type of structure. RIGEX will test the deployment and structural characteristics of three thermoplastic composite Sub-Tg tubes. Once launched on the Space Shuttle in 2007, the spaceflight results will be compared to lab data to validate on-orbit reliability and ground test methods. This paper documents three main …

A Systems Engineering Approach To Integrated Structural Health Monitoring For Aging Aircraft, Alan P. Albert, Efstathios Antoniou, Stephen D. Leggiero, Kimberly A. Tooman, Ramon L. Veglio

Theses and Dissertations

The United States Air Force and many of its Coalition partners have extended the original service life of some of their aging aircraft due to fiscal constraints. This life extension often requires increased periodic and in-depth inspections; increasing maintenance costs and resulting in longer periods of aircraft downtime. A structural health monitoring system for aging aircraft could reduce the current inspection burden, and thus decrease costs and system downtime. This presentation describes a baseline systems engineering methodology for system definition of an aging aircraft structural health monitoring system. Analysis was performed to quantify the potential benefit a structural health monitoring …

Development Of Autonomous Unmanned Aerial Vehicle Platform: Modeling, Simulating, And Flight Testing, Nidal M. Jodeh

Theses and Dissertations

The Advanced Navigation Technology (ANT) Center at the Air Force Institute of Technology (AFIT) conducts extensive research in advanced guidance, navigation, and control to exploit the full potential of autonomous Unmanned Aerial Vehicles (UAV). The research in this thesis describes a UAV research platform developed to support the ANT Center's goals. This platform is now the bedrock for UAV simulation and local flight test at AFIT. The research has three major components. The first component is development of a physical, inertial, and aerodynamic model representing an existing aircraft. A systematic analysis of the airframe leads to a complete geometric, inertial, …

Hazardous Materials Transportation: A Meta-Analysis Of State Level Policy And Regulations, David J. Pastika

Theses and Dissertations

Every day, over 800,000 hazmat transactions take place across the United States. This segment of transportation is expected to grow at a modest two percent a year for the foreseeable future but differences of regulations between the state and Federal level have been a growing concern for both the government and members of the hazmat industry. A patchwork of often inconsistent permits, registration requirements, and hazmat organizational structures at the state level often create barriers to the efficient means of commerce for hazmat carriers and shippers. This thesis explores the history of hazardous regulations since de-regulation of the trucking industry …

Structural Health Monitoring Considering Internal Beam Damage, Jessica B. Chronister

Theses and Dissertations

The present study establishes a nondestructive method of damage detection and assessment in cantilever beams. The specimens used are twelve-inch aluminum 2024-T3 beams with machined notches of varying lengths and locations. Laser Doppler vibrometry is used to obtain the frequency response of vibrating beams. Experimental methods are developed to detect the presence, location and extent of damage by direct observation of the eigenvector in the third through eighth modes. Models in MATLAB and ABAQUS are used to predict and validate the observed data. With this experimental method developed, the validity of the method is tested for specimens that have been …

Assessing Resource Value And Relationships Between Objectives In Effects-Based Operations, Robert D. Jones

Theses and Dissertations

The purpose of this research was developing techniques to calculate the value of a resource within the context of campaign objectives, to identify competing objectives, and to identify conflicting objectives to improve a commander’s ability to allocate limited resources. A methodology was developed to express a campaign’s objective hierarchy in terms of a set of desired end states for the campaign’s system of systems. Value theory was used to identify the resource's value in terms of the direct and indirect effects that are produced to achieve the campaign’s objectives. Binding resource constraints within an integer program were used to identify …

Perceived Health Status And Needs Of Elders Of The Spirit Lake Nation, Eileen M. Tabert

Theses and Dissertations

Chronic disease inflicts a huge financial and collective burden on the people of this nation. Disparities in chronic disease and health risk behaviors do exist for Native Americans. The multiple disparities of the Spirit Lake Nation are identified through the use of the survey tool that was developed by the National Resource Center of Native American Aging. The quantitative descriptive study collected self-reported data related to perceived health status, behavioral risk factors, chronic disease, and other demographic information among the Spirit Lake Nation elders.

A health promotion and disease prevention model that influences self care appeared to be the most …

Perceptions Of Parents, Self, And God As Predictive Of Sympton Severity Among Women Beginning Inpatient Treatment For Eating Disorders, Melissa H. Smith

Theses and Dissertations

The present investigation examined whether perceptions of parents, self, and God among women beginning inpatient treatment for eating disorders was predictive of symptom severity. The sample included 464 women (ages 12 to 56 years) beginning inpatient treatment for eating disorders at a private treatment facility, with the majority being Caucasian. Participants completed study measures as part of an initial battery of assessment measures, and included indices of eating disorder symptomology, parental relationships, self-esteem, and religious well-being. Multiple regression analysis showed perceptions of self and parents to be significant predictors, however perceptions of God failed to predict eating disorder symptom severity. …

Vulnerabilities To Depression, Anxiety And Interpersonal Problems: The Role Of Parental Styles, Schemas And Coping Styles, Daniel Kennedy

Theses and Dissertations

Cognitive theory proposes that maladaptive schemas influence the development of anxious and depressive symptoms and early parental experiences have been proposed to influence schema development. In this current study, measures of depressive and anxious pathology, parenting styles, coping styles and interpersonal problems were administered to 224 undergraduate students. The main purpose the study was to test the cognitive model and the hypothesis that early maladaptive schemas (EMS) as defined by Young (1994) mediate the relationship between parenting styles and anxious and depressive pathology. Results indicated that EMSs do play an important mediational role in relationship to both anxious and depressive …

Measurement, Characterization, And Source Apportionment Of The Major Chemical Components Of Fine Particulate Material, Including Semi-Volatile Species, Brett D. Grover

Theses and Dissertations

The promulgation of revised standards for atmospheric fine particles (PM2.5) by the US EPA has sparked renewed interest in the ability to accurately measure and characterize suspended atmospheric particulate matter. Semi-volatile material (SVM), consisting of ammonium nitrate and semi-volatile organic material (SVOM), is not accurately measured by EPA accepted methods such as the Federal reference method (FRM) or Tapered Element Oscillating Microbalance (TEOM). However, SVM is often a major fraction of urban aerosols. Recent advances in atmospheric sampling instrumentation allowed for the semi-continuous characterization of urban PM2.5, including SVM. The Filter Dynamic Measurement System (FDMS) was shown to measure total …

A Qualitative Study Of The Supports Women Find Most Beneficial When Dealing With A Spouse's Sexually Addictive Or Compulsive Behaviors, Jill Christine Manning

Theses and Dissertations

While not included in the diagnostic classifications of sexual disorders in the Diagnostic and Statistical Manual of Mental Disorders (DSM), sexual addictions and compulsivities are increasingly being encountered by mental health professionals, and the field of sexual addictions is gaining wider acceptance (Delmonico & Carnes, 1999; Garos, 1997). Research shows the majority of people struggling with sexual addictions and compulsivities involving the Internet are married, heterosexual males (Cooper, Delmonico, & Burg, 2000), and that women who are married to these men are directly impacted by this problem (Schneider, 2000b). Although there is research on many issues relating to wives of …

Using Augmented Virtuality To Improve Human-Robot Interactions, Curtis W. Nielsen

Theses and Dissertations

Mobile robots can be used in situations and environments that are distant from an operator. In order for an operator to control a robot effectively he or she requires an understanding of the environment and situation around the robot. Since the robot is at a remote distant from the operator and cannot be directly observed, the information necessary for an operator to develop an understanding or awareness of the robot's situation comes from the user interface. The usefulness of the interface depends on the manner in which the information from the remote environment is presented. Conventional interfaces for interacting with …

A Framework For An Implantable Wireless Pressure And Volume Sensor Focusing On The Diagnosis And Treatment Of Shunt Failure In Hydrocephalus Patients, Donald Monte Wichern

Theses and Dissertations

The framework for a permanently implantable wireless compliance sensor was developed and validated using laboratory experiments. The proposed sensor would measure the intracranial pressure and fluid volume in the brain and return this information to a monitoring device. The designed sensor received power remotely from the monitoring device negating the need for an implanted power source. Impedance measurement estimation techniques were suggested, studied and applied to the compliance sensing system. A new impedance measurement technique, accounting for multiple variability in the domain, was developed. An extensive simulation environment was designed and used to develop the laboratory experiments and hardware. The …

Victorians And The Underground, Melissa Mcdaniel

Theses and Dissertations

The Victorian Age created a revolution in technology that defined the age and has fostered its social ideologies. In every civilization, the technologies of the time reflect the social issues of the culture. For instance, the development of the printing press in the fifteenth-century revealed desires for higher literacy rates; the invention of the cotton gin incited the social injustices of American slavery; the progress of the Internet embodies this century's attachment to fast-food, fast-money, and fast-information. Likewise, in the Victorian Age, the invention of underground tunnels exposed some important social issues which developed in the period. Just as the …

Evaluating Support Services For African American Females At A Historically Black College, Sabrina Ferguson Edwards

Theses and Dissertations

This study examined the effectiveness of the Women’s Resources Assistance Program (WRAP), a support service for African American females attending a historically black college or university (HBCU). The study included 230 participants. The purpose of the study was to gauge, through the use of surveys, each participant’s knowledge and level of participation in the WRAP.

The participants were issued questionnaires and interview forms to complete during the study. The questionnaires contained 11 closed-ended questions that were designed to determine the participating students’ attitude towards WRAP as well as their level of participation. Similarly, oral interviews were conducted to ascertain the …

Active Learning: Strategies In Nursing Education, Loretta Vobr

Theses and Dissertations

No abstract provided.

Single Nucleotide Polymorphisms In The Folypoly-Gamma-Glutamate Synthetase Gene, Nadine Thompson

Theses and Dissertations

Folic acid is an essential vitamin utilized in the one-carbon metabolism pathway for the synthesis of purine and thymidine nucleotides, which are necessary for cell growth and proliferation. As a result, the enzymes that participate in the metabolism of folic acid have been good targets for cancer chemotherapy. Folylpoly-γ-glutamate synthetase (FPGS) is an enzyme in the folate metabolism pathway that catalyzes the addition of glutamic acid to the naturally occurring folates, thereby allowing the retention of folate cofactors in cells. Similarly, in the case of cancer chemotherapy, antifolates, such as Lometrexol and Tomudex are retained in cells through the activity …

Characterization Of Perphenazine And Scopolamine Aerosols Generated Using The Capillary Aerosol Generator, Xihao Li

Theses and Dissertations

The characterization of perphenazine and scopolamine aerosols generated using the capillary aerosol generator (CAG) was reported. Variables including steady state power, the formulation vehicle, the drug concentration and the formulation flow rate were studied for their effects on the chemical stability and particle size of these drug aerosols.Stability-indicating HPLC and LC-MS assays were developed and validated for perphenazine and scopolamine, respectively. The chemical stability of each compound was investigated under a variety of stress conditions and the structure of degradation products was proposed.Perphenazine aerosols were generated from propylene glycol (PG) formulations with concentrations of 9, 48 and 90mM at formulation …

Diffuse Brain Injury Triggers Ultra-Rapid Perisomatic Traumatic Axonal Injury, Wallerian Change, And Non-Specific Inflammatory Responses, Brian Joseph Kelley

Theses and Dissertations

A significant component of diffuse brain injury (DBI) is diffuse axonal injury (DAI) which is responsible for the morbidity and mortality associated with this condition. DAI and its experimental counterpart traumatic axonal injury (TAI) result in scattered microscopic pathology characterized by focal impairment of axonal transport leading to progressive swelling and delayed axotomy. DBI-mediated perisomatic axotomy does not result in acute neuronal death suggesting that delayed axotomy was responsible for this unanticipated response. To evaluate this hypothesis, we examined the spatiotemporal progression of DBI-mediated perisomatic TAI. LM / TEM identified impaired axonal transport within 15 - 30 min post-injury. Perisomatic …

A Model For Studying Vasogenic Brain Edema, Anshu Shukla

Theses and Dissertations

Convection-enhanced delivery (CED) is a proven method for targeted drug delivery to the brain that circumvents the blood-brain barrier (BBB). Little study has been conducted in understanding CED in pathological brain states. This is of importance when dealing with chemotherapeutic agent delivery to brain tumors, where vasogenic edema (VE) exists. The current study aims to characterize a model of VE suitable for studying CED.VE was produced in the right hemisphere of the rat brain using multiple infusions of hyperosmotic mannitol (0.25mL/kg/s over 30 seconds) delivered through the right internal carotid artery. Magnetic resonance imaging (MRI) revealed consistent edema formation and …

An Exploration Of How And Why Primary Care Providers Educate Infant Caregivers About Positioning, Amy Greenspon Choffin

Theses and Dissertations

A review of the literature indicates that how infants are positioned is related to the risk of SIDS, the incidence and severity of plagiocephaly, torticollis, and developmental delays. A quantitative approach with survey methodology was used with 66 pediatric primary care providers responding to 26 questions. Overall, PCPs are educating caregivers about sleep positioning with a high frequency. There was a relationship between practice site, and the frequency of sleep positioning education is provided. While the participants provide education about awake positioning, and the use of positioning devices, it was with less frequency than they do about sleep positioning; there …

A Model To Predict 24-Hour Urinary Creatinine Level Using Repeated Measurements, Donna S. Kroos

Theses and Dissertations

Creatinine is a metabolic waste product, removed from the blood by the kidneys, and excreted in the urine. The measurement of creatinine is used in the assessment and monitoring of many medical conditions as well as in the determination or adjustment of absorbed dosage of pesticides. Earlier models to predict 24-hour urinary creatinine used ordinary least squares regression and assumed that the subjects' observations were uncorrelated. However, many of these studies had repeated creatinine measurements for each of their subjects. Repeated measures on the same subject frequently are correlated. Using data from the NIOSH-CDC "Pesticide Dose Monitoring in Turf Applicators" …

Applying Principles Of Information Design To Help Parents Accept Babies With Down Syndrome, Anita Eradla

Theses and Dissertations

My creative project is a system of resource materials designed for parents and expecting parents to promote acceptance of babies with Down syndrome. This project is also a study of information architecture and icon development, and an opportunity to study the universal and emotive qualities of an iconic system.

Determinants Of Dating Violence Among Youth In The U.S., Candace Hamm

Theses and Dissertations

Background: Physical Dating Violence (PDV) victimization is a major public health concern among adolescents in the United States. Research has shown that determinants of PDV victimization are different for male and female adolescents. However, inconsistent findings entail that further research needs to be done using a representative sample of male and female adolescents.Objective: To identify gender-specific determinants of PDV victimization utilizing a nationally representative sample of high school adolescents.Methods: Data from the 2005 National Youth Risk Behavior Survey was used for this analysis. The study population included 6.951 male and 6,807 female students in grades 9 through 12. Bivariate and …

Forecasting Stability Levels For The Countries Of The Former Soviet Union, Margaret Erin Keck

Theses and Dissertations

United States intelligence officers and policymakers need reliable forecasts of country, regional, and global stability or instability. Such forecasts require a methodology for identifying and analyzing factors that contribute to stability. The anticipation of this stability level can facilitate crisis warning and diplomatic strategies for various timelines, including five, ten, and twenty year forecasts. While the problem of forecasting can be tackled in various ways, in the interest of time and space, I will only go into a few of them. The approach I will use is multiple linear regression to generate a short-term forecast for the stability levels of …

State Of Being, Anne Bradshaw

Theses and Dissertations

My work speaks to the processes of adaptation and assimilation, phenomena that explain the way in which we transform life experience and incorporate the effects of such experience into the daily workings of our psyche. To this extent my work is a self-analysis, an autobiographical reckoning, a non-verbal representation of collective experiences rendered in forms upon which images are spontaneously drawn or painted with fiber. The process of making art as a means of accessing creative instincts is a manifestation of the way in which I experience life. Adapting and assimilating to our human condition is an art, a form …

Characterization Of Vancomycin Resistance In Staphylococcus Aureus, Paige Mccarthy Fox

Theses and Dissertations

In the past decade, Staphylococcus aureus has developed two distinct vancomycin resistance mechanisms. First, the bacterium is capable of generating a thickened, poorly crosslinked cell wall that creates false targets. These targets cause vancomycin to bind at the periphery of the thickened peptidoglycan, allowing normal cell wall formation to continue at the cell membrane. Second, S. aureus has acquired genes from Enterococcus that encode an alternative stem peptide. The genes, known as van genes, alter the target of vancomycin, rendering vancomycin treatment ineffectual.In this work, we attempted to further characterize both mechanisms of vancomycin resistance. First, a potential link between …

Immunological And Molecular Analyses Of The Borrelia Burgdorferi Ospf Protein Family F, Emily Tran

Theses and Dissertations

In North America, Borrelia burgdorferi is the primary causative agent of Lymedisease which is a growing health concern. The ability of B. burgdorferi to maintain chronic infection indicates that they are capable of immune evasion. A distinguishing characteristic of B. burgdorferi is the large number of sequences encoding predicted or known lipoproteins, including outer surface protein F (OspF). This study analyzes the specificity of the humoral immune response to B. burgdorferi B3 IMI OspF proteins during murine and human infection. Immunoblot analyses revealed a temporal expression of OspF proteins during infection and mapped the immunodominant epitopes which lie within the …