Digital Commons Network^™

Clustering Methods For Delineating Regions Of Spatial Stationarity, Jared M. Collings

Theses and Dissertations

This paper seeks to further investigate data extracted by the use of Functional Magnetic Resonance Imaging (FMRI) as it is applied to brain tissue and how it measures blood flow to certain areas of the brain following the application of a stimulus. As a precursor to detailed spatial analysis of this kind of data, this paper develops methods of grouping data based on the necessary conditions for spatial statistical analysis. The purpose of this paper is to examine and develop methods that can be used to delineate regions of stationarity. One of the major assumptions used in spatial estimation is …

A Virginia Woolf Of One's Own: Consequences Of Adaptation In Michael Cunningham's The Hours, Brooke Leora Grant

Theses and Dissertations

With a rising interest in visual media in academia, studies have overlapped at literary and film scholars' interest in adaptation. This interest has mainly focused on the examination of issues regarding adaptation of novel to novel or novel to film. Here I discuss both: Michael Cunningham's novel The Hours, which is an adaptation of Virginia Woolf's Mrs. Dalloway, and the 2002 film adaptation of Cunningham's novel. However, my thesis also investigates a different kind of adaptation: the adaptation of a literary and historical figure. By including in The Hours a fictionalization of Virginia Woolf, Cunningham entrenches his adaptation with Virginia …

The Church Of Jesus Christ Of Latter-Day Saints In National Periodicals: 1991-2000, Casey William Olson

Theses and Dissertations

From 1991 through 2000, The Church of Jesus Christ of Latter-day Saints experienced a greater volume of national periodical attention than ever before in its history. This thesis surveys what was written about the Church in national magazines during that time and provides analysis of the effect of those writings on the Church's public image. National periodicals may serve as an important gauge of the Church's public image because they address topics of national interest and also help to formulate public opinion on those topics. This study thus provides a basis for determining how the Church fared in terms of …

Microchip Liquid Chromatography And Capillary Electrophoresis Separations In Multilayer Microdevices, Hernan Vicente Fuentes

Theses and Dissertations

In this dissertation, several microfabricated devices are introduced to develop new applications in the area of chemical analysis. Electrochemical micropumps, chip-based liquid chromatography systems and multilayer capillary electrophoresis microdevices with crossover channels were fabricated using various substrates such as poly(dimethylsiloxane) (PDMS), glass, and poly(methyl methacrylate) (PMMA). I have demonstrated pressure-driven pumping of liquids in microfabricated channels using electrochemical actuation. PDMS-based micropumps were integrated easily with channel-containing PMMA substrates. Flow rates on the order of ~10 µL/min were achieved using low voltages (10 V). The potential of electrolysis-based pumping in microchannels was further evaluated for pressure driven microchip liquid chromatography (LC). …

An Evaluation Of A Low-Cost Uav Approach To Noxious Weed Mapping, Brandon Tyler Jones

Theses and Dissertations

Mapping their location and extent is a critical step in noxious weed management. One of the most common methods of mapping noxious weeds is to walk the perimeter of each patch with a handheld GPS receiver. This is the method used at Camp Williams, a National Guard Bureau training facility in Utah where this study was conducted. It was proposed that a low-cost Unmanned Aerial Vehicle (UAV) that made use of a hobbyist remote control airplane equipped with a Global Positioning System (GPS) receiver and digital camera could be used along with automated post-processing techniques to reduce the cost of …

Pornography Viewing As Attachment Trauma In Pair-Bond Relationships-A Theoretical Model Of Mechanisms., Spencer T. Zitzman

Theses and Dissertations

Online sexual activities, including pornography use, have drastically increased in recent years. Many studies have examined the impact that pornography use can have on marriages and families. One of the key findings has been that pornography use can negatively impact trust in relationships. This study focused on understanding the mechanisms involved when a husband's pornography use negatively impacts his marital relationship and his wife's emotional well-being. Through qualitative analysis of interviews of 14 wives who received therapy because of their husband's pornography use, the analytic team found (1) a breakdown of expectations and assumptions central to the marriage, (2) a …

Effects Of Delayed Auditory Feedback On The Bereitschaftspotential, Jennifer L. Johnson

Theses and Dissertations

This study examined the brain electrical activity of normal speakers in a non-delayed auditory feedback (DAF) condition and when experiencing DAF to determine the effect DAF would have on the Bereitschaftspotential (BP). The BP reflects the preparatory state of a person prior to motor execution of an act and can be observed 1500 to 500 ms prior to voluntary movement. The participants in the study included 10 adults with normal speech. Each read a series of 30 sentences, both without DAF and with DAF, while the BP was measured. Results indicate that the BP is present across the scalp in …

Microfluidic Electro-Osmotic Flow Pumps, John Mason Edwards

Theses and Dissertations

The need for miniaturized, portable devices to separate and detect unknown compounds has greatly multiplied, leading to an increased interest in microfluidics. Total integration of the detector and pump are necessary to decrease the overall size of the microfluidic device. Using previously developed thin film technologies, an electroosmotic flow (EOF) pump was incorporated in a microfluidic liquid chromatography device. An EOF pump was chosen because of its simple design and small size. EOF pumps fabricated on silicon and glass substrates were evaluated. The experimental flow rates were 0.19-2.30 microliters/minute for 40-400 V. The theoretical pump efficiency was calculated along with …

Supporting Flight Control For Uav-Assisted Wilderness Search And Rescue Through Human Centered Interface Design, Joseph L. Cooper

Theses and Dissertations

Inexpensive, rapidly deployable, camera-equipped Unmanned Aerial Vehicle (UAV) systems can potentially assist with a huge number of tasks. However, in many cases such as wilderness search and rescue (WiSAR), the potential users of the system may not be trained as pilots. Simple interface concepts can be used to build an interaction layer that allows an individual with minimal operator training to use the system to facilitate a search or inspection task. We describe an analysis of WiSAR as currently accomplished and show how a UAV system might fit into the existing structure. We then discuss preliminary system design efforts for …

Split-Half Reliability Of Mlu And Mlu2 In Two Methods Of Utterance Segmentation, Alyse Diana Kemeny

Theses and Dissertations

Concerns regarding Mean Length of Utterance (MLU) has led to adaptations of this method of analysis. A recent study by Johnston (2001) introduced an alternative to MLU called MLU2. The current study investigates the split-half reliability of MLU and MLU2 as well as another alternative, Median Length of Utterance (Med-LU). Split-half reliability was found for these methods when segmented into Phonological and Communication Units. Split-half reliability of MLU2 was generally higher than that of MLU, and both were higher than Med-LU. The study suggests that MLU2 may also be a valuable tool for clinicians in analyzing child language.

Psychometrically Equivalent Cantonese Bisyllabic Word Recognition Materials Spoken By Male And Female Talkers, Brooke Kristin Conklin

Theses and Dissertations

The purpose of this study was to create psychometrically equivalent word lists in the language of Cantonese for word recognition testing. Frequently used bisyllabic Cantonese words were recorded by a native female and male talker. The word lists were evaluated by administering the word recognition lists to 20 native speakers of Cantonese with normal hearing. Each list was presented at 10 different intensity levels ranging from -5 to 40 dB HL in 5 dB increments. Logistic regression was used to determine the words with the steepest logistic regression slopes. The 200 words with the steepest slopes were then formulated into …

Dreamwork With Children: Perceptions And Practice Of School-Based Mental Health Professionals, Rosalia Rodriguez Huermann

Theses and Dissertations

Forty nine public school mental health practitioners (i.e., school counselors, school psychologists, and school social workers) completed a survey about working with dreams when counseling students. Most practitioners in this sample reported having at least one student bring up dreams during counseling and spent some time in counseling working with students' dreams. Practitioners addressed dreams more frequently in situations where the student was having troubling dreams or nightmares, and/or was dealing with death and grief. They also acknowledged working with dreams with students who were diagnosed with Post Traumatic Stress Disorder, were emotionally disturbed, suffered from recurrent dreams, were depressed, …

Exercise Induced Hypervolemia: Role Of Exercise Mode, William Bradley Nelson

Theses and Dissertations

The supine posture has been shown to limit exercise-induced plasma volume expansion. Differences in hydrostatic pressure gradients between the standing and seated position indicate that treadmill exercise might promote a greater plasma volume expansion than cycle ergometer exercise. To test this hypothesis ten subjects performed intermittent high intensity exercise (4 min at 85% VO2max, 5 min at 40% VO2max repeated 8 times) on separate days on the treadmill and cycle ergometer. Changes in plasma volume expansion were calculated from changes in hematocrit and hemoglobin. Stroke volume (SV), trans-thoracic impedance (Z0), HR, and arterial blood pressure (non-invasive arm cuff, SBP & …

Gender Differences And Similarities In The Work-Family Interface: The Importance Of Considering Family Life Stages, Giuseppe Martinengo

Theses and Dissertations

This study focuses on the importance of considering the interaction between gender and family life stages to properly understand gender similarities and differences in the work and family interface. Data for this study come from the IBM 2004 Global Work and Life Issues Survey representing 79 countries (N=41,813). This study is a first step toward a better understanding of similarities and differences among male and female workers across the life course and it shows that work, family and life outcomes are similar across groups, independent of life stages or gender. Six family life stage groups were created: no children and …

Accounting For Additional Heterogeneity: A Theoretic Extension Of An Extant Economic Model, Bradley John Barney

Theses and Dissertations

The assumption in economics of a representative agent is often made. However, it is a very rigid assumption. Hall and Jones (2004b) presented an economic model that essentially provided for a representative agent for each age group in determining the group's health level function. Our work seeks to extend their theoretical version of the model by allowing for two representative agents for each age—one for each of “Healthy” and “Sick” risk-factor groups—to allow for additional heterogeneity in the populace. The approach to include even more risk-factor groups is also briefly discussed. While our “extended” theoretical model is not applied directly …

Applying Bayesian Ordinal Regression To Icap Maladaptive Behavior Subscales, Edward P. Johnson

Theses and Dissertations

This paper develops a Bayesian ordinal regression model for the maladaptive subscales of the Inventory for Client and Agency Planning (ICAP). Because the maladaptive behavior section of the ICAP contains ordinal data, current analysis strategies combine all the subscales into three indices, making the data more interval in nature. Regular MANOVA tools are subsequently used to create a regression model for these indices. This paper uses ordinal regression to analyze each original scale separately. The sample consists of applicants for aid from Utah's Division of Services for Persons with Disabilities. Each applicant fills out the Scales of Independent Behavior"”Revised (SIB-R) …

A Revision Of The Marital Status Inventory: Reliability And Validity With Marital And Remarital Couples, Rachel V. Jamieson

Theses and Dissertations

Predicting divorce potential has been of interest to researchers and clinicians. The Marital Status Inventory (Weiss & Ceretto, 1980) was developed to provide information about clients' perceived divorce potential. The MSI has been widely used but there have been complaints about the negatively worded items from clients, therapists, and researchers. Therefore, this study compared a revised form of the MSI (MSI-R has no negatively worded items) with the original format. There were three purposes of the study. The first was to assess the reliability and validity of the MSI-R. The second purpose was to see if the MSI-R continued to …

Inter- And Intra-Subject Variability: A Palatometric Study, Marybeth Corey Sanders

Theses and Dissertations

Electropalatometry (EPM) has proven to be a useful clinical and research tool for measuring tongue-to-palate contact. The goal of this study was to determine whether the development of a database of standardized palatometric articulation files is feasible by examining the variability which exists within and between speakers. Twenty standard American English dialect speakers were fitted with palatometer pseudopalates. Test stimuli were VCV nonsense words using a schwa in the initial position, the 15 palatal consonants, and three corner vowels, /a/, /i/, /u/. From these palatometric recordings a variability index was created to examine intra- and interspeaker variability. Different aspects of …

The Effectiveness Of Prophylactic Eye Drops On The Reversal Of Uv-Light Induced Cataracts, Contessa Bly Bowman

Theses and Dissertations

Cataracts are a cloudiness of the lens within the eye which obstructs vision. They are found in many species including rats, dogs, and humans. Vision is hindered where this "cloudiness", made of water build up and broken crystalline, proteins take form. Oculvet is an eye medication, used by veterinarians, containing carnosine as its active ingredient. Topical application of carnosine is reported to be an effective treatment for the prevention and removal of pre-existing cataracts. For this experiment, Sprague- Dawley rats were anesthetized and exposed to ultraviolet radiation, UVB and UVC. They were divided into four groups (n = 32), three …

Are Community Values Toward Education Reflective Of A District's Reputation For Quality Education: A Case Study Approach, Sheldon Marc Deveaux

Theses and Dissertations

An increasing number of parents across the nation are seeking alternatives to educate their children. School progress is being documented because of the implementation of the No Child Left Behind Act of 2001. Because America's education system is enthralled with academic reforms, research about this thesis topic is significant and timely.

This case study approach addresses the question whether public school districts successfully meet the education standards of parents in the community? Also, the author compares and contrasts the benefits between private and home schooling. Finally, the author addresses specific educational issues that motivate parents to remove their children from …

A 17-Year Longitudinal Study Of Spiritual Development And Psychological Correlates In A Sample Of College Students, Jeremy Daniel Bartz

Theses and Dissertations

In 1984, 1987 and 2001 data were collected on a religiously devout group of college students in an effort to better understand the process of religious development and the relationship between religiosity and mental health. This study analyzes that data by examining the stability of two different religious development styles that were identified in 1984, the stability of religious motivations over the course of adulthood, and the relationship between devoutness and psychopathology. This study found that (a) the religious developmental styles did not remain consistent from 1984 to 2001, (b) the participants' religious motivations remained stable over the course of …

A Study Of The Attitudes Of Selected African American Students Toward Leadership & Black Greek Letter Organizations, Elora L. Crump

Theses and Dissertations

The participants in this study consisted of 76 African-American students at Rowan University in the spring 2005 semester. The purpose of the study was to replicate the research of Kimbrough (1995) exploring the attitudes of two groups of selected African American students regarding the impact of Black Greek organizations on the development of personal leadership. Subjects completed a survey indicating their level of leadership skills and activities, attitudes of Black Greek organizations and their leadership, along with demographic information. Members of Black Greek organizations (BGOs) and-non-members were compared to determine if there were attitudinal differences. The information collected from the …

Disclosure Of Abuse As A Moderating Variable For Internalized Shame In Adult Survivors Of Childhood Sexual Abuse, Ami Mariko Hood Frost

Theses and Dissertations

Although previous research has established a correlation between childhood sexual abuse and internalized shame in adult survivors, very little research has been done to examine how disclosure affects that correlation. An adult female sample of survivors of childhood sexual abuse (N=467) were surveyed to determine a possible moderating effect of disclosure on internalized shame. It was predicted that 1) severity of abuse would be a significant predictor of internalized shame; 2) disclosure would be a significant predictor of internalized shame; and 3) disclosure would moderate the relationship between severity of abuse and internalized shame. Through structural equation modeling using AMOS, …

Finite Element Analysis Of Lamb Waves Acting Within A Thin Aluminum Plate, Sejin Han

Theses and Dissertations

Structural health monitoring (SHM) is an emerging technology that can be used to identify, locate and quantify structural damages before failure. Among SHM techniques, Lamb waves have become widely used since they can cover large areas from one single location. Due to the development of various structural simulation programs, there is increasing interest in whether SHM data obtained from the simulation can be verified by experimentation. The objective of this thesis is to determine Lamb wave responses using SHM models in ABAQUS CAE(a Finite Element Analysis(FEA) program). These results are then compared to experimental results and theoretical predictions under isothermal …

Collaborative, Trust-Based Security Mechanisms For A National Utility Intranet, Gregory M. Coates

Theses and Dissertations

This thesis investigates security mechanisms for utility control and protection networks using IP-based protocol interaction. It proposes flexible, cost-effective solutions in strategic locations to protect transitioning legacy and full IP-standards architectures. It also demonstrates how operational signatures can be defined to enact organizationally-unique standard operating procedures for zero failure in environments with varying levels of uncertainty and trust. The research evaluates layering encryption, authentication, traffic filtering, content checks, and event correlation mechanisms over time-critical primary and backup control/protection signaling to prevent disruption by internal and external malicious activity or errors. Finally, it shows how a regional/national implementation can protect private …

Validation Of The Afit Small Scale Combustion Facility And Oh Laser-Induced Fluorescence Of An Atmospheric Laminar Premiext Ed Flame, Stephen J. Koether

Theses and Dissertations

Construction in the AFIT combustion facility is complete and the objective of this report is to explain the steps taken to make the laboratory operational. The infinite radius Ultra-Compact Combustor (UCC) sectional model has been delivered and is fully installed with all fuel, air and instrument lines. Every major system in the lab has been tested and is functioning properly. Laboratory operating procedure has been established to ensure both safety and continuity in experimental results. Finally, the lab has been certified through official safety channels and combustion experiments are underway. The unique capability of the AFIT combustion laboratory is the …

Dating Potential As A Factor Influencing The Tolerance Of Sexual Harassment, Kara Fetter

Theses and Dissertations

Seventy-nine undergraduate females participated in a laboratory analogue developed to investigate a variable labeled as "Dating Potential," defined as the combination of a man's physical attractiveness and status. Researchers attempted to determine if dating potential could influence a young woman's tolerance of peer sexual harassment. Using an instant-message type interaction, participants were exposed via computer to one of four conditions consisting of a picture and profile of a potential male dating candidate. While a man's status did not influence the participant's tolerance, results indicate that women exposed to an attractive male were more likely to tolerate sexually harassing responses.

Plasma Volume And Albumin Mrna Expression In Exercise Trained Rats, Nathan Alex Bexfield

Theses and Dissertations

Introduction- Exercise-induced plasma volume (PV) expansion is typically associated with an increase in plasma albumin content. Increased hepatic albumin synthesis, a transcriptionally regulated process, is thought to contribute to the increase in albumin content. Objective- We tested the hypothesis that exercise training induces an increase in albumin gene expression in relationship to the increase in PV. Methods and Results- 40 adult male Sprague-Dawley rats weighing between 245-350 grams were randomly assigned to one of four groups: cage control (CC); sham exercise 10 min/day at 48% VO2max (NE); continuous exercise training, 60 min /day at 72% VO2max (LI); and high intensity, …

Testing The Assumption Of Sample Invariance Of Item Difficulty Parameters In The Rasch Rating Scale Model, Joseph A. Curtin

Theses and Dissertations

Rasch is a mathematical model that allows researchers to compare data that measure a unidimensional trait or ability (Bond & Fox, 2007). When data fit the Rasch model, it is mathematically proven that the item difficulty estimates are independent of the sample of respondents. The purpose of this study was to test the robustness of the Rasch model with regards to its ability to maintain invariant item difficulty estimates when real (data that does not perfectly fit the Rasch model), polytomous scored data is used. The data used in this study comes from a university alumni questionnaire that was collected …

Cognitive Styles In Student Use, Perception, And Satisfaction With Online Learning, Glenn E. Cockerline

Theses and Dissertations

The current trend toward online learning significantly changes the paradigm for teaching and learning. While instructors structure and sequence how they teach in a traditional face-to-face classroom, the very nature of online learning shifts the locus of control from the instructor to the learner, as the student picks and chooses how and when they access the course, what aspects they dwell on, and for how long. As a result, a need exists to investigate how different students respond to the online interface. This study conducted at a small Canadian mid-western university was designed to investigate whether a relationship existed between …