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An Investigation Of The Impact Of Family Dynamics On Obesity Among African American Adolescent Girls, Tina Mcdyess

Dissertations

Children who are overweight and obese are more likely to maintain their weight status into adulthood (Fletcher, Cooper, Helms, Northington, & Winters, 2009; World Health Organization [WHO], 2015). The prevalence of obesity has shown a more consistent increase among African Americans aged 2-19 (Flegal, Carroll, Kit, & Ogden, 2012; Ogden, Carroll, Kit, & Flegal, 2012; Ogden, Carroll, Kit & Flegal, 2014) with an even greater disparity among African American girls (Ogden & Carroll, 2010). Family dynamics is one of the many factors of the environment that has been linked to obesity among children and adolescents. The purpose of this study …

Characterization Of Swine Production Using Measurements Collected Via Indoor Positioning System, Shaun Perisho

Dissertations

Legislative and market initiatives are requiring that gestating sows move from individual housing to group settings. Little information is known about coping styles of individual sows in these more socially complex environments and thus the impact of different behavioral strategies on sow reproductive success and efficiency was investigated. The movements of 70 sows during periods of reintroduction into large pen gestational housing following insemination was measured with a commercially available system that tracked animal location and accelerations. Principle component analysis (PCA) was used to establish composite variables characterizing each animal’s behavioral response to social reintroduction and revealed the presence of …

A Mechanistic Understanding Of Self-Propagating Amyloid-Β Oligomer Conformations In Alzheimer Disease, Dexter Nathanael Dean

Dissertations

Alzheimer disease (AD) is a fatal neurodegenerative disorder characterized by the widespread deposition of proteinaceous plaques abundant in amyloid-β (Aβ) aggregates. Although the plaques mainly contain high molecular weight, insoluble Aβ fibrils, the low molecular weight soluble aggregates called oligomers have been shown as the primary toxic species responsible for synaptic dysfunction and neuronal loss in AD. The process of aggregation is nucleation-dependent, but also highly stochastic and inhomogeneous resulting in biophysically diverse assemblies. Recent advances in the field indicate a potential correlation between the phenotypic diversity observed in AD subtypes and aggregate polymorphism. Therefore, understanding the molecular mechanisms which …

Antimicrobial Materials Via Thiol-Ene Chemistry, Dahlia Amato

Dissertations

With the increasing prevalence of antimicrobial resistance, the escalation of opportunistic/pathogenic infections is a looming global crisis. To avoid the pitfalls of conventional antibiotics, this dissertation focuses on developing macromolecular solutions to develop novel antimicrobial materials based on essential oils (thymol, carvacrol, and aldehydes). It is well established that essential oil derivatives exhibit high potency towards a wide range of pathogenic microbes. The rapid photopolymerization kinetics, limited by-products, and homogeneous network formation afforded by thiol-ene photopolymerization are utilized to either encapsulate essential oil derivatives or convert them into monomers which can subsequently be incorporated into new antimicrobial materials with new …

Determinants Of The Generalized Trust Radius In Scripted Fragile Sub-Saharan African States, Anthony Caito

Dissertations

Trust between strangers does not come easily in collectivist societies governed by coercive institutions and subject to unstable market forces. More than one-third of all states are fragile, yet the trust literature has shown little interest in explaining the variability of generalized trust among them; instead fixating on social capital, the consequence of the expansion of generalized trust, putting the cart before the horse and leaving unexamined many of its causes. The enhanced accuracy of the reconfigured World Values Survey trust question has generated new research opportunities to address this concern. This dissertation advances the trust literature through identifying, measuring, …

On The Small Count Inflated Poisson Distribution, Michael Floren

Dissertations

Inflated count distributions are used in situations where counts of an underlying distribution of a population are larger than expected by traditional count distributions. One of the most commonly used inflated count distributions is the zero-inflated Poisson distribution. This work demonstrates the construction of a small count inflated Poisson distribution, of which the zero-inflated Poisson distribution is a special case. Model construction and parameter estimation are shown. Simulations analyzing asymptotic properties, group prediction, and count prediction are presented. Conclusions and recommendations for future research are discussed.

Teachers’ Executive Functioning Abilities And Levels Of Occupational Stress, Niraj Mukesh Patrawala

Dissertations

The current study examined the relationship between levels of occupational stress and executive functioning abilities among 62 teachers working in K-12 public schools. The impact of moderator variables such as years of service and educational setting on the relationship between teacher stress and executive functioning were also explored. Participants’ levels of stress were measured via self-report using the Teacher Stress Inventory (TSI) and executive functioning abilities were assessed using the Dimensional Change Card Sorting Task (DCCS) and the Flanker Test of Attention (Flanker) subtests of the National Institutes of Health Toolbox. Multiple Linear Regression (MLR) was used to analyze the …

The Impact Of Debriefing For Meaningful Learning On Knowledge Development, Knowledge Retention, And Knowledge Application Among Baccalaureate Nursing Students, Ann Louise Loomis

Dissertations

Debriefing offers an opportunity to ensure that students can master critical components of nursing that they might not otherwise learn and to remove epistemological roadblocks to knowledge acquisition. Within this study, Debriefing for Meaningful Learning (DML), a theoretically-derived, evidence based and structured debriefing method, was used to explore student’s knowledge acquisition, knowledge retention, and application of knowledge from one patient situation to a different, yet parallel, situation. This quasi-experimental pretest, posttest study explored the impact of the type of debriefing method on the development of knowledge, knowledge retention, and knowledge application. Eighty-two prelicensure baccalaureate nursing students, enrolled in an adult …

How Current Rural Superintendents Believe Aspiring Superintendents Can Best Prepare For The Position, Jeremy Alan Burmeister

Dissertations

The demands and challenges placed upon individuals starting a new career as a school superintendent can be daunting. As the chief education officer (CEO) of the school district, the superintendent faces a tremendous number of dynamic issues and complex problems ( Cambron-McCabe, Cunningham, Harvey, & Koff, 2005; Kowalski, McCord, Peterson, Young, & Ellerson, 2011). At a time of increasing complexity with the role of the superintendency, approximately 49% of the individuals in the position that participated in an AASA survey in 2010 stated they planned to retire by 2015 and an additional 33% responded in an AASA survey taken in …

Identification Of Young Children With Visual Impairments Including Unique Characteristics And Factors Related To Responsive Services, Deette L. Snyder

Dissertations

In order to truly meet the unique learning needs of young children with blindness and visual impairment (BVI), it is critical to accurately define the population to create and implement quality and responsive support services. The current analysis utilized existing data gathered from the Babies Count database to examine the defining characteristics of a sample of 588 young children, aged birth to three, with BVI and then used these characteristics to predict the influence of potential barriers to early referral. This study also examined the multiple variables through descriptive statistics and then utilized a multiple regression procedure to determine which …

Undergraduates’ Collective Argumentation Regarding Integration Of Complex Functions Within Three Worlds Of Mathematics, Brent Allen Hancock

Dissertations

Although undergraduate complex variables courses often do not emphasize formal proofs, many widely-used integration theorems contain nuanced hypotheses. Accordingly, students invoking such theorems must verify and attend to these hypotheses via a blend of symbolic, embodied, and formal reasoning. Using Tall’s three worlds of mathematics as a theoretical lens, this research explores undergraduate student pairs’ collective argumentation about integration of complex functions, with emphasis placed on students’ attention to the hypotheses of integration theorems. Data consisted of videotaped, semistructured interviews with two pairs of undergraduates, during which they collectively reasoned about thirteen integration tasks. Videotaped classroom observations were also conducted …

Saudi Arabian Students' Perceptions Of Teacher Care In The United States, Abdullah Saeed Alasmari

Dissertations

Care is an essential need for human beings, especially students who spend extensive time at school. The goal of this study is to qualitatively explore Saudi university students’ perceptions of teacher care in the US. Fourteen male and female Saudi students at a large Midwestern US university were interviewed. This study offers a literature review about Saudi students’ cultural backgrounds, which make studying their educational experiences more understandable. Several themes emerged from the research data including cultural differences, learning a new language, help and support, making connections, and caring teachers as role models. Recommendations for US American teachers, Saudi Ministry …

Exporting America: The U.S. Information Centers And German Reconstruction, James Podesva

Dissertations

This dissertation examines the establishment of United States Information Centers in West Germany immediately after the Second World War, and their role in securing the support of West German elites for American occupation policies, particularly democratic self-government. Located at the intersection of culture, economics, and American politics, the America Houses (Amerikahäuser) educated curious Germans about the United States, presenting a carefully curated vision of American life that minimized conflict and highlighted the material and cultural prosperity enjoyed by the mythical “average American.” The Americans contended that with the adoption of democracy and a reformed market economy, affluence was something West …

Constituted And Constituing Symbols Of The Kamëntšá Culture: Essays On Native Philosophy Of Culture, Juan Alejandro Chindoy

Dissertations

Drawing from child personal memories, stories, and participation in different ceremonies in Sibundoy (Colombia), as well as from scholarly papers and books on the Kamëntšá culture, a native culture settled in the southwest of Colombia, I discuss the constituted and constituting meanings of a native culture. The main argument is that storytelling, dancing, and yajé ceremonies are Kamëntšá’s symbolic ways of approaching the quest for meaning. At once constituting and constituted symbols of it, Kamëntšá symbols define its culture and sustain it alive. I use the idea of constituting symbols to underlie the experiences of creativity and adjustment of Kamëntšá …

Political Accountability And Determinants Of Governance Under Principal-Agent Theory, Matthew Bluem

Dissertations

This study examines the theory that quality of governance is largely dependent upon political accountability, and that the effect of political accountability on governance varies based on three main determinants: level of democracy, level of information available to the public, and diversification of the economy (Adserà et al. 2003). With quality of governance, represented by the World Bank’s World Governance Indicators (WGI), as the dependent variable, this study considers how these three independent variables, and several control variables, affect governance quality. Incorporating data from 2010 – 2015 for 143 countries in both cross-sectional OLS and fixed effects panel regression analysis, …

The Influence Of Conservation Tillage And Conventional Tillage On Soil Bacterial Diversity In Southern Illinois, Nasser Syed

Dissertations

Agriculture in the Midwest United States (Illinois, Indiana, Iowa, Michigan, Minnesota, Ohio, and Wisconsin) is a critically important component of the United States economy and also for world exports of food grain. This is well reflected in the 2012 Census of Agriculture which showed that these states had a market value of crop and livestock products sold in excess of $80,000,000,000 (USDA, 2012). Within the U.S. the three Midwest states, Illinois, Iowa, and Minnesota are ranked 2nd, 3rd, and 4th for the economic value of crops sold. This economic value of agriculture in the Midwest encompasses not only corn, soybeans, …

A Quantitative Inquiry Into The Relationship Between Learning Styles, Psychological Types And Standardized Achievement Examination Performance Of Nurse Aide Students., Sameer Ahmed

Dissertations

The purpose of this research study was to explore the relationship between learning styles, psychological types and multiple-choice standardized achievement examination performance of nurse aide students with typology being the gross indicator using a non-experimental, comparative and descriptive approach. The study sample included nurse aide students (N = 326) seeking nurse aide certification selected through a stratified random sampling technique. The participation rate for completed MBTI® inventory was 58.42% (N = 326). The learning styles and psychological types were measured against the Myers-Briggs Type Indicator® Form M in North American English. The multiple-choice standardized achievement examination performance of nurse aide …

An Examination Of California Home-Based Early Childhood Educators’ Self-Determination To Attain A Higher Education Degree, Shirley Collins

Dissertations

Purpose: The purpose of this mixed-methods study was to examine, identify, and describe the perceived impact of the self-determination attributes of autonomy, competence, and relatedness on the persistence and retention of California licensed home-based early childhood educators who attended higher education degree programs.

Methodology: This study utilized a concurrent triangulation mixed-methods approach to gain an understanding of the impact of self-determination on California licensed home-based early childhood educators’ persistence and retention in college. Three hundred members of the San Diego County Family Child Care Association and/or the California Family Child Care Network were invited to participate in this …

Conversational Leadership: A Phenomenological Study Of Exemplary High School Principals And The Behaviors They Practice In Leading Their Organizations, Robert Harris

Dissertations

Purpose: The purpose of this phenomenological research study was to describe behaviors exemplary high school principals practiced to lead their organization through conversation using Groysberg and Slind’s (2012c) four elements of conversational leadership: intimacy, interactivity, inclusion, and intentionality.

Methodology: This qualitative phenomenological study described the lived experiences of exemplary high school principals. A sample of 10 participants was selected from the target population that was narrowed to high school principals in Los Angeles County. Semi-structured interviews were conducted in accordance to a protocol developed by a team of 12 peer researchers with the guidance of faculty. In addition, data from …

Mindfulness As A Vigilance Intervention: Examining Its Impact On Stress And Mental Demand, Kelli Huber

Dissertations

Occupations involving vigilance performance (i.e., sustained attention in monitoring for rare environmental threats) are known to experience vigilance decrement, a decline in performance over time. These occupations are known to be cognitively and emotionally challenging, giving rise to harmful effects for employees in them and presenting safety implications for the welfare of others. The current study investigated mindfulness as a potentially viable intervention to alleviate outcomes of vigilance demands: stress and mental demand. A mindfulness induction was compared to an unfocused control condition in which both were administered during a break from a vigilance task, specifically, a baggage screening task. …

Cultural Identity Silencing Of Native American Identity In Education: A Descriptive Phenomenological Investigation, Katheryne Leigh

Dissertations

Native American Nations have been subjected to colonialism for centuries the impact of which led to further traumatic events and disparities. Although recent scholarship has investigated possible relationships between traumas experienced in education and issues such as depression, substance use, poor academic achievement, and suicide, there remained a need for qualitative studies exploring the phenomenon from the voice of the experiencer. The purpose of this study was to investigate the phenomenon of cultural identity silencing of Native American identity in education. Eight young adult self-identified Native American/Alaskan college students between the ages of 18-25 who experienced cultural identity silencing in …

The Ecology And Feeding Behavior Of Mosquitoes In The Galapagos Islands, Samoa S. Asigau

Dissertations

Mosquitoes remain important vectors in transmitting wildlife diseases. This dissertation aims to understand the role that mosquitoes play in transmitting wildlife diseases such as avian malaria, a protozoan parasite belonging to the genus Plasmodium. Using data from wild-caught mosquitoes captured in multiple years and across multiple islands on the Galapagos Archipelago, we describe distributional patterns of mosquitoes, their range limits and assess whether there exists a disease-free refuge as occurs in Hawaii. We show that altitudinal ranges for disease transmission of avian malaria may not be bounded by a stable disease-free refuge, since mosquitoes are found at all elevations, …

Exploring The Relationship Between Family Social Capital And Utilization Of Well Child Preventative Health Care Services, Kristi K. Westphaln

Dissertations

Background: Passage of the Affordable Health Care Act of 2010 increased insurance coverage for children, however possession of health care insurance doesn’t always equate to effective use of health care services. Misuse and underutilization of health care homes is associated with higher costs, fragmentation of health care, and poor health outcomes across the lifespan. Along with reliance upon the health care system, child health and well-being are dependent upon social factors such as interactions with caregivers and communities. Family social capital (FSC) addresses the interrelated nature of child health and family interaction while also promoting family cohesion as currency …

The Predictors Of Juvenile Recidivism: Testimonies Of Adult Students 18 Years And Older Exiting From Alternative Education, La Toshia Palmer

Dissertations

Purpose: The purpose of this descriptive, qualitative study was to identify and describe the importance of the predictors of juvenile recidivism and the effectiveness of efforts to prevent/avoid juvenile recidivism as perceived by previously detained, arrested, convicted, and/or incarcerated adult students 18 years of age and older exiting from alternative education in Northern California. A second purpose was to explore the types of support provided by alternative schools and the perceived importance of the support to avoid recidivism according to adult students 18 years of age and older exiting from alternative education.

Methodology: This qualitative, descriptive research design identified …

A Correlation Study Of Perceived Servant Leadership Practices And Job Satisfaction Among Teachers In A Military Foreign Language Center, Saliha Murtic

Dissertations

Purpose: This correlation study determined the relationship between the level of servant-leadership practices of department chairs perceived by their foreign language teachers and the level of those same teachers’ job satisfaction within the Defense Language Institute Foreign Language Center (DLIFLC) in Monterey, CA.

Methodology: The study employed a quantitative method using descriptive and inferential statistical tests to answer the research questions. The sample population included 165 foreign language classroom teachers within the undergraduate basic language training at the DLIFLC. The data were collected through the Servant Leadership Questionnaire (Barbuto and Wheeler, 2006) and the Teacher Job Satisfaction Questionnaire (Lester, 1982). …

Steric Effects On The Formation Of Manganese Oxide Clusters And 2-Dimensional Ammonium Formate Architectures, Carl Oberle

Dissertations

It has been demonstrated by the Beatty group that altering the identity of the ortho-substituent of a dianiline counterion affects the assembly and dimensionality of a cadmium-chloride layer from 2-D to 0-D. This work seeks to extend this finding to metal oxide and organic hydrogen-bonded materials. By systematically increasing the ortho­-substituent’s size on the benzoate building block of reported manganese oxide clusters, of formula Mn_xO_y(O₂C-R)_zL_w (where R = Alkyl, L = neutral monodentate ligand), we aim to impact the self-assembly of these materials relative to their parent …

A Multilevel Model Of Poverty, Community Factors, And Learning For Students With Disabilities., Randal Barnes

Dissertations

Students with disabilities face challenges to academic success that can be exacerbated by the effects of poverty. In this study, Hierarchical Linear Modeling (HLM) was used to analyze the effects of socio-economic status, social capital, and threats to safety on literacy test scores for students with disabilities. Results of the analysis indicate that discipline rate had a significant effect on mean district scores on statewide standardized tests, but not on the impact of socio-economic status on test scores. Conversely, the percent of college graduates in a school district did not have a significant effect on district scores, but moderated the …

Interactions And Pathogen Transmission Between Carnivores In Madagascar, Fidisoa Rasambainarivo

Dissertations

Introduced carnivores exert considerable pressure on native predators through predation, competition and disease transmission. Improved understanding of determinant factors of interactions and pathogen transmission between introduced and endemic wildlife may help to predict disease emergence, avoid pathogen spillover and help control outbreaks. Using non-invasive camera traps, I identified areas where transmission of pathogens might happen through records of shared space-use within a protected area in Eastern Madagascar. I showed that indirect interactions between animals were more likely to occur near the research station which may constitute a disease transmission hotspot for carnivores in the landscape. Secondly, I investigated the associations …

Chemical Synthesis Of Staphylococcal Oligosaccharides, Satsawat Visansirikul

Dissertations

The Gram positive, cluster forming bacteria Staphylococcus aureus belongs to the family of opportunistic pathogens that may cause blood stream infections when the integrity of skin is broken and the immune system can no longer fight the infection. S. aureus has become one of the most frequent causes of infections in newborns, surgical patients, trauma and burn patients, patients receiving an implant, and dialysis patients with high mortality rates. As a matter of fact, S. aureus has become one of the largest public health and economic impacts amongst all bacterial infectious diseases worldwide. This situation is further complicated by the …

Promoting Student Empowerment Through Autonomy Supportive Practices: Examining The Influence Of Professional Development For Primary Grade Teachers, Diane Dymond

Dissertations

Adult practices and school systems disempower students when they stifle student voice and choice and focus on punishment rather than restorative practices. When teachers use autonomy supports in their classrooms, they promote student empowerment. The purpose of this Dissertation in Practice (DIP) was to create, implement and assess professional development (PD) designed to positively influence teachers’ orientations toward supporting student autonomy. This dissertation presents a quasi-experimental study utilizing an experimental and comparison group of teachers from two different elementary schools. Both groups participated in PD. PD was designed for the experimental group to study student empowerment through autonomy supports and …