Digital Commons Network^™

The Writing Development Of Multilingual Youth In A Spanish Immersion School, Angela Billur Layton

Dissertations

Language immersion schools offer students from diverse backgrounds with an opportunity for language enrichment education. Yet few studies attend to students’ perspectives on writing and multilingualism in immersion schools. The purpose of this study was to explore how four students from different linguistic and cultural backgrounds were developing writing and multilingual competencies at their Spanish Immersion Elementary School (SIES). This research investigated children’s emerging theories of writing and how school policies afforded and constrained practice. Further, this study examined the developmental trajectory of one trilingual student’s writing over time. This qualitative inquiry drew from two research traditions: ethnographic case study …

The Public Consequences Of A Personal Choice: The Impact Of The Decision To Be Childfree In Family-Friendly America, Emily Ingalls

Dissertations

The topic of diversity and inclusion has garnered increased interest over the past decade, with 78% of executives listing the topics as critical initiatives (Forbes, 2011). One group that has received little attention but continues to be stigmatized is the childfree population, or those individuals who deliberately choose not to have children. Previous research has examined opinions of this group generally and in the workplace, specifically, but this research frequently considers childfree and childless people under the same umbrella. This study examined ratings of the childfree in the workplace compared to childless adults as well as to parents. The potential …

Development Of An Hplc-Based Oligosaccharide Synthesizer, Salvatore Pistorio

Dissertations

Carbohydrates are the most abundant molecules on Earth. They are involved in a wide range of fundamental biological processes: anti-inflammation, immune response, joint lubrication, cell growth, antigenic determination. Carbohydrates are also held responsible for many damaging cellular processes, such as bacterial and viral infections, development of tumors, etc.. Therefore, the development of effective methods for the synthesis of complex carbohydrates has become a critical area of glycosciences. One challenge that stands out is the stereocontrol in the synthesis of glycosidic bonds, the linkage that serves as the only means to connect simple monosaccharides into complex oligomeric networks. Beyond this, the …

Historical Biogeography, Spatial Distribution, And Within-Host Interactions Of Avian Haemosporidian Parasites (Apicomplexa, Haemosporida), Leticia De Souza Soares

Dissertations

This dissertation addresses several aspects of the biogeography and evolution of avian malarial parasites (Haemosporida: Plasmodium and Haemoproteus), and the interactions of these pathogens with their hosts and other avian blood parasites. In Chapter 1, I investigate change in haemosporidian assemblages on the West Indies over millennial time scales, taking advantage of the historical isolation of islands by postglacial rising sea levels. I found that, the prevalence of parasite lineages is highly dynamic over periods from decades to thousands of years. Turnover of lineages requires more time than variation in lineage prevalence, suggesting that competitive exclusion of parasite lineages, likely …

Implications Of Diverse Peer Interactions On Body Image Satisfaction And Cosmetic Surgery Acceptance Among College Students, Shamekia Labrittney Woods

Dissertations

Whereas body image satisfaction and cosmetic surgery acceptance has been widely studied over the last 30 years, these topics as they pertain to college students have not been examined extensively—most notably, the implications that diverse peer interactions have on students’ body image satisfaction and their acceptance of cosmetic surgery as a means of improving body image. Diverse peer interactions refer to interactions among peers of different racial and/or cultural backgrounds. For many college students, college provides the first opportunity whereby students may interact and engage to a great extent with students from racial and cultural backgrounds different from their own. …

Examining The Combined Effects Of Dissolved Oxygen, Temperature, And Body Size On The Physiological Responses Of A Model Macrobenthic Polychaete Species, Capitella Teleta, Kelsey Burns Gillam

Dissertations

While the scientific community is in consensus that coastal systems are threatened by climate change, few climate change studies test the effects of more than one variable directly related to climate change. The dissolved oxygen (DO) levels of the ocean are currently subject to both global warming and eutrophication; 94% of all hypoxia zones are expected to experience >2°C increase by 2035. This dissertation aims to examine how a model organism responds to simultaneous thermal and DO stress involving four levels of DO (100%, 70%, 50%, and 20%) saturation and three temperatures (15°C, 20°C, and 25°C).

The polychaete, Capitella teleta …

Epidemiology Of White Spot Syndrome Virus In The Daggerblade Grass Shrimp (Palaemonetes Pugio) And The Gulf Sand Fiddler Crab (Uca Panacea), Muhammad

Dissertations

Ever since the first outbreaks of White spot syndrome virus (WSSV), which causes White Spot Disease (WSD), in Asia in the early 1990s, the pathogen has been a major constraint to the profitability of the shrimp aquaculture industry across the globe. WSSV has a broad host range and is routinely detected in wild decapod crustaceans. In the present study, two common species in the tidal salt marsh along the northern coast of the Gulf of Mexico, the daggerblade grass shrimp (Palaemonetes pugio) and the Gulf sand fiddler crab (Uca panacea), were investigated for their role as …

A Microbiomic Approach To The Characterization Of The Impacts And Influences Of Viral, Bacterial, And Harmful Algal Bloom Toxins On The Bottlenose Dolphin, Corey David Russo

Dissertations

As apex predators that display high site fidelity Tursiops truncatus (bottlenose dolphin) are indicators of marine ecosystem health. Bottlenose dolphins, additionally, display pathogenesis and immune response similar to that of humans. Humans and coastal bottlenose dolphins, in particular, are constantly exposed to the same industrial, agricultural and domestic toxins and pathogens, contaminants and pollutants. Thus, studies on the bottlenose dolphin are also valuable in bridging the gap between ocean and human health. Bottlenose dolphins are susceptible to viral bacterial and toxin infection. Infection in the bottlenose dolphin manifests itself in the form of mass stranding events, unusual mortality events, chronic …

Evolution In Light Of Mitonuclear Landscapes: An Examination Of Mitochondrial Replacement In Killifish (Fundulus Spp.), Stephen D. Flanagan

Dissertations

The mitochondria are responsible for the bulk of energy production in eukaryotes. They possess their own genome that works in conjunction with the nuclear genome to accomplish the extraordinarily important task of energy conversion. When species hybridize there will be a mismatch in evolutionary histories between these two genomes. The deleterious interactions of these genomes have been studied in great detail (i.e. hybrid breakdown). However, little work has been conducted to understand the population genetic, and morphological consequences of wide-ranging replacement. The Fundulus notatus complex is comprised of 3 species: F. notatus, F. olivaceus, and F. euryzonus. …

Measuring The Effectiveness Of A Two-Period Algebra Class: A Program Evaluation, Tracey K. Landry

Dissertations

This paper details a program evaluation of a two-period freshman Algebra course in a two-high school district. The study examines the degree to which the two-period course is an effective intervention for freshman math students as compared to the one-period freshman Algebra course by reviewing student assessment data, student growth indicators, and course enrollment data. In addition to quantitative data, student, teacher, and administrator perceptions of the course inform the investigation into the two-period remedial math class. The paper concludes that the two-period math program is not having the desired impact and should be reconfigured or reconsidered altogether.

African American Men’S Health: Regulating Race-Related Stress Through Cognitive Flexibility, Brian P. Littleton

Dissertations

African American men have one the highest preventable mortality and morbidity rates in the United States (Rich, 2000; U.S. Department of Health and Human Services, 2015). Moreover, there is substantial health disparity between African American men and White men in the United States (Smedley, Stith, & Nelson, 2003). It has been stated that pervasive racism and discrimination are the most significant contributors for the disparity. Studies have shown race-related stress, which is derived from experiencing racism, discrimination or having internalized feelings as the result of an individual’s racial status, has been associated with blood pressure, emotional distress, and physical health …

Counselor Preparation And Adolescent Youth: A Study Of Clinical Mental Health Counselors, Brian R. Russ

Dissertations

Prevalence data have raised concerns that child and adolescent mental health issues are at an epidemic level. For example, Knopf, Park, and Mulye (2008) suggested that 20-25% of all youth experience symptoms of distress. Researchers have also estimated that one in five adolescents in the United States have a diagnosable mental health disorder, and one in ten with a disorder that would be considered severe (Kessler, Berglund, Demler, et al., 2005; Knopf, Park, & Mulye, 2008). Yet, the training of clinical mental health counselors who work with adolescent populations has received limited attention in the counselor education literature. Although the …

Minority Middle And High School Students' Interest In Science: An Exploration Of Teachers' Perceptions, Caroline Makere

Dissertations

A high school teacher conducted a study about minority middle and high school students’ interest in science. The problem was to find out why African American and Hispanic students were showing very little interest in science. The researcher used four middle school science teachers and nine high school science teachers, all from inner city schools in a big city of the Midwest United States except for one middle school teacher from a nearby suburb. The participants answered a survey questionnaire followed with a face-to-face recorded interview. The findings of the study confirmed that students showed little interest in science due …

A School District's Change To Standards-Based Grading: A Conduit To Student Learning, Perry A. Finch

Dissertations

Nothing can be more important in a student’s learning process than feedback. This study looks at what is needed to effectively guide an elementary school district from a traditional letter grade system to a standards-based grading system. Survey data were collected from 91 teachers across the district in order to measure their understanding of standards-based grading. A standards-based grading pilot was conducted with six teachers from the elementary and middle school level. Four of these six teachers participated in a group interview to share perceptions of this pilot. Survey data were collected from the 54 students involved in the pilot. …

A Quantitative Analysis Of Factors Influencing The Professional Longevity Of High School Science Teachers In Florida, James Alexander Ridgley Jr

Dissertations

This dissertation is an exploratory quantitative analysis of various independent variables to determine their effect on the professional longevity (years of service) of high school science teachers in the state of Florida for the academic years 2011–2012 to 2013–2014. Data are collected from the Florida Department of Education, National Center for Education Statistics, and the National Assessment of Educational Progress databases. The following research hypotheses are examined: H₁ – There are statistically significant differences in Level 1 (teacher variables) that influence the professional longevity of a high school science teacher in Florida. H₂ – There are statistically significant …

Habitat Use By Bottlenose Dolphins, Tursiops Truncatus, In Roanoke Sound, North Carolina, Shauna Marisa Mcbride

Dissertations

Information on the habitat use of a species is important to develop conservation efforts and management strategies for that species. Roanoke Sound, North Carolina is primarily a seasonal habitat for bottlenose dolphins, Tursiops truncatus, from late spring to early fall, but little information is known about how dolphins use this area. Transect survey data and opportunistic survey data collected by the Outer Banks Center for Dolphin Research from 2009 to 2015 were used to analyze dolphin habitat use. The objectives of this project were to: 1) identify areas that were important to dolphins, 2) determine which behaviors were observed …

Analysis Of Professors’ Perceptions Towards Institutional Redevelopment Of Brownfield Sites In Alabama, Berkley Nathaniel King Jr.

Dissertations

This study was conducted to analyze professors’ perceptions on the institutional redevelopment of brownfield sites into usable greenspaces. The U.S. Environmental Protection Agency (2011) refers to brownfields as sites, (either facility/land) under public law § 107-118 (H.R. 2869), which are contaminated with a substance that is classified as a hazard or a pollutant. Usable greenspaces, however, are open spaces or any open piece of land that is undeveloped, has no buildings or other built structures, and is accessible to the public (EPA, 2015).

Open green spaces provide recreational areas for residents and help to enhance the beauty and environmental quality …

Design And Synthesis Of Dynamic Covalent Polymer Scaffolds With Controlled Architectures, Emily Annette Hoff

Dissertations

The design and synthesis of functional, controlled polymer architectures is essential to the development of new materials with precise and tailorable properties or applications. The work described in this dissertation focuses on the development of controlled polymer architectures with dynamic linkages for the design of multifunctional materials and surfaces via robust, efficient, and stimuli-responsive strategies.

In Chapter III, a post-polymerization modification strategy based on ambient temperature nucleophilic chemical deblocking of polymer scaffolds bearing N-heterocycle blocked isocyanate moieties is reported. Room temperature RAFT polymerization of three azole-N-carboxamide methacrylates, including 3,5-dimethyl pyrazole, imidazole, and 1,2,4-triazole derivatives, afforded reactive polymer scaffolds …

Electrogenerated Chemiluminescence Study Of Semiconductor Nanoparticles Towards Sensitive Detection Of Biomolecules, Yiliyasi Wusimanjiang

Dissertations

The main focus of this dissertation is to unfold the fundamental aspects of electrogenerated chemiluminescence (ECL) generation from semiconductor nanoparticles (also known as quantum dots or QDs) within different ECL systems. The ECL and photo-physical interactions between the CdTe QDs (λ_emission= ~760 nm) and the CdSe QDs (λ_emission= ~550 nm), as well as the effects of carbon nanotubes on ECL of QDs were separately investigated. Optimum experimental conditions for peptide bond formation on an electrode surface through EDC (1-ethyl-3-(-3-dimethylaminopropyl) carbodiimide hydrochloride)/NHS (N-Hydroxysulfosuccinimide) coupling were also revealed using cyclic voltammetry technique. Based on the information …

Investigating The Functional Role Of Tick Antioxidants In Hematophagy And Vector Competence, Deepak Kumar

Dissertations

Ticks are obligate hematophagous arthropods and harbor several pathogens which transmit various diseases to humans and their domesticated animals. Host blood- digestion in a tick midgut (MG) generates several reactive oxygen species (ROS), which are extremely toxic to essential macromolecules (e.g. DNA, proteins, and lipids) within the cell, resulting in high oxidative stress. Thus, this dissertation focuses on the questions of how tick homeostasis responds to high oxidative stress, and how ticks and their harbored pathogens survive the high surge of oxidative stress during blood digestion. We are specifically interested in the tick-pathogen, Rickettsia parkeri (R. parkeri, Rp), harbored by …

Understanding Adolescents' Unique Experience Of Happiness Within The Family: Bridging Multiple Perspectives Of Adolescents, Parents, And Siblings, Marsha Cohen

Dissertations

The purpose of this phenomenological study was to explore the essence of middle adolescents'; unique experiences of happiness within the family system from the multiple perspectives of adolescents, their parents, and their siblings. Another goal was to make thematic comparisons between and within families in order to better understand the complexity and development of the phenomenon for adolescents. Seven families participated in this study. Each family consisted of a middle adolescent, a parent, and a sibling, yielding a total of 21 participants. A semistructured interview was conducted with each participant. Data were analyzed using Moustakas's (1994) modification of the Stevick-Colaizzi-Keen …

The Bayesian Method Of Estimation For The Number Of Latent Classes In Growth Mixture Models, Chittanun Sitthisan

Dissertations

It is widely accepted that blindly specifying an incorrect number of latent classes may result in misidentifying the class membership of observations and in inconsistently estimated parameters. The current dissertation examined the Bayesian method to estimate the number of latent classes in growth mixture models. The procedure for estimating the number of latent classes was developed via Markov chain Monte Carlo using the Metropolis-Hastings algorithm. The key idea was to construct the likelihood function and then specify the prior information toward the number of latent classes (K), and then calculate the posterior distribution for K. Simulated observations were generated by …

Examining Teachers' And College Students' Perspectives Toward E-Textbooks As An Educational Tool, Nariman Ali Alawami

Dissertations

The purpose of this research was to understand the perspectives of teachers and students regarding their use of specific e-textbooks in a higher education learning environment. The e-textbooks used by the teachers and students were examined in order to determine functions and features to focus on during the inquiry. This study was particularly interested in the design of e-textbooks and how they are used by both teachers and students in the learning process. The participants in the research were also prompted to suggest improvements to e-textbooks. A case study approach was used as the methodology to examine three teachers represented …

Faculty's Knowledge, Pedagogy, And Integration Levels In The Implementation Of Ipads As An Instructional Tool, Xin Wang

Dissertations

Current literature showed there is a need to help faculty improve their iPad integration practices. Using a sequential mixed-methods design, the researcher explored the relationship among faculty’s iPad integration levels, their teachers’ knowledge (TPACK), and pedagogy among faculty members who had integrated iPads into their teaching for at least two semesters. The data were collected with a cross-section questionnaire, follow-up interviews and artifacts. Responses were collected respectively with the three sections of the questionnaire: iPad Usage (N=160), TPACK (N=151), and demographics (N=147). Eight participants were interviewed after the survey. The results indicated TPACK and learning-centered pedagogy were necessary but insufficient …

Biology Laboratories At A Distance: A Case Study And Experiment Of Ecology And Evolution Labs With Community College Students, Beverly E. Ranney

Dissertations

Community colleges deliver more courses online; laboratory-based courses face challenges in how to do this. This study examined how ecology and evolution laboratories could effectively be delivered in an online biology community college course. Virtual simulations and hands-on, at-home kits were used in two groups. Results showed that students using the virtual simulations had higher learning gains and more positive perceptions towards their laboratory experiences than those students using athome kits. By evaluating learning gains on a pretest/posttest and utilizing interviews and focus groups, this research concluded that virtual simulations offered a superior learning experience for online learners. The results …

Crystallography And Magnetism Of Magnetocalorically Important Ni-Mn-X Based Heusler Alloys, Amila S. B. Madiligama

Dissertations

Ni-Mn-X Heusler alloys, demonstrating strong coupling between crystalline structure and magnetic state, were studied. They undergo field-induced, first-order transformations from a low symmetry martensite to a high-symmetry austenitic phase around room temperature. The substantial difference between the entropies of the two phases results in a large adiabatic temperature change, called “Giant Magnetocaloric Effect (GMCE)”. Consequently, these alloys are promising refrigerants for near-room temperature cooling systems. This magnetic cooling is an energy-efficient and eco-friendly technology.

Crystalline structures and magnetic states of these alloys, which determine their magnetocaloric performances, highly depend on their composition. To examine new paths to optimize their magnetocaloric …

Predicting Purpose: An Examination Of Early Predictors Of Progression And Career Choice Among First-Year Nursing Students, Iris Hinderliter

Dissertations

The importance of socializing upper level nursing students into the nursing profession is well established in the literature, but less is known about the early predictors of progression and career choice among first-year nursing students using a career development framework. Understanding early predictors of progression, particularly for first generation and underrepresented minority college students, have important implications for diversifying the baccalaureate-prepared nursing pipeline, as well as for developing future career and educational interventions for program completion and student retention. This study utilized a cross-sectional, correlational design to examine predictive factors of progression and career choice among freshmen nursing students. While …

The Academic Impact Of Extracurricular Activities On Middle School Students, Lauren Jansen

Dissertations

This research study examined the academic impact of extracurricular activities on middle school students. This study investigated a possible relationship between the amount of hours that students spent participating in extracurricular activities and their academic achievement, as well as the amount of hours that students spent participating in in-school extracurricular activities and their academic achievement. This study used a combination of quantitative and qualitative data to reach its results. The quantitative data ultimately did not show a statistically significant correlation between the hours that students spent in extracurricular activities in general or in in-school activities and academic achievement. However, there …

Comparison Of Classroom Grades And Missouri End-Of-Course Exam Scores, Rodney Delmont

Dissertations

Educational leaders are tasked with finding the best practices for motivating students and accurately reporting progress (Popham, 2011). Additionally, the alignment of curriculum, assessment, and pedagogy can facilitate changes in education (Klenowski & Wyatt-Smith, 2014). Therefore, as districts align curriculum to assessment standards, students’ scores on assessments should increase (Squires, 2012). The purpose of this study was to determine if a correlation exists between Missouri English II end-of-course (EOC) exam scores and student grade-point averages (GPAs) earned in English II. Moreover, data were examined to determine if a correlation exists among student gender, Missouri English II EOC scores, and student …

Implementation Of A Mentor Led Physical Activity Program Among Disadvantaged Youth, Karen M. Martin

Dissertations

Physical activity is an integral part of the war on pediatric obesity. Pediatric obesity is a worldwide epidemic affecting children of all races, classes, and gender. According to the Ohio Youth Risk Behavior Survey of 2013 over one third of Ohio children in grades nine through twelve were considered overweight or obese and engage in more than three hours of screen time, television, computers or video games daily. The purposes of this project was to introduce physical activity in the classroom environment in the form of physical activity breaks, led by physical activity leaders (PALs) to achieve improved BMI category, …