Digital Commons Network^™

Activity Of The Beta-Cyanoalanine Synthase Pathway Is Associated With The Response To Abiotic Stress By Arabidopsis Thaliana., Marylou Machingura

Dissertations

Cyanide is produced throughout a plant's life cycle alongside the hormone ethylene by oxidation of 1-aminocyclopropane-1-carboxylic acid. Production increases during certain developmental stages such as seed germination, seedling elongation, fruit ripening and senescence. Abiotic stresses increase ethylene production giving rise to `stress cyanide'. Cyanide also comes from metabolism of cyanogenic compounds. Cyanide is however, a toxic chemical which readily binds to metallo-enzymes inhibiting primary metabolic processes. Plants have mechanisms to maintain cyanide homeostasis such as the β-cyanoalanine pathway whereby cysteine reacts with cyanide forming β--cyanoalanine, mediated by β-cyanoalanine synthase and cysteine synthase. A dual nitrilase 4 enzyme then converts the …

Effects Of D-Galactose Treatment And Moderate Exercise On Spatial Memory In Rats, Amanda R. Austin

Dissertations

Cognitive decline is a process frequently associated with aging. Physical exercise appears to counteract cognitive decline, specifically spatial abilities, and decreases the effects of reactive oxygen species (ROS) associated with aging. In addition, brain derived neurotrophic factor (BDNF) and glial derived neurotrophic factor (GDNF) are well recognized as chemical mediators of the neurophysiological benefits of exercise.

In order to study the impact of exercise on spatial memory and neurotrophic factors, this study utilized an animal model of accelerated aging involving chronic d-galactose administration. Specifically, previous research indicates daily injections of d-galactose for 6-10 weeks may increase ROS in mice and …

Rule-Based Precise Localization Services In Mobile Environments, Mohammed Elbes

Dissertations

In recent years there has been great interest in the positioning of people and assets in indoor and outdoor environments. Many systems were constructed to accomplish this. The application of these systems depends on the environment and the precision required for localization. The Global Positioning System (GPS) cannot be used for a precise indoor localization due to the attenuation and scattering of the signals. For indoor environments, other technologies like Wireless LAN, laser, camera images and motion sensors are used in precise localization. GPS can be used in outdoor environments but if localization accuracy is a critical requirement, other technologies …

Equine-Assisted Psychotherapy: A Descriptive Study, Erica Jex Gergely

Dissertations

The current study seeks to examine the program operations and treatment practices of individuals and organizations providing equine-assisted therapy services nationwide. Currently, there are several hundred programs across the United States that utilize equine-assisted therapy to treat common mental health problems in children, adolescents, and adults. Not all equine therapy programs function under the same theoretical model and therefore do not deliver treatment services using equivalent principles or techniques. In addition, program policies, procedures, and ethical guidelines of each provider vary. To date, there exists a paucity of research regarding equine-assisted therapy including both qualitative and quantitative data.

The present …

Performance On A Data Entry Task When Participants Receive Three Different Types Of Graphic Feedback, Sarah E. Vanstelle

Dissertations

This purpose of the present study was to compare the effects of three types of graphic feedback on worker performance and satisfaction. The first type displayed individual performance (IF), the second displayed individual performance and average group performance (SCF-GA), and the third displayed individual performance for each individual in the group (SCF-IP). Participants were 54 undergraduate students who were randomly assigned to one of the three groups. They performed a computerized data entry task that simulated the job of a medical data entry clerk. The primary dependent variable was the number of correctly completed patient records. Secondary dependent variables included: …

An Examination Of Mature Interpersonal Relationships Among International And American College Students, Bona Aidoo

Dissertations

Educating students to relate harmoniously with people from different backgrounds has become an important agenda for student affairs professional because of the increasingly diverse nature of the American society. The purpose of this study was to assess how American and international college students develop mature interpersonal relationship skills. All the participants were from a mid-sized comprehensive institution in the Southern United States. The two main constructs measured were tolerance and quality of relationships. Attempts were also made to identify other predictors that may influence mature interpersonal relationships: gender, age, educational level, and academic achievement as measured by GPA. Both quantitative …

Mortality Salience And Worldview Defense, Toni Brooke Merkey

Dissertations

Research generated from Terror Management Theory has demonstrated that reminding participants of their eventual death increases self-esteem striving and worldview defense (Pyszczynski, Greenberg, Solomon, Arndt, & Schimel, 2004). The hypothesis in the present study is that individuals higher in emotion dysregulation will engage in higher levels of worldview defense than those lower in emotion dysregulation. This hypothesis was based on the assumption that individuals high in emotion dysregulation will have a greater need to regulate their emotions by engaging in worldview defense after being asked to think about their own death than will non-emotionally dysregulated individuals. To test this hypothesis, …

Werner Jaegerhuber's “Messe Folklorique Haitïenne”: A Conductor's Guide, Lauren Michelle Brandon Lindsey

Dissertations

Werner Jaegerhuber (1900-1953), a composer and leading ethnographer from Haiti, lived a life and career committed to bringing the folk music of Haiti to international recognition. His most significant work, Messe Folklorique Haïtienne, the background leading to its composition, performance of the work and a conductor’s analysis is the focus of this study. The folk music of Haiti consists primarily of Vodou melodies which are performed in Vodou ceremonies. Haiti’s long history of colonization, slavery, chronic economic struggle, African roots, and Catholic influence all play unique, but significant roles in the life of Werner Jaegerhuber and his passionate study. …

Seeing The Chemistry Around Me – Helping Students Identify The Relevance Of Chemistry To Everyday Life, Tracy Lynn Moore

Dissertations

The study attempted to determine whether the use of a series of reading and response assignments decreased students’ perceptions of chemistry difficulty and enhanced students’ perceptions of the relevance of chemistry in their everyday lives. Informed consent volunteer students enrolled in General Chemistry II at a community college in the southeastern United States during the Spring 2012 semester participated in this study. Students were assigned to read a series of short articles that connect chemistry to a specific aspect of everyday life and then answer a series of questions for each article. Open-response research instruments (initial questionnaire and final questionnaire) …

Professional Learning Communities, Self Efficacy, And Collaborative Learning In The Elementary School, Diana Provancha Sweigart

Dissertations

The United States of America used to have the best high school graduation rate in the world. However, by 2006, the U. S. was ranked 18 out of 26 among industrialized nations (Organization for Economic Co-operation and Development, 2010) with three out of every ten public school students failing to complete high school with a diploma (DuFour and Marzano, 2011). This urgent, pressing issue warrants continuing research to discover what does and does not work in educating our children. Numerous empirical and scientifically-based research studies continue to show the validity of several teaching methods; one such strategy is cooperative learning, …

Image Bodies, Avatar Ontologies: Rendering The Virtual In Digital Culture, Adam M. Davis

Dissertations

In 2009 five avatar-themed films were released, one of which became the highest grossing film to date, signaling that in addition to their popularity in videogames and virtual worlds, avatars are culturally salient figures which demand scholarly attention. Avatars, virtual environments, and user behavior have evolved significantly since virtual reality captured public and academic attention at the close of the twentieth century, and this dissertation is an attempt to theorize the avatar in contemporary digital culture. By interlacing new media philosophy and analyses of cinematic texts I situate the avatar at the nexus between digital images and interactive bodies, with …

Million Dollar Plus Donors Within Intercollegiate Athletics: A Qualitative Analysis Of Donor Motivations, Nancy Carol Hixson

Dissertations

No abstract provided.

An Investigation Of Preservice Teachers' Perceptions Of Locus Of Control, Self-Regulation, And Motivation In Online Learning, Sung-Ho Min

Dissertations

No abstract provided.

The Development Of Mennonite Music In The Congo: A Study In Musical Thought, Jill Michelle Schroeder-Dorn

Dissertations

The purpose of this study was to examine musical thought among members of the Congolese Mennonite Church. Established and governed by missionaries, the music practices of the Church were initially modeled after Western services, which consisted of church choirs and four-part hymn singing. Congolese who chose to convert to Christianity had to adapt to a new musical system, which included not only properties of musical sound, but also concepts surrounding the music making experience, including what music is and what it has the power to accomplish. The church has now been in existence for over one hundred years, and musical …

Health Literacy, Cognitive Impairment, And Medication Adherence In Veterans With Heart Failure, Lee Ann Hawkins Phd

Dissertations

Background: Heart failure (HF) affects 5.8 million people in the United States, costly in terms of patient mortality and morbidity as well as healthcare dollars. One important manifestation of poor HF outcomes is the excessive admission-readmission cycle. Non-adherence to medication is responsible for the majority of HF readmissions. Identification and intervention for key factors contributing to poor medication adherence is critical to improving outcomes. Two such factors prevalent in persons with HF are cognitive impairment (CI) and poor health literacy (HL). There is a paucity of tested interventions designed to improve medication adherence by addressing underlying CI or HL. A …

A Quantitative Content Analysis Of The Common Core State Standards Compared To Missouri’S Grade-Level Expectations Using The Revised Bloom’S Taxonomy Framework, Toni Gallia

Dissertations

With the pressure in education to develop a 21st century learner with higher-level thinking skills, many educators connected previous state curriculum to the Common Core State Standards (CCSS). Missouri’s Department of Education experts paired the previous state’s curriculum known as the Missouri Grade Level Expectations (MO GLEs) with a corresponding CCSS based on Webb’s depth-of-knowledge model in a document commonly referred to as the Missouri Crosswalk. This quantitative content analysis study compared the MO GLEs and CCSS by quantifying the language using an adapted and revised Bloom’s taxonomy framework. This study tested for a cognitive difference in means and for …

Exploring Congruency Between John A. Henschke‘S Practice And Scholarship, Lori Risley

Dissertations

The study aimed to explore how John A. Henschke‘s practice mirrors the andragogical theory espoused in his scholarship. This study offered interpretations held by three groups of individuals: colleagues, students, and John, utilizing 10 data sets. Data sets include: a) Focus group-current students, b) Modified Instructors Perspectives Inventory for Students pre/ post course surveys, c) Section of the Instructors Perspectives Inventory, d) Course evaluations, e) Video recordings of John facilitating , f) Interviews; colleagues, students, and John, g) Observations, and h) Selection of scholarship. Each contained interpretations and perceptions that, when held up to the mirror of John‘s scholarship, reflected …

Children Museum Experience: Exploratory Study Of Potential Of Museum Visits In Achieving Learning Goals Of Irish Ecec Curriculum Framework Aistear, Anna Ćwidak

Dissertations

This qualitative study examines the potential of museum visits in achieving learning goals of Early Childhood Education and Care as listed in the Irish ECEC Curriculum Framework Aistear. Data obtained through interviewing professionals of both ECEC and museum education sector has been compared and confronted with the literature available. The study focuses on three main areas.

Firstly, it looks at the learning goals listed in Aistear and attempts to link them with the potential outcomes of children’s museum visits. The interviewees were asked to recognise and comment on learning experience that ECEC groups participate in during an outing to a …

Temporal Characteristics Of Monoptic, Dichoptic And Half-Binocular Collinear Lateral Masking Of Contrast Detection, Wesley Tod Kinerk

Dissertations

Purpose: The temporal characteristics of dichoptic contrast integration across space in primary visual cortex are relatively unknown. This study investigated the effect of varying interstimulus interval (ISI) and flank duration on contrast detection threshold (CDT) of a sinusoid target under monoptic, dichoptic and half-binocular viewing. Methods: Eleven subjects with normal vision participated for a mean of 25 hours each. In the main experiment, target and flanks were 3 cpd vertical sinusoids with 6 lambda (sigma = 1.5 lambda) center-to-center vertical separation. Flank contrast was normalized to 3X flank CDT. Flanks were presented at 4 durations (67-500ms) and ISIs were presented …

The Cultural Complex Of Innocence: An Examination Of Media And Social Construction Of Missing White Woman Syndrome, Sarah Land Stein

Dissertations

This study examined the etiology and promulgation of the sociological phenomenon known as missing white woman syndrome. It was hypothesized that missing white woman syndrome may not be entirely attributable to racial disparity as has been claimed in the past. Rather, citing the work of Dr. Carl Jung, the researcher believed that missing white woman syndrome may be partially explained by a concept known as a cultural complex. The cultural complex that was hypothesized for purposes of this study is one related to innocence: That is, as a western society, we have been culturally overexposed to the blonde, Caucasian female …

Eco-Theatre And New Media: Devising Toward Transnational Balance, Marnie Jane Glazier

Dissertations

This dissertation seeks to address the pivotal ecological and technological realities of the twenty-first century, currently giving rise to new patterns of existence and new paradigms of human inquiry. This study will ask how technological innovation and environmental urgency have altered the ways in which human beings think, and thus perceive the world around them, changing human behavior, or non-behavior, and calling forth new imperatives for the arts, and namely for the Theatre. Most significantly, the dissertation attempts to traverse the shadow-lands, between our ecologies and our technologies, exploring those essential points of convergence in the borderlands where Eco-Theatre and …

Mine Detection Rats: Effects Of Repeated Extinction On Detection Rates, Amanda M. Mahoney

Dissertations

In recent years, giant African pouched rats (Cricetomys gambianus) have been used successfully for detecting landmines in Mozambique. The rats are trained to detect mines through the use of operant conditioning techniques, in which the indicator response (stopping and digging) is rewarded (reinforced) with food when it occurs within one meter of a landmine and not rewarded when it occurs under other circumstances. Because handlers do not know the location of landmines when the rats are used operationally, and therefore cannot ascertain if an indication response is correct (near a mine) or incorrect, no rewards are delivered in …

Regulation Of Expression Of Enterohemolysin Toxin By The Global Repressor Hns And Characterization Of A New Class Of Protein Produced By Shiga Toxin-Producing Escherichia Coli, Miles T. Rogers

Dissertations

Shiga toxin-producing Escherichia coli (STEC) are worldwide pathogens causing an estimated 200,000 infections per year in the United States. Infections with STEC sometimes progress to kidney failure ending in death. Two studies presented below describe a novel virulence factor and mechanisms required for pathogenesis of STEC seropathotype 091 :H21.

First the novel protein, YghJ, was identified and found to be conserved amongst extraintestinal and diarrheal seropathotypes of E. coli with similar proteins carried by pathogens such as Vibrio cholerae. When the yghJ gene was disrupted creating a YghJ null mutant, the defect resulted in a significant growth deficiency in …

The Relationship Between Suicide Ideation And Parasuicide: An Electrophysiological Investigation Using The Loudness Dependence Of Auditory Evoked Potential, Angelika Marsic

Dissertations

The loudness dependence of the auditory evoked potential (LDAEP) has been proposed as a promising valid and a non-invasive indicator of behaviorally relevant central 5-HT functioning. There is limited research on the utility of the LDAEP in discriminating individuals who engage in various degrees of suicidal behavior. The primary purpose of the present study was to examine if the LDAEP, as a measure of central serotonergic functioning, can be useful in distinguishing groups of individuals who: (a) solely experience suicidal ideation (SI group); (b) experience suicidal ideation and have engaged in deliberate self-harm acts (SH group); and (c) individuals with …

Empirical Identification Of Axis I And Axis Ii Symptom Subtypes Of Sex Addiction Using Lateny Profile Analysis, Maria Isabel Nino De Guzman

Dissertations

Sexual addiction is a disorder characterized by lack of control over sexual urges, pathological relationships and lack of intimacy, mood-altering experiences, and adverse consequences that tend to be disregarded by the person affected. Although not classified as a mental disorder in the Diagnostic Statistical Manual-IV-TR (DSM-IV-TR, APA, 2000) this distressful sexual manifestation is increasingly recognized as a clinical and public health problem. Previous studies suggest commonalities with addictive disorders and maladaptive personality traits. The purpose of the current study was to analyze personality configurations of individuals diagnosed as sex addicts and uncover specific subtypes or profiles associated to sexually addictive …

Deepwater, Deep Ties, Deep Trouble: A State-Corporate Environmental Crime Analysis Of The 2010 Gulf Of Mexico Oil Spill, Elizabeth A. Bradshaw

Dissertations

The 2010 Gulf of Mexico oil spill was one of the worst environmental disasters of all time. Using the concept of state-corporate environmental crime, this project applies a case study analysis of secondary data sources including publicly available government reports, corporate documents, academic sources and journalistic accounts to examine the causes of the blowout and the response to the spill. Building on Michalowski and Kramer’s Integrated Theoretical Model of State-Corporate Crime, this study introduces an additional level of analysis- that of the industry- between the organizational and institutional levels.

The causes of the Deepwater Horizon explosion are rooted both in …

The Effects Of Repeated Resurgence Conditions On The Magnitude Of Resurgence, Ryan Nathaniel Redner

Dissertations

Resurgence is defined as the recurrence of a previously reinforced behavior, under the condition that reinforcer delivery ceases for a more recently reinforced behavior. The current study investigated the effect of repeating the resurgence procedure six times with pigeons and two times with rats to determine the effect of repetitions on the magnitude of resurgence. Three phases were repeated: (a) Response 1 was reinforced while there were no programmed consequences for Response 2, (b) Response 2 was reinforced and Response 1 was extinguished, and finally (c) there were no programmed consequences for either response. The results indicated that the magnitude …

Describing The Apprenticeship Of Chemists Through The Language Of Faculty Scientists, Brandy Ann Skjold

Dissertations

Attempts to bring authentic science into the K-16 classroom have led to the use of sociocultural theories of learning, particularly apprenticeship, to frame science education research. Science educators have brought apprenticeship to science classrooms and have brought students to research laboratories in order to gauge its benefits. The assumption is that these learning opportunities are representative of the actual apprenticeship of scientists. However, there have been no attempts in the literature to describe the apprenticeship of scientists using apprenticeship theory. Understanding what science apprenticeship looks like is a critical component of translating this experience into the classroom. This study sought …

Interpretations Of Student Engagement In The Context Of The Orff Schulwerk Music Classroom At The Dubard School For Language Disorders, Anna Rebecca Bondurant Halliday

Dissertations

The purpose of this multiple case study was to explore the lived experiences of four students with language disorders within the context of their Orff Schulwerk music class at the DuBard School for Language Disorders. In addition, the observational insights of their classroom teachers and the practitioner researcher were compared with the responses of the students in order to determine any discrepancies between the child’s awareness of his or her musical engagement and that of the observer. Using data collected from interviews, stimulated recall (Dempsey, 2010), and student generated artwork (Freeman & Mathison, 2009), I explored the lived experiences of …

Neonatal Isoflurane Exposure On Apoptotic Neurodegeneration And Long-Term Behavioral Functions, Susan E. Maloney

Dissertations

Clinical studies have reported multiple exposures to anesthesia are associated with an increased risk of later learning disabilities. The general anesthetic Isoflurane (ISO) is commonly used in pediatric anesthesia and decreases the activity of the central nervous system through activation of the GABAA receptor. Other drug classes, such as anxiolytics, anticonvulsants, and alcohol, that share this mechanism increase neuroapoptosis during the developmental brain growth spurt period. Exposure to these agents during this time also can have detrimental consequences on behavior. Two experiments were conducted to examine the acute neuroapoptotic response and long-term behavioral impact of postnatal ISO exposure using an …