Digital Commons Network^™

Unemployment, Does It Really Hurt?, Claudia Vargas

Theses and Dissertations

This paper analyzes the consequences of changes in the unemployment rate in Colombia on the level of education attained for adolescents. Increases in the unemployment rate are associated with an increase in the average number of years of education. No significant effect was found for men of the same age.

Food And Negotiation Of Identity Among The Russian Immigrant Community Of Brighton Beach, Elena Starkova

Theses and Dissertations

This thesis explores the construction of ethnic identity among Russian immigrants in New York, by examining how it has been negotiated and articulated through foods, including traditional and non-native foods as a vehicle for their shifting identities and for reaffirming their position and participation in mainstream American society.

The Sounds Of Silence; Or, Isabella’S Counter Discourse In Measure For Measure, Gina Vivona

Theses and Dissertations

This argument reshapes the thinking about masculine dominance in Measure for Measure, and considers the patriarchy as a series of socially constructed, hence artificial, rules and regulations. It also explores how Isabella’s discourse and celibacy empower her to defy the constraints of early modern paradigms and achieve individual freedom.

Reward Preferences In Domestic Horses (Equus Caballus), Elizabeth E. Jaeger

Theses and Dissertations

The present study examined stress response in domestic horses (Equus caballus) to determine if horses show preference for either traditional or natural horsemanship training methods to test the hypothesis that natural horsemanship would induce less stress. Our results show that natural horsemanship rewards elicited lower stress response in horses.

On The Cardiac Elastic - 3d Geometrical, Topological, And Micromechanical Properties, Xiaodan Shi

Theses and Dissertations

In cardiac biomechanics, there is an apparent knowledge gap in 3D cardiac elastin structure and its biomechanical roles. In this study, we fill this knowledge gap via novel biomedical imaging and bioengineering means. In Aim 1, we created an overall mapping of 3D microstructures of the epicardial elastin fibers on porcine left ventricles (LV) using a laser scanning confocal microscope. We demonstrated the location- and depth-dependencies of the epicardial elastin network. Histological staining was also applied to reveal the patterns of endocardial and interstitial elastin fibers, as well as elastin fibers associated with the Purkinje fibers. In Aim 2, a …

Assessment Of Factors Influencing Sale Price In Mississippi Feeder Calf Board Sales, Elizabeth Anne Caldwell

Theses and Dissertations

The objective of this study was to examine specific factors that affect the selling price of feeder calves marketed through the Mississippi Feeder Calf Board Sale program, an alternative marketing strategy developed to offer producers an opportunity to increase prices received for their calves. A hedonic model was utilized to measure the effects of individual lot attributes on price. Results of sales conducted from 2008 to 2016 revealed a positive relationship between sale price and steer percentage, Brahman influence, the provision of information on growth implant practices, and number of loads per lot. Conversely, price was negatively associated with number …

Effects Of Dietary Plasticity And Landscape Heterogeneity On Brown Bears, Lindsey Stutzman

Theses and Dissertations

The brown bear (Ursus arctos) is a generalist omnivore that occupies diverse habitats and displays high levels of behavioral plasticity. Plasticity in foraging behavior can result in variable diets across a population, and allow individuals to use a greater variety of resources. The distribution of food in space and time may also be an important factor in determining brown bear resource selection as it can greatly influence foraging efficiency. Our objectives were to determine if seasonal brown bear home ranges were influenced by temporal availability and spatial distribution of resources and if deviation from an optimal diet influenced brown bear …

Death In The Gobi: A Case Study Of Skeletal Trauma From The Hets Mountain Cave In Mongolia, Christina Marie Ramazani

Theses and Dissertations

This study represents a contextualized analysis of the perimortem trauma and postmortem treatment of an assemblage (n=9) of naturally mummified individuals recovered from the Hets Mountain Cave in southern Mongolia. The assemblage dates AD 1434-1651, a period characterized by political instability and widespread conflict. Analysis of the trauma was completed utilizing radiological evaluation of 3D CT data. The perimortem trauma and postmortem treatment are contextualized within documentary and archaeological data on contemporary Mongolian mortuary and cultural practices to understand the social identities of these individuals. The trauma patterns are consistent with execution methods reserved for higher status Mongolians; the mortuary …

The Effect Of Formal Pedagogical Training Of Mathematics Faculty On Community College Student Success And Retention, Douglas Neal Donohue

Theses and Dissertations

This study examined the correlation between the proportion of full time mathematics faculty with formal pedagogical training at eight Mississippi public community colleges named to the Aspen Foundation list of the top 150 community colleges in the United States and the proportion of developmental math students who successfully completed a college algebra course in their 1st year, the proportion of students who graduated within 4 years, and the proportion of 1st-time full-time students who returned for the 2nd year. After collecting data from 6 of the 8 colleges, a correlational analysis revealed no statistically significant relationships between the proportion of …

The Food Factor: The Use Of Branding And Social Marketing, Mckayla A. Brubaker

Theses and Dissertations

Mississippi residents were surveyed to determine how The Food Factor and Extension brands were impacting their intent to change behavior. The Food Factor is a weekly Extension mass media program that communicates research-based information about food, nutrition, diet, and healthy lifestyles. The respondents were split into viewer and non-viewer categories. Viewers were asked about their perceptions of the show and their nutrition-related behaviors. Non-viewers were assigned to a branded or non-branded episode of The Food Factorto determine their perceptions and to see if branding was having an impact on their behavior. The study found that although The Food Factor was …

The Role Of Interaction With Faculty In Retaining Nontraditional Community College Students, Amanda Marie Hood

Theses and Dissertations

The purpose of this qualitative study was to examine the role of studentaculty interaction in retaining nontraditional community college students. There are a large and growing number of nontraditional students, especially at the community college level. Being labeled as nontraditional typically implies that there are multiple competitors for the time and resources of these students. Often, nontraditional students are less connected to their institutions, and exploring the relationships between faculty and student is a way to meet them where they are: in the classroom. As a result of the label nontraditional being difficult to define, the researcher used seven characteristics …

The Role Of Universal Stress Proteins In Edwardsiella Ictaluri Virulence, Ali Akgul

Theses and Dissertations

Edwardsiella ictaluri is an intracellular Gram-negative pathogen, causing enteric septicemia of catfish (ESC). Universal stress proteins (USP) are important in bacterial virulence, but the role of USPs in E. ictaluri virulence is not explored yet. Our aim was to analyze gene expression of 13 usp (usp01-usp13) and 7 USP-interacting genes (groEL, groES, dnaK, dnaJ, clpB, grpE, and ppGpp) under low pH, H2O2, catfish serum, and in vivo stress conditions, construct USP mutants, and determine mutants’ role in E. ictaluri virulence. We found that usp05, usp07 and usp13 genes were highly expressed under all stress conditions, while groEL, groES, dnaK, grpE, …

Safety Of Isopropyl Alcohol As A Carrier In Auxin Solutions For Application To Stem Cuttings, James Timothy Ray

Theses and Dissertations

In response to commercial propagators’ inquiries regarding potential phytotoxicity of alcohol used in root-promoting solutions for cutting propagation, three experiments were conducted using stem cuttings of seven herbaceous and woody plant taxa. Solutions were prepared with three rates of isopropyl alcohol (0%, 25%, or 50%) in combination with three rates of indole-3-butyric acid (IBA): 0, 1000, or 2000 ppm (Expt. 1); 0, 100, and 200 ppm (Expt. 2); or a mixture of IBA and 1-naphthalene acetic acid (NAA): 0+0, 500+250, or 1000+500 ppm IBA+NAA, respectively (Expt. 3) and applied to cuttings using the basal quick-dip method (Expts. 1 and 3) …

Pellagra Mortality In The Historic Mississippi State Asylum: A Comparison Of Skeletal Data And Institutional Records, Michelle L. Davenport

Theses and Dissertations

Pellagra, a nutritional disease with no known diagnostic skeletal indicators, affected patients in the Mississippi State Insane Asylum (MSA) between 1909 and 1936. The current study employed a sample of the MSA’s death-by-discharge records (N=3445) and a skeletal sample (N=19) from the MSA cemetery to test whether co-occurring alveolar bone loss and reduced bone remodeling in the skeletons can be associated with pellagra mortality in the records. Results of the study were inconclusive as to whether the co-occurring markers are associated with pellagra, but suggest that poor dietary conditions within the MSA, conditions prior to institutionalization, and age, sex, and …

Effects Of Non-Digestible Fiber Of Common Beans And Dietary Selenium On Gut Microbiota, Hsin-Yi Lu

Theses and Dissertations

Dietary composition can impact colonization and composition of gut microbiota. The first aim of this dissertation was to evaluate the effect of dietary Se deprivation, sex and, aging on taxonomic composition of gut microbiota in mice. We have previously shown that long-term dietary Se deprivation promotes health span deteriorate including type-2 diabetes like symptoms in later state Terc-/- mice carrying humanized telomeres. In the present study, the data suggested that the dietary Se deprivation and aging significantly and comparably altered the gut microflora composition. The ratio of Firmicutes/Bacteroidetes was decreased by dietary Se deprivation or aging in both sexes. Abundance …

Utilization Of Buffered Vinegar To Inhibit The Growth Of Listeria Monocytogenes On Marinated-Cooked Chicken Breast, James Leland Butler

Theses and Dissertations

The objective of this study was to evaluate the efficacy of buffered vinegar in a marinade solution on inhibiting Listeria monocytogenes growth on cooked broiler breast meat. Broiler breasts were vacuum-tumbled for 30 min in a marinade consisting of dry (0%, 0.4% DV, 0.6%DV, and 0.8%) or liquid vinegar (1.5%), sodium chloride, sodium tripolyphospate, and water. The chicken breasts were then cooked to an internal temperature of 75°C. The breast meat was inoculated with L. monocytogenes, placed into modified atmosphere packaging, and stored at 2°C plus/minus 2 for 0-60 days. L. monocytogenes growth was stable on treatments for up to …

Growth And Biofilm Formation By Listeria Monocytogenes And Salmonella Spp. In Cantaloupe Extracts On Four Food-Contact Surfaces At 22°C And 10°C, Piumi De Abrew Abeysundara

Theses and Dissertations

Center for Disease Control and Food and Drug Administration reports indicate that cantaloupe is one of the five most likely fruits and vegetables to cause a foodborne disease outbreak. Cantaloupe is a potential hazardous food based on the FDA food code since it is capable of supporting pathogen growth due to its low acidity and high moisture content. The objectives of this study were to determine the effect of strain and temperature on growth and biofilm formation of L. monocytogenes and Salmonella spp. in cantaloupe flesh and peel extracts on different food-contact processing surfaces. Growth of L. monocytogenes and Salmonella …

Human Resource Managers' Perceptions Of Soft Skills, Involuntary Employment Turnover, And The Efficacy Of A Proposed Career Pathway Model, Charles Michael Blankenship

Theses and Dissertations

The purpose of this study was to conduct qualitative interviews of 10 Human Resource Managers to determine their perceptions of the soft skills necessary for successful employment, to determine the primary causes of involuntary turnover, and to determine their perceptions of the proposed Smart Start Pathway to improve potential employee success and employment retention. 10 businesses located in a 9-county region in central Mississippi were purposively selected to participate in this study. 2 of the businesses were service sector employers, and 8 were manufacturers. Interviews were scheduled with the Human Resource Manager for each business, and the manager was supplied …

Examining Gendered Patterns Of Techniques Of Neutralization Using Fictional Crime Dramas, Lauren Michel Vasquez

Theses and Dissertations

The following dissertation uses fictional crime dramas to determine whether there are gendered patterns in the use of techniques of neutralization between and among male and female offenders. It utilizes a mixed method approach to answer three separate research questions: (1) how techniques of neutralization are used in fictional crime dramas, (2) whether such portrayals vary between and among male and female offenders, and (3) how elements of doing gender play a role in the gendered nature of males and female offenders’ techniques of neutralization. The sample included 124 episodes from four different fictional crime dramas and 383 individual offenses …

A Study Of A Turn Of The 20th Century Skeletal Collection From Memphis, Tn, Stephen Michael Davis

Theses and Dissertations

This thesis is a comparative and descriptive study of a turn of the 20th century human commingled skeletal collection from Memphis, TN. The Memphis Regional Forensic Center (MRFC) collection is over four hundred elements recovered in various states of fragmentation. This study focused primarily on the occurrence and prevalence of anatomical cutting and osteoarthritis of the MRFC collection in comparison to contemporary osteological samples to provide insight into a subset of people living in late 19th/early 20th century Memphis, TN. In the framework of biocultural theory, it was discovered that the MRFC collection likely represented individuals subjected to “structural violence” …

A Comprehensive Study Of Phenolics And Peptides From Three Legume Varieties, Yan Zhang

Theses and Dissertations

Lentil, black soybean and black turtle have been proved to be phenolic-rich legume varieties and possess higher antioxidant activity. In this study, the three legume varieties were subjected to broad range of processing conditions, and the effects on phenolic contents, antioxidant capacity and individual phenolic acid were investigated. The results showed all processing methods could decrease the total phenolic content, and steaming processing could preserve more phenolics and antioxidant activity than boiling processing. Phenolic acids mainly existed in nonree form and the content of individual free phenolic acids was dependent on the thermal process applied. When in vitro gastrointestinal simulation …

Perceptions Of Value Of Faculty Toward Doctoral Programs In Outdoor Adventure Education, Koby Garick

Theses and Dissertations

The researcher’s purpose for this dissertation was to determine how and why doctoral programs in outdoor adventure education (OAE) related fields (which included, leisure studies, park, recreation, tourism, and therapeutic recreation) operated, how the programs were financed, what the value of the programs were, and what makes the programs unique. The researcher conducted a detailed review of the literature. Then the researcher surveyed and interviewed doctoral program chairs in OAE related programs.

Fourteen schools were identified by the researcher as having OAE related doctoral programs. The researcher solicited survey responses from the doctoral program chairs of the schools’ and received …

Effects Of A Collegiate Employee Wellness Program On Participant Perceived Wellness And The Transtheoretical Model Of Change: Voices Of Participants, Amy Jeanette Rogers

Theses and Dissertations

With rising costs of healthcare, due to high counts of obesity and chronic diseases, employers are exploring ways to have healthier and more productive employees by implementing wellness programs. Previous studies conducted on wellness programs and physical activity interventions took place at worksites, in the general public or at four-year universities (Butler, Clark, Brulis, Castillo, & Racette, 2015; Haines, et al., 2007; Rongen, et al., 2014a). These intervention programs focused primarily on the physical dimension of wellness to the exclusion of the other dimensions. The purpose of this mixed methods wellness program study was to investigate the effects of an …

Insulin And Ketones: Their Roles In Brain Mitochondrial Function, Sheryl Teresa Carr

Theses and Dissertations

The prevalence of both Type 2 diabetes mellitus (T2DM) and Alzheimer's disease (AD) is increasing worldwide, and the trends are unfortunately expected to continue. AD has recently been tied with mitochondrial dysfunction and insulin resistance, creating a mechanistic tie between AD and T2DM. Unfortunately, insulin resistance is often increased with aging and therefore, all individuals are at risk of brain mitochondrial dysfunction. Without proper mitochondrial function, the brain will degenerate, causing impaired cognitive function and reduced quality of life. The purpose of this study is two-fold: first, to understand the role of ceramides in insulin-induced brain mitochondrial dysfunction, and; second, …

Multifunctionality Of Cover Crops On Organic Vegetable Farms In South Texas, Savannah M. Rugg

Theses and Dissertations

Situated in deep South Texas, the Lower Rio Grande Valley (LRGV) is considered one the most productive agricultural regions in the southern US. With the highest concentration of organic farms in the state (Hidalgo county), finding management practices that comply with organic certification is increasingly pertinent. Cover cropping can serve multiple functions in an agroecosystem such as: suppressing weeds, increasing soil organic matter (SOM), increasing soil nitrates, and enhancing soil biodiversity. The four cover crops (lablab, sunn hemp, sudangrass, and pearl millet) were assessed to see their potential to increase soil nitrogen, to increase soil organic matter, and to suppress …

A High Density Micro-Electrocorticography Device For A Rodent Model, Mukhesh Kumar Koripalli

Theses and Dissertations

Electrocorticography (ECoG) is a methodology for stable mapping of the brain surface using local field potentials (LFPs) with a wide cortical region, high signal fidelity, and minimal invasiveness to brain tissue. To compare surface ECoG signals with inter-cortical neuronal activity, we fabricated a flexible handcrafted ECoG electrode made with economically available materials. This research is on a Lewis rat implanted with a handcrafted 256-channel, non-penetrative ECoG electrode covering an area of 7mm x 7mm on the cortical surface. This device was placed on the motor and somatosensory cortex of the brain to record signals with an active animal. The recordings …

Neuromuscular And Arterial Compliance Responses To Different Resistance Training Frequencies And Protocols, Patrick Murphy

Theses and Dissertations

PURPOSE: The purpose of this study was to determine the impact of blood flow restriction and resistance training on arterial elasticity, EMG activity, and strength indices among sedentary to recreationally active females who completed 6 weeks of resistance training.

RESULTS: Significant time*condition interactions occurred in LE-1RM (p

CONCLUSION: The research group(s), 1–2 days/week with and without blood flow restriction, may increase training adaptations and responses parallel to the control group (3 days/week). There appears to be no differences in arterial compliance between groups.

Teacher Retention In Rural Schools Nested In Large Districts: An Ethnographic Qualitative Study, Sandra Gomez Cerda

Theses and Dissertations

The purpose of the study was to examine the retention of teachers that work in large school districts with rural schools. The study examined: 1) the general characteristics of large school districts that have small rural campuses that retain and recruit teachers; 2) what draws teachers to teach in rural schools in large school districts; and 3) what factors contribute to decisions to stay at rural schools in large school districts. The author offers recommendations to retain teachers in rural schools nested in large school districts.

Two Studies Of Partnership Approaches To Comprehensive School Physical Activity Programming: A Process Evaluation And A Case Study, Catherine A. Egan

Theses and Dissertations

This dissertation consists of two studies that examine partnership approaches to comprehensive school physical activity programs (CSPAP). Both studies function in tandem to advance the knowledge base about school – university partnership approaches to CSPAP programming. Study 1 examined the first-year classroom component of the Partnerships for Active Children in Elementary Schools (PACES) intervention, and Study 2 examined the implementation of a Health Optimizing Physical Education (HOPE)- based CSPAP. Both studies utilized school-university partnerships in their design and implementation.

The purpose of Study 1 was to examine the effects of different PACES treatment levels on classroom movement integration promotion during …

Handgrip Strength In Children With Cystic Fibrosis, Hannah Taylor Gibson

Theses and Dissertations

Background: Body mass index (BMI) is the primary accepted method to determine nutrition status in children with cystic fibrosis (CF); however, lean body mass (LBM) is more strongly associated with pulmonary function. Handgrip strength (HGS) measures muscle function and is reflective of LBM. The aims of this study were to assess if there was a relationship among HGS, nutrition status, and pulmonary function, to assess if HGS changed after hospitalization, and to assess if there was a relationship between HGS and nutrient intake. Methods: Twenty-three children with CF ages 6-18 years participated. BMI z-scores, nutrition risk scores, and …