Digital Commons Network^™

Detection, Activity Measurement And Phylogeny Of Ureolytic Bacteria Isolated From Elasmobranch Tissue, Yimu Yang

Master's Theses

Free-ranging marine elasmobranch tissue-associated micro-organisms were cultured from free-ranging Atlantic stingray (Dasyatis sabina) and Atlantic sharpnose sharks (Rhizoprionodon terraenovae). 16S rRNA gene phylogeny indicated bacteria community structure in both elasmobranchs were under phylum Proteobacteria, Firmicutes and Actinobacteria. By conducting split-plot ANOVA, we found the microbial richness is significantly different (P=0.0814) between two superorders of elasmobranch, which may largely due to their preferred habitats and feeding habits. Urease presentence and activity was detected in phylogenetically diverse bacterial strains. Species with high urea-hydrolyzing ability, such as Micrococcus luteus (shark blood isolate: 46.84 mU/mg protein; stingray blood isolate: 24.36 …

Impact Of Prolonged Sitting On Central Hemodynamics: Role Of Intermittent Pneumatic Compression Therapy, Anna Kayleigh Downey

Master's Theses

Prolonged sitting (3-6 hours) negatively impacts peripheral vascular health. Whether sitting similarly impacts central cardiovascular hemodynamics and vascular stiffness is unknown. Purpose: Determine if prolonged sitting increases central blood pressure, aortic pulse wave reflection and vascular stiffness. Methods: In 10 subjects (Age=22±2 yrs, BMI=28±4kg/m², 3 females), brachial artery pulse wave analysis was performed before (baseline-BL), during, and after 3 hours of sitting. Aortic pulse wave velocity (PWV) was examined before and after sitting using carotid applanation tonometry coupled with oscillometry performed on left upper-thigh. For mechanistic insight, intermittent pneumatic compression (IPC) was applied during sitting (i.e., 3, 120 …

A Meat Paradox: Media's Role In Mitigating The Omnivore's Dilemma, Karyn Camille Lewis

Master's Theses

The purpose of this research is to identify and understand media’s role in meat consumption and a disassociation of meat and its animal of origin. This study questions consumer behavior based on media portrayals of meat products as well as how consumers perceive these portrayals, meat consumption patterns based on media and family influence, and the types and levels of satisfaction (ex: self-esteem or masculinity) consumers receive from meat products.

A quantitative research approach was proposed for this study. The primary research method was a survey among students, faculty and staff at The University of Southern Mississippi. A total of …

Impact Of Prolonged Sitting On Cognitive Function: Implications For Cardio-Metabolic Risk, Sabina Miller

Master's Theses

Purpose: To determine if prolonged sitting negatively impacts cognitive function, cerebral perfusion, and central cardiovascular hemodynamics; and secondly, to test whether weight or physical activity status alters this response. Methods: Participants (N=20, age=26±7; BMI=30±7 kg/m²; 7 female) were taken through 3 hrs of sitting followed by a 10-min walk (treadmill). Cognitive function was assessed during sitting (10, 60, 120, and 180 mins) and following the walk using a color/word Stroop test. Cerebral perfusion was measured via near infrared spectroscopy (total hemoglobin—tHb). Central cardiovascular hemodynamics and aortic stiffness (pulse wave velocity—PWV) were measured using the SphygmoCor XCEL device before, …

The Role Of Emotion Regulation In The Relationship Between Trait Anger And Relational Aggression, Skylar Hicks

Master's Theses

Relational aggression (RA) has been linked to a number of serious problems for all age ranges, especially in young children, adolescents, and emerging adults. Elevated trait anger appears to be positively related to both peer and romantic RA, and there is some evidence that difficulties with emotion regulation are positively associated with RA as well. The present study investigated the role of emotion regulation as a potential moderator of the relationship between trait anger and RA in a college student sample (N = 307) while taking general negative affect into account. As expected, trait anger was a positive predictor …

The Moderating Role Of Pbs In The Relationship Between Positive Expectancies And Alcohol-Related Negative Consequences, Kray Scully

Master's Theses

Hazardous drinking college students have become an increasingly focused upon group within alcohol research, especially considering the extent of negative consequences they experience. Recently, increased positive expectancies has been identified as an influential contributor to increased hazardous drinking and alcohol-related negative consequences. However, more comprehensive evaluation of the domains of positive expectancies (e.g., sociability, tension reduction, sexual enhancement, liquid courage) is warranted to ascertain which types are more salient in predicting hazardous drinking and alcohol-related negative consequences. Further, research has yet to explore how protective behavioral strategies (PBS) affect the strength of the associations between specific positive expectancies and alcohol-related …

"There Was Something Grotesque": The Application And Limits Of Respectability In The Daughters Of Bilitis, Elizabeth Diane Greer

Master's Theses

Living in both the “deviant” and “normal” worlds, the leadership of The Daughters of Bilitis generally adhered to a respectable and assimilationist public persona as evidenced through political activities and the publication of their periodical The Ladder. Due to this juxtaposition, the largely middle-class, white membership exhibited socially conservative views in order to make long-term social change, leading to an inherent contradiction between maintaining their middle-class identity and public respectability. Seen from the organization’s founding in 1955 until its collapse in 1970, these contradictions and the focus on respectability politics adds to the existing scholarship on the DOB.

The …

Linkages Between Marsh Fragmentation, Prey Availability, And Blue Crab (Callinectes Sapidus) Abundance And Mortality, Lennah Shakeri

Master's Theses

Coastal marshes are important nursery habitats for many commercially important invertebrate species, yet these marshes are being lost worldwide at an unprecedented rate due to subsidence, erosion, climate change, and human activity. As marsh is lost, it creates the opportunity for submerged aquatic vegetation (SAV) colonization and establishment in newly created open water areas. Blue crabs, Callinectes sapidus, use both marsh edge and SAV habitat during the juvenile stages and support one of the largest fisheries in the Gulf of Mexico, worth over $70 million in 2015. This thesis studied the linkages between habitat type, SAV cover, benthic prey …

Get To The “Point”: Improving Location Services In Tippah County Mississippi, Haley Feather

Master's Theses

Point location using geographic information systems (GIS) technology has become integrated into everyday society and daily decision-making by utilizing addresses to provide goods and services. A need exists at a national, state, and local level for an address database. The objectives of this study were to [1] determine the most suitable address data model to be used in Mississippi, [2] determine how positional accuracy changes between urban and rural areas, and [3] determine spatial variations in aerial imagery. Address data model comparisons were conducted using match rates between street, parcel, and point address models. Positional accuracy was determined for urban …

Natural Disasters And Attachment Quality: The Mediating Role Of Coping, Alexandra Teller

Master's Theses

Research shows a strong relationship between children’s exposure to a natural disaster, parental distress, and development of mental health problems. It is theorized that trauma-related parental distress is associated with maladaptive parenting behaviors, which negatively impact the psychological development of children. The long-term impact of trauma exposure from a natural disaster on parent-child relationship quality and mental health outcomes for emerging adults has only been minimally investigated. The use of adaptive coping strategies has been found to be helpful for preventing mental health problems, while maladaptive coping has been associated with the development of psychopathology. The present study examined the …

Regional Variation In Migratory Behavior And Reproductive Output Of The Gulf Of Mexico Blue Crab Spawning Stock, Adam Kemberling

Master's Theses

The overarching goal of this research was to better understand the structure and boundaries of the blue crab stock(s) in the Gulf of Mexico, focusing on large-scale movements of spawning female crabs. Because spawning location is a primary determinant of larval transport pathways, understanding spawning locations and offshore movements of female blue crabs can inform stock identification and potentially clarify the somewhat conflicting population genetic information available for blue crabs. A large-scale mark-recapture study was conducted through the partnership of state/federal management agencies, the commercial fishing industry, recreational fisherman, tourists, and numerous academic institutions to shed light on the timing …

Behavioral Skills Training To Teach Correct Heading Skills To Youth Soccer Players, Laura Quintero

Master's Theses

Recently, concerns regarding sport-related concussions have increased within the research literature, the media, and popular culture. It is unknown to what degree purposefully striking the ball with one’s head (i.e. heading) contributes to concussions within youth soccer. There is currently limited research on an effective teaching method to improve heading technique. Due to the numerous applications of Behavioral Skills Training (BST) to teach a wide variety of behaviors, the purpose of the current study was to evaluate the effectiveness of BST to teach correct heading techniques to youth soccer players. A task analysis was produced to score each header. Results …

Knee Angles And Axes Crosstalk Correction In Gait, Cycling, And Elliptical Training Exercises, Jordan M. Skaro

Master's Theses

When conducting motion analysis using 3-dimensional motion capture technology, errors in marker placement on the knee results in a widely observed phenomenon known as “crosstalk” [1-18] in calculated knee joint angles (i.e., flexion-extension (FE), adduction-abduction (AA), internal-external rotation (IE)). Principal Component Analysis (PCA) has recently been proposed as a post hoc method to reduce crosstalk errors and operates by minimizing the correlation between the knee angles [1, 2]. However, recent studies that have used PCA have neither considered exercises, such as cycling (C) and elliptical training (E), other than gait (G) nor estimated the corrected knee axes following PCA correction. …

From Dago To White: The Story Of Sicilian Ethnic Evolution In New Orleans Amidst The Yellow Fever Epidemic Of 1905, H. Denise Lopresto Saucier

Master's Theses

The story of the Sicilian immigrants’ experiences in Louisiana is a tale of racial and ethnic evolution in the face of physical threats. With the end of the Civil War, many emancipated slaves migrated to other parts of the country, which left Louisiana planters in need of laborers. Planters turned to European labor to fill that need, bringing thousands of Sicilian peasants to work on their plantations. Extreme poverty and oppression made the opportunity to emigrate highly attractive, but Sicilians found problems in Louisiana as well. In addition to low wages, crowded living conditions, discrimination, and violence, the immigrants faced …

Powder Bed Surface Quality And Particle Size Distribution For Metal Additive Manufacturing And Comparison With Discrete Element Model, Irene Yee

Master's Theses

Metal additive manufacturing (AM) can produce complex parts that were once considered impossible or too costly to fabricate using conventional machining techniques, making AM machines an exceptional tool for rapid prototyping, one-off parts, and labor-intensive geometries. Due to the growing popularity of this technology, especially in the defense and medical industries, more researchers are looking into the physics and mechanics behind the AM process. Many factors and parameters contribute to the overall quality of a part, one of them being the powder bed itself. So far, little investigation has been dedicated to the behavior of the powder in the powder …

Enhancements To The Microbial Source Tracking Process Through The Utilization Of Clustering And K-Nearest Clusters Algorithm, Tram B. Lai

Master's Theses

Bacterial contamination in water sources is a serious health risk and the sources of the bacterial strains must be identified to keep people safe. This project is the result of a collaboration effort at Cal Poly to develop a new library-dependent Microbial Source Tracking method for determining sources of fecal contamination in the environment. The library used in this study is called Cal Poly Library of Pyroprints (CPLOP). The process of building CPLOP requires students to collect fecal samples from a multitude of sources in the San Luis Obispo area. A novel method developed by the biologists at Cal Poly …

But I Need My Money Now: A Stratified Propensity Score Analysis Of The Effects Of Retirement Decisions Made During The Great Recession On Income Mobility, Zachary Kline

Master's Theses

The Great Recession and accompanying financial crisis that occurred between 2007 and 2009 presented a host of emergency expenses to Americans with historically low traditional savings while at the same time limiting their access to credit. The resulting increase in poverty and decrease in real median family income raises the question: What if more Americans had access to liquid, emergency funds? The United States’ retirement system increasingly relies on choice-based public policy programs that allow individuals to access their retirement funds by “cashing out” during financial hardship. Proponents of choice programs may expect individuals who cash out of their retirement …

Nanoscale Mapping Of In-Situ Micro Electro Mechanical Systems With Atomic Force Microscopy, Manuel Rivas

Master's Theses

Micro-electro-mechanical-systems (MEMS) are increasingly at our fingertips. To understand and thereby improve their performance, especially given their ever-decreasing sizes, it is crucial to measure their functionality in-situ. Atomic Force Microscopy (AFM) is well suited for such studies, allowing nanoscale lateral and vertical resolution of static displacements, as well as mapping of the dynamic response of these physically actuating microsystems. In this work, the vibration of a tuning fork based viscosity sensor is mapped and compared to model experiments in air, liquid, and a curing collagen gel. The switching response of a MEMS switch with nanosecond time-scale activation is also monitored …

Assessment Of Maternal And Infant Outcomes Of Moderately Malnourished Pregnant Adolescents In Malawi, Alyssa Marie Friebert

Master's Theses

Background: Adolescent childbearing and maternal malnutrition are common in low- and middle-income countries and are associated with increased risk for poor maternal and infant outcomes. Adolescent pregnancy compounded with moderate malnutrition exacerbates outcomes common to both individually. Supplementary foods may be a way to improve outcomes in malnourished adolescent pregnant women.

Objective: To retrospectively assess maternal and infant outcomes in moderately malnourished pregnant young adolescents (16-17 YO), older adolescents (18-19 YO), and adults (≥20 YO) in response to one of three nutritional interventions and in a pooled treatment group analysis, and to assess differences in infant outcomes by infant gender. …

Implementing Modified Aha Criteria In The Measurement Of Blood Pressure In Uconn’S Migrant Farmworker Clinics, Alexandra Turgeon

Master's Theses

No abstract provided.

The Politics Behind The National School Lunch Program, Jaylyn Brown

Master's Theses

The National School Lunch Program (NSLP) is one of the longest federally funded programs in the United States. The program is meant to provide food that is nutritious and affordable to schoolchildren. Indeed, most students receive free or a reduced price lunch highlighting the importance of affordability and nutrition in the school lunch system. Since the creation of the NSLP in 1946 debates about food quality and nutrition standards have consumed school lunch reform discussions. Many health organizations stress the importance of child nutrition, and advocate for the means to prevent diseases such as childhood obesity, diabetes, and heart disease. …

Chronic Circadian Misalignment Leads To Reduced Longevity And Largescale Changes In Gene Expression In Drosophila Melanogaster, Alex Christ Boomgarden

Master's Theses

As a result of earth's orientation toward the sun producing day and night, organisms have evolved an endogenous circadian timing system that is responsible for the 24-hour oscillation of most physiological and behavioral processes. This timing system is constantly synchronized to the external environment to adapt to and anticipate changes in light, temperature, food, and mate availability. In modern society, social and work constraints cause people to live schedules that are out of sync with their internal circadian clocks, producing a chronic circadian misalignment (CCM). While epidemiological studies in humans point to potentially damaging metabolic and cognitive consequences of CCM, …

Machine Learning Methods For Kidney Disease Screening, Rathna Ramesh

Master's Theses

The number of people diagnosed with advanced stages of kidney disease has been rising every year. Early detection and constant monitoring are the only way to prevent severe kidney damage or kidney failure. Current test procedures require expensive consumables or several visits to the doctor, which results in many people foregoing regular testing. To address this problem, we propose a cost-effective teststrip-based testing system that can facilitate kidney health checks from the comfort of one’s home by using mobile phones. The specially designed teststrip facilitates a colorimetric reaction between alkaline picric acid and creatinine in a blood sample that has …

Pain And Academic Performance In Youth With Spina Bifida: The Mediating Role Of Neuropsychological Functioning, Diana Margaret Ohanian

Master's Theses

Objective: The current literature has identified few modifiable condition parameters associated with academic performance in youth with spina bifida (SB). Nevertheless, youth with SB are more likely to struggle academically than their typically developing (TD) peers. Therefore, identifying areas for clinical intervention is paramount. Pain, an understudied secondary condition in youth with SB, has been found to be associated with poorer academic performance in TD youth. Further, neuropsychological functioning has been found to be both negatively associated with pain and positively associated with academic outcomes. The aims of this study were to examine (1) the relationship between pain and academic …

Consistency Of Health Behaviors And Relations To Bmi In First Year College Students, Laura Nicholson

Master's Theses

Existing research suggests that individuals with erratic schedules (e.g., shift workers) may be at greater risk for weight gain. This may be due, in part, to the inconsistent timing of health behaviors, such as sleep. Little is known, however about the relevance of the consistent timing of health behaviors among other populations, including college students who are risk for weight gain. The current study examined the consistency of three health behaviors (i.e. sleep, eating occurrences, and physical activity) and relations with body weight among first year college students at a large Midwestern university. Daily diary methods were used to collect …

Reflections On Life: Replication And Extension, Karen Osowski

Master's Theses

This study used an experimental methodology to examine positive affect and gratitude as mediators of the beneficial impact of an intervention in which older adults savor "life lessons" they have learned in growing older on measures of psychological well-being (i.e., positive attitudes toward aging, life satisfaction, anxiety, state self-esteem, and state hope). In the following pages, I first review the background literature on gerontology and quality of life as well as describe, in detail, the original experiment (Smith & Bryant, 2018) that formed the foundation of the proposed research. Next, I describe several extensions of this earlier study that are …

It's About Time: Length Of Incarceration, Gang Membership, And Recidivism Among Illinois Prison Releasees, Henry Douglas Otto

Master's Theses

This study explored the effect of time spent incarcerated on recidivism among a sample of individuals released from IDOC facilities from 2011 to 2014 (N = 72,716). Gang members were compared to non-gang members in order to evaluate the potentially heterogeneous nature of the effect of length of stay on recidivism within the competing frameworks of deterrence theory and social learning theory. The samples were further split into separate analyses based on the current felony class, and length of stay was operationalized as incarceration in months and split into quartiles based on the distribution of each felony class sample. The …

The Educated Hustlers And Divas: How Black Youth Use Black Television As A Tool To Communicate While In School., Kiersten M. Smith

Master's Theses

The purpose of this study is to determine how Black youth use television as a tool to communicate in their social interactions with their peers. The research question for this project is; In what ways do Black youth use Black television as a tool in school social settings? This study took a qualitative approach that called for the method of focus groups. Black students between the ages of 10-20 gathered into four focus groups to discuss how they use Black content to communicate with their peers. The results of the research show that Black youth use Black television as a …

Voices From The Margins: Service Providers Perspectives On Empowering Refugee Women, Deidra Ann Coleman

Master's Theses

Refugee women face considerable challenges while fleeing their countries, and attempting to adjust to their new lives in their host country. As a result of being both a woman, and a member of a marginalized group, refugee women tend to suffer disproportionately during displacement and and resettlement (UNHCR, 2015). They are more likely to be discriminated due their gender and ethnicity, and to lack the necessary community supports and resources needed to overcome barriers they encounter. In response to the refugee crisis, service organizations have emphasized empowerment as a key way to improve the lives of refugee women. While there …

Examining Recidivism And Correlates Of Yasi Scores Among Youth Released From Idjj, Claire Fischer

Master's Theses

There are two main purposes of this research: 1) to provide the Illinois Department of Juvenile Justice (IDJJ) with an updated picture of recidivism and 2) to determine how YASI risk/needs/protective domains and risk scores relate to post-release recidivism. To date, the research that is available regarding youth recidivism is fraught with methodological concerns (i.e., inconsistency in measurement). Moreover, there have been no systematic analyses of the YASI in Illinois since its implementation within the IDJJ. Thus, the present research will attempt to fill in the gaps by assessing rates of juvenile recidivism, the degree to which needs identified by …