Digital Commons Network^™

Epigenetic Remodeling As A Mediator Of Environmental Toxicant Exposure In The Brain, Christopher David Walden

Theses and Dissertations

Natural toxins and artificial toxicants are abundant throughout our environment and may play an integral role in remodeling our epigenome and in the development of neural diseases. Exposure to heavy metals and organic pollutants, such as DDT and its derivatives, have been linked to neural disease. Additionally, there are links between direct exposure, in both adults and children, to short-lived pesticides and neural diseases. While the link has been established, understanding the root cause has yet to be elucidated. One increasingly relevant field offering promise in achieving this goal is epigenetics. Epigenetic remodeling is one potential mechanism by which environmental …

Study Skills Self Monitoring For Adolescents With Adhd, Rachel Michelle Lesse

Theses and Dissertations

The purpose of this study was to see how self-monitoring affected academic progress among high school aged students with ADHD. Students were monitored throughout their study skills class period, where they learned to monitor themselves by assessing a variety of factors, such as personal grades, missing assignments, and personal reflection. Of the three students monitored, two increased grades in most of their academic subjects, and all increased their homework production post intervention. The study did not go without various limitations, however future implications are discussed as to the importance of this study.

Analysis Of Small Muscle Movement Effects On Eeg Signals, Erhan E. Yanteri

Theses and Dissertations

In this thesis, the artefactual effects of the small muscle movements were investigated. Upper frequency bands (30 Hz) of the EEG signal were extracted in order to investigate the artefactual effects of the small muscle movements. When the contamination level is high, the detection of the small muscle artifact can be made with the 92.2% accuracy. If these artifacts are really small such as a single finger movement, the detection accuracy decreases to 64%. But, the detection accuracy increases to 72% after removing the eye blink artifacts. The results of the classification support our hypothesis about the artefactual effects of …

Reflection Matrix Method For Controlling Light After Reflection From A Diffuse Scattering Surface, Kenneth W. Burgi

Theses and Dissertations

This research focuses on reflective inverse diffusion, which was a proof-of-concept experiment that used phase modulation to shape the wavefront of a laser causing it to refocus after reflection from a rough surface. By refocusing the light, reflective inverse diffusion has the potential to eliminate the complex radiometric model of indirect photography by creating a virtual light source at the first diffuse reflector that satisfies the line-of-sight requirement of dual photography. However, the initial reflective inverse diffusion experiments provided no mathematical background and were conducted under the premise that the process operated similarly to transmissive inverse diffusion.

In this research, …

An Information Theoretic Investigation Of Complex Adaptive Supply Networks With Organizational Topologies, Joshua V. Rodewald

Theses and Dissertations

Supply networks exist throughout society in manufacturing and knowledge-intensive industries as well as many service industries. Organizations have been noted to behave as complex adaptive systems or information supply networks with both formal and informal structures. Thoroughly understanding supply network structure and behavior are critical to managing such organizations effectively, but their properties of complex adaptive systems make them more difficult to analyze and assess, forcing researchers to rely on unrealistic data or assumptions of behavior. This research proposes an information theoretic methodology to discover such complex network structures and dynamics while overcoming the difficulties historically associated with their study. …

Fresh Air: The Impact Of Reformulated Gasoline On Infant Health, Mohammed Husain

Theses and Dissertations

This paper considers a 1996 Reformulated Gasoline program, where gasoline emissions were regulated in California, to observe the effects on infant health indicators. I use a cross-county analysis to find significant effects from the policy that suggests an improvement in birth weight, gestational length, and infant mortality.

Predictors Of Substance Use, Relationship Arrangements And Intimacy Expectancies Among Gay Couples And Associations To Erikson Intimacy Development, Jonathan Lopez Matos

Theses and Dissertations

This study explored relationship arrangements, intimacy expectancies of substance use and the potential role of Eriksonian intimacy development on drug use among gay and bisexual men. Data were collected from 339 partnered gay/bisexual men across the United States. Measures addressed arrangement type, intimacy expectancies, Eriksonian intimacy and drug use.

The Effect Of Economic Integration And Political Centralization On Linguistic Diversity - And The New Function And Status Of The English Language In Europe, Demba K. Baldeh

Theses and Dissertations

This paper examines the effect of economic integration (EI) and political unity on

linguistic diversity and the new function and status of the English language in

Europe. It shows the current sociolinguistic transformation and the growing use of

English both as strong effects and key indicators of the process.

E-Waste In Relation To Geopolitical Forces: A Case Study Of The United States - Mexico Border Region, Michael A. Hicks

Theses and Dissertations

Analysis deconstructs the electronic waste industry and its interconnectedness to geopolitical forces and economic development in the border region between San Diego, California and Tijuana, Mexico. A symbiotic business relationship exists between informal e-waste collectors, non-profit collection sites, and for-profit recyclers. Fieldwork data is analyzed from a slow/structural violence perspective.

Investigating Attachment Behavior In Shelter Dogs, Anamarie Johnson

Theses and Dissertations

This study utilized a modified Strange Situation Test to investigate attachment behavior of shelter dogs to an experimental owner and a stranger observing physical contact and location. No difference was seen in physical contact but a small difference was seen in location.

Protein Kinase M Zeta-Mediated Ltp Maintenance In The Non-Human Primate Hippocampus: A Role For Stress And Serotonergic Signaling In Affective Processing, Sasha L. Fulton

Theses and Dissertations

Early-Life Stress (ELS) is associated with vulnerability to mood disorder, but it’s not well understood how ELS contributes to deficits in cognitive function. Atypical PKMzeta is critical for LTP maintenance and memory. The current study aims to characterize the ELS phenotype with respect to this key marker of hippocampal LTP.

Interface: Fringe Landscapes And Identity, Elizabeth T. Lewin

Theses and Dissertations

An MFA thesis that weaves together: virtual landscapes, escapism, Theresa Hak Kyung Cha, utopia, family, and identity.

Individual Thought Patterns: Women In New York's Extreme Metal Music Scene, Joan M. Jocson-Singh

Theses and Dissertations

Extreme metal music (EMM) is both an umbrella term and a sub-category of heavy metal. Although women have a small but steady presence in heavy metal, this number shrinks when applied to the EMM scene. Using ethnographic research, participant-observation and interviews, this study surveys women in New York's EMM scene to address participation, gender performativity and feminist musicology.

Private Conversation, Gahee Park

Theses and Dissertations

My thesis paper "Private Conversation" discusses the themes, contexts, and influences relevant to paintings and drawings I made during my MFA studies.

Roots And Repercussions Of Romantic Feeling: Sensation And Affect In The Poetry Of Samuel Taylor Coleridge And William Wordsworth, Mary K. Cotter

Theses and Dissertations

Enlightenment emphasis on rationalism in philosophy and the arts prefigures Samuel Taylor Coleridge’s and William Wordsworth’s Romantic recovery of a subject’s empirical relationship to nature and the phenomenal world. Coleridge and Wordsworth respond to philosophical precedents that emphasize rationalism and the autonomy of a subject while introducing empiricism and sensation as primary components of the speaker’s experience. The poets delineate a fluid shift from the Enlightenment to Romanticism through an interchangeable reliance on Kantian and Burkean philosophical methods. The philosophy of Immanuel Kant follows the Cartesian cogito toward a similar end of reducing human experience to circumstance bereft of empirical …

Black Minds Matter: The Academic Identity Of First Year African American Stem Students, Christa Dawn Platt

Theses and Dissertations

A national push exists to increase the number of African American students who pursue STEM majors (Baber, 2014). While African American students have high aspirations to pursue STEM disciplines, an incongruence remains between their aspirations and their attainment of STEM degrees (Archer, Dewitt, Osbourne, 2015). This work seeks to critically underscore the structural issues that impede African American students in their journey as STEM majors. These impediments have been explored as factors that influence the identity of African American students. In the spirit of Critical Race Theory, the goal of this study is to give voice to first year African …

Antigenic And Genetic Evolution Of Emerging Avian Origin Influenza A Viruses, Yifei Xu

Theses and Dissertations

Periodic introductions of influenza A viruses (IAVs) from wild birds contribute to emergence of novel strains that infect domestic poultry, lower mammals, and humans, but the mechanisms of emergence are unclear. The objectives of this dissertation research are to infer the genesis of two emerging IAVs, low pathogenic avian influenza (LPAI) H10N8 and highly pathogenic avian influenza (HPAI) H7N8 viruses, and to characterize the antigenic diversity and genetic evolution of contemporary H7 avian influenza viruses (AIVs) from North America. First, AIVs that are genetically close to the human H10N8 isolate were recovered at the live poultry market (LPM) visited by …

Characterization Of Microparticles Through Digital Holography, Nava Raj Subedi

Theses and Dissertations

In this work, digital holography (DH) is extensively utilized to characterize microparticles. Here, “characterization” refers to the determination of a particle’s shape, size, and, in some cases, its surface structure. A variety of microparticles, such as environmental dust, pollen, volcanic ash, clay, and biological samples, are thoroughly analyzed. In this technique, the microscopically fine interference pattern generated by the coherent superposition of an object and a reference wave fields is digitally recorded using an optoelectronic sensor, in the form of a hologram, and the desired particle property is then computationally extracted by performing a numerical reconstruction to form an image …

Network Interdiction Models And Algorithms For Information Security, Apurba Kumer Nandi

Theses and Dissertations

Major cyber attacks against the cyber networks of organizations has become a common phenomenon nowadays. Cyber attacks are carried out both through the spread of malware and also through multi-stage attacks known as hacking. A cyber network can be represented directly as a simple directed or undirected network (graph) of nodes and arcs. It can also be represented by a transformed network such as the attack graph which uses information about network topology, attacker profile, and existing vulnerabilities to represent all the potential attack paths from readily accesible vulnerabilities to valuable target nodes. Then, interdicting or hardening a subset of …

Investigating The Antigen Removal Process Of Porcine Cartilage In Preparation Of Creating An Osteochondral Xenograft, Bradley Jeffery Kindred

Theses and Dissertations

With Athletes and individuals developing osteoarthritis and chondral defects at younger ages, long term treatments are in high demand. Total knee replacements only last for 10-15 years, so younger individuals would need to have multiple knee replacements within their lifetime. Allograft transplantation has shown to last long term and have high success rates, but the lack of donors and the possibility of damaging other areas of the knee to obtain tissue grafts has become a large concern. Xenografts derived from porcine cartilage is cost effective and the supply is abundant. Two antigen removal processes were examined: a short term antigen …

Natural Population Dynamics Of Rock Iguanas In The Bahama Archipelago, Giuliano Colosimo

Theses and Dissertations

Understanding whether groups of individuals represent a single panmictic gene pool, or multiple genetically structured populations across a species range should aid in predicting whether specific conservation strategies would be more or less effective for species preservation. Further, contrasting the population structures of multiple coexisting taxa could foster an even deeper understanding of evolutionary divergence among demes and potentially even suggest local adaptation in the form of tight coevolutionary relationships. Finally, the analysis of population dynamics within small and isolated populations could improve our understanding of the relative importance that different evolutionary mechanisms have in predicting population persistence in the …

Stabilized Urea Fertilizer Effects On Corn Nitrogen Use Efficiency And Soil Nitrogen Transformations, Michael Paul Nattrass

Theses and Dissertations

Urea based fertilizers are susceptible to N losses through volatilization, denitrification, and leaching. A field and incubation experiment were conducted at Mississippi State between 2013 and 2015 to evaluate the effect of fertilizer stabilizers on grain yield, N use, and N transformations in various soil textures. Stabilizers were applied to liquid urea-ammonium-nitrate (UAN) solution (32%) and granular urea (46-0-0) at labeled rates for 179 and 112 kg N ha-1 for the field and incubation experiments, respectively. Grain yield and N content at tasseling and physiological maturity were measured for the field experiment. Extracts from the incubation experiment were measured for …

Synthesis And Reactions Of Novel Donor-Acceptor Cyclopropanes, Radhika Reddy Nareddy

Theses and Dissertations

Natural products serve as a major resource for many pharmacologically-active drugs found in the market today. Using natural products as medicines, however, is associated with many limitations such as availability and isolation. An alternative to this is the synthesis of these compounds, which can be done using two different approaches: (1) Total synthesis of the molecule, and (2) A semi-synthetic approach. Total synthesis generally involves synthesis of the target molecule by assembling the ring systems or the core skeletal framework of the natural product. There are numerous methods reported in the literature for the synthesis of these ring systems. Despite …

A Study Of Wheat Flour Tortillas, Combustion, Selected Gaseous And Nuclear Surrogate Samples Using Laser-Induced Breakdown Spectroscopy (Libs), Charles Tarshi Ghany

Theses and Dissertations

Laser-induced breakdown spectroscopy (LIBS) is an efficient tool for identification of elemental composition and characterization of materials. The concept of this technique is to focus a laser pulse of sufficiently high power on to a sample to create a plasma plume of atoms, ions, and molecules. The measurement of the resulting optical emission from these species provides the basis of the spectral analysis. Spectroscopic analysis of the plasma generated by Nd:YAG laser irradiation of wheat flour tortillas was carried out. A careful selection of spectral lines of Ca, Na and K which do not suffer from spectral interference was made. …

America Reads-Mississippi/Americorps Reading Program's Impact On Mississippi Community College Attendance, Charity Yarbrough

Theses and Dissertations

Since the inception of AmeriCorps programs, reading, education and civic engagement has been emphasized in a large portion of the United States. Members enlist to serve schools and communities for 1 year, possibly 2. Upon completion of a member’s year(s) of service an education award is given which can be used to attend a community college, university or repay student loans. This study showed how AmeriCorps/America Reads programs partnered with community colleges and universities which recruited members to volunteer at school sites and community centers tutoring students in classrooms to improve reading, grades, engage in community service activities, use education …

American White Pelicans Hand Raised Until Fledging And Examination Of The Trematode Infection Bolbophorus Damnificus In These Birds, Treena Lee Ferguson

Theses and Dissertations

Because little is known about juvenile American White Pelicans (Pelecanus erythrorhynchos) this study was conducted to gather more information on disease, general ecology and growth of American White Pelicans from hatching to fledging. In July 2011, American White Pelican regurgitate samples from North and South Dakota sub-colonies were collected/analyzed in preparation for a captive trial. Nutrient content compared between the colonies was found to be significantly different. Concentrations of Immunoglobulin Y and A in regurgitate samples were significantly different between colonies. A captive trial began 29 May 2012 and ended 30 July 2012, in which 16 American White Pelicans were …

Application Timing Of Herbicides For Miscanthus (Miscanthus X Giganteus) Control And Effects Of Mowing On Rhizome Initiation And Production, Dosha Nicole Barksdale

Theses and Dissertations

Herbicide treatments were tested on mature stands of Miscanthus in 2013 and 2014 in Winston and Oktibbeha counties Mississippi. Twenty-one different herbicide treatments and two application timings, summer and fall, were evaluated. Glyphosate at 4,500 g ae ha-1 applied in the summer provided the best Miscanthus control at each location. Control with fall applications of glyphosate varied between locations. Two greenhouse studies were conducted in 2014 and 2015 at Mississippi State, MS to evaluate the effects of mowing on seedling Miscanthus, as well as the time period between seed germination and rhizome initiation. Rhizomes were visible on seedling plants 15 …

Understanding The Exotic Distributions Of Invasive Species, Tyler Evan Schartel

Theses and Dissertations

Invasive species are organisms whose introduction and spread in exotic ranges result in a multitude of ecological impacts. Understanding the factors that constrain the exotic distributions of invasive species is of considerable interest. Biotic associations formed with taxa in the invaded community may be particularly important in shaping invader distributions. These associations emerge from interactions between the traits of the invasive species and some subset of the traits present in the invaded community. Focusing on how organism traits influence the outcomes of biotic interactions may inform predictions of invader distributions. This kind of trait-based approach may be most easily applied …

Temporal Growth And Harvest Adjustment Procedures For Large-Scale Forest Inventory Data, Jacob R. Beard

Theses and Dissertations

The Mississippi Institute for Forest Inventory (MIFI) multi-product forest inventory divides Mississippi into five inventory regions with one region inventoried each year on a rotating basis. Resource analyses that overlap these temporally separated regions require adjustment to a common comparative time base by applying appropriate forest stand growth and harvest allocation models to the portions of a selected area not inventoried at the desired common time base. Currently the Mississippi Dynamic Inventory Reporter (MDIR) does not make adjustments to temporally synchronize portions of user selected working circles, polygons, or counties that occur in separate inventory regions. Separate inventory reports for …

The Influence Of A Graphing Calculator Program Policy Change On The Algebra I High Stakes Assessment In Mississippi, Elizabeth Anderson Repsher

Theses and Dissertations

Graphing calculator programs have been used on high-stakes tests and teacher-created assessments at the secondary and college level for many years. These programs- are even used on college-placement tests such as the ACT. Beginning with the 2011-2012 school year, the Mississippi Department of Education (MDE) made the decision to no longer allow the use of graphing calculator applications and/or programs on the Subject Area Testing Program (SATP2) for Algebra I. Currently, limited research exists to address the influence of graphing calculator program use on high-stakes assessments. The programming capabilities of graphing calculators should not be ignored. Because of the 2011-2012 …