Digital Commons Network^™

Methane Dynamics In St. Louis Bay, Mississippi, Hannah Marie Roberts

Master's Theses

A method of dissolved methane analysis was developed utilizing cavity ring-down spectroscopy and headspace equilibration. Samples of 70 mL were collected in 140 mL plastic syringes and equilibrated with a methane free headspace. Reproducibility was high (i.e. 4% typical RSD), and samples were successfully measured in the low nanomolar to high micromolar range. During method development, multiple research cruises were undertaken in the northern Gulf of Mexico. Stations included the Orca Basin, the Deepwater Horizon site, and the surrounding area. The Deepwater Horizon site showed no continuing leakage from October 2010 to June 2013. Samples collected from the northern Gulf …

The Ontogeny Of Whistle Production In Infant Atlantic Bottlenose Dolphins (Tursiops Truncatus) During The First Thirty Days Of Life, Brittany Leigh Jones

Master's Theses

The manner in which dolphin calves acquire their whistle repertoire is largely unknown. This paper focuses on whistle development in four bottlenose dolphin calves during the first thirty days of life in order to increase our understanding of the early emergence of whistles and whistle-like vocalizations. The acoustic parameters of whistle-type vocalizations (i.e., whistles and whistlesquawks) that coincided with a bubblestream emission from the focal calf and/or its mother were analyzed, as were the behavioral states of the mother-calf pair during the emission of such vocals. Mother and calf whistle rates are inversely related, with the mother whistling more often …

Assemblage Comparisons Of Living Benthic Foraminifera At Bathyal Sites Oiled And Un-Oiled By The Deepwater Horizon Blowout In The Northeastern Gulf Of Mexico, Valerie Joanna Cruz

Master's Theses

Live benthic foraminiferal assemblages were studied at contaminated and uncontaminated bathyal sites around the wellhead of the Deepwater Horizon oil spill. Samples collected in October of 2010 and 2011 and summer of 2012 were divided into uncontaminated (GIP 12, 21, K, and 25 and Obs0), moderately oiled (GIP 16 and 17) and heavily oiled groups (GIP 15), in which the TPAH concentrations ranged from 29 to 7,553 ng/g in 2010. Metric multidimensional scaling (MDS) and cluster analyses were conducted to compare all surface samples. Additionally, the heavily oiled site (GIP 15) and an uncontaminated site (GIP 25) were studied downcore …

Characterizing Populations Of Non-Coding Rnas In Karenia Brevis At Different Times Of The Diel Cycle, Scott Boyd Anglin

Master's Theses

Karenia brevis is a mixotrophic, marine dinoflagellate found in the Gulf of Mexico that generates periodic, if not annual, harmful algal blooms (also known as “red tides”) in certain coastal areas. In an effort to better understand the biology of this organism, a functional genomics project has been initiated. As part of that project, it has been determined that a significant number of natural antisense transcripts (NATs) as well as double-stranded RNA (dsRNA) molecules exist within the transcriptome of K. brevis. I hypothesize that the non-coding NATs, similar to microRNAs (miRNAs) in other organisms play a role in regulating …

Effects Of Road Salt On Asylum Lake Geochemistry, Davina A. Wyman

Masters Theses

Several studies indicate that seasonal applications of road deicers can lead to saline runoff entering surface water and groundwater, which can in turn change the chemistry, density, and physical mixing patterns of urban lakes. An investigation at Asylum Lake, an urban lake located near three major roadways, was conducted to determine the degree of road salt contamination in the lake, to determine if salt loading disrupts seasonal mixing patterns, and to determine the extent of redox stratification present due to eutrophic conditions. Samples were collected monthly from the deepest point in Asylum Lake over a 19-month period and analyzed for …

Selling Tradition: Impression Management And Draft Animal Agriculture Of A Mississippi Farmstead, Matthew Corbin Lance

Master's Theses

This thesis is a case study of a family of farmers in Mississippi’s Piney Woods who use horse-drawn equipment to grow crops. This practice is notable in the context of a larger agricultural system that prioritizes mechanization (particularly the use of tractors). The production style and their use of local direct selling via farmers markets allowed them to thrive economically because they were able to tap into a niche market of consumers desiring an alternative to the modern, conventional agricultural system.

Other literature on Alternative Food Networks (AFN) discusses the issues of alterity and appropriation—that is, whether AFN ventures are …

Identification And Characterization Of Msab Gene Involved In Biofilm Formation And Virulence In Staphylococcus Aureus, Amelsaad Elbarasi

Master's Theses

Staphylococcus aureus is an important human pathogen that causes a wide variety of life-threatening infections ranging from minor skin and oral infections to severe infections, such as bacteremia, pneumonia, osteomyelitis, or endocarditis due to the presence and secretion of a large number of virulence factors that are controlled by global virulence regulators in complex networks. Furthermore, S. aureus infections have become a threat to public health because of their high potential to form biofilm, and their ability to resist a wide range of antibiotics has exacerbated further. Therefore, understanding the regulatory networks and developing a drug targeting these networks has …

A Bibliometric Sketch On Environmental Science Literature With Special Reference To India’S Scenario, Bipin Bihari Sethi, Jyotshna Sahoo Lecturer, Basudev Mohanty

Library Philosophy and Practice (e-journal)

The present paper is prepared with the purpose to assess the publication trends of scholarly articles in the field of Environmental Sciences that are published in 75 Journals indexed under Science Direct Database during the period 2004 to 2010. It examines and presents an analysis of 645 research papers with a focus on Indian scenario. The study takes note scientifically from various angles such as: growth of literature, authorship pattern, degree of collaboration, geographical distribution of publications, distribution by journal, citation pattern, and ranking pattern etc. The study reveals that ‘USA’ as the most productive country among 67 participative nations …

Self-Assembled Gold Nanoplexes For Cancer-Targeted Sirna Delivery, Yongliang Shi

Master's Theses

Through layer-by-layer method, the authors have constructed three Au nanoplexes: AuPEI/RNA/PEI, AuPEI/RNA/PEI-mPEG, and AuPEI/NA/PEI-PEG-FA. All the nanoplexes are characterized by UV-vis spectrometry, DLS, and zeta potential. The surface density of the first layer PEI and second layer RNA were also determined. Moreover, the Au nanoplexes can protect siRNA from RNase degradation and are stable in cell culture medium.

siGLuc-ppp, ssRNA₈₀, and siF17 were delivered by the assembled Au nanoplexes, and the results were analyzed by GLuc assay, TB assay, and Luciferase assay. In terms of RNA delivery, the Au nanoplexes AuPEI/RNA/PEI exhibited excellent gene silencing efficiency (or causing …

Predictors Of Major Commitment, Anna Jill Womack

Master's Theses

Contextual (e.g. job fit, job involvement), individual (e.g. job satisfaction, need for achievement), and demographic (e.g. gender, educational level) factors have been related to forms of career commitment (i.e. affective, continuance, and normative commitment), highlighting that the commitment one feels toward his or her career is a complex variable. Furthermore, commitment has been associated with intent to remain within a profession or organization (Bowling, Beehr, & Lepisto, 2006; Den Hartog & Belschak, 2007; Duffy, Dik, & Steger, 2011; Goulet & Singh, 2002), suggesting that commitment is an important component of retention within a career. Correspondingly, commitment to one's academic major …

A Description Of Vocalizations And Their Association With Mouthing Behaviors And Social Context In Bottlenose Dolphins, Tursiops Truncatus, Christina Elyse Perazio

Master's Theses

Dolphin communication is multimodal and incorporates physical behaviors and vocalizations. Dolphins often exchange information with conspecifics using different types of vocalizations, and these vocalizations are sometimes associated with specific behaviors. However, the relationship of vocalization type and mouthing behavior type has not been investigated. This thesis examines simultaneous acoustic and visual recordings of bottlenose dolphins (Tursiops truncatus) to determine the relationship between type of mouthing behavior and type of vocalization (whistle, whistle-squawk, chirp, moan, burst-pulse type A, burst-pulse type B, and click trains). The role of the social context of a mouthing behavior is also evaluated. Data were obtained opportunistically …

Psychopathology And Sexual Addiction As Correlates Of Disordered Attachment, Natasha Lisa Laurent

Master's Theses

The current study examined associations between insecure adult romantic attachment and symptoms of psychopathology, disordered personality, and problematic sexual behaviors in a clinical sample of 402 men in treatment for sexual addiction. Anxious and avoidant attachment were hypothesized to correlate with certain constructs of psychopathology, disordered personality, and dimensions of problematic sexual behaviors. Multiple regression analyses were conducted to examine the hypothesized relationships using data from scales of the Minnesota Multiphasic Personality Inventory- 2-Revised Form (MMPI-2-RF), the Sexual Dependence Inventory – 4.0 (SDI – 4.0), and the Experiences in Close Relationships-Revised (ECR-R). Results suggested greater similarities than expected across higher-order …

Role Of Msaa Gene In Regulation Of The Msaabcr Operon And Biofilm Development In Staphylococcus Aureus, Ahmed Alzuway

Master's Theses

Staphylococcus aureus is an important human pathogen that causes wide variety of diseases ranging from chronic biofilm associated infection to acute life threatening infection such as bacteremia, pneumonia, osteomyelitis, or endocarditis, despite the progress with antibiotics used in the treatment of bacterial infections. Furthermore, increased use of prosthetic and indwelling devices in modern medical practices has led to increased infections due to S. aureus. Treating S. aureus infections have become difficult owing to its ability to resist most of the antibiotics; this problem is further exacerbated by ability of MRSA strains to form biofilms. Emergence of community-acquired methicillin resistance …

Characterization Of Rain And Stormwater Nitrogen Inputs To The Mississippi Sound: A Landscape Approach, Joshua Michael Allen

Master's Theses

Urbanization in coastal watersheds is becoming an increasingly important issue in the world. Increased impervious surface cover, a factor of urbanization, has drawn more attention to stormwater runoff as a source of contamination to receiving waters. In this study, nitrogen species from rain and stormwater were analyzed across three different landscape types along the Mississippi Sound (hardened, residential, and pristine), as well as from drainage pipes that flow directly into to the Mississippi Sound. Nitrogen stable isotopes were used to trace the stormwater nitrogen to the surface waters and biota within the Sound.

The objective of this study was to …

Revisiting The Feminine Mystique, Cynthia Fuchs Epstein

Publications and Research

No abstract provided.

Differentiation State-Specific Mitochondrial Dynamic Regulatory Networks Are Revealed By Global Transcriptional Analysis Of The Developing Chicken Lens., Daniel Chauss, Subhasree Basu, Suren Rajakaruna, Zhiwei Ma, Victoria Gau, Sara Anastas, Lisa A. Brennan, J. Fielding Hejtmancik, A. Sue Menko, Marc Kantorow

Department of Pathology, Anatomy, and Cell Biology Faculty Papers

The mature eye lens contains a surface layer of epithelial cells called the lens epithelium that requires a functional mitochondrial population to maintain the homeostasis and transparency of the entire lens. The lens epithelium overlies a core of terminally differentiated fiber cells that must degrade their mitochondria to achieve lens transparency. These distinct mitochondrial populations make the lens a useful model system to identify those genes that regulate the balance between mitochondrial homeostasis and elimination. Here we used an RNA sequencing and bioinformatics approach to identify the transcript levels of all genes expressed by distinct regions of the lens epithelium …

The Effects Of Perceived Gender Coaching Styles Of Female Coaches On Extrinsic Motivation Of Female Athletes On Team Sports, Cameron Sitler

Theses and Dissertations - UTB/UTPA

This study investigated the effect of perceived gender coaching style and gender stereotypes on the extrinsic motivation of female athletes. A t-test was utilized, with Masculine and feminine coaching styles as independent variables. The research question asked whether female athlete’s extrinsic motivation could be affect based on the type of gender coaching style used by female head coaches. H1 predicted that a masculine coaching style, respectively, would negatively influence the extrinsic motivation of female athletes. Fifty-four college female athletes filled out an online survey consisting of The Sport Motivation Scale (SMS) (Pelletier, Fortier, Vallerand, Tuson, Biere, and Blaise, 1995) and …

Y-Chromosome Polymorphism In United Arab Emirates, Safa Yaqoub Yousif Alkhayyat Al Hammadi

Theses

Human Y chromosome is a specific male marker and it consists of the largest non-recombining segment in human genome that is the hallmark of Y chromosome population-based studies.This stud establishes an extensive Y poly-morph ism profile of the U A E Population and to our knowledge, this is the largest study carried out in the UAE.

DNA samples were for 1 7 polymorphic STR from 345 unrelated Emirate male. In UAE population, the analysis of the allele frequency clearly shows that each u ha a predominant allele. It is also apparent that alleles for most loci are clustered over a …

Integrating Motivated Learning And K-Winner-Take-All To Coordinate Multi-Agent Reinforcement Learning, Teck-Hou Teng, Ah-Hwee Tan, Janusz Starzyk, Yuan-Sin Tan, Loo-Nin Teow

Research Collection School Of Computing and Information Systems

This work addresses the coordination issue in distributed optimization problem (DOP) where multiple distinct and time-critical tasks are performed to satisfy a global objective function. The performance of these tasks has to be coordinated due to the sharing of consumable resources and the dependency on non-consumable resources. Knowing that it can be sub-optimal to predefine the performance of the tasks for large DOPs, the multi-agent reinforcement learning (MARL) framework is adopted wherein an agent is used to learn the performance of each distinct task using reinforcement learning. To coordinate MARL, we propose a novel coordination strategy integrating Motivated Learning (ML) …

Citizen Science As A Real Environment For Authentic Scientific Inquiry, Nathan J. Meyer, Siri Scott, Andrea Lorek Strauss, Pamela L. Nippolt

Journal of Extension

Citizen science projects can serve as constructivist learning environments for programming focused on science, technology, engineering, and math (STEM) for youth. Attributes of rich environments for active learning (REALs) provide a framework for design of Extension STEM learning environments. Guiding principles and design strategies for the University of Minnesota Extension's Driven to Discover: Enabling Authentic Inquiry through Citizen Science project demonstrate how education and investigations grounded in real-world citizen science projects can capitalize on REAL environments to generate meaningful STEM learning. Positive evaluation results support the efficacy of the design for enhancing youth science identity and practice.

Living Close To Your Neighbors: The Importance Of Both Competition And Facilitation In Plant Communities, Alexandra Wright, Stefan A. Schnitzer, Peter B. Reich

Biological Sciences Faculty Research and Publications

Recent work has demonstrated that competition and facilitation likely operate jointly in plant communities, but teasing out the relative role of each has proven difficult. Here we address how competition and facilitation vary with seasonal fluctuations in environmental conditions, and how the effects of these fluctuations change with plant ontogeny. We planted three sizes of pine seedlings (Pinus strobus) into an herbaceous diversity experiment and measured pine growth every two weeks for two growing seasons. Both competition and facilitation occurred at different times of year between pines and their neighbors. Facilitation was important for the smallest pines when …

Disturbance And Clonal Reproduction Determine Liana Distribution And Maintain Liana Diversity In A Tropical Forest, Alicia Ledo, Stefan A. Schnitzer

Biological Sciences Faculty Research and Publications

Negative density dependence (NDD) and habitat specialization have received strong empirical support as mechanisms that explain tree species diversity maintenance and distribution in tropical forests. In contrast, disturbance appears to play only a minor role. Previous studies have rarely examined the relative strengths of these diversity maintenance mechanisms concurrently, and few studies have included plant groups other than trees. Here we used a large, spatially explicit data set from Barro Colorado Island, Panama (BCI) to test whether liana and tree species distribution patterns are most consistent with NDD, habitat specialization, or disturbance. We found compelling evidence that trees responded to …

A Qualitative Study Of Florida Tech Graduate Teaching Assistants’ Response To Coaching, Video Playback, And Coaching Paired With Video Playback With Regard To Their Concerns, Self-Reflections, And Practice Of Teaching, Angela Marie Fennell

Theses and Dissertations

Florida Tech’s campus-wide GTA professional development training, the GTA Seminar, has no clear theory on which it was designed, employs only measures of satisfaction and open-ended feedback, and performs limited follow-up on GTAs. Further, two pilot studies I conducted indicate that GTAs’ concerns may not be fully addressed by this seminar. This is notable because the GTA Seminar is often the only means of professional development available to more than half of the GTAs on campus. The purpose of my study was to investigate 13 GTAs’ teaching concerns, self-reflections, and practice when implementing three professional development sequences during their assignments …

Are New Jersey Birds Involved In The Enzootic Cycle Of Lyme Disease?, Heather Kopsco

Theses, Dissertations and Culminating Projects

Birds are well-established in cycles of zoonotic diseases, generally as hosts of an infected arthropod vector such as a mosquito or tick. Since the 1980s, research in both the United States and Europe has focused on their role in the ecology of Lyme disease and its causative agent, Borrelia burgdorferi, since they are fed upon by larval and nymphal ticks and can transport them and their associated diseases geographically during migrations. Further, research has shown that a number of avian species exhibit reservoir competency for B. burgdorferi which demonstrates that birds are involved in the enzootic cycles of the disease …

Persistent Hepatic Structural Alterations Following Nanoceria Vascular Infusion In The Rat, Michael T. Tseng, Qiang Fu, Khoua Lor, G. Rafael Fernandez-Botran, Zhong-Bin Deng, Uschi M. Graham, D. Allan Butterfield, Eric A. Grulke, Robert A. Yokel

Chemistry Faculty Publications

Understanding the long-term effects and possible toxicity of nanoceria, a widely utilized commercial metal oxide, is of particular importance as it is poised for development as a therapeutic agent based on its autocatalytic redox behavior. We show here evidence of acute and subacute adverse hepatic responses, after a single infusion of an aqueous dispersion of 85 mg/kg, 30 nm nanoceria into Sprague Dawley rats. Light and electron microscopic evidence of avid uptake of nanoceria by Kupffer cells was detected as early as 1 hr after infusion. Biopersistent nanoceria stimulated cluster of differentiation 3⁺ lymphocyte proliferation that intermingled with nanoceria-containing …

Can Gaming Be Used In The Nonprofit Sector For More Than Fundraising?, Brian Beaton

Occasional Papers

This paper explores new, game-based volunteering platforms in the sciences and discusses their viability for nonprofit organizations, which have long used gaming for fundraising but not typically in other aspects of their operations. The paper unfolds in two parts. Examples of game-based volunteering platforms in the sciences are examined in Part 1, and their broader significance discussed in regard to the history of science and the history of gaming. The games in question enable volunteers to work remotely with scientific research data and assist with data processing and information management. In Part 2, the paper outlines information management challenges in …

Sex Ratio Assessment Of Endangered Kemp’S Ridley Sea Turtle Foraging Populations: Validation Of A Testosterone Elisa For Juvenile Sex Determination, William A. Hilton, Camryn D. Allen

STAR Program Research Presentations

Currently all species of sea turtles are listed as threatened or endangered with extinction under the U.S. Endangered Species Act. In order to effectively construct management approaches we need as much information on various sea turtle populations as possible including demography, genetic origin, and critical habitat. One demographic piece of data that is lacking is the sex ratio of turtle populations in foraging habitats, as this information is integral in determining overall population abundance. Because secondary sex characteristics (i.e. males have longer tails) are not evident until turtles start to reach sexual maturity, the sex of juvenile turtles cannot be …

A Pre-Methodological Theology For Biblically Proper Ecclesiological Health, James Woods

Doctoral Dissertations and Projects

The American church is in a dramatically noticeable decline, with many resources offering superficial remedies and solutions but rarely digging below the surface to evaluate the structural integrity of the foundation. This paper will evaluate the foundation as to how it has been altered over the last two thousand years, as well as identifying three main foundational attributes of the first century church that must be in place for the twenty-first century church to be on target biblically. The thesis will be corroborated by utilizing two different, yet related surveys administered to both pastors and congregants, as well as by …

The Use Of Reading Strategies In Arabic By Native And Non-Native Speakers, Fahad Alolayan

Theses

With increasing opportunities to study abroad, learning to read in a foreign language has become increasingly important for countless second language learners. International students in pursuit of higher education degrees are required and expected to read in the target language at the same level of fluency and comprehension as their native-speaking counterparts. The number of international students studying in Arabic higher education institutions has followed the general ascending trend. For these second language speakers of Arabic, good reading skills in Arabic are essential for their academic success. Since the use of reading strategies is an important component of first and …

Regulation Of Glucose Metabolism By Alox8, Rabindra Karki

Theses

Type II diabetes is one of the leading cause of morbidity in the U.S. and other parts of the world. Insulin resistance which precedes Type II diabetes is a complex state of the body where the body fails to respond to insulin. Its complexity lies in its multifactorial origin that is to say various environmental and polygenic components come into play. Here we try to dissect one of these components - `Alox8' in transgenic mice and try to see if it affects blood glucose homeostasis. Comparison of glucose tolerance and insulin sensitivity among sixteen mice comprising of six wild type, …