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The Influence Of Metacommunity Size On Species Diversity Across Spatial Scales, Lauren Woods

Arts & Sciences Graduate Student Theses and Dissertations

This dissertation explores the influence of metacommunity size and landscape level processes, such as dispersal, on species diversity. A metacommunity is a group of local communities, or patches, connected by dispersal, and metacommunity size can be defined as the number of discrete local patches within a metacommunity. In chapter 1, I developed a framework to predict the effects of habitat destruction, or a reduction in metacommunity size, on the species richness of local patches of different sizes by integrating metacommunity theory with the equilibrium theory of island biogeography. The effect of metacommunity size on species richness in small and large …

Modulation Of Nmda Receptor Activity During Physiological And Pathophysiological Events, Christine Marie Emnett

Arts & Sciences Graduate Student Theses and Dissertations

N-methyl-D-aspartate receptors (NMDARs) are ionotropic glutamate receptors that serve crucial signaling and neurotrophic functions throughout the central nervous system. Both hyperfunction and hypofunction of NMDARs are associated with neurological and neuropsychiatric conditions. Thus, both positive and negative pharmacological NMDAR modulators are of clinical interest as treatments. Understanding drug mechanisms could lead to more rational drug design. Memantine and ketamine are NMDAR open channel blockers that exhibit similar pharmacodynamics at NMDARs but have different clinical uses. Memantine improves cognitive decline during Alzheimer's disease. Ketamine is an anesthetic and analgesic with psychotomimetic effects, but it is also a rapid acting and long-lived …

Kinetic Analysis And Inhibition Studies Of Iron-Dependent Histone Demethylases, Barbara Gordon Cascella

Arts & Sciences Graduate Student Theses and Dissertations

The research presented herein focuses on the kinetics and inhibition of the KDM4 subfamily of Jumonji C (JmjC) domain-containing histone demethylases (HDMs). Belonging to the larger class of alpha-ketoglutarate (alpha-KG)-dependent, non-heme iron monooxygenases, the JmjC-HDMs remove methyl groups from mono-, di-, and tri-methylated histone lysine residues through an Fe(IV)-oxo-catalyzed hydroxylation reaction. JmjC-HDMs have been found to play integral roles in the maintenance of genomic integrity as well as in the regulation of transcription. Three KDM4 members were studied: the mixed H3K9/H3K36 demethylases KDM4A and KDM4C, and the pure H3K9 demethylase KDM4E. KDM4C is a hypoxia-inducible factor 1 (HIF-1) target gene …

Study Of Ii-Vi Colloidal Semiconductor Magic-Size Nanoclusters And Crystalline Quantum Platelets, Yuanyuan Wang

Arts & Sciences Graduate Student Theses and Dissertations

The main objective of this project is to prepare and isolate the smallest, discrete, magic-size nanoclusters of cadmium selenide (CdSe) and to grow crystalline, wurtzite CdSe quantum platelets (QPs) at room temperature. The achievement of these goals enables us to provide a general synthesis of II-VI semiconductor magic-size nanoclusters and low-temperature routes to well-passivated nanocrystals having a range of compositions and morphologies.The magic-size nanocluster (CdSe)13 is grown in a lamellar-bilayer soft template at room temperature. The results described in this thesis strongly suggest that [(CdSe)13(n-octylamine)13] is the most thermodynamically stable nanocluster and serves as a key intermediate in the formation …

Zinc And Copper Isotopic Fractionation During Planetary Differentiation, Heng Chen

Arts & Sciences Graduate Student Theses and Dissertations

Zinc and copper are two important transition metal elements that are widely involved in every stage of planetary formation and differentiation. Their isotopic ratios are robust tracers used to understand the origin of the Solar System, planetary formation and differentiation processes. In this thesis, I focus on their isotopic behaviors during magmatic processes. I report the Zn isotopic compositions of representative igneous rocks to determine potential isotopic fractionations associated with magmatic processes, and to estimate the bulk silicate Earth value. I report isotopic compositions of various groups of iron meteorites (samples of which represent the core of asteroids) and discuss …

Tuning Electronic Correlation With Pressure, Gilberto Fernandes Lopes Fabbris

Arts & Sciences Graduate Student Theses and Dissertations

Strongly correlated electron systems display some of the most exotic ground states in condensed matter. In this thesis high pressure is used to tune the degree of electron correlations in systems of current interest. Their electronic and structural properties were investigated at high pressure using x-ray spectroscopy and scattering as well as transport techniques in a diamond anvil cell. The interplay between short- and long-range structural order, one-dimensional charge ordering, and superconductivity was studied in La_1.875Ba_0.125CuO₄. At ambient pressure, this material displays charge ordering at the onset of a low temperature structural phase transition, …

Gothic Literature And The Politics Of Indistinction, Nicholas Everett Miller

Arts & Sciences Graduate Student Theses and Dissertations

I recover the Gothic as a literature of political possibility. While scholars have long associated the Gothic tradition with political fear, I argue that Gothic novels challenge liberal ideas of the self to produce a sometimes radically egalitarian politics of freedom in the late-eighteenth and early-nineteenth centuries. Edmund Burke made much of the fearfulness of an egalitarian politics in the 1790s, and literary historians have relied on his influence to argue that Gothic fiction is primarily an expression of the fear that comes with the collapse of familial, social, and political distinctions. But fear is not all that accompanies such …

Commentary, Illustration, And Cross-Generic Writing In Paired Editions Of Xixiang Ji And Pipa Ji, Yinghui Wu

Arts & Sciences Graduate Student Theses and Dissertations

This study examines the reproduction and consumption of popular playsXixiang ji(The Story of the Western Wing) andPipa ji(The Lute) as a related pair in seventeenth-century China. During this period, a thriving economy and rapid urbanization stimulated the expansion of commercial publishing. A book market flourished with a bewildering variety of texts and pictures and inventive regroupings of existing materials. Seventeenth-century China has long been recognized as an age of individual creativity, with the elite literati as primary agents, but this study revises the picture by directing attention to the appropriation and transformation of the cultural ideal of "creativity" through the …

Minutes, Graduate Council Meeting, December 15, 2014, University Of South Florida St. Petersburg. Graduate Council

USF St. Petersburg Graduate Council Meetings

Minutes of the December 15, 2014, meeting of the University of South Florida St. Petersburg's Graduate Council.

"The Garden Of Forking Paths": Islamic Legal Transformations In The Ottoman Empire During The Nineteenth Century, John Bugnacki

History & Classics Undergraduate Theses

In the popular imagination, misconceptions abound regarding islamic law. Many outside of the Islamic world believe that Islamic law consists of a discrete series of inviolable, unchanging commands. However, both in historical and contemporary contexts, this characterization is false. The different legal schools within Islamic law have evolved and changed over time in response to surrounding conditions and other legal traditions that have existed alongside it. In the Ottoman Empire this process was particularly evident and, during the nineteenth century, its main tradition of Islamic law underwent an unprecedented transformation that would seek to combine Islamic legal principles within statist …

Mental Disorders, Mental Health Problems, And Treatment Among Army Recruiters And Recruiting Candidates, 2011-2013: An Examination Of Current Rates In The Recruiting Population, Chadwick Karl Knight

Theses and Dissertations

Purpose: This study sought to determine the prevalence and severity of mental health disorders (MHDs) and/or mental health problems (MHPs) and types of treatments received among soldiers who have or will serve as recruiters. Research Design and Methods: Data were collected between October 2011 to July 2013 from active duty soldiers (N=2,783) attending courses on Fort Jackson at the U.S. Army’s Recruiting and Retention School (RRS). Students consisted of regular active duty soldiers and activated Guard/Reservist that were either recruiters or recruiting candidates. The medical records of participating recruiters and recruiting candidates were reviewed for the prevalence of MHDs and …

Beyond Marriage And Motherhood: The Motifs Involved In The Portrayal Of Women In Literature, Hannah Hunter

Honors Theses

When I was in elementary school most of the books that I voluntarily read featured female characters. Part of the reason was that it was expected of me and those books (about girls/women) were the ones recommended to me. Another part was that female characters were the ones I could most closely relate to. They gave me ideas about what it is to be a woman, and subtly led me to approach the question of what kind of woman I wanted to be. It took me years to really pick up on the stereotypes and recurring female characters, and it …

Mixture Cure Models: Simulation Comparisons Of Methods In R And Sas, Myra Robinson

Theses and Dissertations

Typical survival methods have the assumption that every subject will eventually experience the event of interest, given enough follow-up time. However, there are some occasions in which a proportion of the population of interest will never experience the event of interest. Therefore, the incorporation of a “cure” fraction in a statistical model is necessary. In this thesis, I comprehensively evaluate mixture cure models in two different statistical software programs: the smcure package in R and the PSPMCM macro in SAS. Extensive simulation studies in R and SAS allow evaluation of the performance of these two models. An additional aspect of …

Global Climate Change And The Southern Ocean: How Antarctic Fishes Physiologically Respond To A Changing Environment From The Cellular To The Organismal Level, Laura A. Enzor

Theses and Dissertations

Studies have projected that future changes in sea surface temperature and pCO2 levels will impact higher latitudes to a greater extent than in temperate regions. For notothenioid fishes of the Southern Ocean, evolution in extremely stable, cold waters has resulted in several adaptations which have left these fishes poorly prepared for global climate change. I have analyzed the metabolic and cellular response of Trematomus bernacchii, Pagothenia borchgrevinki and Trematomus newnesi to a long-term, multi-stressor scenario relevant to the predicted changes in the Southern Ocean. By combining whole animal respirometry with cellular level analysis of energy allocation, osmoregulatory mechanisms and cellular …

Mcp-1 In Colorectal Cancer: Benefits Of Exercise, Jamie Lee Mcclellan

Theses and Dissertations

The etiology of colon cancer is a complex phenomenon that involves both genetic and environmental factors. However, only about 20% have a familial basis with the largest fraction being attributed to environmental causes that can lead to chronic inflammation. Tumors associated macrophages drive the pro-inflammatory response in the tumor micro-environment and are associated with poor prognosis in certain cancers. Monocyte chemoattractant protein 1 (MCP-1) is thought to be the most important chemokine for recruitment of macrophages to the tumor microenvironment. In chapter 1, we examined the timing and magnitude of the intestinal inflammatory cytokine response in relation to tumorigenesis in …

Methods For Identifying Regions Of Brain Activation Using Fmri Meta-Data, Meredith A. Ray

Theses and Dissertations

Functional neuroimaging is a relatively young discipline within the neurosciences that has led to significant advances in our understanding of the human brain and progress in neuroscientific research related to public health. Accurately identifying activated regions in the brain showing a strong association with an outcome of interest is crucial in terms of disease prediction and prevention. Functional magnetic resonance imaging (fMRI) is the most widely used method for this type of study as it has the ability to measure and identify the location of changes in tissue perfusion, blood oxygenation, and blood volume. In practice, the three-dimensional brain locations …

The Geologic Implications Of The Factors That Affected Relative Sea-Level Positions In South Carolina During The Pleistocene And The Associated Preserved High-Stand Deposits, William Richardson Doar Iii

Theses and Dissertations

This work utilizes the current understanding of South Carolina geology to provide a stratigraphic review of the late-Pliocene and Pleistocene marine deposits. Almost two centuries of recorded geological study includes geomorphic and stratigraphic units that were described, proposed, revised, abandoned, and revived. Along with the history of the age assignments, changes in geological time scales, and the changes in the understanding of geological concepts, this review is necessary because two concurrent and conflicting stratigraphies exist for late-Pliocene and Pleistocene marine sediments that record multiple sea-level transgressions that were more often destructive than constructive. The result, when tested against existing geological …

Scheduling Of Container Handling Equipment In Marine Container Terminals, Narges Kaveshgar

Theses and Dissertations

To improve the competitiveness of marine container terminals, it is critical to minimize the makespan of a container vessel. The makespan is defined as the latest completion time among all handling tasks of the container vessel. Lower makespan (i.e. lower vessel turn time) can be achieved through better scheduling of the container handling equipment during vessel operations. The scheduling of terminal equipment is an operational problem, and a detailed schedule for each type of equipment operating in the terminal is necessary. Several studies have applied operations research techniques to optimize the processes of equipment in a terminal. This dissertation investigates …

Beliefs, Practices, And Preservice Teachers: A Case Study, Janie Riddle Goodman

Theses and Dissertations

Existing in the chronology of content area literacy instruction is a convincing body of research that supports the role of strategic learning in students’ literacy development. However, much of what is known about teaching reading comprehension strategies is not part of the instruction found in many secondary classrooms. Even though studies have shown how students benefit from using comprehension strategies, the instructional necessities for teaching those strategies are not part of many secondary teachers’ practices. Additionally, the historical focus on literacy practices and strategies is shifting towards attention on the critical role of the disciplines in secondary literacy and the …

The Cardio-Protective Effects Of Substance P In Both Ischemia/Reperfusion And And Short-Term Hypoxia Rat Models, Shaiban Jubair

Theses and Dissertations

Substance P, a member of the tachykinin family, is found primarily in sensory nerves. In the heart, substance P-containing nerve fibers surround coronary vessels, making them ideally positioned to sense changes in coronary pressure and/or flow. Recent studies have identified substance P as being protective acutely following ischemia-reperfusion due to its ability to induce coronary blood vessel vasodilation. In addition, studies conducted on non-cardiac tissue have reported substance P to be protective against cell death through a mechanism involving activation of anti-apoptotic AKT pathway. However, the possibility of substance P being similarly cardioprotective has not been reported. Accordingly, the purpose …

Early Screening And Identification Of Preschool Children Affected By Serious Emotional Disorders, Cathy Renee Robey-Williams

Theses and Dissertations

Mental illness has surpassed physical health problems as the leading cause for morbidity and mortality in American children. National prevalence of serious emotional disorders in the 0-5 age group has ranged from 9.5% to 14.2%. Of the 15 million children affected by mental illness, less than 20- 25% receive any treatment. Nationwide, early screening, identification, and treatment of preschoolers with emotional or behavioral disorders have become a critical priority in order to reduce the increasing burden of healthcare costs for mental illness and psychiatric care. The purpose of this study was to test the feasibility of a screening process for …

Situating Belonging Through Multi-Sited Identities: Community Building Among Middle Eastern Christians In Upstate South Carolina, Amelia Ayoob

Theses and Dissertations

This thesis is a Human Geography perspective on immigrant identity and integration. Using the case of a diverse, multigenerational Middle Eastern Christian population in the Upstate region of South Carolina, I explore how Middle Eastern immigrants and their descendants have negotiated belonging and identity in the United States by simultaneously building new social networks in the Upstate and maintaining ties to the Middle East. The focus on a single case allowed for an in-depth exploration of how geographic and historical contexts have shaped the present-day dynamics of the community (broadly defined) constructed around two Catholic churches, one Latin and one …

Temporal Constraints On Holocene Initiation And Termination Of Mound Development At An Episodic Gas Hydrate And Cold Seep System, Woolsey Mound, Northern Gulf Of Mexico, Nathan Robinson

Theses and Dissertations

Woolsey Mound is a thermogenic gas hydrate and cold seep system in the deepwater (900m) Gulf of Mexico. A set of sub-bottom seismic profiles acquired at MC-118 Woolsey Mound provide decimeter-scale vertical resolution of the upper ~50m of the subsurface throughout the lease block. Integration of these data with radiocarbon, lithostratigraphic, and biostratigraphic data from shallow gravity cores provides the basis for detailed interpretation of the mound evolution within the last 12,000 years. Uniform sedimentation during the Last Glacial Maximum and following changes in sediment distribution over MC-118 suggests modern mound activity did not begin until at least ~12ka. Development …

Nuns In The Newsroom: The Sisters Of Marillac College And U.S. Sisters’ Involvement In Social Justice Reform, Elizabeth D. Nako

History & Classics Undergraduate Theses

"Nuns in the Newsroom: The Sisters of Marillac College and U.S. Sisters' Involvement in Social Justice Reform" is a senior honors history thesis project.  The Second Vatican Council (1962-1965) was guided by the spirit of aggiornamento, or “a bringing up to date” of the Catholic Church.  As a result of Vatican II documents such as Gaudium et Spes, they influenced U.S. sisters to expand their ministry from performing works of mercy to advocating for legal, economic, and social justice in addition to their charitable endeavors.  However, after doing research at the Daughters of Charity Archives in Emmitsburg, Maryland and …

Monnet, The General, And The Community Of Six: French Policy On European Integration In The 1950s And 1960s, Daniel A. Gagnon

History & Classics Undergraduate Theses

This thesis examines the roles of Jean Monnet and General Charles de Gaulle in crafting French policy towards a united Europe during the postwar decades. Monnet strongly supported supranational integration in which the nations of Europe cede power to common governing institutions. But, French policy changed dramatically when de Gaulle came to power in 1958. As a nationalist he refused to sacrifice France’s independence by ceding power to the common institutions. He risked the existence of a united Europe, but after his sudden departure in 1969 it became clear that French popular opinion opposed his limiting policy towards European integration.

Mapping Interdisciplinary Fields: Efficiencies, Gaps And Redundancies In Hiv/Aids Research, Jimi Adams, Ryan Light

Faculty Publications

While interdisciplinarity continues to increase in popularity among funders and other scientific organizations, its potential to promote scientific advances remains under-examined. For HIV/AIDS research, we examine the dynamics of disciplinary integration (or lack thereof) providing insight into a field's knowledge base and those questions that remain unresolved. Drawing on the complete histories of two interdisciplinary journals, we construct bibliographic coupling networks based on overlapping citations to identify segregation into research clusters and estimate topic models of research content. We then compare how readily those bibliographic coupling clusters account for the structuring of topics covered within the field as it evolves …

Ultrasound-Mediated Optical Imaging And Focusing In Scattering Media, Yuta Suzuki

McKelvey School of Engineering Graduate Student Theses & Dissertations

Because of its non-ionizing and molecular sensing nature, light has been an attractive tool in biomedicine. Scanning an optical focus allows not only high-resolution imaging but also manipulation and therapy. However, due to multiple photon scattering events, conventional optical focusing using an ordinary lens is limited to shallow depths of one transport mean free path (lt'), which corresponds to approximately 1 mm in human tissue.

To overcome this limitation, ultrasonic modulation (or encoding) of diffuse light inside scattering media has enabled us to develop both deep-tissue optical imaging and focusing techniques, namely, ultrasound-modulated optical tomography (UOT) and time-reversed ultrasonically encoded …

The Effects Of Gamifying Optional Lessons On Motivation, Aaron Zemach

McKelvey School of Engineering Graduate Student Theses & Dissertations

Adding video-game elements to non-video-game interfaces (“gamification”) has become a common engagement strategy over the past several years in the domain of education. While prior studies have found that adding game elements to mandatory educational materials can increase students’ motivation to complete the materials, there has yet to be a study to investigate if game elements can make users more likely to engage with optional educational materials. In this study, we investigate whether users of a gamified educational interface are more motivated than users of a non-gamified interface to voluntarily complete educational materials. We found users of a gamified interface …

Real-Time And Energy-Efficient Routing For Industrial Wireless Sensor-Actuator Networks, Chengjie Wu

McKelvey School of Engineering Graduate Student Theses & Dissertations

With the emergence of industrial standards such as WirelessHART, process industries are adopting Wireless Sensor-Actuator Networks (WSANs) that enable sensors and actuators to communicate through low-power wireless mesh networks. Industrial monitoring and control applications require real-time communication among sensors, controllers and actuators within end-to-end deadlines. Deadline misses may lead to production inefficiency, equipment destruction to irreparable financial and environmental impacts. Moreover, due to the large geographic area and harsh conditions of many industrial plants, it is labor-intensive or dan- gerous to change batteries of field devices. It is therefore important to achieve long network lifetime with battery-powered devices.

This dissertation …

Human Trafficking & Native Peoples In Oregon: A Human Rights Report, Haley Weedn, Joseph Scovel, Jason Juran

American Indian Law Journal

No abstract provided.