Digital Commons Network^™

Small Group Interactions In Wiki-Based Collaborative Writing In The Eap Context, Mimi Li

USF Tampa Graduate Theses and Dissertations

Due to recent developments in Web 2.0 technologies, computer-mediated collaborative writing has captured the growing attention of second language researchers and instructors. The affordance of wikis for collaborative writing has been hailed, but few studies have explored the nature of wiki collaboration and interaction during small group writing using wikis. This dissertation investigated dynamic group interactions in wiki-based collaborative writing tasks in an English for Academic Purposes (EAP) course at a southeastern public research university in the U.S. A total of twenty-nine English as a Second Language graduate students collaboratively worked on two writing tasks within small groups in Wikispaces …

An Analysis Of Public Perception And Response To Hurricane Sandy, Lindsay L. Rice

USF Tampa Graduate Theses and Dissertations

Hurricane Sandy made landfall in Brigantine, New Jersey on October 29th, 2012. The storm impacted the coastal regions of New Jersey and New York, especially the heavily populated area of New York City. This research, which analyzes secondary data obtained from a telephone survey, investigates the public response of residents before, during and after Hurricane Sandy. The survey consisted of questions regarding what the residents expected concerning the threat of Hurricane Sandy, whether it matched what they experienced, where they got their information and how they made their decision to evacuate or not. The results from the survey were statistically …

Historical And Current Status Of Springs In The Kingdom Of Saudi Arabia, Kamal Mousa Aljohani

USF Tampa Graduate Theses and Dissertations

This research was conducted to update previous studies of the springs of the Kingdom of Saudi Arabia. Approach: Revisit every spring that was recorded previously to ascertain the current status, water quality and zooplankton communities. Results: fourteen springs out of forty six were still flowing. Several springs in the Eastern Province were structurally changed into manmade pools. Also, one new spring was located and documented in the northwestern region. Zinc and copper in several springs were the common dissolved heavy metals and have had exceeded the safe drinking water standards according to World Health Organization. Fourteen zooplankton taxa was found, …

Response Of Benthic Foraminifera To Ocean Acidification And Impact On Florida's Carbonate Sediment Production, Paul O. Knorr

USF Tampa Graduate Theses and Dissertations

Increasing concentrations of atmospheric CO2 are in dynamic equilibrium with the oceans. The absorption of CO2 by seawater causes a decrease in seawater pH and calcite saturation state (SS). This process, termed ocean acidification, exerts deleterious effects on marine calcifiers. Studies of symbiont-bearing large benthic foraminifera (LBF) have reported a generally unfavorable response to increased concentrations of carbon dioxide ([CO2]).

Experiments and analyses were undertaken to examine the effect of increased [CO2] on the growth rate, ultrastructure, stable isotopes of carbon and oxygen, as well as Mg/Ca of the high-Mg miliolid Archaias angulatus and the low-Mg rotalid Amphistegina gibbosa. A …

Combination Of The Computational Methods: Molecular Dynamics, Homology Modeling And Docking To Design Novel Inhibitors And Study Structural Changes In Target Proteins For Current Diseases, Katherine Cristina Parra

USF Tampa Graduate Theses and Dissertations

In this thesis, molecular dynamics simulations, molecular docking, and homology modeling methods have been used in combination to design possible inhibitors as well as to study the structural changes and function of target proteins related to diseases that today are in the spotlight of drug discovery. The inwardly rectifying potassium (Kir) channels constitute the first target in this study; they are involved in cardiac problems. On the other hand, tensin, a promising target in cancer research, is the second target studied here.

The first chapter includes a brief update on computational methods and the current proposal of the combination of …

Host-Parasite Interactions In An Invasive Songbird, Courtney A.C. Coon

USF Tampa Graduate Theses and Dissertations

Introduced species are the greatest threat to biodiversity after habitat loss. Understanding the processes that permit organisms to become successful invaders may provide opportunities to prevent or limit their dispersal and establishment and thereby alleviate some of their harmful effects. The goal of my dissertation research has been to investigate whether invasive species have distinctive interactions with parasites, and some of the mechanisms that may underlie that variation. I used one of the world's most successful vertebrate invaders as a case study: the house sparrow (Passer domesticus; Introduction).

Previous research in the house sparrow suggested that loss of …

Regulatory Roles Of Facit Collagens Xii And Xiv In Cornea Stromal And Endothelial Development And Function, Chinda Hemmavanh

USF Tampa Graduate Theses and Dissertations

Purpose:

Corneal transparency depends upon the precise organization of corneal stromal extracellular matrix and corneal endothelial function. Stromal structure and extracellular matrix organization is responsible for proper refraction of light into the eye. The corneal endothelium is responsible for pumping excess fluid out of the cornea, effectively maintaining corneal hydration and thickness. Corneal transplantation is the current form of treatment for corneal endothelial and stromal dystrophies. The mechanisms controlling stromal collagen fibril packing and organization into orthogonal layers as well as maturation of the endothelium into a fully functioning cellular layer are unknown. Collagens XII and XIV, fibril associated collagens …

Balanced Artistry: Describing And Explaining Expert Teacher Practice As Adaptive Expertise, Nina Graham

USF Tampa Graduate Theses and Dissertations

This work was possible through the support of my personal and professional families. Personally, my husband Brad was my continual encourager through each phase of this journey. This accomplishment is as much his as mine. Also, through this process I feel I have matured at the hands of the Lord through His careful, peaceful leading within the many nuanced steps of completing the doctoral program. Professionally, the ladies forming my doctoral committee have been more than advisors, but mentors. Their thoughtful counsel helped me feel capable throughout the many phases of becoming a researcher and scholar, yet they offered insight …

An Investigation Into The Habitat, Behavior And Opportunistic Feeding Strategies Of The Protected Goliath Grouper (Epinephelus Itajara), Angela Collins

USF Tampa Graduate Theses and Dissertations

Groupers (Epinephelidae: Epinephelinae) are apex predators within many reef communities worldwide. Grouper landings contribute significantly to global fisheries, and many populations are suffering from unsustainable levels of exploitation. The large size, site specificity and catchability of most groupers increase susceptibility to fishing pressure, and a large number of grouper species throughout the world are currently overfished. Multiple species are listed as endangered or threatened, and many have suffered local extirpations across their range. Removal of these upper level predators can significantly alter community structure and result in second order effects that may have critical ecological implications. The economic and ecological …

I Did That Wrong And It Sounded Good: An Ethnographic Study Of Vernacular Music Making In Higher Education, Victor Ezquerra

USF Tampa Graduate Theses and Dissertations

The purpose of this ethnographic study was to examine vernacular music making in higher education. The participants, undergraduate music education majors (N=23 for Fall, N=10 for Spring), were investigated throughout the course of the 2012-2013 academic year. A constructivist philosophical framework was applied and data were collected using several methodologies including participant observation, journals, interviews, and audiovisual and multimedia methods. Results showed that students were able to successfully learn, create, and share music in a vernacular manner. Participants took a pragmatic approach to making music. Furthermore, students engaged several aspects of music making they had not encountered in traditional music …

Essays On Mergers And Acquisitions, Marcin Krolikowski

USF Tampa Graduate Theses and Dissertations

This dissertation includes two essays that examine mergers and acquisitions. In the first essay we examine how pay-for-performance influences the quality of merger decisions before and after Sarbanes-Oxley (SOX). Pay-for performance has a significant positive effect on acquirer returns of 0.9% pre-SOX and 1.1% post-SOX around the three day event window. Bidders with high pay-for-performance pay a 23.3% lower merger premium in listed target acquisitions. The positive effect of pay-for-performance is more important for public target acquisitions overall, for small acquirers pre-SOX, and for large acquirers post-SOX. In the long-run, bidders with high pre-merger pay-for-performance experience 27.6% higher returns after …

Subversive Beauty - Victorian Bodies Of Expression, Lisa Michelle Hoffman-Reyes

USF Tampa Graduate Theses and Dissertations

Abstract

My dissertation seeks to bring aesthetics into conversation with the epistemological concerns of three Victorian texts, in response to the prevalence of beautiful feminine faces and bodies in Victorian texts, their presence amplified through the use of copious description. I examines the ways that Thomas Hardy, Oscar Wilde, and Robert Browning complicate traditional contemporary assumptions regarding behaviors and moralities through their constructions of feminine beauty. These writers challenge and dispute a variety of Victorian social norms imposed upon both men and women, most notably the mandate to adhere to prescribed behaviors that codify in order to regulate gender normativity. …

Interregional Interaction And Dilmun Power In The Bronze Age: A Characterization Study Of Ceramics From Bronze Age Sites In Kuwait, Hasan Ashkanani

USF Tampa Graduate Theses and Dissertations

The Dilmun civilization appeared in the Mesopotamian sources as a land of Eden and a supplier of ivory, copper, pearls and dates whose boats reached Ur ports. After the collapse of the Akkadian power in the second half of the third millennium BC, Dilmun underwent some notable changes in different aspects of life. The presence of planned residential settlements with notable architectural features and numerous burial complexes and `Royal Mounds' in Bahrain marked great economic growth and socio-political development in the early second millennium BC, suggesting the emergence of a stratified social hierarchy.

Furthermore, these changes suggest that a centralized …

Paternal Support For Breastfeeding: A Mixed Methods Study To Identify Positive And Negative Forms Of Paternal Social Support For Breastfeeding As Perceived By First-Time Parent Couples, Amy Lester

USF Tampa Graduate Theses and Dissertations

The American Academy of Pediatrics recommends that babies be exclusively breastfed for the first six months of life, and continue to breastfeed throughout the first year of life and as long after as is mutually desired. Recent survey data suggests that initiation rates of breastfeeding are high; according to the CDC, 75.0 percent of children in the U.S. have been breastfed. Although initiation rates of breastfeeding are high, breastfeeding duration rates consistent are much lower; 33.0 percent of infants were exclusively breastfed at three months, and only 13.3 percent of infants were exclusively breastfed at six months. Additionally, only 22.4 …

Spatiotemporal Distribution Of Genus Culex (Diptera: Culicidae) In Usf Ecopreserve, Hillsborough County, Florida, Emily Schwartz

USF Tampa Graduate Theses and Dissertations

Within the state of Florida, there are three arboviruses of public health importance that can cause neuroinvasive disease in humans: West Nile Virus, Saint Louis Encephalitis Virus, and Eastern Equine Encephalitis Virus. Mosquitoes (Diptera: Culicidae) within the genus Culex are known and suspected vectors of these diseases. The vectors of these diseases can be present in urban wetland habitats that allow for exposure to residential communities. Vector ecology must be investigated in order to understand the dynamics of disease transmission. In Hillsborough County, Florida the spatial and temporal distribution of these vectors are not well established. An ecological study was …

A 3-D Pseudo-Rigid-Body Model For Rectangular Cantilever Beams With An Arbitrary Force End-Load, Jairo Renato Chimento

USF Tampa Graduate Theses and Dissertations

This dissertation introduces a novel three-dimensional pseudo-rigid-body model (3-D PRBM) for straight cantilever beams with rectangular cross sections. The model is capable of capturing the behavior of the neutral axis of a beam loaded with an arbitrary force end-load. Numerical integration of a system of differential equations yields approximate displacement and orientation of the beam's neutral axis at the free end, and curvatures of the neutral axis at the fixed end. This data was used to develop the 3-D PRBM which consists of two torsional springs connecting two rigid links for a total of 2 degrees of freedom (DOF). The …

Generic Competition And Price Regulation In The European Union Pharmaceutical Market: The Case Of Cardiovascular Medicines, Berna Colak

USF Tampa Graduate Theses and Dissertations

The purpose of this dissertation is to examine the extent of competition between generic products and therapeutic substitutes under different regulatory regimes in the European Union

(EU) pharmaceutical industry. In particular, this study investigates generic competition among the five largest European pharmaceutical markets; the United Kingdom, Germany, France, Italy

and Spain, with comprehensive IMS data for 10 years (1994-2003), in order to estimate the effect of generic entry on drug prices at the product level. This analysis finds that generic entry

has a negative effect on prices in countries with free pricing originator market, whereas in EU countries with strict …

Greenhouse Gas Emissions And Climate Policy In Florida's State And Local Governments (2000 To 2010), Sandra Jo Garren

USF Tampa Graduate Theses and Dissertations

The purpose of this dissertation is to assess the current state of climate policy and greenhouse gas (GHG) emission trends in the state Florida and its local governments. The research is guided by three research questions 1) What has been the policy response from state and local governments to the threat of climate change; 2) What were the GHG emission trends from 2000 to 2010 in Florida and its local governments and what were the drivers of change?; and, 3) what were the issues related to the data and methodologies to quantify GHG emissions at the local government level? Policymakers …

It's About Time: Dynamics Of Inflationary Cosmology As The Source Of The Asymmetry Of Time, Emre Keskin

USF Tampa Graduate Theses and Dissertations

This project is about the asymmetry of time. The main source of discontent for physicists and philosophers alike is that even though in every physical theory we developed and/or discovered for explaining how the universe functions, the laws are time reversal invariant; there seems to be a very genuine asymmetry between the past and the future. The aim of this project is to examine several attempts to solve this friction between the laws of physics and the asymmetry and provide a new proposal that makes use of modern cosmology. In the recent history of physics and in contemporary philosophy of …

Photocatalysis And Grazing-Ion Beam Surface Modifications Of Planar Tio2 Model Systems, Timothy Luttrell

USF Tampa Graduate Theses and Dissertations

This dissertation is related to the understanding of catalytic reactions of metal oxides. For several decades, the surfaces and bulk of materials have been probed to determine additional properties that relate to photocatalytic applications. This investigation furthers these efforts by the (a) modification of a metal oxide surface to isolate known influences of chemical properties and (b) proposing and utilizing a novel methodology for attribution of photocatalytic activity to a discernable influence. For the first effort, by effectively utilizing a known technique for a new application on a metal oxide, such isolations can be made despite unfavorable states. For the …

Atmospheric And Ocean Conditions And Social Aspects Associated With Rip Current Drownings In The United States, Charles Hugh Paxton

USF Tampa Graduate Theses and Dissertations

The purpose of this research is to provide a better understanding of the physical and social aspects of rip currents in ocean areas that will lead to better forecasts, better governmental policies in beach areas, and ultimately to save lives. A rip current is a nearshore circulation in which breaking waves run up onto the beach then retreat rapidly in deeper channels back toward the sea. Rip currents pose a significant threat to beachgoers and can pull even the strongest swimmers out to sea. The primary factors associated with rip current formation on unarmored beaches are variations in the local …

An Examination Of Cooperating Teachers' Observations Of Their Student Teachers In The Areas Of Personal, Teaching, And Musical Skills In The Elementary Classroom, Mark Remsen Cole

USF Tampa Graduate Theses and Dissertations

The purpose of this descriptive study was to examine the observations of elementary school music teachers regarding the level of preparation of their most recent student teachers at the beginning of their student teaching experience. Twenty-seven elementary music teachers participated in a survey rating the preparedness of their student teacher in the areas of personal, teaching, and musical skills, and provided free-response feedback concerning the skills and abilities they observed as strong and weak. These responses were compared to the 1997 research completed by David Teachout, where preservice teachers and experienced teachers were asked to list what they felt were …

A Multi-Case Study Of Student Interactions With Educational Robots And Impact On Science, Technology, Engineering, And Math (Stem) Learning And Attitudes, Stephanie Holmquist

USF Tampa Graduate Theses and Dissertations

The demand for STEM trained workers continues to increase not only in the United States, but globally. Reports have indicated that the United States is not doing a good job encouraging students to pursue STEM oriented degrees. In particular, it has become increasingly important to emphasize STEM connections at an early level in order to encourage student career exploration as they continue their education. Educational robots represent a unique alternative to traditional methods, especially at the elementary level. Considering the use of educational robots have largely been ignored at this level, the purpose of this study was to describe the …

Improving Spectrophotometric Carbon System Measurements, Mark Patsavas

USF Tampa Graduate Theses and Dissertations

This work provides improved procedures for spectrophotometric carbon system measurements. Indicator dyes used for routine spectrophotometric pH measurements in seawater suffer from impurity issues, which introduce vendor-specific systematic errors in pH determinations. The magnitude of these errors for several vendors was investigated for meta Cresol Purple (mCP) and Cresol Red (CR). Flash chromatography procedures were developed to obtain purified mCP and CR on a bulk scale in order to supply the oceanographic research community with the indicators. Easy access to the purified indicators ensures global intercomparability of spectrophotometric pH determinations.

Internal consistency of marine inorganic carbon system measurements was studied …

Solvent Dependent Molecular Mechanics: A Case Study Using Type I Collagen, Heather Harper

USF Tampa Graduate Theses and Dissertations

Being the most abundant protein in the body, by mass, type I collagen provides the building blocks for tissues such as bone, extra-cellular matrix, tendons, cornea, etc[1-3]. The ability of a single protein to create structures with such various mechanical properties is not fully understood. Before one can engineer and assemble a complex tissue, such as cornea, the mechanisms underlying the formation and assembly, mechanical properties, and structure must be investigated and quantified. The work presented herein contains an extensive study of Type I collagen from the molecular to the tissue level.

The engineering of collagenous tissues that mimic the …

Leibniz's Theodicies, Joseph Michael Anderson

USF Tampa Graduate Theses and Dissertations

Evil poses a particular problem to early modern thinkers. Late scholasticism, while itself variegated, provided a number of resources for dispelling concerns about the justice of God raised by the existence of evil. With much of the metaphysics of the scholastics rejected, the new philosophers needed either to find inventive ways to make the old solutions fit into their new systems, to come up with new resources for dispelling the difficulties, or to accept the difficulties as insurmountable, likely via fideism or atheism. Leibniz, I claim, provides a provocative mixture of the first two approaches.

Many readers think Leibniz's solution …

Two Essays On Individuals, Information, And Asset Prices, Joseph Mohr

USF Tampa Graduate Theses and Dissertations

In the first essay we explore and establish a direct link between investor attention to advertising videos viewed on social media, and trading activity in a firm's securities. We find a positive relation between views of these advertising videos and volume, and a negative relationship between views and bid-ask spread. Returns are positively related to change in views. The positive price pressure is reversed over the following two weeks. The decreases in spread and temporary increase in returns are consistent with increased purchasing by individual investors who view the advertising videos. Our results support the hypothesis that the number of …

Design & Synthesis Of Peptidomimetics Adopting Secondary Structures For Inhibition Of P53/Mdm2 Protein-Protein Interaction And Multiple Myeloma Cell Adhesion, Hyun Joo Kil

USF Tampa Graduate Theses and Dissertations

The protein-protein interactions (PPIs) occur when two or more proteins are bound together. Also, this protein-protein interactions (PPIs) cause the various biological processes in the body. Due to this reason, abilities of controlling or inhibiting PPIs can give us promising advantages like (1) better understanding of biological systems, (2) development of new diagnostic approaches for health or disease, and (3) establishment of novel molecular therapeutics. Many proteins adopt the secondary structures, where most of protein-protein interactions take place. -Helices and -sheets are the prevalent secondary conformations, but there are extended secondary structures such as -hairpins, -turns, 310 helix, and so …

First-Principles Atomistic Simulations Of Energetic Materials, Aaron Christopher Landerville

USF Tampa Graduate Theses and Dissertations

This dissertation is concerned with the understanding of physico-chemical properties of energetic materials (EMs). Recently, a substantial amount of work has been directed towards calculations of equations of state and structural changes upon compression of existing EMs, as well as elucidating the underlying chemistry of initiation in detonating EMs. This work contributes to this effort by 1) predicting equations of state and thermo-physical properties of EMs, 2) predicting new phases of novel EMs, and 3) examining the initial stages of chemistry that result in detonation in EMs. The motivation for the first thrust, is to provide thermodynamic properties as input …

Overwintering And Early Season Amplification Of Eastern Equine Encephalitis Virus In The Southeastern United States, Andrea Bingham

USF Tampa Graduate Theses and Dissertations

Eastern equine encephalitis virus (EEEV) is a highly pathogenic arbovirus that causes severe disease, with a mortality rate of approximately 30-35% in humans and 80-90% in horses. Studies dating back to the 1930's have identified many of the epidemiological and ecological aspects of the virus. However, there are several aspects of EEEV's transmission cycle that remain unclear. In the northeastern states, transmission is seasonal, peaking in the late summer months, while in Florida there is year-round transmission of EEEV. Recent phylogenetic studies have also suggested that Florida may serve as a reservoir for EEEV; the virus may periodically be introduced …