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Continuation In Us Foreign Policy: An Offensive Realist Perspective, Bledar Prifti

USF Tampa Graduate Theses and Dissertations

This dissertation is a study of US foreign policy that aims at maintaining its regional hegemonic status and preventing the emergence of another regional hegemon by implementing the offshore balancing strategy. US intervention during the 2003 Iraq War, strained US-Iran relationship, and the establishment of the Islamic State of Iraq and the Levant (ISIL) in early 2014 compel a reevaluation of US foreign policy. Two major claims of this dissertation include: (1) US foreign policy is consistent with offensive realist theoretical claims; and (2) US foreign policy is characterized by continuity when it comes to issues related to America's strategic …

Operation Optimization And Water Quality Simulation Of Potable Water Distribution System, Xiongfei Xie

USF Tampa Graduate Theses and Dissertations

A potable water distribution system (WDS) consists of pipes, pumps, valves, storage tanks, control and supporting components. Traditionally, it has two basic functions. First, provides end users with potable water at sufficient pressures and good water quality. Second, provides sufficient pressure and flow for fire fighting. Currently, potable water is still the least expensive material for fire fighting. To accomplish these two goals, water utilities have to consider the integrity and security of the water network. As a result, this research selected three research topics that are closely related to the daily operation of water utilities and water quality simulation. …

October 20, 2014 Armstrong Faculty Senate Agenda, Armstrong State University

Armstrong Faculty Senate: Armstrong Faculty Senate Agenda (Archived)

October 20, 2014 Armstrong Faculty Senate Agenda

October 20, 2014 Armstrong Faculty Senate Minutes, Armstrong State University

Armstrong Faculty Senate: Minutes (Archived)

October 20, 2014 Armstrong Faculty Senate Minutes

Great Expectations: The Mismatched Selves Of A Beginning Teacher, Michael Dicicco, Laura Sabella, Robert Jordan, Kate Boney, Pat Jones

The Qualitative Report

As university supervisors we were alerted to heightened emotional responses (i.e., crying, not eating, not sleeping), expressed by paid-interns in an accelerated Master of Arts in Teaching (M.A.T.) cohort of STEM practitioners. While research has shown teachers prepared in alternative programs tend to have greater difficulties (Darling-Hammond, 1990), few studies have examined alternatively prepared teachers’ beliefs and expectations about teaching and learning (Tigchlaar, Brouwer, & Vermut, 2010; Good et al., 2006). This inquiry describes one paid-intern’s teaching expectations during her first year of teaching. In this phenomenological case study, part of a larger cross-case study, we collected data from interviews, …

Suppression Of Optical Damage At 532 Nm In Holmium Doped Congruent Lithium Niobate, Eftihia Barnes, Nathan H. O'Connell, Nicolas R. Balli, Madhab Pokhrel, Anush Movsesyan, Edvard Kokanyan, Dhiraj K. Sardar

Physics & Astronomy Faculty Publications

Optical damage experiments were carried out in a series of Holmium doped congruent lithium niobate (Ho:cLN) crystals as a function of dopant concentration and laser intensity. The light induced beam distortion was recorded with a camera and a detector under the pseudo-Zscan configuration. At 532 nm, strong suppression of the optical damage was observed for the 0.94 mol. % doped crystal. Increased resistance to optical damage was also observed at 488 nm. The suppression of the optical damage is predominantly attributed to the reduction of the Nb antisites due to the holmium doping.

Optimization Of Nanograv's Time Allocation For Maximum Sensitivity To Single Sources, Brian Christy, Ryan Anella, Andrea N. Lommen, Lee Samuel Finn, Richard S. Camuccio, Emma Handzo

Physics & Astronomy Faculty Publications

Pulsar timing arrays (PTAs) are a collection of precisely timed millisecond pulsars (MSPs) that can search for gravitational waves (GWs) in the nanohertz frequency range by observing characteristic signatures in the timing residuals. The sensitivity of a PTA depends on the direction of the propagating GW source, the timing accuracy of the pulsars, and the allocation of the available observing time. The goal of this paper is to determine the optimal time allocation strategy among the MSPs in the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) for a single source of GW under a particular set of assumptions. We …

Gravitational Waves From Individual Supermassive Black Hole Binaries In Circular Orbits: Limits From The North American Nanohertz Observatory For Gravitational Waves, Z. Arzoumanian, A. Brazier, S. Burke-Spolaor, S. J. Chamberlin, S. Chatterjee, J. M. Cordes, P. B. Demorest, X. Deng, Fredrick A. Jenet, Jing Luo

Physics & Astronomy Faculty Publications

We perform a search for continuous gravitational waves from individual supermassive black hole binaries using robust frequentist and Bayesian techniques. We augment standard pulsar timing models with the addition of time-variable dispersion measure and frequency variable pulse shape terms. We apply our techniques to the Five Year Data Release from the North American Nanohertz Observatory for Gravitational Waves. We find that there is no evidence for the presence of a detectable continuous gravitational wave; however, we can use these data to place the most constraining upper limits to date on the strength of such gravitational waves. Using the full 17 …

Near Horizon Geometry Of Strings Ending On Intersecting D8/D4-Branes, J. Estes, D. Krym, B. Van Pol

Publications and Research

We consider solutions of massive IIA supergravity corresponding to the half- BPS intersection of D8/D4-branes with fundamental strings. The 1 + 1-dimensional intersection preserves the symmetry D(2, 1; ; 1) × SO(4). We give a reduction and partial integration of the BPS equations for this symmetry group. We then specialize to the cases of enhanced supersymmetry corresponding to = −1/2,−2 or = 1. In the first case, we show that the only solution with enhanced symmetry is given by the AdS6 geometry describing the near horizon geometry of D8/D4-branes in the presence of an O8-plane. In the second case, we …

Pre-Breakdown Arcing And Electrostatic Discharge In Dielectrics Under High Dc Electric Field Stress, Allen Andersen, Jr Dennison

Presentations

No abstract provided.

Pre-Breakdown Arcing And Electrostatic Discharge In Dielectrics Under High Dc Electric Field Stress, Allen Andersen, Jr Dennison

Conference Proceedings

Highly disordered insulating materials exposed to high electric fields will, over time, degrade and fail, potentially causing catastrophic damage to devices. Step-up electrostatic discharge (ESD) tests were performed for two common polymer dielectrics, low density polyethylene and polyimide. Prebreakdown transient current spikes or pre-arcs were observed, using both slow and high speed detection. These pre-ESD discharge phenomena are explained in terms of breakdown modes and defect generation on a microscopic scale. The field at which pre-breakdown arcing begins was compared to the onset field for electrostatic discharge at which complete breakdown begins to occur for each material. We present evidence …

Charge Transport And Electron Emission Of Disordered Materials: Extensions Of The Walden-Wintle Model For Charge Injection With Electron Beams, Jr Dennison, Alec Sim, Gregory Wilson, Jodie C. Gillespie

Presentations

No abstract provided.

Sedimentology Of The Upper Scotland Formation (Eocene), Barbados, Krishna Mahabir, Nazrul I. Khandaker, Jay P. Persaud, Stanley Schleifer

Publications and Research

Representative samples collected from the Lower Scotland Formation (Eocene) outcropping in northeastern Barbados were investigated in conjunction with overall facies distribution and stratigraphic and sedimentological characteristics to interpret depositional environment and provenance of the fine-grained clastics. The Lower Scotland Formation is, for the most part, a fine-grained clastic-dominated sequence with occasional thin intercalations of gypsum, ironstone, and kaolinite. Distinctive deep-water-facies have been well-documented in dark gray shale units containing load cast, flutes, grooves and prods. In addition, turbiditic brown sandstone with a sharp erosive base and pelagic caps also characterize the base of the formation. Notable marine fauna observed include …

Design And Implementation Of An X-Ray Reflectometer System For Testing Multilayer High Energy X-Ray Optics, Danielle Gurgew

Von Braun Symposium Student Posters

No abstract provided.

Interactive Comment On “Iodine Oxide In The Global Marine Boundary Layer” By C. Prados-Roman Et Al., Marcelo I. Guzman

Chemistry Faculty Publications

No abstract provided.

The Negative Consequences Of Using Free And Reduced Lunch As A Measure Of School-Level Poverty: A Case From The State Of Georgia, Justus Randolph, Rose Prejean-Harris

Georgia Educational Research Association Conference

Poverty has long been known to be strongly correlated with academic achievement. In intercensal years, the National Academy of Sciences recommended using percent of free and reduced lunch (FRL) as a measure of poverty in educational systems. The Federal Government, the State of Georgia, and many other states have adopted the policy of reporting poverty levels at the school level by the percentage of students receiving free or reduced lunch. However, as we will show in this presentation, there is a severe restriction of range in the upper end of the FRL variable. This restriction in range can result in …

Meta-Didactical Slippages In A Ninth Grade Mathematics Classroom: A Paradox Of Teaching, Nathan J. Wisdom

Georgia Educational Research Association Conference

This paper examines (a) the nature of meta-didactical slippages that occurred in a ninth grade predominantly African American mathematics classroom; and (b) how these meta-didactical slippages affect students’ conceptual understanding on a unit of ninth grade mathematics. A qualitative case study that employed ethnographic techniques of data collection and analysis was conducted. The theory of didactical situations in mathematics (Brousseau, 1997) served as the lens that grounded the interpretation of the data. The study found four themes, which illustrated the nature meta-didactical slippages: (a) over-teaching, (b) situational bypass, (c) language and symbolic representation, and (d) the design of didactical situations.

Preservice Teachers’ Impact On Student Learning, Hsiu-Lien Lu, Nancy M. Arrington

Georgia Educational Research Association Conference

The purpose of this study was to systematically investigate preservice teachers’ impact on P-5 student learning. This quantitative study included 1,640 P-5 students taught by 68 preservice teachers in three practicum tiers who responded to our request and submitted P-5 students’ pre- and post- assessment results. A t test was used to examine differences in the normalized gain scores and a set of regression tests to investigate the differences in the student learning outcomes among variables. The results indicate significant difference in P-5 student learning outcomes after the unit instruction by preservice teachers and no difference among variables, which suggests …

End Of The Cosmic Neutrino Energy Spectrum, Luis A. Anchordoqui, V. Barger, H. Goldberg, J.G. Learned, D. Marfatia, S. Pakvasa, T. C. Paul, T. J. Weiler

Publications and Research

There may be a high-energy cutoff of neutrino events in IceCube data. In particular, IceCube does not observe either continuum events above 2PeV, or the Standard Model Glashow-resonance events expected at 6.3PeV. There are also no higher energy neutrino signatures in the ANITA and Auger experiments. This absence of high-energy neutrino events motivates a fundamental restriction on neutrino energies above a few PeV. We postulate a simple scenario to terminate the neutrino spectrum that is Lorentz-invariance violating, but with a limiting neutrino velocity that is always smaller than the speed of light. If the limiting velocity of the neutrino applies …

The Identification Of Variables And Factors Related To Preservice Teacher Candidates’ Passing A State Teacher Certification Examination At An Hbcu, Melanie Frizzell, Noran L. Moffett

Georgia Educational Research Association Conference

This study sought to examine the outcome of teacher education candidates’ performance on a state content exam. Seventeen participants from the class of 2012 were identified for the study of which 12 participants fully participated in the study. This study utilized data collected from the participants through the Teacher Quality Enhancement Subcontract Grant Summer/Fall/Spring 2011-2012 Workshop Series held at the private HBCU. The research design used a QUAN- QUAL-QUAN to triangulate the data through three methods of data collection: GACE early childhood education (ECE) data, GACE ECE survey questionnaire and class of 2012 member interviews. The findings from the survey …

Gifted And At-Risk, Steven Littles, Rose Prejean-Harris Ph.D.

Georgia Educational Research Association Conference

As professionals, teachers are responsible for instructing varied sets of students assembled in dissimilar classrooms. Therefore, differentiated delivery of curricula is needed in order to meet the various needs and abilities of any given population. Although gifted students are thought to be able to hold their own academically, they are in need of these differentiated curricula as well. Access to differentiated curricula provides for maximization of gifted students’ learning potential, while helping to deflect the effects of other issues which surface as a result of being academically gifted.

The purpose of this case study is to explore the social emotional, …

The Imperative Of The School Choice Option Of Nclb: In Whose Interest?, Teri Jones

Georgia Educational Research Association Conference

Since No Child Left Behind (NCLB) became law, educators have faced challenges trying to protect the common good of a public education while, at the same time, developing and/or reviewing proposals to provide for the school choice option of NCLB. In the debate over market-driven education versus traditional public education, many times, the ideologies behind each approach come into direct conflict. Educators and legislators need to be able to identify when privileged interests are at the core of reforms or if the education of each student is the primary interest being served.

This project provides a real life portrait of …

Exploring Philosophy During A Time Of Reform In Mathematics Education, Kimberly White-Fredette

Georgia Educational Research Association Conference

Current reforms in mathematics education, including the implementation of the Common Core State Standards for Mathematics, are rooted in a changing vision of school mathematics, one that includes constructivist learning, student-centered pedagogy, and the use of worthwhile tasks. This changing vision challenges not only teachers’ beliefs about mathematics instruction but their philosophies of mathematics as well. This study investigates the processes that four teachers go through as they implement a new task-based mathematics curriculum while exploring their personal philosophies of mathematics. The participants were part of a graduate-level course that examined, through the writings of various modern philosophers of mathematics …

Cognitive Skills And Mathematics Problem-Solving Performance, Ardyth C. Foster Phd

Georgia Educational Research Association Conference

Geared towards teacher educators and elementary and middle-school mathematics teachers, the findings of a study that explored relationships between students’ cognitive skills and their mathematics problem-solving performance will be presented. The existing complexities within this area, along with the potential implications for collaboration among students and their teachers/peers, and for appropriate and effective pedagogical decision making, will be discussed.

By addressing possible relationships between students’ cognitive skill strengths and skill-based assessment methods, this presentation will provide opportunities for exploring and discussing potential impacts on teaching and assessment methods that are geared towards students’ learning strategies/styles, and that engage students in …

A Case Study Of How Ninth Grade Mathematics Students Construct Knowledge During A Productive Failure Model, Amy F. Westbrook Dr.

Georgia Educational Research Association Conference

The purpose of this qualitative study was to explain how ninth grade mathematics students at a rural high school in Georgia constructed knowledge through student talk when problem solving using Kapur’s (2012) productive failure design. An embedded case study design was used to understand how a group of students constructed knowledge through their use of talk, persistence during the task, and use of prior knowledge while working on a productive failure modeled task. Triangulation resulted from the collected data from multiple sources, which included videotaping, interviewing, and analyzing student artifacts. Utilization of the constructivist perspectives of Vygotsky (1934/1962), Piaget (1971), …

Examining The Flipped Classroom Model Through Literacy And Math Integration: Lessons Learned From A Teacher Quality Professional Development Grant Initiative, Anne Katz Ph.D., Jackie Heeyoung Kim Ed.D.

Georgia Educational Research Association Conference

This presentation will discuss results from a professional development initiative designed to equip primary and elementary grade educators with information and research-based practices to expand teachers’ repertoire of literacy instructional strategies and deepen their math content knowledge through a flipped classroom model. The presentation will define and describe the flipped learning model, briefly note its historical foundations, and address common misconceptions. We discuss learning theories that underlie the model and describe current research findings from our professional development initiative with teachers. We also describe concerns that have emerged as we have worked to develop the flipped learning model. An additional …

Stomatal Physics, Katie Sweet, Keith Mott, David Peak

Browse All Undergraduate research

Stomata, microscopic pores on a leaf’s surface, regulate the diffusion of CO2 from, and the diffusion of water vapor to, the air.

Stomata are responsible for fixing essentially all carbon in the biosphere and generating over 90% of the water vapor in the atmosphere over landmasses.

Exactly how stomata respond to temperature, light intensity, and ambient CO2 and humidity, is still a matter of active debate.

Most research probing this question focuses on identifying and unraveling complicated biochemistry. Recent investigations in our laboratory, however, indicate that much of stomatal behavior can be understood in terms of a simple vapor phase …

Modeling The Energy Dependent Cathodoluminescent Intensity Of A Carbon Composite Material, Justin Christensen, Kelby T. Peterson, Justin Dekany, Jr Dennison

Presentations

When highly disordered insulating materials are subjected to energetic electron bombardment they can emit photons. This process is termed “cathodoluminescence.” This occurs in the space plasma environment and is an important phenomenon to understand when designing any object to be put into space. Light emitted from spacecraft materials can affect optical detection, and can cause stray-light contamination in space-based observatories. The Materials Physics Group at Utah State University uses an ultra-high vacuum chamber equipped with electron guns and a cryostat to control the sample temperature to simulate the space environment and to observe its affects on sample materials. Previous studies …

Discharge Breakdown Analyses, Sam Hansen, Jr Dennison, Allen Andersen

Presentations

Material breakdown due to Electrostatic discharge (ESD) is the primary cause of spacecraft damage due to environment interactions in space. This occurs when the space plasma fluxes charge a craft to high voltages where insulating craft materials then break down. This failure allows current to flow freely through the material, this can damage or destroy onboard electrical systems. My project focuses on the effects of these breakdowns on suspect materials commonly used for electrical insulation in space. The USU Material Physics Group has performed ESD tests on hundreds of samples to date. The ESD damage sites of these samples have …

Lifetimes Of Polymeric Dielectrics: A Dual-Defect Model, Allen Andersen, Jr Dennison

Presentations

Electrostatic discharge (ESD) can cause catastrophic failures in electronic devices. Estimating the lifetime of dielectrics under prolonged high field exposure is a major design concern for applications including spacecraft, high voltage DC power transmission, and semiconductor electronics. Dielectric strengths listed in engineering handbooks are primarily based on cursory measurements with poor repeatability and tend to overestimate ESD fields in real applications. Standard measurements subject test samples to ~500 V/s ramp rates until breakdown. We present the results of ESD studies in two prototypical polymer dielectrics using a ramp rate of ~20 V/4s until breakdown together with tests applying a static …