Digital Commons Network^™

Dynamics Of Plume-Triple Junction Interaction: Results From A Series Of Three-Dimensional Numerical Models And Implications For The Formation Of Oceanic Plateaus, Mladen Dordevic, Jennifer Georgen

OES Faculty Publications

Mantle plumes rising in the vicinity of mid-ocean ridges often generate anomalies in melt production and seafloor depth. This study investigates the dynamical interactions between a mantle plume and a ridge-ridge-ridge triple junction, using a parameter space approach and a suite of steady state, three-dimensional finite element numerical models. The top domain boundary is composed of three diverging plates, with each assigned half-spreading rates with respect to a fixed triple junction point. The bottom boundary is kept at a constant temperature of 1350°C except where a two-dimensional, Gaussian-shaped thermal anomaly simulating a plume is imposed. Models vary plume diameter, plume …

Effects Of Temperature, Irradiance And Pco2 On The Growth And Nitrogen Utilization Of Prorocentrum Donghaiense, Zhangxi Hu, Margaret R. Mulholland, Ning Xu, Shunshan Duan

OES Faculty Publications

Environmental factors such as temp erature, irradiance, and nitrogen (N) supply affect the growth of Prorocentrum donghaiense, but the interactive effects of these physical factors and the effects of atmospheric CO₂ (pCO₂) on growth and N uptake have not been examined. We compared growth kinetics of P. donghaiense grown on 4 different N substrates (nitrate [NO₃ -], ammonium [NH₄ +], urea, and glutamic acid [glu]) with respect to temperature, irradiance, and pCO₂. Temperature (15 to 30°C) had a positive effect on growth (max. growth rates: 0.17 to 0.65 d …

A Conspiracy To Resurrect Life And Social Justice In Science Curriculum With Henrietta Lacks: A Play, Dana Compton Mccullough

College of Graduate Studies: Theses & Dissertations

This dissertation is a theoretical inquiry into alternative pedagogies that challenge current standardized practices in the field of science education. Building upon a wide array of work, such as philosophy and history of science (Haraway, 1989, 1991,1997, 2000, 2007; Harding 1991, 1998; Latour, 1987, 1991/1993, 1991; Rheinberger, 1992, 2010; Serres, 1982/2007,1991/1997, 2010/2012), curriculum studies and science curriculum (Appelbaum, 2001, 2010; Barone, 1990, 2000; Blades, 1997, 2001; Calabrese-Barton, 2003, 2011; Cartwright, 1999; Doll, 1993; Grumet, 1999; He, 2003,2008, 2009,2013; Lather, 1997,2007,2010; Schubert, 1986, 2009; Schwab, 1978; Weaver, 2001, 2004, 2010, 2015); and playwriting (Brody, 2011; Innes, 2002; and Mighton, 1987, 1988), …

Design, Analysis And Evaluation Of Unmanned Aerial Vehicle Ad Hoc Network For Emergency Response Communications, Robin D. Grodi

College of Graduate Studies: Theses & Dissertations

In any emergency situation, it is paramount that communication be established between those affected by an emergency and the emergency responders. This communication is typically initiated by contacting an emergency service number such as 9-1-1 which will then notify the appropriate responders. The communication link relies heavily on the use of the public telephone network. If an emergency situation causes damage to, or otherwise interrupts, the public telephone network then those affected by the emergency are unable to call for help or warn others. A backup emergency response communication system is required to restore communication in areas where the public …

A Study Of Black Teachers’ Perceptions Of The Academic Achievement Of Black Male Students In Elementary Schools In Rural Georgia, Marshall F. Aker

College of Graduate Studies: Theses & Dissertations

Presently, numerous research studies, articles and reports have shown troubling outcomes regarding the education of Black male students in the United States (Darensbourg, Perez, & Blake, 2010; Lewis, Simon, Uzzell, Horwitz, & Casserly, 2010; Prager, 2011). The performance of Black males on national achievement assessments is lower in comparison to the performance of most other subgroups. The high school graduation rate for Black males in the United States is below most other ethnic subgroups (Schotts Foundation, 2015). Although various strategies are often implemented at the national, state, and local level in attempts to address achievement disparities, these efforts have not …

Blow-Up Solution And Blow-Up Rate Of Bose-Einstein Condensates With Rotational Term, Nyla Basharat

College of Graduate Studies: Theses & Dissertations

In this thesis, we discuss the Gross Pitaevskii Equation (GPE) with harmonic potential and with an angular momentum rotational term in space R^{^2}, which describes the model for Bose-Einstein Condensation. Local Well-Posedness of the equation and the conservation identities for mass, energy and angular momentum are presented. Using the virial identities, we derive the condition for blow-up solution in finite time. Then a threshold of L^{^2} norm of wave function is obtained for global existence, of GPE in term of ground state solution. This method allows us to obtain our main result ``Sharp sufficient condition for global …

Design, Analysis, Implementation And Evaluation Of Real-Time Opportunistic Spectrum Access In Cloud-Based Cognitive Radio Networks, Nimish Sharma

College of Graduate Studies: Theses & Dissertations

Opportunistic spectrum access in cognitive radio network is proposed for remediation of spectrum under-utilization caused by exclusive licensing for service providers that are intermittently utilizing spectrum at any given geolocation and time. The unlicensed secondary users (SUs) rely on opportunistic spectrum access to maximize spectrum utilization by sensing/identifying the idle bands without causing harmful interference to licensed primary users (PUs). In this thesis, Real-time Opportunistic Spectrum Access in Cloud-based Cognitive Radio Networks (ROAR) architecture is presented where cloud computing is used for processing and storage of idle channels. Software-defined radios (SDRs) are used as SUs and PUs that identify, report, …

A Partition Function Connected With The Göllnitz-Gordon Identities, Nicolas A. Smoot

College of Graduate Studies: Theses & Dissertations

Nearly a century ago, the mathematicians Hardy and Ramanujan established their celebrated circle method to give a remarkable asymptotic expression for the unrestricted partition function. Following later improvements by Rademacher, the method was utilized by Niven, Lehner, Iseki, and others to develop rapidly convergent series representations of various restricted partition functions. Following in this tradition, we use the circle method to develop formulas for counting the restricted classes of partitions that arise in the Gollnitz-Gordon identities. We then show that our results are strongly supported by numerical tests. As a side note, we also derive and compare the asymptotic behavior …

Assessment Of Optimized Electrode Configuration In Electrical Impedance Myography Study Using Genetic Algorithm Via Finite Element Model, Somen Baidya

College of Graduate Studies: Theses & Dissertations

Electrical Impedance Myography (EIM) is a neurophysiologic technique in which high- frequency, low-intensity electrical current is applied via surface electrodes over a muscle or muscle group of interest and the resulting electrical parameters (resistance, reactance and phase) are analyzed to isolate diseased muscles from healthy ones. Beside muscle properties, some other anatomic and non-anatomic factors like muscle shape, subcutaneous fat (SF) thickness, inter-electrode distance, etc. also impact the major EIM parameters and thus affect the EIM analysis outcomes. The purpose of this study is to explore the effects of variation in some of these factors impose on EIM parameters and …

Improving The Inference Of Some Experiemtal Studies By Using Ranked Auxiliary Covariates, Rajai Jabrah

College of Graduate Studies: Theses & Dissertations

In many studies, the measurement of sampling units according to the response variable is costly or time consuming, however, it is possible to rank sampling units according to baseline auxiliary covariates, which are available, easily obtainable, and cost efficient. In these cases, when estimating the population mean, Ranked Set Sampling (RSS) can be a more efficient sampling method than the Simple Random Sampling (SRS) method. In this dissertation, we propose a modified approach of the RSS method to allocate units into an experimental study, aimed to compare two or more groups.

Ranked auxiliary covariates, which are typically correlated with the …

Experimental And Numerical Investigation Of Aerodynamic Performance For Vertical-Axis Wind Turbine Models With Various Blade Designs, Travis E. Salyers

College of Graduate Studies: Theses & Dissertations

The demand for wind energy as a renewable source is rising substantially. A growing interest exists in utilizing potential energy conversion applications in areas with less powerful and less consistent wind conditions. In these areas, vertical-axis wind turbines (VAWTs) possess several advantages over the conventional horizontal-axis type. Savonius turbines are drag-based rotors which operate due to a pressure difference between the advancing and retreating blades. These turbines are simpler in design, less expensive to install, non-dependent of wind direction, and more efficient in lower wind speeds. In the present study, six different rotor designs with equal swept areas are analyzed …

Discrepancy Analysis Between Close-Range Photogrammetry And Terrestrial Lidar, Sam R. Newsome Jr

College of Graduate Studies: Theses & Dissertations

This study presents a comparison of building measurements performed on 3D models generated by two different approaches. In one approach, the models were produced via close-range photogrammetry. Such models are based on still-frame photographs that are, post-processed with commercially available photogrammetric software. In the second approach, 3D point-cloud models were generated via laser scanning. For this purpose, three case studies were conducted. The first was a simple one story structure, the second was a multi-story Maya ruin, and the third was an earth filled terrace. Several benchmarks within a closed traverse were established to serve as standard georeference points for …

Gorenstein Projective (Pre)Covers, Michael J. Fox

College of Graduate Studies: Theses & Dissertations

The existence of the Gorenstein projective precovers is one of the main open problems in Gorenstein Homological algebra. We give sufficient conditions in order for the class of Gorenstein projective complexes to be special precovering in the category of complexes of R-modules Ch(R). More precisely, we prove that if every complex in Ch(R) has a special Gorenstein flat cover, every Gorenstein projective complex is Gorenstein flat, and every Gorenstein flat complex has finite Goenstein projective dimension, then the class of Gorenstein projective complexes, GP(C), is special precovering in Ch(R).

Geometric-Based Algorithm For A Full Row-Rank System Matrix Along Multiple Directions In Dt, Igor Lutsenko

College of Graduate Studies: Theses & Dissertations

Discrete tomography (DT) is an image reconstruction procedure that deals with computational synthesis of a cross-sectional image of an object from either transmission or reflection data collected by penetrating an object with X-rays from a small number of different directions, and whose range of the underlying function is discrete. Image reconstruction using algebraic approach is time consuming and the computation cost depends on the size of the system matrix. More scanning directions provide an increase in the reconstructed image quality, however they increase the size of the system matrix dramatically. Deletion of linearly dependent rows of this matrix is necessary …

Remedial Education Programs And Student Success: Perceptions Of Faculty And Administrators At Hbcus, Tenora J. Simonez

College of Graduate Studies: Theses & Dissertations

ABSTRACT

The purpose of this study was to examine factors that contributed to student success in remedial education as perceived by faculty members and administrators at one public HBCU in the University System of Georgia. The five specific areas that contributed to student success and were identified for review were administrative factors, curricula and instructional models, academic support services, importance of placement tests, and the impact of financial issues. Each of these areas was represented in literature regarding the histories of remedial education programs and HBCUs, recent federal and state admissions and fiscal changes, and instructional best practices of remedial …

A Qualitative Examination Of The Needs Of Mothers In College In The Rural Southeast, Danielle N. Bostick

College of Graduate Studies: Theses & Dissertations

The purpose of my study was to understand student mothers that attended college in the rural southeast by using an ecological framework to examine the barriers and challenges that they encounter on college campuses. Additionally, the study identified support and the lack of support that the mothers received. The theoretical concepts of intensive mothering, role strain, and role conflict were also used to comprehend how parental obligations can conflict with the expectations of being a college student. In total, 14 participants that attended a mid-size university in the rural southeast agreed to be a part of the study. The criteria …

Assessing Shoreline Change And Vegetation Cover Adjacent To Back-Barrier Shoreline Stabilization Structures In Georgia Estuaries, Katherine R. Wakefield

College of Graduate Studies: Theses & Dissertations

Anthropogenic stabilization of erosional shorelines by hard-armoring structures is used for protection of property, especially if buildings, historical monuments, cultural resources, or other infrastructure are present. The post-installation effects of shoreline stabilization structures on adjacent shorelines in the back-barrier marshes of coastal Georgia are a concern, and interest in living shorelines as erosion control devices has increased because of their use of natural materials and vegetation. AMBUR shoreline analysis software was used to calculate pre-and post-installation shoreline change rates of shorelines adjacent to riprap and bulkhead structures. There was no significant difference between the post-installation shoreline change rates of the …

The Effects Of Thermal Opportunity And Habitat On Physiological Performance In Ecologically Distinct Populations Of The Florida Scrub Lizard Sceloporus Woodi, Lauren K. Neel

College of Graduate Studies: Theses & Dissertations

An ectotherm’s ability to thermoregulate affects many physiological traits. Therefore, thermal factors are paramount when considering behavior, activity time, body temperatures, energy budget, and performance capabilities. The Florida scrub lizard (Sceloporus woodi) is a ground-dwelling lizard that occupies longleaf pine and sand pine scrub habitats in the Ocala National Forest. Here, this species’ habitat is maintained by either clear-cut logging in scrub stands, or prescribed burning in long leaf pine stands. These habitat types differ in their dominant vegetation, canopy cover, and availability of vertical perches and thus are ecologically different. I used biophysical models to measure the …

“At-Risk” Rural Middle-School Students’ Perceptions Of Problem-Based Learning In Mathematics, Deborah A. Bowers

College of Graduate Studies: Theses & Dissertations

Middle-grade students who fail math have at least a three-in-four chance of dropping out of high school (Neild & Balfanz, 2006). Furthermore, these students, especially female students, at risk of failure in mathematics and consequent dropout, may not be well served by traditional teaching methods because of their inequitable instructional practices (Lerner & Sadker, 1999). This case study of eight seventh-grade students from a rural school in Georgia sought to gain insight into whether PBL (problem-based learning) was perceived to be an effective teaching method for “at-risk” middle-school mathematics students and female students in particular. The goals of the study …

Creating Spaces Of Imaginative Engagement For Gifted High School Honors And Advanced Placement English Students, Patty T. Bradshaw

College of Graduate Studies: Theses & Dissertations

Gifted students may have safety needs beyond the universal needs for security that all students have in order to learn. I investigated the needs of gifted students first hand through interviews with nine gifted students with diverse backgrounds. Interview questions and findings were organized around five major themes: characterization of self, characterization of classmates, characterization of teachers, characterization of classroom, and characterization of strategies and activities. Conclusions show that gifted students share commonalities in personality, needs, and characteristics as well as commonalities among the challenges they face, conditions in which they learn, and the environment in which they feel safe …

2016 Georgia Southern University Softball Media Guide, Georgia Southern University

Women's Softball Records

• Georgia Southern Softball 2016 Media Guide

2016 Georgia Southern University Men's Soccer Media Guide, Georgia Southern University

Men's Soccer Records

• 2016 Media Guide & Record Book Georgia Southern Men's Soccer

Horyzonty Współczesnego Zarządzania, Marcin Żemigała

Monografie/Monographs

Książka, opracowana z okazji jubileuszu 70-lecia Pana Prof. Jerzego Bogdanienki. Zgodnie

z jego szerokimi zainteresowaniami badawczymi zatytułowano ją „Horyzonty

współczesnego zarządzania”. Trzydziestu jeden Autorów zechciało podarować

nam swe teksty, które próbują zarysować właśnie owe horyzonty.

Semi-Automatic Identification Of Synonyms In Structured Knowledge Representations, Thomas C. Taylor

Theses

Synonym support is an important aspect of querying knowledge bases, but current approaches to generating such support is difficult and error-prone. Automating the process of identifying synonyms in structured knowledge representations is therefore an important pursuit. This thesis presents an ensemble approach that incorporates several methods and knowledge sources heretofore used individually. A case study shows that the approach performs better than individual methods, and that it may be used to reduce efforts to identify synonyms.

The Study Of Cybersecurity Algorithms From Traditional Computing To The Internet Of Things, Daniel Davis

Theses

A progressive approach to teach students how to develop and deploy cybersecurity algorithms across a wide range of heterogeneous computing devices is proposed. Data confidentiality and data integrity can be ensured when sensitive information is transferred between various types of devices over insecure communication channels by using cybersecurity algorithms. A step-by-step procedure to teach students cybersecurity algorithms on devices ranging from personal computers to devices deployed in the Internet of Things ecosystem is needed. We develop four learning modules that offer students the opportunity to explore commonly utilized cybersecurity algorithms across several heterogeneous devices. Students are able to utilize our …

Second Order Sliding Mode Control Using Nonlinear Dynamic Sliding Manifold : A Lyapunov Approach, Bhargav Chava

Theses

Second order Sliding Mode Control (2-SMC) algorithms require knowledge of derivative of sliding variable, which is to be implemented using 2-SM differentiators. The use of 2-Sliding Mode differentiators causes loss of accuracy. Hence, the approach known as nonlinear dynamic sliding manifold (NDSM) approach is used to design a 2-SM control algorithm without the knowledge of derivative of sliding variable. The main contribution of the thesis is proof of finite time convergence of 2-SMC using NDSM approach by Lyapunov function technique. Also an adaptive 2-SM control law is proposed for perturbed systems with unknown boundaries using NDSM approach to avoid overestimation …

Philosophizing About God And Nature : Connections And Divisions In The Writings Of Isaac Newton, Joshua Riddle

Theses

For several decades, scholars have argued about the relationship between Isaac Newton’s works in science (or natural philosophy), “chymistry,” religion, and theology. Of particular interest has been how his natural philosophy and religion/theology related to each other. Some scholars claim a significant connection between them, even claiming they are part of a “seamless unity” in Newton’s thinking. Other, more skeptical, scholars call for a localized approach to his writings. By entering into this debate and analyzing many of Newton’s manuscripts, I argue that Newton held onto significant disciplinary distinctions in his writings, but also was willing to make small connections …

Heat Deposition During Turbulence Distorted Laser Irradiation, William Vaden Dent Iii

Theses

Realistically modeled heat deposition by a laser source under a variety of turbulent conditions generated from the classic Kolmogorov model is presented. Predicted heat deposition data is created from solutions to the differential heat flow equation and for representative example turbulence distorted waveforms.

Ogeechee Riverkeeper Oral Histories, Zach S. Henderson Library Special Collections

Finding Aids

This collection consists of oral history interviews of people who grew up living on the Ogeechee River and its watershed. The interviews were conducted from 2016-2017 for Phase I of the Ogeechee Project, but the topics span a broad range of time - including family lore and artifacts from Native American settlement and the Colonial Period through today. Materials include photographs and written documents with audio recordings making the bulk of the collection. Materials were originally collected by c.a.s.e. Consulting Services for the Ogeechee Riverkeeper organization.

Find this collection in the University Libraries' catalog.

2016-2017 Senate, Senate Committee, And University Committee Membershiip,, Georgia Southern University

Faculty Senate: Membership Lists

No abstract provided.