Digital Commons Network^™

Mynews, Georgia Southern University

My News (2014-2020)

• Pops for Pups Noon 4/2

• Legal Affairs Boot Camp 2019 - Armstrong Campus 1:30 p.m. 4/2

• Meet and Greet Reception with Dr. Kyle Marrero - Statesboro 2:30 p.m. 4/2

• Baseball vs Presbyterian College 6 p.m. 4/2

• Grayson Stadium Fan Bus Trip 3:45 p.m. 4/3

• Baseball vs College of Charleston 6 p.m. 4/3

• Meet and Greet Reception with Dr. Kyle Marrero - Armstrong Campus 2:30 p.m. 4/4

• International Conversation Hour 11:30 a.m. 4/5

• Spring Plant Sale 9 a.m. 4/6

• Track and Field - Georgia Southern Spring Classic 9 a.m. 4/6

• Men's Tennis vs Appalachian State 1 p.m. 4/6

• No Impact Week …

  ---

  Go to article

2019 April - Tennessee Monthly Climate Report, Tennessee Climate Office, East Tennessee State University

Tennessee Climate Office Monthly Reports

No abstract provided.

Pay-For-Play In College Athletics: A Phenomenological Study Of Former And Current College Student-Athletes’ Perception Of Pay-For-Play, Brittany Dobson

Masters Theses

The literature suggests the conceptual definition of amateurism set by the National Collegiate Athletic Association (NCAA) and the increase in corporate athleticism within the NCAA has resulted in a controversial debate concerning the pay-for-play model, which would allow student-athletes to receive additional compensation. Numerous studies related to pay-for-play have been implemented, however, few have examined how student-athletes feel about the pay-for-play model. The purpose of this study will be to explore student-athletes’ perceptions of pay-for-play. In order to understand student-athletes’ perceptions of pay-for-play, a phenomenological research design was chosen. Three former and two current NCAA Division I student-athletes from Liberty …

Advancing Film Through Art & Design: A Study Of The Influence That Film And Fine Art Have On The Independent Film Market, Jamall Rashaud Mcmillan

Masters Theses

The Influence of Graphic Design and Fine Art in Film is a exploration into the impact that an investment of the arts has on film and more specifically the independent film market. Most independent filmmakers have to develop their productions with little to no budget. In doing so they must work to create a marketable film to the best of their ability. There in-lies the issue; they are doing it to the best of “their” ability. The issue that is in focus with the notion of ability is that a major component that is left out of the equation to …

Barbri Bar Review Course, Benjamin N. Cardozo School Of Law

2018–2019 Flyers

No abstract provided.

Investigation Of Multiple Torch Paw-Based Additive Manufacturing, Nathan Huft

Graduate Theses & Non-Theses

PAW Print 3D (PP3D), a wire and arc additive manufacturing (AM) system was developed. PP3D comprises three plasma arc welding torches arranged radially around a central wire feed. Using three torches was hypothesized to eliminate sensitivity to travel direction. Two deposition modes were developed – continuous, which deposited continuous beads, and dabber, which deposited discreet “dabs” of material. Dabber was hypothesized to provide favorable solidification conditions that would refine the as-deposited grain structure. Three sets of process parameters for each deposition mode were developed. Ineffective workpiece melting was observed and investigated during process development. Using COMSOL Multiphysics software and experimental …

Modeling Sequential And Basket-Oriented Associations For Top-K Recommendation, Duc-Trong Le Duc Trong

Dissertations and Theses Collection (Open Access)

Top-K recommendation is a typical task in Recommender Systems. In traditional approaches, it mainly relies on the modeling of user-item associations, which emphasizes the user-specific factor or personalization. Here, we investigate another direction that models item-item associations, especially with the notions of sequence-aware and basket-level adoptions . Sequences are created by sorting item adoptions chronologically. The associations between items along sequences, referred to as “sequential associations”, indicate the influence of the preceding adoptions on the following adoptions. Considering a basket of items consumed at the same time step (e.g., a session, a day), “basket-oriented associations” imply correlative dependencies among these …

Flexible Moral Behavior In The Workplace, Kraivin Chintakananda

Dissertations and Theses Collection (Open Access)

In my dissertation, I systematically examine what it means to be morally flexible. I develop a scale to capture an individual’s willingness to adapt their moral behavior and examine both positive and negative consequences of this type of moral flexibility in the workplace. My dissertation consists of three studies. In Chapter 2, I draw from the personality strength literature and research on within-person variability in moral behavior to introduce the construct of moral adaptability (MA) defined as the willing to adjust moral behavior depending on the situation. I argue MA functions in a similar manner to personality strength (but in …

Low-Latency Gravitational-Wave Alerts For Multimessenger Astronomy During The Second Advanced Ligo And Virgo Observing Run, B. P. Abbott, R. Abbott, T. D. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.

Physics Faculty Research & Creative Works

Advanced LIGO's second observing run (O2), conducted from 2016 November 30 to 2017 August 25, combined with Advanced Virgo's first observations in 2017 August, witnessed the birth of gravitational-wave multimessenger astronomy. The first ever gravitational-wave detection from the coalescence of two neutron stars, GW170817, and its gamma-ray counterpart, GRB 170817A, led to an electromagnetic follow-up of the event at an unprecedented scale. Several teams from across the world searched for EM/neutrino counterparts to GW170817, paving the way for the discovery of optical, X-ray, and radio counterparts. In this article, we describe the online identification of gravitational-wave transients and the distribution …

Geometric Effects Of Open Hollow Hydroxyapatite Microspheres Influence Bone Repair And Regeneration In Sprague Dawley Rats, Youqu Shen, M. N. Rahaman, Yongxian Liu, Yue-Wern Huang

Materials Science and Engineering Faculty Research & Creative Works

Effective regeneration of bone defects caused by trauma or chronic diseases is a significant clinical challenge. Bone deficiency is overcome using treatments that rely on bone regeneration and augmentation. While various treatments have been investigated with encouraging results, complete and predictable bone reconstruction is often difficult [1]. Synthetic bone grafts have advantages such as consistent quality, safety, and good tissue tolerance. They usually function as inert or osteoconductive implants. Encouraging results from synthetic grafts have been reported. For instance, hollow hydroxyapatite (HA) microspheres showed the ability to facilitate bone repair in rats with non-healing calvarial defects [2,3]. However, new bone …

Characterization Of Mgal₂O₄ Sintered Ceramics, Nina Obradovic, William Fahrenholtz, Suzana Filipovic, Cole Corlett, Pavle Dordevic, Jelena Rogan, Predrag J. Vulic, Vladimir Buljak, Vladimir Pavlovic

Materials Science and Engineering Faculty Research & Creative Works

Single phase MgAl₂O₄ was made from a one-to-one molar ratio of MgO and Al₂O₃ powders mixed using ball-milling. Mixtures of MgO and Al₂O₃ were subsequently treated in planetary ball mill for 30, 60, 90 and 120 minutes in air. The aim of this study was to examine phase composition, microstructure, and densification behavior of sintered specimens. After sintering in dilatometer at 1500 °C, the powder was converted to single phase MgAl₂O₄. The results show that mechanical activation improved the densification behavior of MgAl₂O₄ sintered …

Genetic Structure Of The Painted Bunting And Its Implications For Conservation Of Migratory Populations, Andrea Contina, Jose L. Alcantara, Eli S. Bridge, Jeremy D. Ross, William F. Oakley, Jeffrey F. Kelly, Kristen Ruegg

School of Integrative Biological & Chemical Sciences Faculty Publications

The Painted Bunting Passerina ciris is a Neotropical songbird which breeds primarily in the USA during the summer and migrates to Mexico, Central America, southern Florida and the Caribbean over the winter. Male Painted Buntings are brightly coloured, which makes them highly sought after as pets, particularly in Mexico, Central America and Europe. We used short sequence repeats (microsatellite DNA) to investigate the population genetic structure of the Painted Bunting and its implications in conservation management of migratory populations. We found a detectable level of population differentiation as revealed by pairwise FST and RST comparisons and Bayesian clustering …

High-Resolution Investigation Of Event Driven Sedimentation: Response And Evolution Of The Deepwater Horizon Blowout In The Sedimentary System, Rebekka A. Larson

USF Tampa Graduate Theses and Dissertations

This Dissertation combines the investigation of the sedimentological impacts of the Deepwater Horizon (DwH) blowout event in the deep-sea benthos, with the refinement and advancement of methods and approaches for high-resolution investigations of events preserved in sedimentary records. An approach that combined, rapid collection of cores, a continued annual time series collection of cores, and high-resolution sampling and analyses, in particular short-lived Radioisotopes (SLRad), enabled the temporal resolution required to detect the sedimentary response to the short-duration DwH event, and evaluate post-event sedimentation patterns at a comparable time scale (months).

The collection of 179 sediment cores from 80 sites between …

Exploring Variations In Diet And Migration From Late Antiquity To The Early Medieval Period In The Veneto, Italy: A Biochemical Analysis, Ashley B. Maxwell

USF Tampa Graduate Theses and Dissertations

This project tests the hypothesis that the Langobard migration into the Roman/Byzantine Veneto (northeastern Italy) resulted in significant dietary changes from Late Antiquity (4-5th centuries AD) to the Early Medieval period (6-8th centuries AD). At the end of the Great Germanic Migrations in AD 568, Langobards from Pannonia entered and occupied two-thirds of the Italian peninsula. It is unclear how large these migrations were, as historical documents exaggerate mass movements; however, conservative estimates suggest they made up 8% of the areas they occupied. The degree to which the Langobards influenced economic change and subsistence in this area is poorly understood. …

Robustly Optimal Reserve Price, Wei He, Jiangtao Li

Research Collection School Of Economics

We study a robust version of the single-unit auction problem. The auctioneer has confidence in her estimate of the marginal distribution of a generic bidder's valuation, but does not have reliable information about the joint distribution. In this setting, we analyze the performance of second-price auctions with reserve prices in terms of revenue guarantee, that is, the greatest lower bound of revenue across all joint distributions that are consistent with the marginals. For any finite number of bidders, we solve for the robustly optimal reserve price that generates the highest revenue guarantee. Our analysis has interesting implications in large markets. …

Random Coefficient Continuous Systems: Testing For Extreme Sample Path Behavior, Yubo Tao, Peter C. B. Phillips, Jun Yu

Research Collection School Of Economics

This paper studies a continuous time dynamic system with a random persistence parameter. The exact discrete time representation is obtained and related to several discrete time random coefficient models currently in the literature. The model distinguishes various forms of unstable and explosive behavior according to specific regions of the parameter space that open up the potential for testing these forms of extreme behavior. A two-stage approach that employs realized volatility is proposed for the continuous system estimation, asymptotic theory is developed, and test statistics to identify the different forms of extreme sample path behavior are proposed. Simulations show that the …

Rank Tests At Jump Events, Jia Li, Viktor Todorov, George Tauchen, Huidi. Lin

Research Collection School Of Economics

We propose a test for the rank of a cross-section of processes at a set of jump events. The jump events are either specific known times or are random and associated with jumps of some process. The test is formed from discretely sampled data on a fixed time interval with asymptotically shrinking mesh. In the first step, we form nonparametric estimates of the jump events via thresholding techniques. We then compute the eigenvalues of the outer product of the cross-section of increments at the identified jump events. The test for rank r is based on the asymptotic behavior of the …

M-Estimators Of U-Processes With A Change-Point Due To A Covariate Threshold, Lili Tan, Yichong Zhang

Research Collection School Of Economics

Economic theory often predicts a “tipping point” effect due to multiple equilibria. Linear threshold regressions estimate the “tipping point” by assuming at the same time that the response variable is linear in an index of covariates. However, economic theory rarely imposes a specific functional form, but rather predicts a monotonic relationship between the response variable and the index. We propose new, rank-based, estimators for both the “tipping point” and other regression coefficients, exploiting only the monotonicity condition. We derive the asymptotic properties of these estimators by establishing a more general result for M-estimators of U-processes with a change-point due to …

Sieve Estimation Of Time-Varying Panel Data Models With Latent Structures, Liangjun Su, Xia Wang, Sainan Jin

Research Collection School Of Economics

We propose a heterogeneous time-varying panel data model with a latent group structure that allows the coefficients to vary over both individuals and time. We assume that the coefficients change smoothly over time and form different unobserved groups. When treated as smooth functions of time, the individual functional coefficients are heterogeneous across groups but homogeneous within a group. We propose a penalized-sieve-estimation-based classifier-Lasso (C-Lasso) procedure to identify the individuals’ membership and to estimate the group-specific functional coefficients in a single step. The classification exhibits the desirable property of uniform consistency. The C-Lasso estimators and their post-Lasso versions achieve the oracle …

Illusion Of Gender Parity In Education: Intrahousehold Resource Allocation In Bangladesh, Sijia Xu, Abu S. Shonchoy, Tomoki Fujii

Research Collection School Of Economics

A target in the Millennium Development Goals—gender parity in all levels of education—is widely considered to have been attained. However, measuring gender parity only through school enrollment is misleading, as girls may lag behind boys in other educational measures. We investigate this with four rounds of surveys from Bangladesh by decomposing households’ education decisions into enrollment, education expenditure, and share of the education expenditure allocated for the quality of education like private tutoring. We find a strong profemale bias in school enrollment but promale bias in the other two decisions. This contradirectional gender bias is unique to Bangladesh and partly …

Building An Equitable And Inclusive City Through Housing Policies: Singapore’S Experience, Sock Yong Phang

Research Collection School Of Economics

Inequality is an age-old concern. In recent years, the rise of income inequality has received worldwide media and policy attention, beginning with the Occupy movement of 2011-2012 and a wave of notable scholastic books such as Stiglitz (2012), Piketty (2014), and Atkinson (2015). Piketty’s Capital in the 21st Century, an unlikely bestseller, contained a vast amount of data showing that the rich are taking rising shares of income and wealth in the advanced economies. Piketty’s approach towards capital and wealth is an aggregative one, and he does not treat real estate or land as a different or distinct form of …

Detection And Characterization Of Actuator Attacks Using Kalman Filter Estimation, Yuqin Weng

Master's Theses (2009 -)

In this thesis, two discrete-time control systems subject to noise, are modeled, analyzed and estimated. These systems are then subjected to attack by false signals such as constant and ramp signals. In order to find out how and when the control systems are being attacked by the false signals, several detection algorithms are applied to the systems. This work focuses on actuator attack detection. To detect the presence of false actuator signals, a bank of Kalman filters is set up which uses adaptive estimation and conditional probability density functions for detecting the false signals. The individual Kalman filters are each …

The Relationship Between Identity Dimensions, Gender Conformity, And Satisfaction With Life, Alexandria Colburn

Master's Theses (2009 -)

There is a large body of evidence indicating physical and mental health disparities among marginalized populations. The purpose of this study was to examine the relationship between identity dimensions, gender conformity, and well-being. I anticipated that identification with a marginalized identity group would predict poorer satisfaction with life, compared to identification with a privileged group. In addition, I investigated the role of gender conformity as a possible interaction variable in the relationship between identity factors (assigned sex, age, race, ethnicity, and sexual orientation) and outcomes of satisfaction with life. A hierarchical multiple regression was used to investigate these hypotheses. Results …

The Design And Physical Properties Of An Optimized Chitosan Hydrogel For Potential Use In Endodontics, Hunter Housley

Master's Theses (2009 -)

Introduction: The aim of this study was to synthesize an optimized chitosan/carbon dot hydrogel and measure its effects on the proliferation of dental pulp stem cells. Methods: 1.5% w/v chitosan hydrogel samples were fabricated with 300 mg/ml aqueous β-glycerol phosphate (β-GP) to create an optimized chitosan with a gelation onset temperature below 37°C. Spermidine-functionalized carbon dots (CDs) were added to test groups in concentrations of 25 µg/ml and 50 µg/ml. Complex shear viscosity of the prepared hydrogel samples was evaluated with a Kinexus pro+ shear rheometer (Malvern Panalytical). Samples were evaluated for cellular proliferation with dental pulp stem cells at …

Shock Compaction Of Graphene Doped Yttria Stabilized Zirconia: An Experimental And Computational Study, Christopher Rueben Johnson

Master's Theses (2009 -)

Yttria stabilized zirconia (YSZ) is a broadly used ceramic due to its impeccable hardness and thermal stability. Limitations of the material, however, subsist within its fracture toughness. Literature indicates that shock consolidation may enable production of composite YSZ and graphene mixtures with improved fracture toughness and other material properties while maintaining the material’s nanostructure dimensionality. Therefore, investigation of the compaction phenomena at non-equilibrium states will provide informative results to be used in the fabrication of bulk graphene-YSZ composites. Computational molecular dynamics (MD) simulations and impact experiments are conducted to explore and characterize the dynamic response of the YSZ variants. Molecular …

The Influence Of Full Coverage Restorations On Pulp Vitality: A Ten-Year Retrospective Study, Abby Yavorek

Master's Theses (2009 -)

INTRODUCTION: The incidence of pulpal disease after delivery of a full-coverage crown has been previously described as between 2-19%. The objective of this study was to identify and analyze the factors that contribute to the incidence of NS-RCT after the delivery of single-unit full-coverage restorations. MATERIALS AND METHODS: Insurance claims from 88,409 crown placements in the Delta Dental of Wisconsin Insurance database were analyzed from the years 2008 to 2017. The Cox Regression model was used to analyze the effect of the predictor variables on the survival of the tooth. Untoward events were defined as NS-RCT, tooth extraction, retreatment of …

Injectable Gels With Potential Use In Endodontics, Maksim Montatskiy

Master's Theses (2009 -)

Objective: To formulate a thermoreversible hydrogel using methyl-cellulose, carbon dots and inorganic salts to achieve physiologically compatible gelation temperature; to test cytotoxic effects of formulation against dental pulp stem cells.Materials/Methods: A 5% w/v methylcellulose (MC) solution was prepared and equal volumes of NaCl aqueous solution were added to make various sodium chloride salt concentrations and reach the final MC concentration of 2.5%. Samples were analyzed using a shear rheometer to monitor complex shear viscosity as a function of temperature to arrive at onset gelation temperature closest to targeted temperature. Carbon dots were synthesized by thermal method using ammonium citrate …

Development Of A Quasi-Monte Carlo Method For Thermal Radiation, Joseph Farmer

Master's Theses (2009 -)

Radiative heat transfer in participating media is among the most challenging computational engineering problems due to the complex nonlinear, nonlocal nature of radiation transport. Many approximate methods have been developed in order to resolve radiative heat transfer in participating media; but approximate methods, by the nature of their approximations, suffer from various shortcomings both in terms of accuracy and robustness. The only methods that can resolve radiative transfer accurately in all configurations are the statistical Monte Carlo-based methods. While the Monte Carlo (MC) method is the most accurate method for resolving radiative heat transfer, it is also notoriously computationally prohibitive …

Kinetic Analysis Of Biosolid Pyrolysis, William Regan Kreutter

Master's Theses (2009 -)

Waste reduction and energy recovery have been an environmental focus. Many of these solutions involve the thermal degradation of waste, such as household garbage or organic waste. To help reduce the negative environmental impact associated with processes like incineration, methods have been developed to utilize the carbonaceous material and energy contained in waste. Wastewater treatment plants are responsible for collecting and cleaning billions of gallons of sewage and stormwater each year. The water collected goes through multiple cleaning stages before being discharged into surface water. Sewage sludge, commonly referred to as biosolids, are produced during the process. Biosolids are carbon …

The Characterization Of Char Particle Morphology And Its Effects On Combustion, Scott Jorgensen

Master's Theses (2009 -)

Char particle combustion typically occurs under internal diffusion control, which results in inter-particle reactant gradients. Reactant concentrations throughout the char’s carbon structure must be known in order to predict overall particle reaction rates. These concentrations can be predicted by analytical models; however, effects of char morphology are typically ignored within these simplified models. In order to incorporate these effects, the morphology of Illinois coal #6 was studied by visualizing their structure in three-dimensions through the use of micro-computed tomography. Morphological characteristics of macro-porosity, macro-porosity location, and wall thickness were then measured for the sampled char particles. The sampled char particles …