Digital Commons Network^™

Seeing Reading In First-Year Composition, Matthew Felumlee

Theses and Dissertations

This dissertation focuses on a study of reading-into-writing strategies employed by students in two sections of first-year-composition (FYC) that were paired with a support course as part of an accelerated learning program (ALP) at a community college. Each FYC course was comprised of 11 students whom the college had deemed college-ready without the ALP course, and 11 students who were deemed at remedial levels in reading and / or writing and who were subsequently required to enroll in the ALP course. The study employs grounded theory methodology to identify and consider the many factors that influenced how reading was portrayed, …

Fine-Grained Topic Models Using Anchor Words, Jeffrey A. Lund

Theses and Dissertations

Topic modeling is an effective tool for analyzing the thematic content of large collections of text. However, traditional probabilistic topic modeling is limited to a small number of topics (typically no more than hundreds). We introduce fine-grained topic models, which have large numbers of nuanced and specific topics. We demonstrate that fine-grained topic models enable use cases not currently possible with current topic modeling techniques, including an automatic cross-referencing task in which short passages of text are linked to other topically related passages. We do so by leveraging anchor methods, a recent class of topic model based on non-negative matrix …

The Creation, Validation, And Implementation Of The Engineering Process Safety Research Instrument, Brittany Lynn Butler

Theses and Dissertations

The purpose of this study was to develop and validate an instrument that can measure how senior chemical engineering students make process safety decisions. The Engineering Process Safety Research Instrument (EPSRI) contains dilemmas that represent process safety scenarios, followed by three decision options, and 12-15 considerations that fall into pre-conventional, conventional, or post-conventional forms of reasoning. Three studies were completed as a part of this research. The content validation study ensured the dilemmas represented process safety scenarios, the considerations matched their perceived theoretical definitions, and that no content areas were omitted. This study resulted in validation of the content, following …

Electrical Characterization Of Crystalline Uo2, Tho2 And U0.71Th0.29O2, Christina L. Dugan

Theses and Dissertations

Uranium dioxide (UO₂), thorium dioxide (ThO₂), and U_xTh_1-xO₂ alloys are characterized for suitability in uranium-based neutron detectors. ThO₂ was studied for an envisioned UO₂/ThO₂ heterojunction. A U_0.71Th_0.29O₂ alloy was studied because of its resistance to oxidation and potential use in surface passivation. The U_0.71Th_0.29O₂ effective Debye temperature of 217± 24 K was measured using temperature-dependent x-ray photoemission spectroscopy (XPS). The specific heat capacity for the U_0.71Th_0.29O₂ alloy was calculated from the Debye …

Transition, Mattering And Marginality: Deaf Students In A Hearing Institution, Kaitlin Shaginaw

Theses and Dissertations

The purpose of this study is to gather deaf student feedback and to better understand if they feel as though they matter to Rowan University. This study also provides an opportunity for deaf students to express their experiences transitioning from K-12 to a higher education institution. A total population of 24 were targeted in this study and they had the opportunity to complete the College Mattering Inventory (CMI), which showed their feelings of mattering verses marginality. A total of 83% of the population responded to this study. Following the completion of the survey, a total of three subject agreed to …

Mattering Versus Marginality: African American Student Perspective At Rowan University, Dante Dandridge

Theses and Dissertations

The purpose of this study was to gauge the perceptions of African American students in the areas of social interaction, classroom climate, faculty interactions and administrative support and determining if these students felt marginalized or if they matter in those areas. The study also intended to find correlations between mattering and academic success as well as active campus participation with a feeling of mattering. The survey used was adapted from Lovely Durham, who condensed the survey Perceptions on Community, and handed out to a portion of the African American students at Rowan University.

Examining The Role Of Professional Orientation In How Trustees Of New Jersey's State Colleges And Universities Experience Their Fiduciary Responsibilities: A Mixed Methods Study, Brittany Ann Williams-Goldstein

Theses and Dissertations

The purpose of this sequential explanatory study was to examine, through the lenses of sensemaking theory and professional authority, the relationship between how largely non-educational professionals in New Jersey experience their fiduciary responsibilities as trustees of the state's public colleges and universities and to what extent their professional orientations influence their oversight.

Trustees draw from a continuum of orientations to navigate their responsibilities and chief among them are professional orientation, institutionally-rooted orientation, and orientations as members of traditionally underrepresented populations. Trustees frequently engage in deferential activities with their fellow board members whose professional or other orientations provide needed context for …

Mechanical Property Development And Numerical Modeling Of Ultra-High Performance Concrete Focused On Isothermal Curing Conditions, Thomas Allard

Theses and Dissertations

Ultra-high performance concrete (UHPC) has progressively gained interest because of its favorable strength and durability properties. Literature shows that curing temperature has a significant effect on the resultant mechanical properties of UHPC, generally resulting in increased compressive strength. However, limited datasets are currently available to ascertain the degree of change related to compressive strength as a function of curing temperature and conditions. This study investigates the effect of isothermal and submerged curing temperature conditions, ranging from 10°C to 90°C, on the compressive strength and elastic modulus development of UHPC and generates a numerical model to capture these effects. The extent …

Refining Spawning Protocols For Crappie, Christian A. Shirley

Theses and Dissertations

White Crappie (Pomoxis annularis) and Black Crappie (P. nigromaculatus) are popular North American gamefish; however, frequent fluctuations in year class strength present a management challenge for recreational fisheries. Intensive aquaculture production has the potential to address this challenge through controlled hatchery reproduction for supplemental stocking, but further study is needed to refine and optimize techniques. Therefore, this study evaluated the effects of hormone injection timing on latency period and spawning success, examined effective cryopreservation techniques for black-stripe Black Crappie sperm (a preferred hatchery phenotype), and compared simulated spring duration on out-of-season spawning success. Latency period for White Crappie did not …

Distributed Predictive Control For Mvdc Shipboard Power System Management, Nasibeh Zohrabi

Theses and Dissertations

Shipboard Power System (SPS) is known as an independent controlled small electric network powered by the distributed onboard generation system. Since many electric components are tightly coupled in a small space and the system is not supported with a relatively stronger grid, SPS is more susceptible to unexpected disturbances and physical damages compared to conventional terrestrial power systems. Among different distribution configurations, power-electronic based DC distribution is considered the trending technology for the next-generation U.S. Navy fleet design to replace the conventional AC-based distribution. This research presents appropriate control management frameworks to improve the Medium-Voltage DC (MVDC) shipboard power system …

Individual Differences In Creative Cognition, Sarah K. Craig

Theses and Dissertations

Creativity is increasing in value worldwide, but the processes underlying various creative abilities remain ambiguous. The most frequently used assessments of creativity (i.e., divergent thinking tasks; creative problem-solving tasks) differ in surface features and are also rarely examined together. These inconsistencies, in addition to mixed findings in the literature, have caused considerable debate among creativity researchers concerning the particular roles of independent or dual processes that lead to success on different creativity tests. The present study expounded upon these mixed findings using a factor analytic method. The results indicated that individual differences in working memory and fluency ability impact performance …

Healthcare Experiences Of Transgender Mississippians: A Qualitative Study, Micah D. King

Theses and Dissertations

For this study, in-depth, semi-structured interviews were conducted with 16 transgender adults who lived, or had previously lived, in Mississippi and sought healthcare services in the state. The questions asked focused on identifying the barriers to care that these individuals faced as well as the strategies for navigating the barriers they employed. Recommendations for providers were also considered.

Experimental And Numerical Studies Of Lightning Strike Induced Damage To Carbon Fiber Epoxy Composites, Pedram Gharghabi

Theses and Dissertations

The objective of this study is to investigate the interaction between a lightning strike and carbon/fiber composites. The first approach is to characterize the damage development in a composite structure subjected to simulated lightning strikes. Several existing studies have acknowledged that the lightning induced damaged can be categorized into two separate domains of damage; a primary domain of damage that occurs at the attachment point, and a secondary domain of damage that is typically formed around the attachment point. Quantitative studies of the causes of the primary damage domain are not satisfactory for explaining the secondary damage domain and thus, …

Exploration Of Factors Affecting Single Black Mothers' Facilitation Of Father-Child Relationships, Shawn'ta Gardner

Theses and Dissertations

Literature shows that when fathers are involved in their children’s lives, their children have better outcomes and neighborhoods are safer. However, father involvement is often limited in situations where the father is a non-residential parent. Previous research has indicated that there are several factors that may influence a custodial mother’s facilitation of the father-child relationship. These factors may include the existing co-parenting relationship between mother and father and the mother’s perception of the father’s appreciation of her mothering of the child. Particularly in low-income families, the struggle to simply meet economic demands overrides a custodial parent’s desire to facilitate the …

Numerical Study And Investigation Of A Gurney Flap Supersonic Nozzle, Mohammed El Mellouki

Theses and Dissertations

Flow separation is a common fluid dynamics phenomenon that occurs within supersonic nozzles while operating at off-design pressures. Typically, off-design pressures result in a shock formation that leads to a non-uniformity of the exiting flow and creates flow separation and flow recirculation. So far, no effective solution has been presented to eliminate flow separation and increase the total performance of the nozzle. The purpose of this work is to investigate whether a Gurney flap may beneficially affect the exiting flow pattern. For a better understanding of the Gurney flap effect, this investigation used a supersonic nozzle geometry based on a …

The Effects Of Dual Enrollment On An Institution: Student Persistence And Degree Attainment At The Community College, Stacey S. Irwin

Theses and Dissertations

The overall college enrollment rates for young adults have increased over the last several years. While this is promising, a notable amount of students do not attain a degree. This scenario can create major consequences for the United States as global competitiveness requires a workforce that possesses a postsecondary degree. Dual enrollment is a program that has been seen to answer the need for more postsecondary graduates. Despite the robust literature that suggests the positive effects for students who participate in dual enrollment, limited research exists on the effects of dual enrollment on the institution. Therefore, this study attempted to …

Detailed Beta-Decay Studies Of Neutron-Rich 74-77ga Isotopes, Umesh Silwal

Theses and Dissertations

The National Nuclear Data Center (NNDC) contains a compilation of information on the beta decays of Gallium isotopes. In the mass range A = 74 to 77, the Germanium daughters lie close to or at the valley of stability leading us to believe the decays would have been well studied. However, closer inspection indicates significant conflict for placement of gamma rays and energy levels between different measurements, especially for upper-lying states. Detailed beta-decay studies for the 74-77Ga isotopes were performed using a high resolution four clover Hyper-Pure Germanium (HPGe) detector system with two beta scintillators in the Holifield Radioactive Ion …

Creating New Germplasm To Improve Aflatoxin Resistance In Maize, Oluwaseun Felix Ogunola

Theses and Dissertations

Maize (Zea mays L), the third largest crop produced in the world is susceptible to pre and post contamination of aflatoxin. Aflatoxin is a secondary carcinogenic metabolite produced by Aspergillus flavus, an opportunistic fungus of maize that causes ear-rot and subsequent production of aflatoxin. Host plant resistance is one of the promising long term solution to combat aflatoxin contamination in maize grains. Resistance to aflatoxin is heritable and resistant germplasms that can be used to reduce aflatoxin resistance has been developed. Creating quantitative trait loci (QTL) mapping populations to identify regions within maize chromosomes contributing to aflatoxin resistance help identify …

Scaling Undergraduate Scientific Writing Via Prominent Feature Analysis, Katarzyna Zaruska Gallo

Theses and Dissertations

Prominent Feature Analysis (PFA) is a reliable and valid writing assessment tool, derived from the writing it is used to assess. PFA, used to assess on-demand expository essays in Grades 3-12, uncovers positive and negative characteristics of a sample. To extend PFA to a new academic level and genre, I assessed scientific writing of 208 undergraduates, identifying 35 linguistic and 20 scientific prominent features. An essay could earn up to 28 positive (24 linguistic and four scientific), and up to 27 negative marks (11 linguistic and 16 scientific). The minimum prominent features number in a paper was 3, the maximum …

Transferability Of Maxent And Expert Opinion Models For American Beaver, Isidro A. Barela

Theses and Dissertations

Modeling habitat suitability is beneficial for management and conservation of a species. Although data-rich models are commonly used, opinion-based models may be a beneficial alternative to estimate suitable habitat locations. Despite the increasing use of habitat models, few studies have linked habitat model covariates (i.e., land cover, weather, and normalized difference vegetation indexes (NDVI)) to demographic parameters. This study evaluates model performance and transferability of maximum entropy (MaxEnt) and expert opinion models for predicting American beaver (Castor canadensis) distribution in the southeastern US. I also investigated the relationship of environmental and habitat model covariates to beaver survival. The model’s predictive …

Synthesis, Characterization, And Photophysics Of Symmetric And Unsymmetric -Nhc Pincer Platinum Halide Complexes And Derivatives, Min Zhang

Theses and Dissertations

A series of 24 new photoluminescent symmetric and unsymmetric -NHC pincer Pt complexes was synthesized and characterized, including collection of their 195Pt NMR chemical shifts. In total 18 new X-ray crystal structures, and photophysical studies of these photoluminescent -NHC pincer Pt complexes are reported. -NHC pincer Pt complexes were synthesized and characterized using new -NHC pincer based proligands [(RChetChetCRH3)X2, X = Cl, Br, or BPh4, where het represents imidazolyl, benzimidazolyl, and 1,2,4-triazolyl moieties; R = n-butyl, 3,3-dimethylbutyl, n-hexyl] as starting materials. A new method to synthesize Pt-Cl complexes to prevent halogen mixing was developed using tetraphenylborate salts as proligands. -NHC …

The Role Of Early Visual Cortex In Global Motion Processing, Marshall L. Green

Theses and Dissertations

Both visual area V1 and the medial temporal (MT) region of the human brain play a role in motion perception. V1 is thought to process "local motion," such as the movement of a single bird flying across a relatively small part of space, while MT is thought to process "global motion," such as the movement of an entire flock of birds flying across the sky. However, recent studies using fMRI to measure human brain activity have identified signals in V1 that appear to be global motion signals, although it is unclear whether these are related to global motion processing or …

Transient Seepage In A Variably Saturated Levee: Laboratory Testing, Field Monitoring And Numerical Modeling, Xavier Arnaldo Rivera-Hernandez

Theses and Dissertations

Several hydraulic loadings impose earthen levees to time-dependent variably saturated seepage conditions. The main objective of this study is to improve the analysis of levees under transient seepage with the use of unsaturated soil mechanics. An extensive set of laboratory testing, field monitoring and numerical modeling are performed to analyze a silty sand setback levee located near Seattle, WA. In-situ data obtained from field monitoring are used to monitor suction and effective stress within the levee’s embankment and foundation over the past two years. Soil samples taken from the site are used to perform index, water retention, and unsaturated multi-stage …

An Experimental Method For Testing Materials At The Intermediate Strain Rate With Closed Loop Control, Cory N. Krivanec

Theses and Dissertations

Quasi static and intermediate strain rate (5 s-1 and 500 s-1) tests are conducted on various aluminum and steel ASTM E8 subsize tensile specimens to validate a newly developed testing method which combines a previously developed serpentine bar for load monitoring and a newly described high-speed actuator. This new actuator is controlled by a semi-passive piezoelectrically actuated brake system mounted to a standard actuator, which allows for the actuator to produce high loads and quick response times (≈100 µs). Limitations of this experimental method are that tests must be monotonic (tension or compression but not cyclic loading) and strain rate …

Beta Diversity Provides Evidence Of Niche Based Assembly In Temperate Forest Understory Assemblages Of Mississippi, David Steven Mason

Theses and Dissertations

Assembly is a process that shapes the abundance and identity of species in a community. Niche and neutral theory explain assembly processes with mechanisms driven by either species differences, or functional equivalence and stochastic dispersal. In 2017 I sampled vegetation and environmental variables at 59 sites in the Noxubee National Wildlife Refuge and Tombigbee National Forest of Mississippi to explore forest understory community assembly. I developed and assessed a framework of predictions concerning general patterns and underlying mechanism. Evidence of dispersal limitation and functional equivalence were expected under neutral theory. Local environmental characteristics, surrounding landscape variables, and fire were significant …

Ab Initio Molecular Dynamics Simulations To Understand Speciation And Solvation Structure Of Common Herbicides, Zachary W. Windom

Theses and Dissertations

The application of commercial herbicide restricts weed growth and significantly improves control over crop vitality and yield. Despite their utility in the agriculture sector, herbicides have the potential to contaminate local water sources. To minimize environmental impacts, the development of efficient separation processes to clean-up contaminated water bodies is necessary. However, complex speciation and conformational flexibility in the condensed phase poses a significant challenge. In this work, we investigate structure and speciation of three common organic herbicides (glyphosate, atrazine, and metolachlor) in aqueous solution. We employ the PBE-D3 density functional to perform ab initio molecular dynamics (MD) simulations in the …

Corrosion Of Hydraulic Steel Structures And Preventive Measures, Jackson Daniel Hinton

Theses and Dissertations

Hydraulic steel structures (HSS) are key components of U.S. Army Corps of Engineers infrastructure and are subject to corrosive environments, unpredictable loadings, and extreme conditions. Corrosion can take many forms and can cause costly damage to HSS due to inadequate design of protective measures. There are numerous forms of corrosion that have a negative effect on HSS, as well as material properties that need consideration when design HSS preventive measures. Understanding corrosion and providing proper preventive measures is crucial for HSS. Proper maintenance and repair of these protection systems also play a significant part in corrosion control of HSS.

Establishing And Evaluating Agricultural Plantings And Supplemental Cover On Reservoir Mudflats As A Means To Increase Juvenile Game Fish Abundance And Growth, Hunter R. Hatcher

Theses and Dissertations

Reservoirs throughout the country exhibit degraded shorelines and simplified littoral habitats because of aging. This study evaluated the establishment of agricultural plantings on reservoir mudflats and the effectiveness of supplemental brush pile structures in providing recruitment habitat for juvenile fish. The mudflats of Enid Reservoir, Mississippi were seeded during the winter drawdown in October of 2016 and 2017 with agricultural plantings. Monitoring of plantings found grasses performed best in terms of establishment and providing potential fish habitat. During Summer 2017 brush piles and control sites, without brush, were sampled in Enid Reservoir using rotenone to evaluate juvenile fish use. Juvenile …

Effect Of Multiple Knots In Close Proximity On Southern Pine Lumber Properties, Marcela Cordeiro Barbosa

Theses and Dissertations

This research investigates the effect that knots in close proximity have on strength properties of southern pine lumber. The project involved specimens of 2×4 dimension southern yellow pine lumber exhibiting multiple knots in close proximity. Knot dimensions were measured to determine the knot diameter (KD) parallel to the cross-section of the specimen, knot area (KA), and clear wood (CW). In addition, the density (D) using the entire specimen weight by volume was determined. A third-point bending test was used in a flatwise orientation to quantify the modulus of rupture (MOR) and modulus of elasticity (MOE). The relationships between the simple …

Effect Of The Spray Droplet Size And Herbicide Physiochemical Properties On Pre-Emergence Herbicide Efficacy For Weed Control In Soybeans, Pedro Henrique Urach Ferreira

Theses and Dissertations

Field studies conducted in Missouri and Mississippi, in 2017 and 2018, respectively, indicated no droplet size effect on PRE herbicide efficacy, regardless of the herbicide, weed, soil, crop residue and weather conditions during spraying. Nozzle type enhanced herbicide efficacy for one location and herbicide. The TTI60 dual fan nozzle increased pendimethalin weed control, up to 91%, in a high organic matter (OM) soil with large clods and substantial weed pressure. Pendimethalin efficacy was reduced under high OM soils (> 2%) while metribuzin efficacy was reduced under low OM (< 0.7%), low cation exchange capacity (<13.1%) soils and 12.2 mm of rain three days after application. The greenhouse studies indicated that increasing crop residue levels reduced velvetleaf control by 7%. Simulated rainfall eight days after herbicide application decreased johnsongrass dry weight reductions by 29% in comparison to two day rainfall.