Digital Commons Network^™

Electrospray And Superlens Effect Of Microdroplets For Laser-Assisted Nanomanufacturing, Eduardo Castillo Orozco

Electronic Theses and Dissertations

Nanoparticles of various materials are known to exhibit excellent mechanical, chemical, electrical, and optical properties. However, it is difficult to deposit and transform nanoparticles into large two-dimensional and three-dimensional structures, such as thin films and discrete arrays. Electrospray technology and laser heating enable the deposition of these nanoparticles through the dual role of microdroplets as nanoparticle carriers and superlenses. The main goals of this dissertation are to delineate the electrospray modes, to achieve subwavelength focusing, and to enable a process for the deposition of nanoparticles into microlayers and discrete nanodots (a nanodot is a cluster of nanoparticles) on rigid and …

Modeling The Standard And Poor's 500 Index Via Wave Analytics: Harnessing Lag For Intraday Utilizations, John Cardenas

Electronic Theses and Dissertations

Modeling and simulation of financial instruments is accomplished from multiple approaches but most completely from an engineering perspective. Aeronautical engineering yields a wave model created for stock indices in the 1970s. This comprehensive methodology models stock markets as waves for the intention of trading or investing yet has not been applied on time periods smaller than daily or weekly, known as intraday. Stakeholders trading intraday waves need to utilize wave analysis for price capture, analytics, and profitability. It is the purpose of this thesis to present a model to harness wave analytics for the needs of traders seeking price capture …

Is Proactive Behavior Always Positive? An Examination Of Leader Reactions Based On Employee Gender And Organizational Crisis, Nicole Carusone

Electronic Theses and Dissertations

Organizations are increasingly looking to hire employees who are willing to take initiative and go above and beyond expectations (Campbell, 2000). To that aim, proactive behaviors have been increasingly considered as a potentially important characteristic of today's workers (Campbell, 2000). With workplaces becoming more decentralized and work becoming increasingly innovative and self-directed, organizations require employees who are able and willing to be proactive (Campbell, 2000; Frese & Fay, 2001). Researchers have found many benefits to proactive behavior, including increases in individual performance and innovation (Seibert, Kraimer, & Crant, 2001; Tornau & Frese, 2013). While proactive behavior may have many benefits, …

Psychophysiology Meets Computer Science: Predicting The Magnitude Of Participant Physiological Response With Machine Learning, Avonie Parchment

Electronic Theses and Dissertations

The present inquiry uses methods from psychophysiology and machine learning to reduce overall error in classification models. The field of psychophysiology, though rooted in decades of experimentation, has never reached the same level of precision as some aspects of medical inquiry. In fact, while some medical regression models, when determining some way to classify a patient's illness based on certain symptoms, can result in highly significant results with large effect sizes, equal levels are virtually unheard of in psychophysiology. The present investigation attempts to unravel some part of this mystery and determines some possible reasons for the difficulty in finding …

Use Of Accelerated Calcite Precipitation Method To Investigate Calcium Carbonate Precipitation From Recycled Concrete For Drainage System Applications, Toni Curate

Electronic Theses and Dissertations

Recycled concrete aggregate (RCA) is a sustainable construction material that is a viable option for use in drainage systems by replacing virgin aggregate. Replacing virgin aggregate with RCA is beneficial from both economic and environmental perspectives. However, the use of RCA as pipe backfill materials may cause a long-term performance issue such as potential clogging due to fines accumulation and calcite precipitation on filter fabric. Previous studies investigated the long-term performance of RCA regarding flow rate. Therefore, this study investigated calcite precipitation potential of RCA. The Accelerated Calcite Precipitation (ACP) procedure was devised and used to estimate "life-time" calcite precipitation …

Detailed Understanding Of Flow, Heat Transfer, And Pressure Drop Behavior In A Square Channel With 45 Deg Ribs, Lumaya Ahmed

Electronic Theses and Dissertations

Internal Duct Cooling (IDC) with rib turbulators is one of the common cooling techniques applied inside the turbine airfoils. It is very important for the gas turbine industry to design and develop an optimized cooling channel that maximizes the amount of heat removed, while simultaneously minimizing the pressure drop for a target overall cooling effectiveness. Angled ribs perform superior to the transverse ribs due to additional secondary flow associated with them. However, they result in a highly non-homogenous heat transfer distribution, which is a manifestation of the complex, turbulent flow field inside the channel. It is very important to comprehend …

Sinkhole Detection And Quantification Using Lidar Data, Amirarsalan Rajabi

Electronic Theses and Dissertations

The state of Florida is highly prone to sinkhole incident and formation, mainly because of the soluble carbonate bedrock which is susceptible to dissolution and groundwater recharge that causes internal soil erosions. Numerous sinkholes, particularly in Central Florida, have occurred. Florida Subsidence Incident Report (FSIR) database contains verified sinkholes with Global Positioning System (GPS) information. In addition to existing detection methods such as subsurface exploration and geophysical methods, a remote sensing method can be an alternative and efficient means to detect and characterize sinkholes with a wide coverage. the first part of this study is aimed at developing a method …

Brain Stethoscope: A Non-Invasive Method For Monitoring Intracranial Pressure, Md Khurshidul Azad

Electronic Theses and Dissertations

Monitoring intracranial pressure (ICP) is important for patients with increased intracranial pressure. Invasive methods of ICP monitoring include lumbar puncture manometry, which requires high precision, is costly, and can lead to complications. Non-invasive monitoring of ICP using tympanic membrane pulse (TMp) measurement can provide an alternative monitoring method that avoids such complications. In the current study, a piezo based sensor was designed, constructed and used to acquire TMp signals. The results showed that tympanic membrane waveform changed in morphology and amplitude with increased ICP, which was induced by changing subject position using a tilt table. In addition, the results suggest …

Applied Software Tools For Supporting Children With Intellectual Disabilities, Ahmad Abualsamid

Electronic Theses and Dissertations

We explored the level of technology utilization in supporting children with cognitive disabilities at schools, speech clinics, and with assistive communication at home. Anecdotal evidence, literature research, and our own survey of special needs educators in Central Florida reveal that use of technology is minimal in classrooms for students with special needs even when scientific research has shown the effectiveness of video modeling in teaching children with special needs new skills and behaviors. Research also shows that speech and language therapists utilize a manual approach to elicit and analyze language samples from children with special needs. While technology is utilized …

Examining Users' Application Permissions On Android Mobile Devices, Muhammad Safi

Electronic Theses and Dissertations

Mobile devices have become one of the most important computing platforms. The platform's portability and highly customized nature raises several privacy concerns. Therefore, understanding and predicting user privacy behavior has become very important if one is to design software which respects the privacy concerns of users. Various studies have been carried out to quantify user perceptions and concerns [23,36] and user characteristics which may predict privacy behavior [21,22,25]. Even though significant research exists regarding factors which affect user privacy behavior, there is gap in the literature when it comes to correlating these factors to objectively collected data from user devices. …

Professional Skill Development For Collegiate Recreation Student Employees, Peter Jacob Tulchinsky

Electronic Theses and Dissertations

Practitioners in the field of collegiate recreation have begun to place greater emphasis on the co-curricular learning experiences of undergraduate students who are employed in collegiate recreation departments. Institutions have implemented learning outcomes and career readiness assessments to measure student knowledge acquisition through on-campus employment. Astin (1993) suggested that on-campus, part-time employment positively impacted student development, specifically in terms of timely degree completion and more frequent self-reporting of cognitive and affective growth, while Pascarella and Terenzini (2005) reported that undergraduate employment is also linked to the attainment of higher levels of professional responsibility. The Dissertation in Practice (DiP) will examine …

African American And First-Generation Students’ Perceptions Of And Experiences With An Academic Cohort, Sovent Zantrell Taylor

Electronic Theses and Dissertations

Underrepresented student populations are faced with numerous barriers and are often overlooked on many college campuses. The aim of this research was to better understand academic cohorts and if they help reduce some of the barriers faced by African American and first-generation students which can ultimately affect retention and persistence to graduation. In order to gather this information, interviews and surveys were conducted with students once enrolled in the foundations for academic success track (Fastrack) program at the University of Mississippi. Results from the interviews and surveys indicate that while the Fastrack program seemed to support successful social transitions for …

Biodiversity And Evolution In The Guiana Shield, South America, Andrew Michael Snyder

Electronic Theses and Dissertations

The neotropics are characterized as the most species rich region in the world. Unfortunately, the region's unparalleled biodiversity has not protected it from ongoing threats such as agriculture, mining, logging, oil extraction, and climate change. I studied the biodiversity and evolution of the herpetofauna of South America in order to investigate the influence of historical geological and climatological events in shaping extant neotropical diversity, particularly the Guiana shield. For my research, I set out to explore the processes involved in shaping the remarkable extant diversity using anuran amphibians as models. With my dissertation, I provide a comprehensive review of the …

Multi-Hazard Vulnerability Assessment Of Monopile Foundation Offshore Wind Turbines, Jharna Pokhrel

Electronic Theses and Dissertations

Offshore Wind Turbines (OWTs) have increased in popularity because of numerous technological advancements in the sector of renewable energy. With such an increase in the number of installments, there is a need for multi-hazard vulnerability assessment of the OWT at a given site. Because of hurricane and tsunami loads pertaining to the offshore site, structural failure analysis with respect to wind and wave loads at the critical section of the OWT is required. The existing simulation methods for the failure assessment are computationally expensive and require many simulations to estimate the multi-hazard behavior. The goal of this thesis was to …

Rapid And Simultaneous Determination Of Nutritional Constituents Of United States Grown Oats Using Near Infrared Reflectance Spectroscopy (Nirs), Devendra Paudel

Electronic Theses and Dissertations

Oats is a unique cereal owing to its nutritional and health benefits. Near Infrared Reflectance Spectroscopy (NIRS) is an efficient tool for monitoring the quality of cereal foods. NIRS holds potential for non-destructive multicomponent oat analyses with advantage of large sample throughput, speed, and reduced cost. The purpose of this study was to develop predictive calibration models for estimating beta-glucan, protein, and oil content of US oat cultivars using NIRS and validated AACCI reference methods. A rapid, non-destructive (whole oat groat), and secondary NIRS method was developed to estimate beta-glucan, protein, and oil content based on the standard reference analyses …

Passive Voice Usage In Undergraduate Stem Textbooks, Huiyuan Luo

Electronic Theses and Dissertations

The present study, a corpus-based quantitative analysis, investigated the use of passive voice in terms of percentage (percentage of total passive usage), constructions (the most commonly used passive forms), and dispersion (the verbs that tended to be associated with passive usage) in college STEM textbooks, more specifically in Science, Technology, Engineering, and Mathematics. The corpus consisted of twenty textbooks with over 1 million running words selected from the textbooks' chapters. By identifying the main verbs and passive verbs used in the textbooks, the percentage of passive voice usage was calculated. The statistical difference of passive constructions between disciplines was examined …

Constituting Rhetorical Agency In A Feminist Discursive Space, Ella Raynor

Electronic Theses and Dissertations

This thesis details an analysis of a project called Exposing the Silence in order to learn about agency and discursive space. This gallery for traumatic birth stories serves as a relevant site for better understanding how women are constituting their experiences with embodied autonomy and rhetorical dis/empowerment and how they come together to visually and discursively form a feminist space online. I completed a rhetorical analysis of the birth narratives and of an interview with Lindsay Askins, one of the creators of Exposing the Silence. My study finds that a dyadic relationship between embodied autonomy and rhetorical agency exists while …

Preparation And Evaluation Of Cefuroxime Axetil Gastro-Retentive Floating Drug Delivery System For Improved Delivery Via Hot-Melt Extrusion Technology, Rahul Madhukar Lalge

Electronic Theses and Dissertations

Purpose: The objective of the present study was to develop lipid-based gastro-retentive floating drug delivery system of amorphous Cefuroxime Axetil (CA) to minimize the enzymatic degradation in the gastro intestinal tract utilizing hot-melt extrusion technology for improved absorption.

Methods: Preliminary studies were performed to select the appropriate lipids. Selected ratios of CA and lipids were extruded using a twin screw hot-melt extruder. Extrudates obtained were milled to obtain floating granules and were further evaluated for drug content, floating strength and micromeritic properties. In vitro drug release studies were performed in 900 mL of simulated gastric fluid (without enzyme) of pH …

Topical Formulation For Stimulating Sweat Secretion As An Alternative To Iontophoresis, Tasnim Fatima

Electronic Theses and Dissertations

Sweat test or pilocarpine iontophoresis test is the existing method for diagnosis of cystic fibrosis that is recommended to perform at 48 hours after birth. However, the current method is painful, with several side effects such as full thickness skin burn, skin rash, erythema etc. Therefore, the purpose of this study is to develop a pilocarpine topical formulation which can stimulate sweat secretion when applied on skin without iontophoresis. Several formulations with Transcutol®, polyethylene glycol 400 (PEG 400), Polyethylene glycol 200 (PEG 200), menthol and salicylic acid (SA) each at varying concentrations were screened as penetration enhancers. In vitro penetration …

Identifying Predictors Of New Teacher Retention, Bonita Lanoza Maready

Electronic Theses and Dissertations

Identifying Predictors of New Teacher Retention Abstract High teacher turnover is a financial and instructional problem in schools on the national, state, and district level. Because the greatest proportion of teacher attrition (not related to retirement) and turnover occurs in the first five years of beginning a teaching career, retaining new teachers is critical to the effective use of shrinking education budgets and bringing about instructional stability, particularly in high-poverty and high-minority schools and districts. The study utilized restricted-use data from the 2007-2012 Beginning Teacher Longitudinal Study (BTLS) to identify predictors of teachers remaining in their initial teaching assignment into …

Acute And Chronic Vascular Responses To Blood Flow Restriction In The Upper Body, J. Grant Mouser

Electronic Theses and Dissertations

Blood flow restriction (BFR) with low load exercise increases muscular size and strength. Little is known of vascular adaptations to this training modality, and nothing was known at very low loads. These studies examined cardiovascular responses to high load (70% of one-repetition maximum (1RM)) and very low load (15%1RM) exercise, alone or at two levels of BFR. Study 1: Participants performed unilateral biceps curls using either 15%1RM with no BFR (15/00), 40% of arterial occlusion pressure (AOP) (15/40), or 80%AOP (15/80), or 70%1RM (70/00). Systolic and diastolic blood pressure (SBP, DBP) and blood flow (BF) were measured in the arms …

Inland North: Stories, Elsa Nekola

Electronic Theses and Dissertations

A collection of original short stories.

Searching Through Debris: A Mass Analysis From The Carter Robinson Mound Site In Lee County, Virginia, Robert Capps

Electronic Theses and Dissertations

The Mississippian period is one of the most widely studied periods in the prehistoric Southeast, but there are areas such as the Mississippian frontier that have not been explored in great detail. Carter Robinson is a Mississippian chiefdom located on the frontier in southwest Virginia during the thirteenth and fourteenth centuries. To better understand the people living at this site a mass analysis was conducted to examine the lithic debris left behind by the people living there. The purpose of this thesis is to identify the degree of tool production at Carter Robinson and to identify areas of tool production, …

Energy Harvesting Nanocoated Piezoceramics For Low Power Systems, Quinten Humphrey

Electronic Theses and Dissertations

No abstract provided.

A Critical Examination Of Understanding’S Characteristics: Why, In A Sense, Understanding Is Unique, Christopher Becker

Electronic Theses and Dissertations

Is understanding a unique kind of epistemic state or simply another word for knowledge? Recently, there is a dispute in the literature between those, non-reductionists, who argue that we cannot reduce understanding to knowledge. Sliwa and Khalifa, two reductionists, on the other hand, argue that understanding is basically just another word for knowledge (if we are fairly comparing the two). After considering the dialectic between non-reductionists and reductionists, undogmatically, I argue that Sliwa's arguments in favor of reductionism fail. Sliwa's analytical argument in defense of reductionism is unsuccessful because a special kind of understanding, subjective understanding, can be independent of …

The Relationship Between Metacognitive Awareness Of Reading Strategies Use And 10th Grade Students' College And Career Readiness Achievement In English Language Arts, Davida Smith-Keita

Electronic Theses and Dissertations

This study examined the relationship between 10th grade students’ metacognitive awareness of readings strategies use and their college and career readiness achievement in English language arts as a primary focus of research and, secondarily, the relationship between metacognitive awareness of reading strategies use and Lexile® growth as a measure of reading ability. The explanatory research design for this quantitative study included a statistical analysis of scores from the Metacognitive Awareness of Reading Strategies Inventory (MARSI) (Mokhtari & Reichard, 2002), existing college and career readiness achievement scores from the 2016-2017 Georgia Milestones 9th Grade Literature and Composition summative assessment, and existing …

On The Future Of Antidepressant Treatments: Targeting Neurotrophic Factors And Plasticity, Stephen W. White

Electronic Theses and Dissertations

For 60-plus years the explanatory model for Major Depressive Disorder (MDD) has been the monoamine theory, which states that low levels of monoamine neurotransmitters or alterations in their post-synaptic receptors are responsible for depressive symptoms. Drugs designed to elevate synaptic monoamine levels have remained the first line of pharmacotherapy prescribed by clinicians for MDD patients. However, these drugs have shortcomings. Despite evidence that current antidepressants elevate synaptic monoamine levels within hours of administration, these drugs require four to six weeks of daily administration before symptom relief appears. Furthermore, approximately half of patients taking typical antidepressants never achieve full symptom relief. …

Marginal Revenue Product Of Division I Swimmers, Olivia Adele Raxter

Electronic Theses and Dissertations

To date, the National Collegiate Athletic Association (NCAA) has undergone an excessive amount of reforms including topics such as student-athlete well-being, academics, enforcement, resource allocation, and so forth. However, despite the constant stream of policy reforms there has been a significant lack of effective reform initiatives with reference to the economic state of the NCAA. This void is partially due to the lack of sufficient empirical evidence surrounding the economic discussion of college athletics, specifically in regards to the discussion of the potential for performance based compensation for student-athletes. Past research for such compensation has focused primarily on large revenue …

Predictors Of Dental Opioid Analgesic Prescribing, Opioid Use And Dental Emergency Department Visits In The Mississippi Medicaid Population, Chukwuebuka Dibie

Electronic Theses and Dissertations

OBJECTIVES: The objectives of this study were: (1) to determine prevalence of opioid analgesics prescribing for non-ED dental related visits in the Mississippi Medicaid population, (2) to assess predictors of receiving opioid analgesics following non-ED dental related events among Mississippi Medicaid beneficiaries, and (3) to determine prevalence of opioid analgesic prescribing for dental related emergency departments (ED) visits in the Mississippi Medicaid population. METHODS: A retrospective, cross-sectional, observational database analysis using Mississippi Medicaid administrative claims data from January 1, 2015 to December 31, 2016. Beneficiaries with dental related visits were included in this study. Descriptive statistics were utilized to assess …

Integrity Assessment Of Earthen Dams And Levees Using Cross-Plot Analysis Of Seismic Refraction And Electrical Resistivity Tomograms, Leti Teklu Wodajo

Electronic Theses and Dissertations

Geophysical methods provide a rapid, economical, non-invasive, and spatial coverage of the subsurface in terms of geophysical properties. On the other hand, geophysical methods can generate multiple geophysical anomalies. An anomaly on a seismic refraction or an electrical resistivity tomogram is an area that has different values compared to its surrounding. Geophysical anomalies in dams and levees can be due to the overall heterogeneity of the subsurface, structures such as principal spillways, artifacts of inversion software, or to a true compromised location, such as an air void due to internal erosion or seepage. Therefore, there is uncertainty involved with using …