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Articles 10201 - 10230 of 35662
Full-Text Articles in Entire DC Network
Investigating The Effectiveness Of Using Part-Task Or Whole-Task Training Methods To Facilitate Mindful Abstraction In Uncertain Tasks, John Killilea
Investigating The Effectiveness Of Using Part-Task Or Whole-Task Training Methods To Facilitate Mindful Abstraction In Uncertain Tasks, John Killilea
Electronic Theses and Dissertations
As the global landscape changes and powers rise and fall, the Contested, Degraded, and Operationally Limited (CDO) environment is likely to be the new normal going forward. Uncertainty variables, such as missing, false, or extra information characterize the CDO environment. A key focus of this dissertation is optimizing training for recognizing these uncertainty variables when training time is limited. This was investigated by either exposing participants to multiple uncertainty variables at a time with low doses of each (whole-task training), by exposing singular variables at a time with high doses (part-task training) or using no variables throughout training (control). A …
Tuning Chemical And Optical Properties Of Nanomaterials: From Extended Surfaces To Finite Nanoclusters, Zahra Hooshmand Gharehbagh
Tuning Chemical And Optical Properties Of Nanomaterials: From Extended Surfaces To Finite Nanoclusters, Zahra Hooshmand Gharehbagh
Electronic Theses and Dissertations
Modifying the electronic and optical properties of surfaces and nanostructures are in the forefront of surface science. This dissertation's focus is on this problem. The first part is on the adsorption of functionalized naphthalene molecules on Cu(111) surface. The results show that changing the functional group results in modification of charge redistribution at the interface of molecule and surface and the electronic structure of Cu changes. The second part discusses the new Moire structure of h-BN on Rh(111) induced by intrinsic carbon impurities of Rh single crystals. We found that these impurities intercalate between h-BN and Rh(111) with new local …
App-Ily Ever After - Self-Presentation And Perception Of Others On The Dating App Tinder, Johnathan Dunlop
App-Ily Ever After - Self-Presentation And Perception Of Others On The Dating App Tinder, Johnathan Dunlop
Electronic Theses and Dissertations
Location-based real-time dating (LBRTD) apps have become an increasingly common way for people to broaden their social network and meet others for the purposes of dating, friendship, and more. This investigation focused on Tinder, presently the most widely-used LBRTD app. Semi-structured interviews were conducted with twenty-three current and recent Tinder users to gain insight into their self-presentation strategies and impressions of others on the app. The questions concentrated around four major topic areas: use of photos, use of bio text, perception of others, and real or imagined deception. A grounded theory approach was used to frame the data. From this, …
Examining Followership Role Orientation, Douglas Monsky
Examining Followership Role Orientation, Douglas Monsky
Electronic Theses and Dissertations
This study attempts to make steps toward filling significant gaps in the followership literature. The study of followership has often been seen through the lens of leaders' ability to impart change in follower behavior. In doing so, the literature has primarily focused on leader behavior as the agent of change rather than acknowledging followers as active agents in their own behaviors. However, some recent research has shown the emergence of followers as the primary focus, even looking at how their actions can change the way leaders act. This research focuses primarily on followership role orientations as mental models which specify …
Role Of Single Nucleotide Polymorphisms (Snps) In Ptpn2/22 And Mycobacterium Avium Subspecies Paratuberculosis (Map) In Rheumatoid Arthritis And Crohn's Disease, Robert Sharp
Electronic Theses and Dissertations
Both genetic pre-disposition and potential environmental triggers are shared between Rheumatoid arthritis (RA) and Crohn's disease (CD). We hypothesized that single nucleotide polymorphisms (SNPs) in the negative T-cell regulators Protein Tyrosine Phosphatase Nonreceptor type 2 and 22 (PTPN2/22) lead to a dysregulated immune response as seen in RA and CD. To test the hypothesis, peripheral leukocytes samples from 204 consented subjects were TaqMan genotyped for 9 SNPs in PTPN2/22. The SNPs effect on PTPN2/22 and IFN-y expression was determined using RT-PCR. Blood samples were analyzed for the Mycobacterium avium subspecies paratuberculosis (MAP) IS900 gene by nPCR. T-cell proliferation and response …
Semiconductor Design And Manufacturing Interplay To Achieve Higher Yields At Reduced Costs Using Smart Techniques, Ankush Bharati Oberai
Semiconductor Design And Manufacturing Interplay To Achieve Higher Yields At Reduced Costs Using Smart Techniques, Ankush Bharati Oberai
Electronic Theses and Dissertations
Since the outset of IC Semiconductor market there has been a gap between its design and manufacturing communities. This gap continued to grow as the device geometries started to shrink and the manufacturing processes and tools got more complex. This gap lowered the manufacturing yield, leading to higher cost of ICs and delay in their time to market. It also impacted performance of the ICs, impacting the overall functionality of the systems they were integrated in. However, in the recent years there have been major efforts to bridge the gap between design and manufacturing using software solutions by providing closer …
Cavity-Coupled Plasmonic Systems For Enhanced Light-Matter Interactions, Abraham Vazquez-Guardado
Cavity-Coupled Plasmonic Systems For Enhanced Light-Matter Interactions, Abraham Vazquez-Guardado
Electronic Theses and Dissertations
Light-matter interaction is a pivotal effect that involves the synergetic interplay of electromag- netic fields with fundamental particles. In this regard localized surface plasmons (LSP) arise from coherent interaction of the electromagnetic field with the collective oscillation of free electrons in confined sub-wavelength environments. Their most attractive properties are strong field en- hancements at the near field, highly inhomogeneous, peculiar temporal and spatial distributions and unique polarization properties. LSP systems also offer a unique playground for fundamental electromagnetic physics where micro-scale systemic properties can be studied in the macro-scale. These important properties and opportunities are brought up in this work …
Development Of A Capacitive Photocurrent Scanning Microscope With Carrier Depletion Super-Resolution., Austin Levi Carver
Development Of A Capacitive Photocurrent Scanning Microscope With Carrier Depletion Super-Resolution., Austin Levi Carver
Electronic Theses and Dissertations
This dissertation discusses the development and refinement of a new two-dimensional imaging technique, funded in part through a NSF MRI equipment development grant. Capacitive-Photocurrent (CPC) spectroscopy allows for the probing of samples without the requirement of free-carrier collection. The CPC technique allows for the studying of various states within a material. With this electronic measurement technique, we developed a scanning technique, scanning-CPC, that provides two-dimensional material property images without requiring environments that must be high-vacuum, humidity-controlled, or temperature-controlled. This new technique also provides two-dimensional, electronic mapping without damaging samples. With this successful result, we then modified an existing resolution improving …
A Framework For Miniaturized Mechanical Characterization Of Tensile, Creep, And Fatigue Properties Of Slm Alloys, Jonathan Torres-Caceres
A Framework For Miniaturized Mechanical Characterization Of Tensile, Creep, And Fatigue Properties Of Slm Alloys, Jonathan Torres-Caceres
Electronic Theses and Dissertations
With the heightened design complexity that may be achieved through additive manufacturing (AM) comes an equally complex set of distinct material characteristics. To properly characterize new materials for use in selective laser melting (SLM), extensive analysis is necessary. Traditional testing techniques, however, can be prohibitive in time and cost incurred. The small punch test (SPT) has been developed for such purposes, where material is scarce or costly. Although lacking standardization, SPT has been successfully employed with various materials to assess material properties such as the yield and ultimate strength and verified by traditional testing results. With the accompaniment of numerical …
Multi-Scale Fluid-Structure Interaction Model Analysis Of Patient-Specific Geometry For Optimization Of Lvad Outflow Graft Implantation: An Investigation Aimed At Reducing Stroke Risk, Ray Prather
Electronic Theses and Dissertations
A Left Ventricular Assist Device (LVAD), is a mechanical pump capable of providing circulatory myocardium relief when used as bridge-to-transplantation by reducing the workload of a failing heart, with the additional bonus of allowing for cardiac recovery when used as destination therapy. The newer generations of continuous flow VADs are essentially axial or radial flow pumps, and while these devices are capable their efficiency depends upon fluid composition and flow field patterns. The most devastating complication of VAD therapy is caused by embolization of thrombi formed within the LVAD or inside the heart into the brain leading to stroke. Anticoagulation …
Two Applications Of Financial Economics To Real Estate, Jeffrey Dibartolomeo
Two Applications Of Financial Economics To Real Estate, Jeffrey Dibartolomeo
Electronic Theses and Dissertations
My first essay examines the effects of dividend policy on the liquidity risk of REITs. I argue that the mandatory high cash payouts of REITs reduce investor reliance on the stock market to satisfy their liquidity needs. Using a sample of equity REITs from 1980 through 2015, I find strong empirical evidence consistent with this paradigm. Unlike non-REIT property companies, I find REITs exhibit negative sensitivity to marketwide liquidity shocks; a result that is evident across most property type sectors. Moreover, while my findings are robust across a wide range of portfolios based on size, dividend frequency, leverage, market-to-book, operations …
Advancing Practical Specification Techniques For Modern Software Systems, John Singleton
Advancing Practical Specification Techniques For Modern Software Systems, John Singleton
Electronic Theses and Dissertations
The pervasive nature of software (and the tendency for it to contain errors) has long been a concern of theoretical computer scientists. Many investigators have endeavored to produce theories, tools, and techniques for verifying the behavior of software systems. One of the most promising lines of research is that of formal specification, which is a subset of the larger field of formal methods. In formal specification, one composes a precise mathematical description of a software system and uses tools and techniques to ensure that the software that has been written conforms to this specification. Examples of such systems are Z …
Necessary Conditions For Open-Ended Evolution, Lisa Soros
Necessary Conditions For Open-Ended Evolution, Lisa Soros
Electronic Theses and Dissertations
Evolution on Earth is widely considered to be an effectively endless process. Though this phenomenon of open-ended evolution (OEE) has been a topic of interest in the artificial life community since its beginnings, the field still lacks an empirically validated theory of what exactly is necessary to reproduce the phenomenon in general (including in domains quite unlike Earth). This dissertation (1) enumerates a set of conditions hypothesized to be necessary for OEE in addition to (2) introducing an artificial life world called Chromaria that incorporates each of the hypothesized necessary conditions. It then (3) describes a set of experiments with …
Reproductive Rights And Justice Advocacy In Central Florida: Who Is Represented?, Mary Hager
Reproductive Rights And Justice Advocacy In Central Florida: Who Is Represented?, Mary Hager
Electronic Theses and Dissertations
This thesis examines the racial understanding and social relationships of Planned Parenthood of Southwest and Central Florida staff and volunteers. As well, this research explores how Planned Parenthood supporters organize and promote diverse advocacy work to promote reproductive justice in social media and volunteer education. Planned Parenthood has been at the forefront of reproductive rights campaigns for over a century, and their work has often tied into contemporary feminist and political issues. Of note, feminists of color have called for a shift from advocacy for "reproductive choice" to "reproductive justice" as a way to identify the needs and predicaments of …
Polyelectrolyte Complexes Based On Poly(Acrylic Acid): Mechanics And Applications, Xiaoyan Lu
Polyelectrolyte Complexes Based On Poly(Acrylic Acid): Mechanics And Applications, Xiaoyan Lu
Electronic Theses and Dissertations
Poly(acrylic acid) (PAA) is a weak polyelectrolyte presenting negative charge at basic condition when the carboxylic group loses a proton. These carboxylate group can interact with polycations and metal ions to form stable polyelectrolyte complexes (PECs), leading to tunable properties and multifunctional nanoscale structures through chemical reactions. This research focuses on nanofiber and nanoparticle fabricated by PAA-based PECs. We demonstrated the effect of ferric ion concentration on the mechanical properties of PAA-based single naonofiber by using dark field microscopy imaging and persistence length analysis. The application of PAA-based nanofiber mats loaded with MnO2 for supercapacitors was also explored. As a …
International Students' Expectations Of And Satisfaction With Academic Advising At A Community College, Marieta Chemishanova
International Students' Expectations Of And Satisfaction With Academic Advising At A Community College, Marieta Chemishanova
Electronic Theses and Dissertations
This study sought to identify what expectations international students' had with regards to academic advising and how satisfied they were with their advising experience at a large community college in a southeastern state in the United States. Previous research on academic advising services (e.g. Belcheir, 1999; Hale, Graham, & Johnson, 2009; Mottarella, Fritzsche, & Cerabino, 2004; Propp & Rhodes, 2006; Lynch, 2004; Smith & Allen, 2006) had not distinguished between domestic and international students' expectations of and satisfaction with advising especially at the 2-year and community college levels and in organizational structures where the foreign student advisors serve as both …
College Student Attitudes Towards Free Speech And Expression, David Oglethorpe
College Student Attitudes Towards Free Speech And Expression, David Oglethorpe
Electronic Theses and Dissertations
Throughout its storied history, higher education in the United States has dealt with the challenges of free speech. From Harvard's 1766 'bad butter riot' to hateful speech directed towards students by non-university community members, balancing the need for free speech with maintaining a welcoming and inclusive campus environment stands as an immense test for higher education (Papandrea, 2017). Idealism and ethicality aside, lost in the academic debate over liberty and protections are the views of those who should best help shine a light on such a divisive issue: students. This dissertation creates a quantitative path to understanding those very viewpoints. …
Analyzing Destination Choices Of Tourists And Residents From Location Based Social Media Data, Md Mehedi Hasnat
Analyzing Destination Choices Of Tourists And Residents From Location Based Social Media Data, Md Mehedi Hasnat
Electronic Theses and Dissertations
Ubiquitous uses of social media platforms in smartphones have created an opportunity to gather digital traces of individual activities at a large scale. Traditional travel surveys fall short in collecting longitudinal travel behavior data for a large number of people in a cost effective way, especially for the transient population such as tourists. This study presents an innovating methodological framework, using machine learning and econometric approaches, to gather and analyze location-based social media (LBSM) data to understand individual destination choices. First, using Twitter's search interface, we have collected Twitter posts of nearly 156,000 users for the state of Florida. We …
Assessing The Impact Of Radionuclides Released Into The Floridan Aquifer By A Massive Sinkhole On Local Municipal Water Supplies, Maria Arenas Daza
Assessing The Impact Of Radionuclides Released Into The Floridan Aquifer By A Massive Sinkhole On Local Municipal Water Supplies, Maria Arenas Daza
Electronic Theses and Dissertations
In late August 2016, a sinkhole spanning 45 feet (13.7 meters) in diameter opened at a phosphate fertilizer facility (Mosaic Company) near Mulberry, Florida, leaking an estimated 215 million gallons (813,000 cubic meters) of radionuclide-contaminated water 300 feet into the Floridan aquifer. An investigation to determine possible impacts to the environment and local community drinking water supplies was implemented that focused on two 1.5 million gallon per day (MGD) Tampa Bay Water (TBW) production wells and two Polk County Utilities (PCU) water treatment facilities. Water samples collected between June 2017 and January 2018 at the TBW and PCU sites were …
What #Nowomanever Wants To Hear: The Social Construction Of Corrective Facework After Street Harassment, Emily Knapp
What #Nowomanever Wants To Hear: The Social Construction Of Corrective Facework After Street Harassment, Emily Knapp
Electronic Theses and Dissertations
The purpose of the present study was to investigate the social construction of women's corrective facework after experiencing gender based street harassment. A thematic analysis using open coding was used to explore, examine, and identify themes within the data. Three major themes were revealed in the data and they are 1) a resistance against a cycle of facework, 2) public spaces without accountability, and 3) disproportionate responses from men. In addition to the three themes, I will present an interpretation of Twitter as a public journal used to resist normative realities of gender based street harassment. These results are important …
Coming To A Full Stop: An Investigation Of Menstrual Period Stigmas In College Students, Mary Jane O'Toole
Coming To A Full Stop: An Investigation Of Menstrual Period Stigmas In College Students, Mary Jane O'Toole
Electronic Theses and Dissertations
The focus of this study was to understand perceptions college students have regarding menstruation and if viewing a normalized media message may influence these perceptions. A treatment group of participants was randomly assigned to view an episode of the hit family sitcom Blackish that focused on menstruation and then answer survey questions. A control group of participants only answered the survey questions. A mixed methods analysis revealed three primary conclusions. First, these results contradict existing research in that the college students surveyed generally do not hold negative perceptions that may stigmatize menstruation. Second, the treatment that viewed the normalized media …
Organizational Legitimacy As Co-Created Value, Christina Maria Olsen
Organizational Legitimacy As Co-Created Value, Christina Maria Olsen
Electronic Theses and Dissertations
The purpose of this study is to explore how co-creational processes contribute to organizational legitimacy as a valuable outcome for organizations. 13 semi-structured in-depth interviews were conducted with digital communication professionals from a variety of organizations in the United States to better understand the use of social media platforms and perceptions of value from engaging with stakeholders in co-creation. Results showed that organizations engaged in co-creation of brand meaning via different methods such as referrals and feedback and that organizations reached different kinds of outcomes via these co-creational processes. These include being a resource for stakeholders, gaining brand advocates, reaching …
Learning Spaces Are Wac: Investigating How Classroom Space Design Influences Student Disciplinary Identities, Landon Berry
Learning Spaces Are Wac: Investigating How Classroom Space Design Influences Student Disciplinary Identities, Landon Berry
Electronic Theses and Dissertations
This dissertation used classroom observations, movement mapping, instructor interviews, and student focus groups to examine the ways in which both instructors and students navigated the classroom spaces they were assigned in upper-level, discipline-specific courses. By focusing on three diverse disciplines (writing and rhetoric, education, and chemistry), this dissertation makes arguments about how the design of classroom spaces (as well as the tools that are housed therein) support, facilitate, and detract from a student's ability to develop a disciplinary identity, which is defined here as the social and linguistic construction of a practitioner of a discipline that is shaped by the …
Work And Family Conflict: A Comparative Analysis Among Staff Nurses, Nurse Managers, And Nurse Executives, Amanda Raffenaud
Work And Family Conflict: A Comparative Analysis Among Staff Nurses, Nurse Managers, And Nurse Executives, Amanda Raffenaud
Electronic Theses and Dissertations
The nursing workforce increasingly faces issues that affect clinical and managerial practice. One such issue is work-family conflict (WFC) and family-work conflict (FWC). Nurses face role strain as they confront the pressures from often competing work-and-family roles. This study assessed WFC/FWC among varying nurse roles: staff nurses, managerial nurses, and nurse executives. A random sample of 5,000 nurses, generated from registered nurses practicing in the state of Florida, was surveyed for this research study. Nurses were surveyed on demographics, perceptions regarding the work environment, and perceptions of WFC/FWC. Descriptively, nurses experienced more work-family conflict than family-work conflict. Regression analyses and …
Assessing The Impact Of Meaningful Employment On The Self-Esteem Of Male Veterans, Gary Grimes
Assessing The Impact Of Meaningful Employment On The Self-Esteem Of Male Veterans, Gary Grimes
Electronic Theses and Dissertations
This dissertation examined the relationship between meaningful employment and self-esteem in male veterans. Meaningful employment is an important element of reintegration, the process all veterans go through to transition from active duty military service back into society. Reintegration involves three major areas: physical and mental health, employment, and family and friend relationships. A sample of 30 male veterans were interviewed. After the interviews, two instruments were used to further examine the variables (meaningful employment and self-esteem). The instruments were administered to measure the individual's perception regarding meaningful employment and level of self-esteem. The interviews were the primary focus, with the …
Post-Secondary Faculty Treatment Of Non-Native English-Speaking Student Writing Errors In Academic Subject Courses, Laura Monroe
Post-Secondary Faculty Treatment Of Non-Native English-Speaking Student Writing Errors In Academic Subject Courses, Laura Monroe
Electronic Theses and Dissertations
As more non-native English-speaking students enroll in English-medium universities, even more faculty will instruct students who are unprepared for the rigors of post-secondary academic writing in English. Many faculty members lack training and knowledge regarding the assessment of non-native English-speaking students' writing, as well as the ability to provide effective feedback. This quantitative study investigated the possible attitudinal factors, including demographics, which might affect faculty preparedness and grading practices for both native and non-native English-speaking students' academic writing and plagiarism, as well as the reasons faculty do not deduct points from both populations' writing errors. Structural equation modeling and SPSS …
Development And Validation Of A Scale To Measure Misconceptions About Educational Psychology Among Pre-Service Teachers, Morgan Mcafee
Development And Validation Of A Scale To Measure Misconceptions About Educational Psychology Among Pre-Service Teachers, Morgan Mcafee
Electronic Theses and Dissertations
Misconceptions are widespread or commonly held beliefs explicitly contradicted by empirical evidence. When teachers harbor misconceptions or unjustified beliefs about teaching, learning, and human motivation, the potential pedagogical consequences are profound, and these inaccurate beliefs may be instilled into future students through ineffective teaching strategies and gross misinterpretations of learning science. While existing research has examined misconceptions about general psychology and neuroscience among various populations, no prior work has evaluated pre-service teachers' misconceptions about topics of educational psychology, comprising inaccurate beliefs about teaching, learning, and human motivation. The purpose of this research is to describe the development and validation of …
Ignition Studies Of Oxy-Syngas/Co2 Mixtures Using Shock Tube For Cleaner Combustion Engines, Samuel Barak
Ignition Studies Of Oxy-Syngas/Co2 Mixtures Using Shock Tube For Cleaner Combustion Engines, Samuel Barak
Electronic Theses and Dissertations
In this study, syngas combustion was investigated behind reflected shock waves in order to gain insight into the behavior of ignition delay times and effects of the CO2 dilution. Pressure and light emissions time-histories measurements were taken at a 2 cm axial location away from the end wall. High-speed visualization of the experiments from the end wall was also conducted. Oxy-syngas mixtures that were tested in the shock tube were diluted with CO2 fractions ranging from 60% - 85% by volume. A 10% fuel concentration was consistently used throughout the experiments. This study looked at the effects of changing the …
Characterization, Classification, And Genesis Of Seismocardiographic Signals, Amirtaha Taebi
Characterization, Classification, And Genesis Of Seismocardiographic Signals, Amirtaha Taebi
Electronic Theses and Dissertations
Seismocardiographic (SCG) signals are the acoustic and vibration induced by cardiac activity measured non-invasively at the chest surface. These signals may offer a method for diagnosing and monitoring heart function. Successful classification of SCG signals in health and disease depends on accurate signal characterization and feature extraction. In this study, SCG signal features were extracted in the time, frequency, and time-frequency domains. Different methods for estimating time-frequency features of SCG were investigated. Results suggested that the polynomial chirplet transform outperformed wavelet and short time Fourier transforms. Many factors may contribute to increasing intrasubject SCG variability including subject posture and respiratory …
Determining The Small-Scale Structure And Particle Properties In Saturn's Rings From Stellar And Radio Occultations, Richard Jerousek
Determining The Small-Scale Structure And Particle Properties In Saturn's Rings From Stellar And Radio Occultations, Richard Jerousek
Electronic Theses and Dissertations
Saturn's rings consist of icy particles of various sizes ranging from millimeters to several meters. Particles may aggregate into ephemeral elongated clumps known as self-gravity wakes in regions where the surface mass density and epicyclic frequency give a Toomre critical wavelength which is much larger than the largest individual particles (Julian and Toomre 1966). Optical depth measurements at different wavelengths can be used to constrain the sizes of individual particles (Zebker et al. 1985, Marouf et al. 1983) while measurements of optical depths spanning many viewing geometries can be used to determine the properties of self-gravity wakes (Colwell et al. …