Digital Commons Network^™

Finding The Right Fit: Multiculturalism And Low-Income Urban Schools, Grace Shin Won Kim Canada

Theses and Dissertations

This study addressed the difficulty of recruiting and retaining qualified teachers by examining the qualities and characteristics of teacher fit in a group of Southern California charter schools that serve low-income Black and Hispanic students. Given the significance and importance of culturally relevant and responsive education in schools that serve primarily Black and Hispanic students (Castagno, 2009; Gay, 2000; Howard, 2003; Ladson-Billings, 1994; 1995; 2006; Lindsey, Karns, & Myatt 2010; Nieto, 2005a; Poveda & Martin, 2004), three survey instruments; a demographic questionnaire, the Teachers Multicultural Attitudes Survey (TMAS), and the Multicultural Teaching Competency Scale (MTCS); were used to assess teacher …

Implementations Of Technology Enhanced Personalized Learning: Exploration Of Success Criteria, Concerns, And Characteristics, Rodney P. Gallagher

Theses and Dissertations

Many school districts across the United States are spending large amounts of financial and employee resources on the implementation of technology enhanced personalized learning (TEPL) tools. There is little empirical understanding of the success, concerns, and characteristics of TEPL implementations and the learning environments they enable. This exploratory study used a qualitative descriptive methodology to survey and interview TEPL administrators in an effort to understand their perspectives on TEPL characteristics, definitions of success, concerns, and a general description of how TEPL tools are implemented in their learning environments. Along with confirming six characteristics previously identified (dual role of the teacher, …

Teachers' Beliefs About Creativity In The Elementary Classroom, Dina Aish

Theses and Dissertations

Creativity is considered to be an essential life skill that should be fostered throughout the educational system. However, public elementary school classrooms in the USA generally do not appear to be creativity-fostering places. A better understanding of teachers' beliefs about creativity would provide valuable insights into their practices in the classroom and facilitate the planning and evaluation efforts to foster creativity in all classrooms. Using a validated survey instrument, adapted from the Teachers' Conceptions of Creativity Questionnaire (TCCQ), the researcher collected beliefs from 120 public elementary school teachers from six schools within one mid-sized public unified school district in the …

Views Of Student Engagement Among Students And Faculty In Online Courses, Amy Elizabeth Berger

Theses and Dissertations

As part of an effort to learn more about the technologies currently available to students, three executives in the online division of a private, not-for-profit four-year university requested a survey of students and faculty to learn more about the technologies to which they currently have access. Additionally, each of three executives wanted to better understand student and faculty views of student engagement in the division's online courses. To that end, research-based questions about student engagement levels were added to a survey about access to technology. This mixed-method non-experimental study collected data from students and faculty about which definition of student …

Recognition And Response: Early Literacy In An Inclusion-Based Preschool Program, Irene Gonzalez-Castillo

Theses and Dissertations

The purpose of this case study was to investigate and describe Recognition & Response (R & R) practices, a model of early literacy Response to Intervention, utilized by multidisciplinary staff teams in a purposively selected, inclusion-based preschool program in Southern California. Investigated R & R practices included: (a) recognition of student needs through assessment, (b) collaborative problem-solving as a process to plan and evaluate next steps for students, and (c) response through a multi-tiered instructional approach. The researcher utilized a qualitative case study design. The single district preschool program selected is comprised of ten inclusion-based classrooms located on two elementary …

Emotional Intelligence And Racial Identity's Impact On Academic Achievement In American Multiracial High School Students, Mary Ann Freeman

Theses and Dissertations

Minorities reached 50.4% of the American population, representing a majority for the first time, and those self-reporting as multiracial grew by a larger percentage than those reporting a single race (U.S. Census Bureau, 2011). Millennials born after 1980 are the most racially diverse generation (Pew Research Center, 2014). This study investigated how racial identity and emotional intelligence might impact academic achievement among U.S. Millennial multiracial adolescents of African descent. Research suggests a student's racial identification has a significant impact on academic performance (Herman, 2009) and minority youth struggle academically (Annie E. Casey Foundation, 2014). The theoretical framework included the construct …

Leading Under Pressure, Coping Practices Of Executives: A Mixed Methods Study, Darlene Thomas

Theses and Dissertations

Work-related stress continues is the largest contributor to the rise in insurance cost for most organizations (Dewe, O'Driscoll, & Cooper, 2010). The biopharmaceutical industry is no exception. Today's leaders must focus on efficiencies, cost reduction, and organization performance while restructuring the organization to do more with less, which can create tremendous stress. This research explored coping strategies practiced by executive leaders in the biopharmaceutical industry. The overarching research question was: How do senior leaders confronted by work pressure attempt to cope, and are the coping strategies practiced effective at reducing and deflecting stress in a way that doesn't adversely affect …

Staffing Practices Of Elementary School Principals For Teachers In Primary Grades And Implications For The Prek-3rd Continuum, Laura Albers-Biddle

Electronic Theses and Dissertations

Principals are considered the educational leaders of their schools and face pressure to improve the quality of education across all levels and disciplines. Principals were interviewed to understand their beliefs, knowledge, and dispositions on staffing teachers in the primary grades. A purposive sample of elementary school principals was drawn from one mid-size suburban district in Florida. Data were analyzed using Bolman and Deal's four-frame organizational theory framework, Cohen's cognitive frame, and Boote's theory of professional discretion. The data strongly suggest that principals do not understand the foundations of early childhood practice. In addition, they do not understand the differences between …

Teachers' Utilization Of Field Trips: A Comparative Study, Joshua Kenna

Electronic Theses and Dissertations

Field trips are visits to an out-of-school setting designed for educational and academic purposes whereby as a result students gain firsthand knowledge and experiences. Historically, it was the potential for student learning that motivated teachers to utilize field trips. However, there is reasonable suspicion among scholars today that teachers are utilizing field trips less since the start of the new millennia; the common reasons being cited among others include a slumping economy, an increase in accountability due to high-stakes testing, and rising fuel costs. Unfortunately, there is no empirical evidence that can confirm or deny this suspicion. Therefore, the purpose …

The Impact Of Computer-Assisted Instruction On Ninth- And Tenth-Grade Students, Melanie Mcneely

Electronic Theses and Dissertations

With over 60 years of education reform, including the National Defense Education Act (NDEA) in 1958, Individuals with Disabilities Education Act (IDEA) in 1975, and No Child Left Behind (NCLB) in 2002, the achievement gap still existed at the beginning of the 21st century, and the effectiveness of the U. S. public school system continued to be questioned. This study was conducted to examine the effect of the use of a computer-assisted instruction curriculum, Achieve 3000, among select secondary reading students in a central Florida school district and their implications for student achievement. This study showed significant difference existed in …

Supporting Middle School Students With Emotional Or Behavioral Disorders In Blended Learning: A Fraction Intervention Using Virtual Manipulatives, Barbara Serianni

Electronic Theses and Dissertations

Students with emotional or behavioral disorders (EBD) are more likely than other students with disabilities to drop out of school (Blackorby & Wagner, 1996) and suffer societal consequences that include higher probabilities and rates of incarceration, poverty, drug abuse, homelessness, low wages, and unemployment (Bradley, Doolittle, & Bartolotta, 2008; Wagner, 1995). High school graduation is a critical factor to improve post-secondary outcomes for students with EBD; yet it is often mathematics, specifically algebra, that stands in the way of graduation (Blackorby & Wagner). Students with EBD often enter middle school lacking foundational mathematics skills, such as fractions, which sets them …

Semiconductor Laser Based On Thermoelectrophotonics, Xiaohang Liu

Electronic Theses and Dissertations

This dissertation presents to our knowledge the first demonstration of a quantum well (QW) laser monolithically integrated with internal optical pump based on a light emitting diode (LED). The LED with high efficiency is operated in a thermoelectrophotonic (TEP) regime for which it can absorb both its own emitted light and heat. The LED optical pump can reduce internal optical loss in the QW laser, and enables monolithically integrated TEP heat pumps to the semiconductor laser. The design, growth and fabrication processes of the laser chip are discussed, and its experimental data is presented. In order to further increase the …

On-Chip Optical Stabilization Of High-Speed Mode-Locked Quantum Dot Lasers For Next Generation Optical Networks, Abhijeet Ardey

Electronic Theses and Dissertations

Monolithic passively mode-locked colliding pulse semiconductor lasers generating pico- to sub-picosecond terahertz optical pulse trains are promising sources for future applications in ultra-high speed data transmission systems and optical measurements. However, in the absence of external synchronization, these passively mode-locked lasers suffer from large amplitude and timing jitter instabilities resulting in broad comb linewidths, which precludes many applications in the field of coherent communications and signal processing where a much narrower frequency line set is needed. In this dissertation, a novel quantum dot based coupled cavity laser is presented, where for the first time, four-wave mixing (FWM) in the monolithically …

Novel Developments On The Extraction And Analysis Of Polycyclic Aromatic Hydrocarbons In Environmental Samples, Walter Wilson

Electronic Theses and Dissertations

This dissertation focuses on the development of analytical methodology for the analysis of polycyclic aromatic hydrocarbons (PAHs) in water samples. Chemical analysis of PAHs is of great environmental and toxicological importance. Many of them are highly suspect as etiological agents in human cancer. Among the hundreds of PAHs present in the environment, the U.S. Environmental Protection Agency (EPA) lists sixteen as "Consent Decree" priority pollutants. Their routine monitoring in environmental samples is recommended to prevent human contamination risks. A primary route of human exposure to PAHs is the ingestion of contaminated water. The rather low PAH concentrations in water samples …

Novel Properties Of Ferromagnetic P-Wave Superconductors, Christopher Lorscher

Electronic Theses and Dissertations

This thesis investigates the many extraordinary physical properties of the candidate p-wave ferromagnetic superconductors UCoGe and URhGe, and proposes theoretical predictions for p-wave superconductors yet to be discovered. In particular, we carry out angular dependent quantum field theoretical calculations of the thermodynamic H - T phase diagram known as the upper critical field, or more appropriately for ferromagnetic superconductors the upper critical induction, for various p-wave superconducting order parameter symmetries including: The axial Anderson-Brinkman-Morel(ABM) state, the chiral Scharnberg-Klemm (SK) state, and the completely broken symmetry polar state (CBS), as well as for some other states with partially broken symmetry (PBS) …

Meeting The Needs Of Students Through A Targeted Professional Development, Anthony Copelin

Electronic Theses and Dissertations

This study presents a complex problem of practice occurring at Primrose Elementary school [pseudonym]. A large portion of Primrose Elementary School's population has been unable to meet Florida's state reading proficiency standards over the last twelve years. Students of Primrose Elementary have a poor foundation in language on which to build vital reading skills. Consequently, students cannot overcome this deficiency because teachers lack the content knowledge to meet the students' language and subsequent reading deficiencies, in spite of 12 years of reading professional development. This dissertation in practice will propose the use of targeted professional development to address below grade …

The Role Of Invitational Theory On Minority Student Enrollment In Advanced Placement Courses, Jason Mcdonald

Electronic Theses and Dissertations

The number of students enrolling in Advanced Placement (AP) classes has been increasing in Florida and across the nation over the last decade. However, this trend is not happening for traditionally underserved groups of students such as African Americans, Hispanics, and students from low socioeconomic backgrounds. These minority groups are underrepresented in AP classes, while Asian and White students are overrepresented. This trend is alarming because there are qualified minority students who have a great chance of being successful in AP classes according to AP Potential data. For some reason though, these qualified minority and low income students are nevertheless …

Photo-Induced Protonation Of Polyaniline Composites And Mechanistic Study Of The Degradation Of Polychlorinated Biphenyls With Zero-Valent Magnesium, Candace Kirkland

Electronic Theses and Dissertations

As technology advances, a need for non-metal, conductive materials has arisen for several types of applications. Lithographic techniques are helpful to develop some of these applications. Such techniques require materials that are insulating and become conductive after irradiated. Composites of polyaniline in its emeraldine base form (PANI-EB) doped with photo-acid generators (PAG) become conductive upon photo-irradiation. This increase in conductivity is due to the protonation of PANI-EB. Such materials may be utilized to fabricate conducting patterns by photo-irradiation; however, the conductivity obtained by direct irradiation of PANI-EB/PAG composites is normally quite low (<10-3 S/cm) due to aggregation of highly loaded PAG. In this work, poly(ethylene glycol) (PEG), a proton transfer polymer, was added to PANI-EB/PAG. Results showed the addition of low molecular weight (MW) (550) PEG significantly enhanced the photo-induced conductivity to a level comparable to that of PANI-salt synthesized by oxidizing aniline in the presence of an acid. High MW (8000) PEG is less effective than PEG 550, and composites of PANI-EB and N-PEG-PANI showed conductivity as high as 102 S/cm after treatment with HCl vapor. The photo-induced conductivity of the N-PEG-PANI/PANI-EB/PAG composite reached 10-2-10-1 S/cm. Polychlorinated biphenyls (PCBs) are a class of chemicals with 209 different congeners, some of which are known carcinogens, and are persistent organic pollutants in the environment. After its synthesis, it was seen as a phenomenal additive in a multitude of different applications leading to the wide spread use of PCBs and a need for a safe, effective, and inexpensive remediation technique. While it is known that magnesium can degrade PCBs, the mechanism of this reaction was not well-understood. In order for magnesium to be broadly used as a remediation tool, it is necessary to fully understand how the reaction is taking place and if the PCBs are able to be fully dechlorinated into biphenyl. This research focuses on the hydrodechlorination of PCBs with zero-valent magnesium in acidified ethanol. The degradation pathways of 2, 2', 3, 5, 5', 6- hexachlorobiphenyl were investigated to determine the identity of the daughter PCBs produced, how and if they continue to be dechlorinated into biphenyl. The proton source for this hydrodehalogenation reaction was also studied using both deuterated solvent and acid to give more detail to the mechanism of this reaction.

The Effect Of Habitat For Humanity Homeownership On Student Attendance And Standardized Test Scores In Orange County Florida School District, Charles Harris

Electronic Theses and Dissertations

The mobility of low-income students who do not have access to stable housing creates numerous challenges both at home and in school. Among these challenges, academic performance certainly is one of the most important. The lack of a more permanent, familiar, and safe environment is presumed to impact home life as well as students' performance in the classroom. This research compares two groups of current and former students of Orange County Public Schools (OCPS) in Florida (1) children of families who are Habitat for Humanity (HFH) homeowners, and (2) a matched socioeconomic control group. The HFH program is designed to …

Optical And Magnetic Properties Of Nanostructures, Neha Nayyar

Electronic Theses and Dissertations

In this thesis, Density Functional Theory and Time-Dependent Density-Functional Theory approaches are applied to study the optical and magnetic properties of several types of nanostructures. In studies of the optical properties we mainly focused on the plasmonic and excitonic effects in pure and transition metal-doped noble metal nanochains and their conglomerates. In the case of pure noble metal chains, it was found that the (collective) plasmon mode is pronounceable when the number of atoms in the chain is larger than 5. The plasmon energy decreases with further with increasing number of atoms (N) and is almost N-independent when N is …

Multiple-Case Study And Exploratory Analysis Of The Implementation Of Value-Added Teacher Performance Assessment On Eighth Grade Student Achievement In Ohio, Pennsylvania, And Tennessee, James Carter

Electronic Theses and Dissertations

The goal of this research was to analyze the academic impact of the implementation of the Value Added Assessment Model. The researcher analyzed the Value Added Assessment Models in the three Value Added Assessment Model states that had implemented the Value Added Assessment Model for more than five years. Additionally, the research was done by analyzing the academic impact as measured by the eighth grade reading NAEP and the eighth grade mathematics NAEP. The researcher paired the three states that had implemented Value Added Assessment Model for more than five years, with three demographically matched states that had not implemented …

Modeling Risk For Sexually Transmitted Infections In Women In A Court-Ordered Substance Treatment Program, Frances Deavers

Electronic Theses and Dissertations

Developing a comprehensive model of Sexually Transmitted Infection (STI) risk factors and their inter-relationships is vital to improving methods of risk identification and treatment delivery. The CDC posed three general categories that may serve as a framework for such a model: sexual network, individual behavior, and social/ structural risk. None of the extant risk models incorporate measures from all three categories. Additionally, none of these models, generally focused on individual behavior, use medical data on infection as their outcome variable. This is problematic because the ultimate outcome of infection is also influenced by sexual network and social/ structural variables, in …

Talking Back: Mathematics Teachers Supporting Students' Engagement In A Common Core Standard For Mathematical Practice: A Case Study, Mercedes Sotillo Turner

Electronic Theses and Dissertations

The researcher in this case study sought to determine the ways in which teachers support their students to create viable arguments and critique the reasoning of others (SMP3). In order to achieve this goal, the self-conceived classroom roles of two teachers, one experienced and one novice, were elicited and then compared to their actualized roles observed in the classroom. Both teachers were provided with professional development focused on supporting student engagement in SMP3. This professional development was informed by the guidelines that describe the behaviors students should exhibit as they are engaged in the standards for mathematical practice contained in …

Multimaterial Fibers In Photonics And Nanotechnology, Guangming Tao

Electronic Theses and Dissertations

Recent progress in combing multiple materials with distinct optical, electronic, and thermomechanical properties monolithically in a kilometer-long fiber drawn from a preform offers unique multifunctionality at a low cost. A wide range of unique in-fiber devices have been developed in fiber form-factor using this strategy. Here, I summary my recent results in this nascent field of 'multimaterial fibers'. I will focus on my achievements in producing robust infrared optical fibers and in appropriating optical fiber production technology for applications in nanofabrication. The development of optical components suitable for the infrared (IR) is crucial for applications in this spectral range to …

Laser Filamentation - Beyond Self-Focusing And Plasma Defocusing, Khan Lim

Electronic Theses and Dissertations

Laser filamentation is a highly complex and dynamic nonlinear process that is sensitive to many physical parameters. The basic properties that define a filament consist of (i) a narrow, high intensity core that persists for distances much greater than the Rayleigh distance, (ii) a low density plasma channel existing within the filament core, and (iii) a supercontinuum generated over the course of filamentation. However, there remain many questions pertaining to how these basic properties are affected by changes in the conditions in which the filaments are formed; that is the premise of the work presented in this dissertation. To examine …

Structural And Functional Studies Of Glycine Riboswitches And Development Of Fab Chaperone Assisted Rna Crystallography, Eileen Sherman

Electronic Theses and Dissertations

The glycine riboswitch is a structured RNA found upstream of genes in mRNA transcripts in many bacteria, functioning as a biofeedback gene regulator. Upon binding glycine, a complete RNA transcript including gene sequences is transcribed, effectively turning on gene expression. In an effort to understand the intricacies of its functioning, many mutants of the riboswitch were made and characterized during Ph. D. work, resulting in discovery of a P0 duplex/kink-turn motif involving a few nucleotides upstream of the established glycine riboswitch sequence which changed its ligand binding characteristics (Chapter 1). Previously, the two aptamers of the riboswitch were thought to …

Is There A Distinction Between A Priori And A Posteriori, Hiu Man Chan

Lingnan Theses

This thesis studies whether there is a tenable distinction between a priori justification and a posteriori justification.

My research considers three possible conceptions of a priori: (1) Justification Independent of Experience, (2) Mere Meaning Based Justification and (3) Justification by Rational Insight, and examines whether they can provide a sound and significant distinction between a priori and a posteriori.

This thesis contains five chapters. Chapter 1 introduces the background knowledge of the a priori/a posteriori distinction. Chapter 2 analyzes the traditional conception of a priori, i.e. justification independent of experience, and considers whether the distinction based on it is tenable. …

Ar Physics: Transforming Physics Diagrammatic Representations On Paper Into Interactive Simulations., Yao Zhou

Electronic Theses and Dissertations

A problem representation is a cognitive structure created by the solver in correspondence to the problem. Sketching representative diagrams in the domain of physics encourages a problem solving strategy that starts from 'envisionment' by which one internally simulates the physical events and predicts outcomes. Research studies also show that sketching representative diagrams improves learner's performance in solving physics problems. The pedagogic benefits of sketching representations on paper make this traditional learning strategy remain pivotal and worthwhile to be preserved and integrated into the current digital learning landscape. In this paper, I describe AR Physics, an Augmented Reality based application that …

An Examination Of Job Analysis: Developing Interdisciplinary Strategies In Human Resource Management Facilitative Of Mitigating Propensities Of Teacher Attrition, Julio Devere

Electronic Theses and Dissertations

Despite repeated attempts by school administrators, policymakers and researchers to diagnose and correct rising occurrences of teacher turnover, there has been little change in the actual efforts to retain teachers in academy organizations. In response, this study was conducted to describe process constraints within the academy organization that are responsible for managing teacher turnover. To provide a description of current teacher retention efforts by school administrators, a survey instrument was administered to school teachers in the State of Florida. The population sample was dispersed throughout the entire state and closely reflected the demographics of Florida school teachers. The survey addressed …

How Many Are Out There? A Novel Approach For Open And Closed Systems, Zia Rehman

Electronic Theses and Dissertations

We propose a ratio estimator to determine population estimates using capture-recapture sampling. It's different than traditional approaches in the following ways: (1) Ordering of recaptures: Currently data sets do not take into account the "ordering" of the recaptures, although this crucial information is available to them at no cost. (2) Dependence of trials and cluster sampling: Our model explicitly considers trials to be dependent and improves existing literature which assumes independence. (3) Rate of convergence: The percentage sampled has an inverse relationship with population size, for a chosen degree of accuracy. (4) Asymptotic Attainment of Minimum Variance (Open Systems: (=population …