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2016

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Setting The Agenda For Stem Literacy In Higher Education: A Content Analysis Of The Chronicle Of Higher Education, Maya Abdallah Jan 2016

Setting The Agenda For Stem Literacy In Higher Education: A Content Analysis Of The Chronicle Of Higher Education, Maya Abdallah

Electronic Theses and Dissertations

Enhancing achievement in Science, Technology, Engineering, and Mathematics (STEM) is a long-standing national concern. The current national agenda, to instill an "all hands on deck" approach to creating a STEM literate citizenry, calls for broadening the scope of inclusion in STEM efforts. A critical population, higher education administrators, faculty, and staff are a valuable resource to advancing this agenda. Under the proposed Agenda Setting Communication Theory (ASCT) model developed for this study, their level of exposure to needed information is an important indicator of their potential participation in this agenda. As the leading news medium for the higher education community, …

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Sensing Using Specialty Optical Fibers, Amy Van Newkirk Jan 2016

Sensing Using Specialty Optical Fibers, Amy Van Newkirk

Electronic Theses and Dissertations

Fiber optic based sensing is a growing field with many applications in civil and aerospace engineering, oil and gas industries, and particularly in harsh environments where electronics are not able to function. Optical fibers can be easily integrated into structures, are immune to electromagnetic interference, can be interrogated from remote distances, and can be multiplexed for distributed measurements. Because of these properties, specialty fiber designs and devices are being explored for sensing temperature, strain, pressure, curvature, refractive index, and more. Here we show a detailed analysis of a multicore fiber (MCF) for sensing, including its design and optimization in simulation, …

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Size, Shape, Composition And Chemical State Effects In Nanocatalysis, Mahdi Ahmadi Jan 2016

Size, Shape, Composition And Chemical State Effects In Nanocatalysis, Mahdi Ahmadi

Electronic Theses and Dissertations

The field of nanocatalysis has gained significant attention in the last decades due to the numerous industrial applications of nanosized catalysts. Size, shape, structure, and composition of the nanoparticles (NPs) are the parameters that can affect the reactivity, selectivity and stability of nanocatalysts. Therefore, understanding how these parameters affect the catalytic properties of these systems is required in order to engineer them with a given desired performance. It is also important to gain insight into the structural evolution of the NP catalysts under different reaction conditions to design catalysts with long durability under reaction condition. In this dissertation a synergistic …

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Investigating The Predictive Power Of Student Characteristics On Success In Studio-Mode, Algebra-Based Introductory Physics Courses, Jarrad Pond Jan 2016

Investigating The Predictive Power Of Student Characteristics On Success In Studio-Mode, Algebra-Based Introductory Physics Courses, Jarrad Pond

Electronic Theses and Dissertations

As part of a project to explore the differential success of similar implementations of the studio-mode of physics instruction, the objective of this work is to investigate the characteristics of students enrolled in algebra-based, studio-mode introductory physics courses at various universities in order to evaluate what effects these characteristics have on different measures of student success, such as gains in conceptual knowledge, shifts to more favorable attitudes toward physics, and final course grades. In my analysis, I explore the strategic self-regulatory, motivational, and demographic characteristics of students in algebra-based, studio-mode physics courses at three universities: the University of Central Florida …

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An Inconclusive Truth: An Evaluation Of Speleothem Evidence For Climate Change As A Driver Of Ancient Maya Culture Change, Benjamin Goldblatt Jan 2016

An Inconclusive Truth: An Evaluation Of Speleothem Evidence For Climate Change As A Driver Of Ancient Maya Culture Change, Benjamin Goldblatt

Electronic Theses and Dissertations

As anthropologists who focus their scholarly attention on the past, archaeologists are interested in examining past changes in human cultures, which can include investigating the role(s) of climatic conditions in shaping them. Paleoclimatology offers the possibility of reconstructing past climates and demonstrating their variability over time, potentially contributing a great deal to archaeology. However, while paleoclimatology may lead to new discoveries about the human past, it may also lead to new errors in interpreting it. Cave speleothems are sources of paleoclimatic data that have recently attracted attention in Mesoamerican archaeology, particularly in studies of the Maya region. In order to …

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Don't Let The World Rot: Anarchism, Hardcore Music, And Counterculture, Pearson Bolt Jan 2016

Don't Let The World Rot: Anarchism, Hardcore Music, And Counterculture, Pearson Bolt

Electronic Theses and Dissertations

Hardcore music is intrinsically anarchistic. The hardcore music scene represents a radical departure from contemporary society. Rejecting the materialism, militarism, and hedonism of the mainstream music scene—and, by extension, modern culture—hardcore music presents an alternative lifestyle rooted in solidarity, equality, and liberty. Indeed, the culture of the hardcore scene approaches a transitive, nomadic model of an anarchistic commune built on resistance as a way of life. In this study, I identified the ways music and lyrics craft attitudes and environments for revolt and rebellion, cultivating critical thinking and disobedience in equal measures. In order to understand the hardcore community, I …

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Interval Edge-Colorings Of Graphs, Austin Foster Jan 2016

Interval Edge-Colorings Of Graphs, Austin Foster

Electronic Theses and Dissertations

A proper edge-coloring of a graph G by positive integers is called an interval edge-coloring if the colors assigned to the edges incident to any vertex in G are consecutive (i.e., those colors form an interval of integers). The notion of interval edge-colorings was first introduced by Asratian and Kamalian in 1987, motivated by the problem of finding compact school timetables. In 1992, Hansen described another scenario using interval edge-colorings to schedule parent-teacher conferences so that every person's conferences occur in consecutive slots. A solution exists if and only if the bipartite graph with vertices for parents and teachers, and …

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Access And Student Success: An Examination Of The Perceptions And Experiences Of First-Year Seminar Professionals At Florida Historically Black Colleges And Universities., Amanda Wilkerson Jan 2016

Access And Student Success: An Examination Of The Perceptions And Experiences Of First-Year Seminar Professionals At Florida Historically Black Colleges And Universities., Amanda Wilkerson

Electronic Theses and Dissertations

The focus of this research was to understand the lived experiences and working perceptions of Florida HBCU first-year seminar professionals. Much empirical work has been done to examine the experiences of students transitioning into the college environment. In contrast, there is little work that specifically looks at the professionals that service first-year students within a minority serving context, specifically Historically Black Colleges and Universities. As a result, the findings of this study suggest that Florida HBCU first-year seminar professionals are active partners in the scholastic success of its freshman students.

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The Source And Impact Of Student Engagement For Black Students In An Urban High School, Deshawn Sims Jan 2016

The Source And Impact Of Student Engagement For Black Students In An Urban High School, Deshawn Sims

Electronic Theses and Dissertations

The achievement of Black students has repeatedly met only the lowest standards of performance on standardized assessments, which begs the question; do American schools have the capacity to educate Black children? The purpose of this action research manuscript dissertation was to explore the teacher behaviors and instructional strategies that developed a culture of high achievement among Black students as measured by student engagement and discourse, immediately before and after desegregation, and in classrooms today. The examination of popular theories concerning the education of Black people in the early 1900's and narratives of individuals who attended segregated schools, provided a historical …

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The Impact Of Voluntary Prekindergarten On Kindergarten Reading Readiness In A Large Suburban School District In 2012-2014, Brandon Hanshaw Jan 2016

The Impact Of Voluntary Prekindergarten On Kindergarten Reading Readiness In A Large Suburban School District In 2012-2014, Brandon Hanshaw

Electronic Theses and Dissertations

The purpose of this study was to determine whether the effects of participation in the Florida Voluntary Prekindergarten Program are sustained in kindergarten reading readiness for those who participated in the research school district VPK, those who participated in another provider VPK, and compared to those who did not participate in VPK. Select stakeholder perceptions were also gathered and analyzed, to include research school district parents of VPK participants, research school district VPK instructors, and research school district administrators. Academic effects were analyzed for VPK participants and non-VPK participants in 2012-2013 within their kindergarten 2013-2014 school year using the FAIR-K …

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Electrical Parasitic Bandwidth Limitations Of Oxide-Free Lithographic Vertical-Cavity Surface-Emitting Lasers, Xu Yang Jan 2016

Electrical Parasitic Bandwidth Limitations Of Oxide-Free Lithographic Vertical-Cavity Surface-Emitting Lasers, Xu Yang

Electronic Theses and Dissertations

Nowadays, Vertical-Cavity Surface-Emitting Lasers (VCSELs) are the most popular optical sources in short-reach data communications. In the commercial oxide VCSEL technology, an oxide aperture is created inside resonant cavity in realizing good mode and current confinement, however, high electrical resistance comes along with forming the oxide aperture and the electrical parasitic bandwidth becomes the main limitation in modulation speed. In this report, electrical bandwidths of oxide-free lithographic VCSELs have been studied along with their general lasing properties. Due to the new ways of fabricating the aperture, record low resistances have been achieved in oxide-free lithographic VCSELs with various sizes, while …

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Comparing The Variational Approximation And Exact Solutions Of The Straight Unstaggered And Twisted Staggered Discrete Solitons, Daniel Marulanda Jan 2016

Comparing The Variational Approximation And Exact Solutions Of The Straight Unstaggered And Twisted Staggered Discrete Solitons, Daniel Marulanda

Electronic Theses and Dissertations

Discrete nonlinear Schrödinger equations (DNSL) have been used to provide models of a variety of physical settings. An application of DNSL equations is provided by Bose-Einstein condensates which are trapped in deep optical-lattice potentials. These potentials effectively splits the condensate into a set of droplets held in local potential wells, which are linearly coupled across the potential barriers between them [3]. In previous works, DNLS systems have also been used for symmetric on-site-centered solitons [11]. A few works have constructed different discrete solitons via the variational approximation (VA) and have explored their regions for their solutions [11, 12]. Exact solutions …

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Ready Or Not, Here Comes College: A Comparative Correlation Study Of College Readiness In Black And Hispanic Students Who Take Advanced Level Classes., Nigel Pillay Jan 2016

Ready Or Not, Here Comes College: A Comparative Correlation Study Of College Readiness In Black And Hispanic Students Who Take Advanced Level Classes., Nigel Pillay

Electronic Theses and Dissertations

The purpose of this study was to investigate how participation in advanced level courses impacts college readiness in students of color, specifically Black and Hispanic students. High school students have a variety of advanced level classes to choose from, including but not limited to: Advanced Placement (AP), International Baccalaureate (IB), Dual Enrollment (DE), Advanced International Certificate of Education (AICE) and Advancement via Individual Determination (AVID) classes. These types of advanced classes not only prepare students for college but also allow them to earn college credit through participation in courses of college level rigor while still in high school. However, the …

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A Correlational Study Of Emerging Modalities Of Developmental Education And Learning Styles In A Florida State College., John Britt Jan 2016

A Correlational Study Of Emerging Modalities Of Developmental Education And Learning Styles In A Florida State College., John Britt

Electronic Theses and Dissertations

Developmental education course modalities in Florida were drastically changed in 2013 with the passage of Senate Bill 1720. These courses can no longer be offered in a traditional 16-week format as other postsecondary courses are offered. Developmental education courses must now be offered in a compressed, contextualized, or corequisite instruction modality; or direct enrollment into a gateway course (1720-Education, 2013). This changes the student's experience in the courses. This research was framed by Kolb's experiential learning theory, which states that people learn through their experiences (Kolb, 1984). Chi-Square correlational tests were conducted to examine the relationship between students' learning types …

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Classification Of Silicone-Based Personal And Condom Lubricants Using Dart-Tofms, Lauren Harvey Jan 2016

Classification Of Silicone-Based Personal And Condom Lubricants Using Dart-Tofms, Lauren Harvey

Electronic Theses and Dissertations

Sexual lubricants are used to enable sexual encounters. There are different types of sexual lubricants such as water-based, oil-based, and silicone-based. They come pre-applied to condoms and separately in bottles as personal lubricants. Although sexual lubricants are intended for consensual use, they are also unfortunately used during the commission of sexual assaults. The analysis of sexual lubricants facilitates sexual assault investigations. With the increased usage of condoms in sexual assault cases, the potential of collected DNA evidence in each case is reduced. In the absence of biological evidence, the presence of sexual lubricants after a sexual assault can provide an …

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Computational Study Of Traveling Wave Solutions And Global Stability Of Predator-Prey Models, Yi Zhu Jan 2016

Computational Study Of Traveling Wave Solutions And Global Stability Of Predator-Prey Models, Yi Zhu

Electronic Theses and Dissertations

In this thesis, we study two types of reaction-diffusion systems which have direct applications in understanding wide range of phenomena in chemical reaction, biological pattern formation and theoretical ecology. The first part of this thesis is on propagating traveling waves in a class of reaction-diffusion systems which model isothermal autocatalytic chemical reactions as well as microbial growth and competition in a flow reactor. In the context of isothermal autocatalytic systems, two different cases will be studied. The first is autocatalytic chemical reaction of order $m$ without decay. The second is chemical reaction of order $m$ with a decay of order …

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Improved Interpolation In Sph In Cases Of Less Smooth Flow, Oddny Brun Jan 2016

Improved Interpolation In Sph In Cases Of Less Smooth Flow, Oddny Brun

Electronic Theses and Dissertations

We introduced a method presented in Information Field Theory (IFT) [Abramovich et al., 2007] to improve interpolation in Smoothed Particle Hydrodynamics (SPH) in cases of less smooth flow. The method makes use of wavelet theory combined with B-splines for interpolation. The idea is to identify any jumps a function may have and then reconstruct the smoother segments between the jumps. The results of our work demonstrated superior capability when compared to a particular challenging SPH application, to better conserve jumps and more accurately interpolate the smoother segments of the function. The results of our work also demonstrated increased computational efficiency …

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Hybrid Integrated Photonic Platforms And Devices, Jeffrey Chiles Jan 2016

Hybrid Integrated Photonic Platforms And Devices, Jeffrey Chiles

Electronic Theses and Dissertations

Integrated photonics has the potential to revolutionize optical systems by achieving drastic reductions in their size, weight and power. Remote spectroscopy, free-space communications and high-speed telecommunications are critical applications that would benefit directly from these advancements. However, many such applications require extremely wide spectral bandwidths, leading to significant challenges in their integration. The choice of integrated platform influences the optical transparency and functionality which can be ultimately achieved. In this work, several new platforms and technologies have been developed to meet these needs. First, the silicon-on-lithium-niobate (SiLN) platform is discussed, on which the first compact, integrated electro-optic modulator in the …

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Monolithically Integrated Inp-Based Unidirectional Circulators Utilizing Non-Hermiticity And Nonlinearity, Parinaz Aleahmad Jan 2016

Monolithically Integrated Inp-Based Unidirectional Circulators Utilizing Non-Hermiticity And Nonlinearity, Parinaz Aleahmad

Electronic Theses and Dissertations

The need to integrate critical optical components on a single chip has been an ongoing quest in both optoelectronics and optical communication systems. Among the possible devices, elements supporting non-reciprocal transmission are of great interest for applications where signal routing and isolation is required. In this respect, breaking reciprocity is typically accomplished via Faraday rotation through appropriate magneto-optical arrangements. Unfortunately, standard light emitting optoelectronic materials like for example III-V semiconductors, lack magneto-optical properties and hence cannot be directly used in this capacity. To address these issues, a number of different tactics have been attempted in the last few years. These …

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Internal Degrees Of Freedom And Spin Transitions In Single Molecule Magnets, James Atkinson Jan 2016

Internal Degrees Of Freedom And Spin Transitions In Single Molecule Magnets, James Atkinson

Electronic Theses and Dissertations

This thesis covers a range of work detailing the transitions between spin eigenstates in molecular magnet systems. Broadly speaking, these transitions can be divided into two kinds: Those that involve a the tunneling of spin through a potential barrier to a resonant state on the other side, a phenomenon known as quantum tunneling of magnetization, and those that occur through the absorption or emission of a photon. In this latter case, the energy of the photon must match the difference between two eigenstates with a difference in angular momentum of ?. We will detail research performed on single molecule magnets, …

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Optical Parity Time Metasurface Structures, Ahmed El Halawany Jan 2016

Optical Parity Time Metasurface Structures, Ahmed El Halawany

Electronic Theses and Dissertations

In the last few years, optics has witnessed the emergence of two fields namely metasurfaces and parity-time (PT) symmetry. Optical metasurfaces are engineered structures that provide unique responses to electromagnetic waves, absent in natural materials. Optical metasurfaces are known for their reduced dimensionality i.e. subwavelength and consequently lower losses are anticipated. The other paradigm is the PT symmetric materials, also known as photonic synthetic matter. PT symmetry has emerged from quantum mechanics when a new class of non-Hermitian Hamiltonian quantum systems was highlighted to have real eigenvalues, hence eradicating Hermiticity of the Hamiltonian as an essential condition to the existence …

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Coupling Of Laser Beams For Filament Propagation, Daniel Kepler Jan 2016

Coupling Of Laser Beams For Filament Propagation, Daniel Kepler

Electronic Theses and Dissertations

Laser filamentation is a nonlinear process involving high-energy, ultrashort pulses that create narrow, non-diffracting structures over many times the Raleigh length. While many of the characteristics of filaments can vary greatly depending on the physical parameters used to create them, they share several defining features: a high intensity core, a lower intensity cladding of photons that serves as an energy reservoir to the core, and spectral broadening into a supercontinuum. While there have been many studies on the creation and control of multiple filaments from one laser pulse and a few studies on the interaction of two single filaments, many …

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Theoretical-Experimental Study Of The Two-Photon Circular Dichroism Of Helicenes And Aromatic Amino Acids In The Uv Region: From The Structure-Property Relationship To The Final Implementation, Yuly Katherine Vesga Prada Jan 2016

Theoretical-Experimental Study Of The Two-Photon Circular Dichroism Of Helicenes And Aromatic Amino Acids In The Uv Region: From The Structure-Property Relationship To The Final Implementation, Yuly Katherine Vesga Prada

Electronic Theses and Dissertations

Two-photon circular dichroism (TPCD) has been recognized for its exceptional spectroscopic ability for the structural and conformational analysis of chiral systems due to its high sensitivity to small peptide structural distortions. In 2008, Hernandez and co-workers demonstrated TPCD experimentally by the development of the Double L-scan technique. Since then, we have been working on a systematic theoretical-experimental study of chiral molecules using TPCD. In this dissertation, I present my contribution to the continuation to the study of the structure-property relationship of TPCD in molecules with axial chirality in solution, as well as the implementation of the TPCD measurements in the …

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An Investigation Of The Academic Impact Of The Freshman Transition Course At One Urban Central Florida High School, Timothy Flynn Jan 2016

An Investigation Of The Academic Impact Of The Freshman Transition Course At One Urban Central Florida High School, Timothy Flynn

Electronic Theses and Dissertations

The purpose of this research was to identify the extent to which a high school freshman transition program aligned with research based recommendations and to determine the extent to which the intervention impacted persistence to the tenth grade, on-track-to-graduation status, and academic success. Documents relevant to the program were collected and analyzed for research based themes. Students in the program at the target school were compared to students in a similar high school and a historical cohort of students who attended the target school. The impact of the course was statistically significant for persistence to the tenth grade, on-track to …

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The Efficacy Of An Early Warning System And A Response To Intervention Decision-Making Model For Students Transitioning In Secondary Education, Andrea Walsh Jan 2016

The Efficacy Of An Early Warning System And A Response To Intervention Decision-Making Model For Students Transitioning In Secondary Education, Andrea Walsh

Electronic Theses and Dissertations

The primary goal of this study was to examine the use of an early warning system to aide in recognizing early school disengagement. Additionally, a goal of this study was to examine an intensive response to intervention decision-making process and the difference in student outcomes for those who were selected for the (RtI process. By combining the examination of an early warning system and an RtI decision-making process, this research furthered recommendations for more effective methods of identifying students who are academically disengaged, and gain insight on intervention processes in secondary schools. Therefore the research questions tested the validity of …

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A Model-Based Approach To Mobile Learning And Digital Literacy, Zena Ramsey Jan 2016

A Model-Based Approach To Mobile Learning And Digital Literacy, Zena Ramsey

Electronic Theses and Dissertations

The purpose of this research study was to 1) explore models of technology implementation programs and professional development interventions that promote the successful integration of mobile devices (iPads) in a small elementary school in a large Central Florida school district, and 2) identify the needs of the instructional staff to design a professional development intervention to meet these needs. This school will be referred to as School A. In the U.S., the ownership of mobile devices, such as iPads is on the rise. For example, 88% of American teenagers between ages 13 and 17 have access to a mobile phone, …

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Multidimensional Room-Temperature Fluorescence Microscopy For The Nondestructive Analysis Of Forensic Trace Textile Fibers, Nirvani Mujumdar Jan 2016

Multidimensional Room-Temperature Fluorescence Microscopy For The Nondestructive Analysis Of Forensic Trace Textile Fibers, Nirvani Mujumdar

Electronic Theses and Dissertations

The purpose of this dissertation is to advance nondestructive methodology for forensic fiber examination. Non-destructive techniques that can either discriminate between similar fibers or match a known to a questioned fiber – and still preserve the physical integrity of the fibers for further court examination - are highly valuable in forensic science. A challenging aspect of forensic fiber examinations involves the comparison of fibers colored with visually indistinguishable dyestuffs. This is not an uncommon situation, as there are numerous indistinguishable fibers pre-dyed with commercial dyes of virtually identical colors. Minimal chemical structural variations are actually encouraged by the dye patent …

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Weighted Low-Rank Approximation Of Matrices:Some Analytical And Numerical Aspects, Aritra Dutta Jan 2016

Weighted Low-Rank Approximation Of Matrices:Some Analytical And Numerical Aspects, Aritra Dutta

Electronic Theses and Dissertations

This dissertation addresses some analytical and numerical aspects of a problem of weighted low-rank approximation of matrices. We propose and solve two different versions of weighted low-rank approximation problems. We demonstrate, in addition, how these formulations can be efficiently used to solve some classic problems in computer vision. We also present the superior performance of our algorithms over the existing state-of-the-art unweighted and weighted low-rank approximation algorithms. Classical principal component analysis (PCA) is constrained to have equal weighting on the elements of the matrix, which might lead to a degraded design in some problems. To address this fundamental flaw in …

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Study Of Polychlorinated Biphenyl Dechlorination By Zero Valent Magnesium With And Without Activated Carbon In Acidified Ethanol-Ethyl Lactate System, Fiona Zullo Jan 2016

Study Of Polychlorinated Biphenyl Dechlorination By Zero Valent Magnesium With And Without Activated Carbon In Acidified Ethanol-Ethyl Lactate System, Fiona Zullo

Electronic Theses and Dissertations

Polychlorinated biphenyls (PCBs) are synthetic organic chemicals that ca de detected in the environment worldwide. PCBs were banned in the U.S in 1979 owing to their toxicity and persistence in the environment. Today PCBs are classified as human carcinogens and are among the top ten of the U.S Environmental Protection Agency's (EPA) most toxic chemicals. Many researchers have shown soil to be contaminated with PCBs at concentrations as high as 750 ppm. Given the toxicity of PCBs, there is an urgent need to extract and degrade such chemicals from contaminated soil in a cost effective way. Prior work revealed a …

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The Community College Student's Social Construction Of Global Learning In The Florida College System, Jennifer Robertson Jan 2016

The Community College Student's Social Construction Of Global Learning In The Florida College System, Jennifer Robertson

Electronic Theses and Dissertations

The purpose of this qualitative research study was to examine the Florida community college student's understanding of and engagement in global learning through the lens of constructionist theory. Using a grounded theory methodology, seven students in three Florida community colleges were interviewed to hear in their own words how personal and academic experiences have shaped their interest in other countries, cultures, and current international events. The goal of this study was to explore students' perspectives using the principles of social constructionism and constructivism to create a new model of understanding of global learning. The final results of the study found …

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