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Title: Characterization of Novel Borrelia burgdorferi Transcripts Expressed during Tick and Mammalian Infection.
Creator: Adams, Philip, Jewett, Mollie, Rohde, Kyle, Moore, Sean, Fernandez-Valle, Cristina, University of Central Florida
Abstract / Description: The purpose of this dissertation is to characterize the transcriptome of Borrelia (Borreliella) burgdorferi to discover novel transcripts, important for pathogenesis. As a spirochete and the etiological agent of Lyme disease, the foremost vector-borne bacterial infection in the world, B. burgdorferi fulfills a distinctive niche among bacterial pathogens. Persisting in the disparate environments of a tick vector and mammalian reservoirs, it is absolutely dependent on its hosts for transmission...
Show moreThe purpose of this dissertation is to characterize the transcriptome of Borrelia (Borreliella) burgdorferi to discover novel transcripts, important for pathogenesis. As a spirochete and the etiological agent of Lyme disease, the foremost vector-borne bacterial infection in the world, B. burgdorferi fulfills a distinctive niche among bacterial pathogens. Persisting in the disparate environments of a tick vector and mammalian reservoirs, it is absolutely dependent on its hosts for transmission and nutrient acquisition. B. burgdorferi harbors a complex fragmented genome which is largely linear, unlike that of most prokaryotes, lacks an array of classically described metabolic genes, and contains an unusually large percentage of unique genomic sequences specific to Borrelia (Borreliella) species. To date, few regulatory mechanisms have been identified which contribute to the ability of the spirochete to sense and respond to its environment. Efforts to use global transcript analysis to elucidate the molecular mechanisms of B. burgdorferi host adaptation have proven challenging due to the low numbers of the pathogen present during infection. Previously, our laboratory successfully developed an in vivo expression technology based approach for B. burgdorferi (BbIVET) to identify spirochete promoter sequences that are active during a murine infection. This screen identified 233 unique putative promoters which mapped to locations across the entire genome. These putative infection-active B. burgdorferi promoters were not only located at the 5' end of annotated open reading frames (ORFs), but also mapped to unannotated locations antisense, intergenic, and intragenic to ORFs. Given the limited characterization of the B. burgdorferi transcriptome, this dissertation applies an RNA sequencing approach (5'RNA-seq) to globally annotate the transcriptional start sites (TSSs) and 5' processed ends of the spirochete's RNA during in vitro cultivation. This resulted in the discovery of numerous novel internal, intergenic, and antisense transcripts. Synergistic analysis combining Northern blotting techniques, alignments of these transcripts to BbIVET proposed promoters, and interrogation of promoter activity via in vivo live imaging of mice, confirmed the expression of a variety of RNAs during laboratory culture and mammalian infection. Further, as a means to improve quantitation of the expression of these transcripts, a new methodology was developed and applied to measure B. burgdorferi promoter activity during tick-pathogen interactions, in a strand specific manner. Finally, because the Lyme disease spirochete harbors many unclassified and unique genomic sequences, the mammalian infection-expressed gene bb0562, identified through BbIVET and 5'RNA-seq, was selected for targeted deletion and evaluation throughout B. burgdorferi's infectious cycle. This demonstrated that gene bb0562 encodes a membrane associated protein, whose presence is critical for establishing murine infection through the bite of an infected tick. In sum, this work contributes significant insight into the transcriptome of B. burgdorferi, provides an innovative approach for the analysis of RNA transcripts at the tick-pathogen interface, and identifies a novel gene critical for Lyme disease pathogenesis.
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Date Issued: 2017
Identifier: CFE0006707, ucf:51915
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006707

Title: Heterogeneous Reconfigurable Fabrics for In-circuit Training and Evaluation of Neuromorphic Architectures.
Creator: Mohammadizand, Ramtin, DeMara, Ronald, Lin, Mingjie, Sundaram, Kalpathy, Fan, Deliang, Wu, Annie, University of Central Florida
Abstract / Description: A heterogeneous device technology reconfigurable logic fabric is proposed which leverages the cooperating advantages of distinct magnetic random access memory (MRAM)-based look-up tables (LUTs) to realize sequential logic circuits, along with conventional SRAM-based LUTs to realize combinational logic paths. The resulting Hybrid Spin/Charge FPGA (HSC-FPGA) using magnetic tunnel junction (MTJ) devices within this topology demonstrates commensurate reductions in area and power consumption over...
Show moreA heterogeneous device technology reconfigurable logic fabric is proposed which leverages the cooperating advantages of distinct magnetic random access memory (MRAM)-based look-up tables (LUTs) to realize sequential logic circuits, along with conventional SRAM-based LUTs to realize combinational logic paths. The resulting Hybrid Spin/Charge FPGA (HSC-FPGA) using magnetic tunnel junction (MTJ) devices within this topology demonstrates commensurate reductions in area and power consumption over fabrics having LUTs constructed with either individual technology alone. Herein, a hierarchical top-down design approach is used to develop the HSC(&)#173; FPGA starting from the configurable logic block (CLB) and slice structures down to LUT circuits and the corresponding device fabrication paradigms. This facilitates a novel architectural approach to reduce leakage energy, minimize communication occurrence and energy cost by eliminating unnecessary data transfer, and support auto-tuning for resilience. Furthermore, HSC-FPGA enables new advantages of technology co-design which trades off alternative mappings between emerging devices and transistors at runtime by allowing dynamic remapping to adaptively leverage the intrinsic computing features of each device technology. HSC-FPGA offers a platform for fine-grained Logic-In-Memory architectures and runtime adaptive hardware.An orthogonal dimension of fabric heterogeneity is also non-determinism enabled by either low(&)#173; voltage CMOS or probabilistic emerging devices. It can be realized using probabilistic devices within a reconfigurable network to blend deterministic and probabilistic computational models. Herein, consider the probabilistic spin logic p-bit device as a fabric element comprising a crossbar(&)#173; structured weighted array. The programmability of the resistive network interconnecting p-bit devices can be achieved by modifying the resistive states of the array's weighted connections. Thus, the programmable weighted array forms a CLB-scale macro co-processing element with bitstream programmability. This allows field programmability for a wide range of classification problems and recognition tasks to allow fluid mappings of probabilistic and deterministic computing approaches. In particular, a Deep Belief Network (DBN) is implemented in the field using recurrent layers of co-processing elements to form an n(&)#215; m1(&)#215;m2(&)#215;...(&)#215;mi weighted array as a configurable hardware circuit with an n-input layer followed by i?1 hidden layers. As neuromorphic architectures using post-CMOS devices increase in capability and network size, the utility and benefits of reconfigurable fabrics of neuromorphic modules can be anticipated to continue to accelerate.
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Date Issued: 2019
Identifier: CFE0007502, ucf:52643
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0007502

Title: Curating culture through social media in the 21st century: Orlando as a case study for arts participation and engagement among millennials.
Creator: Givoglu, Wendy, Applen, JD, McDaniel, Rudy, Vie, Stephanie, Krick, Stephanie, University of Central Florida
Abstract / Description: The American non-profit arts sector is faced with challenges including shifting audience demographics, competition for patrons due to evolving new media and entertainment technologies, changes in donors, and the discontinuation of federal and state funding sources. Savvy arts organizations are rebooting for long-term sustainability and relevancy to their communities, while some organizations adhere to unchanged practices and modes of operation. Amidst the 21st century digital landscape, arts...
Show moreThe American non-profit arts sector is faced with challenges including shifting audience demographics, competition for patrons due to evolving new media and entertainment technologies, changes in donors, and the discontinuation of federal and state funding sources. Savvy arts organizations are rebooting for long-term sustainability and relevancy to their communities, while some organizations adhere to unchanged practices and modes of operation. Amidst the 21st century digital landscape, arts engagement that yields personal and community impact and sustainability for the future is indeed attainable. Characteristics of participatory culture and democratization rooted in emerging digital entertainment and social media communications technology, coupled with the power of the millennial generation, the first generation with access to digital technologies since birth, are two forces that can be non-profit arts organizations' biggest resources and are inherently a part of the arts. Using a mixed method approach, this project examines discourse surrounding arts engagement, focusing on the millennial generation, social media as a catalyst for potent arts participation, and Central Florida as a region demonstrating significant innovations and opportunities for growth in the arts. A survey was completed by Central Florida millennials, and with permission from Americans for the Arts, select questions replicated their 2016 National Arts Engagement survey, situating Central Florida alongside National data. Qualitatively, interviews were conducted with six executive directors of Central Florida non-profit arts organizations. Grounded theory practices yielded a synthesis of perspectives and strategic action plan for arts organizations to consider. Resulting recommendations for organizations seeking to further arts engagement with millennials via social media include: incorporating transmedia storytelling elements, considering how the arts convene and create around causes, programming with consideration of the life cycles and interests of millennials, considering diversity and cultural equity in the arts, and creating experiences that define engagement in the digital and physical worlds.
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Date Issued: 2019
Identifier: CFE0007460, ucf:52675
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0007460

Title: The Comradeship of the Open Road: The Identity and Influence of the Tin Can Tourists of the World on Automobility, Florida, and National Tourism.
Creator: Burel, David, Foster, Amy, Walker, Ezekiel, Lester, Connie, University of Central Florida
Abstract / Description: The identity of the Tin Can Tourists of the World, the first recreation automobile organization, has been poorly defined in the historical discourse, the factors contributing to the 1919 formation of the organization in Tampa, Florida represents a landmark shift in tourism in America towards the automobile.The group's subsequent solidification of a distinct identity gives insight beyond their organization. The thesis defines their identity as well as looks at their impact on American...
Show moreThe identity of the Tin Can Tourists of the World, the first recreation automobile organization, has been poorly defined in the historical discourse, the factors contributing to the 1919 formation of the organization in Tampa, Florida represents a landmark shift in tourism in America towards the automobile.The group's subsequent solidification of a distinct identity gives insight beyond their organization. The thesis defines their identity as well as looks at their impact on American automobility and tourism. The thesis therefore focuses on the previously undefined concept of recreational automobility giving it definition and showing how the group helped to define it.The group's early role in mass use and adaptation of the automobile for recreation represents the first steps in creating a market for recreational vehicles. The imposition of organization on the camping experience by the Tin Can Tourists and their influence on creating special places for the practice of their activities helped define recreational automobility.The footprint left by the Tin Can Tourists helped shape part of America's modern tourist industry. The legacy of their ideas about recreational automobility also suggests influence they had on later groups using recreational vehicles. This thesis examines and clarifies the identity and influence of the Tin Can Tourists of the World as a window on important trends in automobility and tourism.
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Date Issued: 2012
Identifier: CFE0004306, ucf:49472
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0004306

Title: ANALYSIS OF THE RELATIONSHIP BETWEEN THE LEVEL OF EDUCATIONAL COMPUTER GAME USE AND MILKEN EXEMPLAR TEACHER INSTRUCTIONAL STRATEGIES.
Creator: Dahan Marks, Yaela, Proctor, Michael, University of Central Florida
Abstract / Description: This research examines the nature and level of educational computer-based game techniques adoption by Milken Educator Award winning teachers in achieving success in their classrooms. The focus of the research is on their level of acceptance of educational computer-based games and the nature of game usage to increase student performance in the classroom. With Davis' (1985) Technology Acceptance Model (Davis, 1985) as the conceptual framework, the research also examines how teachers'...
Show moreThis research examines the nature and level of educational computer-based game techniques adoption by Milken Educator Award winning teachers in achieving success in their classrooms. The focus of the research is on their level of acceptance of educational computer-based games and the nature of game usage to increase student performance in the classroom. With Davis' (1985) Technology Acceptance Model (Davis, 1985) as the conceptual framework, the research also examines how teachers' perceptions of educational computer-based games influence their willingness to incorporate these teaching methods in their classroom. The approach utilizes a descriptive survey to develop and evaluate responses from exemplar teachers about the level and nature of their use (or lack thereof) of educational computer-based games and implementation in the classroom. Further, this research seeks to identify successful and unsuccessful techniques in the use of educational computer-based games in the classroom. In addition, data collection and analysis will seek to identify the strength of relationships between content-specific educational computer-based games and subject; educational computer-based games and gender; educational computer-based games and age; etc. A teacher who is exemplary as defined by Milken Educator Awards possesses, "exceptional educational talent as evidenced by effective instructional practices and student learning results in the classroom and school". Survey findings are placed within the Technology Acceptance Model framework developed by Davis.
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Date Issued: 2011
Identifier: CFE0003682, ucf:48811
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0003682

Title: Making Waves, Mixing Colors, and Using Mirrors: The Self-Regulated Learning Support Features and Procedural Rhetoric of Three Whole-Body Educational Games.
Creator: Johnson, Emily, McDaniel, Rudy, Vie, Stephanie, Applen, John, Pigg, Stacey, Lindgren, Robb, University of Central Florida
Abstract / Description: This dissertation investigates the question, (")How can the procedural rhetoric of three whole-body educational games improve the understanding of self-regulated learning with digital technology?(") It explores three whole-body educational games (WBEGs) using a quantitative study, a case study, and analyses of their procedural rhetoric to better understand the roles these types of games can have in teaching digital literacy and self-regulated learning (SRL) skills. The three WBEGs, Waves,...
Show moreThis dissertation investigates the question, (")How can the procedural rhetoric of three whole-body educational games improve the understanding of self-regulated learning with digital technology?(") It explores three whole-body educational games (WBEGs) using a quantitative study, a case study, and analyses of their procedural rhetoric to better understand the roles these types of games can have in teaching digital literacy and self-regulated learning (SRL) skills. The three WBEGs, Waves, Color Mixer, and Light and Mirrors, are each intended to teach science concepts to players. These games are similarly structured in that they all invite players to immerse themselves in the game by standing on the (")screen(") (the games project images on the floor). The WBEGs differ from traditional console video games because they receive input from players via motion-sensing technology, requiring players to make large movements with their bodies to influence elements within the game. This study explains SRL as a complex combination of internal (mental) behavior, external (observable) behavior, and interpersonal (social) behavior, identifying within three WBEGs the presence of elements supporting the SRL behaviors of goal setting, strategy planning, collaboration, progress monitoring, feedback, and reflection. These findings inform the understanding of SRL by revealing that each game includes a different combination of SRL-supporting elements that encourage the use of SRL skills in different ways. SRL scaffolding features are those elements within a WBEG that guide players to use certain SRL strategies, helping and supporting their efforts much like construction scaffolding supports a building as it is being erected. This dissertation also utilizes analyses of procedural rhetoric to investigate the techniques reinforced by the underlying structure of these three WBEGs in an effort to further the understanding of digital literacy in education and sociocultural contexts. All three WBEGs appear to emphasize player agency and collaboration. Waves and Light and Mirrors encourage player strategy, while Color Mixer rewards speed and rote knowledge. These reinforced techniques perpetuate the underlying cultural values of accuracy, collaboration, problem-solving, autonomy, and scaffolding. This study discusses these values in the contexts of education and society.
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Date Issued: 2015
Identifier: CFE0005959, ucf:50799
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0005959

Title: Exploring Interactions between Adult English Learners and Their TeachLivE Digital Character Peers.
Creator: Yan, Ting, Nutta, Joyce, Zygouris-Coe, Vassiliki, Bai, Haiyan, Mihai, Florin, University of Central Florida
Abstract / Description: Peer interaction is an important part of language learning. The results of previous studies showed advantages and disadvantages of peer interaction between native speakers and English learners. Using the educational simulation platform TeachLivE as the interaction platform, this qualitative descriptive case study explored the possibilities of bridging the gap between classroom language practice and real-life second language communication. The study recruited eight participants for a task...
Show morePeer interaction is an important part of language learning. The results of previous studies showed advantages and disadvantages of peer interaction between native speakers and English learners. Using the educational simulation platform TeachLivE as the interaction platform, this qualitative descriptive case study explored the possibilities of bridging the gap between classroom language practice and real-life second language communication. The study recruited eight participants for a task-based interaction project. Using conversation analysis, the study revealed details in communication between adult English learners and their digital character peers. During the interactions, the participants were actively involved and the most frequent communication patterns were collaborative and cooperative. The analysis of interviews of participants and the interactor explored the factors that influenced the communication patterns between the young adult English learners and their digital peers. The results showed that the communication experience with digital characters was authentic and the virtual platform was critical to build the confidence of English learners' language use. Moreover, the multiple digital characters manipulated by interaction protocols were also helpful to create a scaffolding effect for practicing oral communication for the English learners.
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Date Issued: 2017
Identifier: CFE0006823, ucf:51761
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006823

Title: A Formative Process Evaluation Study of Teacher Usage of a Learning Management System in a K-12 Public School.
Creator: Franzese, Victoria, Gunter, Glenda, Swan, Bonnie, Hartshorne, Richard, Vitale, Thomas, Rath, Victoria, University of Central Florida
Abstract / Description: The purpose of this study is to explore teacher perceptions, concerns, and integration of a Learning Management System (LMS) in a K-12 public school. With more educational institutions adopting LMSs, it is imperative to examine teachers' concerns regarding the tool as teachers have an important role in how effectively an innovation(-)such as an LMS(-)is implemented (Lochner, Conrad, (&) Graham, 2015). Ultimately, adoption of an innovation can be successful if teachers have an understanding of...
Show moreThe purpose of this study is to explore teacher perceptions, concerns, and integration of a Learning Management System (LMS) in a K-12 public school. With more educational institutions adopting LMSs, it is imperative to examine teachers' concerns regarding the tool as teachers have an important role in how effectively an innovation(-)such as an LMS(-)is implemented (Lochner, Conrad, (&) Graham, 2015). Ultimately, adoption of an innovation can be successful if teachers have an understanding of the components leading to the innovation's success, such as the innovation's value in enhancing both the curriculum and the students' learning experiences (Lochner et al., 2015). This study used the Concerns-Based Adoption Model (CBAM) as a main framework to not only measure implementation of the LMS, but to also increase the likelihood of the LMS effecting positive change in schools (George, Hall, (&) Stiegelbauer, 2006). The framework's Stages of Concern Questionnaire (SoCQ) was used with participants to determine teachers' concerns. The sample population for this study consisted of secondary teachers at a public high school in central Florida in 2017. Out of the 125 teachers employed at the school, a total of 36 (n = 36) participated in the online survey. Three of the teachers surveyed then participated in interviews to provide additional insight.Data was analyzed and organized into five main topics: (a) Stages of Concern Profile; (b) teacher concerns; (c) benefits of the LMS; (d) barriers to the LMS; and (e) teacher needs. An analysis of the survey data revealed that the study's survey participants, on average, had the highest concerns at Stage 0 (Unconcerned), Stage 1 (Informational) and Stage 2 (Personal), thus indicating the group conformed to a non-user profile when it comes to LMS use. An analysis of the interview data revealed an overall positive disposition toward the LMS with the self-awareness that participants have more to learn about its capabilities. Results suggested that LMS implementation should be refined in order to allow participants to advance to higher stages of concern (George et al., 2006). Further research should be conducted on other areas of LMS implementation, including the students' perceptions and concerns when it comes to using the LMS.
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Date Issued: 2017
Identifier: CFE0006739, ucf:51834
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006739

Title: Digital Dissonance: Horror Cultures in the Age of Convergent Technologies.
Creator: Powell, Daniel, McDaniel, Rudy, Campbell, James, Brenckle, Martha, Arnzen, Michael, University of Central Florida
Abstract / Description: The first two decades of the new millennium have witnessed an abundance of change in the areas of textual production, digital communication, and our collective engagement with the Internet. This study explores these changes, which have yielded both positive and negative cultural and developmental outcomes, as products of digital dissonance. Dissonance is characterized by the disruptive consequences inherent in technology's incursion into the print publication cultures of the twentieth century...
Show moreThe first two decades of the new millennium have witnessed an abundance of change in the areas of textual production, digital communication, and our collective engagement with the Internet. This study explores these changes, which have yielded both positive and negative cultural and developmental outcomes, as products of digital dissonance. Dissonance is characterized by the disruptive consequences inherent in technology's incursion into the print publication cultures of the twentieth century, the explosion in social-media interaction that is changing the complexion of human contact, and our expanding reliance on the World Wide Web for negotiating commerce, culture, and communication.This study explores digital dissonance through the prism of an emerging literary subgenre called technohorror. Artists working in the area of technohorror are creating works that leverage the qualities of plausibility, mundanity, and surprise to tell important stories about how technology is altering the human experience in the twenty-first century. This study explores such subjects as paradigmatic changes in textual production methods, dynamic authorial hybridity, digital materiality in folklore studies, posthumanism, transhumanism, cognitive diminution, and physical degeneration as explored in works of technohorror.The work's rhetorical architecture includes elements of both theoretical and qualitative research. This project expands on City University of New York philosophy professor No(&)#235;l Carroll's definition of art-horror in developing a formal explanation of technohorror and then exploring that literary subgenre through the analysis of a series of contemporary texts and industry-related trends. The study also contains original interviews with active scholars, artists, editors, and librarians in the horror field to gain a variety of perspectives on these complicated subjects.
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Date Issued: 2017
Identifier: CFE0006642, ucf:51231
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006642

Title: A formative evaluation of a technology-mediated alternative to traditional study abroad.
Creator: Howard, Wendy, Gunter, Glenda, Ramirez, Bernardo, Vitale, Thomas, Moskal, Patsy, University of Central Florida
Abstract / Description: Purpose: The purpose of this study was to determine if a proposed technology-mediated intervention is a viable alternative to traditional study abroad for those who are unable to travel. While technology cannot reproduce the same experience of traveling abroad, the primary objective of this study was to determine if there is value in using Web conferencing technology to provide students with access to the same opportunity to interact with international experts in the field as their...
Show morePurpose: The purpose of this study was to determine if a proposed technology-mediated intervention is a viable alternative to traditional study abroad for those who are unable to travel. While technology cannot reproduce the same experience of traveling abroad, the primary objective of this study was to determine if there is value in using Web conferencing technology to provide students with access to the same opportunity to interact with international experts in the field as their counterparts who were able to travel. This formative evaluation is the first in a series of iterative studies aimed at developing a viable, sustainable, technology-based solution through design-based research (Reeves, 2006).Methodology/Design: Two guiding questions drove the focus of this formative evaluation: Did the program accomplish what was intended and was it implemented effectively? These generated a set of evaluation questions using the Online Learning Consortium (OLC) Quality Framework, which were used to evaluate the quality of a joint study abroad program in Brazil with students and instructors from the University of Central Florida and the University of Scranton. While studying global health management in Brazil, the group in the field broadcasted their site visits live to online participants back in the United States. Web conferencing tools allowed the online attendees to see and hear the group in Brazil and interact in real time through the audio or text chat. Evaluation data was compiled from multiple sources including an anonymous student survey, instructor interviews, session recordings, financial budgets, and online facilitator observations in order to triangulate and evaluate the effectiveness of this Web-based intervention.Findings: Web conferencing technology appears to be a viable alternative that is not necessarily as immersive as traveling abroad, but it does provide its own set of benefits to higher education students. This formative evaluation revealed clear areas for improvement, including technical and procedural elements, but instructors and online participants did find value in the experience. Was it perfect? No. Was it successful? Yes. Was it encouraging? Definitely. Exploration of the evaluation questions under each of the five pillars of the OLC Quality Framework revealed both success factors and areas for improvement in each of the following categories: learning effectiveness, scale (commitment (&) cost), access, faculty satisfaction, and student satisfaction.Implications: Overall, this was a successful proof of concept that justifies future improvements and subsequent further evaluation in an iterative design-based research program. In addition to repeating this study with the joint global health management course in Brazil, this intervention could also be implemented and evaluated in other contexts, disciplines, and countries around the world. This formative evaluation produced a set of recommendations for the next study based on the success factors as well as the areas for improvement identified in this initial implementation in addition to a list of suggestions for future research.
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Date Issued: 2015
Identifier: CFE0005808, ucf:50041
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0005808

Title: A Psychophysical Approach to Standardizing Texture Compression for Virtual Environments.
Creator: Flynn, Jeremy, Szalma, James, Fidopiastis, Cali, Jentsch, Florian, Shah, Mubarak, University of Central Florida
Abstract / Description: Image compression is a technique to reduce overall data size, but its effects on human perception have not been clearly established. The purpose of this effort was to determine the most effective psychophysical method for subjective image quality assessment, and to apply those findings to an objective algorithm. This algorithm was used to identify the minimum level of texture compression noticeable to the human, in order to determine whether compression-induced texture distortion impacted...
Show moreImage compression is a technique to reduce overall data size, but its effects on human perception have not been clearly established. The purpose of this effort was to determine the most effective psychophysical method for subjective image quality assessment, and to apply those findings to an objective algorithm. This algorithm was used to identify the minimum level of texture compression noticeable to the human, in order to determine whether compression-induced texture distortion impacted game-play outcomes. Four experiments tested several hypotheses. The first hypothesis evaluated which of three magnitude estimation (ME) methods (absolute ME, absolute ME plus, or ME with a standard) for image quality assessment was the most reliable. The just noticeable difference (JND) point for textures compression against the Feature Similarity Index for color was determined The second hypothesis tested whether human participants perceived the same amount of distortion differently when textures were presented in three ways: when textures were displayed as flat images; when textures were wrapped around a model; and when textures were wrapped around models and in a virtual environment. The last set of hypotheses examined whether compression affected both subjective (immersion, technology acceptance, usability) and objective (performance) gameplay outcomes. The results were: the absolute magnitude estimation method was the most reliable; no difference was observed in the JND threshold between flat textures and textures placed on models, but textured embedded within the virtual environment were more noticeable than in the other two presentation formats. There were no differences in subjective gameplay outcomes when textures were compressed to below the JND thresholds; and those who played a game with uncompressed textures performed better on in-game tasks than those with the textures compressed, but only on the first in-game day. Practitioners and researchers can use these findings to guide their approaches to texture compression and experimental design.
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Date Issued: 2018
Identifier: CFE0007178, ucf:52250
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0007178

Title: CMOS RF CITUITS VARIABILITY AND RELIABILITY RESILIENT DESIGN, MODELING, AND SIMULATION.
Creator: Liu, Yidong, Yuan, Jiann-Shiun, University of Central Florida
Abstract / Description: The work presents a novel voltage biasing design that helps the CMOS RF circuits resilient to variability and reliability. The biasing scheme provides resilience through the threshold voltage (VT) adjustment, and at the mean time it does not degrade the PA performance. Analytical equations are established for sensitivity of the resilient biasing under various scenarios. Power Amplifier (PA) and Low Noise Amplifier (LNA) are investigated case by case through modeling and experiment. PTM 65nm...
Show moreThe work presents a novel voltage biasing design that helps the CMOS RF circuits resilient to variability and reliability. The biasing scheme provides resilience through the threshold voltage (VT) adjustment, and at the mean time it does not degrade the PA performance. Analytical equations are established for sensitivity of the resilient biasing under various scenarios. Power Amplifier (PA) and Low Noise Amplifier (LNA) are investigated case by case through modeling and experiment. PTM 65nm technology is adopted in modeling the transistors within these RF blocks. A traditional class-AB PA with resilient design is compared the same PA without such design in PTM 65nm technology. Analytical equations are established for sensitivity of the resilient biasing under various scenarios. A traditional class-AB PA with resilient design is compared the same PA without such design in PTM 65nm technology. The results show that the biasing design helps improve the robustness of the PA in terms of linear gain, P1dB, Psat, and power added efficiency (PAE). Except for post-fabrication calibration capability, the design reduces the majority performance sensitivity of PA by 50% when subjected to threshold voltage (VT) shift and 25% to electron mobility (¼n) degradation. The impact of degradation mismatches is also investigated. It is observed that the accelerated aging of MOS transistor in the biasing circuit will further reduce the sensitivity of PA. In the study of LNA, a 24 GHz narrow band cascade LNA with adaptive biasing scheme under various aging rate is compared to LNA without such biasing scheme. The modeling and simulation results show that the adaptive substrate biasing reduces the sensitivity of noise figure and minimum noise figure subject to process variation and device aging such as threshold voltage shift and electron mobility degradation. Simulation of different aging rate also shows that the sensitivity of LNA is further reduced with the accelerated aging of the biasing circuit. Thus, for majority RF transceiver circuits, the adaptive body biasing scheme provides overall performance resilience to the device reliability induced degradation. Also the tuning ability designed in RF PA and LNA provides the circuit post-process calibration capability.
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Date Issued: 2011
Identifier: CFE0003595, ucf:48861
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0003595

Title: The Impact of using a Computer Algebra System in High School Calculus on High Performing Students' Conceptual and Procedural Understanding.
Creator: Bawatneh, Zyad, Haciomeroglu, Erhan, Dixon, Juli, Ortiz, Enrique, Saleh, Suha, University of Central Florida
Abstract / Description: Recently, there has been an increasing interest in high school mathematics education, especially in the teaching and learning of calculus. For example, studies conducted by Bressoud (2010); Judson and Nishimori (2005); Koh and Divaharan (2011); and St. Jarre (2008) all looked at how to improve the understanding of calculus students and what roles the educator must take to ensure that their students are successful. The purpose of this study was to determine if there was a significant...
Show moreRecently, there has been an increasing interest in high school mathematics education, especially in the teaching and learning of calculus. For example, studies conducted by Bressoud (2010); Judson and Nishimori (2005); Koh and Divaharan (2011); and St. Jarre (2008) all looked at how to improve the understanding of calculus students and what roles the educator must take to ensure that their students are successful. The purpose of this study was to determine if there was a significant difference between instruction using computer algebra system (CAS) compared to instruction using the graphing calculator in high school calculus on students' conceptual and procedural understanding. This study explored and compared two different types of instruction based on the use of two different types of technology, CAS and graphing calculator. The total population for this study consisted of 333 students. There were 187 students classified as using the graphing calculator and 146 students classified as using CAS. The data for this study were collected from four Advanced Placement (AP) calculus AB courses from high schools in Florida. The study used observations and two sets of calculus tasks in order to gather data. The research questions for this study looked at comparing the grades of students categorized based on the type of instruction received during the learning of calculus. The statistical procedure that was used was a simple one-way analysis of variance (ANOVA). The results indicated that there was no significant difference between the two types of instruction on the students' procedural knowledge, however, there was statistical significance on the students' conceptual understanding in favor of the CAS students. The study introduces a framework on how to obtain information about the effects of different types of instruction on students' understanding of calculus. The results of this study contribute in assisting teachers and future researchers on how to analyze student work in order to obtain information about the students' conceptual and procedural understanding of first semester calculus.
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Date Issued: 2012
Identifier: CFE0004514, ucf:49278
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0004514

Title: INTERACTIVE TEXT-IMAGE CONCEPTUAL MODELS FOR LITERARY INTERPRETATION AND COMPOSITION IN THE DIGITAL AGE.
Creator: Weaver, Elizabeth, Saper, Craig, University of Central Florida
Abstract / Description: This dissertation focuses on text-image conceptual models for literary interpretation and composition in the digital age. The models investigate an interactive blend of textually-based linear-sequential approaches and visually-based spatial-simultaneous approaches. The models employ Gestalt-inspired figure-ground segregation models, along with other theoretical models, that demonstrate the dynamic capabilities of images as conceptual tools as well as alternate forms of text. The models...
Show moreThis dissertation focuses on text-image conceptual models for literary interpretation and composition in the digital age. The models investigate an interactive blend of textually-based linear-sequential approaches and visually-based spatial-simultaneous approaches. The models employ Gestalt-inspired figure-ground segregation models, along with other theoretical models, that demonstrate the dynamic capabilities of images as conceptual tools as well as alternate forms of text. The models encourage an interpretative style with active participants in open-ended, multi-sensory meaning-making processes. The models use the flexible tools of modern technology as approaches to meaning-making with art strategies used for research strategies as well as a means to appreciate reading and writing in the context of an increasingly visual environment.
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Date Issued: 2010
Identifier: CFE0003008, ucf:48335
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0003008

Title: THE DESIGN AND DEVELOPMENT OF AN ADDITIVE FABRICATION PROCESS AND MATERIAL SELECTION TOOL.
Creator: Palmer, Andrew, Elshennawy, Ahmad, University of Central Florida
Abstract / Description: In the Manufacturing Industry there is a subset of technologies referred to as Rapid Technologies which are those technologies that create the ability to compress the time to market for new products under development . Of this subset, Additive Fabrication (AF), or more commonly known as Rapid Prototyping (RP), acquires much attention due to its unique and futuristic approach to the production of physical parts directly from 3D CAD data, CT or MRI scans, or data from laser scanning systems by...
Show moreIn the Manufacturing Industry there is a subset of technologies referred to as Rapid Technologies which are those technologies that create the ability to compress the time to market for new products under development . Of this subset, Additive Fabrication (AF), or more commonly known as Rapid Prototyping (RP), acquires much attention due to its unique and futuristic approach to the production of physical parts directly from 3D CAD data, CT or MRI scans, or data from laser scanning systems by utilizing various techniques to consecutively generate cross-sectional layers of a given thickness upon the previous layer to form 3D objects. While Rapid Prototyping is the most common name for the production technology it is also referred to as Additive Manufacturing, Layer Based Manufacturing, Direct Digital Manufacturing, Free-Form Fabrication, and 3-Dimensional Printing. With over 35 manufacturers of Additive Fabrication equipment in 2006 , the selection of an AF process and material for a specific application can become a significant task, especially for those with little or no technical experience with the technology and to add to this challenge, many of the various processes have multiple material options to select from . This research was carried out in order to design and construct a system that would allow a person, regardless of their level of technical knowledge, to quickly and easily filter through the large number of Additive Fabrication processes and their associated materials in order to find the most appropriate processes and material options to create physical reproductions of any part. The selection methodology used in this paper is a collection of assumptions and rules taken from the author's viewpoint of how, in real world terms, the selection process generally takes place between a consumer and a service provider. The methodology uses those assumptions in conjunction with a set of expert based rules to direct the user to a best set of qualifying processes and materials suited for their application based on as many or as few input fields the user may be able to complete.
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Date Issued: 2009
Identifier: CFE0002625, ucf:48241
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0002625

Title: ENTERPRISE BUSINESS ALIGNMENT USING QUALITY FUNCTION DEPLOYMENT, MULTIVARIATE DATA ANALYSIS AND BUSINESS MODELING TOOLS.
Creator: GAMMOH, DIALA, Elshennawy, Ahmad, University of Central Florida
Abstract / Description: This dissertation proposes two novel ideas to enhance the business strategy alignment to customer needs. The proposed business alignment clock is a new illustration to the relationships between customer requirements, business strategies, capabilities and processes. To line up the clock and reach the needed alignment for the enterprise, a proposed clock mechanism is introduced. The mechanism integrates the Enterprise Business Architecture (EBA) with the House of Quality (HoQ). The relationship...
Show moreThis dissertation proposes two novel ideas to enhance the business strategy alignment to customer needs. The proposed business alignment clock is a new illustration to the relationships between customer requirements, business strategies, capabilities and processes. To line up the clock and reach the needed alignment for the enterprise, a proposed clock mechanism is introduced. The mechanism integrates the Enterprise Business Architecture (EBA) with the House of Quality (HoQ). The relationship matrix inside the body of the house is defined using multivariate data analysis techniques to accurately measure the strength of the relationships rather than defining them subjectively. A statistical tool, multivariate data analysis, can be used to overcome the ambiguity in quantifying the relationships in the house of quality matrix. The framework is proposed in the basic conceptual model context of the EBA showing different levels of the enterprise architecture; the goals, the capabilities and the value stream architecture components. In the proposed framework, the goals and the capabilities are inputs to two houses of quality, in which the alignment between customer needs and business goals, and the alignment between business goals and capabilities are checked in the first house and the second house, respectively. The alignment between the business capabilities and the architecture components (workflows, events and environment) is checked in a third HoQ using the performance indicators of the value stream architecture components, which may result in infrastructure expansion, software development or process improvement to reach the needed alignment by the enterprise. The value of the model was demonstrated using the Accreditation Board of Engineering and Technology (ABET) process at the Industrial Engineering and Management Systems department at the University of Central Florida. The assessment of ABET criteria involves an evaluation of the extent to which the program outcomes are being achieved and results in decisions and actions to improve the Industrial Engineering program at the University of Central Florida. The proposed framework increases the accuracy of measuring the extent to which the program learning outcomes have been achieved at the department. The process of continuous alignment between the educational objectives and customer needs becomes more vital by the rapid change of customer requirements that are obtained from both internal and external constituents (students, faculty, alumni, and employers in the first place).
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Date Issued: 2010
Identifier: CFE0003298, ucf:48506
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0003298

Title: Virtual Coaching of Novice Science Educators to Support Students with Emotional and Behavioral Disorders.
Creator: Garland, Dennis, Dieker, Lisa, Vasquez, Eleazar, Hines, Rebecca, Rosenberg, Michael, University of Central Florida
Abstract / Description: Due to a multitude of convergent circumstances, students labeled in the disability category of emotional and behavioral disorders (EBD) experience high rates of academic and behavioral failure. Such failure frequently leads to the students' dropping out of school, involvement in the judicial system, or a combination of those outcomes. Science is an academic content area that has the potential to enhance behavioral and academic success of students with EBD. Researchers, nonprofits, and...
Show moreDue to a multitude of convergent circumstances, students labeled in the disability category of emotional and behavioral disorders (EBD) experience high rates of academic and behavioral failure. Such failure frequently leads to the students' dropping out of school, involvement in the judicial system, or a combination of those outcomes. Science is an academic content area that has the potential to enhance behavioral and academic success of students with EBD. Researchers, nonprofits, and business leaders have provided an impetus for nationwide reform in science education. Concurrently, a corpus of legislation has influenced the preparation of new teachers to use evidence-based teaching practices while addressing the needs of an increasingly diverse student population. Using technology is one way that teacher educators are providing in-vivo learning experiences to new teachers during their classroom instruction. A multiple-baseline across-participants research study was used to examine the effectiveness of providing immediate feedback (within three seconds) to novice general science educators to increase their use of an evidence-based teaching strategy, known as a three-term contingency (TTC) trial while they taught. Feedback was delivered via Bug-in-the-Ear (BIE) technology and during whole-class instruction in which students with EBD were included. The teacher participants wore a Bluetooth earpiece, which served as a vehicle for audio communication with the investigator. Teachers were observed via web camera over the Adobe(&)#174;ConnectTM online conferencing platform. During the intervention, teachers increased their percentage of completed TTC trials, opportunities to respond, and praise or error correction. Student responses also increased, and maladaptive behaviors decreased.
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Date Issued: 2013
Identifier: CFE0004847, ucf:49681
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0004847

Title: Inquiry as Practice for Continuous Improvement: A Framework for the Curricular Redesign of the Education Doctorate in Curriculum and Instruction Research Continuum at the University of Central Florida.
Creator: Clark, Paola, Boote, David, Vitale, Thomas, Hopp, Carolyn, Swan, Bonnie, University of Central Florida
Abstract / Description: This design-based research study was conducted at the University of Central Florida with the aim of informing the Education Doctorate in Curriculum and Instruction research course sequence within the College of Education and Human Performance. The main purpose of this dissertation was to enhance and enrich the Ed.D. in Curriculum and Instruction research continuum courses to ensure that they support the use of applied research and practical theory as central to the development of scholarly...
Show moreThis design-based research study was conducted at the University of Central Florida with the aim of informing the Education Doctorate in Curriculum and Instruction research course sequence within the College of Education and Human Performance. The main purpose of this dissertation was to enhance and enrich the Ed.D. in Curriculum and Instruction research continuum courses to ensure that they support the use of applied research and practical theory as central to the development of scholarly practitioners. In order to fulfill its purpose, this study addressed three main goals: clarifying the Ed.D. in Curriculum and Instruction program goals, objectives, and research continuum learning outcomes; developing research course sequence curriculum maps; and redesigning sample curriculum units for individual research courses.The curriculum mapping and redesign process was supported by research-based design choices in alignment with the practice-oriented nature of the program. These design choices included the Carnegie Project on the Education Doctorate Working Principles and Design Concepts, in particular the use of Inquiry as Practice as the main redesign framework in combination with improvement science principles. These frameworks were first used as foundations to clarify the Ed.D. in Curriculum and Instruction program goal and overall objectives. Later, user-centered design principles were applied to create faculty and student personas in order to inform the redefinition of individual research course learning outcomes. In addition, the frameworks were used to create alignment matrices and demonstrate where they supported each of the program objectives. This iterative process was carried out simultaneously with the course curriculum map redesign for each of the research continuum courses using backward design principles, the spiral curriculum model, and taking into consideration the most suitable instructional modality for learning outcomes, including the best suited education technology choices. Further, some proposed sample course units were developed in greater detail utilizing Universal Design for Learning principles and the prioritization of learning outcomes. Course contents were selected based on cognitive and reasoning learning theories pertaining to mixed method courses for professional practitioners.The developed prototypes support the continuous Ed.D. in Curriculum and Instruction curriculum redesign efforts of the program and College of Education and Human Performance at the University of Central Florida and clearly distinguish the Ed.D. in Curriculum and Instruction program from traditional, research-based doctorates. Similarly, at the national level, this study also sought to benefit other CPED-influenced professional practice programs, as they also consider the careful redesign of their research or inquiry sequences to define their programs as ones that fully address the needs of advanced professional educators. Acknowledging the limitations of this study, further studies should identifying the motivational, cognitive, and organizational causes affecting student learning outcomes. Implementing and evaluating the prototypes developed to ensure their effectiveness in preparing scholarly practitioners to act as agents of change in their professional practices.
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Date Issued: 2016
Identifier: CFE0006285, ucf:51585
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006285

Title: E.A.I. Anxiety: Technopanic and Post-Human Potential.
Creator: Mandell, Zachary, Brenckle, Martha, Jones, Natasha, Scott, Blake, University of Central Florida
Abstract / Description: Robots have been a part of the imagination of Western culture for centuries. The possibility for automation and artificial life has inspired the curiosity of thinkers like Leonardo Da Vinci who once designed a mechanical knight. It wasn't until the 19th century that automated machinery has become realized. The confrontation between human and automation has inspired a fear, referred to as (")technopanic("), that has been exacerbated in tandem with the evolution of technology. This thesis seeks...
Show moreRobots have been a part of the imagination of Western culture for centuries. The possibility for automation and artificial life has inspired the curiosity of thinkers like Leonardo Da Vinci who once designed a mechanical knight. It wasn't until the 19th century that automated machinery has become realized. The confrontation between human and automation has inspired a fear, referred to as (")technopanic("), that has been exacerbated in tandem with the evolution of technology. This thesis seeks to discover the historical precedence for these fears. I explore three modes of knowledge (Philosophy, Economics, and Film Theory) to examine the agendas behind the messages on the topic of Artificial Life, specifically Robots. I then advocate for an alternative philosophy called Post-Humanism. I argue that what is needed to alleviate the fears and anxieties of Western culture is a shift in how humanity views itself and its relation to the natural world. By structuring my thesis in this way, I identify the roots of Western humanity's anthropocentric ontology first, explore the economic implications of automation second, analyze the cultural anticipations of artificial life in Western media third, and finally offer an alternative attitude and ethic as a way out of the pre-established judgments that do little to protect Western culture from E.A.I.
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Date Issued: 2018
Identifier: CFE0007049, ucf:52022
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0007049

Title: DESIGN AND CHARACTERIZATION OF NOVELDEVICES FOR NEW GENERATION OF ELECTROSTATICDISCHARGE (ESD) PROTECTION STRUCTURES.
Creator: SALCEDO, Javier, Liou, Juin, University of Central Florida
Abstract / Description: The technology evolution and complexity of new circuit applications involve emerging reliability problems and even more sensitivity of integrated circuits (ICs) to electrostatic discharge (ESD)-induced damage. Regardless of the aggressive evolution in downscaling and subsequent improvement in applications' performance, ICs still should comply with minimum standards of ESD robustness in order to be commercially viable. Although the topic of ESD has received attention industry-wide, the...
Show moreThe technology evolution and complexity of new circuit applications involve emerging reliability problems and even more sensitivity of integrated circuits (ICs) to electrostatic discharge (ESD)-induced damage. Regardless of the aggressive evolution in downscaling and subsequent improvement in applications' performance, ICs still should comply with minimum standards of ESD robustness in order to be commercially viable. Although the topic of ESD has received attention industry-wide, the design of robust protection structures and circuits remains challenging because ESD failure mechanisms continue to become more acute and design windows less flexible. The sensitivity of smaller devices, along with a limited understanding of the ESD phenomena and the resulting empirical approach to solving the problem have yielded time consuming, costly and unpredictable design procedures. As turnaround design cycles in new technologies continue to decrease, the traditional trial-and-error design strategy is no longer acceptable, and better analysis capabilities and a systematic design approach are essential to accomplish the increasingly difficult task of adequate ESD protection-circuit design. This dissertation presents a comprehensive design methodology for implementing custom on-chip ESD protection structures in different commercial technologies. First, the ESD topic in the semiconductor industry is revised, as well as ESD standards and commonly used schemes to provide ESD protection in ICs. The general ESD protection approaches are illustrated and discussed using different types of protection components and the concept of the ESD design window. The problem of implementing and assessing ESD protection structures is addressed next, starting from the general discussion of two design methods. The first ESD design method follows an experimental approach, in which design requirements are obtained via fabrication, testing and failure analysis. The second method consists of the technology computer aided design (TCAD)-assisted ESD protection design. This method incorporates numerical simulations in different stages of the ESD design process, and thus results in a more predictable and systematic ESD development strategy. Physical models considered in the device simulation are discussed and subsequently utilized in different ESD designs along this study. The implementation of new custom ESD protection devices and a further integration strategy based on the concept of the high-holding, low-voltage-trigger, silicon controlled rectifier (SCR) (HH-LVTSCR) is demonstrated for implementing ESD solutions in commercial low-voltage digital and mixed-signal applications developed using complementary metal oxide semiconductor (CMOS) and bipolar CMOS (BiCMOS) technologies. This ESD protection concept proposed in this study is also successfully incorporated for implementing a tailored ESD protection solution for an emerging CMOS-based embedded MicroElectroMechanical (MEMS) sensor system-on-a-chip (SoC) technology. Circuit applications that are required to operate at relatively large input/output (I/O) voltage, above/below the VDD/VSS core circuit power supply, introduce further complications in the development and integration of ESD protection solutions. In these applications, the I/O operating voltage can extend over one order of magnitude larger than the safe operating voltage established in advanced technologies, while the IC is also required to comply with stringent ESD robustness requirements. A practical TCAD methodology based on a process- and device- simulation is demonstrated for assessment of the device physics, and subsequent design and implementation of custom P1N1-P2N2 and coupled P1N1-P2N2//N2P3-N3P1 silicon controlled rectifier (SCR)-type devices for ESD protection in different circuit applications, including those applications operating at I/O voltage considerably above/below the VDD/VSS. Results from the TCAD simulations are compared with measurements and used for developing technology- and circuit-adapted protection structures, capable of blocking large voltages and providing versatile dual-polarity symmetric/asymmetric S-type current-voltage characteristics for high ESD protection. The design guidelines introduced in this dissertation are used to optimize and extend the ESD protection capability in existing CMOS/BiCMOS technologies, by implementing smaller and more robust single- or dual-polarity ESD protection structures within the flexibility provided in the specific fabrication process. The ESD design methodologies and characteristics of the developed protection devices are demonstrated via ESD measurements obtained from fabricated stand-alone devices and on-chip ESD protections. The superior ESD protection performance of the devices developed in this study is also successfully verified in IC applications where the standard ESD protection approaches are not suitable to meet the stringent area constraint and performance requirement.
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Date Issued: 2006
Identifier: CFE0001213, ucf:46942
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001213

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