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- Title
- SEEKING A VISION, FINDING A VOICE: EXPLORING THE MUSICALITY OF THEATRE THROUGH MULTIDISCIPLINARY PRACTICE.
- Creator
-
Kromer, Tara, Weaver, Earl, Wood, Vandy, Chicurel, Steven, Mark, Mark, University of Central Florida
- Abstract / Description
-
In classrooms and textbooks the (")Director's Vision(") is often identified as the unifying concept for the production, and my goal in returning to graduate school was to explore my own vision as a director. In my own practice as a director, I tend to (")hear(") the play in my head before visualizing it. From my interpretation of the text, to the staging of the performers, to my collaboration with design team, my approach to the production of theatre stems from a place of musicality. Seeking...
Show moreIn classrooms and textbooks the (")Director's Vision(") is often identified as the unifying concept for the production, and my goal in returning to graduate school was to explore my own vision as a director. In my own practice as a director, I tend to (")hear(") the play in my head before visualizing it. From my interpretation of the text, to the staging of the performers, to my collaboration with design team, my approach to the production of theatre stems from a place of musicality. Seeking a Vision, Finding a Voice explores my creative journey as multi-disciplinary theatre artist through a series of case studies detailing my practice as a Director/ Sound Designer. It examines my evolving process, which often utilizes audio collage to shape the dramatic arc of a piece or scene, experiments with using music to inform character, emotion, and movement, and values the impulses of the cast and creative team as important collaborative resources. By detailing my process on three productions (as Director/ Sound Designer of the University of Central Florida's Theatre for Young Audience's Tour, Emily Freeman's And Then Came Tango, as the Assistant Director/ Dramaturg/ Sound Designer for UCF's production of Paula Vogel's The Baltimore Waltz, and as the Director/ Sound Designer of John Patrick Shanley's Doubt: A Parable, for Titusville Playhouse, Inc.), my process as director/designer is critically analyzed and reflected upon. Through my analysis, I explore the benefits and challenges of being a Director-who-Designs and a Designer-who-Directs, utilizing aural dramaturgy, collaboration, rhythm and emotion as essential tools in practicing theatre production. Seeking a Vision, Finding a Voice reflects on my practice through the lens of David Roesner's Musicality as a Paradigm for the Theatre: A Kind of Manifesto, analyzing the ways in which the 'notion of musicality' was exemplified in the preparation, performance, and perception of my work. This thesis examines the benefits and challenges of multidisciplinary artistry, pondering the merits and pitfalls of taking on multiple roles in each of my processes. It further explores the impact applying musicality to theatre practice can have on both actors and audiences and cherishes sound design as a valuable tool capable of enriching theatrical storytelling.
Show less - Date Issued
- 2015
- Identifier
- CFE0005642, ucf:50202
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005642
- Title
- INSTITUTIONAL DESIGN AND ECONOMIC INEQUALITY: SOCIOECONOMIC ACTORS AND PUBLIC POLICY IN GERMANY AND THE UNITED STATES.
- Creator
-
Hudson, Jennifer, Kinsey, Barbara, University of Central Florida
- Abstract / Description
-
In this thesis I conduct a comparative analysis of the influence of socioeconomic actors, business and labor, on public policy in Germany and the United States, specifically public policy that has an impact on economic inequality. The objective of this study is to gain a better understanding of how institutional constructs may determine the level of influence by different socioeconomic actors on public policy. In particular, I examine the link between institutional design and economic...
Show moreIn this thesis I conduct a comparative analysis of the influence of socioeconomic actors, business and labor, on public policy in Germany and the United States, specifically public policy that has an impact on economic inequality. The objective of this study is to gain a better understanding of how institutional constructs may determine the level of influence by different socioeconomic actors on public policy. In particular, I examine the link between institutional design and economic inequality, specifically the relative influence of business interests in varying types of capitalist economies and democratic systems, and assess those facets of institutional design that may facilitate the channeling of business influence in policy making. I explore institutional changes in the German political and economic system beginning in the late 1980s to determine whether these changes have altered the policy making process over time, and analyze similarities with institutional changes that have taken place in the United States beginning in the late 1970s to present. Further, I examine whether shifts in institutional design indicate that the German system is transitioning towards a more liberal model similar to that of the United States, and consider what effects this may have on the level of economic inequality in Germany. To conduct my analysis I use the Institutional Analysis and Development (IAD) framework; based on the IAD framework I create a conceptual map of the channels by which socioeconomic actors are involved in the policy making process. I evaluate the policy-making process in both formal and informal policy arenas. The policy areas analyzed include corporate governance, industrial relations, and tax, welfare and minimum wage policy during the selected time periods. The analysis shows that the institutional designs that produced the selected policies benefit business interests and may contribute towards economic inequality. The larger goal is to develop research that will build a theoretical foundation to help us identify how these systems may be improved to produce a more equitable allocation of economic resources.
Show less - Date Issued
- 2014
- Identifier
- CFH0004690, ucf:45243
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004690
- Title
- Semiconductor Design and Manufacturing Interplay to Achieve Higher Yields at Reduced Costs using SMART Techniques.
- Creator
-
Oberai, Ankush Bharati, Yuan, Jiann-Shiun, Abdolvand, Reza, Georgiopoulos, Michael, Sundaram, Kalpathy, Reilly, Charles, University of Central Florida
- Abstract / Description
-
Since the outset of IC Semiconductor market there has been a gap between its design and manufacturing communities. This gap continued to grow as the device geometries started to shrink and the manufacturing processes and tools got more complex. This gap lowered the manufacturing yield, leading to higher cost of ICs and delay in their time to market. It also impacted performance of the ICs, impacting the overall functionality of the systems they were integrated in. However, in the recent years...
Show moreSince the outset of IC Semiconductor market there has been a gap between its design and manufacturing communities. This gap continued to grow as the device geometries started to shrink and the manufacturing processes and tools got more complex. This gap lowered the manufacturing yield, leading to higher cost of ICs and delay in their time to market. It also impacted performance of the ICs, impacting the overall functionality of the systems they were integrated in. However, in the recent years there have been major efforts to bridge the gap between design and manufacturing using software solutions by providing closer collaborations techniques between design and manufacturing communities. The root cause of this gap is inherited by the difference in the knowledge and skills required by the two communities. The IC design community is more microelectronics, electrical engineering and software driven whereas the IC manufacturing community is more driven by material science, mechanical engineering, physics and robotics. The cross training between the two is almost nonexistence and not even mandated. This gap is deemed to widen, with demand for more complex designs and miniaturization of electronic appliance-products. Growing need for MEMS, 3-D NANDS and IOTs are other drivers that could widen the gap between design and manufacturing. To bridge this gap, it is critical to have close loop solutions between design and manufacturing This could be achieved by SMART automation on both sides by using Artificial Intelligence, Machine Learning and Big Data algorithms. Lack of automation and predictive capabilities have even made the situation worse on the yield and total turnaround times. With the growing fabless and foundry business model, bridging the gap has become even more critical. Smart Manufacturing philosophy must be adapted to make this bridge possible. We need to understand the Fab-fabless collaboration requirements and the mechanism to bring design to the manufacturing floor for yield improvement. Additionally, design community must be educated with manufacturing process and tool knowledge, so they can design for improved manufacturability. This study will require understanding of elements impacting manufacturing on both ends of the design and manufacturing process. Additionally, we need to understand the process rules that need to be followed closely in the design phase. Best suited SMART automation techniques to bridge the gap need to be studied and analyzed for their effectiveness.
Show less - Date Issued
- 2018
- Identifier
- CFE0007351, ucf:52096
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007351
- Title
- LIGHTING DESIGN FOR FROM SUN TO SUN: A DAY IN A RAILROAD CAMP.
- Creator
-
Szewczyk, Nathan, Scott, Bert, University of Central Florida
- Abstract / Description
-
In this thesis the notion of a theoretical approach to the beginning stages of designing lighting for a theatrical production will be discussed. The topic being researched is: How a theoretical approach to entering the design process will enhance the final lighting design. The target audience for this study is theatrical lighting designers. A theoretical approach, in this case to the beginning of the design process, could be described as utilizing current dramatic theories to develop a better...
Show moreIn this thesis the notion of a theoretical approach to the beginning stages of designing lighting for a theatrical production will be discussed. The topic being researched is: How a theoretical approach to entering the design process will enhance the final lighting design. The target audience for this study is theatrical lighting designers. A theoretical approach, in this case to the beginning of the design process, could be described as utilizing current dramatic theories to develop a better understanding for the design of this production. In order to better understand this topic one would need to know how the process of lighting design is typically created and where the theoretical approach is implemented. An issue with this approach is that the short period allowed for the design process does not allow sufficient time to utilize a theoretical approach in a real world setting. A way of determining if this process is effective is through personal self review. Journaling and discussion with my advisor for this production will be the method of data collection. The method of validation will be a self reflection at the end of the final performance. An issue with the collection process is its reliance on personal opinions, including the author's. There are no ethical issues relating to this study. When applied, a theoretical approach to the design process will enhance the quality of the final lighting design through allowing the designer to be better prepared for a specific scene that he/she is struggling with.
Show less - Date Issued
- 2011
- Identifier
- CFE0003609, ucf:48874
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003609
- Title
- INELASTIC DYNAMIC BEHAVIOR AND DESIGN OF HYBRID COUPLED WALL SYSTEMS.
- Creator
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Hassan, Mohamed Ali, El-Tawil, Sherif, University of Central Florida
- Abstract / Description
-
A key consideration in seismic design of buildings is to ensure that the lateral load resisting system has an appropriate combination of strength, stiffness and energy dissipation capacity. Hybrid coupled wall systems, in which steel beams are used to couple two or more reinforced concrete shear walls in series, can be designed to have these attributes and therefore have the potential to deliver good performance under severe seismic loading. This research presents an investigation of the...
Show moreA key consideration in seismic design of buildings is to ensure that the lateral load resisting system has an appropriate combination of strength, stiffness and energy dissipation capacity. Hybrid coupled wall systems, in which steel beams are used to couple two or more reinforced concrete shear walls in series, can be designed to have these attributes and therefore have the potential to deliver good performance under severe seismic loading. This research presents an investigation of the seismic behavior of this type of structural system. System response of 12- and 18-story high prototypes is studied using transient finite element analyses that accounts for the most important aspects of material nonlinear behavior including concrete cracking, tension stiffening, and compressive behavior for both confined and unconfined concrete as well as steel yielding. The developed finite element models are calibrated using more detailed models developed in previous research and are validated through numerous comparisons with test results of reinforced concrete walls and wall-beam subassemblages. Suites of transient inelastic analyses are conducted to investigate pertinent parameters including hazard level, earthquake record scaling, dynamic base shear magnification, interstory drift, shear distortion, coupling beam plastic rotation, and wall rotation. Different performance measures are proposed to judge and compare the behavior of the various systems. The analyses show that, in general, hybrid coupled walls are particularly well suited for use in regions of high seismic risk. The results of the dynamic analyses are used to judge the validity of and to refine a previously proposed design method based on the capacity design concept and the assumption of behavior dominated by the first vibration mode. The adequacy of design based on the pushover analysis procedure as promoted in FEMA-356 (2000) is also investigated using the dynamic analysis results. Substantial discrepancies between both methods are observed, especially in the case of the 18-story system. A critical assessment of dynamic base shear magnification is also conducted, and a new method for estimating its effects is suggested. The method is based on a modal combination procedure that accounts for presence of a plastic hinge at the wall base. Finally, the validity of limitations in FEMA-368 (2000) on building height, particularly for hybrid coupled wall systems, is discussed.
Show less - Date Issued
- 2004
- Identifier
- CFE0000047, ucf:46086
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000047
- Title
- PATCHWORK CULTURE: QUILT TACTICS AND DIGITEXTUALITY.
- Creator
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Barrett Ferrier, Michelle, Saper, Craig, University of Central Florida
- Abstract / Description
-
Embedded in the quilt top, the fabric patches are relays, time pathways to stories and memories of their former owners. Through the quilts, the voices of the past survive. The stories trace a path of connection between oral traditions, storytelling, the invention of meaning, and the preservation of cultural memory. The theory and method described herein use the quilt patchwork metaphor as the basis for a web interface for designing and modeling knowledge-based graphical, narrative, and...
Show moreEmbedded in the quilt top, the fabric patches are relays, time pathways to stories and memories of their former owners. Through the quilts, the voices of the past survive. The stories trace a path of connection between oral traditions, storytelling, the invention of meaning, and the preservation of cultural memory. The theory and method described herein use the quilt patchwork metaphor as the basis for a web interface for designing and modeling knowledge-based graphical, narrative, and multimedia data. More specifically, the method comprises a digital storytelling and knowledge management tool that allows one or more users to create, save, store, and visually map or model digital stories. The method creates a digital network of a community's stories for digital ethnography work. Digital patches that represent the gateway to the stories of an individual are pieced together into a larger quilt design, creating a visual space that yields the voices of its creators at the click of a mouse. Through this narrative mapping, users are able to deal with complexity, ambiguity, density, and information overload. The method takes the traditional quilt use and appropriates it into a digital apparatus so that the user is connected to multiple points of view that can be dynamically tried out and compared. The hypertextual quilting method fulfills the definition of a deconstructive hypertext and emancipatory social science research methodologies by creating a collaborative, polyvocal interface where users have access to the code, content and conduits to rewrite culture's history with subaltern voices. In this digital place of intertextuality, stories are juxtaposed with images in a montage that denies the authority of a single voice and refuses fixed meaning. In dialogue, contestation, and play, the digitextuality of the Digital Story Quilt provides a praxis for critical theory. The Digital Story Quilt method concerns itself with questions of identity, the processes through which these identities are developed, the mechanics of processes of privilege and marginalization and the possibility of political action through narrative performance against these processes.
Show less - Date Issued
- 2007
- Identifier
- CFE0001659, ucf:47239
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001659
- Title
- OPTIMIZING THE LEVEL OF CUSTOMIZATION FOR PRODUCTS IN MASS CUSTOMIZATION SYSTEMS.
- Creator
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Spahi, Sami, Hosni, Yasser, University of Central Florida
- Abstract / Description
-
Mass customization (MC) was developed to capitalize on the combined benefits of economies of scale and economies of scope. Balancing the tradeoffs involved in an MC system warrants the determination of the degree or the extent of customization. Most of the literature views the degree of customization as how early or how far the customer is integrated in the production cycle, which is defined as the order decoupling point. In this study we are addressing the degree of customization from a...
Show moreMass customization (MC) was developed to capitalize on the combined benefits of economies of scale and economies of scope. Balancing the tradeoffs involved in an MC system warrants the determination of the degree or the extent of customization. Most of the literature views the degree of customization as how early or how far the customer is integrated in the production cycle, which is defined as the order decoupling point. In this study we are addressing the degree of customization from a product structural perspective. There are two objectives in this research. The first is to develop a unit of measurement for the degree of customization of a product in an MC system. The second is to construct an optimization model to determine the level of customization that would best satisfy the organizational goals. The term "Magnitude of Customization" (MOC) has been introduced as a measuring unit for the degree of customization on a customization scale (CS). The MOC is based on the number of module options or the extent of customizable features per component in a product. To satisfy the second objective, an analytical model based on preemptive goal programming was developed. The model optimizes the solution as to how far an organization should customize a product to best satisfy its strategic goals. The model considers goals such as increasing the market share, and attaining a higher level of customer satisfaction, while keeping the risk or budget below a certain amount. A step-by-step algorithm is developed for the model application. A case study of an aluminum windows and doors company is used to verify and validate the model. A double panel sliding window is selected as the subject of our study. Information related to company goals and objectives vis-à-vis customization is gathered, through interviews and questionnaires, from the upper management including Operations, Marketing, and Finance Departments. The Window design and technical information are collected from the Manufacturing Department. The model and its solution provided specific recommendations on what to customize and to what degree to best satisfy primary strategic goals for the organization. Results from the model application shows that the company is able to meet the five goals that they had identified with two goals having a deviation of 4.7% and 6.6% from the targets. To achieve the stated goals, the model recommends an overall degree of customization of approximately 32.23% and delineates that to the component and feature levels. For validation, the model results are compared to the actual status of the company and the manufacturer's recommendation without prior information about the model outcome. The average difference, for attaining the same goals, is found to be 6.05%, at a standard deviation of 6.02% and variance of 36.29%, which is considered adequately close. The proposed model presents a framework that combines various research efforts into a flexible but encompassing method that can provide decision-makers with essential production planning guidelines in an MC setup. Finally, suggestions are provided as to how the model can be expanded and refined to include goal formulations that accommodate potential MC systems and technology advances. To the best of our knowledge, this research is a pioneer in quantifying customization in an MC environment and relating it to the organizational goals through modeling and optimization.
Show less - Date Issued
- 2008
- Identifier
- CFE0002197, ucf:47902
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002197
- Title
- In-Memory Computing Using Formal Methods and Paths-Based Logic.
- Creator
-
Velasquez, Alvaro, Jha, Sumit Kumar, Leavens, Gary, Wu, Annie, Subramani, K., University of Central Florida
- Abstract / Description
-
The continued scaling of the CMOS device has been largely responsible for the increase in computational power and consequent technological progress over the last few decades. However, the end of Dennard scaling has interrupted this era of sustained exponential growth in computing performance. Indeed, we are quickly reaching an impasse in the form of limitations in the lithographic processes used to fabricate CMOS processes and, even more dire, we are beginning to face fundamental physical...
Show moreThe continued scaling of the CMOS device has been largely responsible for the increase in computational power and consequent technological progress over the last few decades. However, the end of Dennard scaling has interrupted this era of sustained exponential growth in computing performance. Indeed, we are quickly reaching an impasse in the form of limitations in the lithographic processes used to fabricate CMOS processes and, even more dire, we are beginning to face fundamental physical phenomena, such as quantum tunneling, that are pervasive at the nanometer scale. Such phenomena manifests itself in prohibitively high leakage currents and process variations, leading to inaccurate computations. As a result, there has been a surge of interest in computing architectures that can replace the traditional CMOS transistor-based methods. This thesis is a thorough investigation of how computations can be performed on one such architecture, called a crossbar. The methods proposed in this document apply to any crossbar consisting of two-terminal connective devices. First, we demonstrate how paths of electric current between two wires can be used as design primitives in a crossbar. We then leverage principles from the field of formal methods, in particular the area of bounded model checking, to automate the synthesis of crossbar designs for computing arithmetic operations. We demonstrate that our approach yields circuits that are state-of-the-art in terms of the number of operations required to perform a computation. Finally, we look at the benefits of using a 3D crossbar for computation; that is, a crossbar consisting of multiple layers of interconnects. A novel 3D crossbar computing paradigm is proposed for solving the Boolean matrix multiplication and transitive closure problems and we show how this paradigm can be utilized, with small modifications, in the XPoint crossbar memory architecture that was recently announced by Intel.
Show less - Date Issued
- 2018
- Identifier
- CFE0007419, ucf:52720
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007419
- Title
- Effects of Electronic Media Messages on the Perceived Self-Efficacy of Pedestrian Commuters Living in the Unincorporated Central Florida Community of Conway.
- Creator
-
Stephens, Daniel, Yu, Chia-Yuan, Martin, Lawrence, Hawkins, Christopher, Seigler, Daniel, University of Central Florida
- Abstract / Description
-
Urban pedestrianism is increasingly perceived as a dangerous form of travel. While roadway design has been historically scaled to cars instead of people, planning professionals are now re-thinking their approach to make roads more inclusive for all travelers. Scholars, however, have learned harbored fear can trump behavior even under ideal travel conditions. Such fear can adversely impact perceived pedestrian self-efficacy, which is the self-generated internal assessment or belief in a...
Show moreUrban pedestrianism is increasingly perceived as a dangerous form of travel. While roadway design has been historically scaled to cars instead of people, planning professionals are now re-thinking their approach to make roads more inclusive for all travelers. Scholars, however, have learned harbored fear can trump behavior even under ideal travel conditions. Such fear can adversely impact perceived pedestrian self-efficacy, which is the self-generated internal assessment or belief in a traveler's agentive abilities to navigate the travel environment. The challenge thus becomes twofold: improve the built environment while bolstering traveler confidence. The following study, therefore, employed a qualitative phenomenological research design to ascertain the concerns and perceptions of vulnerable travelers as it pertained to and was affected by travel-specific media. The study employed denizens selected from the Central Florida community of Conway, who were interviewed using a multi-method approach employing a semi-structured interview technique utilizing individual interviews and small focus group sessions. Using Social Cognitive Theory (SCT) as the theoretical framework, the researcher studied and documented the elements contributing to the perceptions of pedestrian travelers. The rationale for this approach is found in the dynamic relationships that exist between the objective travel environment, the perceived travel environment, and travel behavior (-) all representing the triad of cognition, the external environment, and social stimuli, which encompass Bandura's Triadic Reciprocal Determinism (TRD). The four themes that emerged from the data analysis (-) communication, safety, cost, and happiness (-) characterize the experiences of the participants as they watched positively-themed media images modeling civil travel behavior. This research adds to existing literature on the magnitude such themes have on perception, to include latent perceptions harbored by pedestrian commuters concerning dangers (-) real or imagined (-) of traveling on local roadways.
Show less - Date Issued
- 2018
- Identifier
- CFE0007376, ucf:52100
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007376
- Title
- DESIGN OF HIGH EFFICIENCY BRUSHLESS PERMANENT MAGNET MACHINES AND DRIVER SYSTEM.
- Creator
-
He, Chengyuan, Wei, Lei, Sundaram, Kalpathy, Zhou, Qun, Jin, Yier, Zou, Shengli, University of Central Florida
- Abstract / Description
-
The dissertation is concerned with the design of high-efficiency permanent magnet synchronous machinery and the control system. The dissertation first talks about the basic concept of the permanent magnet synchronous motor (PMSM) design and the mathematics design model of the advanced design method. The advantage of the design method is that it can increase the high load capacity at no cost of increasing the total machine size. After that, the control method of the PMSM and Permanent magnet...
Show moreThe dissertation is concerned with the design of high-efficiency permanent magnet synchronous machinery and the control system. The dissertation first talks about the basic concept of the permanent magnet synchronous motor (PMSM) design and the mathematics design model of the advanced design method. The advantage of the design method is that it can increase the high load capacity at no cost of increasing the total machine size. After that, the control method of the PMSM and Permanent magnet synchronous generator (PMSG) is introduced. The design, simulation, and test of a permanent magnet brushless DC (BLDC) motor for electric impact wrench and new mechanical structure are first presented based on the design method. Finite element analysis based on the Maxwell 2D is built to optimize the design and the control board is designed using Altium Designer. Both the motor and control board have been fabricated and tested to verify the design. The electrical and mechanical design are combined, and it provides an analytical IPMBLDC design method and an innovative and reasonable mechanical dynamical calculation method for the impact wrench system, which can be used in whole system design of other functional electric tools. A 2kw high-efficiency alternator system and its control board system are also designed, analyzed and fabricated applying to the truck auxiliary power unit (APU). The alternator system has two stages. The first stage is that the alternator three-phase outputs are connected to the three-phase active rectifier to get 48V DC. An advanced Sliding Mode Observer (SMO) is used to get an alternator position. The buck is used for the second stage to get 14V DC output. The whole system efficiency is much higher than the traditional system using induction motor.
Show less - Date Issued
- 2018
- Identifier
- CFE0007334, ucf:52135
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007334
- Title
- Analysis, Design and Efficiency Optimization of Power Converters for Renewable Energy Applications.
- Creator
-
Chen, Xi, Batarseh, Issa, Zhou, Qun, Mikhael, Wasfy, Sun, Wei, Kutkut, Nasser, University of Central Florida
- Abstract / Description
-
DC-DC power converters are widely used in renewable energy-based power generation systems due to the constant demand of high-power density and high-power conversion efficiency. DC-DC converters can be classified into non-isolated and isolated topologies. For non-isolated topologies, they are typically derived from buck, boost, buck-boost or forth order (such as Cuk, Sepic and Zeta) converters and they usually have relatively higher conversion efficiency than isolated topologies. However, with...
Show moreDC-DC power converters are widely used in renewable energy-based power generation systems due to the constant demand of high-power density and high-power conversion efficiency. DC-DC converters can be classified into non-isolated and isolated topologies. For non-isolated topologies, they are typically derived from buck, boost, buck-boost or forth order (such as Cuk, Sepic and Zeta) converters and they usually have relatively higher conversion efficiency than isolated topologies. However, with the applications where the isolation is required, either these topologies should be modified, or alternative topologies are needed. Among various isolated DC-DC converters, the LLC resonant converter is an attractive selection due to its soft switching, isolation, wide gain range, high reliability, high power density and high conversion efficiency.In low power applications, such as battery chargers and solar microinverters, increasing the switching frequency can reduce the size of passive components and reduce the current ripple and root-mean-square (RMS) current, resulting in higher power density and lower conduction loss. However, switching losses, gate driving loss and electromagnetic interference (EMI) may increase as a consequence of higher switching frequency. Therefore, switching frequency modulation, components optimization and soft switching techniques have been proposed to overcome these issues and achieve a tradeoff to reach the maximum conversion efficiency.This dissertation can be divided into two categories: the first part is focusing on the well-known non-isolated bidirectional cascaded-buck-boost converter, and the second part is concentrating on the isolated dual-input single resonant tank LLC converter. Several optimization approaches have been presented to improve the efficiency, power density and reliability of the power converters. In the first part, an adaptive switching frequency modulation technique has been proposed based on the precise loss model in this dissertation to increase the efficiency of the cascaded-buck-boost converter. In adaptive switching frequency modulation technique, the optimal switching frequency for the cascaded-buck-boost converter is adaptively selected to achieve the minimum total power loss. In addition, due to the major power losses coming from the inductor, a new low profile nanocrystalline inductor filled with copper foil has been designed to significantly reduce the core loss and winding loss. To further improve the efficiency of the cascaded-buck-boost converter, the adaptive switching frequency modulation technique has been applied on the converter with designed nanocrystalline inductor, in which the peak efficiency of the converter can break the 99% bottleneck.In the second part, a novel dual-input DC-DC converter is developed according to the LLC resonant topology. This design concept minimizes the circuit components by allowing single resonant tank to interface with multiple input sources. Based on different applications, the circuit configuration for the dual-input LLC converter will be a little different. In order to improve the efficiency of the dual-input LLC converter, the semi-active rectifiers have been used on the transformer secondary side to replace the low-side bridge diodes. In this case, higher magnetizing inductance can be selected while maintaining the same voltage gain. Besides, a burst-mode control strategy has been proposed to improve the light load and very light load efficiency of the dual- input LLC converter. This control strategy is able to be readily implemented on any power converter since it can be achieved directly through firmware and no circuit modification is needed in implementation of this strategy.
Show less - Date Issued
- 2019
- Identifier
- CFE0007612, ucf:52531
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007612
- Title
- Classroom Error Climate: Teacher Professional Development to Improve Student Motivation.
- Creator
-
O'Dell, Sean, Gill, Michele, Cox, Dr. Thomas, Hoffman, Bobby, Flanigan, Jacquelyn, University of Central Florida
- Abstract / Description
-
Student motivation and achievement are often low for students from low socioeconomic status households and may decline when children from all walks of life enter middle school. Despite years of studies describing these declines and efforts to improve learning outcomes, the trends continue. Motivation has been studied from several theoretical standpoints, among them, self-efficacy, beliefs, goal orientations, and emotions. This dissertation introduces error orientation: how teachers and...
Show moreStudent motivation and achievement are often low for students from low socioeconomic status households and may decline when children from all walks of life enter middle school. Despite years of studies describing these declines and efforts to improve learning outcomes, the trends continue. Motivation has been studied from several theoretical standpoints, among them, self-efficacy, beliefs, goal orientations, and emotions. This dissertation introduces error orientation: how teachers and students react to and use errors in the classroom. A positive error orientation, one that views errors as opportunities to learn rather than punishments, may help improve students' emotions, self-efficacy, and future goal orientations, while aligning their beliefs in a more adaptive direction, thus reducing maladaptive academic motivation. A professional development design is proposed here to train teachers in using errors to the advantage of the learner by creating a positive error climate in their classrooms.
Show less - Date Issued
- 2015
- Identifier
- CFE0005856, ucf:50917
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005856
- Title
- Site-Embedded Professional Development as a Means to Increase Teachers' Sense of Efficacy: Lessons from a Middle School Quasi-Experimental Study.
- Creator
-
Roy, Melissa, Gill, Michele, Allen, Kay, Hutchinson, Cynthia, Dehlinger, Robin, University of Central Florida
- Abstract / Description
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The purpose of this quasi-experimental study was to provide site-embedded professional development and coaching support to middle school teachers in an attempt to increase their sense of efficacy for teaching even the most difficult students. The entire faculty (64 teachers) at Jordan Ridge Middle School participated in this intervention. The theoretical framework used to guide this study was conceptual change theory (Pintrich, Marx, (&) Boyle, 1993); specifically, Gregoire's (2003) Cognitive...
Show moreThe purpose of this quasi-experimental study was to provide site-embedded professional development and coaching support to middle school teachers in an attempt to increase their sense of efficacy for teaching even the most difficult students. The entire faculty (64 teachers) at Jordan Ridge Middle School participated in this intervention. The theoretical framework used to guide this study was conceptual change theory (Pintrich, Marx, (&) Boyle, 1993); specifically, Gregoire's (2003) Cognitive-Affective Model of Conceptual Change (CAMCC) informed the design and interpretation of the intervention. A 33-item adaptation of the Teachers' Sense of Efficacy Scale (TSES, Tschannen-Moran and Hoy, 2007) served as a quantitative measure and was administered to teachers at Jordan Ridge Middle School as a pre- and post- test. The same measure was administered to teachers at a neighboring school with similar demographics as a post-test to serve as a comparison. Additionally, qualitative data were gathered in the form of survey open response questions as well as monthly end-of class reflections in order to further illuminate the quantitative findings. The study's findings indicate that providing targeted, responsive, collaborative professional learning opportunities to teachers in the context of their own school may favorably influence their sense of efficacy. This study has practical and theoretical implications for the ways in which K12 teachers are provided opportunities for professional learning and growth.
Show less - Date Issued
- 2016
- Identifier
- CFE0006383, ucf:51538
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006383
- Title
- A Simulation-Based Evaluation Of Efficiency Strategies For A Primary Care Clinic With Unscheduled Visits.
- Creator
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Bobbie, Afrifah, Karwowski, Waldemar, Thompson, William, Elshennawy, Ahmad, Mikusinski, Piotr, University of Central Florida
- Abstract / Description
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In the health care industry, there are strategies to remove inefficiencies from the health delivery process called efficiency strategies. This dissertation proposed a simulation model to evaluate the impact of the efficiency strategies on a primary care clinic with unscheduled "walk-in" patient visits. The simulation model captures the complex characteristics of the Orlando Veteran's Affairs Medical Center (VAMC) primary care clinic. This clinic system includes different types of patients,...
Show moreIn the health care industry, there are strategies to remove inefficiencies from the health delivery process called efficiency strategies. This dissertation proposed a simulation model to evaluate the impact of the efficiency strategies on a primary care clinic with unscheduled "walk-in" patient visits. The simulation model captures the complex characteristics of the Orlando Veteran's Affairs Medical Center (VAMC) primary care clinic. This clinic system includes different types of patients, patient paths, and multiple resources that serve them. Added to the problem complexity is the presence of patient no-shows characteristics and unscheduled patient arrivals, a problem which has been until recently, largely neglected. The main objectives of this research were to develop a model that captures the complexities of the Orlando VAMC, evaluate alternative scenarios to work in unscheduled patient visits, and examine the impact of patient flow, appointment scheduling, and capacity management decisions on the performance of the primary care clinic system. The main results show that only a joint policy of appointment scheduling rules and patient flow decisions has a significant impact on the wait time of scheduled patients. It is recommended that in the future the clinic addresses the problem of serving additional walk-in patients from an integrated scheduling and patient flow viewpoint.
Show less - Date Issued
- 2016
- Identifier
- CFE0006443, ucf:51462
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006443
- Title
- Computational Approach to Electrocatalysis.
- Creator
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Dhakal, Nagendra, Stolbov, Sergey, Rahman, Talat, Ishigami, Masa, Masunov, Artem, University of Central Florida
- Abstract / Description
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The main objective of this work is to understand the theoretical basis of the working principle of the Hydrogen fuel cell. We seek the physical basis of the Rational Design Technique, the smart way of preselecting materials from the material-pool, implemented in our study anticipating highly promising electrocatalysts for promoting the conversion of chemical energy stored in hydrogen molecules into the electrical energy. It needs the understanding of the relationship among the compositions of...
Show moreThe main objective of this work is to understand the theoretical basis of the working principle of the Hydrogen fuel cell. We seek the physical basis of the Rational Design Technique, the smart way of preselecting materials from the material-pool, implemented in our study anticipating highly promising electrocatalysts for promoting the conversion of chemical energy stored in hydrogen molecules into the electrical energy. It needs the understanding of the relationship among the compositions of the materials under consideration, their electronic structure and catalytic activities. We performed the first principle DFT calculations to achieve the goal.Our work is focused first on the issues in hydrogen oxidation reaction taking place in anode compartment of the cell. Next comes up with the issues with Oxygen Reduction Reaction taking place in cathode compartment. Finally, we focus on mechanisms underlying binding of small molecules on substrates.Platinum perfectly catalyzes hydrogen oxidation reaction on the hydrogen fuel cell anodes. However, it has at least two drawbacks: a) it is too expensive; b) it has a low tolerance to CO poisoning. Pt-Ru bi-functional catalysts are more tolerant to CO, but they are still very expensive. In this work, we performed first-principle studies of stability and reactivity of M/W (110) structures, where M = Pd, Ru, Au monolayers. All three systems are found to be stable: formation energy of MLs is significantly higher than cohesive energy of the M-elements. The calculated binding energies of H, H2, OH, CO, and H2O were used to obtain the reaction free energies. Analysis of the free energies suggests that Au-W bonding does not activate sufficiently Au monolayer, whereas Ru/W (110) is still too reactive for the CO removal. Meanwhile, Pd/W (110) is found to catalyze hydrogen oxidation and at the same time to be highly tolerant to the CO poisoning. The latter finding is explained by the fact that CO binds much weaker to Pd on W (110) than to Pt, while the OH binding is strong enough to ensure CO oxidation. The obtained results are traced to the electronic structure of the systems.Oxygen Reduction Reaction (ORR) is the heart core reaction in fuel cells, Proton Exchange Membrane Fuel cell and DEMFC. However, the reaction is not so obvious and need suitable electrocatalyst. Pt or Pt-based catalysts are found to be the best catalyst so far. But, its cost and shortage make it not feasible economically. Moreover, lower onset potential (maximal electrode potential at which the reaction can proceed) of such catalysts is offering another limitation to fuel cell performance. Research has been conducted in many directions for lowering the cost by replacing the Pt with some other elements of lower cost or reducing the Pt-load in the material; and even more finding the material performing better than Pt. In this paper, we've tried to understand the ORR mechanism and look for the material that could be potential option to Pt. Our calculations suggest that for monolayer of Pt on 5 layered slab of Nb or Mo the onset potential is the same as for Pt, while cost of these systems are much lower than that of Pt. Presence of water changes the reaction rate very minimum. Rational design method facilitates the research of selecting the appropriate catalyst and saves time and effort significantly. The result shows that the d-band center model is not accurate to describe the reactivity of the catalyst.For decades, adsorbates' binding energy (????) has been used as an indicator of the adsorbate-substrate bond strength (??????). Thus, although one can compute accurately any ?? models to gauge bond-strength are developed and applied to rationalize and anticipate ????'s because that is a key aspect in the rational search for efficient catalysts. Yet bond-strength alone fails to predict ???? trends. Therefore, quantifying and understanding the difference between ???? and ?????? is essential to catalysts design. Indeed, the adsorbate-substrate bond formation perturbs the substrate's electronic charge density, which reduces ???? by the energy attached to such perturbation: ??????????. Here, with the example of carbon monoxide adsorption on metal-doped graphene, we show that ?????????? may exceed 1 eV and render an unusual situation: although the EB of CO to the Au-doped graphene indicates that binding does not happen, we find evidence of a strong bond between CO and the substrate. Thus, in this case, the large ?????????? totally disrupt the equivalency between ?????? and ???? we also propose a method to compute ?????????? that bypasses dealing with an excited electronic state of the system.
Show less - Date Issued
- 2017
- Identifier
- CFE0006583, ucf:51336
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006583
- Title
- Exploring a Three-Dimensional Narrative Medium: The Theme Park as "De Sprookjessprokkelaar," The Gatherer and Teller of Stories.
- Creator
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Baker, Carissa, McDaniel, Rudy, Salter, Anastasia, Underberg-Goode, Natalie, Hover, Moniek, Dickson, Duncan, University of Central Florida
- Abstract / Description
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This dissertation examines the pervasiveness of storytelling in theme parks and establishes the theme park as a distinct narrative medium. It traces the characteristics of theme park storytelling, how it has changed over time, and what makes the medium unique. This was accomplished using a mixed methods approach drawing data from interviews with creative professionals, archival research, fieldwork, and an analysis of more than eight hundred narrative attractions.The survey of narrative...
Show moreThis dissertation examines the pervasiveness of storytelling in theme parks and establishes the theme park as a distinct narrative medium. It traces the characteristics of theme park storytelling, how it has changed over time, and what makes the medium unique. This was accomplished using a mixed methods approach drawing data from interviews with creative professionals, archival research, fieldwork, and an analysis of more than eight hundred narrative attractions.The survey of narrative attractions revealed the most common narrative expressions to be dark rides and stage shows. Source material tends to be cultural tales (legends, fairy tales) or intellectual properties (generally films). Throughout major periods and world regions, setting, scenes, and visual storytelling are the most ubiquitous narrative devices. Three dozen techniques and technologies are detailed in this project. Significant impetuses for narrative change over time are the advent of technologies, formalization of the industry, explicit discourse on storytelling, formation of design philosophies, and general convergence of media. There are at least a half dozen key distinctions in theme park narratives compared with other mediums: dimensionality, scale, communality, brevity, a combinatory aspect, and a reiterative nature. Also significant is that creative professionals view themselves as storytellers, purposefully design with narrative systems, embed them in spaces, and participate in public dialogue surrounding narrative and design principles.This study was initiated to expand the literature on emerging media and narratives within the Texts and Technology approach and to fill a gap in the scholarship, as designer standpoint is rarely considered in analysis. This is the first large-scale study of storytelling in the global theme park industry. It uses underrepresented creative voices as participants and recognizes their contributions as storytellers. Finally, the project lays the groundwork for future inquiries into theme parks as storytellers and spatial narrative mediums.
Show less - Date Issued
- 2018
- Identifier
- CFE0006973, ucf:51626
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006973
- Title
- Building a Foundation for Goal-Attainment and Problem-Solving in Interdisciplinary Studies: Reimagining Web-Based Core Curriculum through a Classical Lens.
- Creator
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Jardaneh, Said, Fiore, Stephen, Sims, Valerie, McDaniel, Rudy, University of Central Florida
- Abstract / Description
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The core curriculum of interdisciplinary studies undergraduate programs represents interdisciplinarity as a consciously applied process, whether individually or collaboratively, of drawing and integrating insights from various disciplinary perspectives toward complex problem-solving and innovation. At the front-end of these programs students are often introduced to interdisciplinarity through terminology, metaphors, concepts, and context that are intended to familiarize them with the process....
Show moreThe core curriculum of interdisciplinary studies undergraduate programs represents interdisciplinarity as a consciously applied process, whether individually or collaboratively, of drawing and integrating insights from various disciplinary perspectives toward complex problem-solving and innovation. At the front-end of these programs students are often introduced to interdisciplinarity through terminology, metaphors, concepts, and context that are intended to familiarize them with the process. This initiation usually precedes what will ultimately entail a limited number of upper-division courses within the several disciplines or areas that will encompass a unique plan of study characterized by its breadth. The philosophy underlying current pedagogy in interdisciplinary studies appears in many ways to mirror the cognitive habitudes and socio-cultural zeitgeist that have emerged with our increasing connectedness with and reliance on digital technology.This dissertation proposes that through a revised front-end core curriculum revisiting both classical and Ramist pedagogy, and perhaps reframing how we think about interdisciplinarity itself, we need not sacrifice depth for breadth. Rather, we may be able to encourage a broadly applicable self-directed goal-centered mindset in our students that places equal emphasis on both breadth and depth in terms of deliberate knowledge acquisition. Through adapting the initial phases of a cognitivist instructional design model provisional week-by-week, curricular content is presented to illustrate how this endeavor might be realized within the context of interdisciplinary studies or like programs. This core curricular model is intended as an alternative well-suited to both the fully online and mixed mode format as well as the diversity of students within the typical undergraduate interdisciplinary studies program.
Show less - Date Issued
- 2016
- Identifier
- CFE0006120, ucf:51180
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006120
- Title
- The Effects of Synchronous Online Cognitive Strategy Instruction in Writing for Students with Learning Disabilities.
- Creator
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Straub, Carrie, Vasquez, Eleazar, Wienke, Wilfred, Dieker, Lisa, Kaplan, Jeffrey, University of Central Florida
- Abstract / Description
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This study investigates the effects of self-regulated strategy development (Harris, Graham, (&) Mason, 2009) for cognitive strategy instruction in persuasive writing (POW+TREE) using a synchronous online learning environment for special education students. Participants are four adolescent students with learning disabilities (LD) with low achievement in writing. One undergraduate research assistant delivered instruction using a synchronous online platform (e.g., Adobe Connect) in conjunction...
Show moreThis study investigates the effects of self-regulated strategy development (Harris, Graham, (&) Mason, 2009) for cognitive strategy instruction in persuasive writing (POW+TREE) using a synchronous online learning environment for special education students. Participants are four adolescent students with learning disabilities (LD) with low achievement in writing. One undergraduate research assistant delivered instruction using a synchronous online platform (e.g., Adobe Connect) in conjunction with collaborative writing software (e.g., Google Docs word processing). A multiple probe across participants design was used to demonstrate a functional relationship between instruction and number of essay elements (EE). Number of correct minus incorrect word sequences (CIWS) was used as a secondary dependent measure. A non-experimental pre-post design was used to compare the mean performance of holistic writing quality scores and standard scores from the TOWL-3. All four participants gained EE and CIWS from baseline to treatment and demonstrated standard score changes from pre to post-test on the TOWL-3. Implications for writing instruction for students with LD using online learning environments are discussed.
Show less - Date Issued
- 2012
- Identifier
- CFE0004606, ucf:49937
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004606
- Title
- The Impact of User-Generated Interfaces on the Participation of Users with a Disability in Virtual Environments: Blizzard Entertainment's World of Warcraft Model.
- Creator
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Merritt, Donald, McDaniel, Rudy, Zemliansky, Pavel, Mauer, Barry, Kim, Si Jung, University of Central Florida
- Abstract / Description
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When discussing games and the experience of gamers those with disabilities are often overlooked. This has left a gap in our understanding of the experience of players with disabilities in virtual game worlds. However there are examples of players with disabilities being very successful in the virtual world video game World of Warcraft, suggesting that there is an opportunity to study the game for usability insight in creating other virtual world environments. This study surveyed World of...
Show moreWhen discussing games and the experience of gamers those with disabilities are often overlooked. This has left a gap in our understanding of the experience of players with disabilities in virtual game worlds. However there are examples of players with disabilities being very successful in the virtual world video game World of Warcraft, suggesting that there is an opportunity to study the game for usability insight in creating other virtual world environments. This study surveyed World of Warcraft players with disabilities online for insight into how they used interface addons to manage their experience and identity performance in the game. A rubric was also created to study a selection of addons for evidence of the principles of Universal Design for Learning (UDL). The study found that World of Warcraft players with disabilities do not use addons more than able-bodied players, but some of the most popular addons do exhibit many or most of the principles of UDL. UDL principles appear to have emerged organically from addon iterations over time. The study concludes by suggesting that the same approach to user-generated content for the game interface taken by the creators of World of Warcraft, as well as high user investment in the environment, can lead to more accessible virtual world learning environments in the future.
Show less - Date Issued
- 2015
- Identifier
- CFE0005667, ucf:50175
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005667
- Title
- A curricula assessment and improvement quantitative model for higher education: a design for six sigma methodology.
- Creator
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Halawany, Abdullah, Elshennawy, Ahmad, Lee, Gene, Rabelo, Luis, Rahal, Ahmad, University of Central Florida
- Abstract / Description
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Curricula assessment is an integrated process to assist higher education institutions in addressing the challenges in adesignated field of study and in exploring the opportunities to better educate and prepare their students for an increasinglycomplex world.Although assessment as a topic has been researched extensively, there has been a lack of quantitative tools that addressthe requirements of many of the stakeholders that may be critical to the curriculum design and assessment processes...
Show moreCurricula assessment is an integrated process to assist higher education institutions in addressing the challenges in adesignated field of study and in exploring the opportunities to better educate and prepare their students for an increasinglycomplex world.Although assessment as a topic has been researched extensively, there has been a lack of quantitative tools that addressthe requirements of many of the stakeholders that may be critical to the curriculum design and assessment processes.This research proposes the utilization of Design for Six Sigma (DFSS) to develop a quantitative model for curriculumassessment and improvement for higher education institutions. A review of the literature indicates that there is a lack ofquantitative tools that enhance the reliability and efficiency of gathering customer requirements for curriculum in highereducation environment. In addition, there is a lack of tools to translate these requirements into actual characteristics that canbe used for curriculum design and assessment purposes. The literature also indicates that curriculum assessment is one ofseveral educational processes that affect the quality of education.This research proposes a quantitative model for curriculum assessment and improvement in higher education institutions,utilizing design for six sigma methodology. The proposed model explores the use of the Kano model concept to translateneeded requirements into desirable curriculum attributes and the general concept of establishing transfer function todetermine the level at which those requirements have been satisfied. The use of the developed model can help improvestudent learning and provide curriculum stakeholders with timely feedback about the curriculum and identify areas in need ofimprovement.To validate the capability of the proposed model, an ABET accredited department of Industrial Engineering in a USuniversity was used a case study.
Show less - Date Issued
- 2014
- Identifier
- CFE0005344, ucf:50497
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005344
