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Pages
- Title
- Interior: A Micro-Budget Horror Feature.
- Creator
-
Beckler, Zachary, Harris, Christopher, Sandler, Barry, Gay, Andrew, University of Central Florida
- Abstract / Description
-
INTERIOR is a feature-length film written, directed, and produced by Zachary Beckler as part of the requirements for earning a Master of Fine Arts in Entrepreneurial Digital Cinema from the University of Central Florida. The project aims to challenge existing conventions of the horror film on multiple levels (-) aesthetic, narrative, technical, and industrial (-) while also examining growing importance of workflow throughout all aspects of production. These challenges were both facilitated...
Show moreINTERIOR is a feature-length film written, directed, and produced by Zachary Beckler as part of the requirements for earning a Master of Fine Arts in Entrepreneurial Digital Cinema from the University of Central Florida. The project aims to challenge existing conventions of the horror film on multiple levels (-) aesthetic, narrative, technical, and industrial (-) while also examining growing importance of workflow throughout all aspects of production. These challenges were both facilitated and necessitated by the limited resources available to the production team and the academic context of the production. This thesis is a record of the film, from concept to completion and preparation for delivery to an audience.
Show less - Date Issued
- 2014
- Identifier
- CFE0005130, ucf:50677
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005130
- Title
- Zooming In On The Money Shot: An Exploratory Quantitative Analysis of Pornographic Film Actors.
- Creator
-
O'Neal, Erin, Huff-Corzine, Lin, Corzine, Harold, Pritchard, Adam, Potter, Roberto, University of Central Florida
- Abstract / Description
-
Sex work is one of the rare elements of our society that is both accepted and stigmatized. Ironically enough, it is stigmatized without being studied in depth. The truth is we know very little about sex work and even less about pornography(-)the most legal of genres. While researchers have spent a great deal of time determining the effects that pornography has on viewers, particularly juvenile viewers, little research has been done on the men and women who make pornography. A 43 question...
Show moreSex work is one of the rare elements of our society that is both accepted and stigmatized. Ironically enough, it is stigmatized without being studied in depth. The truth is we know very little about sex work and even less about pornography(-)the most legal of genres. While researchers have spent a great deal of time determining the effects that pornography has on viewers, particularly juvenile viewers, little research has been done on the men and women who make pornography. A 43 question survey was created and disseminated to those in the pornographic film industry, both amateur and professional, resulting in 210 respondents from all walks of life. The results of the inquiry show that social scientists know relatively little about working in pornography, having a profound impact on the current discussion and future research. Additionally, this investigation presents a new and creative method for surveying hard to reach, hidden, or sensitive subject populations that will aid in aspects of future research on sex work and other stigmatized behaviors.
Show less - Date Issued
- 2016
- Identifier
- CFE0006365, ucf:51532
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006365
- Title
- Hydrodynamic Measurements of the Flow Structure Emanating From A Multi-Row Film Cooling Configuration.
- Creator
-
Voet, Michael, Kapat, Jayanta, Vasu Sumathi, Subith, Ahmed, Kareem, University of Central Florida
- Abstract / Description
-
The demand for more power is rapidly increasing worldwide. Attention is turned to increasingthe efficiency of modern methods for power generation. Gas turbines provide 35% of the powerdemands within the United States. Efficiency of gas turbines is defined in an ideal sense by thethermal efficiency of the Brayton Cycle. The overall efficiency of a gas turbine can be increased while simultaneously maximizing specific work output, by increasing the turbine inlet temperature. However, even with...
Show moreThe demand for more power is rapidly increasing worldwide. Attention is turned to increasingthe efficiency of modern methods for power generation. Gas turbines provide 35% of the powerdemands within the United States. Efficiency of gas turbines is defined in an ideal sense by thethermal efficiency of the Brayton Cycle. The overall efficiency of a gas turbine can be increased while simultaneously maximizing specific work output, by increasing the turbine inlet temperature. However, even with the advancements in modern materials in terms of maximum operatingtemperature, various components are already subjected to temperatures higher than their melting temperatures. An increase in inlet temperature would subject various components to even higher temperatures, such that more effective cooling would be necessary, whilst ideally using the same (or less) amount of cooling air bled from compressor. Improvements in the performance of these cooling techniques is thus required. The focus of this thesis is on one such advanced cooling technique, namely film cooling.The objective of this study is to investigate the effects of coolant density on the jet structure for different multi-row film cooling configurations. As research is performed on improving the performance of film cooling, the available conditions during testing may not reflect actual engine-like conditions. Typical operating density ratio at engine conditions are between 1.5 and 2, while it is observed that a majority of the density ratios tested in literature are between 1 and 1.5. While thesetests may be executed outside of engine-like conditions, it is important to understand how density ratio effects the flow physics and film cooling performance. The density ratio within this study is varied between 1.0 and 1.5 by alternating the injecting fluid between air and Carbon Dioxide, respectively.Both a simple cylindrical and fan-shape multi-row film cooling configuration are tested in the present study. In order to compare the results collected from these geometries, lateral and spanwise hole-to-hole spacing, metering hole diameter, hole length, and inclination angle are held constant between all testing configurations. The effect of fluid density upon injection is examined by independently holding either blowing, momentum flux, or velocity ratio constant whilst varying density ratio. Comparisons between both of the film cooling configurations are also made as similar ratios are tested between geometries. This allows the variation in flow structure and performance to be observed from alternating the film cooling hole shape.Particle Image Velocimetry (PIV) is implemented to obtain both streamwise and wall normal velocitymeasurements for the array centerline plane. This data is used to examine the interactionof the jet as it leaves the film cooling hole and the structure produced when the jet mixes with theboundary layer.Similarities in jet to jet interactions and surface attachment between density ratios are seen for the cylindrical configuration when momentum flux ratio is held constant. When observing constant blowing ratio comparisons of the cylindrical configurations, the lower density ratio is seen to begin detaching from the wall at M = 0.72 with little evidence of coolant in the near wall region. However, the higher density cylindrical injection retains its surface attachment at M = 0.74 with noticeably more coolant near the wall, because of significantly lower momentum flux ratio and lower (")jetting(") effect. The fan-shape film cooling configuration demonstrates improved performance, in terms of surface attachment, over a larger range of all ratios than that of the cylindrical cases. Additionally, the fan-shape configuration is shown to constantly retain a thicker layer of low velocity fluid in the near wall region when injected with the higher density coolant, suggesting improved performance at the higher density ratio.When tracking the jet trajectory, it is shown that the injection of CO2 through the cylindricalconfiguration yields a higher centerline wall normal height per downstream location than that of the lower density fluid. Comparing the results of the centerline tracking produced by the third and fifth rows for both the injection of air and CO2, it is confirmed that the fifth row of injection interacts with the boundary layer at a great wall normal height than that of the third row. Additionally, when observing the change in downstream trajectory between the fifth and seventh row of injection, a significant decrease in wall normal height is seen for the coolant produced by the seventh row. It is believed that the lack of a ninth row of injection allows the coolant from the seventh row of injection to remain closer to the target surface. This is further supported by the observation of the derived pressure gradient field and the path streamlines take while interacting with the recirculatory region produced by the injection of coolant into the boundary layer.Further conclusions are drawn by investigating the interaction between momentum thickness andthe influence of blowing ratio. Relatively constant downstream momentum thickness is observedfor the injection of lower density fluid for the blowing ratio range of M= 0.4 to 0.8 for the cylindrical configuration. It is suggested that a correlation exists between momentum thickness and film cooling performance, however further studies are needed to validate this hypothesis.
Show less - Date Issued
- 2017
- Identifier
- CFE0006817, ucf:51791
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006817
- Title
- Light Trapping in Thin Film Crystalline Silicon Solar Cells.
- Creator
-
Boroumand Azad, Javaneh, Chanda, Debashis, Peale, Robert, Del Barco, Enrique, Flitsiyan, Elena, Schoenfeld, Winston, University of Central Florida
- Abstract / Description
-
This dissertation presents numerical and experimental studies of a unified light trapping approach that is extremely important for all practical solar cells. A 2D hexagonal Bravais lattice diffractive pattern is studied in conjunction with the verification of the reflection mechanisms of single and double layer anti-reflective coatings in the broad range of wavelength 400 nm - 1100 nm. By varying thickness and conformity, we obtained the optimal parameters which minimize the broadband...
Show moreThis dissertation presents numerical and experimental studies of a unified light trapping approach that is extremely important for all practical solar cells. A 2D hexagonal Bravais lattice diffractive pattern is studied in conjunction with the verification of the reflection mechanisms of single and double layer anti-reflective coatings in the broad range of wavelength 400 nm - 1100 nm. By varying thickness and conformity, we obtained the optimal parameters which minimize the broadband reflection from the nanostructured crystalline silicon surface over a wide range of angle 0(&)deg;-65(&)deg;. While the analytical design of broadband, angle independent anti-reflection coatings on nanostructured surfaces remains a scientific challenge, numerical optimization proves a viable alternative, paving the path towards practical implementation of the light trapping solar cells. A 3 (&)#181;m thick light trapping solar cell is modeled in order to predict and maximize combined electron-photon harvesting in ultrathin crystalline silicon solar cells. It is shown that the higher charge carrier generation and collection in this design compensates the absorption and recombination losses and ultimately results in an increase in energy conversion efficiency. Further, 20 (&)#181;m and 100 (&)#181;m thick functional solar cells with the light trapping scheme are studied. The efficiency improvement is observed numerically and experimentally due to photon absorption enhancement in the light trapping cells with respect to a bare cell of same thickness.
Show less - Date Issued
- 2017
- Identifier
- CFE0006936, ucf:51654
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006936
- Title
- The Tailor's Apprentice Cinematic Experience Through The Micro-Budget Paradigm.
- Creator
-
Lehman, Jeffrey, Stoeckl, Ula, Sandler, Barry, Schlow, Stephen, University of Central Florida
- Abstract / Description
-
The Tailor's Apprentice is a feature-length, micro-budget, narrative digital motion picture, written, produced and directed by Jeffrey Lehman in partial fulfillment of the requirements of earning a Master of Fine Arts in Film from the University of Central Florida. The film is a result of applying specific monetary, logistical and creative limitations to the production process in order to contribute in defining the micro-budget aesthetic, resulting in a final shared cinematic audience...
Show moreThe Tailor's Apprentice is a feature-length, micro-budget, narrative digital motion picture, written, produced and directed by Jeffrey Lehman in partial fulfillment of the requirements of earning a Master of Fine Arts in Film from the University of Central Florida. The film is a result of applying specific monetary, logistical and creative limitations to the production process in order to contribute in defining the micro-budget aesthetic, resulting in a final shared cinematic audience experience. This thesis is a record of all stages from conception to completion of the executed, feature length film with-in the micro-budget production paradigm.
Show less - Date Issued
- 2013
- Identifier
- CFE0004877, ucf:49660
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004877
- Title
- Non-Oxide Porous Ceramics from Polymer Precursor.
- Creator
-
Yang, Xueping, An, Linan, Fang, Jiyu, Zhai, Lei, Huo, Qun, Wu, Shintson, University of Central Florida
- Abstract / Description
-
Non-oxide porous ceramics exhibit many unique and superior properties, such as better high-temperature stability, improved chemical inertness/corrosive resistance, as well as wide band-gap semiconducting behavior, which lead to numerous potential applications in catalysis, high temperature electronic and photonic devices, and micro-electromechanical systems. Currently, most mesoporous non-oxide ceramics (e.g. SiC) are formed by two-step templating methods, which are hard to adjust the pore...
Show moreNon-oxide porous ceramics exhibit many unique and superior properties, such as better high-temperature stability, improved chemical inertness/corrosive resistance, as well as wide band-gap semiconducting behavior, which lead to numerous potential applications in catalysis, high temperature electronic and photonic devices, and micro-electromechanical systems. Currently, most mesoporous non-oxide ceramics (e.g. SiC) are formed by two-step templating methods, which are hard to adjust the pore sizes, and require a harmful etching step or a high temperature treatment to remove the templates.In this dissertation, we report a novel technique for synthesizing hierarchically mesoporous non-oxide SiC ceramic from a block copolymer precursor. The copolymer precursors with vairing block length were synthesized by reversible addition fragmentation chain transfer polymerization. The block copolymers self-assemble into nano-scaled micelles with a core-shell structure in toluene. With different operation processes, hollow SiC nanospheres and bulk mesoporous SiC ceramics were synthesized after the subsequent pyrolysis of precorsur micelles. The resultant SiC ceramics have potential applications in catalysis, solar cells, separation, and puri?cation processes.The polymer synthesis and pyrolysis process will investigated by NMR, FTIR, GPC, TEM, and TGA/DSC. The morphology and structure of synthesised SiC hollow spheres and mesoporous ceramics were analyzed by SEM, TGA/DSC and BET/BJH analysis.Besides forming core shell micelles in selective solvent Toluene, we found that PVSZ-b-PS could also exhibit this property in the air water interface. By inducing the Langmuir-Blodgett deposition, a precursor monolayer with homogeously distributed povinylsilazane particles deposited on silicon wafer synthesized by spreading the diblock copolymer PVSZ-b-PS in the air water interface. After the pyrolysis process, orderly arranging SiC nano particles formed from the polymer precursor monolayer doped on the surface of silicon wafer, which shows great potential as an optoelectronic material. The deposition process and the relationship between compress pressure and monolayer morphology were studies, and the structure of monolayer and SiC dots were investigated by AFM, SEM.
Show less - Date Issued
- 2014
- Identifier
- CFE0005564, ucf:50274
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005564
- Title
- MIA-mi: Exploring the Affect of Digital Cinema Through Micro-Budget Production Techniques.
- Creator
-
Lima, Yesenia, Mills, Lisa, Peterson, Lisa, Underberg-Goode, Natalie, University of Central Florida
- Abstract / Description
-
MIA-mi is a feature-length, micro-budget, and digital motion picture, produced, written, and directed by Yesenia Lima in pursuit of the Master of Fine Arts in Entrepreneurial Digital Cinema from the University of Central Florida. The film is a satirical and naturalistic look at the standing global image of a city, Miami, FL, and its inhabitants. The guiding question behind the production is whether a portrayal of a city, outside of its stereotypical portrait in mass media, could spark and...
Show moreMIA-mi is a feature-length, micro-budget, and digital motion picture, produced, written, and directed by Yesenia Lima in pursuit of the Master of Fine Arts in Entrepreneurial Digital Cinema from the University of Central Florida. The film is a satirical and naturalistic look at the standing global image of a city, Miami, FL, and its inhabitants. The guiding question behind the production is whether a portrayal of a city, outside of its stereotypical portrait in mass media, could spark and affect a dialogue on the global image of the city and its inhabitant's ability to adjust that image rather than conform to it. The film was produced in a micro-budget (under $50,000) model, following the program's guidelines. It was shot on location in Miami, FL, with a volunteer cast and crew. This thesis is a record of the film's development from inception to post-production, in preparation for distribution.
Show less - Date Issued
- 2015
- Identifier
- CFE0005649, ucf:50182
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005649
- Title
- Theodore is Dying: Production of the Feature Film from Development Through Distribution.
- Creator
-
Pomeranz, Ryan, Stoeckl, Ula, Peterson, Lisa, Schlow, Stephen, University of Central Florida
- Abstract / Description
-
Theodore Is Dying is a feature length film written and directed by Ryan Ceri Pomeranz. It was undertaken as a partial fulfillment of the requirements to receive a Master of Fine Arts in Film and Digital Media from the Department of Film in the College of Arts and Humanities at the University of Central Florida. The film aims to explore both the immediate and the long-term effects of choices made by four people at specific moments of demarcation in their lives. Structurally, the film is...
Show moreTheodore Is Dying is a feature length film written and directed by Ryan Ceri Pomeranz. It was undertaken as a partial fulfillment of the requirements to receive a Master of Fine Arts in Film and Digital Media from the Department of Film in the College of Arts and Humanities at the University of Central Florida. The film aims to explore both the immediate and the long-term effects of choices made by four people at specific moments of demarcation in their lives. Structurally, the film is presented in an episodic and non- linear style that attempts to examine each protagonist's own set of conflicts, while simultaneously exposing how the choices they make affect one another. The film's production presented many unique challenges to our producing team, cast and crew such as shooting on location in Scranton, Pennsylvania over one thousand miles from home and figuring out where to allocate funds from our (")ultra-low(") budget. These challenges were met head on and often times acted as catalysts for rethinking the way that films at our budget level could be produced. As a result, the account of the making of Theodore Is Dying, from development through distribution, aims to contribute these ideas to the larger conversation about the role of Ultra-Low Budget Filmmaking in the modern filmmaking era.
Show less - Date Issued
- 2013
- Identifier
- CFE0004737, ucf:49846
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004737
- Title
- Legends of the Fabricated Wild: An Experimental Representation of Natural Landscapes through the Utilization of Analog Film Techniques.
- Creator
-
Twardus, Nicholas, Danker, Elizabeth, Shults, Katherine, Mills, Lisa, Peterson, Lisa, Watson, Keri, Dierdorff, Brooks, University of Central Florida
- Abstract / Description
-
Legends of the Fabricated Wild is a feature-length body of work of landscape films. Voice-Destroy, Self-Portrait: Impermanence and the titular Legends of the Fabricated Wild are the experimental films that comprise my body of work. Keep your Distance, a single-channel installation, is a supplemental piece.Legends of the Fabricated Wild frames the complex interaction between a filmmaker and the collective unconsciousness of the natural environment, a theory outlined by Carl Jung, considering...
Show moreLegends of the Fabricated Wild is a feature-length body of work of landscape films. Voice-Destroy, Self-Portrait: Impermanence and the titular Legends of the Fabricated Wild are the experimental films that comprise my body of work. Keep your Distance, a single-channel installation, is a supplemental piece.Legends of the Fabricated Wild frames the complex interaction between a filmmaker and the collective unconsciousness of the natural environment, a theory outlined by Carl Jung, considering the implications and discoveries along the way. Subtle movement and precise compositions provide a transcendental perspective on the natural Florida landscape. Images of landscapes devoid of human figures are structured together in my work to meditate on the environment and the way humanity has shaped the landscape. Super 8mm and 16mm analog film frames expansive landscapes in a square image and challenges modern cinematic representations by applying the texture of celluloid. High definition digital video contrasts analog film. I foreground artificiality and the ways humanity has utilized the landscape through this medium.While searching for places to document (")pure(") or untouched landscapes, I discovered that modern landscapes are always influenced by the exchange between humanity and the natural environment. I wanted to foreground my own interaction with the natural Florida environment and challenge my interests and dominant ways of viewing landscapes. Through the assembly of a cinematic essay of landscape images with subtle motion, I foster an appreciation for the natural environment in an age of hyper-activity and exploitation of the landscape.
Show less - Date Issued
- 2019
- Identifier
- CFE0007546, ucf:52617
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007546
- Title
- PROBING AND TUNING THE SIZE, MORPHOLOGY, CHEMISTRY AND STRUCTURE OF NANOSCALE CERIUM OXIDE.
- Creator
-
Kuchibhatla, Satyanarayana, Seal, Sudipta, University of Central Florida
- Abstract / Description
-
Cerium oxide (ceria)-based materials in the nanoscale regime are of significant fundamental and technological interest. Nanoceria in pure and doped forms has current and potential use in solid oxide fuel cells, catalysis, UV- screening, chemical mechanical planarization, oxygen sensors, and bio-medical applications. The characteristic feature of Ce to switch between the +3 and + 4 oxidation states renders oxygen buffering capability to ceria. The ease of this transformation was expected to be...
Show moreCerium oxide (ceria)-based materials in the nanoscale regime are of significant fundamental and technological interest. Nanoceria in pure and doped forms has current and potential use in solid oxide fuel cells, catalysis, UV- screening, chemical mechanical planarization, oxygen sensors, and bio-medical applications. The characteristic feature of Ce to switch between the +3 and + 4 oxidation states renders oxygen buffering capability to ceria. The ease of this transformation was expected to be enhanced in the nanoceria. In most the practical scenarios, it is necessary to have a stable suspension of ceria nanoparticles (CNPs) over longer periods of time. However, the existing literature is confined to short term studies pertaining to synthesis and property evaluation. Having understood the need for a comprehensive understanding of the CNP suspensions, this dissertation is primarily aimed at understanding the behavior of CNPs in various chemical and physical environments. We have synthesized CNPs in the absence of any surfactants at room temperature and studied the aging characteristics. After gaining some understanding about the behavior of this functional oxide, the synthesis environment and aging temperature were varied, and their affects were carefully analyzed using various materials analysis techniques such as high resolution transmission electron microscopy (HRTEM), UV-Visible spectroscopy (UV-Vis), and X-ray photoelectron spectroscopy (XPS). When the CNPs were aged at room temperature in as-synthesized condition, they were observed to spontaneously assemble and evolve as fractal superoctahedral structures. The reasons for this unique polycrystalline morphology were attributed to the symmetry driven assembly of the individual truncated octahedral and octahedral seed of the ceria. HRTEM and Fast Fourier Transform (FFT) analyses were used to explain the agglomeration behavior and evolution of the octahedral morphology. Some of the observations were supported by molecular dynamic simulations. Poly (ethylene glycol) (PEG) and ethylene glycol (EG) were used to control the kinetics of this morphology evolution. The ability to control the agglomeration of CNPs in these media stems from the lower dielectric constant and an increased viscosity of the EG and PEG based solvents. CNPs when synthesized and aged in frozen conditions, i.e. in ice, were found to form one dimensional, high aspect ratio structures. A careful analysis has provided some evidence that the CNPs use the porous channels in ice as a template and undergo oriented attachment to form nanorods. When the aging treatment was done near freezing temperature in solution, the nanorods were not observed, confirming the role of channels in ice. When synthesized in aqueous media such as DI water, PEG and EG; CNPs were observed to exhibit a reversible oxidation state switching between +3 and +4. Band gap values were computed from the optical absorption data. The changes in the band gap values observed were attributed to the changes in the oxidation state of CNPs as opposed to the quantum confinement effects, as expected in other nanoparticle systems. The work presented in this dissertation demonstrates, with evidence, that in order to obtain a comprehensive understanding of the properties of nanoscale materials it is of paramount importance to monitor their behavior over relatively longer periods of time under various ambient environments. While the solution based techniques offer a versatility and low cost route to study the fundamental properties of nanomaterials, they suffer some inherent problems such as precursor contamination and uncontrolled chemical reactions. Especially when analyzing the behavior of ceria-based materials for applications like solid oxide fuel cells, a great control in the density and crystalline quality are desired. In order to achieve this, as a first step pure ceria thin films were synthesized using oxygen plasma assisted molecular beam epitaxy (OPA-MBE). The ceria films were analyzed using various in situ and ex situ techniques to study the crystal structure, growth mode and epitaxial quality of the films. It was observed that the epitaxial orientation of the ceria films could be tuned by varying the deposition rate. When the films were grown at low deposition rate (< 8 Å/min) ceria films with epitaxial (200) orientation were observed where as the films grown at high deposition rates (up to 30 Å/min) showed (111) orientation. Theoretical simulations were used to confirm some of the experimental facts observed in both nanoparticles and thin films.
Show less - Date Issued
- 2008
- Identifier
- CFE0002163, ucf:47499
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002163
- Title
- Adiabatic Film Cooling Effectiveness of a Transpiration-Cooled Leading Edge Fabricated by Laser Additive Manufacturing.
- Creator
-
Calderon, Luisana, Kapat, Jayanta, Raghavan, Seetha, Mingareev, Ilya, University of Central Florida
- Abstract / Description
-
Laser additive manufacturing (LAM) is an emerging technology capable of fabricating complex geometries not possibly made by investment casting methods for gas turbine applications. LAM techniques consist of building parts in a layer-by-layer process by selectively melting metal powders. In the present study, a mock leading edge segment of a turbine blade fabricated by LAM of Inconel 718 powders is investigated. For this particular design, the traditional showerhead film cooling holes have...
Show moreLaser additive manufacturing (LAM) is an emerging technology capable of fabricating complex geometries not possibly made by investment casting methods for gas turbine applications. LAM techniques consist of building parts in a layer-by-layer process by selectively melting metal powders. In the present study, a mock leading edge segment of a turbine blade fabricated by LAM of Inconel 718 powders is investigated. For this particular design, the traditional showerhead film cooling holes have been replaced by two strips containing engineered-porous regions with the purpose of simulating the effect of transpiration cooling. Transpiration cooling has been considered a promising external convective cooling method capable of providing a more uniform film and higher adiabatic film cooling effectiveness than conventional discrete film cooling. In addition, many studies have shown that this technique can yield high firing temperatures with much less coolant consumption than discrete film cooling. In this current study, adiabatic film cooling effectiveness is investigated by means of mass transfer using pressure sensitive paint (PSP). The experiments are conducted for blowing ratios ranging between M = 0.03 and M = 0.28 for a nominal density ratio of 1.5. The density ratio is obtained by using air as the mainstream flow and CO2 as the secondary flow (or coolant source). Results indicate higher coverage and film cooling effectiveness when increasing blowing ratio at the expense of higher pressure drop. In addition, the experimental results are compared to numerical analyses performed using steady state Reynolds Average Navier Stokes (RANS) simulations.
Show less - Date Issued
- 2018
- Identifier
- CFE0007315, ucf:52117
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007315
- Title
- A Linear Multiplexed Electrospray Thin Film Deposition System.
- Creator
-
Lojewski, Brandon, Deng, Weiwei, Chen, Ruey-Hung, Chen, Quanfang, University of Central Florida
- Abstract / Description
-
Liquid spray is essential to industries requiring processes such as spray coating, spray drying, spray pyrolysis, or spray cooling. This thesis reports the design, fabrication, and characterization of a thin film deposition system which utilizes a linear multiplexed electrospray (LINES) atomizer. First, a thorough review of the advantages and limitations of prior multiplexed electrospray systems leads to discussion of the design rationale for this work. Next, the line of charge model was...
Show moreLiquid spray is essential to industries requiring processes such as spray coating, spray drying, spray pyrolysis, or spray cooling. This thesis reports the design, fabrication, and characterization of a thin film deposition system which utilizes a linear multiplexed electrospray (LINES) atomizer. First, a thorough review of the advantages and limitations of prior multiplexed electrospray systems leads to discussion of the design rationale for this work. Next, the line of charge model was extended to prescribe the operating conditions for the experiments and to estimate the spray profile. The spray profile was then simulated using a Lagrangian model and solved using a desktop supercomputer based on Graphics Processing Units (GPUs). The simulation was extended to estimate the droplet number density flux during deposition. Pure ethanol was electrosprayed in the cone-jet mode from a 51-nozzle aluminum LINES atomizer with less than 3% relative standard deviation in the D10 average droplet diameter as characterized using Phase Doppler Interferometry (PDI). Finally a 25-nozzle LINES was integrated into a thin film deposition system with a heated, motion controlled stage, to deposit TiO2 thin films onto silicon wafers from an ethanol based nanoparticle suspension. The resulting deposition pattern was analyzed using SEM, optical profilometry, and macro photography and compared with the numerical simulation results. The LINES tool developed here is a step forward to enabling the power of electrospray for industrial manufacturing applications in clean energy, health care, and electronics.
Show less - Date Issued
- 2013
- Identifier
- CFE0005106, ucf:50745
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005106
- Title
- Nature Records Itself: Concepts of Truth and Representation in Nature Film and Nature Television Shows.
- Creator
-
Rosalle, Rashaad, Peters, Philip, Adams, JoAnne, Dierdorff, Brooks, University of Central Florida
- Abstract / Description
-
With the advent of nature photography and film came new ways to understand and interpret the natural world. Prior to the 1910s these formats involved a more scientific and objective approach to recording nature. This aesthetic was abandoned in favor for narrative recreations and Hollywood structure after the 1930s. It is my belief that the dominant use of anthropomorphization, manipulations of setting and animal life, and rugged explorer motifs, all have lead to a loss of a more contemplative...
Show moreWith the advent of nature photography and film came new ways to understand and interpret the natural world. Prior to the 1910s these formats involved a more scientific and objective approach to recording nature. This aesthetic was abandoned in favor for narrative recreations and Hollywood structure after the 1930s. It is my belief that the dominant use of anthropomorphization, manipulations of setting and animal life, and rugged explorer motifs, all have lead to a loss of a more contemplative and meditative appreciation of nature within the Nature television and film format. It is my goal to explore through a series of videos how one can more naturally represent a setting through the use of perspective and compositional framing, matching the natural rhythms of a setting through editing and motion, and being conscious of the viewers sense of placement in a space. I intend to visually demonstrate how a more organic, situated, and less Hollywood-style of interpreting nature can lead to a deeper and more meaningful appreciation of it.
Show less - Date Issued
- 2016
- Identifier
- CFE0006490, ucf:51393
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006490
- Title
- Investigation on electrical properties of RF sputtered deposited BCN thin films.
- Creator
-
Prakash, Adithya, Sundaram, Kalpathy, Yuan, Jiann-Shiun, Lin, Mingjie, University of Central Florida
- Abstract / Description
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The ever increasing advancements in semiconductor technology and continuous scaling of CMOS devices mandate the need for new dielectric materials with low-k values. The interconnect delay can be reduced not only by the resistance of the conductor but also by decreasing the capacitance of dielectric layer. Also cross-talk is a major issue faced by semiconductor industry due to high value of k of the inter-dielectric layer (IDL) in a multilevel wiring scheme in Si ultra large scale integrated...
Show moreThe ever increasing advancements in semiconductor technology and continuous scaling of CMOS devices mandate the need for new dielectric materials with low-k values. The interconnect delay can be reduced not only by the resistance of the conductor but also by decreasing the capacitance of dielectric layer. Also cross-talk is a major issue faced by semiconductor industry due to high value of k of the inter-dielectric layer (IDL) in a multilevel wiring scheme in Si ultra large scale integrated circuit (ULSI) devices. In order to reduce the time delay, it is necessary to introduce a wiring metal with low resistivity and a high quality insulating film with a low dielectric constant which leads to a reduction of the wiring capacitance.Boron carbon nitride (BCN) films are prepared by reactive magnetron sputtering from a B(&)#172;4C target and deposited to make metal-insulator-metal (MIM) sandwich structures using aluminum as the top and bottom electrodes. BCN films are deposited at various N2/Ar gas flow ratios, substrate temperatures and process pressures. The electrical characterization of the MIM devices includes capacitance vs. voltage (C-V), current vs voltage, and breakdown voltage characteristics. The above characterizations are performed as a function of deposition parameters.
Show less - Date Issued
- 2013
- Identifier
- CFE0004912, ucf:49625
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004912
- Title
- Theoretical Studies of Nanostructure Formation and Transport on Surfaces.
- Creator
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Aminpour, Maral, Rahman, Talat, Stolbov, Sergey, Roldan Cuenya, Beatriz, Blair, Richard, University of Central Florida
- Abstract / Description
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This dissertation undertakes theoretical and computational research to characterize and understand in detail atomic configurations and electronic structural properties of surfaces and interfaces at the nano-scale, with particular emphasis on identifying the factors that control atomic-scale diffusion and transport properties. The overarching goal is to outline, with examples, a predictive modeling procedure of stable structures of novel materials that, on the one hand, facilitates a better...
Show moreThis dissertation undertakes theoretical and computational research to characterize and understand in detail atomic configurations and electronic structural properties of surfaces and interfaces at the nano-scale, with particular emphasis on identifying the factors that control atomic-scale diffusion and transport properties. The overarching goal is to outline, with examples, a predictive modeling procedure of stable structures of novel materials that, on the one hand, facilitates a better understanding of experimental results, and on the other hand, provide guidelines for future experimental work. The results of this dissertation are useful in future miniaturization of electronic devices, predicting and engineering functional novel nanostructures. A variety of theoretical and computational tools with different degrees of accuracy is used to study problems in different time and length scales. Interactions between the atoms are derived using both ab-initio methods based on Density Functional Theory (DFT), as well as semi-empirical approaches such as those embodied in the Embedded Atom Method (EAM), depending on the scale of the problem at hand. The energetics for a variety of surface phenomena (adsorption, desorption, diffusion, and reactions) are calculated using either DFT or EAM, as feasible. For simulating dynamic processes such as diffusion of ad-atoms on surfaces with dislocations the Molecular Dynamics (MD) method is applied. To calculate vibrational mode frequencies, the infinitesimal displacement method is employed. The combination of non-equilibrium Green's function (NEGF) and DFT is used to calculate electronic transport properties of molecular devices as well as interfaces and junctions.
Show less - Date Issued
- 2013
- Identifier
- CFE0005298, ucf:50504
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005298
- Title
- Pembroke Circle: A Portrayal Of Social Themes Using Micro-budget Cinema.
- Creator
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Rousseau, Max, Stoeckl, Ula, Sandler, Barry, Peterson, Lisa, Gay, Andrew, University of Central Florida
- Abstract / Description
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Pembroke Circle is a feature-length, micro-budget, digital motion picture, written, produced and directed by Max Rousseau as a part of the University of Central Florida's Masters in Fine Arts program in Digital Entrepreneurial Cinema. The filmmaker engaged some very difficult material in the micro-budget paradigm and grew personally and professionally in the process. This thesis documents the writing process, pre-production, fund-raising, production and post-production; all leading to the...
Show morePembroke Circle is a feature-length, micro-budget, digital motion picture, written, produced and directed by Max Rousseau as a part of the University of Central Florida's Masters in Fine Arts program in Digital Entrepreneurial Cinema. The filmmaker engaged some very difficult material in the micro-budget paradigm and grew personally and professionally in the process. This thesis documents the writing process, pre-production, fund-raising, production and post-production; all leading to the completion of a festival-ready feature film. It is the hope that this thesis will create an understanding of what it takes to make a micro-budget film and offer some help to future filmmakers embarking on a similar path.
Show less - Date Issued
- 2013
- Identifier
- CFE0005243, ucf:50605
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005243
- Title
- "City of Superb Democracy:" The Emergence of Brooklyn's Cultural Identity During Cinema's Silent Era, 1893-1928.
- Creator
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Morton, David, Foster, Amy, French, Scot, Zhang, Hong, University of Central Florida
- Abstract / Description
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This study discusses how motion picture spectatorship practices in Brooklyn developed separately from that of any other urban center in the United States between 1893 and 1928. Often overshadowed by Manhattan's glamorous cultural districts, Brooklyn's cultural arbiters adopted the motion picture as a means of asserting a sense of independence from the other New York boroughs. This argument is reinforced by focusing on the motion picture's ascendancy as one of the first forms of mass...
Show moreThis study discusses how motion picture spectatorship practices in Brooklyn developed separately from that of any other urban center in the United States between 1893 and 1928. Often overshadowed by Manhattan's glamorous cultural districts, Brooklyn's cultural arbiters adopted the motion picture as a means of asserting a sense of independence from the other New York boroughs. This argument is reinforced by focusing on the motion picture's ascendancy as one of the first forms of mass entertainment to be disseminated throughout New York City in congruence with the Borough of Brooklyn's rapid urbanization. In many significant areas Brooklyn's relationship with the motion picture was largely unique from anywhere else in New York. These differences are best illuminated through several key examples ranging from the manner in which Brooklyn's political and religious authorities enforced film censorship to discussing how the motion picture was exhibited and the way theaters proliferated throughout the borough Lastly this work will address the ways in which members of the Brooklyn community influenced the production practices of the films made at several Brooklyn-based film studios. Ultimately this work sets out to explain how an independent community was able to determine its own form of cultural expression through its relationship with mass entertainment.
Show less - Date Issued
- 2014
- Identifier
- CFE0005217, ucf:50636
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005217
- Title
- SPECTRAL SIGNATURE MODIFICATION BY APPLICATION OF INFRARED FREQUENCY-SELECTIVE SURFACES.
- Creator
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Monacelli, Brian, Boreman, Glenn, University of Central Florida
- Abstract / Description
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It is desirable to modify the spectral signature of a surface, particularly in the infrared (IR) region of the electromagnetic spectrum. To alter the surface signature in the IR, two methods are investigated: thin film application and antenna array application. The former approach is a common and straightforward incorporation of optically-thin film coatings on the surface designated for signature modification. The latter technique requires the complex design of a periodic array of passive...
Show moreIt is desirable to modify the spectral signature of a surface, particularly in the infrared (IR) region of the electromagnetic spectrum. To alter the surface signature in the IR, two methods are investigated: thin film application and antenna array application. The former approach is a common and straightforward incorporation of optically-thin film coatings on the surface designated for signature modification. The latter technique requires the complex design of a periodic array of passive microantenna elements to cover the surface in order to modify its signature. This technology is known as frequency selective surface (FSS) technology and is established in the millimeter-wave spectral regime, but is a challenging technology to scale for IR application. Incorporation of thin films and FSS antenna elements on a surface permits the signature of a surface to be changed in a deterministic manner. In the seminal application of this work, both technologies are integrated to comprise a circuit-analog absorbing IR FSS. The design and modeling of surface treatments are accomplished using commercially-available electromagnetic simulation software. Fabrication of microstructured antenna arrays is accomplished via microlithographic technology, particularly using an industrial direct-write electron-beam lithography system. Comprehensive measurement methods are utilized to study the patterned surfaces, including infrared spectral radiometry and Fourier-transform infrared spectrometry. These systems allow for direct and complementary spectral signature measurements--the radiometer measures the absorption or emission of the surface, and the spectrometer measures its transmission and reflection. For the circuit-analog absorbing square-loop IR FSS, the spectral modulation in emission is measured to be greater than 85% at resonance. Other desirable modifications of surface signature are also explored; these include the ability to filter radiation based on its polarization orientation and the ability to dynamically tune the surface signature. An array of spiral FSS elements allows for circular polarization conditioning. Three techniques for tuning the IR FSS signature via voltage application are explored, including the incorporation of a pn junction substrate, a piezoelectric substrate and a liquid crystal superstrate. These studies will ignite future explorations of IR FSS technology, enabling various unique applications.
Show less - Date Issued
- 2005
- Identifier
- CFE0000589, ucf:46471
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000589
- Title
- Optical Properties of Single Nanoparticles and Two-dimensional Arrays of Plasmonic Nanostructures.
- Creator
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Zhou, Yadong, Zou, Shengli, Harper, James, Zhai, Lei, Chen, Gang, Zheng, Qipeng, University of Central Florida
- Abstract / Description
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The tunability of plasmonic properties of nanomaterials makes them promising in many applications such as molecular detection, spectroscopy techniques, solar energy materials, etc. In the thesis, we mainly focus on the interaction between light with single nanoparticles and two-dimensional plasmonic nanostructures using electrodynamic methods. The fundamental equations of electromagnetic theory: Maxwell's equations are revisited to solve the problems of light-matter interaction, particularly...
Show moreThe tunability of plasmonic properties of nanomaterials makes them promising in many applications such as molecular detection, spectroscopy techniques, solar energy materials, etc. In the thesis, we mainly focus on the interaction between light with single nanoparticles and two-dimensional plasmonic nanostructures using electrodynamic methods. The fundamental equations of electromagnetic theory: Maxwell's equations are revisited to solve the problems of light-matter interaction, particularly the interaction of light and noble nanomaterials, such as gold and silver. In Chapter 1, Stokes parameters that describe the polarization states of electromagnetic wave are presented. The scattering and absorption of a particle with an arbitrary shape are discussed. In Chapter 2, several computational methods for solving the optical response of nanomaterials when they are illuminated by incident light are studied, which include the Discrete Dipole Approximation (DDA) method, the coupled dipole (CD) method, etc. In Chapter 3, the failure and reexamination of the relation between the Raman enhancement factor and local enhanced electric field intensity is investigated by placing a molecular dipole in the vicinity of a silver rod. Using a silver rod and a molecular dipole, we demonstrate that the relation generated using a spherical nanoparticle cannot simply be applied to systems with particles of different shapes. In Chapter 4, a silver film with switchable total transmission/reflection is discussed. The film is composed of two-dimensional rectangular prisms. The factors affecting the transmission (reflection) as well as the mechanisms leading to the phenomena are studied. Later, in Chapter 5 and 6, the sandwiched nano-film composed of two 2D rectangular prisms arrays and two glass substrates with a continuous film in between is examined to enhance the transmission of the continuous silver film.
Show less - Date Issued
- 2018
- Identifier
- CFE0007117, ucf:51943
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007117
- Title
- Momentum, Moment, Epiphany: The Psychological Intersection of Motion Picture, the Still Frame, and Three-Dimensional Form.
- Creator
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Gerstein, Mark, Poindexter, Carla, Buyssens, Ryan, Adams, JoAnne, University of Central Florida
- Abstract / Description
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My journey from Hollywood Film production to a Fine Arts practice has been shaped by theory from Philosophy of Mind, Cognitive Psychology, Film, and Art, leading me to a new visual vocabulary at the intersection of motion picture, the still image, and three-dimensional form.I create large mixed media collages by projecting video onto photographs and sculptural forms, breaking the boundaries of the conventional film frame and exceeding the dynamic range of typical visual experience. My work...
Show moreMy journey from Hollywood Film production to a Fine Arts practice has been shaped by theory from Philosophy of Mind, Cognitive Psychology, Film, and Art, leading me to a new visual vocabulary at the intersection of motion picture, the still image, and three-dimensional form.I create large mixed media collages by projecting video onto photographs and sculptural forms, breaking the boundaries of the conventional film frame and exceeding the dynamic range of typical visual experience. My work explores emotional connections and fissures within family, and hidden meanings of haunting memories and familiar places.I am searching for an elusive type of perceptual experience characterized by an instantaneous shift in perspective(-)an (")aha(") moment of epiphany when suddenly I have the overpowering feeling that I am both seeing and aware that I am seeing.
Show less - Date Issued
- 2018
- Identifier
- CFE0007003, ucf:52035
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007003
