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- Title
- Variance in Fade-Time of a Gamma-Gamma Distributed Irradiance Signal.
- Creator
-
Leclerc, Troy, Phillips, Ronald, Weeks, Arthur, Richardson, Martin, Marinescu, Dan, Andrews, Larry, University of Central Florida
- Abstract / Description
-
Free-space optical communications are predominantly hindered by optical turbulence, an effect caused by temperature and pressure variations within the atmosphere. The result is an optical wave interfering with itself due to multipath propagation via tiny refractive-index fluctuations across the wave-front. Optical communication systems are affected when the channel conditions induce fading in the irradiance signal that is received at the detector. The nature of optical interference imparted...
Show moreFree-space optical communications are predominantly hindered by optical turbulence, an effect caused by temperature and pressure variations within the atmosphere. The result is an optical wave interfering with itself due to multipath propagation via tiny refractive-index fluctuations across the wave-front. Optical communication systems are affected when the channel conditions induce fading in the irradiance signal that is received at the detector. The nature of optical interference imparted by the atmosphere is a random process and therefore the received irradiance signal is often characterized by an appropriate probability density function (PDF). Data collected during past free-space optical experiments in the atmosphere support the gamma-gamma distribution as a practical PDF model for received irradiance fluctuations, although the irradiance fluctuations do occasionally tend towards a lognormal distribution.Utilization of the gamma-gamma irradiance PDF allows for calculation of statistical moments of the irradiance threshold level-crossing distribution. Presented analysis focuses on the results of the gamma-gamma irradiance PDF. Previously, expressions were developed for the expected number of gamma-gamma distributed irradiance threshold level-crossings. Expressions for the mean square number of gamma-gamma distributed irradiance threshold level-crossings are derived and presented. The derived expressions lead to the mean and variance of signal fade time. Outcomes of the derived expressions are presented in relation to free-space optical communication system performance.Comparisons are made between the theoretical analysis and experimental data taken at the Innovative Science and Technology Facility (ISTEF) located at the Kennedy Space Center in Cape Canaveral, Florida. The strength of the atmospheric turbulence is often characterized by three measurable parameters: the refractive index structure constant Cn2, the inner scale l0, and the outer scale L0. The optical path (L~1km) was instrumented such that direct comparisons could be drawn between the measured atmospheric turbulence parameters and the parameters of the gamma-gamma irradiance model. Variance of fade time data were found to agree well for smaller apertures where effects of aperture averaging are not present and in cases where scintillation is weak to moderate. It is suggested that a more appropriate PDF, with a heavier focus on aperture averaging, may be applied in future studies of these fade statistics.
Show less - Date Issued
- 2012
- Identifier
- CFE0004397, ucf:53153
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004397
- Title
- IN-FRAME MUTAGENESIS OF GENES ENCODING A SELENIUM-DEPENDENT MOLYBDENUM HYDROXYLASE AND PUTATIVE ACCESSORY PROTEINS IN ENTEROCOCCUS FAECALIS.
- Creator
-
Mallard, Christopher, Self, William, University of Central Florida
- Abstract / Description
-
Enterococcus faecalis is a well known nosocomial drug resistant pathogen that is responsible for urinary tract infections, bacteremia, wound infections and endocarditis through the formation of biofilms. It has been shown that 68 genes present within the core genome of E. faecalis are upregulated in biofilm formation. One of those 68 genes is a putative selenium-dependent molybdenum hydroxylase (SDMH). Adjacent to this gene are a series of open reading frames that have been postulated to play...
Show moreEnterococcus faecalis is a well known nosocomial drug resistant pathogen that is responsible for urinary tract infections, bacteremia, wound infections and endocarditis through the formation of biofilms. It has been shown that 68 genes present within the core genome of E. faecalis are upregulated in biofilm formation. One of those 68 genes is a putative selenium-dependent molybdenum hydroxylase (SDMH). Adjacent to this gene are a series of open reading frames that have been postulated to play a role in the maturation of a labile selenium cofactor. The biosynthesis of this labile cofactor has yet to be studied at either the genetic or biochemical level. The addition of selenium to growth medium caused a significant increase in biofilm density and extracellular hydrogen peroxide by wild type E. faecalis. By site-directed mutagenesis gene products encoded in the SDMH operon were shown to be necessary for the selenium-dependent biofilm formation as well as extracellular hydrogen peroxide production. This biofilm and peroxide phenotype is inhibited both by tungsten or auranofin in wild type E. faecalis suggesting the SDMH is a necessary enzyme for selenium-dependent biofilm and peroxide formation. These results show that the gene products encoded within the SDMH operon are necessary for a selenium-dependent biofilm formation as well as extracellular hydrogen peroxide production. These mutants will provide the basis for defining the synthesis of the labile selenium cofactor and allow for an expanded understanding of the biological use of selenium.
Show less - Date Issued
- 2010
- Identifier
- CFE0003420, ucf:53152
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003420
- Title
- BAKER:THE MAKING OF AN INDEPENDENT THRILLER.
- Creator
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Lopez, Laura, Finch, Randy, University of Central Florida
- Abstract / Description
-
Baker is an independently financed low budget film that examines the ambiguous nature of compassion in the day-to-day life of hospice care personnel. The creation of the film entailed three stages: pre-production, production and post-production in which numerous artistic, financial and logistic challenges arose and threatened the completion of the picture. The complex nature of the subject matter required particular attention to the structure of the script. The budgetary restrictions enforced...
Show moreBaker is an independently financed low budget film that examines the ambiguous nature of compassion in the day-to-day life of hospice care personnel. The creation of the film entailed three stages: pre-production, production and post-production in which numerous artistic, financial and logistic challenges arose and threatened the completion of the picture. The complex nature of the subject matter required particular attention to the structure of the script. The budgetary restrictions enforced a minimalist approach to locations as well as other creative considerations such as the size of the cast and period setting. The shooting location dictated the framework of the aesthetic approach in design as well as in mise-en-scene for the film. The post-production phase redefined the film once the structure became dependant on the relationship between footage and aural elements rather than on the blueprint of the script. This artistic journey imposed a need for creative problem solving and adaptability. The process of working on Baker allowed me to have a full understanding of my role in the collaboration with talent, the management of crew and my creative duty to maintain the essence of the script while realizing my artistic vision. The overall experience has deepened my commitment to storytelling in the collaborative art of cinema. The result is a highly personal expression of my voice as a director, a female, and social critic
Show less - Date Issued
- 2008
- Identifier
- CFE0002327, ucf:53151
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002327
- Title
- THE SOUND OF POLITICS: AN EXAMINATION OF POLITICAL ORIENTATIONS AND MUSICAL PREFERENCES AMONG COLLEGE AGED ADULTS.
- Creator
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Stringer, Omari, Wright, Chrysalis, University of Central Florida
- Abstract / Description
-
Music fits in a larger media culture that can influence the thoughts and beliefs of many people. Specifically, there is an interest in the relationship between music and any influences it may have on political views or orientations. Based on the existing literature, it is hypothesized that there will be a significant correlation between political orientations and involvement in music and political orientations with music genre preferences. It is also hypothesized that there will be a...
Show moreMusic fits in a larger media culture that can influence the thoughts and beliefs of many people. Specifically, there is an interest in the relationship between music and any influences it may have on political views or orientations. Based on the existing literature, it is hypothesized that there will be a significant correlation between political orientations and involvement in music and political orientations with music genre preferences. It is also hypothesized that there will be a relationship between socioeconomic status and music preferences. Furthermore, it is expected that participants will report a high level of music involvement, considering how accessible music is to many students (Agbo-Quaye & Robertson, 2010; RIAA, 2016). Results indicate that there is a correlation between political orientation and several genres, in addition to demographic variables. Participants reported a high level of music involvement and high usage of music streaming services. Additional analysis indicates that two of the top five genres participants listened to (alternative and religious music) can be a significant predictor of political orientation.
Show less - Date Issued
- 2017
- Identifier
- CFH2000159, ucf:53149
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000159
- Title
- THE EARLY MODERN SPACE: (CARTOGRAPHIC) LITERATURE AND THE AUTHOR IN PLACE.
- Creator
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Myers, Michael, Gleyzon, Francois-Xavier, University of Central Florida
- Abstract / Description
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In geography, maps are a tool of placement which locate both the cartographer and the territory made cartographic. In order to place objects in space, the cartographer inserts his own judgment into the scheme of his design. During the Early Modern period, maps were no longer suspicious icons as they were in the Middle Ages and not yet products of science, but subjects of discourse and works of art. The image of a cartographer's territory depended on his vision�both the nature and placement of...
Show moreIn geography, maps are a tool of placement which locate both the cartographer and the territory made cartographic. In order to place objects in space, the cartographer inserts his own judgment into the scheme of his design. During the Early Modern period, maps were no longer suspicious icons as they were in the Middle Ages and not yet products of science, but subjects of discourse and works of art. The image of a cartographer's territory depended on his vision�both the nature and placement of his gaze�and the product reflected that author's judgment. This is not a study of maps as such but of Early Modern literature, cartographic by nature�the observations of the author were the motif of its design. However, rather than concretize observational judgment through art, the Early Modern literature discussed asserts a reverse relation�the generation of the material which may be observed, the reality, by the views of authors. Spatiality is now an emerging philosophical field of study, taking root in the philosophy of Deleuze & Guattari. Using the notion prevalent in both Postmodern and Early Modern spatiality, which makes of perception a collective delusion with its roots in the critique of Kant, this thesis draws a through-line across time, as texts such as Robert Burton's An Anatomy of Melancholy, Thomas More's Utopia, and selections from William Shakespeare display a tendency to remove value from the standard of representation, to replace meaning with cognition and prioritize a view of views over an observable world. Only John Milton approaches perception as possibly referential to objective reality, by re-inserting his ability to observe and exist in that reality, in a corpus which becomes less generative simulations of material than concrete signposts to his judgment in the world.
Show less - Date Issued
- 2015
- Identifier
- CFH0004899, ucf:53148
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004899
- Title
- THE EFFECTS OF USING AN INTERACTIVE STUDENT NOTEBOOK ON THE UNDERSTANDING OF THE CONCEPTS AND ALGORITHMS OF ADDITION AND SUBTRACTION OF FRACTIONS AND MIXED NUMBERS FOR FIFTH GRADE MATHEMATICS STUDENTS.
- Creator
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Twar, Brian, Ortiz, Enrique, University of Central Florida
- Abstract / Description
-
The purpose of this action research study was to observe the effectiveness of the utilization of an instructional tool in my three mathematics classes. Using a tool, called an Interactive Student Notebook, or ISN, the goal was to equip my students with a tool that would allow them to take and keep daily notes as well as conduct guided and independent practice in an organized fashion. I believed that my students would therefore utilize their notes and class work as a reference and study tool...
Show moreThe purpose of this action research study was to observe the effectiveness of the utilization of an instructional tool in my three mathematics classes. Using a tool, called an Interactive Student Notebook, or ISN, the goal was to equip my students with a tool that would allow them to take and keep daily notes as well as conduct guided and independent practice in an organized fashion. I believed that my students would therefore utilize their notes and class work as a reference and study tool to assist them with their homework as well as studying for assessments. Weak to moderate correlations between the students' ISN assessments and end-of-topic assessments scores was found. In-class observations of student utilization of their ISNs and out-of-class observations of students' collected ISNs were also conducted to assess how well students were able to keep their ISNs neat and organized. It was observed that most of the students were able to keep their ISNs complete and organized. Students also shared, by completing surveys, mostly positive feedback of the ISN process. They shared how often they used their ISNs at home as a reference and study tool and how useful they believed their ISNs were. Therefore, I concluded that even though there was not a strong correlation between high ISN assessment scores and high topic assessment scores, the ISN was still a useful tool that assisted my students to keep organized notes and class work, and proved to be a useful reference and study tool.
Show less - Date Issued
- 2011
- Identifier
- CFE0004093, ucf:53147
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004093
- Title
- AN INVESTIGATION OF ALTRUISM AND PERSONALITY VARIABLES AMONGBEGINNING COUNSELING STUDENTS.
- Creator
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Schmuldt, Laura, Robinson, E.H., University of Central Florida
- Abstract / Description
-
Altruism is loosely defined as a desire to help others as well as acts and behaviors towards that end, particularly when no expectation of personal gain or reward exists (Batson, Fultz, Schoenrade & Paduano, 1987). It seems likely that individuals who choose to pursue acareer in counseling might be doing so out of some altruistic interest; in other words a desire to come to the aid of others in distress. It has been noted as well that some individuals may enter the counseling profession based...
Show moreAltruism is loosely defined as a desire to help others as well as acts and behaviors towards that end, particularly when no expectation of personal gain or reward exists (Batson, Fultz, Schoenrade & Paduano, 1987). It seems likely that individuals who choose to pursue acareer in counseling might be doing so out of some altruistic interest; in other words a desire to come to the aid of others in distress. It has been noted as well that some individuals may enter the counseling profession based more on self-interest; for example, as "wounded healers" hoping to work on personal issues (Wheeler, 2002). Some researchers (Shapiro &Gabbard, 1996) hypothesize that overstated altruism may lead to burn-out and fatigue among some counselors whereas those who have limited altruism may have difficulties empathizing with clients. Despite the apparent relevance of altruism to counseling as a profession, very few studies have investigated the level of altruism among those in the field. The primary purpose of this study was to examine the relationship between altruism and personality variables in beginning counseling students. It is currently unclear to what extent altruism is a state (situational) vs. a trait (inherent). Grasping a greater sense of what constitutes altruistic behavior among beginning counseling students may benefit researchers in understanding the potential difficulties Shapiro & Gabbard (1996) suggest; i.e., burn-out, limited empathy or even self-gratification. The population in this study was 87 students entering a Master's degree in Counselor Education at a large, public institution in the Southeastern Unites States. The subjects completed the following assessments at orientation to their program: The Robinson-Heintzelman Inventory (an instrument designed to study altruism vs. self-interest in counselor education students), the Myers-Briggs Type Indicator (MBTI) and the Fundamental Interpersonal Relations Orientation-Behavior (FIRO-B). It was hypothesized that higher scores on altruism would correlate with the intuitive and feeling dimensions of the MBTI and low scores on wanted inclusion, wanted affection and expressed control on the FIRO-B. The hypotheses were not supported in this study; the only finding of statistical significance was the correlation between the thinking dimension of the MBTI and the total score on the RHI. Suggestions for future research are discussed.
Show less - Date Issued
- 2006
- Identifier
- CFE0001327, ucf:53145
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001327
- Title
- A Comparative Study of Computer-Assisted Instruction Versus Classroom Training of Naval Technicians of Varying Aptitude.
- Creator
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Dwyer, Daniel J., Burrough, Wayne A., Social Sciences
- Abstract / Description
-
University of Central Florida College of Social Sciences Thesis; Any discussion of computer-assisted instruction (CAI) cannot proceed very far without first examining the issue of programmed instruction (PI). CAI is a relatively recent development in the area of education and training, whereas PI enjoys a somewhat longer history. Nonetheless, PI lies at the very heart of CAI and forms the base on which CAI exists. CAI then, may be viewed as a mode or type of PI. B. F. Skinner's work in the...
Show moreUniversity of Central Florida College of Social Sciences Thesis; Any discussion of computer-assisted instruction (CAI) cannot proceed very far without first examining the issue of programmed instruction (PI). CAI is a relatively recent development in the area of education and training, whereas PI enjoys a somewhat longer history. Nonetheless, PI lies at the very heart of CAI and forms the base on which CAI exists. CAI then, may be viewed as a mode or type of PI. B. F. Skinner's work in the 1940's with the principles of operant conditioning laid the groundwork for the concept of PI (Garner, 1966). Operant conditioning is a type of conditioning whereby an emitted response is reinforced. The reinforcement should increase the strength of the response and presumably increase the chances that the response will occur again (Munn, Fernald, & Fernald, 1972). Operant conditioning, in which an individual is conditioned to behave in the direction of a predetermined goal, is achieved through the contingent reinforcement of a series of steps. These steps of action are linked together in a chain of successive approximations. 1 Each link of the chain approximates the end goal slightly more than the previous link. This chain of successive approximations is followed until the end behavior is achieved (Garner, 1966). 2 In this respect, PI makes use of the sequencing of small successive steps and contingent reinforcement to achieve some desired end goal , namely, achieving the lesson objective. This "Skinnerian" or linear form of PI requires the student to proceed through a forward moving chain in a step-by-step fashion until the end behavior is achieved. The step-by-step sequence, as it pertains to PI, refers to the individual segments or frames of a PI lesson. Each frame might be considered one step of the entire PI lesson. These frames, which should flow logically from one to the next, should build upon each other and approximate the lesson objective. Periodically, progress should be monitored in order to assure that the student is comprehending the lesson material (Wilson and Tosti, 1972). Typically, this is accomplished by incorporating multiple choice or true/false questions within the PI lesson itself . By so doing, student performances can be checked and appropriate actions taken within the concept of reinforcement. Deterline (1962) argues that all learned behavior is based on, reinforcement. Individuals learn by acting on their environment and, in turn, are influenced by the consequences of their actions (Deterline, 1962) . ""Then consequences strengthen behavior, reinforcement is said to have taken place.
Show less - Date Issued
- 1979
- Identifier
- CFR0003505, ucf:53141
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0003505
- Title
- A microcomputer implementation of real time, continuously programmable digital filters.
- Creator
-
Storma, William Edward, Simmons, Fred O., Engineering
- Abstract / Description
-
University of Central Florida College of Engineering Thesis; When a filter transfer function in s is replaced with the bilinear transform in z, t he resulting discrete model represents the original continuous model within a second order accuracy of integration. A unique set of recently discovered minimum memory algorithms that perform the bilinear transform on a continuous transfer function are implemented on an INTEL 8080 microprocessor system. Scal1ng techniques are used to frequency scale...
Show moreUniversity of Central Florida College of Engineering Thesis; When a filter transfer function in s is replaced with the bilinear transform in z, t he resulting discrete model represents the original continuous model within a second order accuracy of integration. A unique set of recently discovered minimum memory algorithms that perform the bilinear transform on a continuous transfer function are implemented on an INTEL 8080 microprocessor system. Scal1ng techniques are used to frequency scale all transfer functions to a standardized frequency. All data words are represented in a signed binary double precision format to maintain higher calculation speed and accuracy. Three test case transfer functions of different order are implemented using the bilinear transform algorithms. First, the algorithms are used to generate the three discrete models. Second, the continuous time models are driven by a step input function, generating a continuous time output. Third, the step function input is discretized and used to drive the bilinear algorithm derived models. Finally, the discrete outputs are compared with the continuous time outputs to validate and evaluate the software techniques used to implement the bilinear algorithms, which imply that the techniques provide a basis for new hardware designs.
Show less - Date Issued
- 1979
- Identifier
- CFR0003497, ucf:53140
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0003497
- Title
- Shape reconstruction from shading using linear approximation.
- Creator
-
Tsai, Ping Sing, Shah, Mubarak, Arts and Sciences
- Abstract / Description
-
University of Central Florida College of Arts and Sciences Thesis; Shape from shading (SFS) deals with the recovery of 3D shape from a single monocular image. This problem was formally introduced by Horn in the early 1970s. Since then it has received considerable attention, and several efforts have been made to improve the shape recovery. In this thesis, we present a fast SFS algorithm, which is a purely local method and is highly parallelizable. In our approach, we first use the discrete...
Show moreUniversity of Central Florida College of Arts and Sciences Thesis; Shape from shading (SFS) deals with the recovery of 3D shape from a single monocular image. This problem was formally introduced by Horn in the early 1970s. Since then it has received considerable attention, and several efforts have been made to improve the shape recovery. In this thesis, we present a fast SFS algorithm, which is a purely local method and is highly parallelizable. In our approach, we first use the discrete approximations for surface gradients, p and q, using finite differences, then linearize the reflectance function in depth, Z ( x , y), instead of p and q. This method is simple and efficient, and yields better results for images with central illumination or low-angle illumination. Furthermore, our method is more general, and can be applied to either Lambertian surfaces or specular surfaces. The algorithm has been tested on several synthetic and real images of both Lambertian and specular surfaces, and good results have been obtained. However, our method assumes that the input image contains only single object with uniform albedo values, which is commonly assumed in most SFS methods. Our algorithm performs poorly on images with nonuniform albedo values and produces incorrect shape for images containing objects with scale ambiguity, because those images violate the basic assumptions made by our SFS method. Therefore, we extended our method for images with nonuniform albedo values. We first estimate the albedo values for each pixel, and segment the scene into regions with uniform albedo values. Then we adjust the intensity value for each pixel by dividing the corresponding albedo value before applying our linear shape from shading method. This way our modified method is able to deal with nonuniform albedo values. When multiple objects differing only in scale are present in a scene, there may be points with the same surface orientation but different depth values. No existing SFS methods can solve this kind of ambiguity directly. We also present a new approach to deal with images containing multiple objects with scale ambiguity. A depth estimate is derived from patches using a minimum downhill approach and re-aligned based on the background information to get the correct depth map. Experimental results are presented for several synthetic and real images. Finally, this thesis also investigates the problem of the discrete approximation under perspective projection. The straightforward finite difference approximation for surface gradients used under orthographic projection is no longer applicable here. because the image position components are in fact functions of the depth. In this thesis, we provide a direct solution for the discrete approximation under perspective projection. The surface gradient is derived mathematically by relating the depth value of the surface point with the depth value of the corresponding image point. We also demonstrate how we can apply the new discrete approximation to a more complicated and realistic reflectance model for SFS problem.
Show less - Date Issued
- 1995
- Identifier
- CFR0000191, ucf:53139
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0000191
- Title
- View-centric reasoning about parallel and distributed computation.
- Creator
-
Smith, Marc L., Parsons, Rebecca J.; Hughes, Charles E., Engineering and Computer Science
- Abstract / Description
-
University of Central Florida College of Engineering Thesis; The development of distributed applications has not progressed as rapidly as its enabling technologies. In part, this is due to the difficulty of reasoning about such complex systems. In contrast to sequential systems, parallel systems give rise to parallel events, and the resulting uncertainty of the observed order of these events. Loosely coupled distributed systems complicate this even further by introducing the element of...
Show moreUniversity of Central Florida College of Engineering Thesis; The development of distributed applications has not progressed as rapidly as its enabling technologies. In part, this is due to the difficulty of reasoning about such complex systems. In contrast to sequential systems, parallel systems give rise to parallel events, and the resulting uncertainty of the observed order of these events. Loosely coupled distributed systems complicate this even further by introducing the element of multiple imperfect observers of these parallel events. The goal of this dissertation is to advance parallel and distributed systems development by producing a parameterized model that can be instantiated to reflect the computation and coordination properties of such systems. The result is a model called paraDOS that we show to be general enough to have instantiations of two very distinct distributed computation models, Actors and tuple space. We show how paraDOS allows us to use operational semantics to reason about computation when such reasoning must account for multiple, inconsistent and imperfect views. We then extend the paraDOS model with an abstraction to support composition of communicating computational systems. This extension gives us a tool to reason formally about heterogeneous systems, and about new distributed computing paradigms such as the multiple tuple spaces support seen in Sun's JavaSpaces and IBM's T Spaces.
Show less - Date Issued
- 2000
- Identifier
- CFR0000189, ucf:53138
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0000189
- Title
- An Examination of Statewide Mandates in Economic Education and of the Programs Developed to Implement these Mandates.
- Creator
-
Frye, Virginia C., Hicks, Robert E., Business Administration
- Abstract / Description
-
University of Central Florida College of Business Administration Thesis
- Date Issued
- 1979
- Identifier
- CFR0011948, ucf:53137
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0011948
- Title
- Advertising's Effect on Young Children: An Exploratory Study of General Influences, External Conflicts, and Inner Frustrations.
- Creator
-
Neuman, Terry A., Meeske, Milan D., Social Sciences
- Abstract / Description
-
Florida Technological University College of Social Sciences Thesis
- Date Issued
- 1974
- Identifier
- CFR0011953, ucf:53136
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0011953
- Title
- A GPSS/360 Computer Model for Simulation of Automobile Traffic at Intersections.
- Creator
-
Golovcsenko, Igor V., ,, Engineering
- Abstract / Description
-
Florida Technological University College of Engineering Thesis
- Date Issued
- 1974
- Identifier
- CFR0011598, ucf:53135
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0011598
- Title
- An Application of Operant Conditioning in an Organizational Setting.
- Creator
-
Knight, Patricia J., Burroughs, Wayne A., Social Sciences
- Abstract / Description
-
Florida Technological University College of Social Sciences Thesis
- Date Issued
- 1974
- Identifier
- CFR0012665, ucf:53134
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0012665
- Title
- Finite impulse response filter design using cosine series functions.
- Creator
-
Bishop, Carlton Delos, Malocha, Donald C., Engineering
- Abstract / Description
-
Window functions have been extensively used for the design of SAW filters. The classical truncated cosine series functions, such as the Hamming and Blackmann functions, are only a few of an infinite set of such functions. The derivation of this set of functions from orthonormal basis sets and the criteria for obtaining the constant coefficients of the functions are presented. These functions are very useful because of the closed-form expressions and their easily recognizable Fourier transform...
Show moreWindow functions have been extensively used for the design of SAW filters. The classical truncated cosine series functions, such as the Hamming and Blackmann functions, are only a few of an infinite set of such functions. The derivation of this set of functions from orthonormal basis sets and the criteria for obtaining the constant coefficients of the functions are presented. These functions are very useful because of the closed-form expressions and their easily recognizable Fourier transform. Another approach to the design of Gaussian shaped filters having a desired sidelobe level using a 40 term cosine series will be presented as well. This approach is again non-iterative and a near equi-ripple sidelobe level filter could be achieved. A deconvolution technique will also be presented. this has the advantage of being non-iterative, simple and fast. This design method produces results comparable to the Dolph-Chebyshev technique.
Show less - Date Issued
- 1988
- Identifier
- CFR0013088, ucf:53133
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0013088
- Title
- An Investigation of High Anxiety Verbal Behavior.
- Creator
-
Wright, John W., Taylor, Phillip, Social Sciences
- Abstract / Description
-
Florida Technological University College of Social Sciences Thesis
- Date Issued
- 1973
- Identifier
- CFR0012240, ucf:53132
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0012240
- Title
- A Mathematical Model for Determining the Thermal Distribution Resulting from Discharge of a Heated Effluent.
- Creator
-
Epstein, Alan H., Nimmo, Bruce, Engineering
- Abstract / Description
-
Florida Technological University College of Engineering Thesis; A mathematical model is presented for the problem of determining the two-dimensional temperature distribution resulting from the discharge of a heated effluent into a shallow, quiescent receptacle. The physical model ofr the problem is the two-dimensional jet augmented by an imposed condition of viscous drag due to bottom friction effects. By virtue of the assumption that the physical properties of the effluent are independent of...
Show moreFlorida Technological University College of Engineering Thesis; A mathematical model is presented for the problem of determining the two-dimensional temperature distribution resulting from the discharge of a heated effluent into a shallow, quiescent receptacle. The physical model ofr the problem is the two-dimensional jet augmented by an imposed condition of viscous drag due to bottom friction effects. By virtue of the assumption that the physical properties of the effluent are independent of temperature over the operational temperature range of the plume, the analysis separates the total problem into a flow problem and a temperature problem. Solution of the temperature distribution is accomplished both analytically and numerically. Analytically, the temperature distribution is found through sequential integral solution of the equations defining the mathematical model, under the physical assumptions of a Gaussian flow distribution and the following relationship between the velocity and temperature distributions: [formula] where the subscript (max) denotes conditions along the jet centerline. Numerically, the equations defining the mathematical model are solved by a finite differencing technique implemented with the aid of an I.B.M. 360 digital computer. Comparison of the predictions of the model with the classical two-dimensional momentum jet indicate that the model is a reasonable approximation of the real physical problem. In addition, there is seen to be a critical dependence of the flow in the plume on the depth of the receptacle.
Show less - Date Issued
- 1972
- Identifier
- CFR0012146, ucf:53131
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0012146
- Title
- Computer Method for Airport Noise Exposure Forecast.
- Creator
-
Bateman, John M., Ventre, Gerald G., Engineering
- Abstract / Description
-
Florida Technological University College of Engineering Thesis; The major problem facing air transportation for the next decade is aircraft noise. The noise level due to the operation of large jet aircraft has created a very serious annoyance problem to the people living near of adjacent to jet airports. The noise problem has developed both for take-off and landing operations of these aircraft with take -off noise causing the greatest annoyance factor. A technique called Noise Exposure...
Show moreFlorida Technological University College of Engineering Thesis; The major problem facing air transportation for the next decade is aircraft noise. The noise level due to the operation of large jet aircraft has created a very serious annoyance problem to the people living near of adjacent to jet airports. The noise problem has developed both for take-off and landing operations of these aircraft with take -off noise causing the greatest annoyance factor. A technique called Noise Exposure Forcast (NEF) has been developed to identify the annoyance factor of these noises to people and activities on the ground. With these NEF ratings or numbers, planners can better determined the type of buildings and activities to locate in the vicinity of airports. This paper presents a computer method for determining NEF areas or contours which eliminate the necessity of performing laborous hand calculations and iterations normally required to determine a given NEF locus about an airport. A land use compatability table showing land use versus NEF numbers is given on page 3. A sample computer program is given on pages 21 through 25 of teh appendix and a sample computer output page is given on page 26. The computer technique developed for this paper can be used for any airport.
Show less - Date Issued
- 1972
- Identifier
- CFR0012156, ucf:53130
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0012156
- Title
- An Investigation of Methods for Reuse of Rubber Tires.
- Creator
-
Armbruster, Charles E., Block, David T., Engineering
- Abstract / Description
-
Florida Technological University College of Engineering Thesis; Methods of reusing/recycling the more than 250 million automobile and truck tires whicha re wron out each year were investigated. The existing methods of reusing tires account for about 30 percent of the volume of scrap tires gnerated each year. These methods are, Retreading, Reclaiming (by reducing to ground up rubber and fiber), and Tire Splitting (stamp items out of sidewall and tread areas). Several possibilities for reusing...
Show moreFlorida Technological University College of Engineering Thesis; Methods of reusing/recycling the more than 250 million automobile and truck tires whicha re wron out each year were investigated. The existing methods of reusing tires account for about 30 percent of the volume of scrap tires gnerated each year. These methods are, Retreading, Reclaiming (by reducing to ground up rubber and fiber), and Tire Splitting (stamp items out of sidewall and tread areas). Several possibilities for reusing/recycling the unused 70 percent were discovered. These methods are as follows: Destructive Distillation -- a method of recovering chemicals from tires by pyrolitic action. It is anticipated that eventually as much as 60 percent of all scrap tires may be reused by this method. Explanded Reclaimer Usage -- The use of crumb rubber as an asphalt additive will improve life and durability of highway paving as much as 300 percent. Artificial Reefs -- The tires are compressed and banded then dumped in the ocean to expand old or create new reefs. Carbon Black -- A method whereby the tire is carburized and the resulting carbon black used in new tire formulation. An investigation of the possibility of using one or more of the above methods for the East Central Florida area indicates that artificial reefs should provide the most useful, least cost method for disposal of scrap tires.
Show less - Date Issued
- 1972
- Identifier
- CFR0012932, ucf:53129
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0012932