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- Title
- DIGITAL INTERACTIVE GAMES FOR ASSESSMENT: A STUDY OF THE EFFECTIVENESS OF A DIGITAL GAME AS A MEASURE OF STUDENTS' UNDERSTANDING OF BOOLEAN LOGIC.
- Creator
-
Haji Mohammad Ali Sabbagh, Shabnam, Moshell, Jack, Underberg, Natalie, Lindgren, Robb, University of Central Florida
- Abstract / Description
-
Digital games have been used mostly for entertainment but recently researchers have started to use digital games in other areas such as education and training. Researchers have shown that digital games can provide a compelling, creative, and collaborative environment for learning. However, the popularity of computers and the Internet brings this question to mind: Are the assessment methods falling behind and remaining traditional? Will the traditional methods of learning and knowledge...
Show moreDigital games have been used mostly for entertainment but recently researchers have started to use digital games in other areas such as education and training. Researchers have shown that digital games can provide a compelling, creative, and collaborative environment for learning. However, the popularity of computers and the Internet brings this question to mind: Are the assessment methods falling behind and remaining traditional? Will the traditional methods of learning and knowledge assessment be sufficient for this new generation who are starving for new technology?This study investigates the effectiveness of using a digital interactive game as an assessments method (-) in this case a mini-game that was designed to assess the student's knowledge on basic Boolean logic. The study reports on the performance differences of the students who participated in this study and correlations between the performance of these students in a digital interactive game, written tests and their in-class performance to examine the effectiveness of using a digital game as a new knowledge assessment method.
Show less - Date Issued
- 2014
- Identifier
- CFE0005343, ucf:50494
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005343
- Title
- EFFECTS OF A COMPUTER GAME ON MATHEMATICS ACHIEVEMENT AND CLASS MOTIVATION: AN EXPERIMENTAL STUDY.
- Creator
-
kebritchi, Mansureh, Hirumi, Atsusi, University of Central Florida
- Abstract / Description
-
In the last few years educational computer games have gained attention as a tool for facilitating learning in different sectors of society including but not limited to military, health, and education. However, advances in computer game technology continue to outpace research on its effectiveness. Few empirical studies have investigated the effects of educational games in the context of formal K-12 settings. The purpose of this study was to examine the effects of a series of mathematics...
Show moreIn the last few years educational computer games have gained attention as a tool for facilitating learning in different sectors of society including but not limited to military, health, and education. However, advances in computer game technology continue to outpace research on its effectiveness. Few empirical studies have investigated the effects of educational games in the context of formal K-12 settings. The purpose of this study was to examine the effects of a series of mathematics computer games on mathematics achievement and motivation of high school students. In addition, the role of prior mathematics knowledge, computer skill, and English language skill of the participants on their mathematics achievement and motivation when they played the games were investigated. A total of 193 students and 10 teachers from an urban high school in the southeast of the United States of the America participated in this study. The teachers were randomly assigned to treatment and control groups. Students' mathematics achievement was measured using school district benchmark exams and a game performance test generated by the developers of the mathematics games. A mathematics motivation questionnaire based on Keller's (1987a) ARCS model of motivational design measured students' mathematics motivation. Multivariate Analysis of Co-Variance (MANCOVA) was conducted to analyze the data. In addition, interviews were conducted to cross validate the results of the quantitative data. The MANCOVA results indicated significant improvement of the mathematics achievement of the experimental versus control group. No significant improvement was found in the motivation of the experimental versus control group. However, a significant improvement was found on the motivation scores of the students who played the games in their school lab and classrooms compared to the ones who played the games only in the school labs. In addition, the findings indicated that prior mathematics knowledge, computer skill and English language skill did not play significant roles in achievement and motivation of the experimental group. Teachers' interviews revealed that these individual differences had indeed played significant roles in game-playing at the beginning of using the games, but the impacts gradually diminished as the students gained the required game-playing skills. The overall results indicated that the mathematics games used in this study were effective teaching and learning tools to improve the mathematics skills of the students. Using the games in mathematics education was suggested by the teachers as an appropriate alternative way of teaching, as one of the teachers stated: "This is definitely the way that we have to go to teach mathematics in the future." Mathematics games should be integrated with classroom activities if teachers want to increase mathematics class motivation. Teachers' helps and supports are vital in using the games effectively in a population with different prior mathematics knowledge, computer skills, and English language skills.
Show less - Date Issued
- 2008
- Identifier
- CFE0002066, ucf:47577
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002066
- Title
- DESIGN AND ASSESSMENT OF COMPACT OPTICAL SYSTEMS TOWARDS SPECIAL EFFECTS IMAGING.
- Creator
-
Chaoulov, Vesselin, Rolland, Jannick, University of Central Florida
- Abstract / Description
-
A main challenge in the field of special effects is to create special effects in real time in a way that the user can preview the effect before taking the actual picture or movie sequence. There are many techniques currently used to create computer-simulated special effects, however current techniques in computer graphics do not provide the option for the creation of real-time texture synthesis. Thus, while computer graphics is a powerful tool in the field of special effects, it is neither...
Show moreA main challenge in the field of special effects is to create special effects in real time in a way that the user can preview the effect before taking the actual picture or movie sequence. There are many techniques currently used to create computer-simulated special effects, however current techniques in computer graphics do not provide the option for the creation of real-time texture synthesis. Thus, while computer graphics is a powerful tool in the field of special effects, it is neither portable nor does it provide work in real-time capabilities. Real-time special effects may, however, be created optically. Such approach will provide not only real-time image processing at the speed of light but also a preview option allowing the user or the artist to preview the effect on various parts of the object in order to optimize the outcome. The work presented in this dissertation was inspired by the idea of optically created special effects, such as painterly effects, encoded in images captured by photographic or motion picture cameras. As part of the presented work, compact relay optics was assessed, developed, and a working prototype was built. It was concluded that even though compact relay optics can be achieved, further push for compactness and cost-effectiveness was impossible in the paradigm of bulk macro-optics systems. Thus, a paradigm for imaging with multi-aperture micro-optics was proposed and demonstrated for the first time, which constitutes one of the key contributions of this work. This new paradigm was further extended to the most general case of magnifying multi-aperture micro-optical systems. Such paradigm allows an extreme reduction in size of the imaging optics by a factor of about 10 and a reduction in weight by a factor of about 500. Furthermore, an experimental quantification of the feasibility of optically created special effects was completed, and consequently raytracing software was developed, which was later commercialized by SmARTLens(TM). While the art forms created via raytracing were powerful, they did not predict all effects acquired experimentally. Thus, finally, as key contribution of this work, the principles of scalar diffraction theory were applied to optical imaging of extended objects under quasi-monochromatic incoherent illumination in order to provide a path to more accurately model the proposed optical imaging process for special effects obtained in the hardware. The existing theoretical framework was generalized to non-paraxial in- and out-of-focus imaging and results were obtained to verify the generalized framework. In the generalized non-paraxial framework, even the most complex linear systems, without any assumptions for shift invariance, can be modeled and analyzed.
Show less - Date Issued
- 2005
- Identifier
- CFE0000513, ucf:46447
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000513
- Title
- THE EFFECTS ADVERTISING PLAYS ON COLLEGE STUDENTS' MORAL INTENTIONS BEYOND PURCHASE BEHAVIOR.
- Creator
-
Crockett, William, Massiah, Carolyn, University of Central Florida
- Abstract / Description
-
Advertisements affect our daily lives and as technology and the practice of marketing has developed over the course of history, we have become exposed to greater amounts of product and service campaigns. The purpose of advertisements is to educate the consumer with the goal of ultimately selling the product, and many companies and organizations would not be able to survive without the use of advertisements. Ultimately, it is a necessity for a business to prosper in a competitive market, but...
Show moreAdvertisements affect our daily lives and as technology and the practice of marketing has developed over the course of history, we have become exposed to greater amounts of product and service campaigns. The purpose of advertisements is to educate the consumer with the goal of ultimately selling the product, and many companies and organizations would not be able to survive without the use of advertisements. Ultimately, it is a necessity for a business to prosper in a competitive market, but there are possible side-effects for the consumer that are beyond the intentions to buy. The purpose of this thesis is to explore the effects advertisements play on the college student in particular. Different static/multi media advertisements have been shown to various college students ranging in gender and background to discover the comprehensive ramifications of specific promotions to study the moral and ethical impact that advertisements play on students' moral intent. An analysis and conclusion will be given, along with ideas for possible future studies. Recommendations will also be stated for marketers to be morally responsible for the advertisements they portray so the audience is not effected in a way that can lead to unwanted consequences. Ultimately, the results did not support the original hypotheses, leading to thought- provoking questions concerning our current marketing practices and the effectiveness of static and multimedia advertisements on college students. Future studies need to take place to reveal the accuracy of the study and to ultimately answer the question, "Are current advertisements influencing the audience at hand?"
Show less - Date Issued
- 2012
- Identifier
- CFH0004250, ucf:44899
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004250
- Title
- Designing Calorie Counter Smartphone Applications for Effective Weight Loss.
- Creator
-
Milliard, Sharlin, Fanfarelli, Joseph, Bockelman, Patricia, Hartshorne, Richard, University of Central Florida
- Abstract / Description
-
Poor dietary choices and lack of physical activity are two main contributing factors for the increasing prevalence of overweight and obesity in the United States. Overweight and obese individuals are at risk for developing major life-threatening diseases. Weight loss is an effective means for reversing these adverse health effects, and smartphone applications (apps) may be an effective means for supporting weight loss outside of formal clinical settings. This study involved identifying...
Show morePoor dietary choices and lack of physical activity are two main contributing factors for the increasing prevalence of overweight and obesity in the United States. Overweight and obese individuals are at risk for developing major life-threatening diseases. Weight loss is an effective means for reversing these adverse health effects, and smartphone applications (apps) may be an effective means for supporting weight loss outside of formal clinical settings. This study involved identifying factors that contribute to effective weight loss to compare with functionality commonly found in a sample of calorie counter apps. A content analysis was performed using a design framework that included a conceptual model describing the interaction of behaviors for effective weight loss and functional design requirements based upon behavior change and motivation to achieve weight loss. The requirements were used to analyze the presence of features in a sample of popular calorie counting apps, to infer their capability in supporting users' motivation to achieve weight loss. Results indicated that app features might not provide sufficient support to facilitate effective weight loss. Lack of supportive features affects perceived autonomy, relatedness, and competence, reducing motivation. This study provided guidelines to improve the design of calorie counter apps to include more features that support users as they engage in weight loss behaviors. The guidelines may become practical for use in mHealth apps used as part of formal and informal weight management strategies. Implications for future research involving wearable technologies and the use of gamified design strategies are discussed.
Show less - Date Issued
- 2019
- Identifier
- CFE0007838, ucf:52824
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007838
- Title
- A Value Sensitive Design Approach to Adolescent Mobile Online Safety.
- Creator
-
Ghosh, Arup Kumar, ,, University of Central Florida
- Abstract / Description
-
With the rise of adolescent smartphone use, concerns about teen online safety are also on the rise. A number of parental control apps are available for mobile devices, but adoption of these apps has been markedly low. To better understand these apps, their users, and design opportunities in the space of mobile online safety for adolescents, we have conducted four studies informed by the principles of Value Sensitive Design (VSD). In Study 1 (Chapter 2), we conducted a web-based survey of 215...
Show moreWith the rise of adolescent smartphone use, concerns about teen online safety are also on the rise. A number of parental control apps are available for mobile devices, but adoption of these apps has been markedly low. To better understand these apps, their users, and design opportunities in the space of mobile online safety for adolescents, we have conducted four studies informed by the principles of Value Sensitive Design (VSD). In Study 1 (Chapter 2), we conducted a web-based survey of 215 parents and their teens (ages 13-17) using two separate logistic regression models (parent and teen) to examine the factors that predicted parental use of technical monitoring apps on their teens' mobile devices. Both parent and teen models confirmed that low autonomy granting (e.g., authoritarian) parents were the most likely to use parental control apps. The teen model revealed additional nuances, indicating that teens who were victimized online and had peer problems were more likely to be monitored by their parents. Overall, increased parental control was associated with more (not fewer) online risks. In Study 2 (Chapter 3), we conducted a structured, qualitative feature analysis of 75 Android mobile apps designed for promoting adolescent online safety. We found that the available apps overwhelmingly supported parental control through restriction and monitoring over teen self-regulation or parental active mediation. In Study 3 (Chapter 4), we conducted a qualitative analysis of 736 reviews of 37 mobile online safety apps from Google Play that were publicly posted and written by teens. Our results indicate that teen ratings were significantly lower than that of parents with 76% of the teen reviews giving apps a single star. Teens felt that the apps were overly restrictive and invasive of their personal privacy, negatively impacting their relationships with their parents. For our final study (Chapter 5), we developed a mobile app prototype suggesting alternative designs for keeping teens safe online and conducted a user study which showed that parents and children (ages 10-17) both significantly preferred our new app design over existing parental control apps. Both parents and children reported that our VSD informed design is less privacy-invasive for children and would improve communication and trust relationship between them. Yet, more work needs to be done to improve approaches for risk detection and mediation that support online safety. In summary, this research will enable researchers and designers to create more effective solutions for teen online safety that will help promote more positive parent-teen relationships.
Show less - Date Issued
- 2018
- Identifier
- CFE0007181, ucf:52256
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007181
- Title
- ARCHITECTURAL SUPPORT FOR IMPROVING COMPUTER SECURITY.
- Creator
-
Kong, Jingfei, Zhou, Huiyang, University of Central Florida
- Abstract / Description
-
Computer security and privacy are becoming extremely important nowadays. The task of protecting computer systems from malicious attacks and potential subsequent catastrophic losses is, however, challenged by the ever increasing complexity and size of modern hardware and software design. We propose several methods to improve computer security and privacy from architectural point of view. They provide strong protection as well as performance efficiency. In our first approach, we propose a new...
Show moreComputer security and privacy are becoming extremely important nowadays. The task of protecting computer systems from malicious attacks and potential subsequent catastrophic losses is, however, challenged by the ever increasing complexity and size of modern hardware and software design. We propose several methods to improve computer security and privacy from architectural point of view. They provide strong protection as well as performance efficiency. In our first approach, we propose a new dynamic information flow method to protect systems from popular software attacks such as buffer overflow and format string attacks. In our second approach, we propose to deploy encryption schemes to protect the privacy of an emerging non-volatile main memory technology – phase change memory (PCM). The negative impact of the encryption schemes on PCM lifetime is evaluated and new methods including a new encryption counter scheme and an efficient error correct code (ECC) management are proposed to improve PCM lifetime. In our third approach, we deconstruct two previously proposed secure cache designs against software data-cache-based side channel attacks and demonstrate their weaknesses. We propose three hardware-software integrated approaches as secure protections against those data cache attacks. Also we propose to apply them to protect instruction caches from similar threats. Furthermore, we propose a simple change to the update policy of Branch Target Buffer (BTB) to defend against BTB attacks. Our experiments show that our proposed schemes are both security effective and performance efficient.
Show less - Date Issued
- 2010
- Identifier
- CFE0003211, ucf:48589
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003211
- Title
- INTELLIGENT DESIGN.
- Creator
-
Dudziak, Jillian, Poindexter, Carla, University of Central Florida
- Abstract / Description
-
As human beings we are designed and created in a fabric that is profound and complex. We are built with a framework where mind and body work in a concerted effort to maintain our lives automatically. A deep and defining part of our existence as humans is not just the innate desire to live but to live in consistent well-beingemotionally, physically, and mentally. I believe when we incorporate our knowledge of human physiology into our creative process then we allow ourselves a greater...
Show moreAs human beings we are designed and created in a fabric that is profound and complex. We are built with a framework where mind and body work in a concerted effort to maintain our lives automatically. A deep and defining part of our existence as humans is not just the innate desire to live but to live in consistent well-beingemotionally, physically, and mentally. I believe when we incorporate our knowledge of human physiology into our creative process then we allow ourselves a greater opportunity to create an authentic connection with our intended audience. My work during the past three years has been rooted in the study of these philosophical and scientific principles. I created a series of visual experimentations that aim to assist in my understanding of human beings at an emotional and biological level. Armed with a deep desire to understand humanity, my goal is to create work that fosters positive change and has significant impact in the world. My past and present research has been focused on human emotions, the intuitive creative process and the relationship between technology and establishing social identity.
Show less - Date Issued
- 2011
- Identifier
- CFE0003693, ucf:48844
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003693
- Title
- GUIDELINES FOR TWENTY-FIRST CENTURY INSTRUCTIONAL DESIGN AND TECHNOLOGY USE: TECHNOLOGIES' INFLUENCE ON THE BRAIN.
- Creator
-
Gabriel, Jennifer, Flammia, Madelyn, University of Central Florida
- Abstract / Description
-
The increasingly global environment has spurred the economy in the United States as well as the economies in nearly every other nation. Although the U.S. remains the world leader in the global economy, research shows that the United States is at risk of losing its place as the world leader in science and innovation. Policymakers have recognized the need for research addressing global competitiveness. President Bush signed the America Competes Act, which calls for increased investment in...
Show moreThe increasingly global environment has spurred the economy in the United States as well as the economies in nearly every other nation. Although the U.S. remains the world leader in the global economy, research shows that the United States is at risk of losing its place as the world leader in science and innovation. Policymakers have recognized the need for research addressing global competitiveness. President Bush signed the America Competes Act, which calls for increased investment in innovation and education to improve U.S. competitiveness and President Barack Obama has named a platform, "Science, Technology and Innovation for a New Generation" which will extend and prioritize the efforts to improve math and science education. K‐12 U.S. students are graduating from high school unprepared to pursue degrees in science, technology, engineering and math (STEM) in college. Without STEM degrees they will be unable to pursue technology jobs after graduation. Statistics show that the U.S. is failing to produce as many graduates in STEM as other countries. In an increasingly global world, without graduates in STEM courses the U.S. is at risk of losing its position as the economic world leader. Government, industry and academia all agree that the U.S. needs to address education on a K‐12 level to ensure that U.S. students are equipped with twenty‐first century skills to compete in a twenty‐first century global economy. Twenty‐first century students are different from students of previous generations. Researchers argue that changes in the environment, specifically an increased exposure to technology, have changed the brains of twenty‐first century students; twenty‐first century students learn differently. However, twenty‐first century students are being taught with an instructional curriculum that was designed for a previous generation that did not have the same exposure to technology. This is causing a digital‐divide that is hindering the achievement of students. The instructional curriculum needs to be updated to meet the needs of twenty‐first century students. This thesis addresses this need from a technical communication perspective by arguing that the instructional design of twenty‐first century learning materials should be improved by adhering to guidelines for twenty‐first century learning characteristics and twenty‐first century technology use. The guidelines support a national goal to improve K‐12 achievement in order to increase U.S. STEM graduates and increase the U.S.'s ability to compete in a global economy.
Show less - Date Issued
- 2009
- Identifier
- CFE0002704, ucf:48183
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002704
- Title
- COMPUTER TECHNOLOGYIN THE DESIGN PROCESS.
- Creator
-
Montague, Gregory, Scott, Bert, University of Central Florida
- Abstract / Description
-
This is a study of computer technologyÂÂ's impact on the theatrical design process. The tools of communication provided by technology were studied, and an analysis was conducted in the classroom of Digital Rendering, Digital Rendering Videos, and 3d CADD. After-wards, these tools were applied to an actual production of West Side Story where, with the addition of 3d light simulation software, the tools were used to communicate the design ideas from the lighting designer...
Show moreThis is a study of computer technologyÂÂ's impact on the theatrical design process. The tools of communication provided by technology were studied, and an analysis was conducted in the classroom of Digital Rendering, Digital Rendering Videos, and 3d CADD. After-wards, these tools were applied to an actual production of West Side Story where, with the addition of 3d light simulation software, the tools were used to communicate the design ideas from the lighting designer to the director. The goal of this process was to provide a ÂÂ"real to lifeÂÂ" virtual representation of the show to the director with the least amount of confusion. An additional goal was to test the limits and functions of the software; trying to learn all the benefits that could be provided to the process of mounting a theatrical production.
Show less - Date Issued
- 2010
- Identifier
- CFE0003032, ucf:48365
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003032
- Title
- DESIGNING AN EXPERIENTIAL WEB-BASED LEARNING MODEL TO DELIVER THE ACQUISITION AND APPLICATION OF KNOWLEDGE TO HOSPITALITY EVENT MANAGEMENT STUDENTS USING ROLE-PLAY SIMULATIONS.
- Creator
-
Hogg, James, Gunter, Glenda, University of Central Florida
- Abstract / Description
-
ABSTRACT Most hospitality institutions have increasingly moved classes online but are concerned about migrating classes and instructional content online. The concern is most Web-based models are designed to deliver the acquisition of knowledge but lack the ability to transform that knowledge into applied career skills for practical use in the industry. The purpose of this study was to test a new Web-based instructional model. The model supported delivering both the acquisition and application...
Show moreABSTRACT Most hospitality institutions have increasingly moved classes online but are concerned about migrating classes and instructional content online. The concern is most Web-based models are designed to deliver the acquisition of knowledge but lack the ability to transform that knowledge into applied career skills for practical use in the industry. The purpose of this study was to test a new Web-based instructional model. The model supported delivering both the acquisition and application of knowledge. Educators, researchers, and practitioners can utilize the new model to enhance the application of career skills and enhance organizational objectives by providing just-in-time training. The new Web-based instructional model can be delivered through multiple platforms including computers, electronic devices, wireless devices and mobile devices. The application of knowledge was delivered through experiential role-play exercises delivered live to the comparison group and virtual, inside Second Life, to the treatment group. An Analysis of Co-Variance (ANCOVA) revealed a significant difference between groups with higher application scores for the students who received the role-play live compared to virtual. In addition, an analysis was conducted to explore factors to consider when examining the cost effectiveness of Web-based instructional content. Factors determined to be important were developmental costs, delivery costs, and reusability of the Web-based instruction.
Show less - Date Issued
- 2010
- Identifier
- CFE0003044, ucf:48341
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003044
- Title
- A New Methodology for Evaluating the Effectiveness of Bus Rapid Transit Strategies.
- Creator
-
Alomari, Ahmad, Al-Deek, Haitham, Eluru, Naveen, Tatari, Omer, Maboudou, Edgard, University of Central Florida
- Abstract / Description
-
Over the last few years, public transportation has become more desirable as capacity of existing roadways failed to keep up with rapidly increasing traffic demand. Buses are one of the most common modes of public transportation with low impact on network capacity, especially in small and congested urban areas. However, the use of regularly scheduled buses as the main public transport mode can become useless with the presence of traffic congestion and dense construction areas. In cases like...
Show moreOver the last few years, public transportation has become more desirable as capacity of existing roadways failed to keep up with rapidly increasing traffic demand. Buses are one of the most common modes of public transportation with low impact on network capacity, especially in small and congested urban areas. However, the use of regularly scheduled buses as the main public transport mode can become useless with the presence of traffic congestion and dense construction areas. In cases like these, innovative solutions, such as bus rapid transit (BRT), can provide an increased level of service without having to resort to other, more expensive modes, such as light rail transit (LRT) and metro systems (subways). Transit signal priority (TSP), which provides priority to approaching buses at signalized intersections by extending the green or truncating the red, can also increase the performance of the bus service.Understanding the combined impact of TSP and BRT on network traffic operations can be complex. Although TSP has been implemented worldwide, none of the previous studies have examined in depth the effects of using conditional and unconditional TSP strategies with a BRT system. The objective of this research is to evaluate the effectiveness of BRT without TSP, then with conditional or unconditional TSP strategies. The micro-simulation software VISSIM was used to compare different TSP and BRT scenarios. These simulation scenarios include the base scenario (before implementation of the TSP and BRT systems), Unconditional TSP (TSP activates for all buses), Conditional TSP 3 minutes behind (TSP only activates for buses that are 3 minutes or more behind schedule), Conditional TSP 5 minutes behind (only activates for buses 5 minutes or more behind schedule), BRT with no TSP, BRT with Unconditional TSP, BRT with Conditional TSP 3 minutes behind, and BRT with Conditional TSP 5 minutes behind.The VISSIM simulation model was developed, calibrated and validated using a variety of data that was collected in the field. These data included geometric data, (number of lanes, intersection geometries, etc.); traffic data (average daily traffic volumes at major intersections, turning movement percentages at intersections, heavy vehicle percentages, bus passenger data, etc.); and traffic control data (signal types, timings and phasings, split history, etc.). Using this field data ensured the simulation model was sufficient for modeling the test corridor. From this model, the main performance parameters (for all vehicles and for buses only) for through movements in both directions (eastbound and westbound) along the corridor were analyzed for the various BRT/TSP scenarios. These parameters included average travel times, average speed profiles, average delays, and average number of stops. As part of a holistic approach, the effects of BRT and TSP on crossing street delay were also evaluated. Simulation results showed that TSP and BRT scenarios were effective in reducing travel times (up to 26 %) and delays (up to 64%), as well as increasing the speed (up to 47%), compared to the base scenario. The most effective scenarios were achieved by combining BRT and TSP. Results also showed that BRT with Conditional TSP 3 minutes behind significantly improved travel times (17 (-) 26%), average speed (30 (-) 39%), and average total delay per vehicle (11 (-) 32%) for the main corridor through movements compared with the base scenario, with only minor effects on crossing street delays. BRT with Unconditional TSP resulted in significant crossing street delays, especially at major intersections with high traffic demand, which indicates that this scenario is impractical for implementation in the corridor. Additionally, BRT with Conditional TSP 3 minutes behind had better travel time savings than BRT with Conditional TSP 5 minutes behind for both travel directions, making this the most beneficial scenario.This research provided an innovative approach by using nested sets (hierarchical design) of TSP and BRT combination scenarios. Coupled with microscopic simulation, nested sets in the hierarchical design are used to evaluate the effectiveness of BRT without TSP, then with conditional or unconditional TSP strategies. The robust methodology developed in this research can be applied to any corridor to understand the combined TSP and BRT effects on traffic performance. Presenting the results in an organized fashion like this can be helpful in decision making. This research investigated the effects of BRT along I-Drive corridor (before and after conditions) at the intersection level. Intersection analysis demonstrated based on real life data for the before and after the construction of BRT using the Highway Capacity SoftwareTM (HCS2010) that was built based on the Highway Capacity Manual (HCM 2010) procedures for urban streets and signalized intersections. The performance measure used in this analysis is the level of service (LOS) criteria which depends on the control delay (seconds per vehicle) for each approach and for the entire intersection. The results show that implementing BRT did not change the LOS. However, the control delay has improved at most of the intersections' approaches. The majority of intersections operated with an overall LOS "C" or better except for Kirkman Road intersection (T2) with LOS "E" because it has the highest traffic volumes before and after BRT construction.This research also used regression analysis to observe the effect of the tested scenarios analyzed in VISSIM software compared to the No TSP (-) No BRT base model for all vehicles and for buses only. The developed regression model can predict the effect of each scenario on each studied Measures of Performance (MOE). Minitab statistical software was used to conduct this multiple regression analysis. The developed models with real life data input are able to predict how proposed enhancements change the studied MOEs. The BRT models presented in this research can be used for further sensitivity analysis on a larger regional network in the upcoming regional expansion of the transit system in Central Florida. Since this research demonstrated the operational functionality and effectiveness of BRT and TSP systems in this critical corridor in Central Florida, these systems' accomplishments can be expanded throughout the state of Florida to provide greater benefits to transit passengers. Furthermore, to demonstrate the methodology developed in this research, it is applied to a test corridor along International Drive (I-Drive) in Orlando, Florida. This corridor is key for regional economic prosperity of Central Florida and the novel approach developed in this dissertation can be expanded to other transit systems.
Show less - Date Issued
- 2015
- Identifier
- CFE0005918, ucf:50848
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005918
- Title
- A Case Study Evaluation of Quality Standards and Online Faculty Development.
- Creator
-
O'Brien, Erin, Gunter, Glenda, Hartshorne, Richard, Thompson, Kelvin, Vitale, Thomas, Haggerty, Dorothy, University of Central Florida
- Abstract / Description
-
This dissertation in practice was designed to provide an evaluation case study of two institutions, one college and one university, in the field of online learning and quality assurance. The writer evaluated these two institutions of higher learning to discover what online teaching criteria are required and what quality assurance processes are being used to assess the quality of the institutions' online courses. An analysis of the data revealed that both institutions were at the appropriate...
Show moreThis dissertation in practice was designed to provide an evaluation case study of two institutions, one college and one university, in the field of online learning and quality assurance. The writer evaluated these two institutions of higher learning to discover what online teaching criteria are required and what quality assurance processes are being used to assess the quality of the institutions' online courses. An analysis of the data revealed that both institutions were at the appropriate stage of development, support, training and quality assurance measures for their sizes, online populations and for the length of time they have been involved in online learning. Findings revealed that both institutions had a quality assurance process in place that is appropriate to their location, population and faculty. There is much to be learned by examining the two different credentialing and quality assurance approaches to online teaching and learning that these two different institutions employ for anyone interested in improving their institutions' processes.
Show less - Date Issued
- 2015
- Identifier
- CFE0005855, ucf:50919
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005855
- Title
- Modeling Repair Patches of Ship Hull and Studying the Effect of Their Orientation on Stresses.
- Creator
-
Enwegy, Halima, Moslehy, Faissal, Kassab, Alain, Bai, Yuanli, University of Central Florida
- Abstract / Description
-
The hull is the most important structural part of any maritime vessel. It must be adequately designed to withstand the harsh sailing environmental conditions and associated forces. In the past, the basic material used to manufacture the ship hull was wood, where the hull was usually shaped as cylindrical wooden shanks. In the present, hull designs have developed to steel columns or stiffened panels that are made of different types of materials. Panels that are stiffened orthogonally in two or...
Show moreThe hull is the most important structural part of any maritime vessel. It must be adequately designed to withstand the harsh sailing environmental conditions and associated forces. In the past, the basic material used to manufacture the ship hull was wood, where the hull was usually shaped as cylindrical wooden shanks. In the present, hull designs have developed to steel columns or stiffened panels that are made of different types of materials. Panels that are stiffened orthogonally in two or more directions and have nine independent material constants are defined as orthotropic panels, and they achieve high specific strength.This thesis presents the effect of different patch orientations on the resulting strain and stress concentrations at the area of interaction between the panel and the patch. As it is known, the behavior of stiffened plates is affected by several important parameters, e.g., length to width ratio of the panel, stiffener geometry and spacing, aspect ratio for plates between stiffeners, plate slenderness, von Mises stresses, initial distortions, boundary conditions, and type of loading. A finite element model of the ship hull has been developed and run on ABAQUS (commercially available finite element software). The stiffened panel and patch are modeled as equivalent orthotropic plates made of steel. The panel edges are considered to be simply supported, and uniaxial tension was applied to the equivalent stiffened panel in addition to the lateral pressure (from water interaction). The developed model successfully predicted the optimal orientation of the panel for maximum stress concentration reduction. Moreover, in order to minimize the severe conditions caused by the mismatch that occurs if the material properties of the patch and the panel are the same during the patching process, it is necessary to stiffened the patch more than the panel. The developed model also suggested that an isotropic layer be added at the interaction to decrease the severity of arising stresses.
Show less - Date Issued
- 2014
- Identifier
- CFE0005162, ucf:50701
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005162
- Title
- Understanding and Mitigating Sources of Teacher Dissatisfaction.
- Creator
-
Howard, Carl, Boote, David, Hopp, Carolyn, Vitale, Thomas, Hayes, Grant, University of Central Florida
- Abstract / Description
-
This dissertation in practice focuses on a review of literature to answer the guiding question, what can teachers and other educational stakeholders do to help address their sources of dissatisfaction in order to build a positive school climate? The author used a modified frame analysis from Bolman and Deal, other published literature, and personal experience to identify seven different, but sometimes related, domains that affect teachers and school climate. These seven domains include...
Show moreThis dissertation in practice focuses on a review of literature to answer the guiding question, what can teachers and other educational stakeholders do to help address their sources of dissatisfaction in order to build a positive school climate? The author used a modified frame analysis from Bolman and Deal, other published literature, and personal experience to identify seven different, but sometimes related, domains that affect teachers and school climate. These seven domains include operations/management, contract application, professional development, classroom management, interpersonal, financial, and unanticipated events. The modified frame analysis was used to help empower teachers to solve problems that affect their performance and motivation, to prevent burnout, attrition, as well as help build and maintain a positive school climate. This dissertation promotes the notion that school climate is composed of and constructed from these seven domains as constituent parts that combine to create the school climate. The author-created tool, Tools for Teachers to Address Domains of Dissatisfaction, enables teachers to quickly reference potential solutions to problems faced. The tool is a prototype, created based on professional literature sources focusing on research-based strategies to identify problems and methods a teacher can use to solve a problem, thus preventing a negative school environment for the students, staff as well as other stakeholders. The domains of dissatisfaction were tested against real-life issues submitted to a Faculty Advisory Committee in order to provide veracity and justification of the domains.
Show less - Date Issued
- 2015
- Identifier
- CFE0005956, ucf:50796
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005956
- Title
- Design and modeling of a heat exchanger for porous combustor powered steam generators in automotive industry.
- Creator
-
Dasgupta, Apratim, Orlovskaya, Nina, Gou, Jihua, Vasu Sumathi, Subith, University of Central Florida
- Abstract / Description
-
A major challenge faced by automobile manufacturers is to achieve reduction of particulate emission to acceptable standards, as the emission standards become more and more stringent. One of the ecologically friendly options to reduce emissions is to develop external combustion in a steam engine as a replacement of the internal combustion engine. There are multiple factors, other than pollution that need to be considered for developing a substitute for Internal Combustion Engine, like specific...
Show moreA major challenge faced by automobile manufacturers is to achieve reduction of particulate emission to acceptable standards, as the emission standards become more and more stringent. One of the ecologically friendly options to reduce emissions is to develop external combustion in a steam engine as a replacement of the internal combustion engine. There are multiple factors, other than pollution that need to be considered for developing a substitute for Internal Combustion Engine, like specific power, throttle response, torque speed curve, fuel consumption and refueling infrastructure. External combustion in a steam engine seems to be a bright idea, for a cleaner and more environment friendly alternative to the IC engine that can satisfy the multiple technology requirements mentioned. One way of performing external heterogeneous combustion is to use porous ceramic media, which is a modern and innovative technique, used in many practical applications. The heterogeneous combustion inside ceramic porous media provides numerous advantages, as the ceramic, acts as a regenerator that distributes heat from the flue gases to the upstream reactants, resulting in the extended flammability limits of the reactants. The heat exchanger design is the major challenge in developing an external combustion engine because of the space, such systems consume in an automobile. The goal of the research is to develop a compact and efficient heat exchanger for the application. The proposed research uses natural gas as a fuel that is mixed with air for combustion and the generated flue gases are fed to a heat exchanger to generate superheated system for performing engine work to the vehicle. The performed research is focused on designing and modeling of the boiler heat exchanger section. The justification for selection of working fluid and power plant technology is presented as part of the research, where the proposed system consists of an Air and Flue Gas Path and a Water and Steam Path. Models are developed for coupled thermal and fluid analysis of a heat exchanger, consisting of three sections. The first section converts water to a saturated liquid. The second portion consists of a section where water is converted to saturated steam. The third section is the superheater, where saturated steam is converted to superheated steam. The Finite Element Model is appropriately meshed and boundary conditions set up to solve the mass, momentum and energy conservation equations. The k-epsilon model is implemented to take care of turbulence. Analytical calculations following the established codes and standards are also executed to develop the design.
Show less - Date Issued
- 2017
- Identifier
- CFE0006579, ucf:51308
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006579
- Title
- Design Disjunction for Resilient Reconfigurable Hardware.
- Creator
-
Alzahrani, Ahmad, DeMara, Ronald, Yuan, Jiann-Shiun, Lin, Mingjie, Wang, Jun, Turgut, Damla, University of Central Florida
- Abstract / Description
-
Contemporary reconfigurable hardware devices have the capability to achieve high performance, powerefficiency, and adaptability required to meet a wide range of design goals. With scaling challenges facing current complementary metal oxide semiconductor (CMOS), new concepts and methodologies supportingefficient adaptation to handle reliability issues are becoming increasingly prominent. Reconfigurable hardware and their ability to realize self-organization features are expected to play a key...
Show moreContemporary reconfigurable hardware devices have the capability to achieve high performance, powerefficiency, and adaptability required to meet a wide range of design goals. With scaling challenges facing current complementary metal oxide semiconductor (CMOS), new concepts and methodologies supportingefficient adaptation to handle reliability issues are becoming increasingly prominent. Reconfigurable hardware and their ability to realize self-organization features are expected to play a key role in designingfuture dependable hardware architectures. However, the exponential increase in density and complexity of current commercial SRAM-based field-programmable gate arrays (FPGAs) has escalated the overheadassociated with dynamic runtime design adaptation. Traditionally, static modular redundancy techniques areconsidered to surmount this limitation; however, they can incur substantial overheads in both area andpower requirements. To achieve a better trade-off among performance, area, power, and reliability, thisresearch proposes design-time approaches that enable fine selection of redundancy level based on target reliability goals and autonomous adaptation to runtime demands. To achieve this goal, three studies were conducted:First, a graph and set theoretic approach, named Hypergraph-Cover Diversity (HCD), is introduced as a preemptive design technique to shift the dominant costs of resiliency to design-time. In particular, union-freehypergraphs are exploited to partition the reconfigurable resources pool into highly separable subsets ofresources, each of which can be utilized by the same synthesized application netlist. The diverseimplementations provide reconfiguration-based resilience throughout the system lifetime while avoiding thesignificant overheads associated with runtime placement and routing phases. Evaluation on a Motion-JPEGimage compression core using a Xilinx 7-series-based FPGA hardware platform has demonstrated thepotential of the proposed FT method to achieve 37.5% area saving and up to 66% reduction in powerconsumption compared to the frequently-used TMR scheme while providing superior fault tolerance.Second, Design Disjunction based on non-adaptive group testing is developed to realize a low-overheadfault tolerant system capable of handling self-testing and self-recovery using runtime partial reconfiguration.Reconfiguration is guided by resource grouping procedures which employ non-linear measurements given by the constructive property of f-disjunctness to extend runtime resilience to a large fault space and realize a favorable range of tradeoffs. Disjunct designs are created using the mosaic convergence algorithmdeveloped such that at least one configuration in the library evades any occurrence of up to d resource faults, where d is lower-bounded by f. Experimental results for a set of MCNC and ISCAS benchmarks havedemonstrated f-diagnosability at the individual slice level with average isolation resolution of 96.4% (94.4%) for f=1 (f=2) while incurring an average critical path delay impact of only 1.49% and area cost roughly comparable to conventional 2-MR approaches. Finally, the proposed Design Disjunction method is evaluated as a design-time method to improve timing yield in the presence of large random within-die (WID) process variations for application with a moderately high production capacity.
Show less - Date Issued
- 2015
- Identifier
- CFE0006250, ucf:51086
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006250
- Title
- A formative evaluation of a technology-mediated alternative to traditional study abroad.
- Creator
-
Howard, Wendy, Gunter, Glenda, Ramirez, Bernardo, Vitale, Thomas, Moskal, Patsy, University of Central Florida
- Abstract / Description
-
Purpose: The purpose of this study was to determine if a proposed technology-mediated intervention is a viable alternative to traditional study abroad for those who are unable to travel. While technology cannot reproduce the same experience of traveling abroad, the primary objective of this study was to determine if there is value in using Web conferencing technology to provide students with access to the same opportunity to interact with international experts in the field as their...
Show morePurpose: The purpose of this study was to determine if a proposed technology-mediated intervention is a viable alternative to traditional study abroad for those who are unable to travel. While technology cannot reproduce the same experience of traveling abroad, the primary objective of this study was to determine if there is value in using Web conferencing technology to provide students with access to the same opportunity to interact with international experts in the field as their counterparts who were able to travel. This formative evaluation is the first in a series of iterative studies aimed at developing a viable, sustainable, technology-based solution through design-based research (Reeves, 2006).Methodology/Design: Two guiding questions drove the focus of this formative evaluation: Did the program accomplish what was intended and was it implemented effectively? These generated a set of evaluation questions using the Online Learning Consortium (OLC) Quality Framework, which were used to evaluate the quality of a joint study abroad program in Brazil with students and instructors from the University of Central Florida and the University of Scranton. While studying global health management in Brazil, the group in the field broadcasted their site visits live to online participants back in the United States. Web conferencing tools allowed the online attendees to see and hear the group in Brazil and interact in real time through the audio or text chat. Evaluation data was compiled from multiple sources including an anonymous student survey, instructor interviews, session recordings, financial budgets, and online facilitator observations in order to triangulate and evaluate the effectiveness of this Web-based intervention.Findings: Web conferencing technology appears to be a viable alternative that is not necessarily as immersive as traveling abroad, but it does provide its own set of benefits to higher education students. This formative evaluation revealed clear areas for improvement, including technical and procedural elements, but instructors and online participants did find value in the experience. Was it perfect? No. Was it successful? Yes. Was it encouraging? Definitely. Exploration of the evaluation questions under each of the five pillars of the OLC Quality Framework revealed both success factors and areas for improvement in each of the following categories: learning effectiveness, scale (commitment (&) cost), access, faculty satisfaction, and student satisfaction.Implications: Overall, this was a successful proof of concept that justifies future improvements and subsequent further evaluation in an iterative design-based research program. In addition to repeating this study with the joint global health management course in Brazil, this intervention could also be implemented and evaluated in other contexts, disciplines, and countries around the world. This formative evaluation produced a set of recommendations for the next study based on the success factors as well as the areas for improvement identified in this initial implementation in addition to a list of suggestions for future research.
Show less - Date Issued
- 2015
- Identifier
- CFE0005808, ucf:50041
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005808
- Title
- Applying Problem-of-Practice Methods from the Discipline of Higher Education within the Justice System: Turning the Concept of Therapy Dogs for Child Victims into a Statewide Initiative.
- Creator
-
Holton, Jessie, Hopp, Carolyn, Vitale, Thomas, Williams-Fjeldhe, Karri, Mustaine, Elizabeth, University of Central Florida
- Abstract / Description
-
This Dissertation-in-Practice introduces a law enforcement concept-to-practice model designed by combining tested methods of organizational analysis often utilized by those in the discipline of education. The model incorporates a two phase design with the first phase focusing on implementing and evaluating innovative changes within a medium size law enforcement agency for a micro-level analysis. A second phase examines the ability to replicate the concept program on a statewide, macro-level,...
Show moreThis Dissertation-in-Practice introduces a law enforcement concept-to-practice model designed by combining tested methods of organizational analysis often utilized by those in the discipline of education. The model incorporates a two phase design with the first phase focusing on implementing and evaluating innovative changes within a medium size law enforcement agency for a micro-level analysis. A second phase examines the ability to replicate the concept program on a statewide, macro-level, by incorporating a re-design method utilizing organizational resource and structure frames. The concept applied to this model was the introduction of a therapy dog interaction during investigations involving crimes against children to reduce anxiety and increase communication. The first phase concluded that the introduction of therapy dogs during law enforcement investigations had a statistical significance in the reduction of anxiety and increased disclosure rates with child victims, without interfering with judicial policies and procedures. The second phase produced a series of flexible options allowing law enforcement agencies of all types to replicate therapy dog programs that are consistent, cost effective, and sustainable. The overall results indicate the use of this concept-to-practice model was successful in examining and introducing an innovative concept that provided a significant impact in the complex organizations of the justice system.
Show less - Date Issued
- 2015
- Identifier
- CFE0005807, ucf:50029
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005807
- Title
- Gender Dynamics from the Arab World: An Intercultural Service Encounter.
- Creator
-
Khan, Marryam, Ro, Hee Jung, Gregory, Amy, Hara, Tadayuki, University of Central Florida
- Abstract / Description
-
Arab countries strive toward the modernization and feminization of the Arab culture; however, some of these countries (i.e., Saudi Arabia) are culturally and legally governed by (")sharia law("), and have maintained cultural norms regarding segregation of the sexes. In order to have a better understanding of the Arab travelers to the U.S., this research focuses on the gender dynamics between the service providers and Arab customers during a service encounter. Specifically, this research...
Show moreArab countries strive toward the modernization and feminization of the Arab culture; however, some of these countries (i.e., Saudi Arabia) are culturally and legally governed by (")sharia law("), and have maintained cultural norms regarding segregation of the sexes. In order to have a better understanding of the Arab travelers to the U.S., this research focuses on the gender dynamics between the service providers and Arab customers during a service encounter. Specifically, this research examines how the same and opposite genders of service-provider and customer influence Arab customers' emotional response (comfort), consequently their service encounter evaluation (satisfaction), and behavioral intentions (feedback willingness). This research also examines how the employees' efforts to solicit feedback from Arab customers may intensify the effect of gender dynamics on Arab customers' responses. Scenario-based online surveys are created and distributed to respondents of Arab descent in Saudi Arabia, Bahrain, and United Arab Emirates by using snowball sampling. The results based on 326 respondents show potential differences determined by gender interaction. Arab customers were more comfortable, more satisfied with the service encounter, and more willing to provide feedback, if the employee was the same gender as the customer, as opposed to the employee being the opposite gender from the customer. However, results showed that employee efforts to solicit feedback did not intensify the gender interaction effect. Additionally, through the service encounter, the Arab customers' comfort influenced their service encounter satisfaction and their willingness to provide feedback. The findings of this research provide valuable implications for hospitality managers to better cater to the needs of Arab customers by examining the dimensions of gender boundaries in an intercultural service encounter.
Show less - Date Issued
- 2013
- Identifier
- CFE0005013, ucf:49999
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005013
