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(1 - 12 of 12)
- Title
- Active Learning with Unreliable Annotations.
- Creator
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Zhao, Liyue, Sukthankar, Gita, Tappen, Marshall, Georgiopoulos, Michael, Sukthankar, Rahul, University of Central Florida
- Abstract / Description
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With the proliferation of social media, gathering data has became cheaper and easier than before. However, this data can not be used for supervised machine learning without labels. Asking experts to annotate sufficient data for training is both expensive and time-consuming. Current techniques provide two solutions to reducing the cost and providing sufficient labels: crowdsourcing and active learning. Crowdsourcing, which outsources tasks to a distributed group of people, can be used to...
Show moreWith the proliferation of social media, gathering data has became cheaper and easier than before. However, this data can not be used for supervised machine learning without labels. Asking experts to annotate sufficient data for training is both expensive and time-consuming. Current techniques provide two solutions to reducing the cost and providing sufficient labels: crowdsourcing and active learning. Crowdsourcing, which outsources tasks to a distributed group of people, can be used to provide a large quantity of labels but controlling the quality of labels is hard. Active learning, which requires experts to annotate a subset of the most informative or uncertain data, is very sensitive to the annotation errors. Though these two techniques can be used independently of one another, by using them in combination they can complement each other's weakness. In this thesis, I investigate the development of active learning Support Vector Machines (SVMs) and expand this model to sequential data. Then I discuss the weakness of combining active learning and crowdsourcing, since the active learning is very sensitive to low quality annotations which are unavoidable for labels collected from crowdsourcing. In this thesis, I propose three possible strategies, incremental relabeling, importance-weighted label prediction and active Bayesian Networks. The incremental relabeling strategy requires workers to devote more annotations to uncertain samples, compared to majority voting which allocates different samples the same number of labels. Importance-weighted label prediction employs an ensemble of classifiers to guide the label requests from a pool of unlabeled training data. An active learning version of Bayesian Networks is used to model the difficulty of samples and the expertise of workers simultaneously to evaluate the relative weight of workers' labels during the active learning process. All three strategies apply different techniques with the same expectation -- identifying the optimal solution for applying an active learning model with mixed label quality to crowdsourced data. However, the active Bayesian Networks model, which is the core element of this thesis, provides additional benefits by estimating the expertise of workers during the training phase. As an example application, I also demonstrate the utility of crowdsourcing for human activity recognition problems.
Show less - Date Issued
- 2013
- Identifier
- CFE0004965, ucf:49579
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004965
- Title
- APPLICATION AND COMPARISON OF ACTIVE LEARNING IMPLEMENTATION METHODS IN BIOCHEMISTRY EDUCATION.
- Creator
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Thibaut, Dylan, Borgon, Robert, Caranto, Jonathan, University of Central Florida
- Abstract / Description
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Biochemistry has continued to be one of the most complex and important subjects in science education. The purpose of this research is to investigate active learning implementation methods in a Biochemistry I context to determine the most effective means of preparing current science undergraduates. Two Biochemistry I classes over two semesters were analyzed in this study, with class A using a variable active learning schedule and class B using a consistent active learning schedule. Four...
Show moreBiochemistry has continued to be one of the most complex and important subjects in science education. The purpose of this research is to investigate active learning implementation methods in a Biochemistry I context to determine the most effective means of preparing current science undergraduates. Two Biochemistry I classes over two semesters were analyzed in this study, with class A using a variable active learning schedule and class B using a consistent active learning schedule. Four aspects were analyzed to determine active learning validity: perception of different active learning properties, standardized final exam grades, class grade, and teaching implementation. The consistent schedule of daily active learning in class B showed an increase in mean final exam score by 12.72%, significantly improved mean student grade in the class from a high C to a low B (p= 0.0038), and comparing student perception of active learning data, showed a significant decrease in student desire for passive learning (p= 0.025), increased desire for active learning (p= 0.022), and increased desire for flipped classrooms (p= 0.042) after first experiencing opposite results in the first semester of implementation which had increased desire for passive learning (p= 0.003) and teacher-centric learning (p= 0.026). A variable active learning schedule showed no significant values besides an increase in individual learning desire (p= 0.037) and a marginally significant increase in desire for passive learning (p= 0.053) both in its second semester of implementation. This research supports that a consistent, daily active learning curriculum making up approximately 40-50% of daily instruction is preferable compared to a variable lecture schedule with active learning days in between lecture days in undergraduate Biochemistry I large-class instruction given that professors perform it over multiple semesters.
Show less - Date Issued
- 2019
- Identifier
- CFH2000578, ucf:45662
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000578
- Title
- MULTIZOOM ACTIVITY RECOGNITION USING MACHINE LEARNING.
- Creator
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Smith, Raymond, Shah, Mubarak, University of Central Florida
- Abstract / Description
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In this thesis we present a system for detection of events in video. First a multiview approach to automatically detect and track heads and hands in a scene is described. Then, by making use of epipolar, spatial, trajectory, and appearance constraints, objects are labeled consistently across cameras (zooms). Finally, we demonstrate a new machine learning paradigm, TemporalBoost, that can recognize events in video. One aspect of any machine learning algorithm is in the feature set used. The...
Show moreIn this thesis we present a system for detection of events in video. First a multiview approach to automatically detect and track heads and hands in a scene is described. Then, by making use of epipolar, spatial, trajectory, and appearance constraints, objects are labeled consistently across cameras (zooms). Finally, we demonstrate a new machine learning paradigm, TemporalBoost, that can recognize events in video. One aspect of any machine learning algorithm is in the feature set used. The approach taken here is to build a large set of activity features, though TemporalBoost itself is able to work with any feature set other boosting algorithms use. We also show how multiple levels of zoom can cooperate to solve problems related to activity recognition.
Show less - Date Issued
- 2005
- Identifier
- CFE0000865, ucf:46658
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000865
- Title
- Evaluating Teaching Grammar in Specific Constraints of Context: A Pilot Study in the Developmental Writing Program at Seminole State College.
- Creator
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Roney, Joshua, Marinara, Martha, Scott, John, McDaniel, Rudy, University of Central Florida
- Abstract / Description
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This pilot study investigated the efficacy of a supplemental Active Learning intervention that was administered with grammar workbook software in remedial-level composition classrooms at Seminole State College. The study analyzed student response data in a pre-test and post-test instrument in four classrooms; two followed standard methods while two incorporated the additional experimental intervention. The groups are identified in this study as either (")Standard(") or (")Experimental,(")...
Show moreThis pilot study investigated the efficacy of a supplemental Active Learning intervention that was administered with grammar workbook software in remedial-level composition classrooms at Seminole State College. The study analyzed student response data in a pre-test and post-test instrument in four classrooms; two followed standard methods while two incorporated the additional experimental intervention. The groups are identified in this study as either (")Standard(") or (")Experimental,(") according to the method administered in the classroom.The intervention was designed based on five grammar topic areas which correspond with content assessed in the pre-test and post-test. The Active Learning method required students to prepare a short, guided presentation on selected grammar topics. Findings showed that there was no significant change in improvement between the pre-test and post-test among the Standard or the Experimental groups, due in part to a relatively small sample size. A positive change approaching significant level occurred in the Experimental group in topic areas related to critical thinking. No significant or near-significant change was observed in the topic areas related to memorization in either group. Recommendations were made for further sampling, modification, and future applications of the intervention used in the study and for continued testing of grammar software used for instruction in Developmental Writing classes at Seminole State College.
Show less - Date Issued
- 2012
- Identifier
- CFE0004590, ucf:49218
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004590
- Title
- Leadership Development Programs in College Athletics: An Exploration of the Student-Athlete Experience.
- Creator
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Obrien, Jeffrey, Cintron Delgado, Rosa, Owens, J. Thomas, Preston, Michael, Harrison, Carlton, University of Central Florida
- Abstract / Description
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The purpose of this study was to explore the lived experiences and perceptions of twelve college student-athletes, from two NCAA Division I institutions, who participated in leadership development programs provided by their athletic department. There is a demonstrated need for this level of exploration as evidenced by the growing trend of college athletic departments providing leadership development programming for their respective student-athlete populations. However, there is not a...
Show moreThe purpose of this study was to explore the lived experiences and perceptions of twelve college student-athletes, from two NCAA Division I institutions, who participated in leadership development programs provided by their athletic department. There is a demonstrated need for this level of exploration as evidenced by the growing trend of college athletic departments providing leadership development programming for their respective student-athlete populations. However, there is not a commensurate level of scholarship related to the effectiveness of these programs, nor is there an understanding of the lived experiences of the student-athlete participants that is grounded in research. Therefore, this qualitative study utilized Moustakas' (1994) Transcendental Phenomenology to explore the lived experiences and perceptions of college student-athletes who participated in leadership development programs provided by their athletic department. This study applied Dweck's (2008) theory of Mindset to distill the role effort, failure, and adversity played in the participants lives, and their leadership development. Textural and structural analysis of the data revealed six themes and the essence of the phenomenon. The themes were: (1) Personal Growth and Development; (2) Skill Development; (3) Engaging Pedagogies; (4) Meaning of Effort; (5) Meaning of Failure; and (6) Problem Solving Mindset. Recommendations for college athletic departments implementing leadership development programs include: Intentionality of design; focus on personal growth and development; provide tangible skill development; and include training on growth mindset.
Show less - Date Issued
- 2018
- Identifier
- CFE0007067, ucf:51996
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007067
- Title
- PROJECT CHILD® AND NON-PROJECT CHILD® SCHOOL PERFORMANCE ON FCAT® READING, MATHEMATICS AND WRITING.
- Creator
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Chappell, Julie, Hartle, Lynn, University of Central Florida
- Abstract / Description
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Project CHILD® (Changing How Instruction for Learning is Delivered) provides an avenue for educational change using a triangulated approach. Using data from the Florida Department of Education, this research studies the Project CHILD® learning approach on preparing students for success on portions of the Florida Comprehensive Assessment Test (FCAT®) using results from fifteen charter schools in the state of Florida,...
Show moreProject CHILD® (Changing How Instruction for Learning is Delivered) provides an avenue for educational change using a triangulated approach. Using data from the Florida Department of Education, this research studies the Project CHILD® learning approach on preparing students for success on portions of the Florida Comprehensive Assessment Test (FCAT®) using results from fifteen charter schools in the state of Florida, seven participating in Project CHILD® and eight non-participating charter schools for the 2008-2009 school-year. Dispersion statistics such as range and standard deviation as well as independent t tests are computed to compare the percentage of students in grades three to five scoring levels 3 and higher on the reading and mathematics portions, and fourth grade students scoring a 3.5 or higher on the writing assessment of the FCAT®. Project CHILD® schools had smaller ranges and standard deviations in the majority of the comparisons. Descriptively, this suggests that students in the Project CHILD® schools are performing closer to the school average. There were no statistically significance differences between the Project CHILD® schools and non-Project CHILD® schools for grade level comparisons, nor on any grade level aggregate outcomes (i.e., grades 3-5 school FCAT® reading, mathematics, or writing mean). However moderate effect sizes were seen for reading in grade four and writing assessments in grade four. The non-statistically significant findings were likely due to low power, and the moderate effect sizes suggest evidence of practical significance.
Show less - Date Issued
- 2010
- Identifier
- CFE0003355, ucf:48444
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003355
- Title
- Extracurricular Activities and Substance Use Among Adolescents: A Test of Social Control and Social Learning Theory.
- Creator
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Coto, Lynnette, Ford, Jason, Corzine, Harold, Reckdenwald, Amy, University of Central Florida
- Abstract / Description
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The current research examines correlates of adolescent substance use with a focus on extracurricular activities. Given that marijuana is the most widely used illicit drug, and binge drinking can have an early onset the examinations of these two substances were important. Many studies have researched the correlation between substance use and sports, but have not included other extracurricular activities such as academic and fine art clubs. The current research fills this gap in the literature...
Show moreThe current research examines correlates of adolescent substance use with a focus on extracurricular activities. Given that marijuana is the most widely used illicit drug, and binge drinking can have an early onset the examinations of these two substances were important. Many studies have researched the correlation between substance use and sports, but have not included other extracurricular activities such as academic and fine art clubs. The current research fills this gap in the literature by using the National Longitudinal Study of Adolescent Health (Add Health) and by testing Hirschi's (1969) Social Control Theory and Aker's (1985) Social Learning Theory. The current research identified fine art and academic clubs as protective factors for adolescent substance use. There is limited research on the link between adolescent substance use and extracurricular activities and based on my findings that academic and fine arts clubs can decrease the likelihood of substance use, continued research is needed to better identify users, causes for risk and preventative factors, short and long term ramifications, and the theoretical correlations of use.
Show less - Date Issued
- 2016
- Identifier
- CFE0006287, ucf:51607
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006287
- Title
- The Relationship Between Extracurricular STEM Activities and Performance on the Florida Science Assessment.
- Creator
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Fisher, Karin, Marino, Matthew, Dieker, Lisa, Hines, Rebecca, Basham, James, University of Central Florida
- Abstract / Description
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Students with disabilities perform below their non-disabled peers in science (National Center for Educational Statistics [NCES], 2011; National Educational Longitudinal Study [NELS], 1998; National Science Foundation [NSF], 2013). The achievement gap is a problem because the nation's competitiveness depends on individuals with science, technology, engineering, and mathematics (STEM) knowledge, skills, and abilities to drive innovation that will lead to new products and economic growth ...
Show moreStudents with disabilities perform below their non-disabled peers in science (National Center for Educational Statistics [NCES], 2011; National Educational Longitudinal Study [NELS], 1998; National Science Foundation [NSF], 2013). The achievement gap is a problem because the nation's competitiveness depends on individuals with science, technology, engineering, and mathematics (STEM) knowledge, skills, and abilities to drive innovation that will lead to new products and economic growth (Business-Higher Education Forum [BHEF]/Act Policy Brief, 2014; National Academies of Sciences, Engineering, and Medicine, 2016; National Science Board, 2015). If Florida is to continue to grow and prosper, all students, including students with disabilities must be prepared for the economy they will inherit. The purpose of the current study was to determine if informal science learning activities offered in Florida school districts impact students with disabilities (SWD) performance on the 8th Grade Florida science assessment.The researcher posed four research questions. The first research question determined whether a statistically significant difference existed between students with disabilities and their non-disabled peers on the 8th Grade Florida Science Assessment. The researcher found a statistically significant difference of students without disabilities outperforming their peers with disabilities. The second and third research questions were analyzed using survey responses from STEM personnel in each Florida district. The questions evaluated the percentage of SWD who participate in STEM activities. Findings indicated most districts do not track the number of SWD who participate in STEM activities. The third research question determined the type of SWD who participated in STEM activities. The largest category represented in STEM activities was students with learning disabilities. The last research question asked if there was a correlation between the number of STEM activities offered in a district and the results of the 8th Grade Statewide Science Assessment for SWD. Results indicated a small positive correlation. The researcher identified areas for future research, as well as recommendations and implications of the results from the study.
Show less - Date Issued
- 2016
- Identifier
- CFE0006299, ucf:51594
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006299
- Title
- Exploring the Hows and the Whos: The Effects of Self-Regulation Prompting and Goal Orientation on the e-Learning Process.
- Creator
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Benishek, Lauren, Salas, Eduardo, Joseph, Dana, Jentsch, Florian, Burke, Shawn, University of Central Florida
- Abstract / Description
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This study investigated the effects that self-regulation prompts and goal orientation may exhibit on self-regulatory processes and subsequent learning. Specifically, a moderated mediation model was developed to explain how self-regulation prompts interact with prove performance goal orientation to affect two mediational processes, time on task and self-regulatory activity, and ultimately impact learning within a learner-controlled e-learning environment. To assess these hypotheses, an online...
Show moreThis study investigated the effects that self-regulation prompts and goal orientation may exhibit on self-regulatory processes and subsequent learning. Specifically, a moderated mediation model was developed to explain how self-regulation prompts interact with prove performance goal orientation to affect two mediational processes, time on task and self-regulatory activity, and ultimately impact learning within a learner-controlled e-learning environment. To assess these hypotheses, an online Microsoft Excel instructional program was developed wherein 197 participants had control over when and where they completed training, the content they reviewed, the delivery medium (text-based or video-based), and the sequencing and pace at which they progressed through training. Participants in the experimental condition were periodically asked questions (i.e., self-regulation prompts) designed to encourage self-assessment of learning progress and strategies. All participants completed questionnaires before and after training. Findings did not support the hypothesized model. Implications and limitations as well as recommendations for future research will be discussed.
Show less - Date Issued
- 2014
- Identifier
- CFE0005463, ucf:50382
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005463
- Title
- Faculty Perspectives and Participation in Implementing an Early Alert System and Intervention in a Community College.
- Creator
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Bentham, Claudine, King, Kathy (Kathleen), Cox, Dr. Thomas, Hopp, Carolyn, Bosley, Michael, University of Central Florida
- Abstract / Description
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Early alert systems have been recognized as a high impact practice designed to improve student engagement and student success. Early alert is designed to identify students with at-risk behaviors early in the semester before they decide to drop-out, withdraw, or fail their classes, using resources such as a predictive analysis tool or advising. For an early alert to be successful and efficient, faculty should be included in the process of early alert. This qualitative study examined faculty's...
Show moreEarly alert systems have been recognized as a high impact practice designed to improve student engagement and student success. Early alert is designed to identify students with at-risk behaviors early in the semester before they decide to drop-out, withdraw, or fail their classes, using resources such as a predictive analysis tool or advising. For an early alert to be successful and efficient, faculty should be included in the process of early alert. This qualitative study examined faculty's perspective and experiences when implementing early alert strategies and intervention in a two-year institution. Using Cranton's seven facets of transformative learning as a conceptual framework, this study examined the changes, perception, and experiences of faculty as a result of implementation. The literature reviews best practices that can be considered when faculty designs their early alert strategies and intervention. Participants shared their During and After Implementation Journal experience by completing reflection journals. After careful analysis of their journals and initial interview, the following major themes emerged: a) at-risk behaviors, b) high-impact practices, c) intentionality, d) personal connection, e) perspective transformation, and f) value. As a result of these themes, recommendations were provided to assist faculty development and change agents in two-year institutions in improving early alert methods to increase student success.
Show less - Date Issued
- 2017
- Identifier
- CFE0006857, ucf:51742
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006857
- Title
- RELATIONSHIP BETWEEN ADOLESCENT BEHAVIOR AND CIVIC ENGAGEMENT.
- Creator
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Ernst, Michael, Murray, Barbara, University of Central Florida
- Abstract / Description
-
Citizenship – commitment to and participation in a political community - is the heart of constitutional democracy and a free society. Knowledge of the rights, responsibilities, and privileges are the electrical impulses that keep a steady beat. Without the participation of educated citizens, a democratic republic can not and does not function. This study analyzed the relationship between adolescent behavior and civic engagement. This task was accomplished by examining the amount of civic...
Show moreCitizenship – commitment to and participation in a political community - is the heart of constitutional democracy and a free society. Knowledge of the rights, responsibilities, and privileges are the electrical impulses that keep a steady beat. Without the participation of educated citizens, a democratic republic can not and does not function. This study analyzed the relationship between adolescent behavior and civic engagement. This task was accomplished by examining the amount of civic knowledge possessed by two groups within a population. The population examined, a high school in Flagler County, was composed of "at risk" students (those who had an Individualized Education Plan) and "regular" students (those that did not). The study uncovered the message that the amount of civic knowledge possessed by American youth was not as important as it was for them to be engaged in extracurricular activities. During the course of time, educators appear to have restricted their own ability to plan for and provide learning experiences that take in to consideration the physical characteristics; physical needs; patterns of growth and maturation; physiological changes; intellectual development; intellectual characteristics; learning preferences and styles; emotional development; personality development; and social development of each and every young adolescent attending school. When interesting, affordable activities are not made available, students become bored and get in to trouble during after school hours. Adolescent behaviors such as moral judgment and risk taking (or lack thereof) affect their decision to become civically involved.
Show less - Date Issued
- 2005
- Identifier
- CFE0000764, ucf:46585
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000764
- Title
- Data-Driven Simulation Modeling of Construction and Infrastructure Operations Using Process Knowledge Discovery.
- Creator
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Akhavian, Reza, Behzadan, Amir, Oloufa, Amr, Yun, Hae-Bum, Sukthankar, Gita, Zheng, Qipeng, University of Central Florida
- Abstract / Description
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Within the architecture, engineering, and construction (AEC) domain, simulation modeling is mainly used to facilitate decision-making by enabling the assessment of different operational plans and resource arrangements, that are otherwise difficult (if not impossible), expensive, or time consuming to be evaluated in real world settings. The accuracy of such models directly affects their reliability to serve as a basis for important decisions such as project completion time estimation and...
Show moreWithin the architecture, engineering, and construction (AEC) domain, simulation modeling is mainly used to facilitate decision-making by enabling the assessment of different operational plans and resource arrangements, that are otherwise difficult (if not impossible), expensive, or time consuming to be evaluated in real world settings. The accuracy of such models directly affects their reliability to serve as a basis for important decisions such as project completion time estimation and resource allocation. Compared to other industries, this is particularly important in construction and infrastructure projects due to the high resource costs and the societal impacts of these projects. Discrete event simulation (DES) is a decision making tool that can benefit the process of design, control, and management of construction operations. Despite recent advancements, most DES models used in construction are created during the early planning and design stage when the lack of factual information from the project prohibits the use of realistic data in simulation modeling. The resulting models, therefore, are often built using rigid (subjective) assumptions and design parameters (e.g. precedence logic, activity durations). In all such cases and in the absence of an inclusive methodology to incorporate real field data as the project evolves, modelers rely on information from previous projects (a.k.a. secondary data), expert judgments, and subjective assumptions to generate simulations to predict future performance. These and similar shortcomings have to a large extent limited the use of traditional DES tools to preliminary studies and long-term planning of construction projects.In the realm of the business process management, process mining as a relatively new research domain seeks to automatically discover a process model by observing activity records and extracting information about processes. The research presented in this Ph.D. Dissertation was in part inspired by the prospect of construction process mining using sensory data collected from field agents. This enabled the extraction of operational knowledge necessary to generate and maintain the fidelity of simulation models. A preliminary study was conducted to demonstrate the feasibility and applicability of data-driven knowledge-based simulation modeling with focus on data collection using wireless sensor network (WSN) and rule-based taxonomy of activities. The resulting knowledge-based simulation models performed very well in properly predicting key performance measures of real construction systems. Next, a pervasive mobile data collection and mining technique was adopted and an activity recognition framework for construction equipment and worker tasks was developed. Data was collected using smartphone accelerometers and gyroscopes from construction entities to generate significant statistical time- and frequency-domain features. The extracted features served as the input of different types of machine learning algorithms that were applied to various construction activities. The trained predictive algorithms were then used to extract activity durations and calculate probability distributions to be fused into corresponding DES models. Results indicated that the generated data-driven knowledge-based simulation models outperform static models created based upon engineering assumptions and estimations with regard to compatibility of performance measure outputs to reality.
Show less - Date Issued
- 2015
- Identifier
- CFE0006023, ucf:51014
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006023
