Current Search: activism (x)
Pages
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Title
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How Millennials Engage in Social Media Activism: A Uses and Gratifications Approach.
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Creator
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Dookhoo, Sasha, Dodd, Melissa, Rubenking, Bridget, Brown, Tim, University of Central Florida
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Abstract / Description
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Millennials are the world's digital natives and its largest generation. A general perception of this generation is that they lack engagement in social-political issues. This study explores how Millennials are engaging in social media activism and whether online activism is driving offline activism behaviors. A quantitative survey of 306 participants was conducted to learn more about the gratifications Millennials obtain through social media and whether associations exist between their online...
Show moreMillennials are the world's digital natives and its largest generation. A general perception of this generation is that they lack engagement in social-political issues. This study explores how Millennials are engaging in social media activism and whether online activism is driving offline activism behaviors. A quantitative survey of 306 participants was conducted to learn more about the gratifications Millennials obtain through social media and whether associations exist between their online and offline activism behaviors. The results showed that Millennials engage in online activism behaviors to a greater extent than offline activism behaviors. Millennials primarily gratify intrinsic needs for interaction and belonging by engaging in social media activism behaviors. So-called (")slacktivism(") behaviors were most common among Millennials engaging in online activism. Similarly, online activism behaviors that require greater investment from Millennials were a good predictor of activism behaviors that occur offline. Results also demonstrate that, at an individual identification level, Millennials self-perceptions as activists predicted engagement in both online and offline activism.
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Date Issued
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2015
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Identifier
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CFE0005941, ucf:50794
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0005941
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Title
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RECOGNIZING TEAMWORK ACTIVITY IN OBSERVATIONS OF EMBODIED AGENTS.
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Creator
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Luotsinen, Linus, Boloni, Lotzi, University of Central Florida
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Abstract / Description
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This thesis presents contributions to the theory and practice of team activity recognition. A particular focus of our work was to improve our ability to collect and label representative samples, thus making the team activity recognition more efficient. A second focus of our work is improving the robustness of the recognition process in the presence of noisy and distorted data. The main contributions of this thesis are as follows: We developed a software tool, the Teamwork Scenario Editor (TSE...
Show moreThis thesis presents contributions to the theory and practice of team activity recognition. A particular focus of our work was to improve our ability to collect and label representative samples, thus making the team activity recognition more efficient. A second focus of our work is improving the robustness of the recognition process in the presence of noisy and distorted data. The main contributions of this thesis are as follows: We developed a software tool, the Teamwork Scenario Editor (TSE), for the acquisition, segmentation and labeling of teamwork data. Using the TSE we acquired a corpus of labeled team actions both from synthetic and real world sources. We developed an approach through which representations of idealized team actions can be acquired in form of Hidden Markov Models which are trained using a small set of representative examples segmented and labeled with the TSE. We developed set of team-oriented feature functions, which extract discrete features from the high-dimensional continuous data. The features were chosen such that they mimic the features used by humans when recognizing teamwork actions. We developed a technique to recognize the likely roles played by agents in teams even before the team action was recognized. Through experimental studies we show that the feature functions and role recognition module significantly increase the recognition accuracy, while allowing arbitrary shuffled inputs and noisy data.
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Date Issued
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2007
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Identifier
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CFE0001876, ucf:47409
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0001876
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Title
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Labor's stake in Peace.
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Creator
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American Friends Service Committee
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Date Issued
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1960
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Identifier
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1927058, CFDT1927058, ucf:4811
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/FCLA/DT/1927058
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Title
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The world's trade union movement.
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Creator
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Lozovskiĭ, A., Browder, Earl R., Skromny, M. A.
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Date Issued
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1924
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Identifier
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2072175, CFDT2072175, ucf:4887
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/FCLA/DT/2072175
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Title
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Active Learning with Unreliable Annotations.
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Creator
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Zhao, Liyue, Sukthankar, Gita, Tappen, Marshall, Georgiopoulos, Michael, Sukthankar, Rahul, University of Central Florida
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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.
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Date Issued
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2013
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Identifier
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CFE0004965, ucf:49579
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0004965
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Title
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The student protest movement a recapitulation.
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Creator
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Boynton, G. R. (George Robert)
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Date Issued
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1961
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Identifier
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2700030, CFDT2700030, ucf:5154
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/FCLA/DT/2700030
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Title
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DESIGN OF SEA WATER HEAT EXCHANGERFOR MINIATURE VAPOR COMPRESSION CYCLE.
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Creator
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Hughes, James, Chow, Louis, University of Central Florida
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Abstract / Description
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Recent advances in the development of miniature vapor compression cycle components have created unique opportunities for heating and cooling applications, specifically to human physiological requirements that arise in extreme environments. Diving in very cold water between 1.7 and 5°C requires active heating because passive thermal insulation has proven inadequate for long durations. To maintain diver mobility and cognitive performance, it is desirable to provide 250 to 300 W of heat from...
Show moreRecent advances in the development of miniature vapor compression cycle components have created unique opportunities for heating and cooling applications, specifically to human physiological requirements that arise in extreme environments. Diving in very cold water between 1.7 and 5°C requires active heating because passive thermal insulation has proven inadequate for long durations. To maintain diver mobility and cognitive performance, it is desirable to provide 250 to 300 W of heat from an un-tethered power source. The use of a miniature vapor compression cycle reduces the amount of power (batteries or fuel cell) that the diver must carry by 2.5 times over a standard resistive heater. This study develops the compact evaporator used to extract heat from the sea water to provide heat to the diver. The performance is calculated through the application of traditional single-phase and two-phase heat transfer correlations using numerical methods. Fabrication methods were investigated and then a prototype was manufactured. A test stand was developed to fully characterize the evaporator at various conditions. The evaporator is then evaluated for the conditions of interest. Test results suggest the correlations applied over predict performance up to 20%. The evaporator tested meets the performance specifications and design criteria and is ready for system integration.
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Date Issued
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2009
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Identifier
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CFE0002917, ucf:48016
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0002917
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Title
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Diverse 3rd Grade Non-School Activity Participation: Associations With Social Competence and Reading Performance.
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Creator
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Mahone, Robert, Hoffman, Bobby, Crevecoeur, Edwidge, Biraimah, Karen, Bai, Haiyan, University of Central Florida
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Abstract / Description
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This study examined indicators of 3rd Grade students' non-school activity participation (NSAP) for associations with measures of social competence and reading performance. The Early Childhood Longitudinal Study (ECLS-K), representative of a 1999 kindergarten cohort of more than 14,000 students was used. The study constructed social competence composites from responses provided by students, parents and teachers. Principal component analysis and iterative bivariate correlations were utilized to...
Show moreThis study examined indicators of 3rd Grade students' non-school activity participation (NSAP) for associations with measures of social competence and reading performance. The Early Childhood Longitudinal Study (ECLS-K), representative of a 1999 kindergarten cohort of more than 14,000 students was used. The study constructed social competence composites from responses provided by students, parents and teachers. Principal component analysis and iterative bivariate correlations were utilized to derive the most robust composite for use in tests of the main hypotheses of the study. Results confirmed prior research findings that social competence has strong positive associations with academic performance. Thereafter, the social competence composite and ECLS Reading IRT Scale Score were used as alternative outcome measures in the bivariate analyses and linear regressions on non-school activity participation (NSAP) and breadth of non-school activity participation (BNSAP) scores.Cluster and multiple regression analyses combined in the study and brought demographic and cognitive controls to bear on iterations of five distinct views of the independent variables. Results indicated that girls influenced the association strengths observed for NSAP, and boys seemed to drive the direction and strength of BNSAP associations. Although regression betas for total samples were nominal, when viewed by demographic cluster samples the values were appreciatively improved. The use of the cluster distinctions provided views of significant associations that were otherwise dissolved into nominal aggregates. The results of these analyses support the construct validity of applying the aggregate scoring metric of EAP research to NSAP. Regression results prompted a call for future inquiries into student self-selection.
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Date Issued
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2011
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Identifier
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CFE0004132, ucf:49123
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0004132
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Title
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IDEOLOGICAL VOTING ON THE SUPREME COURT: AN ANALYSIS OF JUDICIAL ACTIVISM ON THE BURGER AND REHNQUIST COURTS, 1969-2004.
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Creator
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Larsen, Tiahna, Lanier, Drew, University of Central Florida
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Abstract / Description
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The influence of ideology and attitudes on the decision-making process of Supreme Court justices has been well documented, such that the attitudinal model has emerged as the dominant paradigm for understanding judicial behavior. When ideology and personal preferences seem to eclipse legal factors, such as adherence to precedent and deference to the democratically-elected branches, outcries of ÃÂ"judicial activismÃÂ" have occurred. Previous studies ...
Show moreThe influence of ideology and attitudes on the decision-making process of Supreme Court justices has been well documented, such that the attitudinal model has emerged as the dominant paradigm for understanding judicial behavior. When ideology and personal preferences seem to eclipse legal factors, such as adherence to precedent and deference to the democratically-elected branches, outcries of ÃÂ"judicial activismÃÂ" have occurred. Previous studies (Lindquist and Cross 2009) have operationalized judicial activism and have provided measures for studying behavior that may be considered activist (as opposed to restrainist), further supporting the premise that ideology trumps other extra-attitudinal and legal factors in the judicial decision-making process. While the attitudinal model indicates that ideology is the strongest predictor of judicial decision-making, this research will include a number of legal variables that have significantly influenced justicesÃÂ' votes. As previous studies have demonstrated, an integrated model that combines a number of critical variables can have more explanatory power than one that relies on attitudinal reasons alone (Banks 1999; Hurwitz and Stefko 2004; Mishler and Sheehan 1996). As such, the purpose of this research is to examine individual level decision-making of the most ideological justices on the Burger and Rehnquist Courts (1969-2004) in regards to their activist behavior to overrule legal precedents and invalidate federal statutes. This research will employ multivariate regression analysis to assess the effects of attitudinal, legal and extra-attitudinal factors in the judicial decision-making process.
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Date Issued
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2010
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Identifier
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CFE0003287, ucf:48531
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0003287
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Title
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The Impact of Judo on Aggressive Behaviors in Youth with Autism Spectrum Disorder.
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Creator
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Rivera, Paola, Garcia, Jeanette, Fukuda, David, Stout, Jeffrey, University of Central Florida
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Abstract / Description
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The aim of this study was to examine the effects of an 8-week judo program on lifestyle habits and behavior in children with Autism Spectrum Disorder (ASD). METHODS: Participants included 25 children (ages 8-17), with a formal diagnosis of ASD. The sample participated in an 8-week judo program (45 minutes, 1x week), with measures taken at baseline and at the end of the 8-weeks. In order to assess activity levels and sleep quality, participants were instructed to wear Actigraph GT9X...
Show moreThe aim of this study was to examine the effects of an 8-week judo program on lifestyle habits and behavior in children with Autism Spectrum Disorder (ASD). METHODS: Participants included 25 children (ages 8-17), with a formal diagnosis of ASD. The sample participated in an 8-week judo program (45 minutes, 1x week), with measures taken at baseline and at the end of the 8-weeks. In order to assess activity levels and sleep quality, participants were instructed to wear Actigraph GT9X Accelerometers for 7 days and nights. In order to assess behavioral changes, parents were given the ABC survey to fill out at baseline and post-intervention. Non-parametric paired t-tests were conducted to compare differences in behaviors, MVPA, SB, and sleep quality (i.e. sleep efficiency, total sleep time, number of awakenings, and wake after sleep onset) pre and post judo. RESULTS: Results indicated there was a strong negative correlation (r= -0.632) with inappropriate behaviors and the number of classes attended. Participants also spent a significantly greater percentage of time in daily MVPA (8% vs 4%, p=0.05) following the program. There was a significant increase in total minutes of sleep duration (572.56 vs 333.8, p=0.008) following the program, and although not statistically significant, a trend existed for improved sleep efficiency (92% vs 88%, p=0.1). CONCLUSION: Despite no significant differences in ABC scores pre and post-judo, a strong association between class attendance and lower ABC scores were observed, along with improvements in MVPA and sleep quality. Future studies should include larger samples of youth with ASD, over a longer intervention period.
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Date Issued
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2019
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Identifier
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CFE0007525, ucf:52591
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0007525
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Title
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Do Changes in Muscle Architecture Effect Post- Activation Potentiation.
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Creator
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Reardon, Danielle, Hoffman, Jay, Fragala, Maren, Stout, Jeffrey, Fukuda, David, University of Central Florida
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Abstract / Description
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Purpose: To examine the effect of three muscle potentiation protocols on changes in muscle architecture and the subsequent effect on jump power performance. Methods: Maximal (1RM) squat strength (Mean SD=178.3 (&)#177; 36.6kg), vertical jump power, and muscle architecture were obtained in 12 resistance trained men (25.2(&)#177;3.6y; 90.67(&)#177;12.7kg). Participants randomly completed three squatting protocols at 75% (3 x 10 reps), 90% (3 x 3 reps) or 100% (1 x 1) of their 1RM, or no workout...
Show morePurpose: To examine the effect of three muscle potentiation protocols on changes in muscle architecture and the subsequent effect on jump power performance. Methods: Maximal (1RM) squat strength (Mean SD=178.3 (&)#177; 36.6kg), vertical jump power, and muscle architecture were obtained in 12 resistance trained men (25.2(&)#177;3.6y; 90.67(&)#177;12.7kg). Participants randomly completed three squatting protocols at 75% (3 x 10 reps), 90% (3 x 3 reps) or 100% (1 x 1) of their 1RM, or no workout (CON), with each protocol being separated by one week. During each testing session ultrasound and vertical jump testing were assessed at baseline (BL), 8min post (8P) and 20min post (20P) workout. Ultrasound measures of the rectus femoris (RF) and vastus lateralis (VL) muscles included; cross sectional area (CSA) and pennation angle (PNG). Following each ultrasound, peak (PVJP) and mean (MVJP) vertical jump power (using hands for maximum jump height) were measured using an accelerometer. Results: Magnitude based inferences analysis indicated that in comparison to CON, 75% resulted in a likely greater change in RF-CSA and VL-CSA (BL-8P and BL(-)20P), 90% resulted in a likely greater RF-CSA and VL-CSA (BL(-)20P), and 100% resulted in a very likely or likely decrease in VL-PNG at BL-8P and BL(-)20P, respectively). Meanwhile, changes in PVJP and MVJP for the 75% trial was likely decreased at BL-8P and BL(-)20P; and for the 90% trial MVJP was likely decreased at BL-8P and BL(-)20P. Analysis of the magnitude of the relationships indicated a likely negative relationship between VL-PNG and MVJP (r = -0.35; p (<) 0.018) at BL-8P, while at BL(-)20P, a negative relationship was observed between PVJP and RF-CSA (r = -0.37; p (<) 0.014). Conclusion: Acute increases in muscle size and acute decreases in pennation angle did not result in any potentiation in vertical jump power measures. Although the inverse relationships observed between muscle architecture variables and power suggests a potential effect, the change in position (i.e. movement from standing to supine for ultrasound measures) may negate, as a result of potential fluid shifts or muscle relaxation, the potentiating effects of the exercise. It is also possible that the fatiguing nature of the squat protocols in trained but not competitive participants may have also contributed to the results.
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Date Issued
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2013
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Identifier
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CFE0005048, ucf:49963
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0005048
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Title
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German Fascism and the workers.
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Creator
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Berlin, Leo
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Date Issued
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1933
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Identifier
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363263, CFDT363263, ucf:5288
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/FCLA/DT/363263
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Title
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SHORT TERM EXAMINATION OF PHYSICAL ACTIVITY AND SLEEP QUALITY WITH CHILDREN WITH AUTISM SPECTRUM DISORDER.
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Creator
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Barnes, Demani Barak, Garcia, Jeanette M., Fukuda, David H., University of Central Florida
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Abstract / Description
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Children diagnosed with Autism Spectrum Disorder (ASD) may not be meeting the recommended amounts of physical activity (PA) or obtain a sufficient amount of sleep, however, few studies have objectively compared PA, sedentary behavior, and sleep quality between typically developing (TD) youth, and youth with ASD. Therefore, the purpose of this study was to compare levels of PA, sedentary behavior, and sleep quality between youth with ASD and TD youth. Twenty-three children with ASD and 12 TD...
Show moreChildren diagnosed with Autism Spectrum Disorder (ASD) may not be meeting the recommended amounts of physical activity (PA) or obtain a sufficient amount of sleep, however, few studies have objectively compared PA, sedentary behavior, and sleep quality between typically developing (TD) youth, and youth with ASD. Therefore, the purpose of this study was to compare levels of PA, sedentary behavior, and sleep quality between youth with ASD and TD youth. Twenty-three children with ASD and 12 TD children wore the Actigraph GT9X accelerometer over seven days and nights to assess activity and sleep. Youth with ASD had significantly greater levels of sedentary behavior (p=.02), and had less sleep efficiency compared to TD youth (p=.0001). Additionally, TD youth were more likely to achieve the recommended levels of PA compared to youth with ASD (p=.003). Results suggest that youth with ASD have poorer health habits compared to TD youth. Interventions should be developed to target health behaviors in youth with ASD.
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Date Issued
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2019
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Identifier
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CFH2000490, ucf:45830
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFH2000490
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Title
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HOW DISGUST, PHYSIOLOGICAL ACTIVITY AND MORAL FOUNDATIONS MAY PREDICT POLITICAL ATTITUDES AND RELIGIOUS BELIEFS: A SYSTEMATIC REVIEW.
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Creator
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Mannion, Kayla M, Modianos, Doan, University of Central Florida
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Abstract / Description
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The goal of this research synthesis is to obtain evidence about a new and upcoming idea of how political ideology and religious beliefs may be predicted by disgust, moral codes and physiological activity. Previously, it was believed by some that politics and religion were a product of an individual's environment and influences of an individual's family and friend's beliefs. Current research is trying to explain how much a person's biology influences their beliefs. This thesis will aim to...
Show moreThe goal of this research synthesis is to obtain evidence about a new and upcoming idea of how political ideology and religious beliefs may be predicted by disgust, moral codes and physiological activity. Previously, it was believed by some that politics and religion were a product of an individual's environment and influences of an individual's family and friend's beliefs. Current research is trying to explain how much a person's biology influences their beliefs. This thesis will aim to explain how it is possible to obtain these types of data and why this research is important.
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Date Issued
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2017
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Identifier
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CFH2000184, ucf:45970
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFH2000184
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Title
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EFFECTS OF INTEGRATING WRITING ACTIVITIES ON STUDENTS' ATTITUDES AND ACHIEVEMENT IN PROBLEM SOLVING: AN ACTION RESEARCH STUDY.
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Creator
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Culbert, Kelly, Ortiz, Enrique, University of Central Florida
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Abstract / Description
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This action research study investigated my practice of using writing activities in the mathematics classroom. The study was conducted to determine the effect of integrating writing with mathematics on students' achievement in, and attitudes towards problem solving, and the relationship between students' attitudes and their achievement in problem solving. The study was conducted over a six-week period. Students participated in daily problem solving activities. Data were collected using a...
Show moreThis action research study investigated my practice of using writing activities in the mathematics classroom. The study was conducted to determine the effect of integrating writing with mathematics on students' achievement in, and attitudes towards problem solving, and the relationship between students' attitudes and their achievement in problem solving. The study was conducted over a six-week period. Students participated in daily problem solving activities. Data were collected using a problem solving themed writing rubric for evaluating student journal responses, anecdotal records, and using a pre- and posttest problem solving attitude inventory. In this study, students demonstrated overall increased mathematical knowledge, strategic knowledge, and abilities to explain their procedures. In addition, all three data-collection instruments demonstrated students' positive attitudes toward problem solving. Moreover, evaluation of the data sources illustrated a relationship between students' performance and attitudes. The study suggested that writing about mathematics is beneficial to students' achievement and attitudes toward problem solving.
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Date Issued
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2005
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Identifier
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CFE0000435, ucf:46392
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0000435
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Title
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PROFESSIONAL DEVELOPMENT ACTIVITIES AND JOB SATISFACTION AMONG COMMUNITY COLLEGE ADJUNCT FACULTY.
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Creator
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Bosley, Michael, Kysilka, Marcella, University of Central Florida
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Abstract / Description
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This study was designed to examine the relationship between participation in specific professional development activities and the adjuncts' level of job satisfaction. Data was gathered from previous and current professional development activities at Valencia Community College in Orlando, Florida. Research in the area of professional development activities for adjunct faculty is emerging; however, there is a scarcity of research in the area of professional development activities as a means to...
Show moreThis study was designed to examine the relationship between participation in specific professional development activities and the adjuncts' level of job satisfaction. Data was gathered from previous and current professional development activities at Valencia Community College in Orlando, Florida. Research in the area of professional development activities for adjunct faculty is emerging; however, there is a scarcity of research in the area of professional development activities as a means to increase job satisfaction. The data produced by this study were reviewed to determine, the level of job satisfaction of those adjuncts who attended professional development activities; the degree to which adjunct faculty members attended professional development activities; the reasons why adjuncts attended professional development activities; and how attendance at professional development activities has enhanced adjuncts' teaching performance. Findings showed that adjuncts who attended professional development activities at Valencia Community College were generally satisfied with their jobs. Adjuncts were also satisfied with the professional development activities they attended and many attended more than one activity.
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Date Issued
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2004
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Identifier
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CFE0000241, ucf:46319
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0000241
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Title
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EFFECTS OF REDUCED RAS AND VOLUME ON ANAEROBIC ZONE PERFORMANCE FOR A SEPTIC WASTEWATER BIOLOGICAL PHOSPHOROUS REMOVAL SYSTEM.
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Creator
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Magro, Daniel, Randall, Andrew, University of Central Florida
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Abstract / Description
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Enhanced Biological Phosphorous Removal (EBPR) performance was found to be adequate with reduced Return Activated Sludge (RAS) flows (50% of available RAS) to the anaerobic tank and smaller than typical anaerobic zone volume (1.08 hours hydraulic retention time or HRT). Three identical parallel biological nutrient removal (BNR) pilot plants were fed with strong, highly fermented (160 mg/L VFAs), domestic/industrial wastewater from a full scale wastewater treatment facility (WWTF). The pilot...
Show moreEnhanced Biological Phosphorous Removal (EBPR) performance was found to be adequate with reduced Return Activated Sludge (RAS) flows (50% of available RAS) to the anaerobic tank and smaller than typical anaerobic zone volume (1.08 hours hydraulic retention time or HRT). Three identical parallel biological nutrient removal (BNR) pilot plants were fed with strong, highly fermented (160 mg/L VFAs), domestic/industrial wastewater from a full scale wastewater treatment facility (WWTF). The pilot plants were operated at 100%, 50%, 40% and 25% RAS (percent of available RAS) flows to the anaerobic tank with the remaining RAS to the anoxic tank. In addition, varying anaerobic HRT (1.08 and 1.5 hours), and increased hydraulic loading (35% increase) was examined. The study was divided in four Phases, and the effect of these process variations on EBPR were studied by having one different variable between two identical systems. The most significant conclusions were that only bringing part of the RAS to the anaerobic zone did not decrease EBPR performance, instead changing the location of P release and uptake. Bringing less RAS to the anaerobic and more to the anoxic tank decreased anaerobic P release and increased anoxic P release (or decreased anoxic P uptake). Equally important is that with VFA rich influent wastewater, excessive anaerobic volume was shown to hurt overall P removal even when it resulted in increased anaerobic P release. Computer modeling with BioWin and UCTPHO was found to predict similar results to the pilot test results. Modeling was done with reduced RAS flows to the anaerobic zone (100%, 50%, and 25% RAS), increased anaerobic volume, and increased hydraulic loading. The most significant conclusions were that both models predicted EBPR did not deteriorate with less RAS to the anaerobic zone, in fact, improvements in EBPR were observed. Additional scenarios were also consistent with pilot test data in that increased anaerobic volume did not improve EBPR and increased hydraulic loading did not adversely affect EBPR.
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Date Issued
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2005
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Identifier
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CFE0000329, ucf:46285
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0000329
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Title
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FEAR OF CRIME AND PERCEIVED RISK OF VICTIMIZATION AMONG COLLEGE STUDENTS.
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Creator
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Truman, Jennifer, Jasinski, Jana, University of Central Florida
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Abstract / Description
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Fear of crime is argued to be a social problem that may lead to restriction of activities, increased security costs, and avoidance behaviors. Findings from research indicate that there are many demographic influences on the fear of crime. Specifically, gender has been found to be one of the most consistent predictors of crime, that is, females significantly fear crime more than males. Additionally, research suggests that a person's fear of crime or perceived risk to crime may increase...
Show moreFear of crime is argued to be a social problem that may lead to restriction of activities, increased security costs, and avoidance behaviors. Findings from research indicate that there are many demographic influences on the fear of crime. Specifically, gender has been found to be one of the most consistent predictors of crime, that is, females significantly fear crime more than males. Additionally, research suggests that a person's fear of crime or perceived risk to crime may increase their engagement in precautionary behaviors, such as carrying a weapon for protection. The current study examined these relationships using data collected from 588 students at the University of Central Florida in the fall of 2006. The results indicated that females reported significantly higher mean scores on the fear scale for all crimes except property crimes, as well as higher mean scores for most crimes on the perceived risk of victimization scale. Females also reported feeling less safe from crime in their neighborhood and at home. Furthermore, females were more likely to engage in precautionary behaviors, but less likely to engage in risky behaviors. Fear of crime was not a significant predictor of the use of precautionary behaviors. However, respondents with greater perceived risk were more likely to use a greater number of precautionary behaviors. Additionally, respondents who had a perceived lack of safety were more likely to use precautionary behaviors and engage in them more often. Risky lifestyle behaviors were not significant predictors of either fear or guardianship activities. Exposure to the media was only shown to increase fear, perceived risk, and perceived lack of safety at the bivariate level. And finally previous victimization was not a significant predictor of fear or perceived risk. Overall, the results were fairly consistent with previous literature. Implications for future research and policy are discussed.
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Date Issued
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2007
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Identifier
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CFE0001622, ucf:47185
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0001622
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Title
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HABITAT USE AND SEASONAL ACTIVITY OF SELECTED SNAKES ON JOHN F. KENNEDY SPACE CENTER, FLORIDA.
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Creator
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Dyer, Karen, Stout, I. Jack, University of Central Florida
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Abstract / Description
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An intensive, replicated monthly sampling of snake communities inhabiting four habitat types was conducted at John F. Kennedy Space Center, Brevard County, Florida from November 2002 through October 2003. Thirteen species (580 individuals plus 74 recaptures) plus one hybrid were captured. The three most commonly captured species, Coluber constrictor, Thamnophis sirtalis, and Thamnophis sauritus, combined made up 85% of the sample. These three species were active during every month of the year...
Show moreAn intensive, replicated monthly sampling of snake communities inhabiting four habitat types was conducted at John F. Kennedy Space Center, Brevard County, Florida from November 2002 through October 2003. Thirteen species (580 individuals plus 74 recaptures) plus one hybrid were captured. The three most commonly captured species, Coluber constrictor, Thamnophis sirtalis, and Thamnophis sauritus, combined made up 85% of the sample. These three species were active during every month of the year, but showed modal activity patterns typical of Temperate Zone snakes. Monthly snake captures were correlated with monthly captures of potential prey species and with mean monthly temperature. Species richness in the four habitat types varied from nine to 12. Drift fences in ruderal habitats had the highest species richness, while fences in swales captured the greatest number of individuals. The most dissimilar habitat pair was scrub and swale, while the most similar pair was ruderal and hammock. Box traps proved more effective for targeting the largest snake species, while funnel and box traps were equally effective for targeting other species.
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Date Issued
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2004
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Identifier
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CFE0000237, ucf:46264
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0000237
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Title
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MULTIZOOM ACTIVITY RECOGNITION USING MACHINE LEARNING.
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Creator
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Smith, Raymond, Shah, Mubarak, University of Central Florida
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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.
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Date Issued
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2005
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Identifier
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CFE0000865, ucf:46658
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Format
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Document (PDF)
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PURL
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http://purl.flvc.org/ucf/fd/CFE0000865
Pages