Current Search: evaluation (x)
View All Items
(61 - 79 of 79)
Pages
- Title
- Understanding the beliefs and attitudes of mid-career secondary school teachers toward teacher evaluation and its effect on their professional practice: A mixed method phenomenological study.
- Creator
-
Booth, William, Gill, Michele, Taylor, Rosemarye, Hutchinson, Cynthia, Mullins, Mark, University of Central Florida
- Abstract / Description
-
The purpose of this mixed-method phenomenological study is to understand the beliefs and attitudes that mid-career secondary school teachers have regarding the teacher evaluation process and its effect on their professional practice. Mid-career secondary school teachers (defined as having between 14-21 years of classroom experience) from Bayview Public Schools were selected to participate. A total of 152 mid-career secondary school teachers completed an electronic survey. Additionally, a...
Show moreThe purpose of this mixed-method phenomenological study is to understand the beliefs and attitudes that mid-career secondary school teachers have regarding the teacher evaluation process and its effect on their professional practice. Mid-career secondary school teachers (defined as having between 14-21 years of classroom experience) from Bayview Public Schools were selected to participate. A total of 152 mid-career secondary school teachers completed an electronic survey. Additionally, a total of 9 participants took part in one-on-one semi-structured interviews. The theoretical framework used to guide the study was the theory of planned behavior (TPB) (Ajzen, 1988; 1991) and Bandura's theory of self-efficacy (1977). The quantitative results from the electronic survey were used to augment qualitative data collected from interviews with willing participants.The interviews with study participants were analyzed for emerging themes. In all, a total of nine emerging themes came to light through the analysis of interview data. The data revealed areas of concern regarding the current method of evaluating teachers in Bayview Public Schools. A presentation of the findings with regard to the theoretical framework, literature, and practice were presented. Furthermore, a list of recommendations was provided addressing the specific concerns of participating teachers. In conclusion, recommendations were also made concerning future research that might continue to add to the body of knowledge concerning teacher evaluation.
Show less - Date Issued
- 2015
- Identifier
- CFE0005765, ucf:50077
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005765
- Title
- Evaluation of a secure laptop based testing program in an undergraduate nursing program.
- Creator
-
Tao, Jinyuan, Gunter, Glenda, Robinson, Edward, Vitale, Thomas, Hayes, Grant, University of Central Florida
- Abstract / Description
-
This applied dissertation paper introduced a program evaluation of a secure laptop-based testing (SLBT) program, which was implemented from 2009 to 2014 in an undergraduate nursing program at a private institution in the southeastern region of the United States (US). Computerized testing is an old topic in the educational research field, but the instructor-made, laptop-based secure testing that utilizes learning management systems (LMS) for undergraduate nursing programs is a fairly new topic...
Show moreThis applied dissertation paper introduced a program evaluation of a secure laptop-based testing (SLBT) program, which was implemented from 2009 to 2014 in an undergraduate nursing program at a private institution in the southeastern region of the United States (US). Computerized testing is an old topic in the educational research field, but the instructor-made, laptop-based secure testing that utilizes learning management systems (LMS) for undergraduate nursing programs is a fairly new topic in the US. Traditionally, testing has been administered with paper and pencil in the undergraduate nursing programs in the US for security reasons. Recently, with different robust LMSs, together with availability of affordable laptops, SLBT has become a reality on many campuses. The undergraduate nursing program at the Adventist University of Health Sciences (ADU) began to implement the SLBT program in 2009, which allowed students to use their newly purchased laptops to take secure quizzes and tests in their classrooms. After nearly five years' SLBT program implementation, a formative evaluation was conducted to seek constructive feedback from students, faculty, and technology support personnel to improve the program. Evaluation data show that, overall, students believed the SLBT program help them get hands-on experience of taking exams on the computer and get them prepared for their National Council Licensure Examination for Registered Nurses (NCLEX-RN) which is also computerized. Students, however, had a lot of concerns on laptop glitches and campus wireless network glitches they experienced during testing. Faculty and technology support personnel, on the other hand, were very satisfied with the SLBT program. Another goal of this evaluation study was to determine if students' first-time passing rate of NCLEX-RN has been improved significantly after the implementation of the SLBT program. NCLEX-RN first-time passing rate data were analyzed using the Chi-Square test and it revealed that there was no significant association between the two types of testing method (paper-and-pencil testing and the secure laptop-based testing) and whether or not students would pass NCLEX-RN the first time X2(1) = 3.53, p (>) .05. Based on the odds ratio, however, the odds of students passed NCLEX-RN the first time were 1.37 times higher if they were taught with the SLBT testing method than if taught with the traditional paper-and-pencil testing method in nursing school.
Show less - Date Issued
- 2014
- Identifier
- CFE0005424, ucf:50421
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005424
- Title
- A Study of The Marzano Teacher Evaluation Model and Student Achievement at 24 Elementary Schools In A Large Suburban School District In Central Florida.
- Creator
-
Flowers, Amy, Murray, Kenneth, Doherty, Walter, Murray, Barbara, Baldwin, Gordon, University of Central Florida
- Abstract / Description
-
The focus of this research was to examine the initial year of implementation of the Marzano Teacher Evaluation Model and iObservation(&)#174; tool (Learning Sciences International, 2012) as it related to student achievement in the School District of Osceola County, Florida and to determine if the Marzano model improved the ability to determine teacher effectiveness with more accuracy than previous models of teacher evaluation used in the school district. Twelve research questions guided this...
Show moreThe focus of this research was to examine the initial year of implementation of the Marzano Teacher Evaluation Model and iObservation(&)#174; tool (Learning Sciences International, 2012) as it related to student achievement in the School District of Osceola County, Florida and to determine if the Marzano model improved the ability to determine teacher effectiveness with more accuracy than previous models of teacher evaluation used in the school district. Twelve research questions guided this study concerning the relationship and predictability between the variables of teacher instructional practice scores, number of observations reported in the iObservation(&)#174; tool, and student achievement in Grades 3-5 using reading and mathematics FCAT 2.0 DSS scores.Linear Regression analysis suggested that for Grade 3 reading and mathematics the instructional practice mean had statistical significance in predicting performance and was a strong predictor of Grade 3 FCAT reading and mathematics performance. Linear Regression analysis suggested that for Grade 3 reading and mathematics the instructional practice mean had statistical significance in predicting performance and was a strong predictor of Grade 3 FCAT reading and mathematics performance. Linear Regression analysis further suggested no statistical significance or predictability for Grades 4, 5 for instructional practice mean and Grades 3,4,5 for observation mean related to FCAT reading and mathematics performance. Caution should be used when attempting to interpret these findings, as this study was based solely on initial year implementation data. Implications for practice are also discussed in this study.
Show less - Date Issued
- 2013
- Identifier
- CFE0004841, ucf:49711
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004841
- Title
- Moving Beyond Title IX: An Evaluation of the Comprehensiveness and Accessibility of Policies and Procedures for Preventing and Responding to Gender Based Violence.
- Creator
-
Mullins, Alyssa, Jasinski, Jana, Mustaine, Elizabeth, Reckdenwald, Amy, University of Central Florida
- Abstract / Description
-
The current study examines the gender based violence policies and programs of large, public universities in Florida. Current literature argues that preventing and responding to gender based violence in institutions of higher education requires comprehensive and ecological techniques at the individual, interpersonal, community, and societal level. In recent years, various institutions and agencies have showed increasing administrative commitment to addressing these issues. Futures Without...
Show moreThe current study examines the gender based violence policies and programs of large, public universities in Florida. Current literature argues that preventing and responding to gender based violence in institutions of higher education requires comprehensive and ecological techniques at the individual, interpersonal, community, and societal level. In recent years, various institutions and agencies have showed increasing administrative commitment to addressing these issues. Futures Without Violence, formerly named Family Violence Prevention Fund, is a private organization that has established a set of guidelines and recommendations to aid IHEs in their response and prevention of gender based violence, intended to exceed federal regulations, such as Title IX and the Jeanne Clery Act. The current study used the guidelines and recommendations established by Futures Without Violence to perform a content analysis of ten large Florida universities' websites to determine the comprehensiveness and accessibility of each university's gender based violence policies and procedures. Findings indicate various levels of compliance within and among the universities. Thus, the current study outlines the generalized findings among all universities, describes the strengths and weaknesses of each university's policies, and provides recommendations for these institutions as well as future exploration of the feasibility of these guidelines and recommendations in practice.
Show less - Date Issued
- 2013
- Identifier
- CFE0004895, ucf:49679
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004895
- Title
- Mothers' Temperament and Personality: Their Roles in Parenting Behaviors, Parent Locus of Control, and the Outcomes of Young Children.
- Creator
-
Puff, Jayme, Renk, Kimberly, Beidel, Deborah, Joseph, Dana, University of Central Florida
- Abstract / Description
-
Many researchers have used the terms 'temperament' and 'personality' interchangeably when describing parents' behavioral styles. Although individual relationships among parents' temperament and personality, parenting behaviors, other parent characteristics, and young children's outcomes have been documented in the literature, parents' temperament and personality have not been examined collectively in conjunction with parenting and child outcome variables. As part of this study, 214 culturally...
Show moreMany researchers have used the terms 'temperament' and 'personality' interchangeably when describing parents' behavioral styles. Although individual relationships among parents' temperament and personality, parenting behaviors, other parent characteristics, and young children's outcomes have been documented in the literature, parents' temperament and personality have not been examined collectively in conjunction with parenting and child outcome variables. As part of this study, 214 culturally diverse mothers with young children who ranged in age from 2- to 6-years rated their own temperament and personality, their parenting characteristics, and their young child's functioning (i.e., temperament and emotional and behavioral functioning). When examining mothers' temperament and personality together, factor analyses revealed a three-factor solution (i.e., General Life Approach, Rhythmicity, and Sticktoitiveness) and suggested that temperament and personality generally were separate but related constructs. Hierarchical and mediation regression analyses suggested the importance of examining both temperament and personality in the context of parenting behaviors and the outcomes experienced by young children. Overall, these findings suggested that mothers' temperament and personality play a significant role in parenting young children and optimizing young child outcomes. These findings are particularly helpful for professionals working with families experiencing difficulties dealing with their young child's difficult temperament styles as well as difficult emotional and behavioral functioning.
Show less - Date Issued
- 2014
- Identifier
- CFE0005234, ucf:50578
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005234
- Title
- EVALUATING THE PERFORMANCE OF ANIMAL SHELTERS: AN APPLICATION OF DATA ENVELOPMENT ANALYSIS.
- Creator
-
Heyde, Brandy, Reilly, Charles, University of Central Florida
- Abstract / Description
-
The focus of this thesis is the application of data envelopment analysis to understand and evaluate the performance of diverse animal welfare organizations across the United States. The results include identification of the most efficient animal welfare organizations, at least among those that post statistics on their operations, and a discussion of various partnerships that may improve the performance of the more inefficient organizations. The Humane Society of the United States estimates...
Show moreThe focus of this thesis is the application of data envelopment analysis to understand and evaluate the performance of diverse animal welfare organizations across the United States. The results include identification of the most efficient animal welfare organizations, at least among those that post statistics on their operations, and a discussion of various partnerships that may improve the performance of the more inefficient organizations. The Humane Society of the United States estimates that there are 4000 - 6000 independently-run animal shelters across the United States, with an estimated 6-8 million companion animals entering them each year. Unfortunately, more than half of these animals are euthanized. The methods shared in this research illustrate how data envelopment analysis may help shelters improve these statistics through evaluation and cooperation. Data envelopment analysis (DEA) is based on the principle that the efficiency of an organization depends on its ability to transform its inputs into the desired outputs. The result of a DEA model is a single measure that summarizes the relative efficiency of each decision making unit (DMU) when compared with similar organizations. The DEA linear program defines an efficiency frontier with the most efficient animal shelters that are put into the model that "envelops" the other DMUs. Individual efficiency scores are calculated by determining how close each DMU is to reaching the frontier. The results shared in this research focus on the performance of 15 animal shelters. Lack of standardized data regarding individual animal shelter performance limited the ability to review a larger number of shelters and provide more robust results. Various programs are in place within the United States to improve the collection and availability of individual shelter performance. Specifically, the Asilomar Accords provide a strong framework for doing this and could significantly reduce euthanasia of companion animals if more shelters would adopt the practice of collecting and reporting their data in this format. It is demonstrated in this research that combining performance data with financial data within the data envelopment analysis technique can be powerful in helping shelters identify how to better deliver results. The addition of data from other organizations will make the results even more robust and useful for each shelter involved.
Show less - Date Issued
- 2008
- Identifier
- CFE0002101, ucf:47557
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002101
- Title
- Quality Indicators for Classrooms Serving Students with Autism Spectrum Disorder: A Construct Validation Study.
- Creator
-
Hopkins, Rebecca, Vasquez, Eleazar, Marino, Matthew, Dieker, Lisa, Rosenberg, Michael, University of Central Florida
- Abstract / Description
-
A rise in the prevalence of students with ASD points to the need for more qualified and effective teachers to meet the needs of this population. Existing research delineates evidence-based practices and teaching standards positively improve educational outcomes for students with ASD. Teacher evaluation systems have the potential to highlight strengths and areas for improvement in special education teaching practices. Research on observation instruments to evaluate the unique skills and...
Show moreA rise in the prevalence of students with ASD points to the need for more qualified and effective teachers to meet the needs of this population. Existing research delineates evidence-based practices and teaching standards positively improve educational outcomes for students with ASD. Teacher evaluation systems have the potential to highlight strengths and areas for improvement in special education teaching practices. Research on observation instruments to evaluate the unique skills and knowledge of special education teachers of students with ASD is limited. A need exists for high quality observation instruments to measure teacher performance in special education classrooms serving students with ASD. The purpose of this study was to examine the internal consistency reliability and the construct validity of the Quality Indicators for Classrooms Serving Students with Autism Spectrum Disorder (QIASD) scores. The researcher used a confirmatory factor analysis framework to determine if the QIASD quality indicators load onto the seven factors as hypothesized in the measurement model. The researcher found promising results but was not able to identify an acceptable model with this sample.
Show less - Date Issued
- 2018
- Identifier
- CFE0007193, ucf:52246
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007193
- Title
- Central Florida Educational Leaders' Professional Perceptions of Race to the Top Components Concerning Teacher Evaluation and Compensation.
- Creator
-
Smith, Orin, Taylor, Rosemarye, Murray, Barbara, Doherty, Walter, Vitale, Thomas, University of Central Florida
- Abstract / Description
-
This mixed-methods replication study was conducted to develop further understanding of the professional perceptions of educational leaders as to the fairness and impact of Race to the Top reforms concerning teacher evaluation and compensation on student achievement and growth. Graduate students in education and educational leadership from a target university were selected to complete an electronic survey to collect quantitative and qualitative data for analysis. Quantitative results from the...
Show moreThis mixed-methods replication study was conducted to develop further understanding of the professional perceptions of educational leaders as to the fairness and impact of Race to the Top reforms concerning teacher evaluation and compensation on student achievement and growth. Graduate students in education and educational leadership from a target university were selected to complete an electronic survey to collect quantitative and qualitative data for analysis. Quantitative results from the electronic survey revealed limited diversity in professional perceptions of the five identified components of RTTT based upon professional classification or percentage free and reduced lunch population at the school sites where assigned. Among the identified RTTT components, the component that provided for the use of school- or team-level VAM scores as part of the evaluation and compensation system was consistently viewed as the least fair and least impactful by respondents. Analysis of the qualitative data revealed a number of themes that effected respondents' professional perceptions of the RTTT initiative. The use of a value-added model in RTTT reforms, the variables considered by the model, and communication and implementation problems associated with the reforms were the central areas of concern among survey respondents. This study provided follow-up data to Windish's 2012 study and showed a negative general trajectory of the professional perceptions of educational leaders related to this high-profile, national educational reform effort.
Show less - Date Issued
- 2015
- Identifier
- CFE0005716, ucf:50157
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005716
- Title
- A FAITH-BASED PROGRAM EVALUATION: MORAL DEVELOPMENT OF SEMINARY STUDENTS AT THE LOUISIANA STATE PENITENTIARY.
- Creator
-
Sabin, Bruce, Tubbs, LeVester, University of Central Florida
- Abstract / Description
-
The purpose of this dissertation was to conduct an outcomes-based program evaluation for the Louisiana State Penitentiary (Angola) campus of the New Orleans Baptist Theological Seminary. The study included one primary research question, with two subquestions. The primary research question asked to what extent students in the program developed moral judgment consistent with program goals of rehabilitating students and preparing them for effective ministry. The first subquestion asked whether...
Show moreThe purpose of this dissertation was to conduct an outcomes-based program evaluation for the Louisiana State Penitentiary (Angola) campus of the New Orleans Baptist Theological Seminary. The study included one primary research question, with two subquestions. The primary research question asked to what extent students in the program developed moral judgment consistent with program goals of rehabilitating students and preparing them for effective ministry. The first subquestion asked whether statistically significant differences existed in the moral reasoning of students of different class years. The second subquestion asked whether statistically significant differences existed in the moral reasoning of students of different personality types. A cross-sectional study was conducted with students during the fall of 2005 using the Defining Issues Test 2 (DIT-2) and the Myers-Briggs Type Indicator (MBTI) instruments. All 101 program students were invited to participate in the study. To provide a benchmark for student scores, 30 Seminary faculty members were asked to complete the DIT-2. The student response rates were 94% for the DIT-2 instrument and 97% for the MBTI instrument. The response rate for faculty was 20%. After removing two outliers from the freshmen class, statistically significant differences were found in the principled moral reasoning scores (P scores) of freshmen (m = 22.146, sd = 12.002) and juniors (m = 30.274, sd = 13.165). No significant differences were found in moral reasoning based upon personality types. The mean P score among faculty members was 34.02 (sd = 15.25). In response to the primary research question, it was determined student scores did show moral reasoning differences consistent with the program goals. Conclusions reached in this study were limited because of the cross-sectional design. Further research is necessary before conclusions may be generalized beyond the sample.
Show less - Date Issued
- 2006
- Identifier
- CFE0001039, ucf:46795
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001039
- Title
- INVESTIGATING THE RELATIONSHIP BETWEEN ASSERTIVENESS AND PERSONALITY CHARACTERISTICS.
- Creator
-
Kirst, Laura, Murdoch, Erin, University of Central Florida
- Abstract / Description
-
Assertiveness is a learned fundamental interpersonal communication skill that helps individuals to meet the social demands of society. Although various personality factors associated with assertiveness have previously been studied, no recently published studies were identified in the review of assertiveness literature. The purpose of this study was to explore the relationship between assertiveness and the five factors of personality (extraversion, neuroticism, openness to experience,...
Show moreAssertiveness is a learned fundamental interpersonal communication skill that helps individuals to meet the social demands of society. Although various personality factors associated with assertiveness have previously been studied, no recently published studies were identified in the review of assertiveness literature. The purpose of this study was to explore the relationship between assertiveness and the five factors of personality (extraversion, neuroticism, openness to experience, agreeableness, and conscientiousness), self-esteem, social anxiety, and shyness to update past research findings. Participants completed the College Self-Expression Scale, the IPIP representation of the NEO PI-R, the Rosenberg Self-Esteem Scale, the Brief Fear of Negative Evaluation Scale, and the Revised Cheek and Buss Shyness Scale. It was hypothesized that assertiveness would correlate positively with extraversion, openness to experience, conscientiousness, agreeableness, and self-esteem. Assertiveness was further hypothesized to correlate negatively with neuroticism, social anxiety, and shyness. Results revealed direct relationships between assertiveness and self-esteem, extraversion, openness to experience, and conscientiousness, as well as inverse relationships to neuroticism, shyness, and fear of disapproval. No significant relationship was found between assertiveness and agreeableness. This study aimed to advance the understanding of the complex personality structure of low-assertive individuals.
Show less - Date Issued
- 2011
- Identifier
- CFH0004071, ucf:44797
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004071
- Title
- examining followership role orientation.
- Creator
-
Monsky, Douglas, Burke, Shawn, Shoss, Mindy, Bowers, Clint, University of Central Florida
- Abstract / Description
-
This study attempts to make steps toward filling significant gaps in the followership literature. The study of followership has often been seen through the lens of leaders' ability to impart change in follower behavior. In doing so, the literature has primarily focused on leader behavior as the agent of change rather than acknowledging followers as active agents in their own behaviors. However, some recent research has shown the emergence of followers as the primary focus, even looking at how...
Show moreThis study attempts to make steps toward filling significant gaps in the followership literature. The study of followership has often been seen through the lens of leaders' ability to impart change in follower behavior. In doing so, the literature has primarily focused on leader behavior as the agent of change rather than acknowledging followers as active agents in their own behaviors. However, some recent research has shown the emergence of followers as the primary focus, even looking at how their actions can change the way leaders act. This research focuses primarily on followership role orientations as mental models which specify the attributes an individual expects good followers to possess. In particular, follower personality traits, core self-evaluations, and self-construal were investigated as antecedents of followership role orientations (co-production and passive). Additionally, the relationship between these role orientations and enacted follower behavior (voice and upward delegation) were examined with task-specific self-efficacy investigated as a moderating variable. While most of the antecedents proved to be significant predictors, some of the coefficient directions were unexpected. Finally, results indicated that both role orientations were significant predictors of voice behavior and upward delegation.
Show less - Date Issued
- 2018
- Identifier
- CFE0007346, ucf:52127
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007346
- Title
- Efficient and Scalable Evaluation of Continuous, Spatio-temporal Queries in Mobile Computing Environments.
- Creator
-
Cazalas, Jonathan, Guha, Ratan, Bassiouni, Mostafa, Orooji, Ali, Al-Deek, Haitham, University of Central Florida
- Abstract / Description
-
A variety of research exists for the processing of continuous queries in large, mobile environments. Each method tries, in its own way, to address the computational bottleneck of constantly processing so many queries. For this research, we present a two-pronged approach at addressing this problem. Firstly, we introduce an efficient and scalable system for monitoring traditional, continuous queries by leveraging the parallel processing capability of the Graphics Processing Unit. We examine a...
Show moreA variety of research exists for the processing of continuous queries in large, mobile environments. Each method tries, in its own way, to address the computational bottleneck of constantly processing so many queries. For this research, we present a two-pronged approach at addressing this problem. Firstly, we introduce an efficient and scalable system for monitoring traditional, continuous queries by leveraging the parallel processing capability of the Graphics Processing Unit. We examine a naive CPU-based solution for continuous range-monitoring queries, and we then extend this system using the GPU. Additionally, with mobile communication devices becoming commodity, location-based services will become ubiquitous. To cope with the very high intensity of location-based queries, we propose a view oriented approach of the location database, thereby reducing computation costs by exploiting computation sharing amongst queries requiring the same view. Our studies show that by exploiting the parallel processing power of the GPU, we are able to significantly scale the number of mobile objects, while maintaining an acceptable level of performance.Our second approach was to view this research problem as one belonging to the domain of data streams. Several works have convincingly argued that the two research fields of spatio-temporal data streams and the management of moving objects can naturally come together. [IlMI10, ChFr03, MoXA04] For example, the output of a GPS receiver, monitoring the position of a mobile object, is viewed as a data stream of location updates. This data stream of location updates, along with those from the plausibly many other mobile objects, is received at a centralized server, which processes the streams upon arrival, effectively updating the answers to the currently active queries in real time.For this second approach, we present GEDS, a scalable, Graphics Processing Unit (GPU)-based framework for the evaluation of continuous spatio-temporal queries over spatio-temporal data streams. Specifically, GEDS employs the computation sharing and parallel processing paradigms to deliver scalability in the evaluation of continuous, spatio-temporal range queries and continuous, spatio-temporal kNN queries. The GEDS framework utilizes the parallel processing capability of the GPU, a stream processor by trade, to handle the computation required in this application. Experimental evaluation shows promising performance and shows the scalability and efficacy of GEDS in spatio-temporal data streaming environments. Additional performance studies demonstrate that, even in light of the costs associated with memory transfers, the parallel processing power provided by GEDS clearly counters and outweighs any associated costs.Finally, in an effort to move beyond the analysis of specific algorithms over the GEDS framework, we take a broader approach in our analysis of GPU computing. What algorithms are appropriate for the GPU? What types of applications can benefit from the parallel and stream processing power of the GPU? And can we identify a class of algorithms that are best suited for GPU computing? To answer these questions, we develop an abstract performance model, detailing the relationship between the CPU and the GPU. From this model, we are able to extrapolate a list of attributes common to successful GPU-based applications, thereby providing insight into which algorithms and applications are best suited for the GPU and also providing an estimated theoretical speedup for said GPU-based applications.
Show less - Date Issued
- 2012
- Identifier
- CFE0004222, ucf:49012
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004222
- Title
- Expectation and satisfaction of freshmen and seniors in higher education.
- Creator
-
Rodriguez, Reuban Beryrl, Lynn, Mary Ann, Education
- Abstract / Description
-
University of Central Florida College of Education Thesis; The purpose of this study was to examine the expectation, satisfaction and performance gap levels between selected freshman and seniors as measured by the selected SSI scales. The problem was to determine if expectation, satisfaction, and performance gap levels differed between freshman and seniors in 1995 and freshman and seniors in 1998 based on class level, gender and age. The study examined four selected scales from the twelve...
Show moreUniversity of Central Florida College of Education Thesis; The purpose of this study was to examine the expectation, satisfaction and performance gap levels between selected freshman and seniors as measured by the selected SSI scales. The problem was to determine if expectation, satisfaction, and performance gap levels differed between freshman and seniors in 1995 and freshman and seniors in 1998 based on class level, gender and age. The study examined four selected scales from the twelve scales derived from the Student Satisfaction Inventory (SSI): Campus Climate, Campus Life, Campus Support Services, and Instruction Effectiveness. Respondents rated all items on a 7-point Likert scale with respect to their expectations of and satisfaction with student services represented by the scales. Findings indicated that, for both 1995 and 1998, freshman had significantly higher levels of expectation than did seniors in regard to campus climate, campus life and campus support services; freshman has significantly higher levels of satisfaction than seniors with campus climate, campus life, campus support services and instructional effectiveness; seniors had significantly higher levels of unmet needs than did freshman for campus support services and instructional effectiveness, and; there were no significant differences between freshman and seniors according to gender or age. Responses of 1995 freshman and seniors and 1998 freshman and seniors were similar. The four selected scales served as having the potential to guide administrators in assessing the levels of student satisfaction with both academic and nonacademic student services.
Show less - Date Issued
- 1999
- Identifier
- CFR0011945, ucf:53107
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0011945
- Title
- Closing the Gaps in Professional Development: A Tool for School-based Leadership Teams.
- Creator
-
Sampayo, Sandra, Boote, David, Hayes, Grant, Vitale, Thomas, Flanigan, Jacquelyn, University of Central Florida
- Abstract / Description
-
The field of professional learning in education has been studied and added to extensively in the last few decades. Because the importance of learning in authentic contexts through professional dialogue has become so important, high quality, school-based professional learning is vital to building capacity at the school level. Unfortunately, the literature on professional development (PD) does not provide much guidance on how to bridge theory and practice at the school level, creating a gap....
Show moreThe field of professional learning in education has been studied and added to extensively in the last few decades. Because the importance of learning in authentic contexts through professional dialogue has become so important, high quality, school-based professional learning is vital to building capacity at the school level. Unfortunately, the literature on professional development (PD) does not provide much guidance on how to bridge theory and practice at the school level, creating a gap. With the goal of PD ultimately being to improve teacher performance and student learning, the problem with this gap is that school-level professional development is arbitrarily planned, resulting in variable outcomes. I propose the reason for this is schools lack a comprehensive framework or tool that guides the design of a quality professional learning plan. This problem was identified in Orange County Public School and this dissertation in practice aims at developing a solution that accounts for the district's specific contextual needs. My proposed solution is the design of an integrative tool that school leaders can use to guide them through the professional development planning process. The School-based Professional Learning Design Tool incorporates the professional development standards in planning, learning, implementing, and evaluating outlined in the Florida Professional Development System Evaluation Protocol. It also guides leaders in taking an inventory of the culture and context of their school in order to plan PD that will be viable given those considerations. The components of the Tool guide teams through assessing school teacher performance and student achievement data to help identify focus groups; determining gaps in learning through root cause analysis; creating goals aligned to gaps in performance; and selecting strategies for professional learning, follow-up support, and evaluation. The development of the Tool was informed by the extant literature on professional development, organizational theory, state and national standards for professional development, and principles of design. The Tool is to be completed in four phases. Phases one and two, the focus of this paper, include the literature review, organizational assessment, design specifications, and the first iteration of the Tool. In the next phases, the goals are to solicit feedback from an expert panel review, create a complete version of the Tool, and pilot it in elementary schools. Although the development of the Tool through its final phases will refine it considerably, there are limitations that will transcend all iterations. While the Tool incorporates best practices in professional development, the lack of empirical evidence on the effectiveness of specific PD elements in the literature renders this Tool only a best guess in helping schools plan effective professional development. Another limitation is that the Tool is not prescriptive and cannot use school data to make decisions for what strategies to implement. Taking these limitations into consideration, the use of this Tool can significantly impact the quality and effectiveness of professional development in schools.
Show less - Date Issued
- 2015
- Identifier
- CFE0005883, ucf:50889
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005883
- Title
- Field Evaluation of Insync Adaptive Traffic Signal Control System in Multiple Environments Using Multiple Approaches.
- Creator
-
Shafik, Md Shafikul Islam, Radwan, Essam, Abou-Senna, Hatem, Eluru, Naveen, University of Central Florida
- Abstract / Description
-
Since the beginning of signalization of intersections, the management of traffic congestion is one of most critical challenges specifically for the city and urbanized area. Almost all the municipal agencies struggle to manage the perplexities associated with traffic congestion or signal control. The Adaptive Traffic Control System (ATCS), an advanced and major technological component of the Intelligent Transportation Systems (ITS) is considered the most dynamic and real-time traffic...
Show moreSince the beginning of signalization of intersections, the management of traffic congestion is one of most critical challenges specifically for the city and urbanized area. Almost all the municipal agencies struggle to manage the perplexities associated with traffic congestion or signal control. The Adaptive Traffic Control System (ATCS), an advanced and major technological component of the Intelligent Transportation Systems (ITS) is considered the most dynamic and real-time traffic management technology and has potential to effectively manage rapidly varying traffic flow relative to the current state-of-the-art traffic management practices.InSync ATCS is deployed in multiple states throughout the US and expanding on a large scale. Although there had been several 'Measure of Effectiveness' studies performed previously, the performance of InSync is not unquestionable especially because the previous studies failed to subject for multiple environments, approaches, and variables. Most studies are accomplished through a single approach using simple/na(&)#239;ve before-after method without any control group/parameter. They also lacked ample statistical analysis, historical, maturation and regression artifacts. An attempt to evaluate the InSync ATCS in varying conditions through multiple approaches was undertaken for the SR-434 and Lake Underhill corridor in Orange County, Florida. A before-after study with an adjacent corridor as control group and volume as a control parameter has been performed where data of multiple variables were collected by three distinct procedures. The average/floating-car method was utilized as a rudimentary data collection process and 'BlueMac' and 'InSync' system database was considered as secondary data sources. Data collected for three times a day for weekdays and weekends before and after the InSync ATCS was deployed.Results show variation in both performance and scale. It proved ineffective in some of the cases, especially for the left turns, total intersection queue/delay and when the intersection volumes approach capacity. The results are verified through appropriate statistical analysis.
Show less - Date Issued
- 2017
- Identifier
- CFE0006915, ucf:51687
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006915
- 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
- Central Florida Educational Leaders' Professional Opinions of the Race to the Top Grant Components Concerning Teacher Evaluation and Compensation Prior to Implementation.
- Creator
-
Windish, Daniel, Taylor, Rosemarye, Pawlas, George, Doherty, Walter, Vitale, Thomas, University of Central Florida
- Abstract / Description
-
This mixed-methods study was conducted to explore the professional opinions of educational leaders regarding selected components in the Race to the Top (RTTT) grant concerning teacher evaluation and compensation and the potential impact on student achievement. A target university was selected that had students who were professionals in the field of education in either instructional or administrative jobs and were pursuing their doctorates in both Education and Educational Leadership. A...
Show moreThis mixed-methods study was conducted to explore the professional opinions of educational leaders regarding selected components in the Race to the Top (RTTT) grant concerning teacher evaluation and compensation and the potential impact on student achievement. A target university was selected that had students who were professionals in the field of education in either instructional or administrative jobs and were pursuing their doctorates in both Education and Educational Leadership. A researcher created survey and follow-up interview were utilized to gather both quantitative and qualitative data for analysis. Quantitative findings revealed that statistically significant differences in the opinions of educational leaders about the potential impact of the RTTT grant teacher evaluation and compensation components on student achievement existed between two types of professional classification (instructional or administrative). No statistically significant relationship was found between self-reported knowledge of the RTTT and opinions of the fairness of the RTTT teacher evaluation and compensation components. Also, no statistically significant difference was found in the professional opinions about the potential impact of the RTTT grant teacher evaluation and compensation components on student achievement when self-reported school poverty percentage was considered.From qualitative findings, themes emerged surrounding the uncertainty and lack of understanding about the RTTT grant's implementation. Though this study provided baseline data on the opinions of educational leaders on the RTTT teacher evaluation and compensation components, there is still much to be learned about the RTTT grant.
Show less - Date Issued
- 2012
- Identifier
- CFE0004633, ucf:49929
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004633
- Title
- Investigation of infrared thermography for subsurface damage detection of concrete structures.
- Creator
-
Hiasa, Shuhei, Catbas, Necati, Tatari, Omer, Nam, Boo Hyun, Zaurin, Ricardo, Xanthopoulos, Petros, University of Central Florida
- Abstract / Description
-
Deterioration of road infrastructure arises from aging and various other factors. Consequently, inspection and maintenance have been a serious worldwide problem. In the United States, degradation of concrete bridge decks is a widespread problem among several bridge components. In order to prevent the impending degradation of bridges, periodic inspection and proper maintenance are indispensable. However, the transportation system faces unprecedented challenges because the number of aging...
Show moreDeterioration of road infrastructure arises from aging and various other factors. Consequently, inspection and maintenance have been a serious worldwide problem. In the United States, degradation of concrete bridge decks is a widespread problem among several bridge components. In order to prevent the impending degradation of bridges, periodic inspection and proper maintenance are indispensable. However, the transportation system faces unprecedented challenges because the number of aging bridges is increasing under limited resources, both in terms of budget and personnel. Therefore, innovative technologies and processes that enable bridge owners to inspect and evaluate bridge conditions more effectively and efficiently with less human and monetary resources are desired. Traditionally, qualified engineers and inspectors implemented hammer sounding and/or chain drag, and visual inspection for concrete bridge deck evaluations, but these methods require substantial field labor, experience, and lane closures for bridge deck inspections. Under these circumstances, Non-Destructive Evaluation (NDE) techniques such as computer vision-based crack detection, impact echo (IE), ground-penetrating radar (GPR) and infrared thermography (IRT) have been developed to inspect and monitor aging and deteriorating structures rapidly and effectively. However, no single method can detect all kinds of defects in concrete structures as well as the traditional inspection combination of visual and sounding inspections; hence, there is still no international standard NDE methods for concrete bridges, although significant progress has been made up to the present.This research presents the potential to reduce a burden of bridge inspections, especially for bridge decks, in place of traditional chain drag and hammer sounding methods by IRT with the combination of computer vision-based technology. However, there were still several challenges and uncertainties in using IRT for bridge inspections. This study revealed those challenges and uncertainties, and explored those solutions, proper methods and ideal conditions for applying IRT in order to enhance the usability, reliability and accuracy of IRT for concrete bridge inspections. Throughout the study, detailed investigations of IRT are presented. Firstly, three different types of infrared (IR) cameras were compared under active IRT conditions in the laboratory to examine the effect of photography angle on IRT along with the specifications of cameras. The results showed that when IR images are taken from a certain angle, each camera shows different temperature readings. However, since each IR camera can capture temperature differences between sound and delaminated areas, they have a potential to detect delaminated areas under a given condition in spite of camera specifications even when they are utilized from a certain angle. Furthermore, a more objective data analysis method than just comparing IR images was explored to assess IR data. Secondly, coupled structural mechanics and heat transfer models of concrete blocks with artificial delaminations used for a field test were developed and analyzed to explore sensitive parameters for effective utilization of IRT. After these finite element (FE) models were validated, critical parameters and factors of delamination detectability such as the size of delamination (area, thickness and volume), ambient temperature and sun loading condition (different season), and the depth of delamination from the surface were explored. This study presents that the area of delamination is much more influential in the detectability of IRT than thickness and volume. It is also found that there is no significant difference depending on the season when IRT is employed. Then, FE model simulations were used to obtain the temperature differences between sound and delaminated areas in order to process IR data. By using this method, delaminated areas of concrete slabs could be detected more objectively than by judging the color contrast of IR images. However, it was also found that the boundary condition affects the accuracy of this method, and the effect varies depending on the data collection time. Even though there are some limitations, integrated use of FE model simulation with IRT showed that the combination can be reduce other pre-tests on bridges, reduce the need to have access to the bridge and also can help automate the IRT data analysis process for concrete bridge deck inspections. After that, the favorable time windows for concrete bridge deck inspections by IRT were explored through field experiment and FE model simulations. Based on the numerical simulations and experimental IRT results, higher temperature differences in the day were observed from both results around noontime and nighttime, although IRT is affected by sun loading during the daytime heating cycle resulting in possible misdetections. Furthermore, the numerical simulations show that the maximum effect occurs at night during the nighttime cooling cycle, and the temperature difference decreases gradually from that time to a few hours after sunrise of the next day. Thus, it can be concluded that the nighttime application of IRT is the most suitable time window for bridge decks. Furthermore, three IR cameras with different specifications were compared to explore several factors affecting the utilization of IRT in regards to subsurface damage detection in concrete structures, specifically when the IRT is utilized for high-speed bridge deck inspections at normal driving speeds under field laboratory conditions. The results show that IRT can detect up to 2.54 cm delamination from the concrete surface at any time period. This study revealed two important factors of camera specifications for high-speed inspection by IRT as shorter integration time and higher pixel resolution.Finally, a real bridge was scanned by three different types of IR cameras and the results were compared with other NDE technologies that were implemented by other researchers on the same bridge. When compared at fully documented locations with 8 concrete cores, a high-end IR camera with cooled detector distinguished sound and delaminated areas accurately. Furthermore, indicated location and shape of delaminations by three IR cameras were compared to other NDE methods from past research, and the result revealed that the cooled camera showed almost identical shapes to other NDE methods including chain drag. It should be noted that the data were collected at normal driving speed without any lane closures, making it a more practical and faster method than other NDE technologies. It was also presented that the factor most likely to affect high-speed application is integration time of IR camera as well as the conclusion of the field laboratory test.The notable contribution of this study for the improvement of IRT is that this study revealed the preferable conditions for IRT, specifically for high-speed scanning of concrete bridge decks. This study shows that IRT implementation under normal driving speeds has high potential to evaluate concrete bridge decks accurately without any lane closures much more quickly than other NDE methods, if a cooled camera equipped with higher pixel resolution is used during nighttime. Despite some limitations of IRT, the data collection speed is a great advantage for periodic bridge inspections compared to other NDE methods. Moreover, there is a high possibility to reduce inspection time, labor and budget drastically if high-speed bridge deck scanning by the combination of IRT and computer vision-based technology becomes a standard bridge deck inspection method. Therefore, the author recommends combined application of the high-speed scanning combination and other NDE methods to optimize bridge deck inspections.
Show less - Date Issued
- 2016
- Identifier
- CFE0006323, ucf:51575
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006323
- Title
- TRAFFIC SAFETY ASSESSMENT OF DIFFERENT TOLL COLLECTION SYSTEMS ON EXPRESSWAYS USING MULTIPLE ANALYTICAL TECHNIQUES.
- Creator
-
Abuzwidah, Muamer, Abdel-Aty, Mohamed, Radwan, Essam, Uddin, Nizam, University of Central Florida
- Abstract / Description
-
Traffic safety has been considered one of the most important issues in the transportation field. Crashes have caused extensive human and economic losses. With the objective of reducing crash occurrence and alleviating crash injury severity, major efforts have been dedicated to reveal the hazardous factors that affect crash occurrence. With these consistent efforts, both fatalities and fatality rates from road traffic crashes in many countries have been steadily declining over the last ten...
Show moreTraffic safety has been considered one of the most important issues in the transportation field. Crashes have caused extensive human and economic losses. With the objective of reducing crash occurrence and alleviating crash injury severity, major efforts have been dedicated to reveal the hazardous factors that affect crash occurrence. With these consistent efforts, both fatalities and fatality rates from road traffic crashes in many countries have been steadily declining over the last ten years. Nevertheless, according to the World Health Organization, the world still lost 1.24 million lives from road traffic crashes in the year of 2013. And without action, traffic crashes on the roads network are predicted to result in deaths of around 1.9 million people, and up to 50 million more people suffer non-fatal injuries annually, with many incurring a disability as a result of their injury by the year 2020. To meet the transportation needs, the use of expressways (toll roads) has risen dramatically in many countries in the past decade. In fact, freeways and expressways are considered an important part of any successful transportation system. These facilities carry the majority of daily trips on the transportation network. Although expressways offer high level of service, and are considered the safest among other types of roads, traditional toll collection systems may have both safety and operational challenges. The traditional toll plazas still experience many crashes, many of which are severe. Therefore, it becomes more important to evaluate the traffic safety impacts of using different tolling systems. The main focus of the research in this dissertation is to provide an up-to-date safety impact of using different toll collection systems, as well as providing safety guidelines for these facilities to promote safety and enhance mobility on expressways. In this study, an extensive data collection was conducted that included one hundred mainline toll plazas located on approximately 750 miles of expressways in Florida. Multiple sources of data available online maintained by Florida Department of Transportation were utilized to identify traffic, geometric and geographic characteristics of the locations as well as investigating and determination of the most complete and accurate data. Different methods of observational before-after and Cross-Sectional techniques were used to evaluate the safety effectiveness of applying different treatments on expressways. The Before-After method includes Na(&)#239;ve Before-After, Before-After with Comparison Group, and Before-After with Empirical Bayesian. A set of Safety Performance Functions (SPFs) which predict crash frequency as a function of explanatory variables were developed at the aggregate level using crash data and the corresponding exposure and risk factors. Results of the aggregate traffic safety analysis can be used to identify the hazardous locations (hot spots) such as traditional toll plazas, and also to predict crash frequency for untreated sites in the after period in the Before-After with EB method or derive Crash Modification Factors (CMF) for the treatment using the Cross-Sectional method. This type of analysis is usually used to improve geometric characteristics and mainly focus on discovering the risk factors that are related to the total crash frequency, specific crash type, and/or different crash severity levels. Both simple SPFs (with traffic volume only as an explanatory variable) and full SPFs (with traffic volume and additional explanatory variable(s)) were used to estimate the CMFs and only CMFs with lower standard error were recommended.The results of this study proved that safety effectiveness was significantly improved across all locations that were upgraded from Traditional Mainline Toll Plazas (TMTP) to the Hybrid Mainline Toll Plazas (HMTP) system. This treatment significantly reduced total, Fatal-and-Injury (F+I), and Rear-End crashes by 47, 46 and 65 percent, respectively. Moreover, this study examined the traffic safety impact of using different designs, and diverge-and-merge areas of the HMTP. This design combines either express Open Road Tolling (ORT) lanes on the mainline and separate traditional toll collection to the side (design-1), or traditional toll collection on the mainline and separate ORT lanes to the side (design-2). It was also proven that there is a significant difference between these designs, and there is an indication that design-1 is safer and the majority of crashes occurred at diverge-and-merge areas before and after these facilities. However, design-2 could be a good temporary design at locations that have low prepaid transponder (Electronic Toll Collection (ETC)) users. In other words, it is dependent upon the percentage of the ETC users. As this percentage increases, more traffic will need to diverge and merge; thus, this design becomes riskier. In addition, the results indicated significant relationships between the crash frequency and toll plaza types, annual average daily traffic, and drivers' age. The analysis showed that the conversion from TMTP to the All-Electronic Toll Collection (AETC) system resulted in an average reduction of 77, 76, and 67 percent for total, F+I, and Property Damage Only (PDO) crashes, respectively; for rear end and Lane Change Related (LCR) crashes the average reductions were 81 and 75 percent, respectively. The conversion from HMTP to AETC system enhanced traffic safety by reducing crashes by an average of 23, 29 and 19 percent for total, F+I, and PDO crashes; also, for rear end and LCR crashes, the average reductions were 15 and 21 percent, respectively. Based on these results, the use of AETC system changed toll plazas from the highest risk sections on Expressways to be similar to regular segments. Therefore, it can be concluded that the use of AETC system was proven to be an excellent solution to several traffic operations as well as environmental and economic problems. For those agencies that cannot adopt the HMTP and the AETC systems, improving traffic safety at traditional toll plazas should take a priority.This study also evaluates the safety effectiveness of the implementation of High-Occupancy Toll lanes (HOT Lanes) as well as adding roadway lighting to expressways. The results showed that there were no significant impact of the implementation of HOT lanes on the roadway segment as a whole (HOT and Regular Lanes combined). But there was a significant difference between the regular lanes and the HOT lanes at the same roadway segment; the crash count increased at the regular lanes and decreased at the HOT lanes. It was found that the total and F+I crashes were reduced at the HOT lanes by an average of 25 and 45 percent, respectively. This may be attributable to the fact that the HOT lanes became a highway within a highway. Moreover adding roadway lighting has significantly improved traffic safety on the expressways by reducing the night crashes by approximately 35 percent.Overall, the proposed analyses of the safety effectiveness of using different toll collection systems are useful in providing expressway authorities with detailed information on where countermeasures must be implemented. This study provided for the first time an up-to-date safety impact of using different toll collection systems, also developed safety guidelines for these systems which would be useful for practitioners and roadway users.
Show less - Date Issued
- 2014
- Identifier
- CFE0005751, ucf:50100
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005751
