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- Title
- A COMPARATIVE STATIC ANALYSIS FOR INVASIVE SPECIES MANAGEMENT UNDER RISK NEUTRAL PREFERENCES.
- Creator
-
Safford, Pamela, Finnoff, David, University of Central Florida
- Abstract / Description
-
This thesis investigates the optimal ex-ante mix of self-protection and self-insurance technologies employed to reduce the risk of biological invaders in the presence of exogenous variables within the probability and damage functions. This is accomplished by using a theoretical endogenous risk model that extends previously developed frameworks. This thesis contributes to the previous work in two ways. (1) employing a general framework with simultaneous decision making over self-protection and...
Show moreThis thesis investigates the optimal ex-ante mix of self-protection and self-insurance technologies employed to reduce the risk of biological invaders in the presence of exogenous variables within the probability and damage functions. This is accomplished by using a theoretical endogenous risk model that extends previously developed frameworks. This thesis contributes to the previous work in two ways. (1) employing a general framework with simultaneous decision making over self-protection and self-insurance, this thesis analyzes how each parameter including income, the costs of each activity, an exogenous factor that affects only the probability of an invasion, and a separate exogenous factor that affects only the damages influence the level of self-protection and self-insurance. (2) the comparative static results are derived in the benchmark case of risk neutral preferences and qualitatively compared to an extended case of risk averse preferences. The results of the analysis indicate that under risk neutral preferences the signs of the comparative statics are unambiguous while under risk aversion the results are not clearly defined. Thus, the ambiguity of signs in the latter case can be attributed to the unobservable utility terms present under risk averse preferences. Therefore, it can be concluded that the model is not capable of yielding a decision criteria that will hold universally because the results are dependent on the nature of the risk averse curve
Show less - Date Issued
- 2004
- Identifier
- CFE0000156, ucf:46172
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000156
- Title
- A COMPARATIVE STUDY OF ANT COLONY OPTIMIZATION.
- Creator
-
Becker, Matthew, Mohapatra, Ram, University of Central Florida
- Abstract / Description
-
Ant Colony Optimization (ACO) belongs to a class of biologically-motivated approaches to computing that includes such metaheuristics as artificial neural networks, evolutionary algorithms, and artificial immune systems, among others. Emulating to varying degrees the particular biological phenomena from which their inspiration is drawn, these alternative computational systems have succeeded in finding solutions to complex problems that had heretofore eluded more traditional techniques. Often,...
Show moreAnt Colony Optimization (ACO) belongs to a class of biologically-motivated approaches to computing that includes such metaheuristics as artificial neural networks, evolutionary algorithms, and artificial immune systems, among others. Emulating to varying degrees the particular biological phenomena from which their inspiration is drawn, these alternative computational systems have succeeded in finding solutions to complex problems that had heretofore eluded more traditional techniques. Often, the resulting algorithm bears little resemblance to its biological progenitor, evolving instead into a mathematical abstraction of a singularly useful quality of the phenomenon. In such cases, these abstract computational models may be termed biological metaphors. Mindful that a fine line separates metaphor from distortion, this paper outlines an attempt to better understand the potential consequences an insufficient understanding of the underlying biological phenomenon may have on its transformation into mathematical metaphor. To that end, the author independently develops a rudimentary ACO, remaining as faithful as possible to the behavioral qualities of an ant colony. Subsequently, the performance of this new ACO is compared with that of a more established ACO in three categories: (1) the hybridization of evolutionary computing and ACO, (2) the efficacy of daemon actions, and (3) theoretical properties and convergence proofs.
Show less - Date Issued
- 2006
- Identifier
- CFE0001192, ucf:46844
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001192
- Title
- A Comparative Study of Computer-Assisted Instruction Versus Classroom Training of Naval Technicians of Varying Aptitude.
- Creator
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Dwyer, Daniel J., Burrough, Wayne A., Social Sciences
- Abstract / Description
-
University of Central Florida College of Social Sciences Thesis; Any discussion of computer-assisted instruction (CAI) cannot proceed very far without first examining the issue of programmed instruction (PI). CAI is a relatively recent development in the area of education and training, whereas PI enjoys a somewhat longer history. Nonetheless, PI lies at the very heart of CAI and forms the base on which CAI exists. CAI then, may be viewed as a mode or type of PI. B. F. Skinner's work in the...
Show moreUniversity of Central Florida College of Social Sciences Thesis; Any discussion of computer-assisted instruction (CAI) cannot proceed very far without first examining the issue of programmed instruction (PI). CAI is a relatively recent development in the area of education and training, whereas PI enjoys a somewhat longer history. Nonetheless, PI lies at the very heart of CAI and forms the base on which CAI exists. CAI then, may be viewed as a mode or type of PI. B. F. Skinner's work in the 1940's with the principles of operant conditioning laid the groundwork for the concept of PI (Garner, 1966). Operant conditioning is a type of conditioning whereby an emitted response is reinforced. The reinforcement should increase the strength of the response and presumably increase the chances that the response will occur again (Munn, Fernald, & Fernald, 1972). Operant conditioning, in which an individual is conditioned to behave in the direction of a predetermined goal, is achieved through the contingent reinforcement of a series of steps. These steps of action are linked together in a chain of successive approximations. 1 Each link of the chain approximates the end goal slightly more than the previous link. This chain of successive approximations is followed until the end behavior is achieved (Garner, 1966). 2 In this respect, PI makes use of the sequencing of small successive steps and contingent reinforcement to achieve some desired end goal , namely, achieving the lesson objective. This "Skinnerian" or linear form of PI requires the student to proceed through a forward moving chain in a step-by-step fashion until the end behavior is achieved. The step-by-step sequence, as it pertains to PI, refers to the individual segments or frames of a PI lesson. Each frame might be considered one step of the entire PI lesson. These frames, which should flow logically from one to the next, should build upon each other and approximate the lesson objective. Periodically, progress should be monitored in order to assure that the student is comprehending the lesson material (Wilson and Tosti, 1972). Typically, this is accomplished by incorporating multiple choice or true/false questions within the PI lesson itself . By so doing, student performances can be checked and appropriate actions taken within the concept of reinforcement. Deterline (1962) argues that all learned behavior is based on, reinforcement. Individuals learn by acting on their environment and, in turn, are influenced by the consequences of their actions (Deterline, 1962) . ""Then consequences strengthen behavior, reinforcement is said to have taken place.
Show less - Date Issued
- 1979
- Identifier
- CFR0003505, ucf:53141
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0003505
- Title
- A COMPARATIVE STUDY OF MEDICAL AND LITERARY REPRESENTATIONS OF SHELL SHOCK, 1914-50.
- Creator
-
Das, Madison, Kane, Louise, University of Central Florida
- Abstract / Description
-
This thesis explores shell shock--a common but misunderstood disorder seen in soldiers of World War One--through a Medical Humanities framework. Chapter 1 conducts a traditional medical review of scientific articles published on the pathology, symptoms, and treatment of shell shock between 1914-50. Chapter 2 builds upon this by offering a literary reading of Rebecca West's novel, The Return of the Soldier, which was published as the war drew to a close in 1918. The reading of West draws upon...
Show moreThis thesis explores shell shock--a common but misunderstood disorder seen in soldiers of World War One--through a Medical Humanities framework. Chapter 1 conducts a traditional medical review of scientific articles published on the pathology, symptoms, and treatment of shell shock between 1914-50. Chapter 2 builds upon this by offering a literary reading of Rebecca West's novel, The Return of the Soldier, which was published as the war drew to a close in 1918. The reading of West draws upon the medical research detailed in Chapter 1 to offer new conclusions about Chris's shell shock. The thesis shows how taking an interdisciplinary approach to shell shock enables the development of new perspectives of and approaches to shell shock, its history and significance, and its links to present-day mental health conditions such as post-traumatic stress disorder (PTSD).
Show less - Date Issued
- 2019
- Identifier
- CFH2000543, ucf:45655
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000543
- Title
- A COMPARATIVE STUDY OF REFUGEES AND IDPS.
- Creator
-
Sanchez, Laura, Sadri, Houman, University of Central Florida
- Abstract / Description
-
There is a grave concern for the life, liberty and security of individuals who have been forced to leave their homes and have become dispersed within their native countries and throughout the Asian continent. These internally displaced persons and refugees are the subject of this study. Some of the themes that will be discussed include: civil war, human rights violations and the economy, since these are the problems affecting the populations of Afghanistan, Pakistan and Myanmar. These case...
Show moreThere is a grave concern for the life, liberty and security of individuals who have been forced to leave their homes and have become dispersed within their native countries and throughout the Asian continent. These internally displaced persons and refugees are the subject of this study. Some of the themes that will be discussed include: civil war, human rights violations and the economy, since these are the problems affecting the populations of Afghanistan, Pakistan and Myanmar. These case studies are of particular interest because Afghanistan is where most refugees come from, Myanmar has the longest-running military regime and Pakistan hosts the most refugees in the world. All three case studies are currently in a state of civil war, are breeding grounds for violations of human rights and have corrupt economies. Thus, the goal is to end armed conflict, to put an end to the human rights violations that come with it and to restructure the economies in each of these nation states so that the internally displaced persons and refugees can be repatriated, since displacement has become too much of a burden for Afghanistan, Pakistan and Myanmar's neighboring countries, who have been taking in all of the refugees from said countries. Theoretically, if the issues causing displacement were to be solved, then the countries that host refugees would be able to concentrate on their own populations. This study can potentially address the gap between knowledge, policy formation, and policy implementation to realize the goals of the international community in dealing with the displacement crisis.
Show less - Date Issued
- 2011
- Identifier
- CFH0003829, ucf:44731
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0003829
- Title
- A Comparative Study of Student Performance, Attendance, and Discipline in a Community School in a Large Urban School District in the Southern United States.
- Creator
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Morrow, Juanita, Murray, Barbara, Baldwin, Lee, Storey, Valerie A., Doherty, Walter, Doaks, Synthia, University of Central Florida
- Abstract / Description
-
The goal of this research was to investigate the impact of the community school practices such as extended/supplemental enrichment time, character development, anger management, counseling, tutoring, and mental and physical healthcare on student performance, attendance and discipline at a community school in a large urban school district in the southern U.S. The select population and sample for this study was the school's 2011-2012 senior cohort, before the school's implementation of...
Show moreThe goal of this research was to investigate the impact of the community school practices such as extended/supplemental enrichment time, character development, anger management, counseling, tutoring, and mental and physical healthcare on student performance, attendance and discipline at a community school in a large urban school district in the southern U.S. The select population and sample for this study was the school's 2011-2012 senior cohort, before the school's implementation of community school practices and the school's 2015-2016 senior cohort, after implementation of community school practices at the select community school. In an effort to more accurately determine the effectiveness of the community school practices, the study also compared the performance of the community school after implementation of the community school practices to two comparison high schools in the same urban school district; not incorporating the community school practices into instruction, organizational structure, and policy. T-tests analysis and descriptive statistics analysis demonstrated that there was statistical improvement in student performance in regard to cumulative grade point average, graduation rate, and attendance for the 2015-2016 senior cohort. However, improvement was not present in discipline and the frequency distribution of industry certifications for the 2015-2016 senior cohort when compared to the 2011-2012 senior cohort.
Show less - Date Issued
- 2017
- Identifier
- CFE0006769, ucf:51871
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006769
- Title
- A Comparative Study of the Effect of Block Scheduling and Traditional Scheduling on Student Achievement for the Florida Algebra 1 End-of-Course Examination.
- Creator
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Underwood, Arthur, Murray, Kenneth, Murray, Barbara, Baldwin, Lee, Hutchinson, Cynthia, University of Central Florida
- Abstract / Description
-
The focus of this research was on the effect of school schedules on student achievement for ninth-grade students in a Florida school district. Data were collected from two central Florida high schools from the 2011-2012 and 2012-2013 school years. Five one-way analyses of covariance (ANCOVA) were performed to ascertain if there was any interaction between school schedules and student achievement. Examined were the interactions (a) between schedule and schools, (b) schedule and male students, ...
Show moreThe focus of this research was on the effect of school schedules on student achievement for ninth-grade students in a Florida school district. Data were collected from two central Florida high schools from the 2011-2012 and 2012-2013 school years. Five one-way analyses of covariance (ANCOVA) were performed to ascertain if there was any interaction between school schedules and student achievement. Examined were the interactions (a) between schedule and schools, (b) schedule and male students, (c) schedule and female students, (d) schedule and Black students, and (e) schedule and Hispanic students. The independent variable, school schedule, consisted of two levels: traditional schedule and A/B block schedule. The dependent variable was the spring Algebra 1 End- of-Course Examination (EOC), and the covariate was the Florida Comprehensive Assessment Test (FCAT) Mathematics Eighth-grade Development Scale Score. School schedule was not significantly related to students' spring Algebra 1 EOC scores, F(1,788) p = .932. School schedule was not significantly related to male students' spring Algebra 1 EOC scores, F(1,392) p = .698. School schedule was not significantly related to female students' spring Algebra 1 EOC scores, F(1,393) p = .579. School schedule was not significantly related to Black students' spring Algebra 1 EOC scores, F(1,186) p = .545. School schedule was not significantly related to Hispanic students' spring Algebra 1 EOC scores, F (1,184) p = .700.
Show less - Date Issued
- 2014
- Identifier
- CFE0005433, ucf:50406
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005433
- Title
- A Comparative Study of Two Models of Presenting Phrasal Verbs.
- Creator
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Majeed, Nagham, Mihai, Florin, Folse, Keith, Purmensky, Kerry, Boote, David, University of Central Florida
- Abstract / Description
-
Learning phrasal verbs (PVs) is of vital importance in both written and spokenEnglish, especially for those English learners who must use English as a second language (ESL) in their daily interactions with proficient speakers. This study focused on two particles (out and in) in exploring a more effective model for presenting PVs in an ESL context. PVs are the focus of this empirical study because they are an essential component of English vocabulary but are typically regarded as very...
Show moreLearning phrasal verbs (PVs) is of vital importance in both written and spokenEnglish, especially for those English learners who must use English as a second language (ESL) in their daily interactions with proficient speakers. This study focused on two particles (out and in) in exploring a more effective model for presenting PVs in an ESL context. PVs are the focus of this empirical study because they are an essential component of English vocabulary but are typically regarded as very difficult for ESL students to master.This study used a quasi-experimental design to compare the effect of instruction through image-schematic container illustrations of 16 PVs (supported by the container metaphor model) and a definition-only illustration of the same 16 PVs (supported by the traditional model of PV instruction). The participants in this experiment consisted of 28 intermediate-level students enrolled in intensive English program (IEP) courses at a metropolitan college in the southeastern United States during the summer of 2019; the students were divided into a control group and an experimental group. Four types of instruments, including one pretest and three posttests, were used in this experiment to examine the effectiveness of the container metaphor model compared with the traditional model. The findings of this study challenge the traditional view regarding the difficulty of teaching the meanings of these 16 PVs and suggest that the container metaphor model is more conducive to PV learning and retention. However, the findings of this study showed little evidence that the container metaphor model can assist in guessing the meaning of previously unknown PVs. The practical implications demonstrated from these results can be used by ESL teachers and educational stakeholders to validate English-teaching practices. Therefore, this model was recommended to be considered as one model of presenting PVs. The current study demonstrated that researchers should include infrequent PVs in their research in addition to the frequent ones. Finally, limitations of the current study are identified and recommendations for organizing future studies on this topic are proposed.
Show less - Date Issued
- 2019
- Identifier
- CFE0007834, ucf:52829
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007834
- Title
- A COMPARATIVE STUDY: WOMEN'S RIGHTS IN KAZAKHSTAN, UZBEKISTAN, AND TAJIKISTAN.
- Creator
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Ginn, Megan A, Sadri, Houman, University of Central Florida
- Abstract / Description
-
After 1991 five countries emerged out of the fall of the Soviet Union to create a new region: Central Asia. No longer dominated by Soviet rule these countries fought to overcome barriers to independence and struggled to be seen by the international community as developed countries. However, these countries were far from developed and had to pay the high cost of human rights to get what they desired. This study researches and analyzes how Kazakhstan, Uzbekistan, and Tajikistan have traded the...
Show moreAfter 1991 five countries emerged out of the fall of the Soviet Union to create a new region: Central Asia. No longer dominated by Soviet rule these countries fought to overcome barriers to independence and struggled to be seen by the international community as developed countries. However, these countries were far from developed and had to pay the high cost of human rights to get what they desired. This study researches and analyzes how Kazakhstan, Uzbekistan, and Tajikistan have traded the rights of women to achieve a placebo of development. Two of the largest violations of women�s rights that have manifested because of the government�s direct actions are domestic abuse and sex trafficking. The government�s structure and leadership, the economic opportunity for women, and the cultural acceptance have all been orchestrated by the government to create a society where women�s rights are unheard of. The actions taken by the three governments seem extensive on paper and international covenants yet are never implemented to help society. Through this research women�s rights in the Central Asian countries of Kazakhstan, Uzbekistan, and Tajikistan are examined through the prevalence and acceptance of both domestic violence and sex trafficking. The international conventions, domestic policies, and actions taken by political leaders are examined to better understand the underlying reasons that contribute to the persistence of these attitudes.
Show less - Date Issued
- 2016
- Identifier
- CFH2000067, ucf:45515
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000067
- Title
- A COMPARISON AND EVALUATIONOFCOMMON PID TUNING METHODS.
- Creator
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Youney, Justin, Haralambous, Michael, University of Central Florida
- Abstract / Description
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The motivation behind this thesis is to consolidate and evaluate the most common Proportional Integral Derivative (PID) controller tuning techniques used in industry. These are the tuning techniques used when the plant transfer function is not known. Many of these systems are poorly tuned because such consolidated information is not easily found in one single source such as this thesis. Once one of the tuning methods are applied almost always there will be further fine tuning needed to bring...
Show moreThe motivation behind this thesis is to consolidate and evaluate the most common Proportional Integral Derivative (PID) controller tuning techniques used in industry. These are the tuning techniques used when the plant transfer function is not known. Many of these systems are poorly tuned because such consolidated information is not easily found in one single source such as this thesis. Once one of the tuning methods are applied almost always there will be further fine tuning needed to bring the system into the required design criteria. The purpose here is to find out which tuning technique will yield the lowest percent overshoot and the shortest settling time for all situations. This will give the engineer a good starting point; to minimally further adjust parameters to achieve the desired design criteria. There will also be discussion on the various algorithms used in industry. Four tuning methods will be evaluated based on their ability to control different style plants. The comparison criteria will be percent overshoot and settling time for an applied step input. The tuning methods chosen were the Ziegler-Nichols Open Loop method, the CHR method for 0% overshoot, the Ziegler-Nichols Closed Loop method, and the Rule of Thumb method. It is shown that for a second order plant with a lag and pure integration in its transfer function, the Open Loop method yielded the lowest results in terms of percent overshoot, yet the Closed Loop method had the shortest settling time. For systems of higher order than two it was shown that the CHR method gave the best performance however as the order increased the Closed Loop method gave a shorter settling time. For systems of higher order with varying lags in series the CHR method gave the best results. The Rule of thumb method usually gave similar results to that of the Closed Loop method; however for higher order systems the Rule of Thumb method gave less percent overshoot but with a longer settling time than the Closed Loop method. Since these tuning methods are used when the plant transfer function is not known, and none of the rules were found to give consistently the lowest percent overshoot, and settling time for all plants tested, there can not be a recommendation as to which method an engineer should choose to use. If the plant transfer function is known or can be reasonably modeled then the following recommendations can be followed. When tuning systems with pure integrations in their transfer function the Open Loop or Closed Loop method be used. When tuning systems of order higher than two the CHR or Closed Loop method should be used, however with high order systems with varying lags the CHR method should be used. It is the responsibility of the engineer to know how and when to implement each of the tuning rules properly.
Show less - Date Issued
- 2007
- Identifier
- CFE0001716, ucf:47301
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001716
- Title
- A Comparison Between Male Perpetrators Of Intimate Partner Violence and Child Sexual Abuse: A Feminist Perspective.
- Creator
-
Schafer, Christelle, Molina, Olga, Steen, Julie, Burg, Mary, Feder, Lynette, University of Central Florida
- Abstract / Description
-
The purpose of this study was to explore whether attributes of sex role identity and gender role stress differed between perpetrators of child sexual abuse (CSA) and perpetrators of intimate partner violence (IPV). The primary research question posed in the research sought to determine if participants' attitudes on gender role stereotyping or gender role stress were significantly different between perpetrators of CSA and perpetrators of IPV. Participants in this study were a convenience...
Show moreThe purpose of this study was to explore whether attributes of sex role identity and gender role stress differed between perpetrators of child sexual abuse (CSA) and perpetrators of intimate partner violence (IPV). The primary research question posed in the research sought to determine if participants' attitudes on gender role stereotyping or gender role stress were significantly different between perpetrators of CSA and perpetrators of IPV. Participants in this study were a convenience sample of adult males with histories of CSA and IPV from two different outpatient counseling programs. Participants completed the Bem Sex Role Inventory-Short Form (BSRI-SF) and the Male Gender Role Stress (MGRS) scales to investigate whether the gender role attributes and gender role stress scores of the perpetrators of CSA and IPV were (a) similar or different from each other and (b) whether they fell outside the norms established by the two standardized instruments. This study utilized multiple regression and one sample t-tests to analyze the data. There was a statistically significant relationship between perpetrator type and the BSRI-SF and MGRS scores. Additionally, perpetrators of CSA and IPV had lower scores on the MGRS scale than those men in previous research. Additional research was suggested to further explore the relationship between gender role stereotypes and gender role stress on the perpetration of CSA.
Show less - Date Issued
- 2013
- Identifier
- CFE0005056, ucf:49976
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005056
- Title
- A Comparison of Aluminum and Iron-based Coagulants for Treatment of Surface Water in Sarasota County, Florida.
- Creator
-
Yonge, David, Duranceau, Steven, Randall, Andrew, Cooper, Charles, University of Central Florida
- Abstract / Description
-
In this research, five different coagulants were evaluated to determine their effectiveness at removing turbidity, color and dissolved organic carbon (DOC) from a surface water in Sarasota County, Florida. Bench-scale jar tests that simulated conventional coagulation, flocculation, and sedimentation processes were used. Iron-based coagulants (ferric chloride and ferric sulfate) and aluminum-based coagulants (aluminum sulfate, polyaluminum chloride (PACl) and aluminum chlorohydrate (ACH)) were...
Show moreIn this research, five different coagulants were evaluated to determine their effectiveness at removing turbidity, color and dissolved organic carbon (DOC) from a surface water in Sarasota County, Florida. Bench-scale jar tests that simulated conventional coagulation, flocculation, and sedimentation processes were used. Iron-based coagulants (ferric chloride and ferric sulfate) and aluminum-based coagulants (aluminum sulfate, polyaluminum chloride (PACl) and aluminum chlorohydrate (ACH)) were used to treat a highly organic surface water supply (DOC ranging between 10 and 30 mg/L), known as the Cow Pen Slough, located within central Sarasota County, Florida. Isopleths depicting DOC and color removal efficiencies as a function of both pH and coagulant dose were developed and evaluated. Ferric chloride and ACH were observed to obtain the highest DOC (85% and 70%, respectively) and color (98% and 97%, respectively) removals at the lowest dose concentrations (120 mg/L and 100 mg/L, respectively). Ferric sulfate was effective at DOC removal but required a higher concentration of coagulant and was the least effective coagulant at removing color. The traditional iron-based coagulants and alum had low turbidity removals and they were often observed to add turbidity to the water. PACl and ACH had similar percent removals for color and turbidity achieving consistent percent removals of 95% and 45%, respectively, but PACl was less effective than ACH at removing organics. Sludge settling curves, dose-sludge production ratios, and settling velocities were determined at optimum DOC removal conditions for each coagulant. Ferric chloride was found to have the highest sludge settling rate but also produced the largest sludge quantities. Total trihalomethane formation potential (THMFP) was measured for the water treated with ferric chloride and ACH. As with DOC removal, ferric chloride yielded a higher percent reduction with respect to THMFP.
Show less - Date Issued
- 2012
- Identifier
- CFE0004621, ucf:49936
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004621
- Title
- A COMPARISON OF ANTHROPOMETRIC AND MAXIMAL STRENGTH MEASURES IN RUGBY UNION PLAYERS.
- Creator
-
Gamazo, Thomas, Fisher, Thomas, University of Central Florida
- Abstract / Description
-
To examine differences in body composition and maximal strength between collegiate (CLG) and men's club (CLB) rugby union players, as well as between the forward (FW) and back (BK) positions, seventeen resistance-trained men (24 ± 2.4 yrs; range: 20 - 27 yrs; 179.3 ± 5.4 cm; 93.7 ± 12.9kg) from a collegiate rugby team (n=11) and a local men's rugby club (n=6) were recruited to participate in the present investigation. Prior to strength testing, height (±0.1 cm), body mass (±0.1 kg), and body...
Show moreTo examine differences in body composition and maximal strength between collegiate (CLG) and men's club (CLB) rugby union players, as well as between the forward (FW) and back (BK) positions, seventeen resistance-trained men (24 ± 2.4 yrs; range: 20 - 27 yrs; 179.3 ± 5.4 cm; 93.7 ± 12.9kg) from a collegiate rugby team (n=11) and a local men's rugby club (n=6) were recruited to participate in the present investigation. Prior to strength testing, height (±0.1 cm), body mass (±0.1 kg), and body composition via dual energy x-ray absorptiometry were assessed to determine total percent body fat (%FAT), lean body mass (LBM), lean arm mass (LAM), and lean leg mass (LLM). Maximal upper- and lower-body strength were determined from each participant's one-repetition maximum (1RM) in the bench press and squat, respectively. Additionally, athletic history, resistance training experience, and distractors (e.g. work, school, and sleep) were determined via questionnaire. Significant ([less than]0.05) differences were observed between clubs in age (CLG: 22.3 ± 1.3y; CLB: 26.2 ± 1.1y), years played (CLG: 2.9 ± 2.4y; CLB: 7.5 ± 2.1y), and starting experience (CLG: 1.7 ± 2.6y; CLB: 5.2 ± 3.4y). In terms of position, LAM was significantly (p = 0.037) greater in FW (10.6 ± 1.7kg) than in BK (9.0 ± 0.5kg). These findings suggest rugby union players possess similar strength and size characteristics, regardless of age, playing experience, or position.
Show less - Date Issued
- 2014
- Identifier
- CFH0004687, ucf:45248
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004687
- Title
- A COMPARISON OF ATTENTIONAL RESERVE CAPACITY ACROSS THREE SENSORY MODALITIES.
- Creator
-
Brill, John, Gilson, Richard, University of Central Florida
- Abstract / Description
-
There are two theoretical approaches to the nature of attentional resources. One proposes a single, flexible pool of cognitive resources; the other poses there are multiple resources. This study was designed to systematically examine whether there is evidence for multiple resource theory using a counting task consisting of visual, auditory, and tactile signals using two experiments. The goal of the first experiment was the validation of a multi-modal secondary loading task. Thirty-two...
Show moreThere are two theoretical approaches to the nature of attentional resources. One proposes a single, flexible pool of cognitive resources; the other poses there are multiple resources. This study was designed to systematically examine whether there is evidence for multiple resource theory using a counting task consisting of visual, auditory, and tactile signals using two experiments. The goal of the first experiment was the validation of a multi-modal secondary loading task. Thirty-two participants performed nine variations of a multi-modal counting task incorporating three modalities and three demand levels. Performance and subjective ratings of workload were measured for each of the nine conditions of the within-subjects design. Significant differences were found on the basis of task demand level, irrespective of modality. Moreover, the perceived workload associated with the tasks differed by task demand level and not by modality. These results suggest the counting task is a valid means of imposing task demands across multiple modalities. The second experiment used the same counting task as a secondary load to a primary visual monitoring task, the system monitoring component of the Multi-Attribute Task Battery (MATB). The experimental conditions consisted of performing the system monitoring task alone as a reference and performing system monitoring combined with visual, auditory, or tactile counting. Thirty-one participants were exposed to all four experimental conditions in a within-subjects design. Performance on the primary and secondary tasks was measured, and subjective workload was assessed for each condition. Participants were instructed to maintain performance on the primary task, irrespective of condition, which they did so effectively. Secondary task performance for the visual-auditory and visual-tactile conditions was significantly better than for the visual-visual dual task condition. Subjective workload ratings were also consistent with the performance measures. These results clearly indicate that there is less interference for cross-modal tasks than for intramodal tasks. These results add evidence to multiple resource theory. Finally, these results have practical implications that include human performance assessment for display and alarm development, assessment of attentional reserve capacity for adaptive automation systems, and training.
Show less - Date Issued
- 2007
- Identifier
- CFE0001660, ucf:47234
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001660
- Title
- A COMPARISON OF CHARACTER EDUCATION PROGRAMS AND THEIR EFFECTS ON ACADEMIC ACHIEVEMENT, BEHAVIOR, AND ATTENDANCE.
- Creator
-
Berger, Beth, Murray, Barbara, University of Central Florida
- Abstract / Description
-
The purpose of this study was to determine whether significant relationships existed between character education and the number of incidents of crimes and violence, attendance rates, and academic achievement in Florida public schools. Proponents of character education such as Lickona (1991) and Murphy (1998) posited that there was a positive correlation between teaching and practicing the six pillars of character education, and student achievement, and increased attendance. They also posited...
Show moreThe purpose of this study was to determine whether significant relationships existed between character education and the number of incidents of crimes and violence, attendance rates, and academic achievement in Florida public schools. Proponents of character education such as Lickona (1991) and Murphy (1998) posited that there was a positive correlation between teaching and practicing the six pillars of character education, and student achievement, and increased attendance. They also posited that there was a negative correlation between character education and incidents of crime and violence. The researcher acquired data in an attempt to determine whether or not the views of Lickona (1991), Murphy (1998) and others holding this view would yield similar results in the Florida public schools. The theoretical framework for the study was Kohlberg's cognitive-developmental theory of moral reasoning. The study was compiled between 2003 and 2004 based on data for the 1998-1999 school year and the 2002-2003 school year. These dates were chosen because they were the pre-implementation year (1998-1999) and four years after the character education mandate went into effect. Data from 67 Florida counties were solicited and 10 counties selected as samples of effective character education implementers and non-effective character education implementers in their elementary schools. Utilizing Statistical Package for Social Science (2004), data were analyzed for statistically significant relationships in order to confirm or negate the null hypotheses. The tests utilized were repeated measures ANOVAs. The study found a statistically significant relationship between those counties that effectively implemented a character education program in their elementary schools and student attendance, as compared to counties that did not effectively implement a character education program in their elementary schools. The study did not find a statistically significant relationship between those counties that effectively implemented a successful character education program in their elementary schools and student achievement, as compared to counties that did not effectively implement a character education program in their elementary schools. The study did not find a statistically significant relationship between those counties that effectively implemented a successful character education program in their elementary schools and lowered incidents of crime and violence, as compared to counties that did not effectively implement a character education program in their elementary schools. In all school districts studied, however, over the four-year period incidents of crime and violence were reduced, the absenteeism rate was reduced, and achievement had increased. This could have been due to the implementation of any type of character education program or it may have been due to other programs implemented in the Florida schools.
Show less - Date Issued
- 2005
- Identifier
- CFE0000333, ucf:46283
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000333
- Title
- A COMPARISON OF COLLEGE STUDENTS' PERCEPTIONS OF OLDER TATTOOED WOMEN AND YOUNGER TATTOOED WOMEN.
- Creator
-
Raymond, Laura, Musambira, George, University of Central Florida
- Abstract / Description
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The study examined how college students perceive older versus younger women based on their tattoo status (i.e., no tattoo, feminine tattoo, or masculine tattoo). A randomly assigned sample of 376 responded to a survey involving a 2 X 3 experiment designed to assess the impact of age (older versus younger) and tattoo status on four dependent measures: credibility, promiscuity, and attractiveness. Results indicate that older and younger women are perceived differently depending on their tattoo...
Show moreThe study examined how college students perceive older versus younger women based on their tattoo status (i.e., no tattoo, feminine tattoo, or masculine tattoo). A randomly assigned sample of 376 responded to a survey involving a 2 X 3 experiment designed to assess the impact of age (older versus younger) and tattoo status on four dependent measures: credibility, promiscuity, and attractiveness. Results indicate that older and younger women are perceived differently depending on their tattoo status. Not wearing a tattoo may lead to a more favorable perception of older women than wearing one, but wearing a feminine tattoo may engender a more favorable impression of older women than having a masculine tattoo. In contrast, avoiding to wear a tattoo may not be as helpful for the perception of younger women as it is for older women. Also, while younger women may be rewarded for gender role transgression with respect to tattoo status this is not so for older women.
Show less - Date Issued
- 2011
- Identifier
- CFE0003971, ucf:48658
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003971
- Title
- A COMPARISON OF COMPUTER AND TRADITIONAL FACE-TO-FACE CLASSROOM ORIENTATION FOR BEGINNING CRITICAL CARE NURSES.
- Creator
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Anzalone, Patricia, Sole, Mary Lou, University of Central Florida
- Abstract / Description
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Purpose: Education of the novice critical care nurse has traditionally been conducted by critical care educators in face-to-face classes in an orientation or internship. A shortage of qualified educators and growth in electronic modes of course delivery has led organizations to explore electronic learning (e-learning) to provide orientation to critical care nursing concepts. Equivalence of e-learning versus traditional critical care orientation has not been studied. The primary aim of this...
Show morePurpose: Education of the novice critical care nurse has traditionally been conducted by critical care educators in face-to-face classes in an orientation or internship. A shortage of qualified educators and growth in electronic modes of course delivery has led organizations to explore electronic learning (e-learning) to provide orientation to critical care nursing concepts. Equivalence of e-learning versus traditional critical care orientation has not been studied. The primary aim of this study was to examine the equivalency of knowledge attainment in the cardiovascular module of the Essentials of Critical Care Orientation (ECCO) e-learning program to traditional face-to-face critical care orientation classes covering the same content. Additional aims were to determine if learning style is associated with a preference for type of learning method, and to determine any difference in learning satisfaction between the two modalities. Methods: The study was conducted using a two-group pretest-posttest experimental design. Forty-one practicing volunteer nurses with no current critical care experience living in southwest Florida were randomly assigned to either the ECCO (n=19) or face-to-face (n=22) group. Those in the face-to-face group attended 20 hours of classroom instruction taught by an expert educator. Those in the ECCO group completed the lessons on line and had an optional 2 hour face-to-face discussion component. Pre-test measures included the Basic Knowledge Assessment Test (BKAT-7), modified ECCO Cardiovascular (CV) Examination, and Kolb Learning Style Inventory (LSI). Post-tests included the BKAT-7, modified CV Examination, and Affective Measures Survey. Results: The majority of subjects were female, married, and educated at the associate degree level. Their mean age was 39.5 + 12 years, and they averaged 9.9 + 11.7 years of nursing experience. The diverging learning style was assessed in 37% of subjects. Classroom instruction was preferred by 61% of participants. No statistical differences were noted between groups on any demographic variables or baseline knowledge. Learning outcomes were compared by repeated measures analysis of variance. Mean scores of subjects in both groups increased statistically on both the BKAT-7 and modified CV Examination (p=<.01); however, no significant differences (p> .05) were found between groups. Preference for online versus classroom instruction was not associated with learning style (X2 = 3.39, p = .34). Satisfaction with learning modality was significantly greater for those in the classroom group (t=4.25, p=.000). Discussion/Implications: This is the first study to evaluate the ECCO orientation program and contributes to the growing body of knowledge exploring e-learning versus traditional education. The results of this study provide evidence that the ECCO critical care education produces learning outcomes at least equivalent to traditional classroom instruction, regardless of the learning style of the student. As participant satisfaction was more favorable toward the classroom learning modality, consideration should be given to providing blended learning if using computer-based orientation programs. Replication of this study with a variety of instructors in varied geographic locations, expanded populations, larger samples, and different subject matter is recommended.
Show less - Date Issued
- 2008
- Identifier
- CFE0002192, ucf:47888
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002192
- Title
- A Comparison of Concurrent Correctness Criteria for Shared Memory Based Data Structure.
- Creator
-
Bhattacharya, Dipanjan, Dechev, Damian, Leavens, Gary, Bassiouni, Mostafa, University of Central Florida
- Abstract / Description
-
Developing concurrent algorithms requires safety and liveness to be defined in order to understand their proper behavior. Safety refers to the correctness criteria while liveness is the progress guarantee. Nowadays there are a variety of correctness conditions for concurrent objects. The way these correctness conditions differ and the various trade-offs they present with respect to performance, usability, and progress guarantees is poorly understood. This presents a daunting task for the...
Show moreDeveloping concurrent algorithms requires safety and liveness to be defined in order to understand their proper behavior. Safety refers to the correctness criteria while liveness is the progress guarantee. Nowadays there are a variety of correctness conditions for concurrent objects. The way these correctness conditions differ and the various trade-offs they present with respect to performance, usability, and progress guarantees is poorly understood. This presents a daunting task for the developers and users of such concurrent algorithms who are trying to better understand the correctness of their code and the various trade-offs associated with their design choices and use. The purpose of this study is to explore the set of known correctness conditions for concurrent objects, find their correlations and categorize them, and provide insights regarding their implications with respect to performance and usability. In this thesis, a comparative study of Linearizability, Sequential Consistency, Quiescent Consistency and Quasi Linearizability will be presented using data structures like FIFO Queues, Stacks, and Priority Queues, and with a case study for performance of these implementations using different correctness criteria.
Show less - Date Issued
- 2016
- Identifier
- CFE0006263, ucf:51046
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006263
- Title
- A Comparison of Corrosion Rates Determined by Polarizations Resistance Measurements for Zinc and Cadmium Metal Immersed in NonStirred Aqueous Portland Cement Solution.
- Creator
-
Moore, William J., Baldwin, Vaniah, Jr., Engineering
- Abstract / Description
-
Florida Technological University College of Engineering Thesis; The effect of nonstirred aqueous portland cement solution on the corrosion rates of zinc and cadmium metal using Tafel extropolation and linear polarization measurements has been investigated. Results indicate that for the corrosion systems under investigation, zinc metal has a higher corrosion potential and lower corrosion rate than cadmium metal.
- Date Issued
- 1975
- Identifier
- CFR0008129, ucf:52969
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0008129
- Title
- A comparison of eighth grade athletes and non-athletes: Academic achievement, time spent on homework, future educational goals, and socioeconomic status.
- Creator
-
Shelby, John, Taylor, Rosemarye, Hahs-Vaughn, Debbie, Doherty, Walter, Ford, Robert, University of Central Florida
- Abstract / Description
-
This study examined the differences between eighth grade athletes and non-athletes in terms of mathematics and reading achievement based on standardized test scores from direct cognitive assessments in mathematics and reading. The data for this study came from the Early Childhood Longitudinal Study Kindergarten Class of 1998-1999 (ECLS-K). Data were collected from student and parent surveys in conjunction with direct cognitive assessments. The research questions were as follows: 1. To what...
Show moreThis study examined the differences between eighth grade athletes and non-athletes in terms of mathematics and reading achievement based on standardized test scores from direct cognitive assessments in mathematics and reading. The data for this study came from the Early Childhood Longitudinal Study Kindergarten Class of 1998-1999 (ECLS-K). Data were collected from student and parent surveys in conjunction with direct cognitive assessments. The research questions were as follows: 1. To what extent is there a difference in mathematics achievement between eighth grade athletes and non-athletes while controlling for self-reported future educational goals and socioeconomic status?2. To what extent is there a difference in mathematics achievement between eighth grade athletes and non-athletes while controlling for self-reported weekly time spent on homework and socioeconomic status?3. To what extent is there a difference in reading achievement between eighth grade athletes and non-athletes while controlling for self-reported future educational goals and socioeconomic status?4. To what extent is there a difference in reading achievement between eighth grade athletes and non-athletes while controlling for self-reported weekly time spent on homework and socioeconomic status?Factorial ANOVA's were used answer each research question. An additional variable, gender, was utilized to further evaluate differences in mathematics and reading scale scores. Based upon the results, no statistical significance was found in the three-way interaction effects for any of the research questions. As the two-way and main effects comparisons were evaluated, statistical significance was indicated within each question based on the multiple independent variables. Overall, the athletes did not outscore non-athletes.There were consistent differences in mean scores in reading and mathematics based upon self-stated future educational goals where students maintained higher mean scores in reading and mathematics as their educational goals increased. In addition consistent differences in mean scores in reading and mathematics were indicated where students below the poverty level had lower mean scores than students at or above the poverty level. Finally, students' mathematics and reading achievement significantly increased as their self-reported weekly time spent on homework increased.
Show less - Date Issued
- 2011
- Identifier
- CFE0004166, ucf:49064
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004166