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- Title
- A HEALTHY PREGNANCY CURRICULUM FOR ADOLESCENT MOTHERS: PARTICIPANTS' PERCEPTIONS AND EFFECTS ON INFANTS' BIRTH WEIGHT.
- Creator
-
Konjoian, Rae, Allen, Kay, University of Central Florida
- Abstract / Description
-
The purpose of this study was to determine if there are differences in birth weight of infants, tobacco use during pregnancy, and Apgar scores of infants between pregnant adolescents who successfully complete a healthy pregnancy curriculum and those who do not and to further examine the adolescent mothers' perceptions of the major concepts included in a healthy pregnancy curriculum. The study involved the collection and analysis of retrospective data to determine differences in birth weight...
Show moreThe purpose of this study was to determine if there are differences in birth weight of infants, tobacco use during pregnancy, and Apgar scores of infants between pregnant adolescents who successfully complete a healthy pregnancy curriculum and those who do not and to further examine the adolescent mothers' perceptions of the major concepts included in a healthy pregnancy curriculum. The study involved the collection and analysis of retrospective data to determine differences in birth weight of infants, tobacco use during pregnancy, and Apgar scores of infants. Additionally, a questionnaire, focus group discussions, and follow-up interviews were conducted with former students of the healthy pregnancy curriculum to examine the adolescent mothers' perceptions of the major concepts in the healthy pregnancy curriculum. The participants answered questions regarding how important they thought each major concept is for inclusion in the healthy pregnancy curriculum, how much they learned about each major concept, and how helpful that information was in their own experiences. Analyses of the data did not show statistical differences between adolescents who successfully completed a healthy pregnancy curriculum and those who did not complete a healthy pregnancy curriculum regarding differences in birth weight of infants, tobacco use during pregnancy, and Apgar scores of infants. These findings of non-significance may be due to the small number of participants (n=50), non-participants (n=149), and the limited duration of the study data (1999 to 2003). A larger population over a longer period of time might yield different results. The findings from the qualitative data provided by the seven former students suggest that pregnant adolescents who successfully complete the class perceive the components of the healthy pregnancy curriculum as valuable and important. Topics that were indicated as particularly important were The Birth Process, Nutrition, Decision Making, and Family Planning. Participants further indicated changes in their attitudes for all ten topics and changes in behaviors in the areas of Human Reproduction, Nutrition, Health-Care Practices, Environmental Effects on the Unborn Baby, and Decision Making.
Show less - Date Issued
- 2005
- Identifier
- CFE0000470, ucf:46356
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000470
- Title
- A HEDONIC ANALYSIS OF THE EFFECT OF EXPERT WINE RATINGS ON PRICE AND RETAILER PROFITS.
- Creator
-
Neill, Kaitlin, Caputo, Michael, University of Central Florida
- Abstract / Description
-
During the last few decades, economists have become interested in the wine industry and several of them have focused on the determinants of price. One characteristic that has been identified as an important determinant is expert wine ratings. Much of the previous research on this topic has focused on relating expert grades to the retail price of wine. Using proprietary data, this paper will test whether these grades influence retail prices as well as retailer profits and wholesale pricing. By...
Show moreDuring the last few decades, economists have become interested in the wine industry and several of them have focused on the determinants of price. One characteristic that has been identified as an important determinant is expert wine ratings. Much of the previous research on this topic has focused on relating expert grades to the retail price of wine. Using proprietary data, this paper will test whether these grades influence retail prices as well as retailer profits and wholesale pricing. By analyzing an individual wholesale firm in South Florida and their distribution network, this paper determines the effect expert ratings have on these dependent variables. Empirical evidence confirms that expert ratings have a positive effect on wholesale and retail wine prices and that they exhibit a parallel influence on retailer profits. This thesis aims to contribute new information to aid both the end consumers purchasing decisions as well as busi-ness pricing strategies.
Show less - Date Issued
- 2011
- Identifier
- CFH0004129, ucf:44879
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004129
- Title
- A hermeneutic study of secondary English Language Arts teacher candidates' writing instruction experiences in ESOL methods courses.
- Creator
-
Bello, Paula, Olan, Elsie, Nutta, Joyce, Hopp, Carolyn, Mihai, Florin, University of Central Florida
- Abstract / Description
-
The purpose of this hermeneutic study was to understand, describe and interpret secondary English Language Arts (ELA) teacher candidates'(TC) experiences with writing instruction while attending English for Speakers of Other Languages (ESOL) methods courses. The study included a purposeful convenience sample of 15 (fifteen) secondary ELA teacher candidates' (TC) attending 4 (four) different sections in 2 (two) ESOL methods courses. TCs were invited to participate in inquiry driven activities...
Show moreThe purpose of this hermeneutic study was to understand, describe and interpret secondary English Language Arts (ELA) teacher candidates'(TC) experiences with writing instruction while attending English for Speakers of Other Languages (ESOL) methods courses. The study included a purposeful convenience sample of 15 (fifteen) secondary ELA teacher candidates' (TC) attending 4 (four) different sections in 2 (two) ESOL methods courses. TCs were invited to participate in inquiry driven activities including written reflections in response to a literacy questionnaire, oral interviews responding to open-ended questions and focus/work groups' discussions, which allowed them to reflect about their past and present literacy and learning experiences and become reflexive about the application of knowledge and practices in their future classrooms. The phenomenological hermeneutic qualitative design granted the researcher insight into participants' literacy and learning experiences as lived in relationship with their contexts, in a specific place and time.Colaizzi's (1978) seven-stages data analysis procedure, enabled the analysis and thorough description of TCs' experiences with writing instruction along their schooling and teacher education career. The following thematic categorization of participants' experiences was outlined: a)- TCs' experiences with instruction received and knowledge developed in teacher education programs, b)- TCs' recognition of good and bad practices in educational settings, including planning accommodations in general education classrooms, c)- TCs' experiences with ELs in authentic settings, d)- TCs' awareness process of ELs in schools, and e)- TCs' experiences with and about writing instruction to teach ELs.Further in depth data analysis guided the researcher into the interpretation of the fundamental structure of the phenomenon of teacher education experiences with writing instruction. TCs' experiences, drawn from different learning settings (including methods and content courses and field practicum), were articulated thanks to their participation in inquiry based learning activities. This breath of experiences specifically informed TCs' writing instruction experiences while attending ESOL methods courses. TCs' reflective and reflexive stances position them at the center of the educational phenomenon, in which TCs develop from facilitators of classroom communication to facilitators of learning processes and intercultural mediators.The phenomenon of TCs' lived experiences with writing instruction while attending ESOL methods courses, and by extension, content area courses and field practicum, needs to be analyzed, described and interpreted in order to develop practices conducive to inform the curricular development of teacher education programs and courses, to better prepare TCs to teach every learner develop knowledge and literacy, paying special attention to ELs'proficiency in English as a second language (ESL).?
Show less - Date Issued
- 2016
- Identifier
- CFE0006681, ucf:51904
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006681
- Title
- A high-content multiplexed screening platform for the evaluation and manipulation of force and fatigue of adult derived skeletal muscle myotubes in defined serum-free medium.
- Creator
-
McAleer, Christopher, Hickman, James, Ebert, Steven, Perez Figueroa, J. Manuel, Lambert, Stephen, University of Central Florida
- Abstract / Description
-
The overall focus of this project has two parts: First, was to develop a protocol utilizing serum-free media formulations and defined plating and culture techniques to create functional in vitro myotubes derived from adult skeletal muscle satellite cells. The second was to manipulate the inherent muscle parameters such as force output and fatigue of these myotubes by employing exercise regimes or by small molecule application. The importance of serum-free medium use for in vitro cultures is...
Show moreThe overall focus of this project has two parts: First, was to develop a protocol utilizing serum-free media formulations and defined plating and culture techniques to create functional in vitro myotubes derived from adult skeletal muscle satellite cells. The second was to manipulate the inherent muscle parameters such as force output and fatigue of these myotubes by employing exercise regimes or by small molecule application. The importance of serum-free medium use for in vitro cultures is becoming increasingly important in creating functional systems that can be validated for drug testing by the Food and Drug Administration (FDA). Also, the study of age related diseases as well as the potential for (")personalized medicine(") relies on the proliferation and maturation of satellite cells from adult derived tissue. For that purpose, a serum-free medium and culture system was designed to create mature striated myotubes in culture on a defined non-biological substrate N-1[3-trimethoxysilyl propyl] diethylenetriamine (DETA). These myotubes were evaluated by morphology, muscle specific protein expression, and by muscle functionality. After the thorough characterization of the resultant myotubes the functional output of the muscle was altered utilizing chemical means (creatine supplementation and PGC-1? agonists), chronic long term stimulation, and the use of PGC-1? deficient tissue. In this thesis presentation the utility of the newly developed medium formulation to create myotubes from a variety of adult derived muscle sources will be shown. A protocol in which to exercise skeletal muscle in vitro to alter endurance was developed and employed to manipulate skeletal muscle. Finally, small molecules were tested to validate this system for drug study use. This engineered system has the potential for high-throughput screening of drugs for efficacy and drug toxicity studies as well as general biological studies on muscle fatigue.
Show less - Date Issued
- 2015
- Identifier
- CFE0005660, ucf:50162
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005660
- Title
- A HIGH-RESOLUTION STORM SURGE MODEL FOR THE PASCAGOULA REGION, MISSISSIPPI.
- Creator
-
Takahashi, Naeko, Hagen, Scott, University of Central Florida
- Abstract / Description
-
The city of Pascagoula and its coastal areas along the United States Gulf Coast have experienced many catastrophic hurricanes and were devastated by high storm surges caused by Hurricane Katrina (August 23 to 30, 2005). The National Hurricane Center reported high water marks exceeding 6 meters near the port of Pascagoula with a near 10-meter high water mark recorded near the Hurricane Katrina landfall location in Waveland, MS. Although the Pascagoula River is located 105 km east of the...
Show moreThe city of Pascagoula and its coastal areas along the United States Gulf Coast have experienced many catastrophic hurricanes and were devastated by high storm surges caused by Hurricane Katrina (August 23 to 30, 2005). The National Hurricane Center reported high water marks exceeding 6 meters near the port of Pascagoula with a near 10-meter high water mark recorded near the Hurricane Katrina landfall location in Waveland, MS. Although the Pascagoula River is located 105 km east of the landfall location of Hurricane Katrina, the area was devastated by storm surge-induced inundation because of its low elevation. Building on a preliminary finite element mesh for the Pascagoula River, the work presented herein is aimed at incorporating the marsh areas lying adjacent to the Lower Pascagoula and Escatawpa Rivers for the purpose of simulating the inland inundation which occurred during Hurricane Katrina. ADCIRC-2DDI (ADvanced CIRCulation Model for Shelves, Coasts and Estuaries, Two-Dimensional Depth Integrated) is employed as the hydrodynamic circulation code. The simulations performed in this study apply high-resolution winds and pressures over the 7-day period associated with Hurricane Katrina. The high resolution of the meteorological inputs to the problem coupled with the highly detailed description of the adjacent inundation areas will provide an appropriate modeling tool for studying storm surge dynamics within the Pascagoula River. All simulation results discussed herein are directed towards providing for a full accounting of the hydrodynamics within the Pascagoula River in support of ongoing flood/river forecasting efforts. In order to better understand the hydrodynamics within the Pascagoula River when driven by an extreme storm surge event, the following tasks were completed as a part of this study: 1) Develop an inlet-based floodplain DEM (Digital Elevation Model) for the Pascagoula River. The model employs topography up to the 1.5-meter contour extracted from the Southern Louisiana Gulf Coast Mesh (SL15 Mesh) developed by the Federal Emergency Management Agency (FEMA). 2) Incorporate the inlet-based floodplain model into the Western North Atlantic Tidal (WNAT) model domain, which consists of the Gulf of Mexico, the Caribbean Sea, and the entire portion of the North Atlantic Ocean found west of the 60 degree West meridian, in order to more fully account for the storm surge dynamics occurring within the Pascagoula River. This large-scale modeling approach will utilize high-resolution wind and pressure fields associated with Hurricane Katrina, so that storm surge hydrographs (elevation variance) at the open-ocean boundary locations associated with the localized domain can be adequately obtained. 3) Understand the importance of the various meteorological forcings that are attributable to the storm surge dynamics that are setup within the Pascagoula River. Different implementations of the two model domains (large-scale, including the WNAT model domain; localized, with its focus concentrated solely on the Pascagoula River) will involve the application of tides, storm surge hydrographs and meteorological forcing (winds and pressures) in isolation (i.e., as the single forcing mechanism) and collectively (i.e., together in combination). The following conclusions are drawn from the research presented in this thesis: 1) Incorporating the marsh areas into the preliminary in-bank mesh provides for significant improvement in the astronomic tide simulation; 2) the large-scale modeling approach (i.e., the localized floodplain mesh incorporated into the WNAT model domain) is shown to be most adequate towards simulating storm surge dynamics within the Pascagoula River. Further, we demonstrate the utility of the large-scale model domain towards providing storm surge hydrographs for the open-ocean boundary of the localized domain. Only when the localized domain is forced with the storm surge hydrograph (generated by the large-scale model domain) does it most adequately capture the full behavior of the storm surge. Finally, we discover that while the floodplain description up to the 1.5-m contour greatly improves the model response by allowing for the overtopping of the river banks, a true recreation of the water levels caused by Hurricane Katrina will require a floodplain description up to the 5-m contour.
Show less - Date Issued
- 2008
- Identifier
- CFE0002476, ucf:47719
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002476
- Title
- A HISTORICAL ANALYSIS OF TEACHER PREPARATION PROGRAM CONTENTBEGINNING WITH TEACHER NORMAL COLLEGES IN 1839 THROUGHSCHOOL DISTRICT ALTERNATIVE CERTIFICATION PROGRAMS IN 2007.
- Creator
-
Helton, Julie, Murray, Barbara, University of Central Florida
- Abstract / Description
-
The purpose of this study was to explore teacher preparation program content throughout American history in order to determine trends in programs of study, specifically including coursework in education foundations, teaching methods involving the behavioral sciences, and subject area content. These categories were selected because their content is responsible for teachers' working knowledge of their subject area, as well as student learning, behavior management and motivation. The study...
Show moreThe purpose of this study was to explore teacher preparation program content throughout American history in order to determine trends in programs of study, specifically including coursework in education foundations, teaching methods involving the behavioral sciences, and subject area content. These categories were selected because their content is responsible for teachers' working knowledge of their subject area, as well as student learning, behavior management and motivation. The study also examined documented teacher knowledge voids: student behavior management, time management, organization, dealing with parents, motivating students, and meeting individual students' needs to determine which aspects of teacher education could improve teachers' skills in these areas. Programs of study from traditional and alternative teacher preparation programs were gathered from Massachusetts, Indiana, Tennessee, California and Florida in an effort to research across the United States. Traditional programs were defined as four or five-year teacher education programs in colleges or universities which began as teacher normal schools and in those that did not. Program components from 1839 through 2007 were analyzed using Thinking Maps® for organizing and interpreting the information while focusing on education foundations, teaching methods, or subject area content gaps which would correlate to teacher knowledge voids. Patterns were traced within teacher education programs focusing on the art or science of teaching. Trends in course offerings were investigated and linked to concurrent events which may have influenced them. The following results were obtained from this research. American teacher preparation programs began in 1839 with elements of teaching methods, subject area content and education foundations, which remained the common elements in 2007. The ratio of each element in teacher preparation programs fluctuated throughout history. The dissent over teaching as an art or a science was evident in the early years of teacher normal schools, and the argument continued in 2007, largely affected by the absence of a clear definition of either approach. Early teacher normal schools admitted that teacher education programs were "imperfect preparation" for the classroom, and teacher knowledge voids remained an issue in 2007. From the inception of common schools in America, there was a shortage of teachers to fill them, and the teacher shortage continued in 2007, which may have contributed to the vast difference in teacher education program composition. An avenue taken to alleviate the teacher shortage issue was alternative teacher certification. Alternative certification programs were enacted in the 1800s, and alternative certification programs were widely used in 2007.
Show less - Date Issued
- 2008
- Identifier
- CFE0002139, ucf:47926
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002139
- Title
- A Historical Analysis of the Evolution of the Administrative and Organizational Structure of the University of Central Florida as it Relates to Growth.
- Creator
-
Lindsley, Boyd, Murray, Barbara, Doherty, Walter, Murray, Kenneth, Dziuban, Charles, University of Central Florida
- Abstract / Description
-
This was a qualitative historical study, which was recounted chronologically and organized around the terms of the four full-time presidents of the university. The review addressed the processes associated with the establishment and development of Florida Technological University beginning in 1963 through its name change to the University of Central Florida in 1979, concluding in 2013. The organization's mission, vision, and goals, how they evolved and the impact they had on the university...
Show moreThis was a qualitative historical study, which was recounted chronologically and organized around the terms of the four full-time presidents of the university. The review addressed the processes associated with the establishment and development of Florida Technological University beginning in 1963 through its name change to the University of Central Florida in 1979, concluding in 2013. The organization's mission, vision, and goals, how they evolved and the impact they had on the university were of particular interest. The study was focused on the administrative actions and organizational changes that took place within the university to assist faculty in teaching, research, and service as well as external conditions and events which impacted the university and shaped its development. The growth of the university, as well as the productivity of the faculty, were of interest in the study.
Show less - Date Issued
- 2015
- Identifier
- CFE0005650, ucf:50187
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005650
- Title
- A HISTORICAL VIEW OF CUBAN IMMIGRATION POLICY.
- Creator
-
Castro, Sarah, Naccarato-Fromang, Gina, University of Central Florida
- Abstract / Description
-
Cuba is a communist country an estimated population of 11,075,244(2013), Cuba is located about ninety-three miles south of Key West, Florida. Cuba has been ruled by the communist regime of Fidel Castro, and now his younger brother Raul Castro. For over fifty years this regime has forced a major increase in the amount of people migrating to the United States. The regime has been disregarding basic human rights for decades and oppressing Cuba's citizens. Hundreds of thousands of Cubans have...
Show moreCuba is a communist country an estimated population of 11,075,244(2013), Cuba is located about ninety-three miles south of Key West, Florida. Cuba has been ruled by the communist regime of Fidel Castro, and now his younger brother Raul Castro. For over fifty years this regime has forced a major increase in the amount of people migrating to the United States. The regime has been disregarding basic human rights for decades and oppressing Cuba's citizens. Hundreds of thousands of Cubans have come to the United States using boats, rafts, or any means available. The Cuban Adjustment Act of 1966 (amended in 1994 to contain the Wet Foot, Dry Foot Policy) states that if Cubans trying to reach the United States are intercepted at sea, they will be sent back to Cuba, or a third country. If they make it to United States soil, they will have the chance to start the journey to becoming citizens of the United States. Many Cubans die at sea trying to reach the United States for this chance at citizenship. There have been attempts to implement immigration policy in the past. President Obama is now trying to reform current immigration laws. What effects could a new immigration policy have on Cuban immigration versus the legislation put forth in the past? This study will be an examination and analysis of past and Cuban immigration policy and issues. This research paper utilizes government websites, news articles, presidential addresses, books and various sources to address this question. My hope is that this study will help to explain the impact past policies and reform had on Cuban immigration, and the impact proposed policy and current issues may have in the future.
Show less - Date Issued
- 2013
- Identifier
- CFH0004517, ucf:45215
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004517
- Title
- A History of the Lutherans in the Orlando Area, 1868-1948.
- Creator
-
Prahlow, James D., Wehr, Paul W., Arts and Sciences
- Abstract / Description
-
University of Central Florida College of Arts and Sciences Thesis
- Date Issued
- 1985
- Identifier
- CFR0011602, ucf:53039
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFR0011602
- Title
- A Holistic Analysis of the Long-Term Challenges (&) Potential Benefits of the Green Roof, Solar PV Roofing, and GRIPV Roofing Markets in Orlando, Florida.
- Creator
-
Kelly, Carolina, Tatari, Omer, Oloufa, Amr, Mayo, Talea, Zheng, Qipeng, University of Central Florida
- Abstract / Description
-
Green roofs and roof-mounted solar PV arrays have a wide range of environmental and economic benefits, including significantly longer roof lifetimes, reductions in urban runoff, mitigation of the urban heat island (UHI) effect, reduced electricity demand and energy dependence, and/or reduced emissions of greenhouse gases (GHGs) and other harmful pollutants from the electricity generation sector. Consequently, green roofs and solar panels have both become increasingly popular worldwide, and...
Show moreGreen roofs and roof-mounted solar PV arrays have a wide range of environmental and economic benefits, including significantly longer roof lifetimes, reductions in urban runoff, mitigation of the urban heat island (UHI) effect, reduced electricity demand and energy dependence, and/or reduced emissions of greenhouse gases (GHGs) and other harmful pollutants from the electricity generation sector. Consequently, green roofs and solar panels have both become increasingly popular worldwide, and promising new research has emerged for their potential combination in Green Roof Integrated Photovoltaic (GRIPV) roofing applications. However, due to policy resistance, these alternatives still have marginal market shares in the U.S., while GRIPV research and development is still severely limited today. As a result, these options are not yet sufficiently widespread in the United States as to realize their full potential, particularly due to a variety of policy resistance effects with respect to each specific alternative. The steps in the System Dynamics (SD) methodology to be used in this study are summarized as follows. First, based on a comprehensive review of relevant literature, a causal loop diagram (CLD) will be drawn to provide a conceptual illustration of the modeled system. Second, based on the feedback relationships observed in this CLD, a stock-flow diagram (SFD) will be developed to form a quantitative model. Third, the modeled SFD will be tested thoroughly to ensure its structural and behavioral validity with respect to the modeled system in reality using whatever real world data is available. Fourth, different policy scenarios will be simulated within the model to evaluate their long-term effectiveness. Fifth, uncertainty analyses will be performed to evaluate the inherent uncertainties associated with the analyses in this study. Finally, the results observed for the analyses in this study and possible future research steps will be discussed and compared as appropriate.
Show less - Date Issued
- 2018
- Identifier
- CFE0007406, ucf:52741
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007406
- Title
- A Holistic Framework for Effective Engineering Leadership Development Using 3D Virtual World Simulation.
- Creator
-
Almalki, Hamed, Rabelo, Luis, Elshennawy, Ahmad, Lee, Gene, Ferreras, Ana, University of Central Florida
- Abstract / Description
-
Problems associated with the limited success of traditional engineering leadership development are the absence of embedded real-life industry case studies in leadership development and incorrect applications of leadership strategies in the various contexts. Though recommended programs for enhancing leadership development exist, they lack an examined framework, especially when it comes to leadership development of undergraduate engineering students. In this research effort, the impact of a...
Show moreProblems associated with the limited success of traditional engineering leadership development are the absence of embedded real-life industry case studies in leadership development and incorrect applications of leadership strategies in the various contexts. Though recommended programs for enhancing leadership development exist, they lack an examined framework, especially when it comes to leadership development of undergraduate engineering students. In this research effort, the impact of a framework using 3D virtual world simulation and the 4-D Leadership System to enhance the leadership abilities of undergraduate engineering students at the individual and team levels based on industrial leadership case studies was investigated. The 3D virtual world simulation was used to provide experiential learning by replacing human beings with avatars that could be managed or dramatized by real people. This framework was examined and validated by a randomized pretest-posttest control group design. Paired and two-sample t-tests revealed a significant development in the average team leadership skills of the experimental group, but no significant change occurred in the control group teams. There was a reduction in the mean of individuals' tests which indicated there was a small enhancement in an individual's leadership skills; however, the change was small and not statistically significant. Also, the administration of the 3D virtual world leadership simulation on the undergraduate engineering students had a significant effect on a team's average leadership skills. There was a small, but insignificant effect of the 3D virtual world simulation for individuals. The findings of the study supported simulation as having potential to strengthen the leadership development of undergraduate engineering students, thereby preparing them to meet industry's demands for engineering leadership.
Show less - Date Issued
- 2016
- Identifier
- CFE0006248, ucf:51087
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006248
- Title
- A Holistic Framework for Transitional Management.
- Creator
-
Elattar, Ahmed, Rabelo, Luis, Pazour, Jennifer, Mollaghasemi, Mansooreh, Ajayi, Richard, University of Central Florida
- Abstract / Description
-
For all business organizations, there comes a time when a change must take place within their eco-system. It consumes a great deal of thought and planning to ensure that the right decision is made as it could alter the entire course of their business for a number of years to come. This change may appear in the form of a brilliant CEO reaching the age of retirement, or an unsuccessful Managing Director being asked to leave before fulfilling the term of her contract. Regardless of the cause, a...
Show moreFor all business organizations, there comes a time when a change must take place within their eco-system. It consumes a great deal of thought and planning to ensure that the right decision is made as it could alter the entire course of their business for a number of years to come. This change may appear in the form of a brilliant CEO reaching the age of retirement, or an unsuccessful Managing Director being asked to leave before fulfilling the term of her contract. Regardless of the cause, a transition must occur in which a suitable successor is chosen and put into place while minimizing costs, satisfying stakeholders, ensuring that the successor has been adequately prepared for their new position, and minimizing work place gossip, among other things. It is also important to understand how the nature of the business, as well as its financial standing, effects such a transition.Engineering and management principles come together in this study to ensure that organizations going through such a change are on the right course. As the problem of transitional management is not one of concrete values and contains many ambiguous concepts, one way to tackle the problem is by utilizing various industrial engineering methodologies that allow these companies to systematically begin preparing for such a change. By default, organizational strategy has to change, technology is continually being renewed and it becomes very hard for the same leader to constantly implement new and innovative developments.Organizations today have a very poor understanding of where they currently stand and as a result the cause for a company's lack of profitability is often overlooked with time and money being wasted in an attempt to fix something that is not broken. To be able to look at the bigger picture of an organization and from there begin to close in on the main problems causing a negative impact, the Matrix of Change is used and takes in many factors to layout an accurate representation of the direction in which an organization should be headed and how it can continue to grow and remain successful. The Theory of Constraints on the other hand is used here as a step-by-step guide allowing companies to be better organized during times of change. And System Dynamics modeling is where these companies can begin to simulate and solve the dilemma of transitional management using causal loop diagrams and stock and flow diagrams.Through such tools a framework can begin to be developed, one that is valued by corporations and continually reviewed. Several case studies, simulation modeling, and a panel of experts were used in order to demonstrate and validate this framework.
Show less - Date Issued
- 2014
- Identifier
- CFE0005160, ucf:50708
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005160
- Title
- A HOLISTIC MODEL OF THE INTERPLAY OF PARENT-ADOLESCENT INTERACTION VARIABLES: OUTCOMES AS A RESULT OF CONFLICTUAL PROCESSES.
- Creator
-
McKinney, Cliff Blake, Renk, Kimberly, University of Central Florida
- Abstract / Description
-
Many variables have been analyzed in order to understand parent-adolescent interactions and outcomes for adolescents. These variables must be integrated into a model that demonstrates the holistic interplay of parent-adolescent interaction variables so that a more comprehensive understanding of parent-adolescent interactions is achieved. Variables included in the model proposed here were parenting, family environment, expectations, conflict, and outcomes. Parenting, family environment, and...
Show moreMany variables have been analyzed in order to understand parent-adolescent interactions and outcomes for adolescents. These variables must be integrated into a model that demonstrates the holistic interplay of parent-adolescent interaction variables so that a more comprehensive understanding of parent-adolescent interactions is achieved. Variables included in the model proposed here were parenting, family environment, expectations, conflict, and outcomes. Parenting, family environment, and conflict were associated with outcomes for adolescents. When the variables were analyzed simultaneously with structural equation modeling, however, the relationship of parenting and adolescent outcomes was mediated wholly for male-father, male-mother, and female-father relationships but remained significant for female-mother relationships. Overall, the holistic interplay of parent-adolescent interaction variables and the need to examine parent-adolescent dyads individually were demonstrated.
Show less - Date Issued
- 2004
- Identifier
- CFE0000006, ucf:46144
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000006
- Title
- A HOLISTIC USABILITY FRAMEWORK FOR DISTRIBUTED SIMULATION SYSTEMS.
- Creator
-
Dawson, Jeffrey, Rabelo, Luis, University of Central Florida
- Abstract / Description
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This dissertation develops a holistic usability framework for distributed simulation systems (DSSs). The framework is developed considering relevant research in human-computer interaction, computer science, technical writing, engineering, management, and psychology. The methodology used consists of three steps: (1) framework development, (2) surveys of users to validate and refine the framework, and to determine attribute weights, and (3) application of the framework to two real-world systems...
Show moreThis dissertation develops a holistic usability framework for distributed simulation systems (DSSs). The framework is developed considering relevant research in human-computer interaction, computer science, technical writing, engineering, management, and psychology. The methodology used consists of three steps: (1) framework development, (2) surveys of users to validate and refine the framework, and to determine attribute weights, and (3) application of the framework to two real-world systems. The concept of a holistic usability framework for DSSs arose during a project to improve the usability of the Virtual Test Bed, a prototypical DSS, and the framework is partly a result of that project. In addition, DSSs at Ames Research Center were studied for additional insights. The framework has six dimensions: end user needs, end user interface(s), programming, installation, training, and documentation. The categories of participants in this study include managers, researchers, programmers, end users, trainers, and trainees. The first survey was used to obtain qualitative and quantitative data to validate and refine the framework. Attributes that failed the validation test were dropped from the framework. A second survey was used to obtain attribute weights. The refined framework was used to evaluate two existing DSSs, measuring their holistic usabilities. Ensuring that the needs of the variety of types of users who interact with the system during design, development, and use are met is important to launch a successful system. Adequate consideration of system usability along the several dimensions in the framework will not only ensure system success but also increase productivity, lower life cycle costs, and result in a more pleasurable working experience for people who work with the system.
Show less - Date Issued
- 2006
- Identifier
- CFE0001256, ucf:46906
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001256
- Title
- A Human-Centric Approach to Data Fusion in Post-Disaster Managment: The Development of a Fuzzy Set Theory Based Model.
- Creator
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Banisakher, Mubarak, McCauley, Pamular, Geiger, Christopher, Lee, Gene, Shi, Fuqian, Zou, Changchun, University of Central Florida
- Abstract / Description
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It is critical to provide an efficient and accurate information system in the post-disaster phase for individuals' in order to access and obtain the necessary resources in a timely manner; but current map based post-disaster management systems provide all emergency resource lists without filtering them which usually leads to high levels of energy consumed in calculation. Also an effective post-disaster management system (PDMS) will result in distribution of all emergency resources such as,...
Show moreIt is critical to provide an efficient and accurate information system in the post-disaster phase for individuals' in order to access and obtain the necessary resources in a timely manner; but current map based post-disaster management systems provide all emergency resource lists without filtering them which usually leads to high levels of energy consumed in calculation. Also an effective post-disaster management system (PDMS) will result in distribution of all emergency resources such as, hospital, storage and transportation much more reasonably and be more beneficial to the individuals in the post disaster period. In this Dissertation, firstly, semi-supervised learning (SSL) based graph systems was constructed for PDMS. A Graph-based PDMS' resource map was converted to a directed graph that presented by adjacent matrix and then the decision information will be conducted from the PDMS by two ways, one is clustering operation, and another is graph-based semi-supervised optimization process. In this study, PDMS was applied for emergency resource distribution in post-disaster (responses phase), a path optimization algorithm based ant colony optimization (ACO) was used for minimizing the cost in post-disaster, simulation results show the effectiveness of the proposed methodology. This analysis was done by comparing it with clustering based algorithms under improvement ACO of tour improvement algorithm (TIA) and Min-Max Ant System (MMAS) and the results also show that the SSL based graph will be more effective for calculating the optimization path in PDMS. This research improved the map by combining the disaster map with the initial GIS based map which located the target area considering the influence of disaster. First, all initial map and disaster map will be under Gaussian transformation while we acquired the histogram of all map pictures. And then all pictures will be under discrete wavelet transform (DWT), a Gaussian fusion algorithm was applied in the DWT pictures. Second, inverse DWT (iDWT) was applied to generate a new map for a post-disaster management system. Finally, simulation works were proposed and the results showed the effectiveness of the proposed method by comparing it to other fusion algorithms, such as mean-mean fusion and max-UD fusion through the evaluation indices including entropy, spatial frequency (SF) and image quality index (IQI). Fuzzy set model were proposed to improve the presentation capacity of nodes in this GIS based PDMS.
Show less - Date Issued
- 2014
- Identifier
- CFE0005128, ucf:50702
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005128
- Title
- A Hybrid Constitutive Model For Creep, Fatigue, And Creep-Fatigue Damage.
- Creator
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Stewart, Calvin, Gordon, Ali, Nicholson, David, Moslehy, Faissal, University of Central Florida
- Abstract / Description
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In the combustion zone of industrial- and aero- gas turbines, thermomechanical fatigue (TMF) is the dominant damage mechanism. Thermomechanical fatigue is a coupling of independent creep, fatigue, and oxidation damage mechanisms that interact and accelerate microstructural degradation. A mixture of intergranular cracking due to creep, transgranular cracking due to fatigue, and surface embrittlement due to oxidation is often observed in gas turbine components removed from service. The current...
Show moreIn the combustion zone of industrial- and aero- gas turbines, thermomechanical fatigue (TMF) is the dominant damage mechanism. Thermomechanical fatigue is a coupling of independent creep, fatigue, and oxidation damage mechanisms that interact and accelerate microstructural degradation. A mixture of intergranular cracking due to creep, transgranular cracking due to fatigue, and surface embrittlement due to oxidation is often observed in gas turbine components removed from service. The current maintenance scheme for gas turbines is to remove components from service when any criteria (elongation, stress-rupture, crack length, etc.) exceed the designed maximum allowable. Experimental, theoretical, and numerical analyses are performed to determine the state of the component as it relates to each criterion (a time consuming process). While calculating these metrics individually has been successful in the past, a better approach would be to develop a unified mechanical modeling that incorporates the constitutive response, microstructural degradation, and rupture of the subject material via a damage variable used to predict the cumulative (")damage state(") within a component. This would allow for a priori predictions of microstructural degradation, crack propagation/arrest, and component-level lifing. In this study, a unified mechanical model for creep-fatigue (deformation, cracking, and rupture) is proposed. It is hypothesized that damage quantification techniques can be used to develop accurate creep, fatigue, and plastic/ductile cumulative- nonlinear- damage laws within the continuum damage mechanics principle. These damage laws when coupled with appropriate constitutive equations and a degrading stiffness tensor can be used to predict the mechanical state of a component. A series of monotonic, creep, fatigue, and tensile-hold creep-fatigue tests are obtained from literature for 304 stainless steel at 600(&)deg;C (1112(&)deg;F) in an air. Cumulative- nonlinear- creep, fatigue, and a coupled creep-fatigue damage laws are developed. The individual damage variables are incorporated as an internal state variable within a novel unified viscoplasticity constitutive model (zero yield surface) and degrading stiffness tensor. These equations are implemented as a custom material model within a custom FORTRAN one-dimensional finite element code. The radial return mapping technique is used with the updated stress vector solved by Newton-Raphson iteration. A consistent tangent stiffness matrix is derived based on the inelastic strain increment. All available experimental data is compared to finite element results to determine the ability of the unified mechanical model to predict deformation, damage evolution, crack growth, and rupture under a creep-fatigue environment.
Show less - Date Issued
- 2013
- Identifier
- CFE0005061, ucf:49985
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005061
- Title
- A HYBRID ROUTING PROTOCOL FOR COMMUNICATIONS AMONG NODES WITHHIGH RELATIVE SPEED IN WIRELESS MESH NETWORKS.
- Creator
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PEPPAS, NIKOLAOS, Turgut, Damla, University of Central Florida
- Abstract / Description
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Wireless mesh networks (WMN) is a new promising wireless technology which uses already available hardware and software components. This thesis proposes a routing algorithm for military applications. More specifically, a specialized scenario consisting of a network of flying Unmanned Aerial Vehicles (UAVs) executing reconnaissance missions is investigated. The proposed routing algorithm is hybrid in nature and uses both reactive and proactive routing characteristics to transmit information....
Show moreWireless mesh networks (WMN) is a new promising wireless technology which uses already available hardware and software components. This thesis proposes a routing algorithm for military applications. More specifically, a specialized scenario consisting of a network of flying Unmanned Aerial Vehicles (UAVs) executing reconnaissance missions is investigated. The proposed routing algorithm is hybrid in nature and uses both reactive and proactive routing characteristics to transmit information. Through simulations run on a specially built stand alone simulator, based on Java, packet overhead, delivery ratio and latency metrics were monitored with respect to varying number of nodes, node density and mobility. The results showed that the high overhead leads to high delivery ratio while latency tends to increase as the network grows larger. All the metrics revealed sensitivity in high mobility conditions.
Show less - Date Issued
- 2007
- Identifier
- CFE0001607, ucf:47165
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001607
- Title
- A Hybrid Simulation Framework of Consumer-to-Consumer Ecommerce Space.
- Creator
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Joledo, Oloruntomi, Rabelo, Luis, Lee, Gene, Elshennawy, Ahmad, Ajayi, Richard, University of Central Florida
- Abstract / Description
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In the past decade, ecommerce transformed the business models of many organizations. Information Technology leveled the playing field for new participants, who were capable of causing disruptive changes in every industry. (")Web 2.0(") or (")Social Web(") further redefined ways users enlist for services. It is now easy to be influenced to make choices of services based on recommendations of friends and popularity amongst peers. This research proposes a simulation framework to investigate how...
Show moreIn the past decade, ecommerce transformed the business models of many organizations. Information Technology leveled the playing field for new participants, who were capable of causing disruptive changes in every industry. (")Web 2.0(") or (")Social Web(") further redefined ways users enlist for services. It is now easy to be influenced to make choices of services based on recommendations of friends and popularity amongst peers. This research proposes a simulation framework to investigate how actions of stakeholders at this level of complexity affect system performance as well as the dynamics that exist between different models using concepts from the fields of operations engineering, engineering management, and multi-model simulation. Viewing this complex model from a systems perspective calls for the integration of different levels of behaviors. Complex interactions exist among stakeholders, the environment and available technology. The presence of continuous and discrete behaviors coupled with stochastic and deterministic behaviors present challenges for using standalone simulation tools to simulate the business model.We propose a framework that takes into account dynamic system complexity and risk from a hybrid paradigm. The SCOR model is employed to map the business processes and it is implemented using agent based simulation and system dynamics. By combining system dynamics at the strategy level with agent based models of consumer behaviors, an accurate yet efficient representation of the business model that makes for sound basis of decision making can be achieved to maximize stakeholders' utility.
Show less - Date Issued
- 2016
- Identifier
- CFE0006122, ucf:51171
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006122
- Title
- A HYBRID SIMULATION METHODOLOGY TO EVALUATE NETWORK CENTRICDECISION MAKING UNDER EXTREME EVENTS.
- Creator
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Quijada, Sergio, Sepulveda, Jose, University of Central Florida
- Abstract / Description
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Currently the network centric operation and network centric warfare have generated a new area of research focused on determining how hierarchical organizations composed by human beings and machines make decisions over collaborative environments. One of the most stressful scenarios for these kinds of organizations is the so-called extreme events. This dissertation provides a hybrid simulation methodology based on classical simulation paradigms combined with social network analysis for...
Show moreCurrently the network centric operation and network centric warfare have generated a new area of research focused on determining how hierarchical organizations composed by human beings and machines make decisions over collaborative environments. One of the most stressful scenarios for these kinds of organizations is the so-called extreme events. This dissertation provides a hybrid simulation methodology based on classical simulation paradigms combined with social network analysis for evaluating and improving the organizational structures and procedures, mainly the incident command systems and plans for facing those extreme events. According to this, we provide a methodology for generating hypotheses and afterwards testing organizational procedures either in real training systems or simulation models with validated data. As long as the organization changes their dyadic relationships dynamically over time, we propose to capture the longitudinal digraph in time and analyze it by means of its adjacency matrix. Thus, by using an object oriented approach, three domains are proposed for better understanding the performance and the surrounding environment of an emergency management organization. System dynamics is used for modeling the critical infrastructure linked to the warning alerts of a given organization at federal, state and local levels. Discrete simulations based on the defined concept of "community of state" enables us to control the complete model. Discrete event simulation allows us to create entities that represent the data and resource flows within the organization. We propose that cognitive models might well be suited in our methodology. For instance, we show how the team performance decays in time, according to the Yerkes-Dodson curve, affecting the measures of performance of the whole organizational system. Accordingly we suggest that the hybrid model could be applied to other types of organizations, such as military peacekeeping operations and joint task forces. Along with providing insight about organizations, the methodology supports the analysis of the "after action review" (AAR), based on collection of data obtained from the command and control systems or the so-called training scenarios. Furthermore, a rich set of mathematical measures arises from the hybrid models such as triad census, dyad census, eigenvalues, utilization, feedback loops, etc., which provides a strong foundation for studying an emergency management organization. Future research will be necessary for analyzing real data and validating the proposed methodology.
Show less - Date Issued
- 2006
- Identifier
- CFE0001243, ucf:46926
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001243
- Title
- A HYBRID SYSTEM DYNAMICS-DISCRETE EVENT SIMULATIONAPPROACH TO SIMULATING THE MANUFACTURING ENTERPRISE.
- Creator
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Helal, Magdy, Rabelo, Luis, University of Central Florida
- Abstract / Description
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With the advances in the information and computing technologies, the ways the manufacturing enterprise systems are being managed are changing. More integration and adoption of the system perspective push further towards a more flattened enterprise. This, in addition to the varying levels of aggregation and details and the presence of the continuous and discrete types of behavior, created serious challenges for the use of the existing simulation tools for simulating the modern manufacturing...
Show moreWith the advances in the information and computing technologies, the ways the manufacturing enterprise systems are being managed are changing. More integration and adoption of the system perspective push further towards a more flattened enterprise. This, in addition to the varying levels of aggregation and details and the presence of the continuous and discrete types of behavior, created serious challenges for the use of the existing simulation tools for simulating the modern manufacturing enterprise system. The commonly used discrete event simulation (DES) techniques face difficulties in modeling such integrated systems due to increased model complexity, the lack of data at the aggregate management levels, and the unsuitability of DES to model the financial sectors of the enterprise. System dynamics (SD) has been effective in providing the needs of top management levels but unsuccessful in offering the needed granularity at the detailed operational levels of the manufacturing system. On the other hand the existing hybrid continuous-discrete tools are based on certain assumptions that do not fit the requirements of the common decision making situations in the business systems. This research has identified a need for new simulation modeling approaches that responds to the changing business environments towards more integration and flattened enterprise systems. These tools should be able to develop comprehensive models that are inexpensive, scalable, and able to accommodate the continuous and discrete modes of behavior, the stochastic and deterministic natures of the various business units, and the detail complexity and dynamic complexity perspectives in decision making. The research proposes and develops a framework to combine and synchronize the SD and DES simulation paradigms to simulate the manufacturing enterprise system. The new approach can respond to the identified requirements in simulating the modern manufacturing enterprise systems. It is directed toward building comprehensive simulation models that can accommodate all management levels while explicitly recognizing the differences between them in terms of scope and frequency of decision making as well as the levels of details preferred and used at each level. This SDDES framework maintains the integrity of the two simulation paradigms and can use existing/legacy simulation models without requiring learning new simulation or computer programming skills. The new framework uses a modular structure by which the SD and DES models are treated as members of a comprehensive simulation. A new synchronization mechanism that that maintains the integrity of the two simulation paradigms and is not event-driven is utilized to coordinate the interactions between the simulation modules. It avoids having one simulation paradigm dominating the other. For communication and model management purposes the SDDES formalism provides a generic format to describe, specify, and document the simulation modules and the information sharing processes. The SDDES controller which is the communication manager, implements the synchronization mechanism and manages the simulation run ensuring correct exchange of data in terms of timeliness and format, between the modules. It also offers the user interface through which users interact with the simulation modules.
Show less - Date Issued
- 2008
- Identifier
- CFE0002264, ucf:47835
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002264
