Current Search: Methodology (x)
View All Items
(1 - 20 of 21)
Pages
- Title
- Utilizing Geographic Information Systems to Record and Analyze Osteoarthritis Data in Joints of the Arm: A Methodology for Dry Bones.
- Creator
-
Biernaski, Adam, Schultz, John, Wheeler, Sandra, Williams, Lana, Branting, Scott, University of Central Florida
- Abstract / Description
-
Osteoarthritis (OA) is one of the most common pathologies encountered in dry bone contexts. However, even with the wealth of publications on documenting the presence of OA from skeletons, these studies prove to be largely incomparable due to different scoring methodologies and procedures in calculating prevalence. The standardization of a new OA data collection procedure would mitigate variability in evaluating, scoring, and calculating the prevalence of OA, thus allowing accurate comparison...
Show moreOsteoarthritis (OA) is one of the most common pathologies encountered in dry bone contexts. However, even with the wealth of publications on documenting the presence of OA from skeletons, these studies prove to be largely incomparable due to different scoring methodologies and procedures in calculating prevalence. The standardization of a new OA data collection procedure would mitigate variability in evaluating, scoring, and calculating the prevalence of OA, thus allowing accurate comparison between studies. However, this level of data collection has often been described as unwieldy and lacking concordance. This research outlines a new methodology that utilizes Geographic Information Systems (GIS) to record OA characteristics, levels of expression, and spatial arrangement on the articular surfaces of the arm. The data was then processed using the analysis and visual rendering capabilities of GIS providing examples of OA patterning on the articular surface, within the joint, and within the individual. Using this method, large standardized OA datasets can be stored and the patterns within them modeled through the use of digitization, composite raster overlays, and modified binning techniques. The patterns recorded by this analysis can offer a more robust dataset on OA occurring within the arm that can provide the ability to explore OA progression and its relationship with biomechanical factors in larger datasets.
Show less - Date Issued
- 2019
- Identifier
- CFE0007789, ucf:52362
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007789
- Title
- WEB-BASED, GENDERED RECRUITMENT OF WOMEN BY ORGANIZED WHITE SUPREMACIST GROUPS.
- Creator
-
King, Angela, Morris, Joan, University of Central Florida
- Abstract / Description
-
According to the hate group watchdog organization, the Southern Poverty Law Center, the number of hate groups in the United States rose 54 percent since 2000 (SPLC 2009 a & b). Literature on organized white supremacist groups suggests that women have become increasingly more important to such groups for a variety of reasons, many of which are not always agreed upon by and within said groups. In addition, it is believed by many in the hate monitoring world that the World Wide Web has become...
Show moreAccording to the hate group watchdog organization, the Southern Poverty Law Center, the number of hate groups in the United States rose 54 percent since 2000 (SPLC 2009 a & b). Literature on organized white supremacist groups suggests that women have become increasingly more important to such groups for a variety of reasons, many of which are not always agreed upon by and within said groups. In addition, it is believed by many in the hate monitoring world that the World Wide Web has become progressively more dynamic as a medium of recruitment, as a tool of communication among members, and as a means to propagate the hateful messages espoused by members of these groups. Thus, this research will marry two essential ideas: (1) that women are being sought out and targeted for recruitment by organized white supremacist groups and (2) that the World Wide Web acts as a dynamic tool that aids said groups in accomplishing their goals of recruitment.
Show less - Date Issued
- 2009
- Identifier
- CFE0002621, ucf:48265
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002621
- Title
- Deadly Premonition: Does Terrorist-Leader Psychology Influence Violence Lethality?.
- Creator
-
Besaw, Clayton, Schafer, Mark, Jacques, Peter, Mousseau, Michael, University of Central Florida
- Abstract / Description
-
This thesis seeks to address a theoretical and empirical gap within terrorism studies, and more specially the study of terrorist-group lethality. This research updates a model of terrorist-group lethality by including terrorist-leader psychology as an individual-level variable in predicting terrorist-group lethality. Terrorist-leader statements were analyzed by using two novel coding schemes called Operational Code and Leadership Trait Analysis to create quantified measurements of leader...
Show moreThis thesis seeks to address a theoretical and empirical gap within terrorism studies, and more specially the study of terrorist-group lethality. This research updates a model of terrorist-group lethality by including terrorist-leader psychology as an individual-level variable in predicting terrorist-group lethality. Terrorist-leader statements were analyzed by using two novel coding schemes called Operational Code and Leadership Trait Analysis to create quantified measurements of leader cognitive beliefs and personality traits. The empirical portion of this study utilizes pooled cross-sectional time-series data within the framework of fixed effects and multi-level estimation models. The results find that terrorist-leader psychology, and more specifically Instrumental (Strategic) Beliefs and Distrust, are significant predictors of subsequent group-lethality.
Show less - Date Issued
- 2014
- Identifier
- CFE0005132, ucf:50679
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005132
- Title
- INVESTIGATION OF NASCAR RESTRICTOR PLATE MANIFOLD INSERT USING WAVE ENGINE SIMULATION AND RESPONSE SURFACE METHODOLOGY.
- Creator
-
Gross, John Mason, Hoekstra, Robert, University of Central Florida
- Abstract / Description
-
With the increasing growth in computer processing power, computer based computational fluid dynamics simulations are finding increasing acceptance and use in the field of internal combustion engine development. Once fully developed, such simulations provide detailed and expedient tools for testing existing theories, as well as new ideas. While numerous studies on wave propagation and fluid flow in intakes manifolds exist, most restrict the analysis to a single intake runner and port,...
Show moreWith the increasing growth in computer processing power, computer based computational fluid dynamics simulations are finding increasing acceptance and use in the field of internal combustion engine development. Once fully developed, such simulations provide detailed and expedient tools for testing existing theories, as well as new ideas. While numerous studies on wave propagation and fluid flow in intakes manifolds exist, most restrict the analysis to a single intake runner and port, examining only the dynamics from the runner-to-plenum junction downstream to the valve. While such analyses provide comprehensive models for wave propagation dynamics in the runner, little is published on the fluid dynamics and wave propagation in the plenum, and the interactions between runners when an intake manifold's geometric constraints prevent symmetry in the manifold. This paper will examine the modeling of a 2003 specification Dodge Motorsports NASCAR Restrictor Plate engine using Ricardo's WAVE engine simulation computational fluid dynamics software. This examination will include an introduction to the software and required engine data for constructing a comprehensive model, the process used to validate the simulation's output with acquired engine performance data, and the use of response surface methodology to optimize the dimensions of the plenum insert associated junction. Additionally, an analysis of the problems with modeling this area of the manifold using one-dimensional CFD will be conducted, as well as a discussion of the theories surrounding the insert. Finally, a new hypothesis regarding the insert as well as future work to examine this hypothesis will be introduced.
Show less - Date Issued
- 2004
- Identifier
- CFE0000124, ucf:46204
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000124
- Title
- Multi-Sensor Optimization of the Simultaneous Turning and Boring Operation.
- Creator
-
Deane, Erick, Xu, Chengying, Gou, Jihua, Gordon, Ali, University of Central Florida
- Abstract / Description
-
To remain competitive in today's demanding economy, there is an increasing demand for improved productivity and scrap reduction in manufacturing. Traditional manufacturing metal removal processes such as turning and boring are still one of the most used techniques for fabricating metal products. Although the essential metal removal process is the same, new advances in technology have led to improvements in the monitoring of the process allowing for reduction of power consumption, tool wear,...
Show moreTo remain competitive in today's demanding economy, there is an increasing demand for improved productivity and scrap reduction in manufacturing. Traditional manufacturing metal removal processes such as turning and boring are still one of the most used techniques for fabricating metal products. Although the essential metal removal process is the same, new advances in technology have led to improvements in the monitoring of the process allowing for reduction of power consumption, tool wear, and total cost of production. Replacing used CNC lathes from the 1980's in a manufacturing facility may prove costly, thus finding a method to modernize the lathes is vital.This research focuses on Phase I and II of a three phase research project where the final goal is to optimize the simultaneous turning and boring operation of a CNC Lathe. From the optimization results it will be possible to build an adaptive controller that will produce parts rapidly while minimizing tool wear and machinist interaction with the lathe. Phase I of the project was geared towards selecting the sensors that were to be used to monitor the operation and designing a program with an architecture that would allow for simultaneous data collection from the selected sensors at high sampling rates. Signals monitored during the operation included force, temperature, vibration, sound, acoustic emissions, power, and metalworking fluid flow rates. Phase II of this research is focused on using the Response Surface Method to build empirical models for various responses and to optimize the simultaneous cutting process. The simultaneous turning and boring process was defined by the four factors of spindle speed, feed rate, outer diameter depth of cut, and inner diameter depth of cut. A total of four sets of experiments were performed. The first set of experiments screened the experimental region toiiidetermine if the cutting parameters were feasible. The next three set s of designs of experiments used Central Composite Designs to build empirical models of each desired response in terms of the four factors and to optimize the process. Each design of experiments was compared with one another to validate that the results achieved were accurate within the experimental region.By using the Response Surface Method optimal machining parameter settings were achieved. The algorithm used to search for optimal process parameter settings was the desirability function. By applying the results from this research to the manufacturing facility, they will achieve reduction in power consumption, reduction in production time, and decrease in the total cost of each part.
Show less - Date Issued
- 2011
- Identifier
- CFE0004098, ucf:49087
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004098
- Title
- Managing, Controlling and Improving the Treatment of Produced Water Using the Six Sigma Methodology for the Iraqi Oil Fields.
- Creator
-
Al-Shamkhani, Maher T., Elshennawy, Ahmad, Rabelo, Luis, Pazour, Jennifer, Xanthopoulos, Petros, University of Central Florida
- Abstract / Description
-
Produced Water (PW) is the largest volume of waste that is normally generated during oil and gas production. It has large amounts of contaminants that can cause negative environmental and economic impacts. The management method for PW relies highly on types and concentrations of these contaminants, which are field dependent and can vary from one oil field to another. Produced water can be converted to fresh water if these contaminants are removed or reduced to the acceptable drinking water...
Show moreProduced Water (PW) is the largest volume of waste that is normally generated during oil and gas production. It has large amounts of contaminants that can cause negative environmental and economic impacts. The management method for PW relies highly on types and concentrations of these contaminants, which are field dependent and can vary from one oil field to another. Produced water can be converted to fresh water if these contaminants are removed or reduced to the acceptable drinking water quality level. In addition, increasing oil production rate and reducing amounts of discharged harmful contaminants can be achieved by removing dissolved hydrocarbons from PW. In order to identify the types of these contaminants, effective tools and methods should be used. Six Sigma, which uses the DMAIC (Define- Measure- Analyze- Improve- Control) problem-solving approach is one of the most effective tools to identify the root causes of having high percentages of contaminants in produced water. The methodology also helped develop a new policy change for implementing a way by which this treated water may be used. Six Sigma has not been widely implemented in oil and gas industries. This research adopted the Six Sigma methodology through a case study, related to the southern Iraqi oil fields, to investigate different ways by which produced water can be treated. Research results showed that the enormous amount of contaminated PW could be treated by using membrane filtration technology. In addition, a Multi Criteria Decision Making (MCDM) framework is developed and that could be used as an effective tool for decision makers. The developed framework could be used within manufacturing industries, services, educational systems, governmental organizations, and others.
Show less - Date Issued
- 2013
- Identifier
- CFE0004645, ucf:49904
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004645
- Title
- EXPOSURE MATTERS: EXAMINING THE PHYSICAL AND PSYCHOLOGICAL HEALTH IMPACTS OF TOXIC CONTAMINATION USING GIS AND SURVEY DATA.
- Creator
-
Bevc, Christine A., Marshall, Brent K., University of Central Florida
- Abstract / Description
-
In the late 1970s and early 1980s, the grassroots environmental movement brought national attention to the issues related to inequities in environmental quality. Previous research addressing these environmental inequities has progressively increased and advanced methodologically. However, the arguments and focus have been primarily limited to examining the socio-demographics in an ongoing debate of race and class. This thesis extends past the methodological stalemate focusing on the...
Show moreIn the late 1970s and early 1980s, the grassroots environmental movement brought national attention to the issues related to inequities in environmental quality. Previous research addressing these environmental inequities has progressively increased and advanced methodologically. However, the arguments and focus have been primarily limited to examining the socio-demographics in an ongoing debate of race and class. This thesis extends past the methodological stalemate focusing on the application of Geographic Information Systems (GIS) using survey data in an environmental justice case study of a community in south Florida. This approach examines the social, health and environmental impacts of a Superfund site on a low income, minority community. Using geo-coded survey (N=223) and environmental data (ash deposition patterns), this thesis employs path analysis to test the hypothesis that "exposure matters." The "exposure matters" hypothesis suggests exposure (perceived, self-reported and actual) is a significant predictor of physical and psychological health. Results discuss significant findings, and then compare them with previous disaster and trauma-related research and present directions for future research.
Show less - Date Issued
- 2004
- Identifier
- CFE0000033, ucf:46081
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000033
- Title
- THE SEARCH FOR TRUTH IN THE DIGITAL CINEMATIC SPACE AND GREEN SCREEN PERFORMANCES.
- Creator
-
Dalton, Kade, Shults, Kate, University of Central Florida
- Abstract / Description
-
With the advent of the blockbuster and its visual effects, film has grown to accept these effects and the technology behind them, namely green screen mattes, as cornerstones to the post-production process. The propensity of green screen in all types of productions, especially those involving actors and their performances, raises questions about the methodology and workflow behind its common practice. Using real-life environments and people to create narrative scenes, this project explores the...
Show moreWith the advent of the blockbuster and its visual effects, film has grown to accept these effects and the technology behind them, namely green screen mattes, as cornerstones to the post-production process. The propensity of green screen in all types of productions, especially those involving actors and their performances, raises questions about the methodology and workflow behind its common practice. Using real-life environments and people to create narrative scenes, this project explores the utilization of matte backgrounds to inform the rehearsal and performance aspects of cinematic story-telling.
Show less - Date Issued
- 2014
- Identifier
- CFH0004714, ucf:45409
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004714
- Title
- Selecting methods to teach controversial topics: A grounded theory study.
- Creator
-
Loomis, Sean, Russell, William, Waring, Scott, Hewitt, Randall, Swan, Bonnie, University of Central Florida
- Abstract / Description
-
This grounded theory study examined the perceptions of 14 high school social studies teachers from three school districts in the Central Florida area. They were interviewed to uncover the decision-making process that high school social studies teachers use to choose methodologies when teaching controversial public issues (CPIs). The result was a three-phase model, the CPI Decision-Making Model, in which teachers move through three conceptual phases to decide on a particular methodology. By...
Show moreThis grounded theory study examined the perceptions of 14 high school social studies teachers from three school districts in the Central Florida area. They were interviewed to uncover the decision-making process that high school social studies teachers use to choose methodologies when teaching controversial public issues (CPIs). The result was a three-phase model, the CPI Decision-Making Model, in which teachers move through three conceptual phases to decide on a particular methodology. By working through this process, teachers analyze the benefits and drawbacks of different methods for teaching controversial public issues. Significant results from this study included: (a) teachers were choosing to avoid teaching CPIs with standard-level students with student-centered methods, (b) teachers received little to no training in alternative methods and no training in how to deal with controversy in the classroom, (c) teachers possibly overestimated their ability to remain neutral in the classroom, and (d) teachers were learning their methodologies for teaching CPIs through unorthodox means.
Show less - Date Issued
- 2019
- Identifier
- CFE0007672, ucf:52492
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007672
- Title
- CONTRIBUTIONS BY INDIVIDUAL AND GROUP STRATEGIES FOR ORGANIZATIONAL LEARNING IN ARCHITECTURAL, ENGINEERING, AND CONSTRUCTION FIRMS.
- Creator
-
Beaver, Robert, Kotnour, Timothy, University of Central Florida
- Abstract / Description
-
Organizations with multiple operating requirements require support functions to assist in execution of strategic goals. This effort, in turn, requires management of engineering activities in control of projects and in sustaining facilities. High level strategies include employing engineering support that consists of a project management function encompassing technical and managerial disciplines. The architecture/engineering, and construction office (AEC) is the subject of this research....
Show moreOrganizations with multiple operating requirements require support functions to assist in execution of strategic goals. This effort, in turn, requires management of engineering activities in control of projects and in sustaining facilities. High level strategies include employing engineering support that consists of a project management function encompassing technical and managerial disciplines. The architecture/engineering, and construction office (AEC) is the subject of this research. Engineering and construction oriented organizations have experienced challenges to their abilities to learn and grow. This has potential detrimental implications for these organizations if support functions cannot keep pace with changing objectives and strategy. The competitive nature and low industry margins as well as uniqueness of projects as challenges facing engineering and construction. The differentiated nature of projects tasks also creates a need for temporary and dedicated modes of operation and thereby tends to promote highly dispersed management practices that do not dovetail very well with other organizational processes. Organizational learning is a means to enhance and support knowledge management for improving performance. The problem addressed through this research is the gap between desired and achieved individual and group learning by members of the AEC, and the members' abilities to distinguish between the need for adaptive learning or innovation. This research addresses learning by individuals and groups, and the strategies employed through an empirical study (survey). A conceptual model for organizational learning contributions by individuals and groups is presented and tested for confirmation of exploitive or explorative learning strategies for individuals, and directions composed of depth and breadth of learning. Strategies for groups are tested for internal or external search orientations and directions toward the single or multi-discipline unit. The survey is analyzed by method of principal components extraction and further interpreted to reveal factors that are correlated by Pearson product moment coefficients and tested for significance for potential relationships to factors for outcomes. Correlation across dependent variables prevented interpretation of the most significant factors for group learning strategies. However, results provide possible support for direction in supporting processes that promote networking among individuals and group structures that recognize the dual nature of knowledge - that required for technical competency and that required for success in the organization. Recommendations for practitioners include adjustments to knowledge acquisition direction, promoting external collaboration among firms, and provision of dual succession pathways through technical expertise or organizational processes for senior staff.
Show less - Date Issued
- 2009
- Identifier
- CFE0002682, ucf:48194
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002682
- Title
- Systems Geometry: A Methodology for Analyzing Emergent System of Systems Behaviors.
- Creator
-
Bouwens, Christina, Sepulveda, Jose, Karwowski, Waldemar, Xanthopoulos, Petros, Kapucu, Naim, University of Central Florida
- Abstract / Description
-
Recent advancements in technology have led to the increased use of integrated 'systems of systems' (SoS) which link together independently developed and usable capabilities into an integrated system that exhibits new, emergent capabilities. However, the resulting SoS is often not well understood, where secondary and tertiary effects of tying systems together are often unpredictable and present severe consequences. The complexities of the composed system stem not only from system integration,...
Show moreRecent advancements in technology have led to the increased use of integrated 'systems of systems' (SoS) which link together independently developed and usable capabilities into an integrated system that exhibits new, emergent capabilities. However, the resulting SoS is often not well understood, where secondary and tertiary effects of tying systems together are often unpredictable and present severe consequences. The complexities of the composed system stem not only from system integration, but from a broad range of areas such as the competing objectives of different constituent system stakeholders, mismatched requirements from multiple process models, and architectures and interface approaches that are incompatible on multiple levels. While successful SoS development has proven to be a valuable tool for a wide range of applications, there are significant problems that remain with the development of such systems that need to be addressed during the early stages of engineering development within such environments. The purpose of this research is to define and demonstrate a methodology called Systems Geometry (SG) for analyzing SoS in the early stages of development to identify areas of potential unintended emergent behaviors as candidates for the employment of risk management strategies. SG focuses on three dimensions of interest when planning the development of a SoS: operational, functional, and technical. For Department of Defense (DoD) SoS, the operational dimension addresses the warfighter environment and includes characteristics such as mission threads and related command and control or simulation activities required to support the mission. The functional dimension highlights different roles associated with the development and use of the SoS, which could include a participant warfighter using the system, an analyst collecting data for system evaluation, or an infrastructure engineer working to keep the SoS infrastructure operational to support the users. Each dimension can be analyzed to understand roles, interfaces and activities. Cross-dimensional effects are of particular interest since such effects are less detectable and generally not addressed with conventional systems engineering (SE) methods. The literature review and the results of this study have identified key characteristics or dimensions that should be examined during SoS analysis and design. Although many methods exist for exploring system dimensions, there is a gap in techniques to explore cross-dimensional interactions and their effect on emergent SoS behaviors. The study has resulted in a methodology for capturing dimensional information and recommended analytical methods for intra-dimensional as well as cross-dimensional analysis. A problem-based approach to the system analysis is recommended combined with the application of matrix methods, network analysis and modeling techniques to provide intra- and cross-dimensional insight. The results of this research are applicable to a variety of socio-technical SoS analyses with applications in analysis, experimentation, test and evaluation and training.
Show less - Date Issued
- 2013
- Identifier
- CFE0005135, ucf:50696
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005135
- Title
- The Attitude-Engagement Model Within-Persons: An Experience Sampling Study of Job Attitudes and Behavioral Engagement.
- Creator
-
Glerum, David, Wooten, William, Fritzsche, Barbara, Yee, Kevin, University of Central Florida
- Abstract / Description
-
Although a large body of research has attempted to answer the question, (")Is a happy worker a more productive worker?(") by examining the relationship between job attitudes and behaviors, results are often inconsistent. Drawing upon Fishbein and Ajzen's (1974) compatibility principle as well as theory on job attitude change and dynamic performance, the current study sought to answer this question by examining the attitudes-performance relationship at the within-persons level of analysis....
Show moreAlthough a large body of research has attempted to answer the question, (")Is a happy worker a more productive worker?(") by examining the relationship between job attitudes and behaviors, results are often inconsistent. Drawing upon Fishbein and Ajzen's (1974) compatibility principle as well as theory on job attitude change and dynamic performance, the current study sought to answer this question by examining the attitudes-performance relationship at the within-persons level of analysis. Specifically, an Attitude-Engagement Model that specifies a broad conceptualization of job attitudes and behavioral engagement should exhibit the strongest relationship between job attitudes and job behaviors (Harrison, Newman, (&) Roth, 2006; Newman, Joseph, (&) Hulin, 2010) within-persons. Although relationships between these two domains have been theorized and examined within a between-subjects framework, no attempts have been made to examine these broad factors at the within-subjects level. Using experience sampling methodology (ESM), job attitudes and job behavior data were collected from 52 hairdressers, cosmetologists, and barbers across 1,438 observations. Using intensive longitudinal methods (Bolger (&) Laurenceau, 2013), evidence for large within-persons variability in both job attitudes and behavioral engagement was found. Evidence for the Attitude-Engagement model at the within-persons level of analysis was also provided, even after introducing a one (")moment(") and one (")day(") time lag. Furthermore, in order to provide evidence for the construct validity of the A-Factor and the E-Factor within-persons, evidence for the within-persons reliability of the assessment of change was established employing a generalizability framework. The findings have both research and practical implications for the study of attitudes and behaviors in the workplace and suggest several interesting avenues for future research.
Show less - Date Issued
- 2016
- Identifier
- CFE0006107, ucf:51205
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006107
- Title
- design, characterization and analysis of component level electrostatic discharge (esd) protection solutions.
- Creator
-
Luo, Sirui, Liou, Juin, Yuan, Jiann-Shiun, Gong, Xun, Jin, Yier, Salcedo, Javier, University of Central Florida
- Abstract / Description
-
Electrostatic Discharges (ESD) is a significant hazard to electronic components and systems. Based on a specific process technology, a given circuit application requires a customized ESD consideration that meets all the requirements such as the core circuit's operating condition, maximum accepted leakage current, breakdown conditions for the process and overall device sizes. In every several years, there will be a new process technology becomes mature, and most of those new technology...
Show moreElectrostatic Discharges (ESD) is a significant hazard to electronic components and systems. Based on a specific process technology, a given circuit application requires a customized ESD consideration that meets all the requirements such as the core circuit's operating condition, maximum accepted leakage current, breakdown conditions for the process and overall device sizes. In every several years, there will be a new process technology becomes mature, and most of those new technology requires custom design of effective ESD protection solution. And usually the design window will shrinks due to the evolving of the technology becomes smaller and smaller. The ESD related failure is a major IC reliability concern and results in a loss of millions dollars each year in the semiconductor industry. To emulate the real word stress condition, several ESD stress models and test methods have been developed. The basic ESD models are Human Body model (HBM), Machine Mode (MM), and Charge Device Model (CDM). For the system-level ESD robustness, it is defined by different standards and specifications than component-level ESD requirements. International Electrotechnical Commission (IEC) 61000-4-2 has been used for the product and the Human Metal Model (HMM) has been used for the system at the wafer level.Increasingly stringent design specifications are forcing original equipment manufacturers (OEMs) to minimize the number of off-chip components. This is the case in emerging multifunction mobile, industrial, automotive and healthcare applications. It requires a high level of ESD robustness and the integrated circuit (IC) level, while finding ways to streamline the ESD characterization during early development cycle. To enable predicting the ESD performance of IC's pins that are directly exposed to a system-level stress condition, a new the human metal model (HMM) test model has been introduced. In this work, a new testing methodology for product-level HMM characterization is introduced. This testing framework allows for consistently identifying ESD-induced failures in a product, substantially simplifying the testing process, and significantly reducing the product evaluation time during development cycle. It helps eliminates the potential inaccuracy provided by the conventional characterization methodology. For verification purposes, this method has been applied to detect the failures of two different products.Addition to the exploration of new characterization methodology that provides better accuracy, we also have looked into the protection devices itself. ICs for emerging high performance precision data acquisition and transceivers in industrial, automotive and wireless infrastructure applications require effective and ESD protection solutions. These circuits, with relatively high operating voltages at the Input/Output (I/O) pins, are increasingly being designed in low voltage Complementary Metal-Oxide-Semiconductor (CMOS) technologies to meet the requirements of low cost and large scale integration. A new dual-polarity SCR optimized for high bidirectional blocking voltages, high trigger current and low capacitance is realized in a sub 3-V, 180-nm CMOS process. This ESD device is designed for a specific application where the operating voltage at the I/O is larger than that of the core circuit. For instance, protecting high voltage swing I/Os in CMOS data acquisition system (DAS) applications. In this reference application, an array of thin film resistors voltage divider is directly connected to the interface pin, reducing the maximum voltage that is obtained at the core device input down to (&)#177; 1-5 V. Its ESD characteristics, including the trigger voltage and failure current, are compared against those of a typical CMOS-based SCR.Then, we have looked into the ESD protection designs into more advanced technology, the 28-nm CMOS. An ESD protection design builds on the multiple discharge-paths ESD cell concept and focuses the attention on the detailed design, optimization and realization of the in-situ ESD protection cell for IO pins with variable operation voltages. By introducing different device configurations fabricated in a 28-nm CMOS process, a greater flexibility in the design options and design trade-offs can be obtained in the proposed topology, thus achieving a higher integration and smaller cell size definition for multi-voltage compatibility interface ESD protection applications. This device is optimized for low capacitance and synthesized with the circuit IO components for in-situ ESD protection in communication interface applications developed in a 28-nm, high-k, and metal-gate CMOS technology.ESD devices have been used in different types of applications and also at different environment conditions, such as high temperature. At the last section of this research work, we have performed an investigation of several different ESD devices' performance under various temperature conditions. And it has been shown that the variations of the device structure can results different ESD performance, and some devices can be used at the high temperature and some cannot. And this investigation also brings up a potential threat to the current ESD protection devices that they might be very vulnerable to the latch-up issue at the higher temperature range.
Show less - Date Issued
- 2015
- Identifier
- CFE0005655, ucf:50189
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005655
- Title
- Antecedents and Consequences of Customer Experience in Beverage Establishments.
- Creator
-
Bujisic, Milos, Nusair, Khaldoon, Sivo, Stephen, Hutchinson, Joe, Chen, Po-Ju, Mattila, Anna, University of Central Florida
- Abstract / Description
-
It is estimated that there are approximately 42,000 beverage establishments in the U.S. whose annual revenue surpasses $20 billion (First Research, 2014). To facilitate discussion of beverage establishments, it is essential to recognize beverage establishments as businesses whose majority of sales come from alcoholic drinks (Moss, 2010a). In this research, beverage establishments are divided into beverage-only bars, bar/entertainment combinations, and food and beverage combinations. Even...
Show moreIt is estimated that there are approximately 42,000 beverage establishments in the U.S. whose annual revenue surpasses $20 billion (First Research, 2014). To facilitate discussion of beverage establishments, it is essential to recognize beverage establishments as businesses whose majority of sales come from alcoholic drinks (Moss, 2010a). In this research, beverage establishments are divided into beverage-only bars, bar/entertainment combinations, and food and beverage combinations. Even though they are a well-established industry, beverage establishments have received little academic attention (Moss, 2010b). For example, previous studies have given little attention to the development of the model that examines the relationships between quality attributes, convenience, perceived price fairness, customer experience, and customer loyalty in beverage establishments. However, current research in other service sectors has showed that quality, pricing and convenience have a strong effect on customer experience and behavioral intentions (Baker (&) Crompton, 2000; Cronin et al., 2000; Taylor (&) Baker, 1994; Tian-Cole, Crompton, (&) Willson, 2002; Woodside et al., 1989). Quality is tightly related to customer experience since it positively affects customer satisfaction and therefore company's profitability (Hallowell, 1996).This study has the following objectives: (1) to develop an instrument to measure the antecedents of customer experience in beverage establishments; (2) to examine the relative importance of different antecedents of customer experience in different types of beverage establishments; and (3) to build a model of various antecedents of customer experience in beverage establishments.This study was conducted in six phases. The first phase was the analysis of previous literature regarding quality attributes, convenience, perceived price fairness, customer experience, customer loyalty, and beverage establishments. The second phase was a development of mixed methodology research design. The third phase was the data collection based on interviews with management of beverage establishments, customer focus groups, and a survey of customers of beverage establishments. The fourth phase was a pilot study that involved a refinement of the study instrument. The fifth phase was a main quantitative study based on the survey design. The results from each qualitative and quantitative phase of the study were integrated and analyzed.The results from the instrument development part of the study identified the following eleven antecedents of customer experience in beverage establishments: (1) service quality, (2) product quality, (3) physical environment design, (4) physical environment layout, (5) music quality, (6) social environment, (7) information convenience, (8) location convenience, (9) parking convenience, (10) entrance fee fairness, and (11) perceived price fairness. Additionally, the second instrument development study was used to recognize different customer experiential state dimensions. The factor structure included two customer experiential states: (1) the affective experiential state and (2) the cognitive experiential state.A comprehensive theoretical model that integrates different dimensions of antecedents of customer experience, customer experiential states, customer loyalty and the moderating affect of the type of the beverage establishment was developed. One of the most important findings of the study is the relationship between the social environment and the affective experiential state. The results of the study indicate that the majority of other antecedents of customer experience did not have a significant effect on two experiential states or that effect was relatively weak. However, social environment was the strongest predictor of customers' positive emotions and therefore customer loyalty and behavioral intentions. Finally, the study results confirmed Oliver's (1997) theory of customer loyalty by providing support for the sequential relationship between cognitive, affective, and conative loyalty. This study has several important theoretical contributions. Different antecedents of customer experience in beverage establishments were recognized and an instrument that measures these dimensions was developed. To the best of our knowledge, this is the first scale specifically developed to measure experience in beverage establishments. Additionally, the importance of each of the antecedent of customer experience was examined in regards to their effect on customer experience. Additionally, an instrument that measures cognitive and affective experiential states was developed and was a foundation for the study model. Finally, this study integrates different customer experience and customer loyalty dimensions into a comprehensive theoretical model that could be applied and retested in other service settings.
Show less - Date Issued
- 2014
- Identifier
- CFE0005309, ucf:50532
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005309
- Title
- An Exploratory Study of Customer Vulnerability: A Cross-Segment Approach.
- Creator
-
Aiello, Taryn, Severt, Denver, Rompf, Paul, Breiter, Deborah, University of Central Florida
- Abstract / Description
-
The purpose of this study is to explore the concept of customer vulnerability across varying service industries. While the concept of customer vulnerability has been debated in business, marketing, sociology, and psychology scholarly literature, there has been little research conducted that specifically investigates consumers' perceptions of vulnerability during the service exchange. Specific to this research, customer vulnerability is defined as experiences in which consumers participate in...
Show moreThe purpose of this study is to explore the concept of customer vulnerability across varying service industries. While the concept of customer vulnerability has been debated in business, marketing, sociology, and psychology scholarly literature, there has been little research conducted that specifically investigates consumers' perceptions of vulnerability during the service exchange. Specific to this research, customer vulnerability is defined as experiences in which consumers participate in a service exchange with a firm during a time of individual or shared medical, physical, emotional, or spiritual necessity, whether the vulnerability is experienced during the course of the transaction or whether consumers arrive to the firm already immersed in that state. Customer vulnerability is an important concept for research, as the exchanges between service providers and consumers during a time of vulnerability are heightened in emotion and memory. As a result, these exchanges lend themselves to be more likely to become transformative experiences, in that the provider and recipient may be left emotionally, intellectually, and spiritually changed as a result. Therefore, additional focus is needed in this area to understand transformative experiences in service as a result of exchanges between service providers and customers.The explorative study first conducts a critical literature review across disciplines regarding scales that have been used and are considered by the researcher to be important constructs of analysis when exploring vulnerable service encounters. Next, a qualitative investigation of consumer forums is conducted in the air travel, banking, and assisted living industries, which resulted in the finding that similar behavioral attributes within industry, but different behavioral attributes between industries, were needed to cater to consumers experiencing vulnerability. The study is followed by a quantitative investigation of vulnerable service experiences through an application of the identified scales combined with the results of the qualitative investigation across the same three industries. Exploratory factor analysis revealed that two industries' results loaded onto two factors; however, each industry's factors differed due to the nature of that industry. The air travel factors were entitled task humanism and task functionality. The banking factors were entitled maintenance functionality and maintenance humanism. A third factor was revealed within the assisted living facility segment entitled hospitable humanism, along with factors of personal humanism and personal functionality. The study concludes by presenting a discussion of the findings and practical implications for service industry managers, a presentation of the study limitations, and suggestions for future research.
Show less - Date Issued
- 2013
- Identifier
- CFE0005291, ucf:50542
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005291
- Title
- A SYSTEMATIC REVIEW TO ASSESS THE METHODOLOGICAL QUALITY OF INTERVENTION RESEARCH DESIGNED TO INCREASE PHYSICAL ACTIVITY IN CHILDREN WITH AUTISM SPECTRUM DISORDERS.
- Creator
-
Winn, Jolene, Tucker, Jennifer, University of Central Florida
- Abstract / Description
-
In comparison to normally developing children, many children with Autism Spectrum Disorders (ASD) do not possess the same opportunities to be physically active due to the impairments exhibited by their disorder. A systematic review using the Downs and Black checklist and the PEDro scale was conducted to assess the methodological quality of the literature on promoting physical activity in children with ASD. The following inclusion criteria had to be met: (1) subjects must include children with...
Show moreIn comparison to normally developing children, many children with Autism Spectrum Disorders (ASD) do not possess the same opportunities to be physically active due to the impairments exhibited by their disorder. A systematic review using the Downs and Black checklist and the PEDro scale was conducted to assess the methodological quality of the literature on promoting physical activity in children with ASD. The following inclusion criteria had to be met: (1) subjects must include children with a clinical ASD diagnosis (2) the children have to be under the age of thirteen years old (3) the interventions must target physical activity; lastly, (4) they must be a relevant peer-reviewed English language study. The search was conducted using four electronic databases: MEDLINE, ERIC, PsycInfo, and CINHL with no restriction on the publication year. The following keywords were utilized: "Autism", "ASD/ Autism Spectrum Disorder", "Asperger", "Pervasive Developmental Disorder" Those terms were paired with "physical activity", "physical exercise", "exercise", "fitness", "aerobic", "swim", "aquatic", "jog", "walk", "recreational activity" Which were also paired with the terms "school age", "child", "toddler", "preadolescent". This multi-step search procedure occurred during February 2013. The methodological quality of six studies was evaluated in February 2013. Overall, the conclusive scores determined by the Downs and and Black checklist and the PEDro scale varied greatly. The scores reported by the Downs and Black checklist ranged from 19 to 21 on a 27-point scale. PEDro scale yielded scores ranging between two and six on a 10-point scale. A vote count revealed that the exercise interventions increased the physical fitness, aquatic skills, social behaviors, and sensory integration children with ASD. In summary, the variation within the scores and the quality of the studies leads to a demand for future research. In order to adequately determine what exercise interventions effectively increase physical activity in children with ASD, future researchers should conduct randomized controlled trials in order to produce the highest quality of evidence.
Show less - Date Issued
- 2013
- Identifier
- CFH0004404, ucf:45092
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004404
- Title
- The Ability to Critically Evaluate Research Literature in Speech-Language Pathology.
- Creator
-
Gregorio, David, Carnaby, Giselle, Hoffman Ruddy, Bari, Crary, Michael, University of Central Florida
- Abstract / Description
-
Research in Speech-Language Pathology provides the basis for understanding how and to what degree therapeutic techniques and interventions affect the health and quality of life of individuals with communication disorders. Across numerous fields of healthcare, research serves just as important a function and is used to guide the practices of professionals across the public health sector. Several disciplines, including chiropracty, nursing, and physical therapy, rely on the implementation of...
Show moreResearch in Speech-Language Pathology provides the basis for understanding how and to what degree therapeutic techniques and interventions affect the health and quality of life of individuals with communication disorders. Across numerous fields of healthcare, research serves just as important a function and is used to guide the practices of professionals across the public health sector. Several disciplines, including chiropracty, nursing, and physical therapy, rely on the implementation of Evidence-Based Practice (EBP) to ensure that the process of rehabilitation and the techniques employed therein are carried out though the synthesis of best clinical judgment, empirical evidence, and patient values. The field of Speech-Language Pathology also uses EBP as the foundation of intervention and rehabilitation. Research has shown, however, that clinicians in a variety of settings encounter barriers to the implementation of EBP. Such reported barriers include lack of access to current research literature, lack of time with which to review the literature, and difficulty determining the quality of research available. General aims of the present study were: (1) to explore speech pathologists' self-reported patterns of access and use of techniques presented in the current research literature, (2) to investigate their self-rated knowledge of and ability to critically evaluate the research literature, and (3) to examine their knowledge and ability through use of a problem-based survey design. 325 certified Speech-Language Pathologists (SLPs) were administered a brief web-based survey to collect information that might provide insight related to these research questions. Results of the study indicated that, on average, participants access the research literature and utilize techniques found therein with moderate frequency. Findings also reveal that self-rated capacity and research knowledge were significantly greater for respondents who had acquired their PhD and for those who had previously conducted formal research. Significant results were also found when evaluating differences among respondent's place of work by median change in self-rated research capacity. Furthermore, positive correlations were found between research knowledge and self-rated capacity and research knowledge and research evaluation. These findings call attention to the process through which research methodology is taught in higher education. The findings may also suggest that a more effective and functional model of instruction in this area is critical to the clinical implementation of EBP.
Show less - Date Issued
- 2017
- Identifier
- CFE0006597, ucf:51269
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006597
- Title
- A curricula assessment and improvement quantitative model for higher education: a design for six sigma methodology.
- Creator
-
Halawany, Abdullah, Elshennawy, Ahmad, Lee, Gene, Rabelo, Luis, Rahal, Ahmad, University of Central Florida
- Abstract / Description
-
Curricula assessment is an integrated process to assist higher education institutions in addressing the challenges in adesignated field of study and in exploring the opportunities to better educate and prepare their students for an increasinglycomplex world.Although assessment as a topic has been researched extensively, there has been a lack of quantitative tools that addressthe requirements of many of the stakeholders that may be critical to the curriculum design and assessment processes...
Show moreCurricula assessment is an integrated process to assist higher education institutions in addressing the challenges in adesignated field of study and in exploring the opportunities to better educate and prepare their students for an increasinglycomplex world.Although assessment as a topic has been researched extensively, there has been a lack of quantitative tools that addressthe requirements of many of the stakeholders that may be critical to the curriculum design and assessment processes.This research proposes the utilization of Design for Six Sigma (DFSS) to develop a quantitative model for curriculumassessment and improvement for higher education institutions. A review of the literature indicates that there is a lack ofquantitative tools that enhance the reliability and efficiency of gathering customer requirements for curriculum in highereducation environment. In addition, there is a lack of tools to translate these requirements into actual characteristics that canbe used for curriculum design and assessment purposes. The literature also indicates that curriculum assessment is one ofseveral educational processes that affect the quality of education.This research proposes a quantitative model for curriculum assessment and improvement in higher education institutions,utilizing design for six sigma methodology. The proposed model explores the use of the Kano model concept to translateneeded requirements into desirable curriculum attributes and the general concept of establishing transfer function todetermine the level at which those requirements have been satisfied. The use of the developed model can help improvestudent learning and provide curriculum stakeholders with timely feedback about the curriculum and identify areas in need ofimprovement.To validate the capability of the proposed model, an ABET accredited department of Industrial Engineering in a USuniversity was used a case study.
Show less - Date Issued
- 2014
- Identifier
- CFE0005344, ucf:50497
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005344
- Title
- "ANALYZING THE EFFECTS OF SINGLE-SOURCING METHODOLOGIES ON THE ROLE OF THE TECHNICAL COMMUNICATOR".
- Creator
-
Boehl, Jeremy, Applen, J.D., University of Central Florida
- Abstract / Description
-
This thesis discusses the specific effects of single sourcing methodologies on the role of the technical communicator, his or her job responsibilities, qualifications, collaboration with coworkers, employee and employer expectations, and the effects on career progression. The methodologies discussed included all types of single sourcing methods for technical documentation (such as XML-based), advanced and non-advanced Content Management Systems (CMS), and Digital Asset Management (DAM)...
Show moreThis thesis discusses the specific effects of single sourcing methodologies on the role of the technical communicator, his or her job responsibilities, qualifications, collaboration with coworkers, employee and employer expectations, and the effects on career progression. The methodologies discussed included all types of single sourcing methods for technical documentation (such as XML-based), advanced and non-advanced Content Management Systems (CMS), and Digital Asset Management (DAM) systems. Other topics explored are an overview of single sourcing for technical documentation, a comparison of the "craftsman model" to the current trend of single sourcing and structured content, specific effects on technical communicators such as role changes, the effects of incorporating XML into a technical communicator's daily work environment, and the effects of other emerging technologies such as advanced CMS and DAM systems on technical communicators. General findings include that the practice of single sourcing, whether a positive or negative development, has continued and likely will continue to increase in technical communication groups within organizations. Single sourcing, especially for dynamic, customized content is also increasing because of the current marketplace, but works best via the use of a CMS and other systems used by large organizations. Single sourcing is also best implemented after extensive strategic planning and training of employees. Many technical communicators will have to accept new roles and positions, the direction of which is greatly impacted by the extent of their skills. Recommendations are made for additional research on the effects of single sourcing implementation on the technical communicator, and how to adapt to changes. Additional research is also needed on XML, DITA (Darwinian Information Typing Architecture), and DAM systems, all related specifically to technical communication.
Show less - Date Issued
- 2006
- Identifier
- CFE0001302, ucf:47031
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001302
- Title
- MEASURING THE EFFECT OF ERRATIC DEMANDON SIMULATED MULTI-CHANNEL MANUFACTURINGSYSTEM PERFORMANCE.
- Creator
-
Kohan, Nancy, Kulonda, Dennis, University of Central Florida
- Abstract / Description
-
ABSTRACT To handle uncertainties and variabilities in production demands, many manufacturing companies have adopted different strategies, such as varying quoted lead time, rejecting orders, increasing stock or inventory levels, and implementing volume flexibility. Make-to-stock (MTS) systems are designed to offer zero lead time by providing an inventory buffer for the organizations, but they are costly and involve risks such as obsolescence and wasted expenditures. The main concern of make-to...
Show moreABSTRACT To handle uncertainties and variabilities in production demands, many manufacturing companies have adopted different strategies, such as varying quoted lead time, rejecting orders, increasing stock or inventory levels, and implementing volume flexibility. Make-to-stock (MTS) systems are designed to offer zero lead time by providing an inventory buffer for the organizations, but they are costly and involve risks such as obsolescence and wasted expenditures. The main concern of make-to-order (MTO) systems is eliminating inventories and reducing the non-value-added processes and wastes; however, these systems are based on the assumption that the manufacturing environments and customers' demand are deterministic. Research shows that in MTO systems variability and uncertainty in the demand levels causes instability in the production flow, resulting in congestion in the production flow, long lead times, and low throughput. Neither strategy is wholly satisfactory. A new alternative approach, multi-channel manufacturing (MCM) systems are designed to manage uncertainties and variabilities in demands by first focusing on customers' response time. The products are divided into different product families, each with its own manufacturing stream or sub-factory. MCM also allocates the production capacity needed in each sub-factory to produce each product family. In this research, the performance of an MCM system is studied by implementing MCM in a real case scenario from textile industry modeled via discrete event simulation. MTS and MTO systems are implemented for the same case scenario and the results are studied and compared. The variables of interest for this research are the throughput of products, the level of on-time deliveries, and the inventory level. The results conducted from the simulation experiments favor the simulated MCM system for all mentioned criteria. Further research activities, such as applying MCM to different manufacturing contexts, is highly recommended.
Show less - Date Issued
- 2004
- Identifier
- CFE0000240, ucf:46275
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000240
