Both doctoral dissertations and master’s theses are archived through the UCF STARS site managed by the UCF Library. Reviewing successful dissertations and theses is an excellent means for current graduate students to develop roadmaps to guide their own work.
Thanks to UCF’s Showcase of Text, Archives, Research, & Scholarship (STARS), individuals may search electronic theses and dissertations (ETD) by advisor: Advisors | Electronic Theses and Dissertations, 2004-2019.
The table below is a repository of the dissertations and theses that have been developed by former students across CECS’s various departments.
Department | Thesis and Dissertation Repository |
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Civil, Environment, and Construction Engineering | Repository Page |
Computer Science | Repository Page |
Electrical & Computer Engineering | Repository Page |
Industrial Engineering & Management Systems | Repository Page |
Materials Science & Engineering | Repository Page |
Mechanical & Aerospace Engineering | Repository Page |
Top CECS PhD Dissertations (by download)
The decision tree is a well-known methodology for classification and regression. In this dissertation, we focus on the minimization of the misclassification rate for decision tree classifiers. We derive the necessary equations that provide the optimal tree prediction, the estimated risk of the tree's prediction, and the reliability of the tree's risk estimation. We carry out an extensive analys... Efficiency and transient response are two key requirements for DC-DC converters. Topology and control are two key topics in this dissertation. A variety of techniques for DC-DC converter performance improvement are presented in this work. Focusing on the efficiency issue, a variety of clamping techniques including both active and passive methods are presented after the ringing issues in DC-DC c... A review of the literature regarding risk management and effective risk communications identified that very few researchers have addressed risk assessment confidence levels when using risk scoring methods. The focus of this research is to develop a definition of risk assessment confidence levels for use in internal project management communications and to evaluate its usefulness. This research ... Since human errors are one of the major causes of flight accidents, the design and operation of the modern aircraft system deals with them seriously. Particularly, the pilot workload on aviation causes human errors. Whenever new procedures are introduced and operated, the aircraft capabilities have been checked in every aspect. However, there has been little study on the impact of the new proce... Lean Six Sigma is an approach focused on improving quality, reducing variation and eliminating waste in an organization. The concept of combining the principles and tools of Lean Enterprise and Six Sigma has occurred in the literature over the last several years. The majority of Lean Six Sigma applications have been in private industry, focusing mostly on manufacturing applications. The literat... The motivation behind this research is the prevalence of challenges and ambiguity associated with successful organizational change and the numerous available approaches in dealing with these challenges and ambiguity. Many definitions and methods have been suggested to manage change; however, organizations still report a high failure rate of their change initiatives. These high failure rates hig... Passive components are indispensable in the design and development of microchips for high-frequency applications. Inductors in particular are used frequently in radio frequency (RF) IC's such as low-noise amplifiers and oscillators. High performance inductor has become one of the critical components for voltage controlled oscillator (VCO) design, for its quality factor (Q) value directly affect... Future microprocessors pose many challenges to the power conversion techniques. Multiphase synchronous buck converters have been widely used in high current low voltage microprocessor application. Design optimization needs to be carefully carried out with pushing the envelope specification and ever increasing concentration towards power saving features. In this work, attention has been focused ... In this dissertation, the response time issue of the liquid crystal (LC) devices is investigated in meeting the challenges for display and photonic applications. The correlation between the LC director response time and the optical response time is derived theoretically and confirmed experimentally. A major contribution of this thesis is that, based on the small angle approximation, we derive r... The dissertation is concerned with the design of high-efficiency permanent magnet synchronous machinery and the control system. The dissertation first talks about the basic concept of the permanent magnet synchronous motor (PMSM) design and the mathematics design model of the advanced design method. The advantage of the design method is that it can increase the high load capacity at no cost of ... One of the major concerns in the behavior of an earth dam is the change in the exit gradient and the impact on the slope stability under drawdown conditions. Drawdown can cause increased seepage forces on the upstream slope which may result in the movement of soil particles in the flow direction and cause erosion problems. In this research, a numerical approach, based on the finite element meth... This dissertation consists of four papers concerning impacts of zinc orthophosphate (ZOP) inhibitor on iron, copper and lead release in a changing water quality environment. The mechanism of zinc orthophosphate corrosion inhibition in drinking water municipal and home distribution systems and the role of zinc were investigated. Fourteen pilot distribution systems (PDSs) which were identical and... Since it's release in Dec 2000, there has been a slow movement towards the new version of ISO 9001:2000 by ISO 9000:1994 certified organizations. Of the 561,747 ISO 9000 certified businesses, 167,210 are certified under the new ISO 9001:2000, which is less than 30 % of the total ISO 9000 certified companies. Although many studies have been conducted to understand and assess the practices of ISO... Because of the expansion in health information technology and the continued migration toward digital patient records as a foundation for the delivery of healthcare services, healthcare organizations face significant challenges in their efforts to determine how well they are protecting electronic health information from unauthorized disclosure. The disclosure of one’s personal medical informat... In this dissertation, the research mainly focused on discussing ESD failure event simulation and ESD modeling, seeking solutions for ESD issues by simulating ESD event and predict possible ESD reliability problem in IC design. The research involves failure phenomenon caused by ESD/ EOS stress, mainly on the thermal failure due to inevitable self-heating during an ESD stress. Standard Complement... As graphics and simulations become more realistic, techniques for approximating soft body objects, that is, non-solid objects such as liquids, gases, and cloth, are becoming increasingly common. The proposed generalized soft body method encompasses some specific cases of other existing models enabling simulation of a variety of soft body materials by parameter adjustment. This research presents... Agile project management (APM) has recently emerged as a new approach to managing complex projects. Some experts believe that APM will become the standard project management approach used in the 21st century. However, thus far, the role of agility in project management has not been widely investigated. In the recent past, the concept of agility has mainly been applied to software development pr... Evolutions in integrated circuit technology require the use of a high-frequency synchronous buck converter in order to achieve low cost, low profile, fast transient response and high power density. However, high frequency operation leads to increased power MOSFET switching losses. Optimization of the MOSFETs plays an important role in improving converter performance. This dissertation focuses o... Medical simulation has facilitated the understanding of complex biological phenomenon through its inherent explanatory power. It is a critical component for planning clinical interventions and analyzing its effect on a human subject. The success of medical simulation is evidenced by the fact that over one third of all medical schools in the United States augment their teaching curricula using p... The extensive use of Integrated Circuits (ICs) means complex working conditions for these tiny chips. To guarantee the ICs could work properly in various environments, some special protection strategies are required to improve the reliability of system. From all the possible reliability issues, the electrostatics discharge (ESD) might be the most common one. The peak current of electrostatics ... Nowadays, big data systems (e.g., Hadoop and Spark) are being widely adopted by many domains for offering effective data solutions, such as manufacturing, healthcare, education, and media. A common problem about big data systems is called anomaly, e.g., a status deviated from normal execution, which decreases the performance of computation or kills running programs. It is becoming a necessity t... Conventional engines are limited by the efficiency of their combustion mode. Compared to present constant pressure deflagration-based engines, detonation-based systems can realize a higher thermodynamic cycle efficiency, making them an attractive candidate for next generation propulsion systems that will take humanity to hypersonic speeds and even to Mars. For all its performance gains, detonat... The use of data and deep learning algorithms in transportation research have become increasingly popular in recent years. Many studies rely on real-world data. Collecting accurate traffic data is crucial for analyzing traffic safety. Still, traditional traffic data collection methods that rely on loop detectors and radar sensors are limited to collect macro-level data, and it may fail to monito... Condition assessment of civil engineering infrastructure systems is of growing importance as they face aging and degradation due to both human-made activities and environmental factors. Nevertheless, challenges persist in data collection, leading to "data scarcity", and the need for frequent site visits in inspections, presenting significant obstacles in the assessment of the civil infrastructu... Rapidly changing population dynamics and increased energy needs have reduced demand for building renovation in favor of more wasteful complete demolition and reconstruction. This dissertation aims to enhance the accessibility and ease of use of challenging retrofitting methodologies to mitigate adverse effects of urbanization, increasing resource use, and aging building stock within the United ...
An Analysis Of Misclassification Rates For Decision Trees
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8677
Control And Topology Improvements In Half-bridge Dc-dc Converters
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7605
Defining Risk Assessment Confidence Levels For Use In Project Management Communications
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7014
Effects Of Flight Factors On Pilot Performance, Workload, And Stress At Final Approach To Landing Phase Of Flight
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6920
A Framework Roadmap For Implementing Lean Six Sigma In Local Governmental Entities
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6875
Successful Organizational Change: Aligning Change Type With Methods
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6864
On-chip Spiral Inductor/transformer Design And Modeling For Rf Applications
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6049
Analysis And Design Optimization Of Multiphase Converter
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4816
Studies Of Liquid Crystal Response Time
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4588
Design of High Efficiency Brushless Permanent Magnet Machines and Driver System
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3822
Seepage and Stability Analysis of the Earth Dams under Drawdown Conditions by using the Finite Element Method
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3758
Impact Of Zinc Orthophosphate Inhibitor On Distribution System Water Quality
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3627
Factors Affecting The Practices Of Iso 9001:2000 Quality Management System In Saudi Business Organizations
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3417
An Approach For Measuring The Confidentiality Of Data Assured By The Confidentiality Of Information Security Systems In Healthcare Organizations
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3313
Design and Simulation of Device Failure Models for Electrostatic Discharge (ESD) Event
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3194
Modeling And Simulation Of Soft Bodies
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3137
The Relationship between Agile Project Management and Project Success Outcomes
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3065
Modeling And Analysis Of Power Mosfets For High Frequency Dc-dc Converters
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3002
Modeling, Simulation, And Visualization Of 3d Lung Dynamics
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2976
On-Chip ESD Protection Design: Optimized Clamps
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2918
Detecting Anomalies From Big Data System Logs
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2079
Characteristics of Rotating Detonation Engines for Propulsion and Power Generation
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1057
Development,Validation, and Integration of AI-Driven Computer Vision System and Digital-twin System for Traffic Safety Dignostics
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668
Investigating Emerging Technologies In Civil Structural Health Monitoring: Generative Artificial Intelligence And Virtual Reality
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274
Exploring the Benefits of the Integration of XR and BIM for Retrofitting Projects
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172
Top CECS Master’s Theses (by download)
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A Comparison Of Aluminum And Iron-based Coagulants For Treatment Of Surface Water In Sarasota County, Florida
Downloads: 19001David YongeIn this research, five different coagulants were evaluated to determine their effectiveness at removing turbidity, color and dissolved organic carbon (DOC) from a surface water in Sarasota County, Florida. Bench-scale jar tests that simulated conventional coagulation, flocculation, and sedimentation processes were used. Iron-based coagulants (ferric chloride and ferric sulfate) and aluminum-bas...
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A Comparison And Evaluation of common Pid Tuning Methods
Downloads: 9504Justin YouneyThe motivation behind this thesis is to consolidate and evaluate the most common Proportional Integral Derivative (PID) controller tuning techniques used in industry. These are the tuning techniques used when the plant transfer function is not known. Many of these systems are poorly tuned because such consolidated information is not easily found in one single source such as this thesis. Once on...
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Effects Of The Soil Properties On The Maximum Dry Density Obtained Fro
Downloads: 9454Andres ArveloIn the construction of highways, airports, and other structures, the compaction of soils is needed to improve its strength. In 1933 Proctor developed a laboratory compaction test to determine the maximum dry density of compacted soils, which can be used for specifications of field compaction. The Compaction of soils is influenced by many factors, the most common are the moisture content, the so...
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A Framework for Measuring and Analyzing Customer Satisfaction at Computer Service Company using Lean Six Sigma
Downloads: 8424Mohammed AbboodiThe computer service industry has been expanding dramatically due to the increase in the number of computing machineries in the last two decades. The entrance of large size companies in the market and the release of online tools that have the ability for diagnosing and troubleshooting hardware and software issues have boosted the competition. In the meantime, many of the small and medium size c...
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Autonomous Quadcopter Videographer
Downloads: 7891Quiquia Rey CoaguilaIn recent years, the interest in quadcopters as a robotics platform for autonomous photography has increased. This is due to their small size and mobility, which allow them to reach places that are difficult or even impossible for humans. This thesis focuses on the design of an autonomous quadcopter videographer, i.e. a quadcopter capable of capturing good footage of a specific subject. In orde...
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Methods and Techniques Used for Job Shop Scheduling
Downloads: 7053Yoo Baik YangThe job shop scheduling problem, in which we must determine the order or sequence for processing a set of jobs through several machines in an optimum manner, has received considerable attention. In this paper a number of the methods and techniques are reviewed and an attempt to categorize them according to their appropriateness for effective use in job shop scheduling has been made. Approaches ...
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An Authentic Ecg Simulator
Downloads: 6911Paul MichalekAn ECG (electrocardiogram) simulator is an electronic tool that plays an essential role in the testing, design, and development of ECG monitors and other ECG equipment. Principally an ECG simulator provides ECG monitors with an electrical signal that emulates the human heart's electrical signal so that the monitor can be tested for reliability and important diagnostic capabilities. However, the...
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Coupling Efficiency and Alignment Sensitivity of Single Mode Optical Fibers
Downloads: 6360James Mathew MartinCoupling efficiency an alignment sensitivity models for the coupling of light from a fundamental mode Gaussian light beam into a single mode optical fiber are given. Experimental results are presented which verify the coupling and misalignment predictions of the models. Data were taken at two wavelengths: 0.6328 and 0.8460 micrometers. The light sources were a HeNe laser and a GaAlAs laser resp...
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Design and analysis of class AB RF power amplifier for wireless communication applications
Downloads: 5718Mohamed El-DakrouryThe Power Amplifier is the most power-consulting block among the building blocks of RF transceivers. It is still a difficult problem to design power amplifiers, especially for linear, low voltage operation. Until now power amplifiers for wireless applications is being produced almost in GaAs processes with some exceptions in LDMOS, Si BJT, and SiGe HBT. The submicron CMOS processes for power am...
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Aggregate Production Planning Techniques and Comparison
Downloads: 5623Fariborz MazaheriAggregate production planning models are of the greatest importance to operations management, since these plans enable management to utilize the major resources at its command. In this report the structure of the aggregate planning problem and a number of different approaches are reviewed and presented. Approaches are classified in three categories: a) workforce smoothing models, b) productio...
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Class F And Inverse Class F Power Amplifier Subject To Electrical Stress Effect
Downloads: 5320Giji SkariaThis study investigated the Class F and inverse Class F RF power amplifier operating at 5.8 GHz. The major challenging issue in design and implementation of CMOS power transistor is the breakdown voltage especially in sub-micron CMOS technologies. In order to eliminate this problem a Cascode topologies were implemented to reduce the Drain-toSource voltage (stress). A Cascode Class F & Inver...
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Design Optimization Of Solid Rocket Motor Grains For Internal Ballistic Performance
Downloads: 4607Roger HainlineThe work presented in this thesis deals with the application of optimization tools to the design of solid rocket motor grains per internal ballistic requirements. Research concentrated on the development of an optimization strategy capable of efficiently and consistently optimizing virtually an unlimited range of radial burning solid rocket motor grain geometries. Optimization tools were applie...
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Planar Magnetics Design For Low-voltage Dc-dc Converters
Downloads: 4591Shangyang XiaoThe objectives of this thesis are to design planar magnetic devices based on accurate electromagnetic analysis and miniaturize magnetics within desired low profile as well as small footprint. A novel methodology based on FEM simulation is proposed. By introducing Maxwell 2D simulator, optimal interleaving structures can be found to reduce AC losses that cannot otherwise be accounted for by conv...
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Comparison Of Single Stage And Two Stage Stage Grid-tie Inverters
Downloads: 4404Keith MansfieldThis thesis compares two methods of designing grid-tie inverters. The first design topology is a traditional two stage approach consisting of an isolated DC-DC converter on the input followed by a high switching frequency SPWM (Sinusoidal Pulse Width Modulation) stage to produce the required low frequency sine wave output. The novel second design approach employs a similar DC-DC input stage cap...
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Forced Convection Cooling of Electric Motors Using Enhanced Surfaces
Downloads: 4376Mohammed AlmaghrabiElectric motors are extensively engaged in industrial and commercial applications such as electrical cars, energy-conversion systems, elevators, and actuators for aircrafts. Due to the significant internal heat generation, it is usually a challenge to design and manufacture high power density, high reliability, and low cost electric motors with superior performance. One of the efficient ways to...
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Mechanical Properties of Boron Carbide (B4C)
Downloads: 4204Ruslan KuliievBoron carbide (B4C) is one of the most important opaque boride ceramics that has high hardness and Young's modulus that along with low density lead to a significant resistance to ballistic impact and, thus, B4C is broadly used as a protective material. B4C has also high neutron capturing cross section; therefore, it is used as control rods and neutron absorption shielding in nuclear reactors. I...
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Filter Settle Time for Signal Processing Applications
Downloads: 3836Michael T. McCordIn this paper, the step modulated sine wave [u(t)Asin2πft] response of the low-pass, band-pass, and high-pass filters are evaluated. Butterworth filters from the first order on up to the ideal filter are analyzed, and expressions for the settle times developed. The longest settle time occurs for the ideal filter, with all other filters taking progressively less time to settle as the order decr...
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A Comparison of Corrosion Rates Determined by Polarization Resistance Measurements for Zinc and Cadmium Metal Immersed in Nonstirred Aqueous Portland Cement Solution
Downloads: 3713William James MooreThe effect of nonstirred aqueous Portland cement solution on the corrosion rates of zinc and cadmium metal using Tafel extrapolation and linear polarization measurements has been investigated. Results indicate that for the corrosion systems under investigation, zinc metal has a higher corrosion potential and lower corrosion rate than cadmium metal.
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Effect Of Annealing On Copper Thin Films:the Classical Size Effect And Agglomeration
Downloads: 3601Parag GadkariWith continued shrinking of CMOS technology to reduce the gate delay times, an increase in the resistivity of the metal corresponding to the wire dimension is a concern. This phenomenon of increase in resistivity with decreasing dimension of the thin metallic film or interconnect is known as the "classical size effect". Various theories have been postulated to explain the phenomenon of classica...
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Theory of Eddy Currents for Nondestructive Testing
Downloads: 3593Craig Charles BiddleEddy current inspection methods are used extensively in industry for the nondestructive testing of a wide variety of materials and product applications. The general theory of eddy current inspection is described. Equations defining the depth of penetration are derived from Maxwell's equations. Signal analysis methods are described using coil impedance diagrams. The impedance diagrams for a n...
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Design And Fabrication Of A Full-featured Labscale Hybrid Rocket Engine
Downloads: 3499Kyle PlattThe design, development, integration and testing of a full-featured, Lab-Scale Hybrid Rocket Engine was not only envisioned to be the chosen method of putting student payloads into space, but to be an invaluable teaching resource. The subject of the present thesis is the analysis, design, development, integration and demonstration of a lab-scale hybrid rocket motor. The overarching goal of this...
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Evaluating The Performance Of Animal Shelters: An Application Of Data Envelopment Analysis
Downloads: 3478Brandy HeydeThe focus of this thesis is the application of data envelopment analysis to understand and evaluate the performance of diverse animal welfare organizations across the United States. The results include identification of the most efficient animal welfare organizations, at least among those that post statistics on their operations, and a discussion of various partnerships that may improve the per...
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The Design of Standard Cell VLSI Circuits
Downloads: 3471Randolph L. AbidinThere are basically three methods of designing Very Large Scale Integrated (VLSI) circuits; Gate Array, Standard Cell, and Full Custom. The objective of this research is to design a VLSI circuit using the Standard Cell approach. A prime requisite for a successful design of these circuits is an integrated Computer Aided Design (CAD) system. The chip design requirements for an integrated CAD syst...
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Hybrid Physics-informed Neural Networks for Dynamical Systems
Downloads: 3099Renato Giorgiani do NascimentoOrdinary differential equations can describe many dynamic systems. When physics is well understood, the time-dependent responses are easily obtained numerically. The particular numerical method used for integration depends on the application. Unfortunately, when physics is not fully understood, the discrepancies between predictions and observed responses can be large and unacceptable. In this t...
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The Challenges and Barriers Facing Successful Lean Implementation in the Qatari Manufacturing Organizations
Downloads: 2230Abdulwahab AlyousefThe success of Toyota, the inventor of Lean Systems has drawn the attention of academics, researchers, and executives in the last decades. However, existing lean research is largely focused on developed economies in Europe, the Americas, and in Southeast Asia with little focus on the Arab world in general and Qatar specifically. There has been an emergence of manufacturing organizations and Sm...