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 |
---|---|
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 ... 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... 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... 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... 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... 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... 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... Power inductors, or reactors as they are called in the power industry, are one of the fundamental components of a power system. They serve various purposes in both conventional and emerging power systems including: power flow control, fault current limitation, reactive power compensation, harmonic filtering, and others. This dissertation explores the design and applications of conventional powe... 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... Cloud computing increasingly handles confidential data, like private inference and query databases. Two strategies are used for secure computation: (1) employing CPU Trusted Execution Environments (TEEs) like AMD SEV, Intel SGX, or ARM TrustZone, and (2) utilizing emerging cryptographic methods like Fully Homomorphic Encryption (FHE) with libraries such as HElib, Microsoft SEAL, and PALISADE. T... Advancements in high-throughput technologies have led to an exponential increase in the generation of multi-modal data in computational biology. These datasets, comprising diverse biological measurements such as genomics, transcriptomics, proteomics, metabolomics, and imaging data, offer a comprehensive view of biological systems at various levels of complexity. However, integrating and analyzi... The Von-Neumann bottleneck, a major challenge in computer architecture, results from significant data transfer delays between the processor and main memory. Crossbar arrays utilizing spin-based devices like Magnetoresistive Random Access Memory (MRAM) aim to overcome this bottleneck by offering advantages in area and performance, particularly for tasks requiring linear transformations. These ar... Traditional crash frequency prediction models cannot capture the temporal effects of traffic characteristics due to the high level of data aggregation. Also, this approach is less suitable to address the crash risk for active traffic management strategies that typically operate for short-time intervals. Hence, this research proposes short-term crash prediction models for traffic management stra...
An Analysis Of Misclassification Rates For Decision Trees
Downloads:
8602
Control And Topology Improvements In Half-bridge Dc-dc Converters
Downloads:
7473
Defining Risk Assessment Confidence Levels For Use In Project Management Communications
Downloads:
6987
Successful Organizational Change: Aligning Change Type With Methods
Downloads:
6799
Effects Of Flight Factors On Pilot Performance, Workload, And Stress At Final Approach To Landing Phase Of Flight
Downloads:
6782
A Framework Roadmap For Implementing Lean Six Sigma In Local Governmental Entities
Downloads:
6759
On-chip Spiral Inductor/transformer Design And Modeling For Rf Applications
Downloads:
5753
Analysis And Design Optimization Of Multiphase Converter
Downloads:
4784
Studies Of Liquid Crystal Response Time
Downloads:
4277
Design of High Efficiency Brushless Permanent Magnet Machines and Driver System
Downloads:
3753
Seepage and Stability Analysis of the Earth Dams under Drawdown Conditions by using the Finite Element Method
Downloads:
3695
Impact Of Zinc Orthophosphate Inhibitor On Distribution System Water Quality
Downloads:
3607
Factors Affecting The Practices Of Iso 9001:2000 Quality Management System In Saudi Business Organizations
Downloads:
3404
Design and Simulation of Device Failure Models for Electrostatic Discharge (ESD) Event
Downloads:
3157
The Relationship between Agile Project Management and Project Success Outcomes
Downloads:
2987
On-Chip ESD Protection Design: Optimized Clamps
Downloads:
2891
Detecting Anomalies From Big Data System Logs
Downloads:
2048
Characteristics of Rotating Detonation Engines for Propulsion and Power Generation
Downloads:
880
Power Inductors: Design, Modeling and Analysis
Downloads:
609
Development,Validation, and Integration of AI-Driven Computer Vision System and Digital-twin System for Traffic Safety Dignostics
Downloads:
565
Investigating Emerging Technologies In Civil Structural Health Monitoring: Generative Artificial Intelligence And Virtual Reality
Downloads:
144
Addressing Challenges in Utilizing GPUs for Accelerating Privacy-Preserving Computation
Downloads:
84
Machine Learning Algorithms to Study Multi-Modal Data for Computational Biology
Downloads:
73
Adaptive Beyond Von-Neumann Computing Devices and Reconfigurable Architectures for Edge Computing Applications
Downloads:
67
Safety Evaluation of Active Traffic Management Strategies on Freeways by Short-Term Crash Prediction Models
Downloads:
8
Top CECS Master’s Theses (by download)
-
A Comparison Of Aluminum And Iron-based Coagulants For Treatment Of Surface Water In Sarasota County, Florida
Downloads: 18886David 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...
-
Effects Of The Soil Properties On The Maximum Dry Density Obtained Fro
Downloads: 9306Andres 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...
-
A Comparison And Evaluation of common Pid Tuning Methods
Downloads: 9117Justin 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...
-
A Framework for Measuring and Analyzing Customer Satisfaction at Computer Service Company using Lean Six Sigma
Downloads: 8382Mohammed 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...
-
Autonomous Quadcopter Videographer
Downloads: 7873Quiquia 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...
-
Methods and Techniques Used for Job Shop Scheduling
Downloads: 6998Yoo 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 ...
-
An Authentic Ecg Simulator
Downloads: 6774Paul 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...
-
Coupling Efficiency and Alignment Sensitivity of Single Mode Optical Fibers
Downloads: 6334James 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...
-
Aggregate Production Planning Techniques and Comparison
Downloads: 5586Fariborz 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...
-
Design and analysis of class AB RF power amplifier for wireless communication applications
Downloads: 5230Mohamed 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...
-
Class F And Inverse Class F Power Amplifier Subject To Electrical Stress Effect
Downloads: 5225Giji 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...
-
Design Optimization Of Solid Rocket Motor Grains For Internal Ballistic Performance
Downloads: 4560Roger 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...
-
Comparison Of Single Stage And Two Stage Stage Grid-tie Inverters
Downloads: 4391Keith 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...
-
Forced Convection Cooling of Electric Motors Using Enhanced Surfaces
Downloads: 4345Mohammed 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...
-
Planar Magnetics Design For Low-voltage Dc-dc Converters
Downloads: 4332Shangyang 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...
-
Mechanical Properties of Boron Carbide (B4C)
Downloads: 4114Ruslan 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...
-
Filter Settle Time for Signal Processing Applications
Downloads: 3762Michael 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...
-
A Comparison of Corrosion Rates Determined by Polarization Resistance Measurements for Zinc and Cadmium Metal Immersed in Nonstirred Aqueous Portland Cement Solution
Downloads: 3702William 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.
... -
Effect Of Annealing On Copper Thin Films:the Classical Size Effect And Agglomeration
Downloads: 3571Parag 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...
-
Theory of Eddy Currents for Nondestructive Testing
Downloads: 3564Craig 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...
-
The Design of Standard Cell VLSI Circuits
Downloads: 3438Randolph 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...
-
Scrubber Design for Phosphoric Acid Production Facility
Downloads: 3399Edward E. MayerThis report is an examination of the practical design of a phosphoric acid production facility wet scrubber. It includes a brief background of the Florida Phosphate Industry, in addition to the rules and regulations affecting the emission of fluoride contaminates. The theoretical aspects of a packed absorption tower is discussed prior to the actual design of a cross-flow wet scrubber of the typ...
-
Evaluating The Performance Of Animal Shelters: An Application Of Data Envelopment Analysis
Downloads: 3266Brandy 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...
-
Hybrid Physics-informed Neural Networks for Dynamical Systems
Downloads: 3052Renato 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...
-
The Challenges and Barriers Facing Successful Lean Implementation in the Qatari Manufacturing Organizations
Downloads: 2222Abdulwahab 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...