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Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
Electric power lines are subject to disturbances such as severe weather conditions, contact with animals, falling trees, human accidents, equipment malfunction, etc. These catastrophic events can trigger an electrical fault, which...
The Heisenberg Uncertainty principle is a fundamental concept from Quantum Mechanics that also describes the Fourier Transform. Unfortunately, it does not directly apply to the digital signals. However, it can be generalized if we use...
Systems with critical functionality and are prone to damage due to excessive stress level from operation conditions and working environment requires health monitoring. Condition or health monitoring involves acquiring data that can be...
In order to image or map targets on an ocean floor, a synthetic aperture sonar platform is moved underwater over the ocean floor. The platform pings or transmits acoustic signals, which reflect off the target back to the receiver. A...
This work’s objective is to apply the model predictive control method to the intelligent energy management layer of the Future Renewable Electric Energy Delivery and Management system. This allows for optimal power reference signals to...
The demand for high-voltage and high-power power electronics devices, especially for the next generation electrical ship system, has increased rapidly these years. The three-phase three-level neutral point clamped (NPC) rectifier...
In this thesis, an approach is proposed for the design and implementation of fuzzy traffic controllers using Field Programmable Gate Arrays (FPGAs).The focus of this study is to develop an effective traffic signaling strategy to be...
In this research, two important concepts concerning parallel robots are investigated: compliance and fault tolerance. First, we address the issue of synthesizing a suitable compliance. This is an important problem since a well-designed...
A proposed alternative wireless communication technique is developed and compared to the current radio frequency command link in a Flight Termination System. The command link in a Flight Termination System requires a reliable signal in a...
Recently, the smart grid technologies have been developed rapidly recently, which an important component is the so called demand response management (DRM). With the help of a DRM program, a utility company can adjust the power demand and...
The innovation and accessibility of Internet across the globe has made life easy. For instance, enormous information in the form of digital data (images, audios, videos, pdf, etc.) is available on Internet, which can easily be accessed...
The demand for high-speed mobile wireless communications is rapidly growing. MIMO technology promises to be a key technique for achieving the high date capacity and spectral efficiency for wireless communication systems of the near...
Although many attempts have been made to construct an economically feasible Fault Current Limiter (FCL), no FCL has yet been widely accepted by the power industry. This thesis presents a novel fault current limiter for power system...
Many pattern recognition tasks employ artificial neural networks based on radial basis functions. The statistical characteristics of pattern generating processes are determined by neural networks. The Gaussian potential function is the...
The medium voltage dc (MVDC) power system is gaining increasing attention in applications such as renewable energy and shipboard power systems due to its advantages in reliability, efficiency, power quality and power density. However, ...
Swarm behavior indicates the direct or indirect interactions among relatively simple agents to perform a particular task that is unknown to the individual agent. The study of swarm behavior originates from the research of swarms in...
Large-scale storage arrays are always in high demand by universities, government agencies, web search engines, and research laboratories. This unvarying need for more data storage has begun to push storage array magnitudes into an...
Switching-mode single-phase DC-AC converters have been widely used in critical applications such as uninterrupted power supply systems and AC motor drivers. Among various control techniques, Pulse Width Modulation (PWM) technique is the...
Grid codes impose immunity requirements to the generation systems that are connected to the transmission lines. Immunity refers to the generator’s capability to overcome grid abnormal conditions. One of the requirements is to remain...
In this work, Side-Channel Attacks (SCAs) are considered as a security metric for the implementation of hybrid cryptosystems utilizing the neural network-based Tree Parity Re-keying Machines (TPM). A virtual study is presented within the...
Motion control of robot manipulators is typically accomplished by sensing and regulating the positions of the joint actuators to cause the end-effector to follow a programmed trajectory. Unfortunately, position control schemes usually...
An analytical impedance model and a small-signal equivalent circuit are derived for the impedance spectra of Li-air batteries with porous cathodes. The model takes into consideration the effects of the oxygen diffusion, double layer, and...
Nowadays the medium-voltage dc system (MVDC) has been proposed in the renewable energy collector fields, long distance power transmission, small-scale industrial networks and all-electric shipboards due to its relatively higher...
From an agency's perspective, having an Actuated Signal Controller that is interchangeable with a controller from a different manufacturer provides the agency with more options and does not get the agency locked with one specific...
The aim of the thesis is to include a Field Programmable Gate Array (FPGA) based electromagnetic transient simulation into a Real-time Digital Simulator (RTDS) power system simulation. This will enable the simulation of high-frequency...
In this thesis, three different RF coils were investigated for their application in Magnetic Resonance Imaging (MRI). We developed transmit/receive birdcage volume coils since they provide better B1 field homogeneity than other coils....
In recent years there has been an explosive growth in the number of wireless users, particularly in the area of mobile communication. In future, wireless mobile systems will be more sophisticated and more widespread. This growth has...
The microstructure of the catalyst layer in proton exchange membrane fuel cells (PEMFCs) greatly influences the utilization of the catalyst (Pt) and the overall cell performance. Research focused on two key components in optimizing the...
Power Electronic-based Distribution Systems (PEDS) can provide excellent features such as load regulation, high power factor, and transient performance; especially in the large scale grids which are highly penetrated with the renewable...
It has been clear in the recent decades that there is an urgent need to progress towards renewable energy. There are few established technologies that provide a suitable economic option. These include hydropower, solar, wind, geothermal, ...
Estimation of a dynamical system under unknown influences is always subjected to uncertainty. Thus, reducing the estimation variance under external influences is absolutely desired and becomes the motivation for the field of System...
A physics-based model is proposed for the simulation of Li-air batteries. The model is carefully calibrated against published data and is used to simulate standard Li-air batteries with nonaqueous (organic) electrolyte. It is shown that...
The consumption of electricity is seen by society as a certainty and not an uncertainty; however, there are several uncertainties about how the topology of the electrical grid will look in the future. For instance, it is expected that...
Understanding of the transport phenomena in Li-air batteries is crucial for improving the performance and design of Li-air batteries. In this dissertation, the basic transport equations that govern the operation of Li-air batteries are...
The current trend for naval destroyer-class ships is the move toward DC distribution systems as the next generation of ships is developed. The main motivation for using DC is to increase the power density of the ships to accommodate...
Nuclear Magnetic Resonance (NMR) field mapping is a highly accurate tool that can be used to determine the homogeneity of the magnetic field of a strong laboratory magnet. Typically, an NMR signal is observed from a small experimental...
This dissertation addresses the development of efficient digital filter implementation techniques. Measures for area, latency, and throughput are used to quantify the benefits of the proposed implementation schemes, as well as...
Common military radar systems transmit sophisticated pulse compression waveforms for range information. Although much progress has been made in suppressing the platform radar cross section to avoid detection by enemy active radar, little...
Electrical power systems utilizing electromagnetic devices, namely those of electrical ships, are subject to nonlinearities from regenerative loads, distributed energy storage systems, and onboard loads such as air handling and fluid...
The proper intensity and chromaticity of traffic signals and signs play a key role in the safe management of the traffic environment. Light Emitting Diode (LED) becomes the most important light emitting device for traffic signals and...
The performance of the electric power system determines the cost-effective and reliable energy supply to maintain operations in a city. Electric power system performance improvement is important for utility companies in different aspects...
My dissertation researches are on the field of fuel cell materials and fuel cell modeling. During my dissertation research, I authored two US patent applications and have developed several innovative approaches to new fuel cell materials...
Since their discovery by Iijima in 1991 carbon nanotubes have been used in many novel applications of nanotechnology. Carbon nanotubes thin films in particular can be used to create, among others, anti-reflection coatings or stretch...
Shapes of boundaries can play an important role in characterizing objects in images. Shape analysis involves choosing mathematical representations of shapes, deriving tools for quantifying shape differences, and characterizing imaged...
A robust and computationally efficient technique is developed for the design of fluctuation resistant structures (fault-tolerant) semiconductor devices. This technique can be applied to the computation of the doping profiles that...
After Felix Bloch’s observation in 1946 that nuclei inside an atom behave like a magnet, there were many people who got interested in this theory, which ultimately led to the discovery of Nuclear Magnetic Resonance (NMR) technique....
As land-based robotic missions to Mars have increased in scope and mobility, NASA has intensified its research efforts involving the mechanisms of electrostatic charging on the surface of Mars. The primary concern is that electrostatic...
Mines pose a major threat to the fleet. Finding and clearing minefields is an extremely important but difficult task. In response, systems have been produced to scan the sea floor for mines. A tow fish, used in mine countermeasures by...
Quantum mechanical effects on fluctuations in ultrasmall semiconductor devices are studied. Quantum mechanical effects are included in the analysis by using the density gradient model, for which the main parameters ~effective masses! are...
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