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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.
Localized magnetic particle hyperthermia heating treatment using ferromagnetic and superparamagnetic nanoparticles continue to be an active area of cancer research. Magnetic hyperthermia is a promising therapeutic method for treatment of...
The dissertation presents the mathematical formulation, experimental validation, and application of a volume element model (VEM) devised for modeling, simulation, and optimization of energy systems in their early design stages. The...
A new concept of thermal design to optimize the operating temperature of HTS magnets is developed, aiming simultaneously for compactness and efficiency. The optimization procedure seeks the operating temperature to minimize the power...
An experiment has been built and operated to investigate the pressure difference and the temperature variation through orifice plates in He II forced flow at bath temperatures between 1.7 K and 2.1 K. The flow of He II is generated with...
In recent years, NASA has become interested in densified fuels such as solid hydrogen. A change from liquid to solid-state fuel storage would result in an approximately 15% smaller onboard fuel tank, and thus a lower gross vehicle lift...
High Temperature superconductors (HTS) are the only way to achieve elds with superconducting magnets higher than the 25 T of Low Temperature Superconductors (LTS). No-Insulation (NI) REBCO magnets using REBa2Cu3Ox as the superconductor...
The continual study of shock wave boundary layer interactions (SBLIs) is driven by their presence on the internal and external surfaces of transonic, supersonic, and hypersonic flight vehicles. SBLIs manifest in a myriad of practical...
One of the main goals of robotics research is to give physical platforms intelligence, allowing for the platforms to act autonomously with minimal direction from humans. Motion planning is the process by which a mobile robot plans a...
The following dissertation presents the initial stages of the development of the new rollover safety assessment protocol developed for paratransit buses. Each year, the State of Florida purchases over 300 paratransit buses. In 2011, the...
A new concept for a two-phase flow-metering device has been developed and tested. The concept involves vapor-liquid two-phase flow through narrow, parallel channels which results in a laminar, stratified flow with a slope at the liquid...
This work presents two alternatives to optimize the performance of Rankine cycles. The first approach is focused on the spatial distribution of the areas used in the heat exchange process, and the second approach is intended to study the...
At the beginning of this century, some societies have shifted, or at least recognized the need to shift, towards a more renewable way of living, this shift has initiated a movement to reduce the carbon footprint, and new standards are...
This work describes a tool for configuring and analyzing the weight of combined cycle power plant, designed for shipboard applications. The effects that varying selected combined cycle parameters have on the weight and the efficiency are...
Shockwave boundary layer interactions (SBLI) occur on both internal and external surfaces and adversely affect both the structural and propulsive performance of high-speed flight vehicles operating in the trans/super/hypersonic flow...
Gasification of biomass for energy production has the potential to be a cost effective and environmentally sustainable technology. Small scale, 20-250 kWth, downdraft gasifiers have the ability to provide power from low cost regionally...
The simulation and study of fluid properties and dynamics in a microgravity environment on the Earth’s surface is of great interest due to the high costs associated with conducting research in space. Cryogenic fluids like liquid helium, ...
In this dissertation, a new adaptive harmonic selective detection algorithm is proposed for power quality improvement applications. The adaptive gains of the proposed method can be chosen relatively large to obtain faster convergence....
The air intake captures the freestream airflow and delivers it to the engine of the parent vehicle for thrust production. The shockwave boundary layer interactions (SBLI) in the intake duct play an important role in defining the flow...
Characterization of fluid with suspended nanoparticles in microchannels has been studied as a part of a microfluidic based acute myocardial infarction (AMI) detection device. The AMI detection process uses heat stabilized human serum...
The present work attempts to establish a unified path model for characterization as well as prediction of microstructure evolution, in terms of texture, in commercially pure titanium that have undergone thermo-mechanical processing. Two...
Vortex asymmetry develops on slender bodies at high angles of incidence, leading to large side-forcesand yaw moments even in symmetrical flight conditions. This unexpected side force can be large for the control surfaces to produce a...
We report measurements of the velocity fields in He II forced flow obtained by the Particle Image Velocimetry (PIV) technique, a technique which uses micron scale tracer particles to track the flow. We demonstrate that the micron size...
Transport phenomena in general, and specifically, turbulent transport are inevitable processes in environmental problems and in the function of natural and manmade systems on the earth's surface. The continuously varying solar radiation, ...
Research has shown that being able to vary the effective limb stiffness of legged robotics can aid in efficient locomotion. This is especially true when considering a variety of terrains and payloads. Recent developments have lead to...
Many leg controllers and gaits have been designed directly with lower level parameters. This approach can lead to very high performance gaits, but can also lead to platforms highly tuned for one particular application with drastically...
The Multiple Parabolic Reflector Flat Panel Collector (MPFC) was designed to heat a working fluid to a temperature of 150oC using the sun. The use of stationary reflectors and a moving receiver tube allow for maximum energy collection...
Oxygen free high conductivity (OFHC) copper was processed using equal channel angular extrusion (ECAE), drawing, swaging, or ECAE plus either drawing or swaging to a strain of 4. All processing was carried out at room temperature. The...
Irradiation induced voids and associated swelling is one of the most intriguing and technologically relevant problems in the design of structural materials for nuclear reactor components. Traditional approaches model void nucleation and...
Autonomous ground vehicles (AGVs) are expected to be used extensively in unstructured, outdoor, undulating environments for tasks such as search and rescue, homeland security, fire fighting, reconnaissance, and surveillance. These tasks...
As the only high temperature superconductor with round wire (RW) geometry, Bi2Sr2CaCu2O8+x (Bi-2212) superconducting wire has the advantages of being multi-filamentary, macroscopically isotropic and twistable. With overpressure (OP)...
Asymmetric jets are becoming more prevalent and may offer significant advantages over traditional axisymmetric nozzles for propulsion as well as fluidic mixing applications. The purpose of this work is two fold: 1) to investigate the...
Skid-steered robots are commonly used in outdoor applications due to their mechanical simplicity, high maneuverability, and robustness. The maneuverability of these robots allows them to perform turning maneuvers ranging from point turns...
The reconfiguration process for Shipboard Power System reroutes the electric power in the power system in order to achieve certain objectives, such as maximizing service restoration, minimizing power loss, optimizing power dispatch, etc....
Momentum based motion planning allows small and lightweight manipulators to lift loads that exceed their rated load capacity. One such planner, Sampling Based Model Predictive Optimization (SBMPO) developed at the Center for Intelligent...
An experimental study was undertaken whereby the effects of significant cavity three-dimensionalities on the flowfield and acoustic properties were addressed. A highly three-dimensional cavity having both diverging side walls, and a...
Morphologic Influence of High Magnetic Fields on the In-Situ MOCVD (Metal Organic Chemical Vapor Deposition) of Xylene-Ferrocene Nanotubes and Structures
To investigate the effect of high and low magnetic fields on the control of structure and morphology of carbon nanotubes, a unique in-situ MOCVD (Metal Organic Chemical Vapor Deposition) facility is constructed and tested for a variety...
Active flow control can achieve substantial performance gains and meet the challenges of next-generation air vehicles and energy harvesting devices. The use of active flow control techniques with the deflecting flap or morphing surfaces...
Active flow control actuators have been studied rigorously by the aerodynamic community and developments have led to a wide variety of devices with various features and operating mechanisms. The design requirements for a practical...
An experiment has been built to investigate heat transfer in He II forced flow of velocities up to 22 m/s, which is an order of magnitude larger than in previous experiments. Pressure drop, steady-state and transient heat transfer have...
The present study reports a numerical heat transfer approach, an effort devoted to defining a cooling concept for a high performance synchronous motor that has a High Temperature Superconductor (HTS) field winding. A lumped-circuit...
The objective in conducting this thesis was the improvement of porous Solid Oxide Fuel Cells (SOFCs) structures. It is known that changes in porosity and pore geometry affect the rate of mass transport of the reactant gases through...
The static synchronous compensator (STATCOM) is increasingly popular in power system application. In general, power factor and stability of the utility system can be improved by STATCOM. Specifically, STATCOM can stabilize a given node...
This dissertation is concerned with the development of a new protection philosophy and methodology applicable to ship characteristic power systems (ac part) for fault detection and isolation. A wide area differential protection system...
This research is to investigate the performance of mini and micro devices driven magnetically through simulations and experiments. Micro-Electro-Mechanical Systems (MEMS) invoking magnetic coupling were designed and tested. Scaled up...
Fuel cell technology is currently showing itself as a promising alternative for clean energy production due to its high efficiency and minimum environmental impact. However, its high cost is still a challenge that prevents this...
The design of a unique liquid nitrogen pumping station requires a unique pressure relief valve. This new relief valve must operate at low pressure differentials, work effectively at low cryogenic temperatures, and release a wide range of...
This research studies the fabrication and characterization of doped Hg-1212 and Hg-1223 superconductors grown on silver substrates using dip-coating and pulsed laser deposition (PLD) techniques. The main goal of this thesis is to...
It has been documented that heat is generated during friction stir processing. The amount of heat generated between the shoulder and the work piece during friction stir processing dictates the quality of the processed zone. Hence...
Efficient fabrication of seamless RF cavities by hydroforming requires the use of very fine microstructure. In this study, grain refinement of commercial purity (99.99%) niobium was carried out by equal channel angular extrusion (ECAE)...
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