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Recent studies have shown that the incorporation of carbon nanotubes (CNT) in to carbon fiber composite parts significantly increase mechanical as well as thermal properties. Polymer nanocomposites are polymer matrix composites that...
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...
To transfer the incredible properties, including ultrahigh tensile strength, Young's modulus, and electrical conductivity of an individual carbon nanotube (CNT) into composite applications, the constituent nanotubes need to possess...
As demand for more efficient and higher-performing aerospace platforms increases there is a need to address challenges that have been left unsolved through a more comprehensive understanding of the complex flowfields and the underlying...
Recent increased popularity in plug-in hybrid electric vehicles (PHEVs) has been influenced by their ability to relieve the economic dependence on oil, meanwhile reducing the carbon footprint through the decreased level of harmful...
The increasing interest and gradual adaptation of a DC electrical distribution system by the US navy and smart grid designs has demanded a change to the structure of the traditional electrical distribution system. The development of the...
Nb 3 Sn conductors are important candidates for high-field magnet applications for Future Protonor Muon Colliders, and they continue to be widely used for many laboratory and NMR magnets. However, the critical current density, J c, of...
As composite materials gain wider acceptance within the transportation industry, it is pertinent to investigate the available coating processes with a view to reduce emissions and associated costs. Current painting processes are not only...
Top-down fabrication is widely used for producing micro to nanometer scale features for biomedical applications. Opposed to bottom-up approach, it is superior to control geometry, structure and composition of the product. Traditional top...
Mechanical and Electrical Characterization of Critical Current Density in Round and Rectangular Reinforced Bi₂Sr₂CaCu2O₈₊ₓ Wires for High Field Magnet Applications
In recent years there has been a large push for magnet technologies extending into the 20 to 30 T range. High field solenoids can be made using resistive materials like Cu, however the resistive losses associated with Cu electromagnets...
Advanced composites which offer robust mechanical properties are being increasingly used for structural applications in the aerospace, marine, defense and transportation industries. However, the anisotropic nature of composite materials...
Impinging supersonic microjets have been studied experimentally where both surface pressure and shear stress measurements and flow-field visualizations have been obtained. Microjets with diameters of 400 and 1000 microns have been...
Hurricane Andrew (1992) caused one of the largest property losses in U.S. history, but limited availability of surface wind measurements hindered the advancement of wind engineering research. Many studies have been conducted on regular...
Extracellular vesicles (EVs) or exosomes are responsible for a variety of signaling processes and overall physiological and pathological states of stem cells and tissues. Human induced pluripotent stem cells (hiPSCs) have unique...
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...
Advanced ceramics and ceramic composites have a variety of advantageous properties, such as high hardness, strength, and wear resistance. This makes them good candidates for materials in the aerospace, automotive and defense industries, ...
Aerodynamics of road vehicles have continued to be a topic of interest due the relationship between fuel efficiency and the environmental impact of passenger vehicles. With the streamlining of ground vehicles combined with years of...
Coronary Heart Disease (CHD) is one of the deadliest heart diseases in the United States. CHD is described as the narrowing of capillaries. Risk factors that contribute to this disease are smoking and stress. In the Cappendijk Lab, the...
Structural Health Monitoring (SHM) systems have been studied by engineers and researchers for years [1-7], yet the applications of Triboluminescence (TL)-based SHM system for aerospace and civil structures are to a degree unexplored....
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....
Hurricane risk assessment is an important research topic: accurate estimation of the potential loss helps guide mitigation efforts to decrease the loss in the future. In the past decade, researchers working on the loss analysis tried to...
Energy has become a much needed commodity throughout the world; as such, the development of environmentally safe fuel sources is of great importance. Agricultural residues (cellulosic material) are turning out be an attractive source for...
The overall goal of this thesis was to provide a quantitative analysis of the operational and safety performances of roundabouts. The operational analysis of Florida roundabouts was conducted to determine the base capacity of different...
Power hardware-in-the-loop (PHIL) is a powerful technique that allows researchers to test hardware under different operating conditions and environments.PHIL creates a closed-loop environment, where a single physical device is coupled to...
Isotactic poly(propylenes) (iPPs) are found to display profound melting kinetics at temperatures well below the apparent melting point. This unexpected behavior has not been observed earlier in semicrystalline polymers. This work...
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...
Industrial manufacturing processes can experience a variety of changes to important quality characteristics as a result of tool breakage, tool wear, introduction of new raw materials, and other factors. Statistical process control charts...
Traditional light emitting diodes (LEDs) involve a complicated device structure with multiple layers stacked over one another. Such a complex, multilayered architecture restricts the application of diverse fabrication techniques. Earth...
In this study, several of the conditions that affect the formation of hydrogen peroxide in a tubular plasma reactor were analyzed. Specifically, the initial conductivities of the inlet deionized water and the type of salt solutions...
Precast prestressed concrete members are widely used in civil engineering structures around the world with growing demand in the last few years due to the rapid urbanization and industrialization driving an increase in infrastructure...
Conductive materials are indispensable for almost all aspects of life. However, conventional metal conductors have some drawbacks including heavy weight and corrosion issues. Carbon nanotubes (CNTs) are promising as an alternative...
Underwater vehicles suffer from reduced maneuverability with conventional lifting appendages due to the low velocity of operation. Circulation control offers a method to increase maneuverability independent of vehicle speed. However, ...
Being the interface between Energy Storage Element (ESE) and DC bus in Fuel Cell Vehicle (FCV), the high power density bidirectional dc-dc converter is an essential component of the energy management system. In this dissertation, two...
Traditional experimental design techniques have long been employed in industrial, agricultural, and other physical settings to characterize and optimize systems and processes. Such physical systems are characterized by random error, ...
The objectives of this work are to determine the extent to which intracellular metabolite diffusion limits aerobic metabolism and hence dictates cellular dimensions and metabolic organization. The particular focus is on the reaction and...
It is desirable to use nanostructured composites to produce high-strength, high-conductive materials for magnet development. In this research, severe plastic deformation (e ≥ 2.0) is used to produce nanostructured Cu-Ag composites in an...
Organic-inorganic halide perovskites have received significant attention as a promising opportunity for low-cost, high-performance optoelectronic devices, such as solar cells, photodetectors, and light-emitting diodes due to their...
The first goal of this study was determining in-situ soil's vertical saturated hydraulic conductivity (Ks) from the measured steady infiltration rate, initial soil parameters, and test arrangements of the Double Ring Infiltrometer (DRI)...
Liquid helium-4 undergoes a phase transition below about 2.17 K where it is called the superfluid (He II). He II is a non-classical fluid which is one of the very few macroscopic manifestation of the quantum mechanics. He II entails...
The goal of this research is to fabricate, characterize and apply the designed polymer based porous piezoelectric material into practical use. In line with the goal, the research objectives are: Select proper materials that have...
Tightly coupled microgrid power systems strike a balance between maintaining the desired power quality and insuring a high utilization efficiency of large-nonlinear loads. This is of great interest to the US Navy. Application of large...
This study embarked with focus on the analysis, to quantify the potential impacts of varying market penetration rates (MPR) of connected and autonomous vehicles (CAVs) on the traffic network mobility and safety in construction work zones...
Ceria and zirconia ceramics are well known for their ability to conduct oxygen ions, making them useful in constructing devices such as oxygen sensors and solid-oxide fuel cells. Increasing the ionic conductivity of these materials is a...
Diffusion Tensor Imaging (DTI) provides a unique contrast based on the restricted directionality of water movement in an anisotropic environment. As such, DTI-based tractography can be used to characterize and quantify the structural...
High performance composites are currently being used in the marine, automotive, aerospace and defense industries. These industries demand materials with properties that are similar or better than conventional metals at a fraction of the...
MRI magnets are constantly evolving with technologies for higher fields, improving sensitivity and increasing resolution. Major achievements in MRI magnet technology in recent years include the successful construction of a 21.1-T, 900...
Intelligent morphing structures will revolutionize micro-robotics, wearable technology, and tiny electro-mechanical systems. The ideal morphing structure is thin and flexible with the ability to deform and sense its surroundings....
A microjet-based reactant delivery method was implemented in a prototype PEM fuel cell. A commercially available fuel cell was procured that utilizes a conventional reactant delivery method. The prototype was designed with an identical...
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