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Articles 1 - 19 of 19
Full-Text Articles in Engineering
Chemotaxis Of Drosophila Glia With Controlled Microenvironments, Cade Beck
Chemotaxis Of Drosophila Glia With Controlled Microenvironments, Cade Beck
Dissertations and Theses
No abstract provided.
Technologya Nd Protocolsf Or Translational Researchin Electricals Timulation, Asif Rahman
Technologya Nd Protocolsf Or Translational Researchin Electricals Timulation, Asif Rahman
Dissertations and Theses
"Noninvasive electrical stimulation techniques like transcranial direct currents stimulation (tDCS) have been demonstrated to modulate neural function. Weak constant current is applied via scalp electrodes leading to subthreshold changes in neuron membrane potentials. Neuromodulation of the cortex using direct current (DC) stimulation may be a viable treatment for neurological disorders, enhancing cognitive function as well as facilitating neural plasticity. Theoretically, tDCS can employ many electrodes montages to emphasize directionality, focality, or intensity (Datta 2008, 2009, Dmochowski 2011) but what remains unclear is how these parameters influence cortical neurons considering their orientation and the local synaptic circuit in the region of …
Life-Cycle Optimization And Flow Control In A Nickel-Zinc Flow Assisted Battery, Steve Lever
Life-Cycle Optimization And Flow Control In A Nickel-Zinc Flow Assisted Battery, Steve Lever
Dissertations and Theses
Nickel-Zinc flow-assisted rechargeable batteries are currently being explored as a potential new generation of large-scale, low-cost energy storage devices. The viability of a commercial nickel-zinc battery has been hindered by the well-known phenomena of dendrite formation and zinc morphology variation over time. Applying electrolyte flow to traditional nickel-zinc battery systems has demonstrated significant life cycle performance improvements by reducing both dendrite formation and morphological variation. It has also been demonstrated that periodic low-current reconditioning discharge further improves cycle life. This thesis examines the effect of eliminating electrolyte flow during discharge of nickel-zinc flow assisted batteries, which would allow a much …
Equilibrium Conditions Of Hydrate-Forming Pickering Emulsions, Radha Ambekar
Equilibrium Conditions Of Hydrate-Forming Pickering Emulsions, Radha Ambekar
Dissertations and Theses
A key factor in hydrate risk management for an oil-governing system is the stability of the emulsified water with gas hydrate formation. The kinetics of formation of cyclopentane hydrates is investigated in a water-in-oil emulsion using differential scanning calorimetry with the effect of surfactant Span 80. In a classical DSC experiment, an emulsion sample is subjected to a regular cooling and heating cycle between temperatures that include freezing and melting of the dispersed droplets. New phase equilibrium data of (cyclopentane hydrate + water 60:40) emulsions, in the concentration range from 0.1 to 2% of Span 80, is determined at atmospheric …
Design And Development Of A Low Cost And Lightweight Laser Rangefinder, Miguel Lopez
Design And Development Of A Low Cost And Lightweight Laser Rangefinder, Miguel Lopez
Dissertations and Theses
No abstract provided.
Effects Of Mild Heating On The Osteogenic Differentiation Of Human Mesenchymal Stem Cells During Inflammation, Kristifor Sunderic
Effects Of Mild Heating On The Osteogenic Differentiation Of Human Mesenchymal Stem Cells During Inflammation, Kristifor Sunderic
Dissertations and Theses
"Current surgical procedures to treat osteoarthritis have varying degrees of success, but carry inherent risks and a finite life expectancy. A more permanent solution is a treatment that regenerates biologically viable tissue that integrates with the patient and retains functionality. For maximal effectiveness, such a treatment should also repair bone loss known to occur in osteoarthritis and attenuate chronic inflammation that can obstruct healing. Mesenchymal stem cells have great potential to be used as part of a novel therapy for bone and cartilage regeneration. They are a highly regulated, self-renewing population of cells with potent mechanisms to avoid allogeneic rejection, …
Study Of Air Bubble Injection Into Laminar And Turbulent Water Flow Through An Annular Test Section, Debbrata Das
Study Of Air Bubble Injection Into Laminar And Turbulent Water Flow Through An Annular Test Section, Debbrata Das
Dissertations and Theses
Injection of bubbles into a vertical upward flow of water in an annular flow channel was studied experimentally under laminar and turbulent conditions. In order to measure the size and shape of the bubbles, a flow visualization system was set up in a vertical test section with a high speed video camera. A PIV measurement technique was also used to determine laminar and turbulent velocity profiles in the liquid stream. In this study, an efficient image processing methodology was used to obtain the velocity profiles, bubble size, shapes and trajectory at different Reynolds numbers. The measured velocity profiles matched theoretical …
Formulation & Thermophysical Analysis Of A Beeswax Microemulsion & The Experimental Calculation Of Its Heat Transfer Coefficient, Ravi Ramnanan-Singh
Formulation & Thermophysical Analysis Of A Beeswax Microemulsion & The Experimental Calculation Of Its Heat Transfer Coefficient, Ravi Ramnanan-Singh
Dissertations and Theses
Experimentation and implementation of Phase Change Materials (PCM) as suitable Thermal Energy Storage (TES) mediums has garnered greater attention in recent decades. PCMs have the ability to not only store Sensible Heat (SH) within a given temperature range, but also store large amounts of Latent Heat (LH) as they undergo a phase change, whether it is from solid to liquid or liquid to gas. This investigation examines the preparation of a beeswax microemulsion, the analysis of its thermophysical properties, and the experimental method to calculate its heat transfer coefficient under laminar flow conditions. First, the beeswax microemulsion was formulated to …
Exploration Of The Endothermic And Exothermic Reactions Of Calcium Oxide And Magnesium Oxide And Design Of A Vessel For A Thermochemical Heat Storage System, Jorge Pulido
Dissertations and Theses
A high temperature Thermal Energy Storage (TES) system has been investigated for use in solar thermal power plants or in vehicles to preheat the engine and/or the cabin in cold weather. The idea is to store surplus thermal energy and then release it on demand to heat a working fluid. The stored heat can be used to generate electricity after sunset or to meet the peak loads. These would lead to an improvement in energy efficiency, reductions in energy imports from foreign sources and total energy-related emissions. The basic operating principle involved in the TES system is a thermochemical reaction …
A Study Of The Electrocoalescence On Spherical Droplets In A Flow Focusing Juction Microchannel, Shady A. Habib
A Study Of The Electrocoalescence On Spherical Droplets In A Flow Focusing Juction Microchannel, Shady A. Habib
Dissertations and Theses
No abstract provided.
Feasibility Analysis Of Estrification Systems With Entrainers, Kang Wook Lee
Feasibility Analysis Of Estrification Systems With Entrainers, Kang Wook Lee
Dissertations and Theses
(Ethyl Acetate) and IPA (Isopropyl Acetate) production systems are studied in terms of the feasibility analysis. It is not feasible to retrieve pure products by a simple reactive distillation for IPA production system because CCR (Critical Composition Region) covers the entire desired binary edge for IPA system. On the other hand, even though CCR does not cover the entire desired binary edge of the EA system completely, internal reflux ratio (IRR) analysis does not allow the production of the pure product via reactive distillation for EA production system. To overcome the restraints, external entrainers are utilized to take advantage of …
The Role Of Rugose, A Drosophila Akap And Loco, A Rgs Protein In Synaptogenesis And Development, Kemeh Georgina
The Role Of Rugose, A Drosophila Akap And Loco, A Rgs Protein In Synaptogenesis And Development, Kemeh Georgina
Dissertations and Theses
No abstract provided.
Characterization Of Rheological Properties And Degradation Of Genipin Crosslinked Fibrin Hydrogel For Annulus Repair, Dave Khyati
Characterization Of Rheological Properties And Degradation Of Genipin Crosslinked Fibrin Hydrogel For Annulus Repair, Dave Khyati
Dissertations and Theses
No abstract provided.
Development Of A Human Lung Cancer Cytochrome C-Gfp Reporter Cell Line To Study Anti-Cancer Drug Responses In Apoptosis Pathways, Sidra A Piracha
Development Of A Human Lung Cancer Cytochrome C-Gfp Reporter Cell Line To Study Anti-Cancer Drug Responses In Apoptosis Pathways, Sidra A Piracha
Dissertations and Theses
"Currently chemotherapy and radiotherapy are the most popular methods for cancer treatments after surgery, but lack of specificity and are thus toxic to the healthy human cells. Studies have shown that targeted therapies have been linked to activation of apoptosis signal pathways (cascade of caspases) in cancer cells including intrinsic and extrinsic pathways. One of the major pathways leading to caspase activation involves the release of cytochrome-c from mitochondria. However, in some tumor cells this pathway is inactivated due to the mutation of mitochondria membrane stabilizing proteins (e.g. Bcl-2, Bcl-xL). Therefore, the overall objective of this proposal was to understand …
Neural Correlates Of Phantom Auditory Perception, Paul Joseph S. Deguzman
Neural Correlates Of Phantom Auditory Perception, Paul Joseph S. Deguzman
Dissertations and Theses
No abstract provided.
Hydrate Formation Using Dowfax Gemini Surfactants, Franchette Viloria
Hydrate Formation Using Dowfax Gemini Surfactants, Franchette Viloria
Dissertations and Theses
"Gas hydrate formation is a stochastic and slow process. However, the use of a small amount of surfactant can speed up the rate of hydrate formation. This work investigates the effect of two Dow surfactants, Dowfax 2A1 and Dowfax C6L, on gas hydrate formation, first by determining the adsorption isotherms via liquid-liquid titration methods, and then investigating the role in methane hydrate formation in a non-stirred batch reactor. Both surfactants have almost similar structure, sharing doubly charged headgroups, but these surfactants express different effects on hydrate formation. 2A1 and C6L both show monolayer formation at around concentration of 1.0 mM; …
Object Detection And Recognition For Visually Impaired People, Shuihua Wang
Object Detection And Recognition For Visually Impaired People, Shuihua Wang
Dissertations and Theses
"Object detection plays a very important role in many applications such as image retrieval, surveillance, robot navigation, wayfinding, etc. In this thesis, we propose different approaches to detect indoor signage, stairs and pedestrians. In the first chapter we introduce some related work in this field. In the second chapter, we introduced a new method to detect the indoor signage to help blind people find their destination in unfamiliar environments. Our method first extracts the attended areas by using a saliency map. Then the signage is detected in the attended areas by using bipartite graph matching. The proposed method can handle …
Printed Complaint Electrochemical Systems, Abhinav Machhindra Gaikwad
Printed Complaint Electrochemical Systems, Abhinav Machhindra Gaikwad
Dissertations and Theses
No abstract provided.
Lattice Boltzmann Simulation Of Binary Drop Coalescence At Low Weber Number, Lina Baroudi
Lattice Boltzmann Simulation Of Binary Drop Coalescence At Low Weber Number, Lina Baroudi
Dissertations and Theses
"A numerical study has been performed using a lattice Boltzmann method (LBM) for an incompressible binary fluid based on the Cahn-Hilliard diffuse interface approach to investigate the early-time coalescence dynamics of two liquid drops. The two drops approach each other at a very low Weber number (We) and the coalescence process is driven by surface tension. When the two drops come into contact, the curvature diverges and causes infinitely large surface tension forces, leading to the formation of a rapidly growing liquid bridge. Depending on the forces that govern the widening of the liquid bridge, the coalescence dynamics can be …