Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 171 for “"applied voltage"”.
-
An investigation on the effect of solution concentration, applied voltage and collection distance on electrospun fibres of PVA solutions
… parameters including increasing concentrations, applied voltage and collection distance using poly (vinyl alcohol) (PVA) solutions on the fibre diameter and morphology of electrospun nanofibres. PVA solutions of 4%, 6% and 8% of mass percentage were used. The diameter and morphology of nanofibres …
-
"Some properties of silicon p-""i""-n diodes compensated with gold"
… is very nearly proportional to the cube of the applied, voltage. At still higher injection levels the current develops an oscillatory component whose frequency can vary between 5 and 100 MHz depending on the gold concentration in the ""i"" region of the devices. From illumination of the devices …
-
A model for sample stacking in microcapillary DNA electrophoresis
… of the major electrolytes in the system. The applied voltage and the conductivity profile determine the local electric field. The electric field drives the analyte transport. The analyte consists of DNA molecules of various fragment sizes. Since the DNA concentration is smaller than the …
-
Nanofluidic system for single molecule manipulation and analysis
… of single [lambda]DNA molecules. Factors such as applied voltage bias, DNA concentration, and dimensions of the channel were found to affect the frequency of translocation events and signal-to-noise ratio, which are critical factors for implementing multiple measurements on the same molecule with …
-
Dynamics of High- and Low -Pressure Plasma Remediation
… mixture for the generation of the XeCl*. Higher applied voltage improves both the intensity and efficiency of UV photon generations. The strong attachment at high Cl2 concentration (e.g., ≥5%) leads to electron shell propagation to smaller radii after the voltage pulse.
-
A Combined Piezoelectric Composite Actuator and Its Application to Wing/Blade Tips
… position of the actuator along the chord and applied voltage because there is no centrifugal force. For an active blade tip subject to incompressible flow and 2D quasi steady airloads, its twist angle is related not only to aerodynamic moment and applied voltage but also to coupling terms, …
-
Engineered Platforms for the Development of Electroporation-based Tumor Therapies
… they can safely treat without increasing the applied voltage to an extent that induces thermal damage or muscle contractions in patients. A method to increase ablation size safely is needed. To make this advancement and to advance other cancer treatments as well, better in vitro tumor models …
-
Design and Characterization of Biomimetic Artificial Hair Cells in an Artificial Cochlear Environment
… of 177*10^-6 Nm/rad. Results with 0 mV potential applied across the bilayer indicate that current generation at 0 mV likely comes from other sources besides the bilayer. Increasing the voltage potential increases the broadband power output of the system, with an approximately linear relationship. …
-
Numerical Methods for the Wigner-Poisson Equations
… of older simulations. Iterative methods are applied to the linear and nonlinear problems in these simulations to reduce the computational memory and time required to calculate solutions. Initially the focus of the research involved updating time-integration techniques, but this switched to …
-
Dynamic performance of small diameter tunnel thrusters.
… tunnel thruster is studied for step changes in applied voltage to the thruster motor. Previous work on positioning Remotely Operated Vehicles with a ducted propeller had shown that lags in the thruster response caused limit cycling in the vehicle's behavior. These experiments have shown that the …
-
Resistive switching in Pt/TiO 2 /Pt
… In this thesis the characteristic current-voltage (I-V) hysteresis in three different states of TiO2, pristine, URS-activated, and BRS-activated states, was investigated and understood in terms of the migration of oxygen vacancies in TiO2. The I-V hysteresis of pristine TiO2 was found to …
-
SMA-induced deformations in unsymmetric cross-ply laminates
… relating the shape of the laminate to a force applied on supports fastened to the laminate are derived. Induced strains and displacements are predicted as a function of the applied force. Experiments where the force is generated by known weights are conducted. Good correlations are established …
-
Rotational speed dependent motor properties
… at high rotational speeds, which acts against applied voltage and drops motor efficiency steeply. By reducing the magnetic flux surrounding the coil of the stator, back EMF can be reduced and motor efficiency can be maintained at any rotational speed. Several prototypes that take advantage of …
-
Optimizing mixer geometries for dielectrophoretic micro-concentrators
… under high flow rates (-200 /l/min) with 20 Vpp applied voltage. In particular, the optimal geometries of micromixers for the device are investigated and determined by simulations and experiments. The optimal micromixer-enhanced concentrator exhibits up to 1.5 x improvement in trapping efficiency …
-
Nonlinear optical studies of dye-doped nematic liquid crystals
… behavior with respect to the magnitude of the applied electric field. This threshold behavior was observed both in forced light scattering experiments and polarization holographic experiments. We believe that the origin of this threshold lies in the process of photogeneration, which was found …
-
The effect of a DC voltage on the catalytic combustion of natural gas in air over platinum
The effects of a DC voltage on the catalytic combustion rate of natural gas in air over a platinum wire in various configurations is examined. In most cases a high applied voltage reduces and quenches the catalytic reaction. These effects are dependent on the catalyst surface charge density but not …
-
Slab-Geometry Molecular Dynamics Simulations: Development and Application to Calculation of Activity Coefficients, Interfacial Electrochemistry, and Ion Channel Transport
… computer simulation were tested, compared, and applied to the prediction of activity coefficients, interfacial electrochemistry characterization, and ion transport through a model biological channel-membrane structure. The charged-sheets, 2-D Ewald, corrected 3-D Ewald, and corrected …
-
Design, analysis and optimization of novel photo electrochemical hydrogen production systems
… rate of chlorine and hydrogen production. The applied voltage, reactor temperature, and current density have a significant effect on the rate of hydrogen production. The optimal brine concentration is 225 g/L and the optimal electrolyte concentration is 25g/450ml. The increasing temperature …
-
PMN/PT and rutile LAC voltage breakdown dependency with respect to backfill gas, voltage rates of rise, and pressure
… a few gasses, pressures and rates of rise of the applied voltage. Through this thesis a more comprehensive look into the breakdown behavior of these LACs and how they respond to varying pressure, different backfill gasses and three different ramp rates will be investigated. This investigation will …
-
Analysis of Polyethylene Glycol in the α-Hemolysin Nanopore
… the effects of ionic strength, PEG size, and applied voltage on the depth and duration of the current blockades. We also apply autocorrelation analysis on the arrival times of PEG molecules to the pore see if we can identify if the PEG is translocating through the pore or escaping from the …
Page 1 of 9