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.
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Showing 1 to 20 of 103 for “"rise time"”.
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Design, Construction, and Operation of a Fast Rise Time, High Voltage Pulse Generator
Made available in DSpace on 2017-07-06T18:59:00Z (GMT). No. of bitstreams: 2 Stygar_William_A_MS.pdf: 39230253 bytes, checksum: 2e326b306be997fb69d8c55105b1ce45 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1980
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The environmental effect on corrosion fatigue behavior of austenitic stainless steels
… a multivariate challenge that threatens the lifetime of service of nuclear power plant materials, especially austenitic stainless steels. Both enhancement and retardation of crack growth have been observed in laboratory tests. This thesis work performs high temperature autoclave testing, …
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Global momentum confinement times in Alcator C-Mod H- and I- regime plasmas
… fit was used to determine a single variable for rise time in rotational velocity. The hyperbolic tangent fit parameter acts as a proxy for the global momentum confinement time, which is then compared to other plasma parameters. Through this compaxison, we found an decrease in rise time in …
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AC motor speed performance improvement using fuzzy logic control
… phase induction motor because it can reduce the rise time, settling time, peak time and overshoot to 0.10s, 0.17s, 0.29s and 0.09 % OS respectively. The comparison between fuzzy logic controller and PID controller shows that the fuzzy logic controller gives better performance response with the …
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Expression and Function of Alpha3 and Beta2 Neuronal Nicotinic Acetylcholine Receptor Subunits in HEK-293 Cells
Single-cell real-time quantitative RT-PCR was used to characterize the mRNA expression of rat neuronal nicotinic acetylcholine receptor (nAChR) subunits α3 and β2 in CA1 hippocampus stratum radiatum and stratum oriens interneurons. α3β2 co-expression was detected in 43% of interneurons analyzed. …
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Modeling and prediction of sunspot cycles
… next cycle maximum, the next cycle minimum, the time from the initial minimum of a cycle to its maximum, called the rise time, and the time from a cycle maximum to the next cycle minimum, called the fall time. The predictions are based on sunspot numbers just far enough into a new cycle to …
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Optical Pumping of Dye Lasers Using an Array of Plasma Pinches
… pinches is employed to pump, for the first time, a variety of dye lasers. The plasma pinch is formed in a hollow cylindrical shape by electrically discharging a high-energy capacitor bank ((TURN)14 kJ) through a device containing a few torrs of hydrogen, deuterium or nitrogen gas. A dye …
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The role of sodium-calcium exchanger in the electrical activity of embryonic chicken heart
… have significant effect on the amplitude and the rise time of AP. We found out that changes in duration of AP were less in atrium in early stages of development and increased during later stages of development. Interestingly these results were opposite in ventricles where increase in duration of …
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Neuromodulation of Inhibitory Activity in Thalamocortical Circuits
… F2 terminals. In contrast, TRN neurons give rise to only axonal, F1 outputs. My data indicate that the rise time, slope and half-width of miniature ISPCs (mIPSCs) recorded in dLGN relay neurons have greater variance than those recorded in ventrobasal nucleus (VB) neurons. It is important to …
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Numerical and Experimental Study of the Trichel Pulses in Needle-plane Geometry
… frequency, average DC current and pulse rise time was investigated. The studied parameters include coefficients of the two ionization, and attachment reactions, the mobilities of the three charged species considered, electrons, positive ions, and negative ions, and the coefficient of the …
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Physical Function and Body Composition in Obese Women in a Clinical Weight Loss Program
… measures were obtained (gait speed, chair rise time, VO2peak, grip strength, and 1-RM leg press). Pearson product correlations among physical function tasks and body composition measures were examined. Gait speed was not significantly correlated with any body composition component or other …
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Hybrid fuzzy-proportionl integral derivative controller (F-PID-C) for control of speed brushless direct current motor (BLDCM)
… trial and error and performance parameters are rise time, settling time and overshoot. The findings show that the trapezoidal membership function give good results of short rise time, fast settling time and minimum overshoot compared to others for speed control of the BLDC motor.
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Hybrid fuzzy- proportionl integral derivative controller (F-PID-C) for control of speed brushless direct curren motor (BLDCM)
… trial and error and performance parameters are rise time, settling time and overshoot. The findings show that the trapezoidal membership function give good results of short rise time, fast settling time and minimum overshoot compared to others for speed control of the BLDC motor.
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Surface-Enhanced Spectroelectrochemistry using Synchrotron Infrared Radiation
… are fundamentally limited by the finite rise time of the electrode. For many important processes with characteristic timescales in the milli- to microsecond regime, achieving a suitably low rise time requires the use of an electrode with critical dimensions in the hundreds of micrometers, …
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Design of a 15MW Solid-State Linear Transformer Driver for Gas Switch Triggering Applications
… the advent of solid-state LTD technology, fast rise-time high energy applications in nuclear science and plasma physics experiments are possible. This has led to the design and development of a 30kV and 500A solid-state LTD. The designed LTD can achieve a rise-time under 10ns and has a high …
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Power sharing strategy using H∞ controller between two distributed generation sources in islanded mode
… and fast restored frequency within 0.002 s with rise time 0.05s while compared to 0.13 s rise time for existing secondary controller. Maximum overshoot is also reduced during the suddenvi load changed and good tracking performance efficiency by 95% as compared to the 90% efficiency of existing …
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Power sharing conditioning control in single-phase parallel distributed generations with simple improvement of droop control
… and frequency to nominal values within a limited time and to ensure the proper power sharing between the DGs considering based on the rating of energy source. The performance of the proposed controller is implemented in MATLAB/Simulink software and compared by two simulation tests under two …
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A unique electric discharge-excited solid state x-ray laser
… is that the x-ray energy can be several times the energy of the bombarding ions, suggesting a strong nonlinear mechanism. Such emission was observed during a glow discharge operation in the pressure range 0.1-5.0 torr with a cathode/anode separation of ~4.0 mm. This discharge operates at …
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Robot gripper control system using PVDF piezoelectric sensors
… much as 900% improvement in force step response rise time, and 300% reduction in overshoot are possible by inclusion of the PVDF sensor.
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Pulse shaping techniques for mega ampere current on Atlas pulsed power machine
… generated by Atlas is a damped sinusoid that rises to nearly 30 MA in 6 microseconds as it flows through the load (target). The models developed here evaluate the Atlas reconfiguration in order to obtain a compressed pulse with a much faster rise-time for magnetic compression experiment, and …
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