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 22 for “"Current limit"”.
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Green's function analysis of bunched charged particle beams
… magnetic focusing field. We derive a maximum limit on the effective self-field parameter ... necessary for confining the bunched beam, where wp, is the effective plasma frequency and at is the cyclotron frequency. The RCM model extends the analysis of the NRCM model to incorporate relativistic …
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The design of a high precision, wide common mode range auto-zero comparator
… are essential building blocks within the current limit detection schemes of Hot Swap controllers. However, the current limit detection scheme places a sense resistor in the current path, burning static power. Reducing this power consumption while maintaining the overall accuracy of the …
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A high voltage, high current, low error operational amplifier with novel features
… are chiefly formed around high voltage and high current drive functionality. A novel topology is introduced which compensates base current errors introduced by the individual stages, resulting in a very low (first-order canceled) overall input-referred voltage offset. Novel features are …
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Extracting and utilizing hidden structures in large datasets
… for the design of algorithms that surpass the current limit, and empower new applications in database research and many other data-centric disciplines.
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Confinement Limits For Tensile Lap Splices Under Static Loading
… code provisions are partially based. However, a limit exists on the benefit that can be derived from this confinement. In Canada, CSA Standard CAN3 A23.3 M-84, does not directly recognize the confinement benefit provided by stirrups along a lap splice. The current study shows that the ACI limit …
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Investigation of High Performance AC/DC Front-End Converter with Digital Control for Server Applications
… the passive component size, its effectiveness is limited by the converter efficiency and thermal management. Technologies to further increase the power density without compromising the efficiency need to be studied. The industry today is also at the beginning of transferring their design from …
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Smart Power Module for Distributed Sensor Power Network of an Unmanned Ground Vehicle
… where conversion losses directly set the upper limit of system efficiency. A wide variety of commercially available DC-DC conversion elements have inefficiencies in the 90-97% range. The efficiency range of most common commercial-off-the-shelf (COTS) power supplies is 75-85%, highlighting the …
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Neutron Emission Following Nuclear Muon Capture in Al
… of four orders of magnitude beyond the current limit set by the SINDRUM II collaboration. Achieving this sensitivity requires a thorough understanding of the backgrounds and competing interactions. Therefore, the AlCap collaboration was formed to study particle emissions from μ− + Al-27 …
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Miniature Fiber-Optic Sensors for High-Temperature Harsh Environments
… reach beyond 600°C for today's large engines. Current fiber-optic sensor can operate up to about 300°C and even the most widely employed semiconductor sensors are limited below 500°C. The objective of this research is to push the limit of fiber-optic sensing technology in harsh environment …
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Rapid Drawdown Analysis using the Finite Element Method
… case of levees, during a prolonged flood. The current state of practice for RDD analysis is a multi-stage undrained strength method based on limit equilibrium. The primary objective of this research was to develop a new method for rapid drawdown based on the finite element method. The new …
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Application of Fourier-transformed-infrared spectroscopy to quantitate amorphous silica in personal air samples in sugarcane cutters
… and cost-effectively compared to the currently accepted NIOSH method (e.g., X-ray diffraction). The model was created, and initial concentrations of amorphous silica were determined. During the analysis of samples, the need to ascertain the detection limit of the FTIR method was …
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Two-dimensional quench propagation model for a three-dimensional "high-temperature" superconducting coil
… magnet inductance, for a given set of operating current and temperature, on the maximum temperature reached in one full turn of the conductor located at the magnet outermost layer driven normal with a heater. The simulation demonstrates that there is an operating current limit for a given magnet …
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Is the presence of biomolecules evidence for molecular preservation in the fossil record?
… environment (i.e., fluvial), representing the current limit of the reported protein preservation in the fossil record. Unlike previous studies that have focused on organic extractions to detect biomolecules, I studied intact fossil bones and the rocks they were found in, to understand more …
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semiconducting carbon nanotube transistors: electron and spin transport properties
… order to explore the transport of spin-polarized current through the SWNT. In some cases spin-dependent transport was observed, verifying long spin scattering lengths in SWNT. However, in many cases no spin-dependent effects were observed; these results will be discussed in the context of the …
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Optimal MOSFET design for low temperature operation
… In addition, lower temperatures increase the current drive via increased carrier mobility and saturation velocity. Equally as important, the parasitic resistances of the device and of the interconnect decrease as temperature decreases. The approach of this thesis is to use comparisons of …
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Topology Investigation and System Optimization of Resonant Converters
… power density, low EMI, easy startup and over current protection. LLC resonant converters can achieve zero-voltage-switching (ZVS) for primary side devices and zero-current-switching (ZCS) for the secondary side rectifiers. The switching loss is minimized. LLC is very attractive to overcome the …
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The impact of transient mitigation schemes on the MAST edge plasma
… occur when operational boundaries, in terms of current, pressure and density, are exceeded. An analysis of the operational boundaries in MAST shows that the frequency of disruptive events increases as the density is raised to 1.5 times the Greenwald density limit and that the pressure limit is …
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Community structure and function of mixed microalgal communities for nutrient recovery and the selection of lipid and carbohydrate accumulators for enhanced feedstock production in wastewater treatment
… with effluent nutrient concentrations below the current limit-of-technology while simultaneously producing carbon-rich biomass. Despite this potential, current systems are operated empirically and suffer from unpredictable community dynamics that hinder performance. In order to create engineered …
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Modeling, Control and Design Considerations for Modular Multilevel Converters
… DC fault ride-through capability and DC fault current blocking ability is illustrated in both the Modular Multilevel Converter with Full-Bridge (FB) power cells and in the Alternate Arm Converter (AAC). Accordingly, the DC fault control scheme employed in the converter and the operation of the …
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Prognostic markers associated with tyrosine kinase inhibitor treatment response and maintenance of treatment free remission in chronic myeloid leukaemia
… ≤10% at 3 months after starting treatment) is currently acknowledged as one of the strongest prognostic markers, and salvage strategies targeting patients failing to achieve time dependent molecular targets may be an optimal point of intervention. The TIDEL-II study examined such a strategy, …
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