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 69 for “"portable electronics"”.
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Free air breathing planar PEM fuel cell design for portable electronics
… to create a minimum size for integration into portable electronics. A planar fuel cell design utilizes the bare minimum in volume and mass over current stacked fuel cell designs. This was done by taking an innovative approach of assembling the fuel cell with just the bare minimum components, a …
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Highly - conductive cathode for lithium-ion battery using M13 phage - SWCNT complex
Lithium-ion batteries are commonly used in portable electronics, and the rapid growth of mobile technology calls for an improvement in battery capabilities. Reducing the particle size of electrode materials in synthesis is an important strategy for improving their rate capability and power density …
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Low-energy radix-2 serial and parallel FFT designs
The push for portable electronics for communication and biomedical applications has accelerated the growing momentum for high performance and low energy hardware implementations of the Fast Fourier Transform (FFT). This work presents several new hardware implementations of the radix-2 FFT …
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Evaluation of the commercial potential of novel organic photovoltaic technologies
… particularly suitable for transportation and portable electronics applications. Four organic photovoltaic technologies as well as the advantages and setbacks of each are described including Graetzel (wet) cells, blended photovoltaics, asymmetric tandem cells with hybrid planar-mixed molecular …
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Towards and industrial ecosystem for power MEMS
… temperatures and hence is suitable for use in portable electronics. The third are solid-state devices which convert heat into electricity via either the Seeback (thermocouple) or photovoltaic effects, or else via thermionic emission. Finally, we consider devices which scavenge vibrational or …
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Nano-Silicon/graphene Composite Anodes For Enhanced Performance Lithium Ion Batteries
… evolving technological applications such as with portable electronics and electric vehicles have led to increasing energy demands that have proven the existing commercial LIB capacity insufficient. Recently, the most promising anode material to substitute the traditional graphite is Si. As an …
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Rapid and green fabrication of psuedocapacitor electrode by utilizing novel ULPING technique
… in the recent technological revolution in portable electronics, EVs, and power-demanding applications forecasting exponential growth in billions of dollars in the near decade. Psuedocapacitors, a type of supercapacitor is growing in extreme demand due to their larger specific capacitance …
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Design and implementation of a converter with wide operating range using a Variable-Inverter-Rectifier-Transformer structure
Power supplies for portable electronics such as cell phones, tablets, and laptops characterized by the low-voltage load are supplied by a single-phase grid-tied ac-dc converter. Achieving miniaturization and high efficiency of power supplies in this application is challenging due to the large …
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Interfacing living plants with nanomaterials for in planta sensing and plant biotechnology applications
… into an optical readout easily interpreted by portable electronics.
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High-temperature microfluidic systems for thermally-efficient fuel processing
… to outperform batteries in powering a variety of portable electronics. The key to this technology is the ability to efficiently process an easily-stored, energy-dense fuel. In many cases, use of these fuels requires a fuel processor-a high temperature chemical reactor that generates a …
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An energy efficient AES engine with DPA-resistance
The advent of portable electronics which transmit and receive sensitive data via wireless communication have led to interest in the design of energy-efficient security engines. The hardware implementation of cryptographic algorithms, however, leaks side-channel information about the operations they …
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The Material Separation Process for Recycling End-of-life Li-ion Batteries
End-of-life lithium-ion batteries retired from portable electronics, electric vehicles (EVs), and power grids need to be properly recycled to save rare earth metals and avoid any hazardous threats to the environment. The recycling process of a Lithium-ion Battery Cell/Module includes storage, …
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Design and development of multifunctional energy harvesting and storage systems for sensor applications
… IDentification (RFID) tags, GPS sensors, portable electronics, etc. Tire-based power generation can be used for powering battery-less wireless Tire Pressure Monitoring Systems (TPMS), wireless Vehicle Speed Sensors (VSS), tire health monitoring sensors, etc. Fully functional …
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Solvent-free additive manufacturing of electrodes for Li-ion batteries
… readily implemented for small platforms, such as portable electronics. However, this method isn't as economically viable in large platforms due to high material and manufacturing costs. High material and manufacturing costs are mostly attributed to the use of organic solvents, typically …
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Fuzzy-Rule-Based Failure Detection and Early Warning System for Lithium-ion Battery
… battery, and also renewable, sustainable and portable. With the merits of high density, slow loss of charge when spare and no memory effect, lithium-ion battery is widely used in portable electronics and hybrid vehicles. Apart from its advantages, safety is a major concern for Lithium-ion …
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Dynamic modelling and emulation of a high temperature proton exchange membrane fuel cell (HT PEMFC)
… of a variety of applications, ranging from portable electronics to utility power plants. Compared to systems utilizing fossil fuels, fuel cells offer greater efficiency and superior reliability. In particular, proton exchange membrane FCs (PEMFCs) presents a good alternative energy source …
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Design and Implementation of A Three-Level Boost converter for Battery Impedance Spectroscopy
… storage device in various applications such as portable electronics, electric vehicles, Photovoltaic application, telecommunication etc due to the characteristics of the batterie such as high-power density, long cycling and high-power efficiency. Extensive condition monitoring of the battery …
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A fully-integrated multi-watt permanent-magnet turbine generator
… a limiting factor in the capabilities of portable electronics. As a result, there is a growing need for compact, high energy density sources. This thesis presents the design, fabrication, and testing of a fully-integrated permanent-magnet turbine generator based on silicon MEMS technology …
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Energy efficient ultra-wideband radio transceiver architectures and receiver circuits
… an active research area with proliferation of portable electronics. A critical specification for radio efficiency is energy/bit. The FCC has allocated the 3.1-10.6 GHz band for radios using ultra-wideband (UWB) signals. In this research, I exploit UWB signaling to develop energy efficient …
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Molecular Dynamics Study of Dendrite Formation in Lithium-Metal Anodes
… beyond current limits for electric vehicles and portable electronics. Chapters II and III employ classical molecular dynamics simulations to elucidate the fundamental mechanisms of lithium dendrite nucleation and growth on both silicon-based and pure lithium metal anodes. In Chapter II, we …
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