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 18 of 18 for “"Energy scavenging"”.
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Energy scavenging system for indoor wireless sensor network
… One such method aims to further the sensors energy independence on humans. This technique is known as energy scavenging. The logic behind energy scavenging is to allow the device to have its own reliable source of energy that does not require upkeep, has a long life expectancy, and does not …
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A study of energy scavenging strategy in a tapping tree power
Energy harvesting has become one of the newest research attraction for both academic and industry fields. The energy is captured from external sources (thermal, wind, solar, vibration and hydrodynamic) and the energy source for energy harvesters is present as ambient background and it is free. The …
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Wide-Dynamic-Range Continuous-Time Delta-Sigma A/D Converter for Low-Power Energy Scavenging Applications
<p>Many medical, environmental, and industrial control applications rely on wide-dynamic-range sensors and A/D converter systems. For most photo-detector-based applications, the input-current is integrated onto a capacitor, either with a variable time, or a variable capacitor value, followed by a …
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Adaptive Energy Saving and Mobility Support IPv6 Routing Protocol in Low-Power and Lossy Networks for Internet of Things and Wireless Sensor Networks
… from a different perspective extending from energy efficiency, to mobility aware and energy scavenging nodes thereby presenting numerous improvements that can suit various network topologies and application needs. Envisioning all the prospects and innovative services associated with the …
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The Machine that Lives Forever
… can self-power and sustain from environmental energy scavenging to achieve an autonomous device that can communicate at will with peers indefinitely. Explore sleep/wake hibernation strategies coupled with food scavenging off-grid traits to identify the tightest work to sleep efficiency …
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Hybrid Structural Composites with Energy Harvesting Capabilities
… materials such as sensing, actuating, energy scavenging, thermal management, and vibration damping. While traditional materials can be utilized for either one of these functions or loadbearing, the hybrid materials are superior as they allow combination of a wide array of …
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Optimisation and frequency tuning concepts for a vibration energy harvester
… electronics has far outpaced the scaling up of energy density in batteries. Therefore, a great deal of research has been carried out to search for alternative power sources that can replace or enhance the conventional battery. Energy harvesting (also known as energy scavenging) is the process …
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Energy -Efficient Sensor Networks for Detection Applications
… networks powered by batteries or charged by energy-scavenging devices are to be used in a wide variety of applications where detection is the primary step. Faced with tight constraints on energy, bandwidth, and other system resources, the new paradigm of decentralized detection under resource …
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Piezoelectric Micro Power Generator (PMPG) : a MEMS-based energy scavenger
… have used chemical batteries to supply their energy. However, batteries are no longer suitable for many of these remote applications due to their relatively large bulk and weight, limited lifetime and high cost. The commercially sponsored Auto ID tag has demonstrated the need for a power …
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Energy-aware network coding circuit and system design
… without providing enough insight about its energy requirements. As more and more mobile devices, sensors and other low power systems are used in modern communication protocols, a highly efficient and optimized implementation of NC is required. In this work, an effort is made to bridge NC …
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Mechanically flexible vapor-deposited polymeric thin films for electrochemical devices
… electronic device for exporting functions, an energy generation/conversion device responsible for harvesting/scavenging renewable energy, and additionally an energy storage device to ensure non-intermittent operation. The three units should be matched up in terms of energy and power, which …
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Nanopower Analog Frontends for Cyber-Physical Systems
… of basic stages: transduction, filtering, energy conversion, measurement, and interfacing. One analog artifact that was investigated for filtering was the physical phenomenon of hysteresis induced in current-mode biquads driven near or at their saturation limit. Known as jump resonance, …
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Combined Shock and Vibration Isolation Through the Self-Powered, Semi-Active Control of a Magnetorheological Damper in Parallel with an Air Spring
… systems. Also explored is the feasibility of scavenging and storing ambient shipboard vibration energy for use in powering the isolation system. To date the literature has not adequately explored the direct design of a combined shock and vibration isolation system. As shock and vibration …
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Energy Harvesting Applications of Ionic Polymers
… analysis of applications for ionic polymers as energy harvesting devices. The specific need is a self-contained energy harvester to supply renewable power harvested from ambient vibrations to a wireless sensor. Ionic polymers were investigated as mechanical to electrical energy transducers. An …
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A comparison of power harvesting techniques and related energy storage issues
Power harvesting, energy harvesting, power scavenging, and energy scavenging are four terms commonly used to describe the process of extracting useful electrical energy from other ambient energy sources using special materials called transducers that have the ability to convert one form of energy …
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From Process to Circuits: New Perspectives to Solar Cell Design
As the demand for cheap and clean energy sources increased over the last two decades, solar cells have proven to be strong candidates against the fossil fuels. From an economic perspective, in order to replace fossil fuels, it is required to reduce the cost of solar cells. This can be achieved by …
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Surface and interface engineering in quantum dot and double-heterojunction nanorod light-emitting diodes
… over hole injection. This difference of energy barriers for electron and holes introduce difficulties for charge balance, which essentially affects the radiative carrier recombination, and the device performance. For example, while nanocrystal-based LEDs are showing high efficiencies, the …